Question

Hey ! So i was doing this worksheet and i wanted to cross checl and make sure that my answers were correct . So can someone give me answers till Q5 , excluding it . Thank you !

Answer 1

ans.1)

2NaOH+H2SO ➡️ Na2SO4 + 2H2O

ans.i)

NaOH + HCl. ➡️ NaCl+ H2O

ans.2)

Fe2O3+ 2Al. ➡️Al2O3+2Fe

ii.) 4FeSO4. ➡️ 2Fe2O3 +2SO2+ 2SO3

ans.3)

when CaO + 2H2O ➡️Ca(OH)2+ H2

on adding CaO to water Hydrogen gas evolved

ii.) Zn + CuSO4 ➡️ ZnSO4+Cu

as znic is higher in reactivity series then copper it replaces copper from copper sulphate and give ZnSO4 and metal cu.

ans.4)

2Fe + 3H2O ➡️ Fe2O3 + 3H2

CS2+ 2O2. ➡️ CO2 + SO2

3Mg + N2. ➡️ Mg3N2

Hope it useful to you.