Steps for Balancing Chemical Equations

Q. Question 8.3
Write the balanced chemical equation for the following and identify the type of reaction:

Hydrogen (g) + Chlorine (g) $\to$ Hydrogen chloride (g)

Q. 10.0 g of $CaC{O}_3$ on heating gave 4.4 g of $C{O}_2$ and x g of $CaO$. Applying the law of conservation of mass, calculate the mass of $CaO$.

1. 6.5 g
2. 5.6 g
3. 4.2 g
4. 5.3 g

Q. Question 6.3
Balance the following chemical equation:

$\text{NaCl}+{\text{AgNO}}_3\to \text{AgCl}+{\text{NaNO}}_3$

Q. Balance the following equation.
$Cu+HN{O}_3\to Cu(N{O}_3{)}_2+NO+H_{2}O$

Q.

When a glass rod dipped in hydrochloric acid is brought near a jar filled with ammonia, dense yellow fumes are observed.

1. True

2. False

Q. Question 6.2
Balance the following chemical equation:

$\text{NaOH}+{\text{H}}_2{\text{SO}}_4\to {\text{Na}}_2{\text{SO}}_4+{\text{H}}_2\text{O}$

Q. Question 6.4
Balance the following chemical equation:

${\text{BaCl}}_2+{\text{H}}_2{\text{SO}}_4\to {\text{BaSO}}_4+\text{HCl}$

Q. Question 6.1
Balance the following chemical equation:

${\text{HNO}}_3+{\text{Ca(OH)}}_2\to {\text{Ca(NO}}_3{)}_2+{\text{H}}_2\text{O}$

Q.

Balancing of chemical equations is necessary because atoms are neither_____ nor_____ during a chemical reaction.

Q. Find the value of a, b, c, and d in accordance with the law of conservation of mass for the reaction given below.
$aM{g}_3{N}_2+b{H}_{2}O\to cMg(OH{)}_2+dN{H}_3$

1. a, b, c and d are 1, 3, 4 and 2 respectively.
2. a, b, c and d are 2, 6, 3 and 2 respectively.
3. a, b, c and d are 1, 6, 2 and 3 respectively.
4. a, b, c and d are 1, 6, 3 and 2 respectively.

Q. (a) Define Law of conservation of mass along with an
example.
(b) 15.9 g of copper sulphate and 10.6 g of sodium
carbonate were made to react with each other .
As a result, 14.2 g of sodium sulphate and 12.3 g
of copper carbonate were formed. Show that
these results are in accordance with the law of
conservation of mass.

Q.

Write the equation to represent the reaction of Sodium hydroxide (iii) with hydrochloric acid

Q.

The chemical equation doesn't change if all its coefficients are multiplied by a common natural number.

1. True

2. False

Q.

w $C_3{H}_8$ + x $O_2$ $\to$ y $H_{2}0$ + z $C{O}_2$

The above equation represents a balance chemical reaction, the vaule of w+x+y+z is _______.

1. 14

2. 12

3. 13

4. 16

Q. The balanced chemical equation for the thermal decomposition of ferrous sulphate crystals is :

1. $6FeS{O}_4\left(s\right)\stackrel{Heat}{\to }3F{e}_2{O}_3\left(s\right)+S{O}_2\left(g\right)+4S{O}_3\left(g\right)$
2. $2FeS{O}_4\left(s\right)\stackrel{Heat}{\to }F{e}_2{O}_3\left(s\right)+S{O}_2\left(g\right)+S{O}_3\left(g\right)$
3. $3FeS{O}_4\left(s\right)\stackrel{Heat}{\to }F{e}_3{O}_4\left(s\right)+S{O}_2\left(g\right)+S{O}_3\left(g\right)$
4. $FeS{O}_4\left(s\right)\stackrel{Heat}{\to }F{e}_2{O}_3\left(s\right)+S{O}_2\left(g\right)+S{O}_3\left(g\right)$

Q. Complete the given equation:

___________ + $HCl\to N{H}_{4}Cl$

1. $N{H}_3$
2. $C{l}_2$
3. $N_2$
4. $N{H}_4$

Q. The symbol of fluorine is _______.

1. F
2. Fl
3. P
4. Fr

Q. Write a balanced equation when zinc reacts with sodium hydroxide.

1. $2Zn+2NaOH\to 2Na+2Zn(OH{)}_2$
2. $Zn+NaOH\to Na+Zn(OH{)}_2$
3. $Zn+2NaOH\to 2Na+Zn(OH{)}_2$
4. None of these

Q.

Identify the monoatomic and polyatomic ions from the following equation-
$Pb(N{O}_3{)}_2$ + $K_{2}S{O}_4$ $\to$ $2KN{O}_3$ + $PbS{O}_4$

1. Monoatomic ions- ${\mathrm{Pb}}^{+2}$, $K^{+}$
   Polyatomic ions- ${\mathrm{NO}}_3^{-}$, ${\mathrm{SO}}_4^{-2}$

2. Monoatomic ions- ${\mathrm{SO}}_4^{-2}$, $K^{+}$
   Polyatomic ions- ${\mathrm{NO}}_3^{-}$, ${\mathrm{Pb}}^{+2}$

3. Monoatomic ions- ${\mathrm{Pb}}^{+2}$, ${\mathrm{NO}}_3^{-}$
   Polyatomic ions- $K^{+}$, ${\mathrm{SO}}_4^{-2}$

4. Monoatomic ions- ${\mathrm{SO}}_4^{-2}$, ${\mathrm{NO}}_3^{-}$
   Polyatomic ions- $K^{+}$, ${\mathrm{Pb}}^{+2}$

Q. Balance the following equation:
$Fe(S{O}_4{)}_3+N{H}_3+H_{2}O⟶Fe(OH{)}_3+(N{H}_4{)}_{2}S{O}_4$