Question # 1

Which is not considered as pollutant

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O₃

CO₂

NO₂

SO₂

Which one of the followings has polar covalent bonds hut is overall nom-polar molecule:

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HF

CO₂

CH₄

N₂

There are three different substances argon hydroiodic acid and hydroiodic acid.

the correct sequence in which the boiling point increases is:

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HI > Ar > HCI

Ar < HCI < HI

HI > HCI > Ar

HCI < HI < Ar

Octyl acetate has the flavor of

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Orange

Pineapple

Banana

Apple

Pressure remain constant at which temperature the volume of gas becomes twice of what it is at 0°C

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546 °C

546K

200°C

273K

Meniscus is the shape of the surface of a liquid in a cylindrical container:

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meniscus may be convex

meniscus is concave

meniscus may be convex or concave depending upon the nature of metal

meniscus is plane

The enzymes that bring about exchange of functional groups like phosphate are called

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Ligases

Lyases

Isomerases

Transferases

If volume of an ideal gas at 0C° 536cm3, what is volume at 1°C

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373 cm3

646 cm3

Becomes 0cm3

746 cm3

Cellulose is the polymer of

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α-D-glucose

β-D-glucose

Fructose

None

In MgCl2, the oxidation state ofCI is

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Zero

-2

+2

-1

Zn has

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Zero unpaired electrons

Three unpaired electrons

Five unpaired electrons

One paired electrons

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

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It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is non reactive chemically

Micro-nutrients are required in quantity ranging from

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4g-40g

6g-200g

6Kg-200Kg

4Kg-40Kg

Which of the following is lighter

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Li

k

Na

Ca

Orbital having same energy is called:

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Hybrid orbital.

Valence orbital.

Degenerate orbital.

D-orbital.

2.5 faradays of electricity is passed through solution of CuSO_{4. The number of gram equivalents of copper deposited on the cathode would be}

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1

2

2.5

1.25

Polyester resins have special use in:

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Clothing

Paints

Emulsion

Floor covering

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32 g

3.2 g

5.6 g

9.6 g

Denaturation of protein means the structure of protein is disrupted, indicate which factor foes not denature protein

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Heating protein

pH changes

Oxidising agent

Keeping pH 7.35

The molarity of solution containing 14.5 grams urea (N₂H₄CO) dissolved in 100 cm³of the solution is

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1 molar

0.1 molar

0.2 molar

0.25 molar

A carboxylic acid with one caboxyl group:

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Monocarboxylic acid

Dicarboxylic acid

Tricarboxylic acid

Polycarboxylic acid

The carbon, carbon bond length in benzene is

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1.54A°

1.34A°

1.20A°

1.39A°

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