which ofthe following ions will cause hardness in water

Which ofthe following ions will cause hardness in water sample?

A. $$C{a^{2 + }}$$

B. $$N{a^ + }$$

C. $$C{l^ - }$$

D. $${K^ + }$$

Answer : $$C{a^{2 + }}$$

Solution :
Presence of calcium and magnesium salts in the form of hydrogencarbonate, chloride and sulphate in water makes water 'hard'.

Releted MCQ Question on
Inorganic Chemistry >> Hydrogen

Releted Question 1

$$HCl$$ is added to following oxides. Which one would give $${H_2}{O_2}$$ ?

A. $$Mn{O_2}$$

B. $$Pb{O_2}$$

C. $$Ba{O_2}.8{H_2}O$$

D. $$N{O_2}$$

View Answer

Releted Question 2

Heavy water is

A. $${H_2}{}^{18}O$$

B. water obtained by repeated distillation

C. $${D_2}O$$

D. water at $${4^ \circ }C$$

View Answer

Releted Question 3

The oxide that gives hydrogen peroxide on treatment with a dilute acid is :

A. $$Pb{O_2}$$

B. $$N{a_2}{O_2}$$

C. $$Mn{O_2}$$

D. $$Ti{O_2}$$

View Answer

Releted Question 4

Hydrogen gas will not reduce :

A. heated cupric oxide

B. heated ferric oxide

C. heated stannic oxide

D. heated aluminium oxide

View Answer

Which ofthe following ions will cause hardness in water sample?

Releted MCQ Question on
Inorganic Chemistry >> Hydrogen

$$HCl$$ is added to following oxides. Which one would give $${H_2}{O_2}$$ ?

Heavy water is

The oxide that gives hydrogen peroxide on treatment with a dilute acid is :

Hydrogen gas will not reduce :

Practice More Releted MCQ Question on
Hydrogen

Practice More MCQ Question on Chemistry Section

Which ofthe following ions will cause hardness in water sample?

Releted MCQ Question on Inorganic Chemistry >> Hydrogen

$$HCl$$ is added to following oxides. Which one would give $${H_2}{O_2}$$ ?

Heavy water is

The oxide that gives hydrogen peroxide on treatment with a dilute acid is :

Hydrogen gas will not reduce :

Practice More Releted MCQ Question on Hydrogen

Practice More MCQ Question on Chemistry Section

Releted MCQ Question on
Inorganic Chemistry >> Hydrogen

Practice More Releted MCQ Question on
Hydrogen