Identify the gas evolved and give the chemical test when dilute hydrochloric acid reacts with : (i) Sodium sulphite. (ii) Iron [II] sulphide. Open Answer »
State your observations when dilute hydrochloric acid is added to : (i) Lead nitrate soln. and the mixture is heated. (ii) Copper carbonate. (iii) Sodium thiosulphate. Open Answer »
Fill in the blank : ……………[AgCl / PbCl2], a white precipitate is soluble in excess NH4OH. Open Answer »
Select the correct answer from A, B, C and D : The aim of the Fountain experiment is to prove that : (A) HCl turns blue litmus red (B) HCl is denser than air (C) HCl is highly soluble in water (D) HCl fumes in moist air. Open Answer »
The following questions pertain to the laboratory preparation of hydrogen chloride gas: (i) Write the equation for it’s preparation mentioning the condition required. (ii) Name the drying agent used in the above preparation and give a reason for the choice. (iii) State a safety precaution taken during the preparation of hydrochloric acid. Open Answer »
Identify the acid which on mixing with AgNO3 soln. gives a white precipitate, soluble in excess ammonium hydroxide. Open Answer »
Select from the gases — ammonia, ethane, hydrogen chloride, hydrogen sulphide, ethyne — The gas which produces dense white fumes with ammonia gas. Open Answer »
Study the figure given below and answer the questions that follow : (i) Identify the gas Y. (ii) What property of gas Y does this experiment demonstrate? (iii) Name another gas which has the same property and can be demonstrated through this experiment. Open Answer »
Write the balanced equation for: Action of dilute hydrochloric acid on sodium sulphide. Open Answer »
(i) Identify the gas Y. (ii) What property of gas Y does this experiment demonstrate? (iii) Name another gas which has the same property and can be demonstrated through this experiment.