SSC CHSL GENERAL AWARENESS QUIZ

Question 1:

Which of the following is a chemical change?

Drying of a shirt in the sun.

Rising of hot air over a radiator.

Burning of kerosene in a lantern.

Churning of milk cream to get butter.

Question 2:

Which of the following metals is susceptible to fire if kept in the open?

Potassium

Lead

Lithium

Mercury

Question 3:

A chemical reaction is called ______ reaction when heat is given out.

exothermic

combination

endothermic

decomposition

Question 4:

What happens when white silver chloride is left exposed to sunlight?

White colour silver chloride decomposes to grey colour silver metal and bromine gas

Yellow colour silver chloride decomposes to grey colour silver metal and chlorine gas

White colour silver chloride decomposes to white colour silver metal and bromine gas

White colour silver chloride decomposes to grey colour silver metal and chlorine gas

Question 5:

Which of the following is not a chemical change?

Rising of hot air over a radiator.

Burning of kerosene in a lantern.

Change in the colour of black tea on adding lemon juice to it.

Churning of milk cream to get butter

Question 6:

Which of the following compounds contains an ionic bond?

CHCl

NaCl

NH3

CH3

Question 7:

HF is a liquid and HCl is a gas because

Fluorine form a stronger hydrogen bond than chlorine

Florine is less electronegative

Fluorine forms a weak hydrogen bond than chlorine

Chlorine has smaller atomic radii than Fluorine.

Question 8:

Which one of the following is not the drawback of octet theory ?

This theory does not account for the shape of molecules.

It does not explain the relative stability of the molecules

Some noble gases (for example xenon and krypton) also combine with oxygen and fluorine to form a number of compounds

Sulphur also forms many compounds in which the octet rule is obeyed.

Question 9:

Which among the following is non polar molecule?

$\mathrm{NH}_{3}$

$\mathrm{H}_{2} \mathrm{O}$

$\mathrm{NF}_{3}$

$\mathrm{BF}_{3}$

Question 10:

NaCl is a ionic compound because

It is formed by sharing of electrons

It is formed by transfer of electrons

Both 1 and 2

None of these