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Wool required for making woollen socks, gloves, jackets, etc. is obtained from

A
B
C
DAll of these.

A child is sitting on a plank attached to a thick steel pillar which is turning at a constant rate in anticlockwise sense as shown in the given figure.
Which option correctly states and explains the direction of friction acting on the child at a given instant?


ATowards P, to counter centripetal force.
BTowards Q, to counter centripetal force.
CTowards Q, to provide centripetal force.
DTowards P, to provide centripetal force.

Select the correct statements.
(i) Tremors that follow massive earthquakes are called aftershocks.
(ii) Mt. Etna is a dormant volcano.
(iii) Earthquake is measured on the Vernier scale.
(iv) Breaking of dam can cause floods.

A(i) and (ii) only
B(i) and (iv) only
C(ii) and (iv) only
D(ii) and (iii) only

Identify X in the given pie chart of composition of air and select the option that correctly fills the following blank.

X component of atmospheric air helps in _______.
(i) Maintaining water cycle of the environment
(ii) Respiration
(iii) Photosynthesis
(iv) Extinguishing fire
(v) Formation of fog
(vi) Burning of candles

A(ii) and (vi) only
B(i), (ii) and (iii) only
C(i), (iii), (iv) and (v) only
D(ii), (iv) and (vi) only

Refer to the given classification chart where plants have been classified based on plant parts from which they propagate vegetatively.

Select the option that correctly identifies the plants that can be placed at X, Y and Z respectively.

ADahlia, Zamikand, Kalanchoe
BMint, Tapioca, Onion
CGarlic, Colocasia, Water hyacinth
DAsparagus, Begonia, Ginger

Which of the following statements are incorrect?
I. Some metals react with acids to give off carbon dioxide gas.
II. Hydrogen turns lime water milky.
III. Zinc carbonate contains zinc and carbon only.
IV. Sour milk contains malic acid.

AI and III only
BII and IV only
CII and III only
DI, II, III and IV

In the given figure, a boy is pushing the large box from right to left. If the boy and the box are at rest then, the force of friction will act on the boy


AFrom right to left (←)
BFrom left to right (→)
CVertically downwards (↓)
DVertically upwards (↑)

Study the given equation of photosynthesis. Identify X, Y and Z and select the INCORRECT statement.

I. X is the gas which constitutes 21% of air in the atmosphere.
II. Y represents the pigment present in leaves of the plant.
III. Z is the gas which turns lime water milky.
IV. X is the gas which extinguishes fire.

AI and III only
BII and IV only
CI, II and III only
DI, II, III and IV

Study the given flow chart and identify W, X, Y and Z.

Which of the following shows an arrangement of particles in a matter, filled inside the balloon?

A
B
C
DNone of these