Question # 1

How many CI^- ions are there around Na+ ion in NaCI crystal?

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3

4

6

8

When enzyme fumarase is exposed to UV light, then

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Its activity is enhanced

It converts into Glucokinase

It is inactivated

None

Oceans cove ____________ percent of the surface of the earth

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60

70

80

97

Denaturation of protein means the structure of protein is disrupted indicate which factor does not denature protein

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Oxidizing agent

Heat protein

Keeping pH 7.35

pH changes

A single chloride free radical of CFCs can destroy upto ozone molecules:

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10

100

1000

100000

Surface tension is measured by

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viscometer

barometer

stalagmometer

manometer

Monosaccharides belong to the group

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lipids

fats

proteins

carbohydrates

The total number of 3d-series transition elements is

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10

40

14

58

Surface and ground water sources are contaminated by various human activities. Which of the following is not human activity that causes contamination in fresh water

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Live stock waste

Oil leaks and spills

Desposal of industrial effluents

Rain

Bonding in MgO is an example of

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lonic bond

Polar bond

Covalent bond

Coordination covalent bond

Always carboxylic acid produced will have number of carbon atoms from carbon atom in alkyl nitriles:

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One more

Two more

Equal & same

One less

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

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Which compound is more soluble in water?

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C₂H₅OH

C₅H₅OH

CH₃OCH₃

n-Hexanol

The volume occupied by 1.4 g of N₂at S.T.P is

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2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

Hydrocarbans, SO₂, CO, NH₃, nitrogen oxides and compounds of fluorine are called

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Primary pollutant

Secondary pollutant

Tertiary pollutant

None of these

Salol is prepared from

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Salicylic acid and phenol

Salicylic acid and methyl alcohol

Both

None

Charge of an electron is:

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1.6 x 10^-19 C

9.1 x 10^-34 C

1.7588 x 10¹¹ C

6.62 x 10^-34 C

Under what condition of temperature and pressure the formation of atomic hydrogen from molecular hydrogen will be favourd

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High temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

:Low temperature and high pressure

Cu²⁺with d⁹electronic configuration appears

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Yellow

Pink

Blue

Green

Mark the correct statement

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Na⁺is smaller than Na atom

Na⁺is larger than Na atom

Cl^-is the smaller than Cl atom

Cl^-(ion) and Cl (atom) are equal in size

The branch of chemistry which deals with the study of compounds containing carbon as an essential elements is called

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Physical

Inorganic

Nuclear

Organic

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