Rewrite the following choosing the correct word from each pair given in brackets:

The hydrocarbons containing at least one carbon to carbon _______________ (double/triple) bond are called __________(alkenes/alkynes).They have the general formula C_nH_2n.These were previously called ______________(olefins/paraffins). When this compound is treated with ____________(bromine/lime) water, decolourisation occurs because it is _____________(saturated/unsaturated).

An organic compound (A) of molecular formula C₂H₆O on oxidation with alkaline KMnO₄ solution gives an acid (B) with the same number of carbon atoms. Compound A is used as an antiseptic to sterilize wounds, in hospitals. Identify A and B. Write the chemical equation involved in the formation of B from A.

C₂H₆O is the molecular formula for two compounds A and B. They have different structural formula.

i) What is this phenomenon known as?

ii) Give the structural formula of A and B.

iii) Write down their common and IUPAC names.

iv) Mention the functional groups of A and B.

Identify the compounds using the clues given below:

i) This is a dark coloured syrupy liquid containing 30% of sucrose.

ii) During manufacture of ethanol this is added as food for yeast.

iii)This enzyme converts sucrose into glucose and fructose.

iv) This compound contains 95.5% ethanol and 4.5% water.

v) This compound contains 100% pure alcohol.

Read each description given below and say whether it fits for ethanol or ethanoic acid.

i) It is a clear liquid with a burning taste.

ii) It is used to preserve biological specimens in laboratories.

iii) It is used to preserve food and fruit juices.

iv) On cooling, it is frozen to form ice flakes which look like a glacier.