SSC STENO SCIENCE(CHEMISTRY) QUIZ

Question 1:

Which of the following is the source of solar energy?

Nuclear fission

Nuclear fusion

Artificial radioactivity

X-rays emission

Question 2:

When iron filings and powdered sulphur are mixed together in a china dish

a heterogeneous mixture results.

the constituents present can easily be seen.

the constituents can be separated by a magnet.

all the above are correct.

Question 3:

In pressure cooker , food cooks faster because

Boiling point decreases on increases pressure .

Boiling point increases on increases pressure

Boiling point remain same

Boiling point first increase then decrease on increase of pressure .

Question 4:

Which of the following separation method is used in diagnostic laboratories for blood and urine tests?

Centrifugation

Separating Funnel

Evaporation

Distillation

Question 5:

Chemical equation is balanced to satisfy

Law of definite proportions

Law of conservation of mass

Law of reciprocal proportion

Law of multiple proportion

Question 6:

Who discovered the law of definite proportions ?

Jeremias Richter

Benjamin Franklin

Joseph Proust

John Dalton

Question 7:

Relation between vapour density and molecular weight

Molecular weight = 2 / Vapour density

Molecular weight = 2 X Vapour density

Molecular weight X 2 = Vapour density

Molecular weight = Vapour density

Question 8:

Which of the following term change with change in temperature ?

Mole Fraction

Molarity

Mass percentage

Molality

Question 9:

Which one of the following process is NOT useful for purification of solid impurities ?

Distillation

Sublimation

Crystallization

All of the above

Question 10:

Which of the following is incorrect about solids?

They possess definite shape

They possess definite volume

They can take up the shape of container in which they are placed.

They cannot be compressed