Q:

Which of the following statements is true?

The velocity of sound is :

A) less in summer than in winter	B) same in winter and summer
C) independent of seasons	D) more in summer than in winter

Answer & Explanation Answer: D) more in summer than in winter

Explanation:

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Filed Under: Physics
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3 59916

Q:

Which of the following represents a relation for ‘heat lost = heat gained’?

A) Principle of thermal equilibrium	B) Principle of colors
C) Principle of calorimetry	D) Principle of vaporization

Answer & Explanation Answer: C) Principle of calorimetry

Explanation:

Heat lost by hot object = Heat gained by cold object

where we ignore heat gained or lost from/to the surroundings.

The study of heat gained and lost in this manner is often called Calorimetry.

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1 59910

Q:

In September 2017, who launched ‘Pradhan Mantri LPG Panchayat Yojna’?

A) Narendra Modi	B) Dharmendra Pradhan
C) Piyush Goyal	D) R.K. Singh

Answer & Explanation Answer: B) Dharmendra Pradhan

Explanation:

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0 59909

Q:

Which country’s Mars Digger probe named the ‘Mole’ was declared dead recently?

A) USA	B) Israel
C) UAE	D) China

Answer & Explanation Answer: A) USA

Explanation:

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Q:

The place of origin of an earthquake is called

A) Epicentre	B) Seismal
C) Focus	D) Amphidromic Point

Answer & Explanation Answer: C) Focus

Explanation:

The_place_of_origin_of_an_earthquake_is_called1556255800.jpg image

The point or place of origin of an earthquake is called Focus.

And,

The point where the seismic waves reach the surface is called as Epicenter.

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212 59866

Q:

In December 2017, which Ministry launched a pilot project ‘Blue Flag’?

A) Ministry of Home Affairs	B) Ministry of Health and Family Welfare
C) Ministry of Environment, Forest and Climate change	D) Ministry of Tourism

Answer & Explanation Answer: C) Ministry of Environment, Forest and Climate change

Explanation:

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Q:

Which country is resettling its refugees in the Bhashan Char Island?

A) Bangladesh	B) China
C) Sri Lanka	D) Nepal

Answer & Explanation Answer: A) Bangladesh

Explanation:

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Q:

n is an integer chosen at random from the set

{5, 7, 9, 11 }

p is chosen at random from the set

{2, 6, 10, 14, 18}

What is the probability that n + p = 23 ?

A) 0.1	B) 0.2
C) 0.25	D) 0.3

Answer & Explanation Answer: A) 0.1

Explanation:

Each of the integers in the first set could be combined with any from the second set, giving a total of 4 x 5 = 20 possible pairs.

Of these the combinations that could give a sum of 23 are (5 + 18), and (9 + 14)

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