Science (English Medium) इयत्ता १२ - CBSE Important Questions

Arrange the following in increasing order of their basic strength :

How do you convert the following: C₆H₅CONH₂ to C₆H₅NH₂

How do you convert the following: Ethanenitrile to ethanamine

Write the chemical equations involved when aniline is treated with the following reagents:

Br₂ water

Write the chemical equations involved when aniline is treated with the following reagents:

CHCI₃ + KOH

Write the chemical equations involved when aniline is treated with the following reagents: HCI

Give the structures of A, B and C in the following reactions :

Give the structures of A, B and C in the following reactions :

How will you convert the following?

Aniline into N−phenylethanamide

Account for the following:

Arrange the following compounds in the increasing order of their basic strength in aqueous solution: CH₃NH₂,(CH₃)₃N,(CH₃)₂NH

A compound 'A' on reduction with iron scrap and hydrochloric acid gives compound 'B' with molecular formula C₆H₇N. Compound 'B' on reaction with CHCl₃ and alcoholic KOH produces an obnoxious smell of carbylamine due to the formation of 'C'. Identify 'A', 'B' and 'C' and write the chemical reactions involved.

Do the following conversions in not more than two steps:

\[\begin{array}{cc}
\ce{CH3CN to CH3 - C - CH3}\\
\phantom{...........}||\\
\phantom{...........}\ce{O}
\end{array}\]

Do the following conversions in not more than two steps:

What are monosaccharides?

Define the following term as related to proteins:

Primary structure

What are the expected products of hydrolysis of lactose?

Differentiable between the following: 
Amylose and Amylopectin 

Answer the following question.
What is the basic structural difference between glucose and fructose?

Write the reaction involved when D-glucose is treated with the following reagent:

Br₂ water

Write the reaction involved when D-glucose is treated with the following reagent:

(CH₃CO)₂O