Question # 1

Which of the following precautions in necessary for smooth filtration

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The filter paper should be of big size

The tip of funnel should not touch the side of the beaker

The stem of the funnel should be very small

The stem of he funnel should remain continuously full of liquid

Which one of the following substances is not sublime material.

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Iodine

Benzoic acid

Ammonium chloride

Potash alum

Oxidation number of carbon in NaHCO₃

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+4

-6

+6

+2

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

Oxidation number of phosphorus in the compound is.

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+3

+4

+5

+6

Which of the following solutions will have the highest boiling point

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0.1 M NaCI

0.1 M CaCI₂

0.1 M FeCI₃

0.1 M glucose

Colligative properites are the properties of

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Dilute solutions which behave as nearly ideal solution

Concentrated solution which behave as nearly non-ideal solution

Both a and b

Neither a nor b

NH3 shows a maximum boiling point among the hydrides of the group V elements due to.

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Very small size of nitrogen

Long pair of electrons present on nitrogen

Enhanced electronegative character of nitrogen

Pyramidal structure of NH3

Orbitals having same energy are called.

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Hybrid orbitals

Valance orbitals

Degenerate orbitals

d- orbitals

Which of the following molecules has a co-ordinate covalent bond

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NH₄CI

NaCI

HCI

AICI₃

The distillation of a solution under reduced pressure is called

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Fractional distillation

Destructive distillation

Distillation

Vacuum distillation

18 g of glucose is dissolved in 90 g of water. The relative lowering of vapour pressure is equal to

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1/5

5.1

1/51

6

The unit of rate constant depends upon

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Number of reactants

Concentration terms

Order of reaction

Molecularity of reaction

The power of which the concentration of a substance appears in the rate expression is known as

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order of reaction with respect to that substance

Rate of reaction

Order of reaction

Molecularity of reaction

In given equation underlined element is. P+HNO3------------- H2PO4+NO+H2O

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Oxidized

Reduced

Neither oxidized nor reduced

Botha a and b

According to MOT, which molecular orbital has highest energy.

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sigma 1s

pi+ 2S

pi 2py

Pi+ 2px

Which one of the following aqueous solutions has the highest pH

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0.1 M NaOH

0.1 M HCl

0.2 M H2SO4

0.1 M HNO3

One of the following substances is not used as a drying reagent in a desiccator

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Cons. H₂SO₄

P₂O₅

Silica gel

50% KOH

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