102) Compounds with the same molecular formula but different structures are called

A) isotopes
B) homologous compounds
C) functional groups
D) isomers

103) Which series contains compounds differing by a -CH₂ – unit?

A) Homologous series
B) Isomeric series
C) Saturated series
D) Ionic series

104) Which functional group is present in carboxylic acids?

A) -CHO
B) -COOH
C) -C=O
D) -OH

105) Which substance can oxidize ethanol to ethanoic acid?

A) Alkaline potassium permanganate
B) Sodium hydroxide
C) Dilute hydrochloric acid
D) Sodium ethoxide

106) What is the product formed when magnesium ribbon is burnt in oxygen?

A) Magnesium chloride
B) Magnesium oxide
C) Magnesium carbonate
D) Magnesium hydroxide