Question # 1

Compound which undergo sublimation is

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KMnO4

CaCO3

NH4Cl

Na2CO3

The volume of a gas at 0 oC is 273 dm3, the pressure remaining constant. At which temperature its volume will be doubled.

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273 K

273 ^oC

546 ^oC

316 K

Which one of the following has the greater ionic characters in it.

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HF

HCl

H2O

H2

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

In H2SO4the oxidation number of 'S' is

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+2

+6

+8

+4

When solid KI dissolved in water, its heat of solution is positive. What would happen to dissolution when temperature is increased.

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Increases

Decreases

Remain same

Firs increases than decreases

An aqueous solution of ethanol is water has vaporu pressure.

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Equal to the of water

Equal to that of ethanol

More than that of H2O

Less than that of water

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

Large value of distribution coefficient K means.

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Component of solute dissolved large in mobile phase

Components of solute do not dissolve in mobile phase

Components of solute remains at original spot

All statements are correct

NaCI is face centered cubic structure. The Na ion at the face of the unit cell is shared by

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2-unit cells

4-unit cells

Only one unit cell

8-unit cells

Which is pseudo solid

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CaF2

Glass

NaCl

CaCl2

London dispersion force are the only forces present among the.

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Molecules of water in liquid state

Atoms of helium in gaseous state at high temperature

Molecule of solid iodine

Molecules of hydrogen chloride gas

The velocity of photon is

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Independent of its wavelength

Depends on its wavelength

Equal to square of its amplitude

Depends on its source

Stronger the oxidizing agent greater is the

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Oxidation potential

Reduction potential

Redox potential

E.M.F of cell

The crystallization of a solid substance is done from a hot saturated solution. The solution is

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Evaporated rapidly

Cooled very slowly to get good crystals

Cooled rapidly to get excellent crystals

Mixed with another miscible solvent

The number of bonds in oxygen molecules.

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One sigma and One pi

One sigma and two Pi

Three sigma only

Two sig and two pi

One dm3 of a buffer solution containing 0.01 M NH4Cl and 0.1 M NH4OH having pKa of 3 has pH.

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4

6

9

10

The oxidation of O -atom in OF3 is.

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-2

+2

-1

+1

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