Question # 1

The three isotopes of hydrogen differ from one another in

Choose an answer

Atomic number

Number of protons

Nuclear charge

Nuclear mass

What impurity in steel can cause ted shortness which means the steel becomes unworkable at high temperature.

Choose an answer

Sulphur

Silicon

Magnesium

Aluminium

Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water increases as.

Choose an answer

Chloride > Phosphate > Sulphate

Sulphate > Pohosphate> Chloride

Chloride > Sulphate > Phosphate

Phosphate > Chloride > Sulphate

Human hearing is sensitive to frequency in the range of about

Choose an answer

10,000 - 20,000 Hz

10 - 10,000 Hz

16- 20,000 Hz

None of the above

Which of the following pairs shows diagonal relationship

Choose an answer

Li and Mg

Na and K

Zn and Cd

Li and BE

The entropy of the universe

Choose an answer

Tends towards a maximum

Tend towards a maximum

Tends to be zero

Remains constatn

The rate constant for 3rd order reaction has the dimentions of.

Choose an answer

mol-2 s-1

I2 mol-2 s-1

mol I -1 s-1

I-1 mol -1 s-1

A trace constituent is one whose amount in the sample is.

Choose an answer

< 10%

< 010%

< 1.0%

< 0.01 %

Layer of the C -atom in graphite are hold together by

Choose an answer

Covalent bonds

Free electrons

Ionic bond

Van Dar Waals forces

Iron which contains up to 1% carbon is called.

Choose an answer

Steel

Cast iron

Wrought iron

Pig iron

Which is the correct order of wave number of the following redistions.

Choose an answer

X-rays > uv > Infrared > visible> radio waves

X-rays > uv > visible > Infrared > radio waves

X-rays > radio waves > uv > visible > Infrared

X-rays > Infrared > uv> visible > radio waves

Helium contents in the atmosphere by volume.

Choose an answer

0.0005%

0.0015%

0.0001%

0.00001%

Which of the following will be most effective int he coagulntion of

Fe (OH)3 sol.

Choose an answer

NaCl

MgSO4

AlCl3

Mg3 (PO4)2

Which of the following process is involved in the purification of crude metals.

Choose an answer

Liquation process

Oxidation process

Distillation process

Electro refining

Which of the following does not belong in the group of herocyclic dyes.

Choose an answer

Acridine

Cyanine

Methylene blue

Amido black

Correct order of increasing ______ I effect of groups is

Choose an answer

----- NO2 >-----------CN > ------------COOH > -------------F

--------F > -------------COOH>----------CN>--------NO2

-----F> -------------CN>--------NO2 > COOH

-------CN > ------------COOH > -----------NO2 >----------F

The temperature at which the vapour pressure becomes equal to external pressure is called.

Choose an answer

Saturation point

Critical temperature

Consolute temperature

Boiling point

Bromination of n-butane produces.

Choose an answer

I-bromobutane as the major product

2- bromobutane as the major product

Both I - bromo and 2- bromobutane with equal percentage

Both i-bromo and 2-bromo products whose percentage depends upon temperature.

Which is true for DDT it is.

Choose an answer

Not a pollutant

An antibiotic

A non degradable pollutant

A pesticide

The isoelectric point of a protein or amino acid to.

Choose an answer

pH at which it does not have any charge

pH at which it does not have not charge and does not migrate in electric field

pH at which the concentration of cation is greater than amino

pH at which the concentration of anion is greater than cation

Which of the following is not a property of Cr.

Choose an answer

it is brilliant silvery metal

it is malleable

It can take very high polish

Its surface is tarnished easily

Which of the following statement is not true regarding Open Hearth process.

Choose an answer

No iron is lost

The process is economical and simple

Steel obtained is of high quality

Scrap iron cannot be used in this process.

The pH of milk is

Choose an answer

6.0

6.5

7.0

7.5

Which of the following technique is used to separate substance based on their charge to mass ratio.

Choose an answer

HPLC

HPTLC

GC

Electrophoresis

SO2 is generated from which of the following industry.

Choose an answer

Drying and packing

Paper

Pulp

paper and pulp

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

Choose an answer

1% glucose

1 % KCl

1 % AlCl3

1 % BaCl2

The energy gap between two bands so large that it effectively prevents the promotion of electron from the lower to the higher band such energy gap all called.

Choose an answer

Ionization zone

Dissociation zone

Distinction zone

Forbidden zone

Which one of the following has the biggest electron affinity.

Choose an answer

F2

Cl2

Br2

I2

Which of the following statements is not correct with respect to applications of Hammett equations.

Choose an answer

It develops a quantitative relationship between structure and reactivity

This equation on can be used to calculate the value of pK_a

This equation does not help to calculate the rate of some reactions

This equation has mechanistic implications

Which of the following term refers to nearness between several measurements of the same quantity.

Choose an answer

Accuracy

Precision

Standard error

Standard error of mean

Volta metric technique using a dropping mercury electrode is called.

Choose an answer

Amperometry

Coulometry

Polarography

Potentiometry

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