Fill up the blank: CaC₂ + N₂ → __________ + C

Write the name and formula of an organic fertiliser produced from ammonia. OR Write down the formula of the black precipitate formed when H2S gas is passed through an aqueous solution of silver nitrate.

The gas which is identified by using Nessler's reagent is (a) NO2 (b) H₂S (c) HCl (d) NH3

The substance used for drying ammonia gas is: (a) CaCl₂ (b) CaO (c) H₂SO₄ (d) P₂O₅

What will be the colour of the solution formed when excess aqueous ammonia is added to aqueous copper sulphate solution? (a) Yellow (b) Orange (c) Green (d) Deep blue

Write the formula of the black precipitate formed when H₂S gas is passed through an aqueous solution of lead nitrate.

Fill in the blank: 2NH₃ + CO₂ → ______ + H₂O

Write the names of the chemicals used and the balanced chemical equation in the industrial production of urea.

Why is concentrated H2SO4 not used to dry ammonia gas ?

What colour is produced when H₂S gas is passed through a solution of potassium dichromate acidified with dilute sulphuric acid? (a) Orange (b) Violet (c) Green (d) Deep blue

For the preparation of N2 gas in the laboratory, the mixed aqueous solution of which of the following two compounds is used? NaNO2 and NH4Cl NaNO3 and NH4Cl NaCI and NH4NO3 NaNO3 and NH4NO3

Write the name of a gas that can be prepared using Kipp's apparatus. Write the balanced chemical equation for the reaction of preparation of the gas. [1 + 1]