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Two objects A and B are moving on rough surface as shown in figure. Object A has greater velocity than B then


A A experiences more frictional force than B
B B experiences more frictional force than A
C Both experience same frictional force
D Cannot be said because data is insufficient.

When we walk on sand our feet sink into it and it is difficult for us to walk but a camel can easily walk on sand because
(i) The weight of the camel is the force that is spread over the large area covered by its feet.
(ii) The pressure exerted by the camel’s body on the sand is very large.

A Only (i) is correct.
B Only (ii) is correct.
C Both (i) and (ii) are correct and (ii) is the conclusion of (i).
D Both (i) and (ii) are correct and (i) is the conclusion of (ii).

The surface area of the base of a brick X is 100 cm². The surface area of the base of the brick Y is 250 cm². Each brick weighs 100 N. Which of the following is correct if P₁ and P₂ are the pressures exerted by the bricks X and Y respectively?

A P₁ = P₂
B P₁ > P₂
C P₁ < P₂
D P₁ = P₂ = 0

Select the INCORRECT match.

What does the given picture show?

A Humans need food.
B Humans breathe in air.
C Humans grow up.
D Humans need clothes.

Which of the following options is exactly embedded in Fig.(X)?



A

B

C

D

The given figure shows the petroleum deposit inside the earth’s crust.

Which of the following is correct with respect to substance X?
I. X is chiefly made up of methane.
II. X is stored under low pressure.
III. X is a clean, non-polluting fuel.

A I and III
B II and III
C I and II
D None of these

In fractionating column, various fractions are obtained at various heights of the column. As the vapours reach at a height where temperature is equal to or just below the boiling point of that fraction, it will

A Condense to form a liquid
B Remain in gaseous state
C Condense to form a solid
D Escape from the column.

Which of the following statements are correct?
(I) Coal, petroleum and natural gas are called fossil fuels.
(II) Coal and natural gas are exhaustible substances.
(III) CNG is more polluting than petrol.
(IV) Coke is used in the manufacture of steel.

A I and II only
B II and IV only
C I, III and IV only
D I, II and IV only

Different components of petroleum are separated by fractional distillation. What is the correct sequence of fractions obtained in the fractionating column from top to bottom?

A Petroleum gas, lubricating oil, kerosene, gasoline.
B Kerosene, petroleum gas, lubricating oil, gasoline.
C Petroleum gas, gasoline, kerosene, lubricating oil.
D Gasoline, kerosene, petroleum gas, lubricating oil.