Question

please tell me class 10​

Answer 1

Answer:

2Na+S------>Na2S

Ticl4+2Mg-------->Ti+2MgCl2

Caco3------->Cao+co2

Fe2O3+2Al-------->2Fe+Al2O3

Answer 2

Answer:

1) $\sf 2Na + S \rightarrow Na_2S$

Combination Reaction

2) $\sf TiCl_4 + 2Mg \rightarrow Ti + 2MgCl_2$

Displacement Reaction

3) $\sf CaCO_3 \rightarrow CaO + CO_2$

Decomposition Reaction

4) $\sf Fe_2O_3 + 2Al \rightarrow 2Fe + Al_2O_3$

Displacement Reaction

Explanation:

1) Check For Na

On RHS, There are 2 atoms of Na and on LHS there is 1. So put a coefficient 2 before Na.

Here, Na and S are joining to form $\sf Na_2S$ so it's combination Reaction.

2) Check for Mg, it's balanced. Now check for Cl, it is 4 on LHS and 2 on RHS. So put coefficient 2 before $\sf MgCl_2$

Now, Mg is unbalanced so add coefficient 2 before Mg on LHS.

Now, Mg is replacing Ti from its salt. In the reaction, so it's displacement Reaction.

3) Here, all elements are balanced so we don't have to do anything here.

Here, $\sf CaCO_3$ is decomposing into CaO and CO2 so it's decomposition Reaction.

4) Here, on RHS there is one Fe and 2 on LHS. So add coefficient 2 before Fe on RHS. Now, there are 2 Al on RHS and one on LHS. So add coefficient 2 before Al on LHS.

Here, Al is displacing Fe from it's salt. So it's displacement Reaction.