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Mercury melts at -39°C and boils at 357°C. Alcohol melts at -115°C and boils at 78°C. At which temperature are both substances in liquid state?

A-49°C
B-15°C
C100°C
D360°C

Read the given statements and select the correct option.
Statement 1 : Concave mirrors are used in torches and car headlights.
Statement 2 : Concave mirrors converge the light of the bulbs of torches and car headlights to form a beam of light.

ABoth statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DStatement 1 is false but statement 2 is true.

Feeling the tremors of an earthquake, a scared resident of thirteenth floor of a multistoreyed building starts climbing down the stairs rapidly. Which hormone initiated this action?

A Oxytocin
B Thyroxine
C Adrenaline
D Progesterone

When air is passed through red hot coke, a gaseous fuel is produced. The name of this gaseous fuel and its composition are respectively

A Natural gas, CO + H₂
B Producer gas, N₂ + CO
C Water gas, H₂ + CO
D None of these.

Which of the following is not a structural adaptation?

A Forelimbs of penguin are modified into flippers for swimming.
B Fennec fox has large ears to help it lose excessive body heat which enables it to inhabit hot xeric habitats.
C Palatable viceroy butterfly mimics unpalatable monarch butterfly to elude its predators.
D Cane toad and hedgehog aestivate to escape harsh summers.

Match column I with column II and select the correct option from the given codes.


A a – (ii), b – (iii), c – (iv), d – (i)
B a – (i), b – (iv), c – (iii), d – (ii)
C a – (iii), b – (i), c – (iv), d – (ii)
D a – (iv), b – (ii), c – (i), d – (iii)

Read the given statements and select the correct option.
Statement 1 : A twisting funnel of wind with its narrow end towards the land is known as a tornado.
Statement 2 : A tornado develops from a bnbthunderstorm and rotates violently.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true but statement 2 is false.
D Statement 1 is false but statement 2 is true.

Read the given statements and select the correct option.
Statement 1 : If light from a laser torch is made to fall on a prism, then a band of seven colours are not observed.
Statement 2 : Laser torch gives out light of only one colour.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true but statement 2 is false.
D Statement 1 is false but statement 2 is true.

Refer to the given figure in which some organs are labelled as P, Q, R and S. Which of the following could be true for the labelled parts in a patient who is diagnosed with an unusual sickness wherein he is unable to digest any fat present in his food?


AThe cells of the wall lining of Q are not able to secrete HCl which activates fat digesting enzymes.
BDuct of P is blocked due to which bile cannot enter small intestine.
CR is unable to manufacture bile.
DMicrovilli are absent in S.

Rohit tried to push a wall but failed to do so. What can you conclude from this?

A Energy is not spent and work is not done.
B Energy is spent but work is not done.
C Energy is not spent but work is done.
D Energy is spent and work is done.