Question

Q1. State True or False. Correct the false statements.
a) Sodium is less reactive than iron.
b) Metals are brittle.
c) Negatively charged ions are called cation.

Q2. Complete and balance the following equations.
a) Na + O2—> ________
b) Na + H2O ——> _______+________
c) Al + HCl ——-> _________+________
d) Al + NaOH ———> _________+_______
e) Zn + NaOH——-> _________+________
f) Fe +CuSO4 ——> _________+________

Answer 1

a) Sodium is less reactive than iron. False

b) Metals are brittle. False

c) Negatively charged ions are called cation. False

Q2. Complete and balance the following equations.

a)2 Na + 2O2—> _____2Na2O___

b)2 Na +2 H2O ——> __2_NaOH____+____H2____

c)2 Al + 6HCl ——-> ___2_AlCl3_____+_____3_H2__

d) Al + NaOH ———> ___2_NaAlO3_____+___3_H2___

e) Zn + 2NaOH——-> _____Na2ZnO2____+___H2_____

f) Fe +CuSO4 ——> ___FeSO4______+__Cu______

Explanation:

• The chemical reaction is an example of of conservation of material. As a result of this we should always balance the chemical reaction so that the number of of molecules of of each substance in the reactant should be equal to the number of molecules of each iron of the the product. sodium is more brittle as compared to iron

• metals are non brittle. The negative charge Ion is known as anion

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Answer 2

Answer:

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