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 9769

Q:

An element which is preserved under water is

A) sodium	B) sulphur
C) red phosphorus	D) white phosphorus

Answer & Explanation Answer: D) white phosphorus

Explanation:

White phosphorus undergoes spontaneous combustion when exposed to air. In order to prevent this spontaneous ignition, it is preserved under water.

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27 9765

Q:

The SQL keyword(s) ________ is used with wildcards.

A) LIKE only	B) IN only
C) NOT IN only	D) IN and NOT IN

Answer & Explanation Answer: A) LIKE only

Explanation:

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35 9762

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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13 9753

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 9740

Q:

"Doing Business Report" is prepared by which of the following organisations/agencies every year?

A) Asian Development Bank(ADB)	B) World Trade Organisation(WTO)
C) International Monetary Fund (IMF)	D) World Bank

Answer & Explanation Answer: D) World Bank

Explanation:

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38 9733

Q:

The National park ' Valley of Flowers' lies in the state of

A) Uttarakhand	B) Kerala
C) Jammu and Kashmir	D) Himachal Pradesh

Answer & Explanation Answer: A) Uttarakhand

Explanation:

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21 9731

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

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

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