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
Exam Prep: AIEEE

8 9170

Q:

Amrita Pritam's work " A Revenue Stamp" is

A) A book of stories	B) A novel
C) A biography	D) An autobiography

Answer & Explanation Answer: D) An autobiography

Explanation:

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Filed Under: Books and Authors

23 9170

Q:

Which is the point from where an azimuth originates?

A) South	B) North
C) East	D) West

Answer & Explanation Answer: B) North

Explanation:

The azimuth originates at true North i.e, the azimuth originates from the north point. It is a measure of how far an object forms the observer's north point.

Azimuth is a technical mapping term which is used to describe the direction of an angle between north and south on a compass circle through which the circle line passes. It is the most common military method to express direction. When using an azimuth, the point from which the azimuth originates is the center of an imaginary circle.

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Filed Under: Physics
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8 9167

Q:

Which country recently signed an order to allow Transgender persons to serve in Military roles?

A) India	B) United States
C) New Zealand	D) Singapore

Answer & Explanation Answer: B) United States

Explanation:

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Filed Under: General Awareness
Exam Prep: Bank Exams

2 9164

Q:

Japan invaded Manchuria in 1931 because

A) Japan wanted to take back lands that belonged to it	B) Manchuria had refused to make peace with Japan
C) Manchuria had invaded Japan during World War I	D) Japan wanted raw materials and natural resources

Answer & Explanation Answer: D) Japan wanted raw materials and natural resources

Explanation:

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Filed Under: World History
Exam Prep: Bank Exams

2 9157

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

13 9156

Q:

In which of the following fields was Prof. Richard H. Thaler awarded the Nobel Prize 2017?

A) Physics	B) Chemistry
C) Literature	D) Economics

Answer & Explanation Answer: D) Economics

Explanation:

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Filed Under: Indian Economy
Exam Prep: Bank Exams

0 9154

Q:

Guess the Missing number in the Number Challenge ?

A) 8	B) 32
C) 44	D) 64

Answer & Explanation Answer: D) 64

Explanation:

The logic in the challenge is

$\sqrt{81} x 6 = 9 x 6 = 54$

$\sqrt{144} x 7 = 84$

Similarly, $\sqrt{64} x 8 = 8 x 8 = 64$ .

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Filed Under: Math Puzzles
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21 9153

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