set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 2 EXERCISES
The following question based on physical properties of materials topic of general science mcq
(a) b
(b) a
(c) c
(d) d
The correct answers to the above question in:
Answer: (a)
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Question : 1
The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. Why? Following are some options
a) Since, the surface of the lake is at the same temperature as the air, no heat is lost
b) The density of water is maximum at 4°C
c) Ice is a bad conductor of heat
d) None of the above
Answer »Answer: (b)
Question : 2
Assertion (A):
When a ship enters a sea from a river, it rises a little.
Reason (R):
The density of sea water is greater than that of river water.
In the context of the above statements, which of the following is true?
a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
b) (A) is true, but (R) is false
c) Both (A) and (R) are true and (R) is the correct explanation of (A)
d) (A) is false, but (R) is true
Answer »Answer: (c)
Question : 3
The maximum density of water is at
a) 277 Kelvin
b) 273 Kelvin
c) 373 Kelvin
d) 269 Kelvin
Answer »Answer: (a)
Question : 4
Assertion (A):
An iron ball floats on mercury but gets immersed in water.
Reason (R):
The specific gravity of iron is more than that of mercury.
Code
a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
b) (A) is true, but (R) is false
c) Both (A) and (R) are true and (R) is the correct explanation of (A)
d) (A) is false, but (R) is true
Answer »Answer: (b)
Question : 5
Mobiles and Automobiles have brought about a revolution in the social life of Indians, especially in the rural, in terms of
- Mobility of the people
- Connectivity of the people
- Sensitivity of the people
a) Only 1 and 3
b) Only 2 and 3
c) Only 1 and 2
d) 1, 2 and 3
Answer »Answer: (c)
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