DELHI POLICE HEAD CONSTABLE AWO/TPO CHEMISTRY QUIZ

Question 1:

Which of the following elements do not show variable oxidation state?

s-block elements

p-block elements

d-block elements

f-block element

Question 2:

Which one of the following element's isotope is used in the treatment of cancer?

Uranium

Cobalt

Sodium

Iodine

Question 3:

Which of the following is the metal?

Diamond
Iodine
Helium
Germanium
Copper

Only 5

1,2,3

Both 3 and 4

1,2,3,4,5

Question 4:

Which one of the following is not used as a raw material in the manufacture of glass ?

Soda

Alumina

Borax

Gypsum

Question 5:

Which of the following is the crystalline solid?

Polyurethane
Copper
Benzoic acid
Teflon
Potassium nitrate

1,2,3,4

2,3,4

3,4,5

2,3,5

Question 6:

Sometimes we find a reddish brown coating on the grills , railway tracks , cars etc .This coating is due to formation of---

Alloy

Rust

Dust

Iron

Question 7:

Which of the following metals will melt if you keep it on your palm?

Gallium

Caesium

Both 1 and 2

Only 2

Question 8:

Which one of the following is the chemical formula of Washing Soda ?

NaHCO₃

Na₂CO₃.10H₂O

Na₂CO₃.5H₂O

NaOH

Question 9:

Silver bromide is stored in dark bottles because

It undergo oxidation in presence of light

It undergo decomposition in presence of light

It undergo reduction in absence of light

It is highly reactive in presence of light

Question 10:

Which of the following metals float on water?

Calcium
Magnesium
Zinc
Lead

1,2

2,3

Only 1