Hydrocarbons

Question 1

Size of C—C bond and C—H bond

Answer 1

154pm and 112pm

Question 2

_________ act as catalysts at room temperature whereas ______ is required at higher temperature and pressure
(Hydrogenation)

Answer 2

Palladium and platinum

Nickel

Question 3

In Kolbe’s electrolysis, methyl free radical is produced at which electrode

Answer 3

Anode!

Question 4

Catalysts used for methanol, methanal and Ethanoic acid?

Answer 4

Cu
Mo2O3
(CH3COO)2Mn

Question 5

Tertiary alkanes on vigorous oxidation

Answer 5

Give alcohols

Question 6

Catalyst for isomerization

Answer 6

AlCl3/HCl

Question 7

Pyrolysis is a __________ reaction

Answer 7

Free radical

Question 8

Torsional strain for ethane?

Answer 8

12.5kJ/mol

Question 9

What is partially deactivated palladized charcoal? What is it deactivated with?

Answer 9

Lindlar’s Catalyst

Sulphur compounds or quinoline

Question 10

Which halogen addition reaction is not seen in normal conditions (alkene)

Answer 10

Iodine

Question 11

dil KMnO4 oxidates alkenes to?

acidic KMnO4 or K2Cr2O7 oxidizes it into?

Answer 11

Glycols

Carbonyl or carboxyl

Question 12

Alkynes addition:
I. Halogens
II. Hydrogen halides

Answer 12

I. Vic dihalide

II. Gem dihalide

Question 13

Which year Wohler synthesized urea

Answer 13

1828

Question 14

acetic acid synthesized by

Answer 14

Kolbe

Question 15

methane synthesized by

Answer 15

Berthelot

Question 16

remember tetrahydrofuran

Answer 16

pentagon with O at apex

remember thiophene too