106) For hydrocarbons, if the molecular formula increases, then melting point

A) increases
B) decreases
C) either increases or decreases
D) no relation

107) In hydrocarbons, which type of bonds does carbon form

A) four single bonds
B) two double bonds
C) one single bond and one triple bond
D) all of these

108) The hydrocarbons containing -CONH₂ functional group are called

A) carboxylic acids
B) amides
C) amines
D) esters

109) What happens when litmus paper test is performed with an acid

A) red litmus turns to blue
B) red litmus turns to yellow
C) blue litmus turns to red
D) blue litmus turns to yellow

110) Which of the following properties is used in the olfactory indicator

A) colour change
B) odour
C) taste
D) none of these