Chemistry
State giving reasons if:
(a) zinc and aluminium can be distinguished by heating the metal powder with concentrated sodium hydroxide solution.
(b) calcium nitrate and lead nitrate can be distinguished by adding ammonium hydroxide solution to the salt solution.
Analytical Chemistry
ICSE Sp 2025
17 Likes
Answer
(a) No, zinc and aluminium cannot be distinguished by heating the metal powder with concentrated sodium hydroxide solution because both will form a white precipitate which is soluble in excess of sodium hydroxide.
(b) Yes, calcium nitrate and lead nitrate can be distinguished by adding ammonium hydroxide solution to the salt solution because white precipitate will be formed with lead nitrate but no precipitate is formed with calcium nitrate.
Answered By
11 Likes
Related Questions
Rohit has solution X, Y and Z that has pH 2, 7 and 13 respectively.
Which solution:(a) will liberate sulphur dioxide gas when heated with sodium sulphite
(b) will liberate ammonia gas when reacted with ammonium chloride
(c) will not have any effect on litmus paper?
8.2 grams of calcium nitrate is decomposed by heating according to the equation
2Ca (NO3)2 ⟶ 2CaO +4NO2 + O2
Calculate the following:
(a) Volume of nitrogen dioxide obtained at STP
(b) Mass of CaO formed
(Atomic weights : Ca- 40, N-14, O-16)
Draw the electron dot diagram of ammonium ion.
Give balanced equations for the following:
(a) Laboratory preparation of ethyne from calcium carbide.
(b) Conversion of acetic acid to ethyl acetate.
(c) Laboratory preparation of nitric acid.