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The given table shows the degree of angular movement shown by three different skeletal joints X, Y and Z.

Which of the following statements is correct regarding this?

(A) Joint X can be the joint between shoulder bone and arm.

(B) Joint Y can be the elbow joint.

(C) Joint Z can be the joint between upper jaw and rest of the skull.

Light rays undergo regular reflection at ________.

(A) A piece of cloth

(B) The Moon surface

(C) A whitewashed wall

In an experiment, hydrochloric acid was reacted with calcium carbonate at room temperature and pressure. If 80 cm³ of gas X was produced then, the number of molecules and mass of gas X given off are respectively


A 3.33 × 10^-3, 0.5 g
B 2.15 × 10²¹, 0.157 g
C 6 × 10²³, 7.5 g
D 4 × 10²¹, 1.5 g

Study the given Venn diagram.

Following statements represent the causes of different kinds of pollution. Which of the following statements hold true for the given Venn diagram?
(i) Factory discharge coming out of a chimney can be included in R.
(ii) Construction work going on at a building site can be included in Q.
(iii) Youngsters dancing in a disco can be included in O.
(iv) Vehicles moving on roads can be included in O.

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

The number of 'molars' in each jaw is ________.

(A) Twelve

(B) Six

(C) Eight

P is the state of matter that changes into state Q on cooling and changes into state R on heating. Select the option that correctly identifies the character of P, Q and R.

Select the correct option regarding the given figure, if alphabet 'P' represents the star at the centre of our solar system.


AIf Q is Mars then the number of R around it will be 2.
BIf Q is Venus then the number of R around it will be 3.
CIf Q is Jupiter, then the number of R around it will be 58.
DIf Q is Neptune, then the number of R around it will be 0.

Oscillations are set in a simple pendulum whose length is 2 m and mass of the bob is 2 kg. Its time period

A Is always constant
B Increases slowly
C Decreases slowly
D First increases then decreases.

In the following four groups of plant parts used as food, one member is odd one out. Select the option in which the odd member is encircled INCORRECTLY?

A Wheat, Maize, , Bajra
B Arhar, , Moong, Rajma
C , Sugarcane, Potato, Ginger
D , Coriander, Methi, Sugarcane

Refer to the given Venn diagram.

Select the correct option regarding P, Q, R, S and T.

AS could be a rose plant whereas P could be a potato plant.
BQ could be Bryophyllum and T could be strawberry.
CR could be a fern or an alga.
DQ could be spinach and P could be colocasia.