Question # 1

The electronegativity of the following elements increases in the order.

Choose an answer

C,N, Si, P

N, Si, C,P

Si, P, C, N

P, Si, N, C

In Glass of vitreous state solid the atoms are arranged in.

Choose an answer

Regular fashion

Random fashion

linear fashion

All of these

Which one of the following pairs are chemically dissimilar.

Choose an answer

Na and K

Ba and Sr

Zr and HF

Ca and Zn

In the fourth flotation process for the purification of ores, the ore particles floats because.

Choose an answer

They are light

Their surface is not easily wetted by water

They bear electrostatic charge

They are insoluble

Citral when heated with KHSO4 forms.

Choose an answer

Isoprene

p-cymene

p-menthane

Dipentene

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.

The normality of 2.3 M H2SO4 solution is.

Choose an answer

0.46 N

0.23 N

2.3 N

4.6 N

Which of the following method is based on the solubility difference between the analyte and the unwanted components.

Choose an answer

Distillation

Complex formation

Electrodepostion

Precipitation

a- pinene hydrochloride on warming rdarranges to form bornyl chloride.The rearrangement is known as.

Choose an answer

Pinacol pinacolone

Hofinann

Wager Mecrwein

Wolff

Which of the following source of energy is abundant everlasting and non polluting.

Choose an answer

Nuclear

Electric

Solar

All above

20 micron =____________________ nm

Choose an answer

20 x10^-9

20000

200

20x10⁹

Which of the following does not have an a,b, unsaturated carbonyl group.

Choose an answer

Androsterone

Oestrone

Testosterone

Progesterone

The constant temperature and pressure,the rates of effusion of various gases vary inversely as square root of their denature. This is a statement of.

Choose an answer

Boyle's law

Charles's law

Graham's law

Daltons's law

The common temperature detecting device in DTA are.

Choose an answer

Thermocouples

Thermopiles

Thermistore

All

The size of nanoparticles is between __________ nm

Choose an answer

100 to 1000

1 to 100

0.1 to 10

0.01 to 1

The number of hydrogen bonds boding A _____ T pair is

Choose an answer

1

2

3

4

Which of the following is most soluble in water

Choose an answer

CaSO4

Sr SO4

MgSO4

BaSO4

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

Choose an answer

Carburizing

Tempering

Nitriding

Melting

The common oxidation state of lanthanides is.

Choose an answer

+3

+2

+1

+4

Which of the following electrolytes will be most effective in the coagulation of arsenic sulphide sol.

Choose an answer

NaNO3

AI PO4

MgSO4

K4[Fe(CN)6]

Which of the following cast iron is heat treated for ductility.

Choose an answer

Gray iron

Malleable iron

White iron

None of these

The maximum noise level at which a man can work for 8 hours is.

Choose an answer

80 dB

70 dB

90 dB

60 dB

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

Choose an answer

Solvent extractions

Evaporation

GC

Distillation

The reaction of toluene with chlorine in the presence of light gives.

Choose an answer

Benzoyl chloride

Benzyl chloride

m-chlorotoluene

Mixture of 0 and p -chlorotoluene

________is best in its cleaning action.

Choose an answer

Soap

Detergents

Surfactant

None of these

__________ is used for fruits, vegetables and tobacco

Choose an answer

Potassium Chloride

Potassium Sulphate

Potassium nitraite

All above

Considering the elements F, Cl ,O and N, the correct order of their chemical reactivity in terms of oxidizing property is.

Choose an answer

F > Cl > N

F > O > Cl > N

Cl > F > O > N

O > F > N > Cl

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

Choose an answer

Acriflavin

Alizarin

Indigotin

Cyanine

The quantum yield of a Photo chemical reaction in

Choose an answer

Always less than unity

Always equal to unity

Always greater than unity

Can have any value > 0 depending on the reaction

In glass making the whole combination of ingredients is called a.

Choose an answer

Gangue

Batch

Mixture

None of these

Which of the following metals is the most abundant in the earth's crust.

Choose an answer

Mg

Ca

K

Na

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