4121: Wisdom teeth normally grow during the age of:
(a) 34-----40 years
(b) 12-----15 years
(c) 17------30 years
(d) 40------45 years
4122: If a block of gold weighing 100 gm in air is immersed in water with a string tied to a spring balance, what could be the probable weight indicated by the spring balance?
(a) Less than 100 gm
(b) Equal to 100 gm
(c) More than 100 gm
(d) Double of 100 gm
4123: Despite having large reserves of coal, why does India import millions of tonnes of coal?
1. It is the policy of India to save its own coal reserves for future, and import it from other countries for the present use.
2. Most of the power plants in India are coal-based and they are not able to get sufficient supplies of coal from within the country.
3. Steel companies need large quantity of coking coal which has to be imported.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
4124: Neil Armstrong was the first person to reach on the moon. While walking on the moon:
(a) His mass remained the same but weight increased
(b) His mass remained the same but weight decreased
(c) His mass as well as weight decreased
(d) His mass increased but weight remained the same
4125: Examine the following three statements:
I. Processed meat is a perishable food.
II. All perishable foods are packed in sealed tins.
III. Sealed tins sometimes do not contain processed meat.
Which one of the following inferences can be drawn from the above statements?
(a) Sealed tins always contain perishable food
(b) Processed meat is sometimes not packed in sealed tins
(c) Processed meat is always packed in sealed tins
(d) Non-perishable foods are never packed in sealed tins