Q:

Consider the following statements :

1. There is no net moment on a body which is in equilibrium.

2. The momentum of a body is always conserved.

3. The kinetic energy of an object is always conserved.

Which of the statements given above is/are correct?

A) 1, 2 and 3	B) 2 and 3 only
C) 1 and 2 only	D) 1 only

Answer & Explanation Answer: C) 1 and 2 only

Explanation:

There are two conditions that must be met for an object to be in equilibrium. The first condition is that the net force on the object must be zero for the object to be in equilibrium. If net force is zero, then net force along any direction is zero.

Kinetic energy (KE) is the energy of motion, and kinetic energy is not always conserved in a collision

Energy and momentum are always conserved.

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Filed Under: Physics
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2 44578

Q:

The most reactive of the following metals is

A) Al	B) Ca
C) Ni	D) Pb

Answer & Explanation Answer: B) Ca

Explanation:

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Filed Under: Chemistry
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1 44573

Q:

Arrange the following ina proper sequence.

A. Mutation

B. Reproductive isolation

C. Natural selection

D. Evolution

A) D,C,B,A	B) C,B,A,D
C) A,C,D,B	D) A,B,C,D

Answer & Explanation Answer: D) A,B,C,D

Explanation:

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Filed Under: Biology
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Q:

By volume, 21% of air is _______________.

A) hydrogen	B) oxygen
C) nitrogen	D) carbon dioxide

Answer & Explanation Answer: B) oxygen

Explanation:

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Q:

Which state cabinet has approved Dharma Swatantrya (Religious Freedom) Bill 2020?

A) Telangana	B) Rajasthan
C) Madhya Pradesh	D) Andhra Pradesh

Answer & Explanation Answer: C) Madhya Pradesh

Explanation:

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Filed Under: Indian Politics
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Q:

Which planet has the most volcanoes in our solar system?

A) Jupiter	B) Venus
C) Saturn	D) Neptune

Answer & Explanation Answer: B) Venus

Explanation:

Venus has the most number of volcanoes than any other planet in the solar system.

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Filed Under: General Science
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1 44425

Q:

Which of the following pairs is INCORRECT?

I. Haematite : Iron

II. Pitchblende : Copper

III. Monazite : Thorium

A) Only I	B) Only II
C) Only I and Only II	D) Only I and Only III

Answer & Explanation Answer: B) Only II

Explanation:

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Q:

Which one of the following is commonly used as an indicator to measure the exact pH?

A) Eosin	B) Phenolphthalein
C) Universal indicator	D) Litmus

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