Question # 1

Which one of the following alkanes will be formed by the hydrolysis of ethyl magnesium bromide

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Methane

Ethane

Butane

do not hydrolysed

Which substance shows very weak hydrogen bonding with water.

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Methanol

Ethanol

Diethyl ether

Benzene

The anhydride of HCIO4 is

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CIO3

CIO2

Cl2O5

Cl2O7

Which is the longest periodic table

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4

5

6

7

Typical transition element is

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Sc

CO

Ra

Y

Which alkyl halide does not form Grignard's reagent.

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CH3-Br

CH3-Cl

CH3- F

CH3-I

The normal amount of overhead ozone is.

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300 DU

350 DU

400 DU

450 DU

Nelson's cell is used to prepare

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NaOH

Na₂CO₃

Na metal

NaCl

Acetic acid form a dimer in liquid phase because.

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Low ionization constant of acid

High solubility in water

Hydrogen bonding

Greater polarity

Which one of the following gases is used welding purpose usualy.

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Methane

Ethane

Ethene

Acetylene

The residence time of NO is

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Few hours

1 day

3 days

4 days

Acid rain fist of all was observed by

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Augus Smith

Robert Hook

Mosley

Watson

Which elements are deposited at the cathode during the electrolysis of brine in diaphragm cell

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H₂

Ba

Ra

Rn

Chlorine heptoxide (CI₂O₇) reacts with water to form

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Ozone is mostly produced in

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Tropical region

North polar region

South polar region

Thermosphere zone of atmosphere

The percentage of clay and liem stone in cement is in the ratio of.

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1 : 1

1 :2

1:3

3:1

Which carbohydrate is called animal starch

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Glucose

Fructose

Glycogen

Starch

Hydrogen bond is the strongest between the molecules of.

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HF

HCl

HBr

HI

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