Question # 1

Which is not the affect of polluted air on environment

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Acid rain

Smog

Ozone

Global warming

Which is the chain isomer of n-pentane

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Isopentane

Neopentene

N-pentene

Isopentene

Which is in differnet phase form other metals

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Ni

Hg

Cd

Na

Alcohol can be prepared from Grignard's reagent with an aldehyde: If we start with formaldehyde the product alcohol with be

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Primary

Secondary

Territory

Aromatic

The galvanic or voltaic cells which are rechargeable called as

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Primary cells

Secondary cells

Dry cells

Infinite cells

Which of the following molecules have multiple bonds

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CH₄

C₂H₄

C₂H₆

CCI₄

Alkyl halides ae considered to be very reactive compounds towards nucleophiles because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

What are alloys

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A homogenous mixture of two or more elements

A homohenous mixture of metal and a non-metal

A homogenous mixture of two or more metals

None of the above

Soil salinity can be measured by

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Calorimeter

Potometer

Porometer

Conducitvity meter

For which system does the equilibrium constant, KC has units of concentration

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Each molecule of haemoglobin is 68000 times heavier than one atom of

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C

H

N

O

Taste of lower alcohols is:

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Sweet

Bitter

Our

Salty

Which compound is both chiral and acidic

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Which of the following is a tetrabasic acid?

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ORthophosphoric acid

Hyposphosphorus acid

Metaphosphoric

Pyrophosphoric acid

Fatty acids are:

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Allphatic monocarboxylic acids

Dicaroxylic acids

Tricarboxylic acids

Tetracarboxylic acids

Poly carboxylic acids

Which salt is used for the treatment of hyperacidity in stomach

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NaCl

KCl

NaHCO₃

Na₂CO₃

Micro-nutrients are required in quantity ranging from

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4g-40g

6g-200g

6Kg-200Kg

4Kg-40Kg

Which of the following is not a fertilizer

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Nitrophos

Dolomite

Super phosphate of lime

Urea

How many moles of oxygen, O₂are needed for the complete combustion of two moles of butane C₄H₁₀?

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2

8

10

13

Which of the following solution have zero pH

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1 M HCI

MH₂SO₄

0.1 M HNO₃

1 M CH₃COOH

In a lime kiln, to get higher yield of CO₂, the measure that can be taken is

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To main high temperature

To pump out CO₂

To remove Cao

To add more CaCO₃

Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to

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The formation of less stable carbonium ion

Resonance stabilization

Larger carbon-halogen bond

The inductive effect

At room temperature, the mole fraction of a solution in 0.25 and the vapour pressure of the solvent is 0.80 atm. Then the lowering of vapour pressure is

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0.75

0.512

0.80

0.0512

By applying Hess's law, we can calculate

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ΔH

ΔS

ΔF

K

B-atom in BF₃has

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sp³hybridization

sp²hybridization

sp hybridization

no hybridization

Ethylene can be prepared in the laboratory by heating together ethyl alcohol and

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HCI

Phenol

HF

H₂SO₄

Lead accumulator contains

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30% NaCI solution as electrolyte

30% HCI solution as electrolyte

30% H₂SO₄solution as electrolyte

30% NaOH solution as electrolyte

A carboxylic acid contains:

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A hydroxyl group

A carboxyl group

A hydroxyle & carboxyl group

A carboxyl &aldehyde group

The reaction of alcohol with SOCI₂in the presence of pyridine as catalyst gives

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Acids

Acid chloride

Alkyl halide

Benzene

Hydrocarbons contain :

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Carbon only carbon

Hydrogen only

Carbon & hydrogen

Carbon , hydrogen & halogen

The formula of lime stone is

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CaCl₂

MgCO₃

Na₂CO₃

CaCO₃

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