Question # 1

Van der Waal's forces exist in

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Polar compounds

Non-polar

Covalent

All types of atoms and molecules

When calcium formate and calcium acetate are dry heated they form

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НCOOH

C2H5OH

CH3CHO

HCHO

A term to express the partial pressure of water vapours in a gas is known as

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vapour pressure

aqueous tension

partial pressure

moisture

The number of unpaired electrons present in Fe ions is

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1

2

5

0

Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases

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NO₂

SO₂

Hg

Pb

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

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HF

CO₂

CH₄

N₂

London forces are more affective at

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low temperature

high temperature

low pressure

low temperature and high pressure

The density of ice is 1.00gcm^-3.

What the volume of steam produced when 1.00-3 of ice is heated to 323^{∘C (596K) at a pressure of one atmosphere (101kPa)?}

[1 mol a gas occupies 24.0dm³ at 25a^∘C(295K)and one atmosphere.]

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0.267 dm³

1.33 dm³

2.67 dm³

48.0 dm³

Which of the following metal cannot evolve hydrogen from the acetic acid

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Sodium

Potassium

Magnesium

Copper

Amount of cellulose produced by plants every year is _____ approximately

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100 billion tons

90billion tons

80 billion tons

70 billion tons

Vapour pressure of a liquid

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increasing with increase of temperature

increases with decrease of temperature

increases with size of container

increases with volume of liquid

The oxidation number of chromium in K₂Cr₂O₇is

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14

12

6

None of these

Lysine is ______ amino acid

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Acidic

Basic

Natural

None of these

Industrial alcohol may be denaturated by the addition of

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Methyl alcohol

Acetone

Pyridine

Any of the above reagent

During reaction of O₂and alkenes, a product:

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Glycol

Epxide

Halohydrin

Ethylene glycol

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

Solubility cure of Na₂SO₄10H₂shows

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Constant increase of solubility

Constant decreases of solubility

Discontinuously solubility wit temperature

None of above

Sulphonation of benzoic acid produces mainly

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o-Sulphobenzoic acid

m-sulohobenzoic acid

p-Sulphobenzoic acid

o-and p-Sulphobenzoic acid

Formula of acetone is:

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HCHO

CH₃CHO

CH₃OCH₃

CH₃OC₂H₅

Which of the following does not give iodoform test?

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Ethanol

Ethanal

Acetophenone

Bezophenone

Which is not the condition for the formation of smog

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There must be sufficient NO gas

There must be sunlight to help photo chemical reaction to take place

Air must be blowing swiftly

There must be SO₂in the air

A carboxylic acid containing Ar group in it is called:

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Aromatic carboxylic acid

Allphatic carboxylic acid

Dicarboxylic acid

Carboxylic acid

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