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)

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.

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.

The structures of six organic compounds are shown:

(a) Identify two of the compounds that are members of the same homologous series but are not isomers.

(b) Which two compounds are isomers of each other?

(c) F can be prepared from D. Give a chemical equation for the reaction.