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) Surface tension
(b) Viscosity
(c) Upthrust of water
(d) Gravitational force
The correct answers to the above question in:
Answer: (a)
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Read more physical properties of materials Based General Science Questions and Answers
Question : 1
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)
Question : 2
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 : 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
The density of water will reach its maximum value at the temperature of
a) 4°C
b) 50°C
c) 0°C
d) 100°C
Answer »Answer: (a)
Question : 5
The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied ?
a) Length = 100 cm, diameter = 1 mm
b) Length = 50 cm , diameter = 0.5 mm
c) Length = 200 cm, diameter = 2 mm
d) Length = 300 cm, diameter = 3 mm
Answer »Answer: (b)
Y=$\text"T/A"/\text"Δl/l"$
$Δl={T×l}/{A×Y}=T/Y×l/A$
Hence, $T/Y$ is constant. Therefore, $Δl = l/A$
$l/A$ is the largest in the first case.
Question : 6
While lifting a bucket of water from a well, we feel that the bucket
a) Becomes lighter above the surface of water
b) Loses stability on coming out of the water
c) Becomes heavier above the surface of water
d) Has gained mass on coming out of water
Answer »Answer: (c)
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