Question # 1

Which is the second most abundant element occurring the earth crust.

Choose an answer

Iron

Cu

Cr

Ni

What of the following is not a Lewis base.

Choose an answer

CN-

AlCl3

NH3

ROH

Which of the following enthalpies is always negative.

Choose an answer

Enthalpy of melting

Enthalpy of combustion

Enthalpy of solution

Enthalpy of formation

Which element among the following cannot exhibit variable electronvalency

Choose an answer

₂₉Cu

₅₀Sn

₂₅ Mn

₃₈ Sr

The number of hydrogen bonds boding A _____ T pair is

Choose an answer

1

2

3

4

The interactions in HF are.

Choose an answer

dipole dipole interasctions

Hydrogen bonds

dipole -dipole and dispersion forces

Hydrogen bond and diapersin forces

The gases that are responsible for green house effect are.

Choose an answer

CO2 & CH4

CFC

N2O

All above

The separation efficiency of a column can be expressed in terms of number of.

Choose an answer

Solvents used

Theoretical plates

Stationary phases

Mobile phases

Natural fertilizers are materials derived from

Choose an answer

Plants

Animal

Algae

All of above

Zero group elements are called as

Choose an answer

Inert gases

Rare gases

Noble gases

All of above

Which of the following cause water pollution.

Choose an answer

Smoke

Automobile exhausts

Aeroplanes

Silt and posticides

Which of the following cast irons is a high carbon silicon alloy.

Choose an answer

Gray iron

White iron

Malleable iron

Alloy iron

The particle motion in solids is

Choose an answer

Only vibratory

Only translator

Vibratory and rotatory

Only translatory

Which of the following is a source of energy but does not cause pollution.

Choose an answer

Gaslone

Nuclear power plant

Fossil fuels

Sun

The multiplicity of the electronic state is equal to.

Choose an answer

S + 1

2S + 1

2S - 2

2S + 2

The principal ores of copper are

Choose an answer

Copper sulphides

Copper oxides

Both sulphides and oxides

Copper carbonate

The element having electronic configuration 1s2, 2s2, 3s2, 3p3 is.

Choose an answer

Trivalent only

Tetravalent only

Trivalent and pentavalent

Pentavalent only

The greater stability of bonzyl carbonium ion as compared to t-butyl carbonium ion is due to.

Choose an answer

Inductive effect

Resonance effect

Electrometric effect

All above

Which of the following is not a component of a gas chromatography system.

Choose an answer

Carrier gas

Capillary column

Packed column

Cathode lamp

What is the raw material of sugar industry.

Choose an answer

Sugar cane

Potato

Carrot

Sugar heat

Both A and C

Which of the following statements in incorrect.

Choose an answer

Sodium hydride is ionic

Beryllium chloride is covalent

CCl4 gives a white ppt with AgNO3 solutions.

Bonds in NaCl are non directional

Solid substances consist of an ordered any of ions and solid as a whole is electrically.

Choose an answer

Conductor

Neurtal

Acidic

Basic

O2 molecule is.

Choose an answer

Fermagnetic

Forromagnetic

Paramagnetic

Diamagnetic

The ease of hydrohalogenation of alkyl halide with alcoholic KOH is.

Choose an answer

3^o > 2^o > 1^o

3^o < 2_o <1^o

3^o > 2^o < 1^o

3^o < 2 ^o > 1^o

The mole of photon is known as

Choose an answer

Quantum

Eienstein

Energy Packet

None of the above

Which of the following item is not symmetry element.

Choose an answer

Pllane of symmetry

Inversion centre

Improper rotation

Optical activity

NH3 has a not dipole moment while BF3 has zero dipole moment Thsi is because.

Choose an answer

NH3 is not a planar molecule while BF3 is a planar molecule.

NH3 is a planar molecule, while BF3 is a planner molecule.

Fluorine is more electronetative than nitrogen

Born is more electronegative than nitrogen

Berllium has diagonal relationship with

Choose an answer

Li

Al

B

Na

Phosphorus has the oxidation state of +3 in

Choose an answer

Orthophosphoric acid

Hypophosphoric acid

Metaphosphoric acid

Orthophosphorus acid

Which of the following is not true for metalloids.

Choose an answer

They are borderline elements

They usually act as electron during with non metals.

B, Si, and Ge

They are all solids at room temperature.

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