The diagram shows an experimental set up for the laboratory preparation of a gas known as marsh gas. It is also present in the air exhaled by animals whose food contain cellulose. Study the diagram and answer the following.

(a) Name the gas collected in the jar.

(b) Write a balanced chemical equation for the above preparation. How is the gas being collected?

(c) Name the type of reaction taking place in this. Why this particular reaction is taking place in this?

Complete the following by choosing the correct answer from the bracket.

(a) On moving down the group electron affinity …………… (increases/decreases).

(b) The functional group present in acetic acid is …………… (-COOH/-OH/-CHO)

(c) …………… (Concentrated sulphuric acid/Dilute sulphuric acid) is a weak acid and a good electrolyte.

(d) Compounds which contains one —COOH group are known as …………… (monocarboxylic acid/dicarboxylic acid).

(e) Quicklime is not used to dry HCl gas because CaO is …………… (alkaline/acidic) in nature.

Identify the following

(a) The reaction by which salt and water is formed.

(b) The metal which is kept in kerosene oil due to its high reactivity.

(c) A base which is soluble in water.

(d) A gas is evolved when liquor ammonia is exposed to air.

(e) A colourless gas which becomes reddish brown when it comes in contact with atmosphere.

(a) Draw the structural formula for the following.

(1) But-1-ene

(2) Butanoic acid

(3) Propanol

(b) Name the following organic compounds in IUPAC system