Question # 1

In Friedal-Craft's alkylation besides AICI3 the other reactants are

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C6H6 + NH3

C6H6 + CH4

C6H6 + CH3CI

C6H6 + CH3COCI

Which of the following is a molecular disease?

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Allergy

Cancer

German measles

Sickle cell anemia

Sea weeds are important source of

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Iron

Chlorine

Iodine

Bromine

The ratio of the ionization energy of H and Be³⁺ is

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1 : 1

1 : 3

1 : 9

1 : 16

The halide which is not hydrolysed is

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SiCI₄

SiF₄

CCI₄

PbCI₄

1-Chloropropane has two isomers It is an example of

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Chain isomerism

Position isomerism

Functional group isomerism

Metamerism

Ionic solids with defects contain

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Equal number of cation and anion vacancies

Interstitial anions and anion vacancies

Cation vacancies only

Cation vacancies and interstitial cations

Which is not a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

Evaporation of water is

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An exothermic change

An endothermic change

A process where no heat changes occur

A process accompanied by chemical

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

Reaction of acids with alcohols is also known as

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Esterification

Saponification

Alkalization

None

Wt. of 112 ml of oxygen at NTP on liquification would be

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0.32 g

0.64 g

0.16 g

0.96 g

Carbon atom holding halogen in aryl halides is

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sp²-hybridesed

sp³-hybridesed

sp-hybridesed

sp³d-hybridesed

Iron, once dipped in concentrated H₂SO₄, does not displace copper from copper sulphates solution, because

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It is less reactive than copper

A layer of sulphates is deposited on it

An inert layer of iron oxide is deposited on it.

All valence electrons of iron are consumed.

Minamata disease is due to pollution of

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Organic waste

Oil spill in water

Industrial waste containing mercury into fishing water

Arsenic into the atmosphere

Sulphure dioxide affects

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Cell wall

Plasmodesmata

All membrane systems

Nucleus

The maximum number of electrons in a subshell for whichι = 3 is

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14

10

8

4

Enzymes are

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Proteins

Minerals

Oils

Fatty acids

Variable valency is generally exhibited by

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Normal elements

Transition elements

Metallic elements

None of these.

How many moles of Helium gas occupy 22.4 L at 0°C at a atm. Pressure?

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0.11

0.90

1.0

1.11

A cell constant is generally found by measuring the conductivity of aqueous solution of

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BaCl₂

KCl

NaCl

MgCl₂

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