set 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 2 EXERCISES
The following question based on force of gravity, solids and fluids topic of general science mcq
(a) Frictional force acts on the body.
(b) Only upward force acts on the body.
(c) Only weight of the body acts on it.
(d) Net upward force is equal to the net downward force.
The correct answers to the above question in:
Answer: (d)
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Question : 1
Assertion (A) :
A beaker filled with water at 4°C overflows if the temperature is decreased or increased.
Reason (R) :
Density of water is maximum at 4°C.
a) A is true but R is false
b) Both A and R are true but R is not a correct explanation of A
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 : 2
Match the Column I and Column II.
Column I | Column II |
A. Weight | 1. Minimum |
B. gequator | 2. Zero |
C. gpoles | 3. Vector |
D. gcentre | 4. Maximum |
a) (A) → (3) ; (B) → (1) ; (C) → (4) ; (D) → (2)
b) (A) → (2) ; (B) → (2) ; (C) → (4) ; (D) → (3)
c) (A) → (2) ; (B) → (1) ; (C) → (3) ; (D) → (4)
d) (A) → (4) ; (B) → (3) ; (C) → (1) ; (D) → (2)
Answer »Answer: (a)
Question : 3
The weight of a body is 9.8 N at the place where g = 9.8 ms–2. Its mass is
a) 10 kg
b) 9.8 kg
c) zero
d) 1 kg
Answer »Answer: (d)
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.
a) A is true but R is false
b) Both A and R are true but R is not a correct explanation of A
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: (a)
Question : 5
Assertion (A)
Gravitational attraction is a central force and therefore in motion of planets in the solar system, the angular momentum is conserved.
Reason (R)
In the motion of planets of the solar system, equal areas are swept in equal time.
a) A is true but R is false
b) Both A and R are true but R is not the correct explanation of A
c) Both A and R are ture and R is the correct explanation of A
d) A is false but R is true
Answer »Answer: (c)
Question : 6
A liquid rises to a certain length in a capillary tube. The tube is inclined to an angle of The length of the liquid column will
a) remain unchanged
b) decrease
c) increase
d) first decrease and then increase
Answer »Answer: (a)
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