Question # 1

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

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NO₂

SO₂

Hg

Pb

Butane has isomeric forms

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3

4

2

1

The bonding occurs among polar covalent molecules containing H and one of the small electronegative element such as O,F or N is called:

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Ionic bonding

Metallic bonding

Bridge bonding

H-bonding

Coal contains percentage of sulphur:

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1-9%

5-9%

6-9%

7-9%

Which of the following species is used to formation of glycerol fatty acid from triglyceride

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NaOH

Ni

Lipase

All

Which of the following does not contribute towards the formation of photochemical smog?

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NO

SO₂

O₃

Hydrocarbons

Empirical formula of monosaccharide is

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(CHO)_n

CH_nO_n+1

C_nH₂O

(CH₂O)_n

If temperature is 73K and volume is 146 cm3 then calculate the value of K=V/T

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5

4

3

2

Buffer action can be explained by except

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Common ion effect

Le-Chatelier's principle

Law of mass action

Solubility product

The maximum oxidation state of Mn is

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+6

+7

+5

+4

In aldehydes and ketones carbon of carbonyl group is;

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sp³ hyhridized

sp² hybridized

sp hybridized

un hybridized

The cell which generates electricity as a result of spontaneous oxidation-reduction reaction is called

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Electrolytic cell

Nelson's cell

Galvanic cell

Down's cell

10g Of NaOH Has Been Dissolved Perdm³of solution. The morality of solution is :

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0.025 M

1.5 M

0.1 M

.25 M

Bond angle is minimum for

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H₂O

H₂S

H₂Se

H₂Te

The diameter of atoms is of the order:

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2* 10^-5m

2* 10^-10m

2* 10^-2m

2* 10^-3m

The acid showing salt like character in aqueous solution is

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Acetic acid

Benzoic acid

Formic acid

α - Aminoacetic acid

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

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Pb

Cr

Hg

All of these

If a large number of amino acids (hundreds to thousands) are joined by peptide bonds, the resulting product is called

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Dipeptide

Tripeptide

Polypeptide

None of these

Carboxylic acids generally exists in cyclic

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Monomers

Dimers

Trimers

Tetrameter

Fossil fuels consist of :

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Coal

Natural gas

Petroleum

All of these

Two moles of HI was heated in a sealed tube at 440°C till the equilibrium was reached. HI was found to be 22% decomposed. The equilibrium constant for dissociation is

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0.282

0.0796

0.0199

1.99

Terylene is madeby polymerization of terephthalic acid with

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Ethylene glycol

Phenol

Ethanol

Catechol

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