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Which of these is true about the speed of sound through solids, liquids and gases?

Select the INCORRECT match.

AWater changing into - Evaporation water vapour on heating
BPurifying impure liquid by - Filtration straining
CWater vapour changing - Condensation into water on cooling
DUsed to separate immiscible liquids - Sedimentation

When two plane mirrors are inclined at an angle of 60°, the number of images formed is

A3
B4
C5
D6

Refer to the given Venn diagram and select the option which correctly identifies X, Y and Z.

Study the given flow chart.
Select the INCORRECT statement regarding P-S.


AP could breathe through spiracles whereas Q could breathe through lungs.
BR could be climbing bird whereas S could be perching bird.
CQ could possess webbed feet whereas S could possess talons.
DP could use its beak to sew leaves with material like thread and wool whereas R weaves the grass in and out rapidly.

Given below is a list of crops. How many of these are rabi and kharif crops respectively?

Study the given table.

Select the INCORRECT statement regarding P-S.

AP could be cold-blooded animal whereas R could be warm-blooded animal.
BQ could be six legged animal whereas R could be four legged animal.
CR could breathe through lungs whereas S could breathe through spiracles.
DP could have a pair of wings whereas Q could have two pairs of wings.

Which of the given statements about water cycle are correct?
(i) Water changes its state during the water cycle.
(ii) Heat of the Sun helps in the continuity of water cycle.
(iii) The two processes that enable the water cycle to repeat itself naturally are boiling and condensation.
(iv) The water cycle is the movement of water from the Earth to the sky and back to the Earth in a continuous way.

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

Read the given paragraph where few words have been italicised. Select the incorrect statement regarding it.
Teeth present in our mouth break food into smaller pieces. Each tooth is covered with a hard substance called enamel. Incisors are pointed teeth, used for grinding food into smaller pieces. Canines are chiselshaped teeth, used for piercing and tearing the food.
Premolars have flattened surface and there are six premolars in each jaw. Molars are used to grind food and each jaw has four molars.

AEnamel should not be replaced as it is mentioned correctly.
BThe positions of pointed and chisel-shaped should be interchanged.
CSix should be replaced by two and four should be replaced by eight.
DGrinding should be replaced by cutting and biting while piercing and tearing should not be replaced as it is mentioned correctly.

Refer to the given relationship.


ABalsam
BBean
COnion
DNeem