Which of the following class of organic compound does not contain (C = O) group in some form ?

(1) Aldehydes
(2) Ethers
(3) Carboxylic acids
(4) Esters

The gaseous hydrocarbon acetylene, C₂H₂ used in welder's torches, releases 1300 kJ. When 1 mole of C₂H₂ undergoes combustion, then which of the following is not TRUE ?

(1) Combustion of acetylene is an exothermic reaction
(2) The balanced chemical reaction of combustion of acetylene is : C₂H₂ + 5O₂ - > 2CO₂ + H₂O
(3) 2 moles of water produced when 2 moles of acet ylene react s.
(4) 44 g of CO₂ produced when 13 g of acetylene reacts.

Which Vitamin is found in abundance in Amla?

(1) Vitamin -A
(2) Vitamin - C
(3) Vitamin - B
(4) Vit amin - D

Property of self-combination of the atoms of the same element to form long chains is known as

(1) Protonation
(2) Carbonation
(3) Coronation
(4) Catenation

The functional group in aldehyde is

(1)   (2)  (3)   (4)