Q:

Light travels in a straight line (rectilinear propagation of light). This statement does hold if the medium of travel for light is

A) of variable refractive index	B) made up of slabs of different refractive indices
C) homogeneous and transparent	D) inhomogeneous and transparent

Answer & Explanation Answer: C) homogeneous and transparent

Explanation:

In vacuum and in homogeneous, transparent media, such as air, water, and glass, light moves in a straight line. When light encounters a boundary between two different transparent media, some light is reflected and some moves from the first into the second medium.

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Q:

The swift movement of the falling water droplets along with the rising air create lightning and sound. It is this event that we call a ________________.

A) thunderstorm	B) hail
C) twister	D) cloudburst

Answer & Explanation Answer: A) thunderstorm

Explanation:

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Q:

Which of the following is not soluble in water?

A) sodium chloride	B) potassium sulfate
C) copper(II) hydroxide	D) silver nitrate

Answer & Explanation Answer: B) potassium sulfate

Explanation:

We know that,

All nitrates are soluble in water.

All chlorides are soluble in water with the exception of those formed with silver , lead , mercury ions as all halides are soluble.

Sulphates are soluble in water.

Hydroxides are not soluble in water.

Hence, copper(II) hydroxide is not soluble in water.

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Q:

After removing two electrons from helium atom it become?

A) UV rays	B) Alpha particle
C) Gama particle	D) X rays

Answer & Explanation Answer: B) Alpha particle

Explanation:

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Q:

Credit of developing polio vaccine goes to

A) J.L. Baird	B) Selman Waksman
C) Both A & B	D) Jones Salk

Answer & Explanation Answer: D) Jones Salk

Explanation:

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Q:

Common styles of leadership include

A) Autocratic leadership	B) Transactional leadership
C) Democratic leadership	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

There are 9 common styles of leadership. They are:

Transformational leadership

Transactional leadership

Servant leadership

Autocratic leadership

Laissez-faire leadership

Democratic leadership

Bureaucratic leadership

Charismatic leadership.

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Q:

Zip files use what type of compression?

A) Lossless	B) Lossy
C) Any of the above	D) None of the above

Answer & Explanation Answer: A) Lossless

Explanation:

ZIP file is an archive file format that supports lossless data compression. Lossless is a fairly popular data compression method that is used in a number of different applications. Files can become corrupted when they are transferred over the internet in an uncompressed format. It enables devices to transmit or store the same amount of data in fewer bits.

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Q:

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

No beggar who comes(A)/to our doors(B)/goes back empty handed.(C)/No error(D)

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

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