Exams Questions and Answers

Q:

Computer programs are written in a high level programming language, however the human readable version of a program is called _______

A) Cache	B) Instruction set
C) Source code	D) None of these

Answer & Explanation Answer: C) Source code

Explanation:

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17 9817

Q:

Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at –6°C will be: (Kf for water = 1.86 Kg/mol and molar mass of ethylene glycol = 62 kg/mol)

A) 204.60 g	B) 304.30 g
C) 804.32 g	D) 400.00 g

Answer & Explanation Answer: C) 804.32 g

Explanation:

$∆ T_{f} = k_{f} . m$

for ethylene glycol in aq. solution

$∆ T_{f} = k_{f} \frac{w}{m o l . w t} \times \frac{1000}{w t . o f s o l v e n t} 6 = \frac{1.86 x w x 1000}{62 x 4000}$

=> w = 800 g

So, the weight of solute should be more than 800 g.

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8 9814

Q:

The leading state in producing paper is

A) Kerala	B) Odisha
C) Bihar	D) West Bengal

Answer & Explanation Answer: D) West Bengal

Explanation:

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Filed Under: Indian Geography
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20 9811

Q:

Orlon is a polymer of

A) Dacron	B) Acrylonitrile
C) Polyamide Nylon	D) None of the above

Answer & Explanation Answer: B) Acrylonitrile

Explanation:

The monomeric unit of orlon polymer is Acrylonitrile. Orlon is also known as Polyacrylonitrile (PAN).

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19 9806

Q:

Which one of the following is a natural colloid ?

A) Cane sugar solution	B) Blood
C) Sodium chloride solution	D) Urea solution

Answer & Explanation Answer: B) Blood

Explanation:

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26 9802

Q:

$17 \frac{4}{7} + 13 \frac{2}{12} - ? = 11 \frac{2}{3}$

A) 16	B) 17
C) 18	D) 19

Answer & Explanation Answer: D) 19

Explanation:

$17 \frac{4}{7} + 13 \frac{2}{12} - ? = 11 \frac{2}{3}$

$\frac{123}{7} + \frac{158}{12} - ? = \frac{35}{3}$

=> $? = \frac{123}{7} + \frac{158}{12} - \frac{35}{3}$

=> ? = $\frac{1476 + 1106 - 980}{84}$

=> ? = 19.07

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Filed Under: Simplification
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13 9794

Q:

88 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be ?

A) 112 mts	B) 84 mts
C) 96 mts	D) 108 mts

Answer & Explanation Answer: B) 84 mts

Explanation:

Vol of silver = ${πR}^{2} h$ = 66 C.C

Given D= 1mm => R = D/2 = 1/20 cm

=> $\frac{22}{7} \times {(\frac{1}{20})}^{2} \times h$ = 66

= 66 x 400 x (7/22) = 8400 cm = 84 mtrs.

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Filed Under: Volume and Surface Area
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11 9785

Q:

Most commonly used bleaching agent is

A) Chlorine	B) Alcohol
C) Carbon dioxide	D) Sodium Chloride

Answer & Explanation Answer: A) Chlorine

Explanation:

Chlorine is the most commonly used bleaching agent.

Bleaching agents are compounds which are used to remove color from substances such as textiles. A bleaching agent is a material that lightens or whitens a substrate through the chemical reaction. The bleaching reactions usually involve oxidative or reductive processes that degrade color systems.

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Filed Under: Chemistry
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10 9783

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