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ICSE Class 10 Chemistry Question 13 of 23

Solved Sample Paper 1 — Question 4

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4
Question

Question 3(iv)

(a) State whether the following statements are True or False. Justify your answer.

(1) According to Mendeleev, periodic properties of elements are periodic functions of their atomic number.

(2) Non-metals form oxides that are basic in nature.

(b) Write the chemical reaction of Ammonium hydroxide with soluble salt of lead (Pb2+ ion).

Answer

(a) (1) False
Corrected Statement — According to Mendeleev, periodic properties of elements are periodic functions of their atomic weight.

(a) (2) False.
Corrected Statement — Metals form oxide that are basic in nature.

(b) Pb(NO3)2 + 2NH4OH ⟶ Pb(OH)2 ↓ + 2NH4NO3