Question # 1

Which one of the following is an organic compound?

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Calcium carbide

Calcium cyanide

Carbon disulphide

None of these

Which of the following tests helps to distinguish between alkyne and alkene?

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Lucas test

Tollen's reagent test

Baeyer's test

Fehling's solution test

Amino acid which has cyclic structural is

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Proline

Valine

Alanine

Glutamic acid

The highest temperature in which a substance can exist as a liquid is called its

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Absolute temperature

Critical temperature

Maximum temperature

Body temperature

Two substances that have the same crystal structure are said to be

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isomorphous

anisotropic

isotropic

polymorphous

The number of Cl- ions per unit cell of NaCl are

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6

4

2

8

What is true about an alcohol and phenol

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Both are more acidic than water

Both react with NaOH

Both produce CO2 with Na2CO3

Both, produce H2 with Na

Which of the following belongs to alkaline earth metals

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Cu

Zn

Sn

Mg

The number paper industries in Pakistan are:

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30

25

35

20

Test of incomplete combustion of petrol in the presence of

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CO₂

SO₂

NO₂

Co

Which of following is NOT use the polyvinylacetate (PVA)

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An adhesive material

Binder for emulsion

Used as gramophone

None as these

The relative lowering of vapour pressure is equal to the mole fraction of the solute is statement of

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Rault law

Henry law

Dalton law

Grahms law

In azeotropic mixture showing negative deviation form Raoult's law show

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Higher b.p. than either

Lower b.p. than either

No change in b.p.

None of these

CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF₂Cl.

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CHF Cl C FCl

CH Cl CF₂Cl

CHF CF₂Cl

C FCl CF₂Cl

Which period starts from ₁₁Sc to ₃₀Zn ?

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First Period

Second Period

Third Period

4th Period

Ifk_cof a reaction productis verylarge, it indicates that equilibrium occurs :

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With the help of a catalyst.

With no forward reaction.

At a low product concentration.

At a high product concentration.

Atomic number of Al is 13. When it forms ionic bond with oxygen the number of electrons lost by 1 Al atom is

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1

2

3

4

A solution of two component is called

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Binary solution

Dilute solution

Original solution

Standard solution

The limiting line of Blamer series in hydrogen spectrum lies in

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Visible regions

Ultraviolet region

Infrared region

x-rays region

The amino group in 19α-amino acids is primary; only oneα-amino acid has secondary amino group which one is that

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Alanine

Glutamic acid

Glycine

Proline

The degree of polarity of molecule is known as its

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Dipole moment

Moment arm

Bond energy

Ionic character

Which of the following is not a colligative property?

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Depression in freezing point

Elevation of boiling point

Osmotic pressure

Modification of refractive index

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