2921: Which one of the following metals does not form amalgams ?
(a) Zinc
(b) Copper
(c) Magnesium
(d) Iron
2922: What happens when the temperature of water falls from 30°C and 0°C?
(a) The volume of ice formed will be less than volume of water
(b) The volume of ice formed will be more than the volume of water
(c) Water will not freeze at 0°C
(d) None of the above
2923: The graph of 2x + 3y = 12 intersects Y-axis at the point:
(a) (0, 4)
(b) (0, 6)
(c) (4, 0)
(d) (6, 0)
2924: Assertion (A):
A diamond sparkles more than a glass imitation cut to the same shape.
Reason (R):
The refractive index of diamond is less than that of glass.
In the context of the above two statements, which one of the following is correct ?
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
2925: The language spoken by the largest number of people in the world is
(a) Hindi
(b) English
(c) Mandarin
(d) Spanish