Question # 1

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

Bohr's model of atom, is contradicted by.

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Planck quantum theory

Pauli's exclusion prinsciple

Heisenberg's uncertainty principle

All of the above

In H2SO4the oxidation number of 'S' is

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+2

+6

+8

+4

Which element has highest ionization potential

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Li

Na

K

Rb

Cadmium has isotopes.

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3

4

5

9

Born Haber cycle is used to determine the

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Lattice energy

Enthalpy of formation

Enthalpy of ionization

Enthalpy of dissociation

A solution has pH zero. Its H+ ions concertation will

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zero

More than unity

Less than unity

Unity only

During the electrolysis of molten NaCI, the ion which is reduce is

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The diffusion of gases at absolute zero will be

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Unchanged

Zero

slightly decreases

Slightly increases

Many elements have fractional atomic masses. This is because

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The mass of the atom is itself fractional

Atomic masses are average masses of isobars

Atomic masses are average masses of isotopes

Atomic masses are average masses of isotopes proportional to their relative abundance

If an endothermic reaction is allowed to take place very rapidly i the air, the temperature fo the surrounding air.

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Remains constant

Increase

Decrease

Remain unchanged

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

What is the mass of aluminium is 204 g of the aluminum oxide Al2O3.

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26 g

27 g

54 g

108 g

When aqueous NaCl is electrolyzed, which of the following ions gas discharged at anode.

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Cl-

OH-

Na+

H+

Which one of the following relationship is correct about energy and frequency.

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E = hv

E = h/v

E = v/h

h = v/E

A substance which rerareds the rate of a reaction is called

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Inhibitor

Activator

Auto-catalyst

None of these

The difference of potential of two electrodes when concentration of solution is 1 M each at 25^oC and 1 atmosphere is called.

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Electrode potential

Standard cell potential

Cell reaction

Cell voltage

Colligative properties are used to determine the

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Freezing points

Boiling point

Atomic mass of an element

Molar mass of solute

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