Question # 1

According to the Langumir isotherm , when the pressure of the gas is very large, the adsorption.

Choose an answer

Is directly proportional to pressure

Is inversely proportional to pressure

Is directly proportional to the square of the pressure.

Is independent of pressure

Which of the following compounds has highest dipole moment.

Choose an answer

Dichloromethane

Chloroform

Chloromathane

All above

Which of the following is the weakest base.

Choose an answer

KOH

NaOH

LiOH

RbOH

Which one of the following has the biggest electron affinity.

Choose an answer

F2

Cl2

Br2

I2

Pick out the incorrect statement.

Choose an answer

Red phosphorus consists of a complied chain structure and black phosphorus has a layer structure.

Nitrogen shows a little tendency for catenation, because N-N a single bond is very strong.

The xamimum number of covalent bonds formed by nitrogen is four, since it has no d-orbitals in its valence shell

The group 15 elements do not form M5+ ions, but +5 oxidatin state is realized only through covalent bonding.

Setting of cement is improved by

Choose an answer

Lime stone

Clay

Gypsum

Water

Blue color of glass of due to the presence of .

Choose an answer

Cobalt (II)

Chromium (III)

Iron (III)

copper (II)

Example of linear geometry

Choose an answer

XeF2

F2 and HgCl2

CdI2 AND Ag Cl3

All of the above

Amino acids have

Choose an answer

Acidic group

Basic group

Both of these

None of these

Codon for amino acid glycinc is not represented by base pair

Choose an answer

GCA

GGC

GGA

GGU

The polarity of bonds can lead to polarity of molecules and affect

Choose an answer

Melting point

Boiling point

Solubility

All of above

Bromine number is measure of.

Choose an answer

Paraffins

Unsaturates

Saturates

None of these

Identify a dye which was ot originally obtained from plant source.

Choose an answer

Alizarin

Tyrian purple

Indigotin

Quercitrin

What % if nickel is present in the major ore Pentlandite.

Choose an answer

22%

18%

14%

10%

Which of the following factors does not effect the rate of the reaction.

Choose an answer

Pressure

Temperature

Concentration

Catalyst

All of the above

The liquor is screened to exclude ________ material

Choose an answer

Fibrous

Polymers

Maltose

Sucrose

Which of the following statement is not correct regarding galvanic cells.

Choose an answer

Oxidation occurs at the anode

Ions carry current inside the cell

Electrons flow around the external circuit. form cathode to anode

When the e.m.f. of the cell is positive cell reactionis spontaneous

The magnitude of electron affinity depends on.

Choose an answer

Atomic size

Nuclear charge

Electronic configuration

All of the above

Which of the following factors effect the strengths of acids and bases.

Choose an answer

Inductive effect

Romance effect

Hydrogen effect

All above

The velocity possessed by maximum fraction of molecules at a given temperature is called.

Choose an answer

Average velocity

Root mean aquare velocity

Most probable velocity

None of the above

The vapours attacks the eyes and mucous membrane of nose and throat

Choose an answer

F

Cl

I

Br

Dry distillation of amino acids with barium hydroxide yields.

Choose an answer

Acids

Amines

Alcohols

Hydroxy acids

Pick out the incorrect statement for XeF4

Choose an answer

XeF4 disproportionate violently with water

It is used as fluorinating agent

It has octahedral structure for geometry

It oxidizes I to I₂

Smoke is a dispersion of

Choose an answer

Gas in gas

Gas in solid

Solid in gas

Liquid in gas

A mixture of ethyl iodide and n-propyl iodide is subjected to Wurts reaction. The hydrocarbon that will nto be formed is

Choose an answer

n-butane

n-propane

n-pentane

n-hexane

Carbon in wrought iron is present as

Choose an answer

Silicon carbide

Iron carbide or comentite

Graphite

Partly as iron carbide and partly as graphite

Pick out incorrect statement about K2Cr2O7

Choose an answer

It oxidizes acidified solution H2SO4 to S

It oxidizes KI to I2

It oxidizes HCl to Cl2

It gives oxygen, when treated with cold conc. H2SO4

Dyes which can be applied to cellulosic fibre from water solution are called.

Choose an answer

Ingrain dyes

Substantive dyes

Mordant dyes

Vat dyes

Which of the following is capable of shown g optical isomersm.

Choose an answer

CH3COCOOH

CH3CHOHCOOH

Botha a and b

All of these

During the preparation of soap the liquid separated by distillation is

Choose an answer

Sodium hydroxide

Oil

Fats

Glycerol

Among the elements of second period the element with highest melting point belongs to group.

Choose an answer

1

14

17

18

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