Question # 1

Pressure of 1Nm^-2 is equal to

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One bar

1 psi

One pascal

One atmosphere

In an electrochemical series, elements are arranged on the basis of

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pH scale

pKa scale

pOH scale

Hydrogen scale

Which class of compound cannot show positional isomerism?

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Alkanes

Alkene

Alkynes

Alcohol

Which one of the following substances is a synthetic polyester?

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cotton

nylon

rayon

terylene

Which of the following is the unit for pressure of a gas in system international

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Nm^-2

mm of Hg

atmosphere

torrr

Men residence time of methane in atmosphere in years is:

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1-7

2-7

3-7

4-7

Photo chemical smog contains ______ as main reactants

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Nitrons oxide and unburnt hydrocarbons

Nilric oxide and unburnt hydrocarbons

No and burnt hydrocarbons

N₂O and burnt hydrocarbons

An example of regulatory protein is

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nucleoprotein

hemoglobin

lactoglobulin

thyroxine

Molar mass of formic acid in benzene comes out to be

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64

46

32

92

Which of the following least resemble an ideal gas?

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ammonia

helium

hydrogen

trichloromethane

The most complex strueture a single polypetide can assume is

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1° structure

2°structure

3° structure

4° structure

When during electrolysis of a solution of AgNO₃, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cathode will be

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1.08 g

10.8 g

21.6 g

108 g

Glyptal polymer is obtained from glycerol on reacting with

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Malonic acid

Phthalic acid

Maleic acid

Acetic acid

Coupling of Pb with its Pb⁺⁺/Pb = -0.13 V and Ag with Ag⁺/ Ag = +0.80 V, the cell reaction

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In which of these processes are smell organic molecules made into macromolecules?

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The cracking of petroleum fractions

The fractional distillation of crude oil

The polymerization of ethane

The hydrolysis of proteins

Preparation of vegetable ghee involves

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Halogenations

Hydrogenation

Hydroxylation

Dehydrogenation

Thre rate of S_N2 reaction depends upon the

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Concentration of alkyl halides

Concentration of nucleophile

Concentration of alkyl halides and nucleophile

None of the above

Which of the following ion has the highest value of ionic radius?

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Li⁺

F^-

O^2-

B³⁺

Shielding effect intervening electrons causes

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Decreases in atomic radii in a period from right to left

Increase in atomic radii in a period from left to righ t

Decrease in atomic radii down the group

Increase in atomic radii down the group

Which one of the following gases is used for artificial ripening of fruits

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Ethene

Ethane

Methane

Propane

The force which holds the atoms together to form a compound is called

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A chemical bond

Van der waal's force

Dispersion force

London force

Which of the following d-block elements can show the highest oxidation number in its compounds

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Chromium

Copper

Nickel

Manganese

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