Word Equation

Q.

Define word equation for chemical reaction by giving an example.

Q.

Why do we need to balance a chemical reaction?

1. Mass should be conserved.

2. To balance number of radicals.

3. To make chemical equation look much better.

4. To increase the mass of products obtained.

Q.

$BariumChloride+AluminiumSulphate\to BariumSulphate+AluminiumChloride$

Which of the following options correctly represents the balanced chemical equation for the above reaction?

1. (aq) + +

2. (aq) + +

3. (aq) + +

4. + +

Q.

A word equation of a chemical reaction is a way to describe chemical reactions using the names of substances involved.

1. True

2. False

Q.

Write the following in the form of a word equation:
Sodium hydroxide reacts with Calcium Bromide to form Calcium Hydroxide and Sodium Bromide.In the formula $CaB{r}_2$​ what does $Ca$ stand for and what is its valency?

1. Sodium Hydroxide + Calcium Bromide $\to$ Calcium Hydroxide + Sodium Bromide; Potassium; 2

2. Sodium Hydroxide + Calcium Bromide $\to$ Calcium Hydroxide + Sodium Bromide; Calcium; 2

3. Sodium Hydroxide + Calcium Bromide = Calcium Hydroxide + Sodium Bromide; Calcium; 1

4. Sodium hydroxide + Calcium Bromide $\leftrightarrow$ Calcium Hydroxide + Sodium Bromide; Calcium; 2

Q.

Balancing the following chemical reactions by identifying the products

(a) CuSO₄$+$+HI $\to$→CuI₂ $+$+_-------

Q. The hydrolysis of water is a type of

1. combination reaction
2. decomposition reaction
3. double displacement reaction
4. displacement reaction

Q.

Barium Chloride + Aluminium Sulphate $\to$Barium Sulphate +Aluminium Chloride

Which of the following options correctly represents the balanced chemical equation for the above reaction?

1. (aq) + +

2. (aq) + +

3. + +

4. (aq) + +

Q.

Write the following in the form of a word equation:
Sodium hydroxide reacts with calcium bromide to form calcium hydroxide and sodium bromide.In the formula $CaB{r}_2$​ what does Ca stand for and what is its valency?

1. Sodium hydroxide + calcium bromide = Calcium hydroxide + sodium bromide; calcium; 1

2. Sodium hydroxide + calcium bromide $\to$ Calcium hydroxide + sodium bromide; potassium; 2

3. Sodium hydroxide + calcium bromide $\leftrightarrow$ Calcium hydroxide + sodium bromide; calcium; 2

4. Sodium hydroxide + calcium bromide $\to$ Calcium hydroxide + sodium bromide; calcium; 2

Q.

Define the term catalyst. Write one example where it is used. [2 Mark]

Q. Identify the general representation of a combination reaction.

1. $\text{A+B+C}\to \text{X+Y}$
2. $\text{AB}\to \text{A+B}$
3. $\text{A+B}\to \text{AB}$
4. $\text{A+B}\to \text{B+C}$

Q.

State your observations when following salts are heated strongly in dry state. Write chemical equations in support of your answer.

Iodine crystals $\left({\mathrm{I}}_2\right)$

Q.

Word equations____balancing.

1. sometimes need

2. do not need

3. require

4. need

Q.

In the formula $CaB{r}_2$​ what does Ca stand for and what is its valency?

1. Calcium +2

2. Calcium -2

3. Calcium +1

4. calcium -1

Q. Electrolysis of water is an example of reaction

1. Decomposition
2. Combination
3. Redox

Q. The process in which the substances undergo decomposition by absorption of electrical energy is called ___________.

1. photolysis
2. electrolysis
3. thermolysis
4. catalysis

Q.

Explain the law of conservation of mass.

Q.

$BariumChloride+AluminiumSulphate\to BariumSulphate+AluminiumChloride$

Which of the following options correctly represents the balanced chemical equation for the above reaction?

1. (aq) + +

2. + +

3. (aq) + +

4. (aq) + +

Q. Represent the following reaction in the form of a chemical equation (balancing not required):

Iron reacts with copper sulphate solution to produce copper and ferrous sulphate.

1. $\text{Fe(s)}+{\text{CuSO}}_4\text{(aq)}\to \text{Co(aq)}+{\text{FeSO}}_4\text{(aq)}$
2. $\text{Fe(s)}+{\text{CuSO}}_4\text{(aq)}\to \text{Cu(s)}+{\text{FeSO}}_4\text{(aq)}$
3. $\text{Fe}+{\text{CuSO}}_4\to \text{Co}+{\text{Fe(SO}}_4{)}_{\text{a}}$
4. $\text{Fe(s)}+{\text{CuSO}}_4\text{(l)}\to \text{Cu(s)}+{\text{Fe(SO}}_4{)}_{\text{{a}(l)}}$

Q. A word equation is a way to describe chemical reactions using the of substances involved.

1. symbols
2. names
3. atoms