Question # 1

Dissolved impurities of potable water can be separated by the process of

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reduction

Aeration

Electrolysis

Co-angulation

Which of the following are not known to form compounds in more than one oxidation state?

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Transition metals

Halogens

Alkali metals

Noble gases

Which of the following shows group IIIB

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Zn, Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

Name the compound, which shows geometric isomerism

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I-bromo-2-chloropropene

2.3-dimethy lpropene

2-pentene

Both A & B

Ozone is an allotropic form of:

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Carbon

Phosphorus

Oxygen

Sulfur

The substances added in paints for improving the mechanical properties is called:

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pigmein

filter

stabilizer

binder

The exothermic process is

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Evaporation

Sublimation

Respiration

Boiling

Daily protein intake for normal adults should be

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0.2 g/kg

0.5 g/kg

0.8 g/kg

1.1 g/kg

Which one of the following molecules show maximum hydrogen bonding?

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H₂O

H₂Se

H₂S

HF

Enzymes are

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simple proteins

derived proteins

compound proteins

conjugated proteins

Vapour pressure of a liquid is more if

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the intermolecular forces between the molecules of the liquid are strong

the intermolecular forces between the molecules of the liquid are weak

more liquid is present in a container

liquid has more surface area to evaporate

Which gasoline is better?

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Of low boiling point

Of low molecular mass

Of high octane

All of these

When electrically is passed through molten Al₂O₃+ Na₃AlF₆and 13.5 gms of Al are deposited, the number of farady must be

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0.5

1.0

1.5

2.0

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-110.7 KJ/mole

+110.7 KH mole^-1

676.7 KJ mole^-1

+393.7 KH mole^-1

A compound X has all of the following properties: It is a liquid at room temperature and atmospheric pressure; It does not mix completely with water; It does not decolorise acidified potassium manganate

What could X be

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Ethane

Ethanoic acid

Ethanol

Ethyl ethanoate

Which is not nitrogeneous fertilizers?

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(NH₄)₂HPO₄

NH₄NO₃

Urea

Calcium phosphate

Which of the following metal exhibits more than one oxidation?

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Na

Mg

Fe

Al

The solutions of NaCl and KCl are prepared separately by dissolving same amount of solute in water, which of the following statements is true fro these solutions ?

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KCl solution will have higher boiling point than NaCl solution.

Both the solutions have same boiling points.

KCl and NaCl solutions possess same vapour pressure.

KCl solution possesses lower freezing point than NaCl solution.

2.5 faradays of electricity is passed through solution of CuSO_{4. The number of gram equivalents of copper deposited on the cathode would be}

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1

2

2.5

1.25

Group VI-B of transition elements contains:

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Zn, Cd, Hg

Fe ,Ru ,Os

Cr, Mo ,W

Mn, Te, Re

The percentage of which element in the organic compound is determined by the difference method

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Carbon

Hydrogen

Nitrogen

Oxygen

The active part in a molecule is called

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Hetroatom

Functional group

Chemical bond

Ion

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