Q:

Select the related word/letters/number from the given alternatives.

7 : 19 :: 10 : ?

A) 25	B) 30
C) 21	D) 23

Answer & Explanation Answer: A) 25

Explanation:

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Q:

What is the full form of "RADAR" ?

A) Radio Detecting and Ranging	B) Region Device and Ranging
C) Radio Detect and Rangs	D) Radio Device and Ranging

Answer & Explanation Answer: A) Radio Detecting and Ranging

Explanation:

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Q:

The symbols used in an assembly language are called ?

A) Assembler	B) Mnemonics
C) Codes	D) All of the above

Answer & Explanation Answer: B) Mnemonics

Explanation:

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Q:

Computer networks constituting the internet are connected by telephones, underwater cables and _____________

A) e-mail	B) e-books
C) Public telephone booths	D) Satellites

Answer & Explanation Answer: D) Satellites

Explanation:

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Q:

The fundamental particles present in equal numbers in neutral atoms are

A) protons and electrons	B) neutrons and electrons
C) protons and neutrons	D) protons and positrons

Answer & Explanation Answer: A) protons and electrons

Explanation:

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Q:

Which type of reaction occurs when carbon burns in oxygen to give carbo dioxide?

A) Addition reaction	B) Substition reaction
C) Combustion reaction	D) Decomposition reaction

Answer & Explanation Answer: C) Combustion reaction

Explanation:

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Q:

Which of the following carbon compounds is used as a fire- extinguisher?

A) Carbon disulphide	B) Chloroform
C) Carbon tetrachloride	D) Methyl ene chloride

Answer & Explanation Answer: C) Carbon tetrachloride

Explanation:

Vapour of carbon tetra chloride $(c c l_{4})$ is non-inflammable and is heavier than air. Hence it is used as a fire extinguisher under the trade name of pyrene.

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Q:

The outer electron configuration of Gd (Atomic No : 64) is

1. $4 f^{7} 5 d^{1} 6 s^{2}$

2. $4 f^{3} 5 d^{5} 6 s^{2}$

3. $4 f^{8} 5 d^{0} 6 s^{2}$

4. $4 f^{4} 5 d^{4} 6 s^{2}$

Answer

Answer : 1

Sol :

1. $4 f^{7} 5 d^{1} 6 s^{2}$

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