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 9161

Q:

Improve the bracketed part of the sentence.

If the screen (was any brighter), it would have been easier to read from the tablet.

A) was bright enough	B) was more brighter
C) had been brighter	D) no improvement

Answer & Explanation Answer: C) had been brighter

Explanation:

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Filed Under: English
Exam Prep: Bank Exams

0 9159

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 9159

Q:

A sector between the two longitude lines is known by which of the following name?

A) Belt	B) Gore
C) Time-block	D) Time box

Answer & Explanation Answer: B) Gore

Explanation:

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Filed Under: Indian Geography
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Q:

What is the main reason the OSI Model was created?

Answer

The OSI Model is used as a reference model.

The primary reason the OSI model was created was so that different networks could inter-operate. Hence, different networks could communicate.

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Subject: Networking
Job Role: Analyst , Bank Clerk , Database Administration , Network Engineer

20 9149

Q:

Correct answer for the given blank out of the four alternatives.

The main failings were of conception and a political willingness to settle _________ easy options. _______________ the expansive declarationsof the need "to maintain effective security of all nuclear materials, _______________ includes nuclear materials used in nuclear weapons”, thesummits narrowed their _______________ to civilian holdings __________________ nonnuclear weapon states.

_______________ includes nuclear materials used in nuclear weapons”

A) which	B) that
C) those	D) who

Answer & Explanation Answer: A) which

Explanation:

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Filed Under: English
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Q:

Missing letters puzzle

Answer

Answer: D

Explanation: The diagram contains 3 sets of 4 letters - one set of outer corner letters, one set of inner corner letters, and one set of letters on each side of the square. The numerical values of the letters in each set add up to 40.

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Subject: Missing letters puzzles

180 9146

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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