11.4 Alkynes — Chemistry STD 10 — Question

State what you see, when siIver nitrate solution is added to dilute HCl.

Propane burns in air according to the following equation :
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.
What volume of propane is consumed on using 1000 cm³ of air, considering only 20% of air contains oxygen?

Write the equation for:
The reaction between hydrogen chloride and ammonia.

(a) What do you understand by the term roasting of ore?
(b) What is the importance of roasting in the extraction of metals?

Differentiate between hydracids and oxy-acids. Give examples.

Give one test to distinguish between the following pair of chemicals.
Iron (III) Chloride solution and copper chloride solution.

State your observation of the following case :
When calcium hydroxide is heated with ammonium chloride crystals.

Differentiate between:
Action on indicators or dry ammonia gas and aqueous ammonia

A white solid A when heated with sodium hydroxide solution, gives a pungent gas B, which turns red litmus blue. The solid, when dissolved in dilute nitric acid and treated with silver nitrate gives a white precipitate of C which is soluble in an ammonia solution.