Question # 1

What is clinker?

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Roasted calcareous material

Roasted calcareous & argelarious material

Roasted argillaceous material

Roasted gypsum

According to Avogadros law 1 mole of gas at S.T.P has a volume of

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22.4 dm³

24 dm³

24000 cm³

2m³

Nucleic acid contain elements like N,H,O,C and

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Ca

S

P

F

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

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10,000

20,000

100,000

50,000

Which of the following liquid has highest bolling point

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HCI

HBr

H2O

Br2

The elements of group I-A react violently with water and make the solution

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neutral

amphoteric

acidic

alkaline

Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water:

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Live stock wastes

Oil spilage

detergents

pesticides

For an ideal gas, number of mole in terms of its pressure P, temperature T and gas constant is

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PT/R

PRT

PV/RT

RT/P

The factor responsible for lower mercury level in a capillary tube is

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High density

Surface tension

Liquid state

Metallic Colour

Evaporation causes

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High temperature

High pressure

Cooling

Vapour

Ph of unpolluted rain water is

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07

Less than 6

5.6

Less than 5

Ethyl bromide is formed by the reaction of HBr with

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Ethane

Ethene

Ethyne

Propane

Which of the following does give violet colour with neutral ferric chloride?

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Acetic acid

Salicaylic acid

Formine acid

Benzoic acid

Which of the following element's outermost orbits last electron has magnetic quantum number m=0?

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Na

O

Cl

N

The unit of specific conductivity is

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Ohm cm^-1

Ohm cm^-2

Ohm^-1cm

Ohm^-1cm^-1

The tip of the funnel should touch the side of the beaker in order to avoid :

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Splashing.

Leakage.

Mixing.

Contamination.

Sodium can be obtained by :

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Electrolysis of acidified water.

By heating NaCl and water at 100°

Electrolysis of molten sodium chloride.

Electrolysis of aqueous sodium chloride.

Solution may have units

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Molarity

Molality

Mole fraction

All of them

In KO₂the oxidation state of oxygen is

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-2

-1

+1/2

-1/2

How many alcohol (including both structural isomers and stereoisomers) can have the molecular formula C₄H₁₀O

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3

4

5

6

Carbon atom holding halogen in aryl halides is

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sp²-hybridesed

sp³-hybridesed

sp-hybridesed

sp³d-hybridesed

The oxidation number of Mn is KMnO₄is

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+2

+4

+6

+7

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