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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Filed Under: Chemistry
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Q:

Expansion cards are inserted into

A) Peripheral Devices	B) Pegs
C) Slots	D) The back of the computer

Answer & Explanation Answer: C) Slots

Explanation:

In computing, the expansion card or board or accessory card is a printed circuit board that can be inserted into an electrical connector or expansion slot, on a computer motherboard, to add functionality to a computer system via the expansion bus.

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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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Q:

In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is

1) $A_{2} B_{5}$

2) $A_{3} B_{2}$

3) $A_{2} B_{3}$

4) $A_{3} B_{4}$

A) Option 1	B) Option 2
C) Option 3	D) Option 4

Answer & Explanation Answer: A) Option 1

Explanation:

$Z_{A} = \frac{8}{8}$ ; $Z_{B} = \frac{5}{2}$

So formula of compound is $A B_{\frac{5}{2}}$

i.e., $A_{2} B_{5}$ .

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Filed Under: Chemistry
Exam Prep: AIEEE

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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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Filed Under: Physics
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Q:

Rajya Sabha can delay the Finance Bill sent for its cosideration by the Lok Sabha for a minimum period of _____

A) one year	B) one month
C) Fourteen days	D) seven days

Answer & Explanation Answer: C) Fourteen days

Explanation:

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Filed Under: Indian Politics

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Q:

In 1990 a person is 15 years old. In 2000 that same person is 5 years old. How can this be possible?

Answer

It can be possible in only B.C. i.e, Before Christ. That was about 2000 years ago.

Given,

In 1990 B.C = 2000 + 1990 = 3990 years ago, a person is 15 years Old

=> In 1995 B.C = 2000 + 1995 = 3995 years ago, the same person will be 10 years Old

Therefore, In 2000 B.C = 2000 + 2000 = 4000 years ago, the same person will be 5 years Old.

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Q:

You organize files by storing them in

A) Lists	B) Archives
C) Folders	D) Indexes

Answer & Explanation Answer: C) Folders

Explanation:

Files are organised and stored in folders.

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