Class X

Soaps are formed by saponification of
  1. alcohols
  2. glycosides
  3. simple esters
  4. carboxylic acids
Covalent compounds
  1. have high melting and boiling point
  2. are mostly soluble in water
  3. are formed between atoms of metals and non-metals
  4. are formed by the sharing of electrons in the bonding atoms.
The substnace not responsible for the hardness of water is
  1. Sodium nitrate
  2. calcium hydrogen carbonate
  3. calcium carbonate
  4. magnesium carbonate
Covalent compounds
  1. have high melting and boiling point
  2. are mostly soluble in water
  3. are formed between atoms of metals and non-metals
  4. are formed by the sharing of electrons in the bonding atoms.
The by product of soap is
  1. isoprene
  2. glycerol
  3. butene
  4. ethylene glycol
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