Question # 1

As compared to pure atomic orbitals the hybrid orbitals have.

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Low energy

High energy

Same energy

None of these

The diffusion of gases at absolute zero will be

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Unchanged

Zero

slightly decreases

Slightly increases

If the salt bridge is not used between two half cells, then the voltage

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Decreases rapidly

Decreases slowly

Does not change

Drops to zero

When hot saturated solution is cooled very rapidly, we get

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Medium sized crystals

large sized crystals

Premature crystallization of the substance

Old crops of crystals

Chlorine atom and chloride ions.

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Are chemically identical

Are allotropes of chlroin

Have same number of electrons

Have same number of protons

The drying agents used in desiccator is.

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BeCl2

MgCl2

CaCl2

SrCl2

The line of the balmer series in the visible region of the spectrum, but the limiting line, in the series lies in

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Visible region

X-Ray region

I.R region

U.V. region

Lyman series lies in spectral region

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Infrared

Ultra violet

Visible

None of these

Bohr's model of atom is contradicted b y.

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Planck quantum theory

Quantization of energy of electrons

Heisenberg's uncertainty principle

Quantization of angular momentum

Which one of the following substances is not sublime material.

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Iodine

Benzoic acid

Ammonium chloride

Potash alum

Which statement is true about Na and Na+

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size of Na is greater than Na+

Size of Na is smaller than Na+

Both have equal size

Both have same properties

In which system all the three axes are of equal length and all angles are at right angle.

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Cubic

Tetragonal

Orthorhombic

Hexagonal

Which of the following solutions has the highest boiling point

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5.85% solution of sodium chloride

18.0% solution of glucose

6.0% solution of urea

All have the same boiling points

Which of the following molecules has zero dipole moment

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NH₃

CHCI₃

H₂O

BF₃

If the empirical formula of compound is CH2 and its molecular mass is 56 than what is the actual molecular formula of this compound.

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CH2

C2H4

C3H6

C4H8

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

What are the SI units of Van der Waal constant 'a'

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atm dm3 mol-2

atm dm6 mol-2

Nm4 mol-2

Nm mol-1

Diamond is bad conductor because.

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It has a tight structure

It has a high density

It is transparent to light

There are o free electros present in the crystal of diamond to conduct electricity.

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