Question # 1

Which of the following statements are correct for Linear polymers.

Choose an answer

Linear polymers may be condensation as well as addition polymers

Structure is well packed in nature

Linear polymers have higher density higher melting point and higher tensile strength

All are correct

Which of the following is not a characteristic of phthalocyanine dyes.

Choose an answer

They are metal complex

the are insoluble in water

They have porphin nucleus

They are used in photographic plates

Which of the following is most soluble in water.

Choose an answer

BaSO4

Sr SO4

CaSO4

MgSO4

Which of the following physical property forms the basis of radio chemicals methods of analysis.

Choose an answer

Absorption of light

Emission of light

Radioactivity

Thermal conductivity

The minimum amount of energy that the reacting molecules must posses at the time of collations in under to produce effective collisions is called.

Choose an answer

Free energy

Threshold energy

Activation energy

External energy

The hybridization of S in SO2 is.

Choose an answer

sp

sp2

sp3

dsp2

The formation of daughter DNA's from parent DNA is called.

Choose an answer

Transalation

Transcription

Reproduction

Replication

Which of the following solids is a better conductor of electricity.

Choose an answer

Pore NaCl cyrstal

Diamond

Graphite

Marble pieces

Which of the following test is not shown by proteins.

Choose an answer

Xanthoproten test

Ninhydrin test

Hopkin cole test

Muliken Barker test

The first step of formation of sugar is

Choose an answer

Extraction

Washing

Cutting

Clarifying

The brown colour of the pulp obtained from chemical pulping is due to the present of

Choose an answer

Chlorine

Residual lignin

Sodium hydochlorite

All above

Borax exist in the form

Choose an answer

Ordinary borax

Octahdral borax

Borax glass

All above

Group VA of the periodic table consist of elements.

Choose an answer

3

4

5

6

The important condition for the formation of chemical bond is that.

Choose an answer

Their electron clouds should not diffuse

Both atoms should have high electron affinites.

Both atoms should have same electronegativities

The process should be accompanied by the lowering in potential energy.

A catalyst

Choose an answer

Actually participates in the reaction

Changes the equilibrium concentration of the products

Does not affect a reaction energy path

Always decreases the rate for a reaction

In propagation step the reaction intermediate of radical polymerization is

Choose an answer

Carbocation

Carbonion

Free radical

Carbene

Molten iron withdrawn from the blast furnace is called.

Choose an answer

Wrought iron

Pig iron

Bessemer iron

Stainless steel

The function of boiling the sodium extract with conc. HNO3 before testing the halogens is

Choose an answer

To make solution clear

To make the solution acidic

To bring common ion effect

To destroy CN- and S2- ion

Compounds formed when noble gasses get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are called.

Choose an answer

Interstitial compounds

Hydrates

Clathrates

Picrates

The main active contaminants of uranium processing are.

Choose an answer

U - 235

U-238

Pu -234

All above

The ions Sc3+ , Ca2+ and K+ have same electronic configuration as that of.

Choose an answer

Neon

Argon

Krypton

Xenon

Brass is an alloy of

Choose an answer

Copper and tin

Copper and zinc

Aluminium and nickel

Leed and tin

Which of the following method is used to separate small molecules form the larges molecules from the larger molecules in diffusing through a membrane.

Choose an answer

Dialysis

HPLC

FPLC

TLC

Which of the following statement is not correct regarding the constant R . and in ideal gas equation PV= nRT

Choose an answer

Its value in independent of temperature

Its value is independent of pressure

In SI Units its value is 8.314 K^-1 mol^-1

It is called the universal gas constant per molecule.

Used in TV sets and sound movies to give ready response to electrical potential

Choose an answer

He

Ne

Ar

Kr

The range of sound pressure for uncomfortable level is.

Choose an answer

80 - 90 dB

100 - 120 dB

130-140 dB

All above

The angle between corresponding planes forming the external surfaces of the crystal remains constant for a given substances This is known as.

Choose an answer

Steno's law

Henry's law

Bragg law

Pascal law

Cytosine a pyrimidine base pairs with

Choose an answer

Guanine

Thymine

Adenine

Any of these

The main constituent of glass is.

Choose an answer

Silica

Silicon

Magnesia

Alumina

Sodium metal cannot be stored under

Choose an answer

Hexane

Benzene

Kerosene

Ethanol

In 1952 who popularized the use of CFT for inorganic chemist

Choose an answer

Bethe

Orge

Van Vleck

Werner

More Classes

Other Links

PPSC Chemistry Full Book Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer