Question # 1

If four moles of sulpur dioxide are oxidised to sulphur trioxide, how many moles of oxygen molecules are required

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0.5

1.0

1.5

2.0

Between CH₃COOH and HCOOH, HCOOH will be

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Less acidic

Equally acidic

More acidic

None

The protein which only yield amino acids and their derivatives

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Simple proteins

Complex proteins

Derived protein

All of these

The rotation of two carbon atoms joined by double bond would happened only if

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Pi bond is broken

Sigma bond is broken

Both bonds are broken

None of above

Williamson's synthesis is used to prepare

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Diethylether

Phenolphthalein

Hydrogenation

Bakelite

Which acid is used in the manufacture of synthetic fibre?

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Formic acid

Oxalic acid

Carbonic acid

Acetic acid

Phosphorus pentoxide finds use as

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An oxidizing agent

A reducing agent

A bleaching agent

A dehydrating agent

The value of R(General Gas Constant) is

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8.3134 JK^-1mole^-1

1.987 Cal K^-1Mole^-1

Both a and b

1.987 JK^-1mole^-1

Nitrogen in NH₃is sp³hybridized but the bond angle in NH₃is 107° and not 109.5° due to

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sp³orbital planar

sp³orbital trigonal

Repulsion between lone pair and bonded pairs

None of them

Plastics are pollution problem because many plastics:

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Are made from petroleleum

Are very inflammable

Burn to produce toxic funes

Decompose to produce toxic products

Compared to a 1.0M aqueous solution of calcium chloride will have

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The same freezing and boiling point

A lower freezing point and lower boiling point

A lower freezing point and higher boiling point

A higher freezing point and higher boiling point

Which statement is incorrect for NICAD battery

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The electrolyte is alkali

Cd acts as anode

MnO₂acts as electrolyte

NiO₂acts as cathode

In alkynes the bonds between carbon atoms are

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All sigma bonds

All pi(π) bonds

One is sigma and two areπ(pi) bonds

One isπ(pi) and two are sigma bonds

Formula of chloroform is:

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CH₃Cl

CCl₄

CH₂Cl₂

CHCl₃

A ring contains 3 gram diamond. The number of C-atoms which a ring contains is

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3.01 x 10²³

1.5 x 10²³

6.02 x 10²⁴

3.01 x 10²⁴

The tip of funnel should be 1 or 2cm larger than the circle of the

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Beaker

Solid

Filter paper

Liquid

Which one is not a pollutant normally?

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Hydrocarbons

Carbon dioxide

Carbon monoxide

Sulphur dioxide

The avtive mass of 64 g of HI in a two litre flask would be

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2

1

5

0.25

The wave number of the line emitted is 109.678 x 10⁵m^-1in the Lyman series when electron transition occurs

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A colourless liquid, at room temperature reacts with soda lime to form sodium salt of carboxylic acid and ammonia gas. The liquids is

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Propanamide

Propanoic acid

Formamide

Methyl Ethanoate

Potassium chromate has formula

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KClO₃

K₂CO₃

K₂CrO₄

K₂Cr₂O₇

Benzene is prepared from n-hexane in the presence of catalyst

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Cr₂O₃

Al₂O₃

SiO₂

All above

Anode is the surface on which probability of finding electron is:

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50%

Less than 10%.

More than 95%.

Zero.

A limiting reactant is the one which

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Is taken in lesser quantity in grams as compared to other reactants

Is taken in lesser quantity in volume as compared to other reactants

Gives the maximum amount of the product which is required

Gives the minimum amount of the product under consideration

The characteristic reactions of alkanes are

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Addition reactions

Substitution reactions

Condensation reactions

Polymerization reactions

Electronic configuration of Cu⁺²is

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4S², 3d⁹

4s^-1, 3d¹⁰

4S⁰, 3d⁹

None of these

Which electronic configuration corresponds to an element of Group ||Z-A of the periodic table?

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1s, 2s², 2p⁶, 3s², 3p⁶, 4s²

1s², 2s², 2p⁶

1s², 2s², 2p⁶, 3s², 3p³

1s², 2s² , 2p⁶, 3s², 3p¹

0.1 MHCI has pH = 1.0, it is about 100 times stronger than acetic acid. Then pH of acetic acid will be

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0.1

2.0

1.3

3.0

The malt-sugar in the presence of yeast or invertase gives

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Fructose

Glucose

Lignin

Alcohol

Glucose in the presence of zymase is converted into

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Alcohol

Acid

Ethyl alcohol

Ketone

Which can be used for dehydration of alcohol

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P₄O₁₀

H₂SO₄

H₃PO₄

All of them

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