Question # 1

Among the elements of third period, the element with lowest boiling point belongs to group.

Choose an answer

1

14

16

18

The contact process is mainly used when acid is required for the manufactures of.

Choose an answer

Explosives

Fine chemicals

Lead accumulators

All above

Which of the following solution would have the largest depression in freezing point.

Choose an answer

1% glucose

1 % KCl

1 % AlCl3

1 % BaCl2

Which of the following is the third most abundant element in the nature.

Choose an answer

Oxygen

Sulphur

Aluminum

Hydrogen

Which of the following phenomena is not explained by the classical mechanics.

Choose an answer

Black body radiation

Photoelectric effect

Atomic and molecular spectra

Heat capacities of solids

All of the above

Which of the following steps are involved in the extraction of copper.

Choose an answer

Roasting

Smelting

Refining

All

Enzymes are

Choose an answer

Complex non living compunds

Laving organisms

Complex protein molecules

Bacterial colonies

When a concentrated solute of an electrolyte is diluted.

Choose an answer

Its specific conductance increases

Its equivalent conductance decreases

The specific conductance decreases and equivalent conductance increases

Both specific and equivalent conductance increase

A correct reaction mechanism for a given reaction usually is.

Choose an answer

The same as the balanced chemical equation

Obvious if its heat of reaction is known

Sometimes difficult to prove

Obvious if the activation energy is known

Which of the following statements is not correct with respect to applications of H- bonding.

Choose an answer

It explains the usual b.p. and m.p of certain class of compound.

It explains the solubility of certain organic compounds in hydroxylic solvents

It explains the lack of ideal behavior in gases and solutions

It has stonrg influence on the configuration of certain molecules.

The osmotic pressure of a solution with definite composition.

Choose an answer

Varies directly as the volume and temperature.

Various inversely as the temperature.

Varies inversely as the volume and directly as the temperature.

None of the above

______ is used for Annealing

Choose an answer

Klin

Batch

Converter

Oven

Has maximum property of catenation.

Choose an answer

C

Si

Sn

Pb

The percentage of nitrogen in Urea is _____________%

Choose an answer

46

37

82

50

Which of the following has the highest melting point.

Choose an answer

NaCl

KCl

MgO

BaO

Vitamin D1 is chemically known as

Choose an answer

Ergocalciferol

Tocopherol

Aserphthol

Phylloquinone

Which isotope of hydrogen is radioactive in nature.

Choose an answer

Protium and deuterium

Tritium only

Tritium and deuterium

Only deuterium

The phase rule was deduced by

Choose an answer

Gibbs

Thomson

Troution

Henry

_{Which of the following salt is soluble in water.}

Choose an answer

BaCO3

SrCO3

CaCO3

K2CO3

The pH Value 4.2 is of

Choose an answer

Vinegar

Lemons

Oranges

Tomatoes

Which of the following salt is not used in salt bridge to minimize liquids junction potential.

Choose an answer

KCl

NH4Cl

KNO3

CaCl2

Drying agent which react with CO2 and removes water vapours is.

Choose an answer

CaO

CaCl2

CaCO3

Ca(NO3)2

Which of the following statements is not true with respect to atomic spectroscopy.

Choose an answer

Atoms are simplest form of matter

Atoms cannot rotate or vibrate as molecules do

Only electronic transitions within atoms take place

Band spectra are observed

Water is often treated with chlorine to

Choose an answer

Increases oxygen content

Kill germs

Cause sedimentation

Remove insoluble impurities.

One ppm solution of NaOH Contain 1000 mg of the solute per how much of the volume of the solution.

Choose an answer

1000 mL

100 mL

10 mL

1 mL

Which of the following relation corresponds to Faraday law of electrolysis.

Choose an answer

m = ZI t

E = mc²

E = ho

None of the above

Which of the following dyes belongs to the group of acridine dyes.

Choose an answer

Acriflavin

Alizarin

Indigotin

Cyanine

The range of sound pressure for uncomfortable level is.

Choose an answer

80 - 90 dB

100 - 120 dB

130-140 dB

All above

If steel is heated to a temperature well below red heated and is then cooled slowly the process is called.

Choose an answer

Annealing

Quenching

Tempering

Nitriding

The rise of a liquid in capillary tube is due to.

Choose an answer

Osmosis

Diffusion

Surface tension

Viscosity

The bond order for BO molecule is.

Choose an answer

2.5

3.0

2.0

3.5

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