Question # 1

When formaldehyde is added to Grignard reagent we get

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Aldehyde

Acetone

Primary alcohol

Secondary alcohol

In lead accumulator the electrolyte is H₂SO₄solution is

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30% H₂SO₄

60% H₂SO₄

80% H₂SO₄

90% H₂SO₄

Rusting of iron is catalysed by

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Fe

O₂

Zn

H⁺

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Acidified AgNO_3(aq)

Fehling's solution

Na

Na₂XO_3(aq)

In the extraction of iron, slag is produced which is

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CO

FeSiO₃

MgSiO₃

CaSiO₃

In formadaldehyde and KOH are heated then we get

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Acetylene

Methane

Methyl alcohol

Ethyl formate

Heaviest particle is

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Meson

Neutron

Proton

Electron

The period table contains elements in vertical column. these vertical column are called

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Groups

Periods

Blocks

Sub group

Common names of carboxylic acids are given by then:

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Source

Person discovered

place

habit

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2, 2, 4-trimethylpentane

2, 4, 4-trimethylpentane

2, 4, 4-methyepentane

2, 2, 4-methylpentane

The number of electron that are paired in oxygen molecule are

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16

12

14

7

[Ti(H₂O)₆]⁺³ion absorbs colour:

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Blue

Yellow

Green

Red

Glucose in the presence of zymase is converted into

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Alcohol

Acid

Ethyl alcohol

Ketone

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Which of the followings is not a nulceophile

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OH^-

NH₃

C₂H₅O^-

Br₂

Kolb's method is not useful for the production of

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Methane

Ethane

Propane

Butane

General formula of alkyl halide is:

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R----X

R----OH

R------COH

R------COOH

Mg becomes isoelectronic with neon when it

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Loses two electrons

Gains two electrons

Loses 1 electron

Gains 1 electron

ΔH for an endothermic reaction carries

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Positive sign

Negative sign

Both sign

None of these

Number of neutrons in heavy hydrogen atom is

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0

1

2

3

Vinegar made form cane sugar, now a days synthetically contains

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Citric acid

Lactic acid

Acetic acid

Palmitic acid

Metals which are above SHE in electrochemical series

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Can liberate H₂from acid

Cannot liberate H₂from acid

Cannot always liberate H₂from acid

None of these

The most distinctive character among the elements is their division into

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Metals and non-metals

Solids, liquids and gases

Atoms and molecules

Active and inactive elements

When a carboxylic acid reacts with a metal ______ gas is evolved

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H₂

CO₂

CI₂

None of these

The increase in size of the anion is due to:

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Increase in electron-electron repulsion

Increase in valence shell electrons.

Decrease in valence shell electrons.

Both (a) and (b).

Which of the following is the strongest acid?

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CF₃COOH

CBr₃COOH

CH₃COOH

CCl₃COOH

A limiting reactant is one which according to the stoichiometric equation

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Has excess mass

Has least mass

Has excess number of moles

Has least number of moles

Density of aluminium is (g cm^-3):

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B

Al

Si

Ge

Types of cracking are:

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Thermal

Catalytic

Steam

All a, b ,c

Vitamin A is present in

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Liver

Milk

Green vegetables

All

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