CBSE Class 10 Science Sample Paper 2015 Set C

1) If equal weights of oxygen and nitrogen are kept in separate containers at the same temperature then.

a) Both the containers have the same number of molecules.

b) More molecules are present in the oxygen container.

c) The pressure of the nitrogen container is greater than that of the oxygen container.

d) The pressure of the oxygen container is greater than that of the nitrogen container.

2) A boy is standing on a truck which is moving with constant speed along a straight road. On a day when wind is negligible, the boy throws a ball vertically up with some velocity. The ball comes back and falls

a) into boy’s hand

b) Behind the boy

c) In Front of the boy

d) Behind or in front of the boy depending on the speed of the truck and ball. 

3) If x√ 75= y √45 = z√15= 0 , then which of the statement is true

a) x + y = 2z b) x + y=3z c) x – y= 2z d) x – y = 3Z

4) The pressure at the bottom of the four vessels filled with water to the same level is P₁, P₂, P₃ and P₄ respectively. Then which of the following conclusion is correct.

a) P₁ > P₂> P₃ > P₄ b) P₁ < P₂< P₃ < P₄ c) P₁ = P₄ =P₂> P₃ d) P₁ = P₂= P₃ = P₄