Question # 1

In endothermic reactions, the heat content of the

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Products is more then that of reactants

Reactants is more than that of products

Both a and b

Reactant and products is equal

When 6d orbital is complete, the entering electron goes into.

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7f

7s

7p

7d

The molecules of a gas show more deviation from ideal behaviour at low temperature, because

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Attractive force dominate at low temperature

Kinetic energies are increased

Collisions become less frequent

Densities of the gases increase

Equal masses of methane and oxygen are mixed in an empty container at 25°C, the fraction of total pressure exerted by oxygen is

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1/3

8/9

1/9

16/17

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

If we plot a graph between I/V at x-axis and pressure at Y -axis

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a parabolic graph is obtained

By increasing temperature straight line move toward x axis

By increases temperature straight line move toward y axis.

No. change in line by increasing temperature.

According to classical concept, oxidation involves

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Addition of oxygen

Addition of electron

Removal of hydrogen

All are correct

Which one of the following substances is used as water absorber in combustion analysis.

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Mg(CIO4)2

50% KOH

Lime water

Dilute solution of NaOH

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

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1/5

5.1

1/51

6

Which properties of liquid is measured by polarimeter

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Conductance

Refractive index

Optical activity

Change in volume

A filtration process could by very time consuming if it were into aided by a gentle suction which is developed.

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If the paper covers the funnel upto its circumference

If the paper has got small sized pores in it.

If the stem of the funnel is large so that it dips into the filtrate

If the paper fits tightly

Which of the following particles would on losing an electron has its outermost p-orbital as half filled

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Nitrogen atom

O⁺ion

P^-1ion

S⁺¹ion

The number of molecules in one dm³of water is close to

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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

In gas occupies a volume of 2 dm³at 27°C and I atm pressure. The expression for its volume at S.T.P. is

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For which system does the equilibrium constant K_chas units of (concentration)^-1

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Which one of the following salts do not hydrolyses

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CuSO4

Na2CO3

NaCl

AlCl3

The wave number of the light emitted by a certain source is 2 x 10⁶m. the wavelength of this light is

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500 nm

500 m

200 nm

5 x 10⁷m

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