📚NCERT Questions — CBSE12
275 solved questions with detailed explanations
What is the hybridization of the carbonyl carbon atom in aldehydes and ketones?
What is the role of chromosomes in heredity?
Why does direct nitration of aniline yield a significant amount of m-nitroaniline, despite the -NH2 group being ortho and para directing?
Which of the following reactions is used to introduce Cl- or Br- into the benzene ring by treating a diazonium salt solution with corresponding halogen acid in the presence of copper powder?
The reaction R-X + NaI → R-I + NaX in dry acetone is known as:
Phenol is manufactured from cumene. What is the intermediate product formed when cumene is oxidized in the presence of air?
In the D-configuration of glyceraldehyde, where does the -OH group on the lowest asymmetric carbon atom lie when its structural formula is written following specific conventions?
Iodoform (CHI₃) was previously used as an antiseptic. Its antiseptic properties are due to:
When the vapours of a primary alcohol are passed over heated copper at 573 K, what is the main product formed?
Which of the following carboxylic acids is the strongest acid?