bhargavi

NCERT Solution For Class 8 Science Chapter 12 Some Natural Phenomena Multiple Choice Questions

Question 1. An electroscope is a device that is used to find if an Object is

1. Charged
2. Magnetic
3. Free Of Cracks
4. Hot

Answer: 1. Charged

NCERT Solutions for Some Natural Phenomena MCQs Class 8

Question 2. Lightning conductor

1. Destroys The Building
2. Protects The Building
3. Does Not Affect The Building
4. None Of The Above

Answer: 2. Protects The Building

Question 3. Where is the lightning rod attached to protect the building from lightning?

1. On top of the building
2. In the middle of building
3. On the bottom of the building
4. All of the above

Answer: 1. On top of the building

Question 4. Which of the following is not likely to cause a tsunami?

1. A major nuclear explosion under the sea
2. Earthquake
3. Volcanic eruption
4. Lightning

Answer: 4. Lightning

NCERT Solutions for Class 8 Science Some Natural Phenomena MCQs

Question 5. The movement of the Earth’s plates causes

1. Cyclones
2. Lightning
3. Earthquake
4. Thunderstorms

Answer: 3. Earthquake

Question 6. The Earth’s plate is responsible for causing earthquakes.

1. The Crust Of The Earth
2. The Mantle Of The Earth
3. The Inner Core Of The Earth
4. The Outer Core Of The Earth

Answer: 4. The Outer Core Of The Earth

Question 7. Consider the list of terms given below

1. Competency
2. Seismic
3. Mantle
4. Fault zone
5. Inner core

NCERT Solutions for Some Natural Phenomena Chapter 12 MCQs

Question 8. The boundaries of the Earth’s plate are known as

1. 1 and 2
2. 1 and 3
3. 3 and 4
4. 2, 3, and 4

Answer: 2. 1 and 3

Question 9. The waves produced on the Earth’s surface are called

1. Radio Waves
2. Longitudinal Waves
3. Microwaves
4. Seismic Waves

Answer: 4. Seismic Waves

NCERT Class 8 Science Chapter 12 Some Natural Phenomena MCQs

Question 10. Tsunami means

1. Earthquake
2. Flood
3. Earthquake Under Sea
4. Eruption

Answer: 3. Earthquake Under Sea

Question 11. The outermost layer of the Earth is called the Competency

1. Mantle
2. Outer Core
3. Crust
4. Inner Core

Answer: 3. Crust

Some Natural Phenomena Class 8 NCERT MCQs

Question 12. Major earthquakes are less likely to occur in

1. North East India
2. rajasthan
3. rann of kutch
4. Orissa

Answer: 4. Orissa

Some Natural Phenomena MCQs NCERT Solutions Class 8

Question 13. Which instruments are used to measure earthquakes?

1. Polygraph
2. Seismography
3. Biometer
4. Thermometer

Answer: 2. Seismography

NCERT Solutions For Class 8 Science Chapter 4 Combustion And Flame Multiple Choice Questions

Question 1. Bunsen burner contains a gas X which burns with a blue flame. What is the reason behind the blue coloured flame?

1. Complete combustion of gas X
2. Presence of impurities in the gas
3. Low temperature of the flame
4. Incomplete combustion of gas X

Answer: 1. Carbon dioxide

Question 2. Unburnt carbon particles are present in the

1. Luminous flame
2. Non-luminous flame
3. Dark flame
4. Flickering flame

Answer: 1. Luminous flame

NCERT Solutions for Combustion and Flame MCQs Class 8

Question 3. Which is the hottest zone in a candle flame?

1. Blue zone
2. Yellow zone
3. Dark zone
4. Grey zone

Answer: 1. Blue zone

Question 4. What is the main product of the incomplete combustion of coal?

1. Carbon dioxide
2. Oxygen
3. Water vapour
4. Nitrogen dioxide

Answer: 1. Carbon dioxide

NCERT Solutions for Class 8 Science Combustion and Flame MCQs

Question 5. The calorific value of a fuel is expressed in a unit called

1. kilojoule per litre
2. kilojoule per milliliter
3. kilojoule per gram
4. kilojoule per kilogram

Answer: 4. kilojoule per kilogram

Question 6. Which one among the following is considered the cleanest fuel?

1. Cowdung cake
2. Petrol
3. Kerosen
4. Hydrogen gas

Answer: 4. Hydrogen gas

NCERT Solutions for Combustion and Flame Chapter 4 MCQs

Question 7. In villages, people use wood as fuel because

1. It is considered to be an ideal fuel
2. Of its easy availability and low cost
3. It is environmentally friendly
4. It catches fire easily

Answer: 2. Of its easy availability and low cost

Question 8. Shyam was cooking potato curry on a chulha. To his surprise, he observed that the copper vessel was getting blackened from the outside. It may

1. Proper combustion of fuel
2. Improperly cooked potato curry
3. Improper combustion of the fuel
4. Burning of a copper vessel

Answer: 3. Improper combustion of the fuel

Question 9. Which one of the following has the highest calorific value?

1. Kerosene
2. Biogas
3. LPG
4. Petrol

Answer: 3. LPG

Combustion and Flame Class 8 NCERT MCQs

Question 10. Our beautiful Taj Mahal is suffering from ‘marble cancer’. Acid rain reacts with marble and limestone to form calcium sulfate. It causes damage to big sculptures and marble constructions. Identify the gases that contribute to the formation of acid rain.

1. Nitrogen oxides and carbon oxides
2. Carbon dioxide and carbon monoxide
3. Sulphur oxides and carbon oxides
4. Nitrogen oxides and sulphur oxides

Answer: 4. Nitrogen oxides and sulphur oxides

Question 11. Which of the following cases is an example of spontaneous combustion?

1. Lighting a gas store
2. A car engine starting
3. A pile of dry leaves catching fire in summer
4. A chemical reaction in the laboratory

Answer: 3. Carbon dioxide

Combustion and Flame Class 8 MCQs and Answers

Question 12. Which type of combustion is characterised by a lack of oxygen during the burning process?

1. Spontaneous combustion
2. Incomplete combustion
3. Rapid combustion
4. Controlled combustion

Answer: 2. Incomplete combustion

Question 13. What is the minimum temperature at which a substance catches fire and burns on its own?

1. Boiling point
2. Melting point
3. Ignition temperature
4. Freezing point

Answer: 3. Ignition temperature

NCERT Chapter 4 Combustion and Flame MCQs Class 8

Question 14. Which of the following fire extinguishers is suitable for tackling electrical fires?

1. Water fire extinguisher
2. Foam fire extinguisher
3. Carbon dioxide fire extinguisher
4. Powder fire extinguisher

Answer: 3. Carbon dioxide fire extinguisher

NCERT Solutions For Class 8 Science Chapter 11 Chemical Effects Of Electric Current Multiple Choice Questions

Question 1. An electric current can produce

1. Heating Effect
2. Chemical Effect
3. Magnetic Effect
4. Chemical, Heating, And Magnetic Effects

Answer: 4. Chemical, Heating, And Magnetic Effects

Question 2. When an electric current is passed through a conductor solution, there is a change in colour of the solution. This indicates

1. The Chemical Effect of Current
2. The Heating Effect Of Current
3. The Magnetic Effect Of Current
4. The Lightning Effect Of Current

Answer: 1. The Chemical Effect of Current

NCERT Class 8 Science Chapter 11 Chemical Effects of Electric Current MCQs

Question 3. Tia used four different objects to fill the gap in an electric circuit, separately. The table shows what she found.

1. Which of these best conducts electricity?

1. Wood
2. Plastic
3. Copper
4. Graphic

Answer: 3. Copper

NCERT Solutions for Chemical Effects of Electric Current Chapter 11

2. Which of these is a chemical effect of electric current?

1. Glowing of the bulb
2. Heating of water
3. Ringing of a mobile phone
4. Chromium plating on iron.

Answer: 4. Chromium plating on iron

3. Which of these is a correct pair of an insulator and a conductor?

Answer: D

Question 4. Which of the following metals is used in electroplating to 5 make an object shinier and attractive?

1. Graphite
2. Zinc
3. Chromium
4. Iron

Answer: 2. Zinc

Chemical Effects of Electric Current MCQs Class 8 NCERT Solutions

Question 5. The object to be electroplated is taken as

1. Cathode
2. Anode
3. Both Can Be Taken
4. None Of These

Answer: 2. 1. Cathode

Question 6. Water can be dissociated into its components by the process of

1. Electroplating
2. Electrolysis
3. Evaporation
4. All Of These

Answer: 2. Electrolysis

NCERT Solutions For Class 8 Science Chapter 10 Sound Multiple Choice Questions

Question 1. The ultrasound waves can penetrate matter to a large extent because they have

1. Very High Frequency
2. Very High Speed
3. Very High Quality
4. Very High Amplitude

Answer: 1. Very High Frequency

Question 2. A person works in a factory where a lot of industrial machines run daily. What harmful effects is he likely to suffer from?

1. Fever
2. Cataract
3. Lack of vision
4. Lack of hearing

Answer: 4. Lack of hearing

NCERT Class 8 Science Chapter 10 Sound MCQs

Question 3. Loudness of sound is measured in units of

1. Decibel (db)
2. Hertz (Hz)
3. Metre (m)
4. Metre/second(m/s)

Answer: 1. Decibel (db)

Question 4. The loudness of sound is determined by its

1. Amplitude of vibration
2. Ratio of amplitude and frequency of vibration
3. Frequency of vibration
4. Product of amplitude and frequency of vibration

Answer: 1. Amplitude of vibration

Question 5. Pitch of sound is determined by its NCERT

1. Frequency
2. Speed
3. Amplitude
4. Loudness

Answer: 1. Frequency

NCERT Solutions for Sound Chapter 10

Question 6. The maximum displacement of a vibrating body from its mean position Is called

1. Frequency
2. Period
3. Amplitude
4. None Of These

Answer: 3. Amplitude

Question 7. Ultrasound has a frequency of vibration

1. Between 20 and 20000 Hz
2. Below 20 Hz
3. Above 20000 Hz
4. Between 500 and 10000 Hz

Answer: 3. Above 20000 Hz

Question 8. Which of the following sounds can be classified as noise for humans?

1. Sounds that are softer than 20 dB
2. Sounds that are in between 20 dB and 40 dB
3. Sounds that are between 40 dB and 80 dB
4. Sounds that are louder than 80 dB

Answer: 4. Sounds that are louder than 80 dB

Class 8 Chapter 10 Sound Multiple Choice Questions

Question 9. Which of the following are used to study the growth of the foetus inside the mother’s womb?

1. Radiowaves
2. X-rays
3. Infrared waves
4. Sound waves

Answer: 4. Sound waves

Question 10. Sound can be produced by

1. Applying an object
2. Vibration on objects
3. Passing electric current through an object.
4. Effect of a magnet on an object

Answer: 2. Vibration ot objects

Question 11. Loudness of sound depends upon its

1. Frequency
2. Pitch
3. Amplitude
4. Shirillness

Answer: 3. Amplitude

NCERT Solutions for MCQs on Sound Chapter 10

Question 12. The human brain can sense sound frequencies

1. Less Than 20 Hz
2. Between 20 Hz And 20000 Hz
3. More Than 20000 Hz
4. All Of The Above

Answer: 2. Between 20 Hz And 20000 Hz

NCERT Solutions For Class 8 Science Chapter 8 Force And Pressure Multiple Choice Questions

Question 1. Force due to the charged particles is known as

1. Muscular force
2. Magnetic force
3. Electrostatic force
4. Gravitational force

Answer: 3. Electrostatic force

Question 2. The pressure exerted by liquid due to an Increase In depth

1. Reduces
2. Increases
3. Remains same
4. Depends on the nature of the liquid

Answer: 2. Increases

NCERT Solutions for Force and Pressure MCQs Class 8

Question 3. Some mustard oil is kept in the beaker. It will exert pressure

1. Upward
2. Downward
3. Sideways
4. In all the directions

Answer: 4. In all the directions

Question 4. During dry weather, while combing hair, sometimes we experience hair flying apart. The force responsible for this is

1. Force of gravity
2. Electrostatic force
3. Force of friction
4. Magnetic force

Answer: 2. Electrostatic force

NCERT Solutions for Class 8 Science Force and Pressure MCQs

Question 5. Which one of the following forces is a contact force?

1. Force of gravity
2. Force of friction
3. Magnetic force
4. Electrostatic force

Answer: 2. Force of friction

Question 6. The standard value of atmospheric pressure is

1. 78 cm of Hg
2. 76 mm of Hg
3. 45 cm of Hg
4. 0.76 cm of Hg

Answer: 2 76 mm of Hg

NCERT Solutions for Force and Pressure Chapter 8 MCQs

Question 7. Two objects repel each other; this repulsion could be due to

1. Tractional force
2. Electrostatic force
3. Magnetic force
4. Either a magnetic or an electrostatic force

Answer: 3. Magnetic force

Question 8. How much pressure would be exerted by a block exerting 20 N of force on a 0.5 m 2 area?

1. 10N/m²
2. 20 N/m²
3. 30 N/m²
4. 40 N/m²

Answer: 4. 20 N/m²

Question 9. Which of these is an example of a contact force?

1. A guava falling from the tree.
2. A magnet attracts a hanging iron nail.
3. A plastic comb attracts small pieces of hair.
4. A boat moving on water by the action of wind on its sail.

Answer: 4. A boat moving on water by the action of wind on its sail.

Force and Pressure Class 8 NCERT MCQs

Question 10. Which of these is not true for force?

1. A force can change the state of motion of an object
2. A force can change the shape of an object
3. A force can act between two solid objects only
4. Forces applied on an object in the same direction add to one another.

Answer: 3. A force can act between two solid objects only

NCERT Solutions For Class 8 Science Chapter 7 Reaching The Age Of Adolescence Multiple Choice Questions

Question 1. Which endocrine gland is attached to the brain?

1. Adrenal
2. Pancreas
3. Pituitary
4. Thyroid

Answer: 3. Pituitary

NCERT Class 8 Science Chapter 7 Reaching the Age of Adolescence MCQs

Question 2. Which choice appropriately distinguishes the roles of oestrogen and insulin?

1. Oestrogen plays a role in the development of mammary glands, while insulin helps to control blood sugar levels
2. Oestrogen plays a role in promoting the growth of facial hair, while insulin helps to control blood sugar levels
3. Oestrogen helps to control blood sugar levels, while insulin plays a role in promoting the growth of facial hair
4. Oestrogen helps to control blood sugar levels, while insulin plays a role in the development of mammary glands

Answer: 1. Oestrogen plays a role in the development of mammary glands, while insulin helps to control blood sugar levels

Question 3. The faulty functioning of an endocrine gland can make a person very short or very tall. This gland is

1. Thyrouid
2. Pituitary
3. Adreied
4. Pancreas

Answer: 2. Pituitary

NCERT Solutions for Reaching the Age of Adolescence Chapter 7

Question 4. What are the consequences of drug addiction?

1. They can harm our body
2. They can protect our body from infections
3. They can enhance the body’s immunity
4. They can make our body resistant to harmful organisms

Answer: 1. They can harm our body

Question 5. AIDS can spread from an infected person to another person through

1. Sharing food
2. Blood transfusion
3. Sharing comb
4. A mosquito bite

Answer: 2. Blood transfusion

Assessment Exercise Multiple Choice Questions

Question 6. What physiological changes take place in females during puberty?

1. Development of a large voice box
2. Development of hair on the face and chest
3. The region below the waist becomes wider
4. Shoulder broaden

Answer: The Region below the waist becomes wider

Question 7. During puberty, hormones are produced. What secondary sexual characteristics typically emerge when testosterone is released in males?

1. High-pitched voice
2. Development of Adam’s apple
3. Development of mammary glands
4. Growth of hair on the head

Answer: Development of Adam’s apple

Reaching the Age of Adolescence MCQs Class 8 NCERT Solutions

Question 8. Which of the following options correctly describes women’s menstrual cycle?

1. The release of the fertilised egg from the uterus that occurs once a month
2. The release of the unfertilised egg from the uterus that occurs once in 28-30 days
3. The release of the unfertilised egg from the ovary that occurs once in 28-30 days
4. The release of the fertilised egg from the ovary that occurs twice in a month

Answer: The release of the unfertilised egg from the ovary that occurs once in 28-30 days

Question 9. What would likely be the gender of a child if a sperm with Having Y chromosome fertilised an egg?

1. A boy, as the unfertilised egg has one X chromosome
2. A girl, as the unfertilised egg has one Y chromosome
3. A girl, as the unfertilised egg has one X chromosome
4. A boy, as the unfertilised egg has one Y chromosome

Answer: A boy, as the unfertilised egg has one Y chromosome

MCQs for Reaching the Age of Adolescence Chapter 7 Class 8

Question 10. Which of the following is not a hormone?

1. Thyroxine
2. Insulin
3. Adrenal
4. Insect hormone

Answer: Adrenal

NCERT Solutions For Class 8 Conservation Of Plants And Animals Multiple Choice Questions

Question 1. A tiger reserve is a forest area where the tiger population is protected. Why did the Indian government declare parts of many forests as tiger reserves?

1. Tigers is a mammals
2. The tiger is our national animal
3. Tiger is an endangered species
4. Tiger is the top predator of the forest ecosystem

Answer: 3. The Tiger is an endangered species

Question 2. Which statement is incorrect about endangered species?

1. Their number has decreased drastically
2. They might become extinct shortly
3. They pose a danger to other animals
4. Their natural habitat needs to be protected

Answer: 3. They pose a danger to other animals

NCERT Class 8 Science Chapter 5 Conservation of Plants MCQs

Question 3. Wild buffalo is an endangered species because

1. Its population is diminishing
2. It has become extinct
3. It Is found exclusively in a particular area
4. Poaching is strictly prohibited

Answer: 1. Its population is diminishing

Question 4. Snakes are killed in large numbers because

1. They Arc Very Poisonous
2. They Kill Rats
3. Their Skin Is Expensive
4. They Damage The Crops

Answer: 3. Their Skin Is Expensive

Question 5. The Red Data Book keeps a record of all the

1. Endemic species
2. Extinct species
3. Endangered plant
4. Endangered animals

Choose the correct option 

1. (1)and(2)
2. (2) and (3)
3. (3) and (4)
4. (1) and (4)

Answer: 3. (3) and (4)

NCERT Solutions for Conservation of Plants Chapter 5

Question 6. The migratory birds come to India every year in winter for a few months.

1. To escape the severe summer
2. To escape the severe winter
3. To escape the heavy rains
4. To escape from predators

Answer: 2. To escape the severe winter

Question 7. Why should we recycle paper?

1. Paper is biodegradable
2. Recycled paper is stronger
3. Production of paper requires a lot of wood pulp
4. Recycling of paper produces useful by-products

Answer: 3. The Production of paper requires a lot of wood pulp

Class 8 Chapter 5 Conservation of Plants Multiple Choice Questions

Question 8. What kind of approach should one take to lessen deforestation?

1. Limiting the use of paper
2. Using only fine-quality paper for work
3. Throwing old newspapers in the dustbins
4. Bury the used and waste paper instead of burning it

Answer: 1. Limiting the use of paper

Question 9. Planting new trees is called

1. Species
2. Deforestation
3. Desertification
4. Reforestation

Answer: 4. Reforestation

Question 10. What is expected to be accomplished by planting trees in the forest?

1. Conservation of forests and animals
2. Increase in the number of extinct species
3. A decrease in the number of predator species
4. Availability of more information for the Red Data Book

Answer: 1. Conservation of forests and animals

Question 11. Which term is used for the species that are found only in a particular area?

1. Extinct
2. Endemic
3. Endangered
4. Threatened

Answer: 2. Endangered

NCERT Solutions for MCQs on Conservation of Plants

Question 12. Which of these books keeps a record of all the endangered animals and plants?

1. Red Data Book
2. Blue Data Book
3. Black Data Book
4. Green Data Book

Answer: 1. Red Data Book

Question 13. Which of the following is not true regarding deforestation?

1. Causes soil erosion
2. Causes a decrease in temperature
3. Causes global warming
4. Causes drought

Answer: 2. Causes a decrease in temperature

Question 14. Animals whose numbers are diminishing to the level that they might face extinction are known as

1. Endemic
2. Endangered
3. Extinct
4. Fauna

Answer: 2. Endangered

NCERT Class 8 Conservation of Plants Chapter 5 MCQs

Question 15. Choose the factors that prove that if not taken care the endemic species may vanish shortly.

1. Increasing population
2. Destruction of habitat
3. Introduction of new species
4. All of the above

Answer: 4. All of the above

NCERT Solutions For Class 8 Science Chapter 9 Friction Multiple Choice Questions

Question 1. Treads are made in the tyres to

1. Increase Friction
2. Decrease Friction
3. Speed Up The Vehicle
4. Speed Down The Vehicle

Answer: 1. Increase Friction

NCERT Solutions for Friction MCQs Class 8

Question 2. In a large commercial complex, there are four ways to reach the main road. One of the paths has loose soil, the second is laid with polished marble and the third is laid with bricks, and the fourth has a gravel surface. It is raining heavily and Paheli wishes to reach the main road. The path on which she is least likely to slip is

1. Loose Soil
2. Bricks
3. Polished Marble
4. Gravel

Answer: 4. Gravel

NCERT Solutions for Class 8 Science Friction MCQs

Question 3. Which of the following statements is Incorrect?

1. Friction acts on a ball rolling along the ground.
2. Friction acts on a boat moving on water.
3. Friction acts on a bicycle moving on a smooth road.
4. Friction does not act on a ball moving through the air.

Answer: 4. Friction does not act on a ball moving through air.

Question 4. Whenever the surfaces in contact tend to move or move to each other, the force of friction comes into play

1. Only if the tire objects are solid
2. Only if one of the two objects is liquid
3. Only if one ofthe two objects is gaseous
4. Irrespective ofwhether the objects are solids, liquids, or gases

Answer: 4. Irrespective of whether the objects are solids, liquids, or gases

NCERT Class 8 Science Chapter 9 Friction MCQs

Question 5. The fish swim easily in the water because they have

1. More energy
2. Streamlined shape
3. Both (1) and (2)
4. None of these

Answer: 2. Streamlined shape

Friction In Daily Life Class 8 Science  Multiple Choice Questions

Question 6. The direction of friction is always

1. Opposes the motion
2. Direction of motion
3. Perpendicular to the motion
4. None of the above

Answer: 1. Opposes the motion

NCERT Solutions for Friction Chapter 9 MCQs

Question 7. Which of the following devices is used to measure the force acting on an object?

1. Spring balance
2. Odometer
3. Both (a) and (b)
4. None of the above

Answer: 1. Spring balance

Question 8. Which of the following does not reduce friction?

1. Streamlined shape
2. Lubricant
3. Sand
4. Oil

Answer: 3. Sand

Friction Class 8 NCERT MCQs

Question 9. The frictional force exerted by fluids is also known as

1. Drag
2. Static Friction
3. Rolling Friction
4. Sliding Friction

Answer: 1. Drag

NCERT Class 8 Science Chapter 6 Reproduction In Animals Multiple Choice Questions

Question 1. Aquatic animals in which fertilisation occurs in water are said to be

1. Viviparous without fertilisation
2. Oviparous with external fertilisation
3. Viviparous with internal fertilisation
4. Oviparous with internal fertilisation

Answer: 2. Oviparous with external fertilisation

NCERT Class 8 Science Chapter 6 Reproduction in Animals MCQs

Question 2. Which is not an oviparous animal?

1. Hen
2. Frog
3. Butterfly
4. Dog

Answer: 4. Dog

Question 3. In the list of animals given below, the lion is the odd one out.

Human being, cow, dog, hen.

The reason for this is

1. It undergoes internal fertilisation
2. It is oviparous
3. It is viviparous
4. It undergoes external fertilisation

Answer: 2. It is oviparous

Question 4. Which of the following is not a viviparous animal?

1. Rat
2. Lizard
3. Rabbit
4. Cat

Answer: 2. Lizard

NCERT Solutions for Reproduction in Animals Chapter 6

Question 5. Tadpole is the larva of

1. Fish
2. Frog
3. Mosquito
4. Butterfly

Answer: 2. Frog

Question 6. Baby, before being born, is termed as

1. Embryo
2. Foetus
3. Zygote
4. Egg

Answer: 2. Foetus

Question 7. Reproduction by budding takes place in

1. Hydra
2. Moeba
3. Paramecium
4. Bacteria

Answer: 1. Hydra

MCQs for Reproduction in Animals Chapter 6 Class 8

Question 8. Reproduction by binary fission occurs in

1. Hydra
2. Amoeba
3. Cloning
4. Hatching

Answer: 2. Amoeba

Question 9. The production of an exact copy of an animal by asexual reproduction is known as

1. Budding
2. Mating
3. Cloning
4. Hatching

Answer: 3. Cloning

Question 10. Sexual reproduction begins with

1. Implantation
2. Fertilisation
3. Zygote formation
4. Development of the embryo

Answer: 2. Fertilisation

Question 11. The process of internal fertilisation differs from external fertilisation as

1. The fusion of sperm and ovum takes place inside the female body
2. Fusion of sperm and ovum takes place in the ovaries
3. Gametes are produced inside the bodies of the parents
4. Either of the gametes is released outside the body of the parents

Answer: 1. The fusion of sperm and ovum takes place inside the female body

NCERT Solutions for MCQs on Reproduction in Animals

Question 12. Which example correctly depicts the difference between a viviparous and an oviparous animal, respectively?

1. Cats directly give birth to a young one, while hens lay eggs
2. Frogs lay soft-shelled eggs, while birds lay hard-shelled eggs
3. Frogs lay unfertilized eggs in the water, while hens lay fertilised eggs
4. Dogs give birth to many puppies, while elephants give birth to just one calf

Answer: 1. Cats directly give birth to a young one, while hens lay eggs

Question 13. Select the animal which undergoes metamorphosis during its life cycle.

1. Dog
2. Cat
3. Hen
4. Tadpole

Answer: 4. Tadpole

Question 14. The multicellular organism which reproduces by budding is

1. Amoeba
2. Yeast
3. Paramecium
4. Hydra

Answer: 4. Hydra

NCERT Solutions For Class 8 Science Chapter 3 Coal And Petroleum Multiple Choice Questions

Question 1. The purest form of carbon is________.

1. Coal
2. Charcoal
3. Coke
4. All of these

Answer: 3. Coke

Question 2. Naphthalene balls are obtained from coal tar and are used as__________.

1. Mosquito repellant
2. Honey bee repellent
3. Moth repellant
4. Snake repellant

Answer: 3. Moth repellent

NCERT Solutions for Coal and Petroleum MCQs Class 8

Question 3. A byproduct obtained after processing coal is useful in manufacturing plastics, synthetic dyes, naphthalene balls, etc. The byproduct is ____________.

1. Coal gas
2. Coal tar
3. Coke
4. Paraffin Wax

Answer: 4. Paraffin Wax

Question 4. Petroleum was formed from organisms

1. Living on the land
2. Living on the plants
3. Living on the rocks
4. Living on the rocks

Answer: 1. Living on the land

NCERT MCQs for Coal and Petroleum Class 8

Question 5. Which of the following is not a constituent of petroleum?

1. Paraffin wax
2. Lubricating oil
3. Petrol
4. Coke

Answer: 4. Coke

NCERT Solutions for Chapter 3 Coal and Petroleum MCQs

Question 6. Which petroleum product is used to run heavy motor vehicles?

1. Petrol
2. Diesel
3. Natural gas
4. Bitumen

Answer: 2. Diesel

Question 7. The slow process by which the plants and trees buried deep under the Earth get converted to coal is caused

1. Carboration
2. Carbonisation
3. Carbocation
4. Carbonation

Answer: 2. Carbonisation

Question 8. Choose the correct statement from the following.

1. It is difficult to transport natural gas through pipes
2. The disadvantage of natural gas is that it cannot be used directly for burning in homes
3. Natural gas is stored under high pressure as compressed natural gas
4. Natural gas cannot he used for power generation

Answer: 3. Natural gas is stored under high pressure as compressed natural gas

Question 9. Coal is a _____ fuel.

1. Clean
2. Flammable
3. Combustible
4. non-combustible

Answer: 3. Combustible

NCERT Solutions for Coal and Petroleum MCQs Class 8

Question 10. The resources which are obtained from nature are called _______.

1. Natural resources
2. Man-made resources
3. Renewable resources
4. Inexhaustible resources

Answer: 1. Natural resources

CBSE Class 8 Science Chapter 3 MCQ questions

Question 11. Dead remains of living organisms that got burned under the soil, thousands of years ago, are called _______.

1. Petroleum
2. Natural Gas
3. Fossils
4. Coke

Answer: 3. Fossils

Question 12. When coal is heated in air, it produces ______.

1. Carbon monoxide
2. Carbon dioxide
3. Nitrogen gas
4. Oxygen gas

Answer: 2. Carbon dioxide

Coal and Petroleum Chapter 3 MCQs Class 8 NCERT Solutions

Question 13. Naphthalene balls are used to repel moths and other insects. It is made up of________.

1. Coal gas
2. Coal tar
3. Petroleum
4. Natural gas

Answer: 2. Coal tar