Balancing of Equations

Q.

Balance the equation: Hydrogen Sulfide gas burns in the air to give Water and Sulfur dioxide.

Q.

The valency of Ca in Ca₃(PO₄)₂ is :

1. 3

2. 2

3. 4

4. 8

Q. What will be the values of the coefficients x, y and z if the given reaction is balanced?

${\text{xFeCl}}_3+\text{yMgO}\to {\text{Fe}}_{\text{2}}{\text{O}}_3+{\text{zMgCl}}_2$

1. x = 2, y = 3, z = 3
2. x = 2, y = 4, z = 3
3. x = 3, y = 2, z = 2
4. x = 3, y = 2, z = 3

Q.

Write a chemical equation in symbols and formulae for the following word equation.

$\mathrm{Iron}+\mathrm{Sulphur}\to \mathrm{Iron}\left(\mathrm{II}\right)\mathrm{sulphide}$

Q.

Complete and balance following equations ${\mathrm{N}}_2+{\mathrm{H}}_2\to$

Q.

A balanced chemical equation obeys the law of conservation of mass.

1. True

2. False

Q.

_______ + heat $⟶K_{2}Mn{O}_4+Mn{O}_2+O_2$

1. $2KMn{O}_4$

2. $KMn{O}_4$

3. $K_{2}Mn{O}_4$

4. $2K_{2}Mn{O}_4$

Q.

The value of $x$ in the following reaction is ______.

$2Na+2H_{2}O\to xNaOH+H_2$

1. 1

2. 2

3. 3

4. 4

Q.

Balance the following chemical equations: $\mathrm{NaCl}+{\mathrm{AgNO}}_3\to \mathrm{AgCl}+{\mathrm{NaNO}}_3$

Q. Analyse the reaction given below:

${\text{CaCO}}_3\text{(aq)}$ + ${\text{H}}_2\text{O}\text{(aq)}$ + ${\text{CO}}_2\text{(g)}$ $\to$ ${\text{Ca(HCO}}_3{)}_2\text{(aq)}$

If X is the total number of oxygen atoms and Y is the total number of carbon atoms present in the chemical reaction after balancing, then determine X + Y.

1. 8
2. 9
3. 12
4. 16

Q. Estimate the value $x$ to balance the given equation.

$M{g}_3{N}_2\left(aq\right)+x{H}_{2}O\left(l\right)\to 3Mg\left(OH{)}_2\right(aq)+2N{H}_3(g)$

1. 6
2. 8
3. 2
4. 4

Q.

Balance the following chemical equations and identify the type of chemical reaction.

${\mathrm{TiCl}}_4\left(\mathrm{l}\right)+\mathrm{Mg}\left(\mathrm{s}\right)\to \mathrm{Ti}\left(\mathrm{s}\right)+{\mathrm{MgCl}}_2\left(\mathrm{s}\right)$

Q. The valency of calcium in calcium hydroxide is ____.

1. 1
2. 2
3. -1
4. -2

Q. What will be the values of the coefficients x, y and z if the given reaction is balanced?

${\text{xFeCl}}_3+\text{yMgO}\to {\text{Fe}}_{\text{2}}{\text{O}}_3+{\text{zMgCl}}_2$

1. x = 2, y = 3, z = 3
2. x = 2, y = 4, z = 3
3. x = 3, y = 2, z = 2
4. x = 3, y = 2, z = 3