List of top Questions asked in CBSE CLASS XII

value of Net National Product at Factor Cos

“Trade and Investment Policy of India had undergone comprehensive changes in the post reforms period of 1991.” Do you agree with the given statement? Justify your answer with any two valid arguments.

“Historians have studied many rules and varied practices of familial ties during the Mahabharata period.” Explain the statement with examples.

Franz in “The Last Lesson” realizes the importance of going to school while Saheb in “Lost Spring” yearns to go to school. Write a paragraph exploring the different perspectives of these two young boys on learning and education.

Two identical small conducting balls $ B_1 $ and $ B_2 $ are given $-7$ $\mu C$ and $+4$ $\mu C$ charges respectively. They are brought in contact with a third identical ball $ B_3 $ and then separated. If the final charge on each ball is $-2$ $\mu C$, the initial charge on $ B_3 $ was:

You are Mr. Srikanth Sharma. You have recently built a new house in the hills of Uttarakhand. Draft a letter inviting your brother and his family to spend a few days with you in your new home. Include relevant details.

An amide ‘A’ with molecular formula C$_7$H$_7$ON undergoes Hoffmann Bromamide degradation reaction to give amine ‘B’. ‘B’ on treatment with nitrous acid at 273-278 K forms ‘C’ and on treatment with chloroform and ethanolic potassium hydroxide forms ‘D’. ‘C’ on treatment with ethanol gives ‘E’. Identify ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ and write the sequence of chemical equations.

(a) You are Anuj, a student of Class XII. Whenever you feel stressed, you listen to music and experience relaxation. You strongly believe that music has the power to destress and refresh the body and mind.

Based on your experience, write an article on "Music as Therapy" for a health magazine, highlighting the healing power of music. Use the following points along with your own insights to develop your article:

Key Points:

Music establishes a connection with the self.
Music helps in self-expression.
Comforts the body, mind, and soul.
Improves one’s mood and emotional well-being.

(a) “United Nations Department of Economic and Social Affairs indicated that India has overtaken China as the world’s most populous country in the month of April 2023.”
Explain the consequences of the one-child policy adopted by China in the 1970s.

If amines are arranged in increasing order of their basic strength in gaseous phase, the correct order will be:

The most stable complex among the following is:

Williamson's synthesis of preparing dimethyl ether is a/an:

Give plausible explanation for:
(a) Diazonium salts of aromatic amines are stable.
(b) Aniline does not undergo Friedel-Crafts reaction.
(c) Aniline on nitration gives substantial meta product.

The correct IUPAC name of (CH₃)₃C-CH₂Br is:

The IUPAC name of the complex [Co(NH₃)₅(ONO)]Cl₂ is:

Which of the following does not undergo Aldol condensation?

The geometry of paramagnetic nickel complex [NiCl₄]²⁻ is:

Out of Fe²⁺, Co²⁺, Cr³⁺, Ni²⁺, the one which shows the lowest magnetic moment is:
[Atomic number: Fe = 26, Co = 27, Ni = 28, Cr = 24]

For a chemical reaction A → B, the rate doubles when the concentration of A is increased four times. The order of reaction is

The chemical test which can be used to distinguish between ethanamine and aniline is:

Considering the strength of the ligand, the highest excitation energy will be observed in:

Draw a T.S. of a mature anther of an angiosperm. Label its any three wall layers and mention their functions.