Question

give the correct answer..?​

Answer 1

Explanation:

In a displacement reaction, a more reactive element replaces a less reactive element from a compound. ... In a displacement reaction, one displacement takes place. A + BX → AX + B. In a double displacement reaction, two displacements take place to complete the reaction.

Magnesium is highly reactive in nature. - When magnesium metal reacts with very dilute nitric acid it gives magnesium nitrate (Mg(NO3)2). Along with magnesium nitrate highly flammable hydrogen gas (H2) is also produced. Thus, magnesium on reaction with very dilute HNO3 gives H2.

Answer 2

$\large\underline\mathfrak\red{Q7. Answer \: :- }$

1) Magnesium reacts with dilute HNO3

$\bf{Mg + 2HNO_3 → Mg(NO_3)_2 + H_2 }$

2) Sodium reacts with water

$\bf{2Na + 2H_2 O → 2NaOH + H_2 }$

3) Zinc reacts with dilute HCL

$\bf{Zn + HCl → ZnCl_2 + H_2 }$

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