Question # 1

Outer shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be

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XY

X₂Y

X₂Y₃

XY₂

A fibre which is made from acrylonitrile as monomer

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PVC

Rayon fibre

Acrylic fibre

Polyester fibre

The tendency of an atom to attract shared electron pair towards itself is called

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Covelent bond

Electronegativity

Ionization potential

Electronic affinity

Effective magnetic moment of Sc³⁺ion is

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1.73

0

5.92

2.83

Ammonia like water also reacts with Grignard's reagent to give

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Alkane

Alkene

Alkyne

Amide

Alcohols are named by replacing 'e' of alkane with:

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al

ene

ol

one

Which one of the following reaction rate is effected by the light

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If 5.85 of NaCI are dissolved in 90g of water the mole fraction of NaCI is

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0.1

0.01

0.2

0.0196

N₂ + 3H₂ ⇌2NH₃

The unit of K_c for tis reaction will be:

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mol² dm^-6

mol^-2 dm⁺⁶

mol dm^-3

mol^-1 dm⁺³

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

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H₂SO₄

Ni

Fe₂O₃

Al₂O₃

A chemical inert and heat resistant plastic, that is made form tetrafluoroethlene, is called

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Teflon

PVC

Bakelite

Polyamide

Enzymes are chemically

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Carbohydrates

Proteins

Fatty acids

Phospholipids

The unit of rate constant K ismole^-1 dm³for a chemical reaction, the order of reaction is :

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Order of reaction can determined by an experiment

Order of reaction can determined from a balance equation only.

Order of reaction can determined increases by increasing temperate.

Order of reaction must be in whole number and not in fraction.

In its reaction with Na, 1 mol of X gives 1 mol of H_2(g). What is X

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CH₃CH₂CH₂CH₂OH

(CH₃)₃COH

CH₃CH₂CH₂CO₂H

CH₃CH(OH)CO₂H

Coordination sphere may be:

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Cationic

Anionic

Neutral

All above

pH of the human blood which is essentially maintained constant due to carbonates, biocarbonates, phosphates etc., is

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7.00

7.25

7.35

7.47

Hydrocarbons contain :

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Carbon only carbon

Hydrogen only

Carbon & hydrogen

Carbon , hydrogen & halogen

Tollen's reagent is

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Ammonical cuprous chloride

Ammonical cuprous oxide

Ammonical silver bromide

Ammonical silver nitrate

The fibre which contains polymers of vinylidine chloride as fibre forming substance is known as

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Saran fibre

Nylon

Polyester

Acetate fibre

The iron obtained from blast furnace is

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Pig iron

Wrought ion

Soft ion

Steel

Sulphuric acid reacts with PCl₅to give

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Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

Corrosion reaction are

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Spontaneous redox reaction

Non-spontaneous acid-base reactions

Spontaneous acid-base reactions

None of these

The oxidation number of each element of group l-A is

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0

+1

+2

-1

The rate of which the reaction proceeds is directly proportional to the product of the active masses of the reactants is according to

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Law of mass action

Le Chateliers principle

Equilibrium law

Law of constant proportion

If the rate of reaction is independent of the concentration of the reactant, the reaction is of

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Zero order

First order

Second order

Third order

Partial pressure of a solution component is directly proportional to its mole fraction. This statement is known as

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Henry's law

Raoult's law

Distribution law

Ostwald's dilution law

The gasoline having octane No. 100 has ______

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More knocking

Less knocking

No knocking

Only knocking

Which one of the following elements is not present in all proteins

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Carbon

Hydrogen

Nitrogen

Sulphur

Benzene was discovered by Michael Faraday's in

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1824

1825

1826

1827

Which carbohydrates is an essential constituent of plant cells?

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Starch

Cellulose

Sucrose

Vitamins

Selection of filter paper depends upon sizes of particles to be:

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Tested

^Filtered

Checked

All of above

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