Question # 1

Which of the following statement is not related with nitric oxide.

Choose an answer

It is a colorless and odourless gas

It is produced largely by fuel combustion

It is a brown pungent gas

It is oxidized to NO2

What is the lowest temperature diffusion hardening process and does not require a quench

Choose an answer

Carburizing

Tempering

Nitriding

Melting

The liquor is screened to exclude ________ material

Choose an answer

Fibrous

Polymers

Maltose

Sucrose

In a standard Weaton cell the cathode is

Choose an answer

Cadmium amalgam

Mercury

Platinum

Carbon

Which of the following statements false about transition metals.

Choose an answer

They form complexes

They show variable valency

All transiting metal compounds are paramagnetic

They form coloured ions

Detergents are known to pollute revers and water ways. However, detergents can be made biodegradable and pollution free by taking.

Choose an answer

cyclic hydrocarbon chain

Shorter hydrocarbon chain

Unbranched hydrocarbon chain

Benzenoid hydrocarbons

In the long form of periodic table, elements are arranged according to.

Choose an answer

Increasing atomic number

Decreasing atomic number

Increasing atomic mass

Decreasing atomic mass

Which of the following is a buffer solution.

Choose an answer

CH3COOH + NH4OH

CH3 COOH + HCl

CH3COOH + NaOH

CH3COOH + CH3COONa

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

Which of the following substance is generally not considered an air polutant.

Choose an answer

CO

CO2

SO2

NO2

Which of the following statement is not related with direct use of solar energy.

Choose an answer

It is used for space heating of buildings

It can be used to produce electrical power using photovoltaic cells

It can be used to produce hydrogen gas

It can be used start motor vehicle

Thermogravimetic analysis has application is which of the following fields

Choose an answer

Gravimetric analysis

Discovery of new methods ofseparation

Determination of purity and thermal stability

All above

What is the effect of manganese in cast iron.

Choose an answer

^{To affect the machinability ductility and shrinkage depending on form}

To reduce hardness by combining with sulfur below 0.5% and increase hardness above 0.55

To dioxide molten cast iron

Have no effect

During sintering densification is not due to

Choose an answer

Atomic diffusion

Surface diffusion

Bulk diffusion

Surface tenstion

Which of the following substance is not present in acid rain.

Choose an answer

Sulphuric acid

Nitric acid

Acetic acid

Sulphurous acid

In which of the following compounds does hydrogen bonding occur.

Choose an answer

CCl4

NaH

HI

NH3

The alkaline hydrolysis of fat is know as

Choose an answer

Condensation

Esterification

Saponification

Emulsification

Aluminium hydroxide is.

Choose an answer

An acid

An amphoteric hydroxide

A base

An explosive hydroexide

When calcium is heated in the flame of a Bunsen burner, the colour imparted to the flame is.

Choose an answer

Golden yellow

Brick red

Crimson red

Grassy green

Which of the following statement is not true with respect to hydrocarbons.

Choose an answer

They are gaseous and liquids

They can be saturated or unsaturated

They in air by themselves alone cause harmful effects

They form photochemical oxidants

How many sigma and pi bonds are there in a CO2 molecule.

Choose an answer

2 sigma

2 sigma and 4 pi

2 sigma and 2 pi

4 sigma and no pi

Which of the halogens has lowest bond energy.

Choose an answer

Cl2

Br2

F2

I2

In the electrolysis of alumina, cryolite is added to.

Choose an answer

Lower the melting point of alumina

Increase the electric la conductivity

Minize anodize affect

Remove impurites from alumina

Maximum desirable concentration of fluorides according to international standard is.

Choose an answer

10-100 ppm

1 ppm

100-200 ppm

10-20 ppm

Which idea of envisioned the construction of nano robots

Choose an answer

Building nano materials atom by atom

Destruction of macromolecules to nano ones

Bothe of the above

None of the above

The process of identifying the component present in a sample is called.

Choose an answer

Quantitative analysis

Qualitative analysis

Volumetric analysis

Gravimetric analysis

Which of the following is a thermometric method.

Choose an answer

TGA

DTA

DTG

All

Which of the following radical is a member of VI group.

Choose an answer

Mg²⁺

Na+

K+

NH₄⁺

All above

The normality of 2.3 M H2SO4 solution is.

Choose an answer

0.46 N

0.23 N

2.3 N

4.6 N

As it passes into food chain, the concentration of DDT

Choose an answer

Remains same

Decreases

Increases

Unpredictable

In each period, the most electropositive element belongs to group.

Choose an answer

18

17

1

2

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