Question # 1

The following statements are true except one which one.

Choose an answer

Carburizing does not harden a steel

Flame and induction hardening require the use of hard enable steels.

Quench –hardened steel does not require tempering to present brittleness

None of these

Purpose of sizing is.

Choose an answer

To increase the strength

To improve formation

To increase resistance toward water

To remove wastes

The unit of nucleic acid having base sugar combination is called.

Choose an answer

Nucliec acid

Nucleoside

Nucleotide

None of these

Which of the following has highest ionization energy.

Choose an answer

Oxygen

Argon

Barium

Caealum

Which of the following is NOT true 7 ceramic materials are.

Choose an answer

Hard, have high densities high compressive strength and very good thermal resistance and strength at higher temperature Silicon

Hard, have low densities high compressive strength and very good thermal resistance and strength at higher temperature.

Hard, have low densities low compressive strength and very good thermal resistance and strength at higher temperature.

Hard, have low densities' high compressive strength and very good thermal resistance and strength at higher temperature.

Which of the following is the major process when neopentyl bromide is dehydrogenate with alcoholic potash.

Choose an answer

2- methyl -1- butene

2- methyl- 1- butene

2,3 -dimethyl butene

2- butene

The units of coefficient of viscosity are.

Choose an answer

kg m-1 n-1

gm -1, s-1

kgm-1, min -1

None of the above

Finely divided iron combines with CO to give.

Choose an answer

Fe(CO)5

Fe2(CO)9

Fe(CO)12

Fe(CO)6

For an average exposure of 8 hours per day, the maximum permissible concentration limit of CO in the atmosphere is.

Choose an answer

50 ppm

500 ppm

10³ ppm

20 ppm

Which ionization Potential in the following equations involves the greatest amount of energy.

Choose an answer

Na = Na+ + e

K = K+ +e

C2+ = C3+ +e

Ca+ = Ca2+ + e

The maximum covalence of an element equal to.

Choose an answer

The number of unpaired d electrons

The number of paired p electrons

The number of unpaired a and P electors

The actual number of a and P electrons in the outermost shell

What is the most undesirable of all the elements commonly found in steels.

Choose an answer

Sulphur

Phosphorus

Silocn

Magnesium

Sulphate ores of aluminium

Choose an answer

Alumite

Cryolite

Fekdsper

Kaolin

According to CFT the metal ligand bond is considered to be ionic to presentage.

Choose an answer

100%

90%

50%

70%

Which of the following is the statement of third law of thermodynamics.

Choose an answer

Entroy of perfectly crystalline substance is zero at T = 0

Entropy of a perfectly crystaline substance is zero at standard state conditions

Entropy and enthalpy of a substance become equal at T = 0

Free energy of a crystalline substance is zero at T = 0

J.J. Thomson established certain properties about cathode rays. Which of the following is not related to cathode rays.

Choose an answer

Cathode rays from a gas discharge tube consists of negatively charged particles

Cathode rays are called electrons.

The e/m ratio of cathode rays depends on the gas inside

Cathode rays are affected by electric and magnetic fields.

Hydrogen at the moment of its generation is generally called.

Choose an answer

Protium

Nascent hydrogen

Atomic hydorgen

Heavy hydrogen

Which of the following range is correct for macro analysis.

Choose an answer

Minimum 100 mg

Minimum 10 mg

Minimum 1 mg

Minimum 1000 mg

Which of the following statements is not correct about noble gases.

Choose an answer

Their ionization energies are very high

Their electron affinities are nearly zero

They do not form any chemical compounds

They are not easily liquefied

Which of the following haloacids is stronger acids.

Choose an answer

FCH2COOH

ClCH2COOH

Br CH2COOH

ICH2COOH

Polyethylene Glycols are used in the preparation of which tye of detergetns.

Choose an answer

Cationic detergents

Anionic detergents

Non ionic detergent soaps

None of above

Which of the following solution would exhibit abnormal colligative proportions.

Choose an answer

0.1 M NaCl

0.1 M urea

0.1 M sucrose

0.1 M glucose

The number of gram equivalents of the solute per dm3 of the solution is called.

Choose an answer

Formality

Normality

Molality

Molarity

Water pollution is due to

Choose an answer

Agricultural discharges

Swages and other wastes

Industrial effects

All the above

Which of the following acids acts as acid waste from coal mines.

Choose an answer

HCl

HNO3

CH3COOH

H3PO4

Each of the following when present at para position decreases the acidic strength of phenol except.

Choose an answer

-NH2

-Cl

CH3O-

CH3-

For highly paraffine , crude oil, the characterization factor will be in range of

Choose an answer

11.5-12.5

12.5-13.0

13.5-14.0

13.4-15.0

HCIO evolves Cl2 and O2 when dissolve

Choose an answer

Ca

Ni

Cu

Any of above

For assciated liquids, the value of d/M n x 10⁸ should be (where d is the density, M is the molar mass and n is the coefficient of viscosity)

Choose an answer

Zero

Infinte

Higher than 70

Less than 70

The IUPAC name of C2H3, CO , OC OC2H5 in

Choose an answer

Prepanoic anhydride

Ethanoic anhydride

Diketoethoxy ether

None of the above

Which of the following analytical techniques can be used to extract metal ion chelates.

Choose an answer

Solvent extractions

Evaporation

GC

Distillation

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