Question # 1

Which one of the following is NOT a nucleophile

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NH2+

BF3

H2O

CH3-

If the volume term is present in denominator of Kc expression, then which one is correct

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Increase in pressure will shift the reaction backward

Increase in pressure will shift the reaction forward direction

Decrease in volume will shift the reaction forward direction

Reaction will not effected

The transition temperature of tin is

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95.5 C°

13.2 C°

13.2°C

128.5°

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T₁= T₂= T₃

T₁< T₂< T₃

T₁> T₂> T₃

T₁> T₂= T₃

In voltaic cell a saht bridge is used in order to

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Pass the electric current

Prevent the flow of ions

Mix solutions of two half cells

Allow movement of' ions between two cells

What is the mass of 10²⁰molecules of CO₂at STP?

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7.3 x 10^-3g

7.9 x 10^-3g

3.2 x 10^-3g

4.9 x 10^-3g

Chloroform is carcinogenic:

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Heart

Lungs

Liver

Kidney

The most unsymmetrical one in crystal system is

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triclinic

Li, Na, K

monoclinic

hexagonal

A polymeric substance that is formed in the liquid state and then hardened to a liquid solid us called as:

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Fibre

Plastic

Varnish

Polyamide resin

Lithosphere has amount of silicon

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35.30%

27.72%

40.01%

21.13%

Which of the following undergoes easy dehydration?

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3-MethyIbutan-2-ol

Ethanol

2.Methylpropan-2-ol

Methanol

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

E.D.T.A is

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Mono-dentate

Bi-dentate

Polydentate

Having three lone pairs of electrons

Hydrocarbans, SO₂, CO, NH₃, nitrogen oxides and compounds of fluorine are called

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Primary pollutant

Secondary pollutant

Tertiary pollutant

None of these

10% aqueous solution of NaCI has molarity

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1.7 M

2.7 M

0.17 M

3.7 M

Activity of the enzyme is reduced by

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Temperature

Concentration

pH

Inhibitors

Which one of the following mixture shows positive deviation form Rault's law and forms an azetrope with minimum boiling point

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Methanol + CCI₄

Methanol + acetone

Ether + HCI

Acetone + chloroform

An oil or fat with no double bond have iodine number:

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Zero

100%

50%

minimum

The molecule of ethane possess which hybrization

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sp³

sp²

sp

sp²d

Formic Acid is obtained from Red out by:

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Distillation

Crystallization

Filtration

sublimation

Solubility cure of Na₂SO₄10H₂shows

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Constant increase of solubility

Constant decreases of solubility

Discontinuously solubility wit temperature

None of above

The organic compound, alcohols are much closer to, in structure and hence is also called its derivative:

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Water

Oxidizes of lithium oxides

Oxidizes of magnesium

Oxidizes of aluminium

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