Chemical Reactions and Equations Quiz 4

Question 1

When iron nail dipped in $CuSO_4$ the nail becomes brown due to

Accepted Answer

deposition of copper on iron

Answer

dissolution of iron

Answer

reduction of iron

Answer

oxidation of Cu

Question 2

The reagent used to remove the colour of the matter is called

Accepted Answer

bleaching agent

Answer

chlorinating reagent

Answer

oxidising agent

Answer

reducing agent

Question 3

The number of molecules present in 1g of hydrogen

Accepted Answer

$3\times10^{23}$

Answer

$6\times10^{23}$

Answer

$1\times10^{23}$

Answer

$2\times10^{23}$

Question 4

Heating of which of the following compounds gives acidic and basic oxide?

Accepted Answer

$CaCO_3$

Answer

$Pb(NO_3)_2$

Answer

$AgCl$

Answer

All of these

Question 5

Choose double displacement reaction &hellip;&hellip;&hellip;&hellip;&hellip;&hellip;&hellip;.

Accepted Answer

$XY+AB\longrightarrow AX+BY$

Answer

$X+YZ\longrightarrow XZ+Y$

Answer

$X+Y\longrightarrow XY$

Answer

$XYZ\longrightarrow XY+Z$

Game Settings