List of top Questions asked in CBSE CLASS XII- 2026

Under which major head and sub-heads (if any) will the following items be presented in the Balance Sheet of a company as per Schedule III, Part I of the Companies Act, 2013? (i) Demand deposits with banks
(ii) Long-term loans
(iii) Livestock
Rate constant $k$ for the first order reaction is $2.54 \times 10^{-3} \text{ s}^{-1}$. Calculate the time required for three-fourth of the reactant to decompose. ($\log 4 = 0.60$)
Asha and Indra were partners in a firm sharing profits and losses in the ratio of 3 : 2. Their Balance Sheet on 31st March, 2025 was as following : Balance Sheet of Asha and Indra as at 31st March, 2025
On 1st April, 2025, Suraj was admitted for 1/4th share in the profits of the firm on the following terms : (i) Suraj will bring capital proportionate to his share in the profits of the firm. (ii) Goodwill of the firm was valued at ₹ 1,00,000 and Suraj will bring his share of goodwill premium in cash. (iii) Furniture was taken over by Asha at ₹ 1,00,000. (iv) A liability of ₹ 5,000 included in creditors was not likely to arise. (v) Plant and Machinery was revalued at ₹ 4,35,000. Prepare Revaluation Account and Partners' capital accounts on Suraj's admission. Show the calculation of proportionate capital clearly.
The concentration of the reactant is reduced from $0.6 \text{ mol L}^{-1}$ to $0.2 \text{ mol L}^{-1}$ in 5 minutes in a first order reaction. Calculate rate constant of the reaction. ($\log 3 = 0.48$)
Why transition elements form interstitial compounds?
Why second ionization enthalpies of chromium and copper are exceptionally higher than those of their neighbouring elements?
Write the unit of (i) second order reaction and (ii) zero order reaction.
Define Effective collision.
Indicate the type of isomerism exhibited by the following complex: $[Co(en)_3]Cl_3$
Define coordination number.
Assertion (A): Aromatic primary amines can be prepared by Gabriel phthalimide synthesis. Reason (R): Aryl halides do not undergo nucleophilic substitution with phthalimide ion. Choose the correct option:
Assertion (A): Glucose gets oxidized to six carbon gluconic acid on reaction with bromine water. Reason (R): The carbonyl group is absent in the open chain structure of glucose. Choose the correct option:
Assertion (A): The molecularity of the given reaction is 2. \[ 2\text{HI} \rightarrow \text{H}_2 + \text{I}_2 \] Reason (R): Two molecules of the reactants are involved in simultaneous collision between them. Choose the correct option:
Assertion (A): Zinc, cadmium and mercury are not considered as transition elements. Reason (R): These elements have completely filled $d$ orbitals in their ground state as well as in their common oxidation states. Choose the correct option:
Proteins are polymers of $\alpha$-amino acids which are joined to each other by:
Which of the following reactions is not explained by the open chain structure of glucose?
Identify the compound produced by the reduction of ethanenitrile with lithium aluminium hydride:
The base which is present in DNA but not in RNA is:
Which of the following molecule is chiral in nature?
Identify the correct increasing order of boiling points of the given compounds:
The correct IUPAC name of the complex [Pt(NH$_3$)$_2$Cl$_2$] is:
Which of the following is heteroleptic complex?
The order for the given reaction is: \[ \text{A} + 2\text{B} \rightarrow \text{Products} \] \[ \text{Rate} = k[\text{A}]^{1/2}[\text{B}]^{1} \]
Electronic configuration of chromium is:
Identify the correct statement: