Preparation of Alkanes with Grignard Reagent

Q.

Can alkynes decolourise bromine water?

Q. Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

1. $C{H}_{3}C{H}_{2}OH$
2. $C{H}_{3}CHO$
3. $C{H}_{3}COC{H}_3$
4. $C{H}_{3}C{O}_{2}C{H}_2$

Q. Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

1. $C{H}_{3}C{H}_{2}OH$
2. $C{H}_{3}CHO$
3. $C{H}_{3}COC{H}_3$
4. $C{H}_{3}C{O}_{2}C{H}_2$