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Which of the following process of water cycle involves radiation?

ACondensation
BEvaporation
CPercolation
DRunoff

A low-pressure condition is formed during cyclones over a region because of

Arelease of heat by air
Brelease of heat by water vapour
Cabsorption of heat by land surface
Dabsorption of heat by water vapour

An astronaut is in a space station in an environment which has no acceleration due to gravity. The space station has a generator which constantly heats up the air on one side of the cabin. Which of the following statements is true about the convection currents caused by heating of air by the generator?

ACool air moves in, as the air heated by the generator rises up
BNo conventional convection currents are set up
CHot air, being heavy, merges into the ground and cool air moves in
DA vacuum sets up near the generator, as all the air is sucked by it

In the given figure who among the folowing is the primary consumer?


ASnake
BLion
CRabbit
DFrog

Which statement best describes the energy changes that occur while a child is riding on a sled down a steep, snow-covered hill?

AKinetic energy decreases and potential energy increases.
BKinetic energy increases and potential energy decreases.
CBoth potential energy and kinetic energy decrease.
DBoth potential energy and kinetic energy increase.

Find the mode and median of the given data:

12, 14, 12, 16, 15, 13, 14, 18, 19, 12, 14, 15, 16, 15, 16, 16, 15, 17, 13, 16, 16, 15, 15, 13, 15, 17, 15, 14, 15, 13, 15, 14

(A) 15, 15

(B) 17, 12

(C) 15, 18

Coal, petroleum and natural gas are fuels. Which of the following statements is false regarding these fuels?

A They are burnt to produce energy.
B They are found as solids and gases only.
C They release harmlful gases into the air when burnt.
D They are being used faster than they can be replaced.

The processes in the life cycle of a flowering plant are given here in random order.
a → Seeds develop
b → Flowers bloom
c → Seeds germinate
d → Flowers get pollinated
e → New plant grows
f → Seeds disperse
Select the option that arranges these processes in correct order.

A e → c → b → d → a → f
B c → e → b → d → a → f
C e → c → d → b → a → f
D c → e → d → b → f → a

Rahul took a solution of magnesium hydroxide and added excess of lemon juice to it. Which of the following statements are correct about the resulting solution?
It turns pink with phenolphthalein indicator.
2. It turns blue litmus red.
3. It is basic in nature.
4. The reaction takes place is neutralisation reaction.

A1 and 2
B3 and 4
C2 and 4
D1 , 2 and 3

What comes next in the given pattern ?

A, I, P, V, A, E,     ?    

(A) E

(B) F

(C) G