Question # 1

The unit of the rate constant is the same as that of the rate of reaction in

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First order reaction

Second order reaction

Zero order reaction

Third order reaction

The molarity of 2% w/v NaOH solution is

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2

0.25

0.05

0.5

In Al2O3, the ratio between the ions is

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1 :2

2:1

2:3

3:2

The electron in a subshell is filled according to formula.

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2n²

2(2l+1)

(2l+1)

None of these

Chromatography in which the stationary phase is a solid is classified as.

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Partition chromatography

Gas chromatography

Adsorption Chromatography

Thin layer chromatography

With increase in 10°C temperature, the rate of reaction double. This increase in rate of reaction is due to

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Decrease in activation energy of reaction

Decrease in the number of collisions between reactant molecules

Increases in activation energy of reactants

Increase in number of effect collisions

When one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide.

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Diamond

C2H6

Methane

CO2

The molecule having zero dipole moment is.

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NH3

CHCl3

H2O

BF3

Diamond is a bad conductor because.

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It has tight structure.

It has a high density

There is no free electron present in the crystal of diamond to conduct electricity

None of the above

The shape of H₃O is

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Tetrahedral

Angular

Trigonal planer

Pyramidaj

An ionic compound A⁺B^-is most likely to be formed when

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The ionization energy of A is high and electron affinity of B is low

The ionization energy of A is low and electron affinity of B is high

Both the ionization energy of A and electron affinity of B are high

Both the ionization energy of A and electron affinity of B are low

Molal boiling constant for water is 0.52 ^oC. If 6 g of urea is dissolved in 100 g of water, what will be its boiling point.

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100.52 ^oC

-100.52^oC

100^oC

99^oC

A chemical change always involve

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Absorption of heat

Evolution of heat

Either absorption or evolution of heat

The liberation of heat and light energy

In which compound oxidation state of chlorine is +5

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NaCl

HOCl

NaClO3

NaClO2

BF3 has zero while NH3 has 1.49 D dipole moment because.

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B is less electronegative than N

F is more electronegative than N

BF3 is pyramidal while NH3 is planar

NH3 is pyramidal while BF3 is trigonal planar

How many electrons can be accommodated in sub shell for which n = 3, l = 1

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6

8

18

32

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

The cathodic reaction in the electrolysis of dill. H₂SO₄with Pt electrodes is

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Reduction

Oxidation

Both oxidation and reduction

Neither oxidation nor reduction

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