Question # 1

You are styding the rate of hydrolysis of organic compund staarch under different conditonns of temperature. In which branch of chemistry this topic will fall

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Organic Chemistry

analytical chemistry

Biochemistry

Physical Chemistry

Which branch of chemistry is athe study elements and their compounds except for organic compounds?

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Physical Chemistry

Geochemisty

Organic chemistry

Inorganic chemistry

A complete reaction is in which

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Only 10% reactants covert into products

All the reactants covrt into products

All the reactants do no covrt into products

Half reactants covert into produts

Building block of all matter is.

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element

Compound

Mixture

Atom

How many valance shell electrons are there in Na+ ion.

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8

9

1

10

When we mvoe top to bottom in group, ionization energy.

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Increases

No effet

Decreases

None of these

Which is released in anacrobic respiration.

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Stearic acid

Citric acid

Lactic acid

Amino Acid

Ionic compund are good conductors electricity in

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Solution

Molten state

Solid state

both a and b

Empirical formula of acetic acid (CH3COOH) is

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CHO

CH

CH2O

None of these

When new bonds ae formed, the energy is

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Consume

Remain same

Release

None of these

Which is used to manufacture soap?

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NH4OH

Ca(OH)2

NaOH

Mg(OH)2

Chemical formula of amino group is

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NH₃

NH₂

NH₄

COOH

Acid reacting with metal sulphides, liberate gas.

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Oxygen

Hydrogen

Hydrogen Sulphide

Hydrogen Oxide

What is pOH of 0.01 M solution of KOH?

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3

11

2

4

Which pollutant is responsible for changing weather?

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Air pollutant

Water pollutant

Soil pollutant

All of them

When the magnitude of Kc is very large in indicates.

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Reaction never go to completion

Reaction is in equilibrium state

Reaction will complete after some time

Reaction has almost to completion

the removal of which ion causes water softening.

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Na⁺

Mg²

Li⁺

K⁺

If Qc < Kc the reaction goes in:

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Forward

Reverse

At equilibrium state

None

Oxidation of alkenes produce.

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Glyoxal

Glycol

Oxalic acid

Formic acid

The reactions in which products can recombine to form reactants is called.

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Irreversible reactions

Reversible reactions

Direct reactions

Indirect reactions

_________ acid is used in lead storage batteries as electrolyte.

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CH₃COOH

HCl

HNO₃

H₂SO₄

Which one of the following ion does not cause hardness in water?

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Ca⁺²

Mg^-2

SO^-2

Na⁺

Which of the following contains the same number of molecules as 9 g of water.

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2 g of hydrogen gas

14 g of nitrogen gas

32 g of oxygen gas

44 g of carbon dioxide gas

Almost forward reaction is complete when value of Kc is

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very high

Very small

Neither large nor very small

No correlation

According to classical concept, oxidation involves

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Addition of oxygen

Addition of electron

Removal of hydrogen

All are correct

One of the following substances does not undergo sublimation

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KMnO₄

Naphthalene

NH₄CI

Iodine

The temperature of natural plasma is about.

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200000 ^oC

10000^oC

5000^oC

1000^oC

Weak intermolecular forces are present in.

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Only gases

Only liquid

Only solids

gases, liquids and solids

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will

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Remain unchanged

Increase four times

Reduce to 1/4

Be doubled

Which molecule has sG2 hybridization.

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CH4

C2H4

C2H2

C2H5

The net heat change in a chemical reaction is same whether it is brought about in two or more different ways in one or several steps. It is known as

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Henry's law

Hess's law

Joule's principle

Law of conservation of energy

The carbon atom is C2H4 is.

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sp3 hybridized

sG2 hybridized

Sp hybridized

dsG2 bybridized

Which one of the following process is endothermic

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condensation of steam

Freezing of water

electrolysis of water

None of these

The transition elements which are present in 4th period of periodic table have atomic number.

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22 to 30

21 to 30

21 to 29

21 to 31

An aldehyde compound can be reduced to alkane by

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Wurtz reaction

Grignard reaction

Wolf Kishner reaction

Kolbe's reaction

SN₂reactions can be best carried out with

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primary alkyl halides

secondary alkyl halides

tertiary alkyl halides

All the three

Acetic acid is manufactured by.

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Distillation

Fermentation

Ozonolysis

Esterification

The benzene molecule contains.

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Three double bonds

Two double bonds

One double bonds

Delocalized sigma electron charge

Mono saccharides contain carbon atoms.

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3 to 6

3 to 7

3 to 9

only six

Absolute alcohol can be obtained from rectified spirit by

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By adding sodium metal

By extraction

By predistillation in the presence of CaO

Not possible because of azeotropic mixture

Galvanized iron is protected by a thin layer of

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Cr

Zn

Sn

Pb

Which of the following gas will turn lime water milky

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Cl₂

NO₂

CO

CO₂

Which one of the following is formed when ethyne is heated in copper tube at 300 ^oC

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Ethene

Ethane

Benzene

Cyclohexane

The resonating contributing structures of Benzene are

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2

3

5

7