Question # 1

A solution of glucose is 10% to volume in which 1 g mole of it is dissolved will be

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1 dm³

1.8 dm³

200 cm³

900 cm³

Which process is endothermic and spontaneous

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Neutralization of NaOH with HCl

Formation of NH3 from H2 and N2

Formation of H2O from H2 and O2

Evaporation of sea water

The voltage Nickel Cadmium cell is

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1 V

1.2 V

1.4 V

1.6 V

Which of the following species has unpaired electrons in anti-bonding molecular orbitals

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O₂⁺²

N₂^-2

B₂

F₂

The H - H Bond energy in KJ mole -1 is.

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346

436

463

336

The comparative rates at which the solutes move in paper chromatography depend on.

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The size of paper used

Rf values of solutes

Temperature of the experiment

Size of the chromatographic tank used

The number of bonds in nitrogen molecule is

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One o and oneπ

One o and twoπ

Three sigma only

Two o and twoπ

The smallest collection of ions in an ionic compound is called.

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Formula unit

Chemical formula

Formula mass

Molecular formula

How many balloon of 0.25 dm3 capacity at 1 atmospheric pressure can be filled from a hydrogen gas cylinder of 5 dm3 capacity at 10 atmospheric pressure.

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50

90

180

200

The paramagnetic behaviour of oxygen is well explaned on the basis of.

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M.O Theory

N.B Theory

VSEPR Theory

CF theory

The relative lowering of vapour pressure is equal to the mole fraction of the solute. This law is known as

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Ostwald dilution law

Raoult's law

Vant hoff's law

Henry's law

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

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2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

Molal boiling point elevation depends upon

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Nature of solvent

Natrue of solute

Vapour pressure of solution

None of these

Which of the following has linear structure.

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CO2

NH3

CH4

H2O

Fuel cells are the means by which chemical energy may be converted into

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Heat energy

Magnetic energy

Sound energy

Electric energy

Which one of the following methods will be used to separate the mixture of NaCl and sand.

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Chromatography

Solvent extraction

Sublimation

Filtration

When liquid water changes to ice its volume expands. The expansion in volume is.

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5%

9%

10%

18%

The number of moles of acid or base required by one dm³of buffer to alter its pH by one unit is called

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Buffer efficiency

Buffer capacity

Buffer action

None

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