Q:

Which compound forms a colored aqueous solution?

A) CrCl3	B) KBr
C) CaCl2	D) NaOH

Answer & Explanation Answer: A) CrCl3

Explanation:

Colored aqueous solutions are a characteristic of transition compounds.

The only transition compound in the above choices is CrCl3.

Cr is a transition element.

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Q:

Which port is situated on the southern tip of the Suez Canal?

A) Port Suez	B) Port Said
C) Ismailia	D) Port Ibrahim

Answer & Explanation Answer: A) Port Suez

Explanation:

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Q:

Who invented fuel cells in 1839?

A) Buckminster Fuller	B) Sir William Grove
C) Sylvester Graham	D) Joyce Hall

Answer & Explanation Answer: B) Sir William Grove

Explanation:

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11 6071

Q:

On which day ' National Science Day ' is celebrated in India ?

A) February 23	B) February 25
C) February 26	D) February 28

Answer & Explanation Answer: D) February 28

Explanation:

National Science Day is celebrated in India on 28 February each year to mark the discovery of the Raman effect by Indian physicist Sir Chandrashekhara Venkata Raman on 28 February 1928.

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Q:

When a steel ball is placed on the surface of mercury, it does not sink because

A) of the surface tension of mercury	B) mercury is a semisolid
C) of the high viscosity of mercury	D) the density of mercury is greater than that of steel

Answer & Explanation Answer: D) the density of mercury is greater than that of steel

Explanation:

A solid sinks in a liquid if its density is greater than that of the liquid. if less, it floats

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Q:

'Zulfi, MyFriend ' is a book written by

A) Z.A. Bhutto	B) Md. Ali Jinnah
C) Khushwant Singh	D) Piloo Modi

Answer & Explanation Answer: D) Piloo Modi

Explanation:

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Q:

Wireless transmission can be done via

A) Infrared waves	B) Radio waves
C) Microwaves	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

Wireless transmission can be done via any of the Infrared waves, Radio waves or Microwaves.

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Q:

What building has the most stories?

Answer

A Libraury. It has more number of story books in it to read.

Workspace

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