Q:

Which one of the following is the most characteristic property of an element?

A) Density	B) Boiling point
C) Mass number	D) Atomic number

Answer & Explanation Answer: D) Atomic number

Explanation:

Atomic number is the fundamental properties of an element. Every atom is identified by its unique atomic number. Atomic number is equal to the number of protons present in an atom of the element.

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Filed Under: Chemistry
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Q:

A ball is thrown vertically upwards. Assuming the air resistance to be constant and cosiderable:

A) the time of ascent < the time of descent	B) the time of ascent > the time of descent
C) the time of ascent = the time of descent	D) none of these

Answer & Explanation Answer: A) the time of ascent < the time of descent

Explanation:

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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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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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Q:

What is the location of India's first elevated Urban Expressway?

A) Mumbai to Pune	B) Delhi to Gurugram
C) Chennai to Bengaluru	D) Lucknow to Allahabad

Answer & Explanation Answer: B) Delhi to Gurugram

Explanation:

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Q:

Rearrange the parts of the sentence in correct order.

Gone are the days

P-about foreign trade and payments
Q-and not really worried
R-when we could think of ourselves as a closed economy

A) QRP	B) RQP
C) PRQ	D) PQR

Answer & Explanation Answer: B) RQP

Explanation:

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Filed Under: English
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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.

Workspace

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Subject: Networking
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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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