List of top Questions asked in KEAM- 2025

In the following reaction, the final product B is:
C\(_6\)H\(_5\)NH\(_2\) + (CH\(_3\)CO)\(_2\)O (Pyridine) \(\rightarrow\) A \(\xrightarrow{Br, CH_3COOH}\) B

Which of the following does not undergo Cannizzaro reaction?

Match the vitamins in Column I with their sources in Column II.

The order of reactivity towards \( \text{S}_\text{N}2 \) reaction among the following is
\[ (a)\ \text{CH}_3\text{CH}_2\text{Cl} \quad (b)\ \text{CH}_3\text{CH(Cl)}\text{CH}_3 \quad (c)\ \text{(CH}_3\text{)}_3\text{CCI} \quad (d)\ \text{CH}_3\text{CH}_2\text{Cl} \]

Identify the correct sequence of reactions and products for the following scheme.

Which one of the following compounds undergoes HVZ reaction?

Which of the following hydrocarbon pair have the highest boiling point and highest melting point respectively?

The correct decreasing order of acidic strength is

Which of the following statement is INCORRECT with Kolbe's electrolytic process?

\(CrO_3\) is a/an

The IUPAC name of $[\mathrm{Fe(CO)_5}]$ is:

The correct order of ionic radii of Ce, La, Pm and Yb in \( +3 \) oxidation state is

The isomerism exhibited by the octahedral complex $[\mathrm{Co(NH_3)_4Br_2}]Cl$ is:

Which of the following is not an electron withdrawing group?

Which of the following statement is INCORRECT?

Which of the following outermost electronic configuration of the element shows the highest oxidation state?

Which of the following statement is true for the electrochemical, Daniel cell?

Which of the following is a zero order reaction?

The first order rate constant for the decomposition of \( \text{N}_2\text{O}_5 \) is \( 6.93 \times 10^{-4}\, \text{sec}^{-1} \). Its half-life period is

Which of the following statement is INCORRECT for the concept of oxidation?

The osmotic pressure of \( 0.01\,M \) aqueous solution of urea at \( 300\,K \) is \((R = 0.082\,\text{lit atm mol}^{-1}\text{K}^{-1})\)

Types of system and their definitions are given below. Choose the correct match from the following codes:
System:
(a) Closed system
(b) Open system
(c) Isolated system
(d) Homogeneous system
(e) Heterogeneous system
Definition:
(i) A system which can exchange both energy and matter with surrounding
(ii) A system which cannot exchange matter or energy with surrounding
(iii) A system consisting of single phase
(iv) A system consisting of many phases
(v) A system which can exchange only energy with surrounding

Given: $\Delta_r H^{+}(\text{Ag}^+)=105.6\ \text{kJ mol}^{-1}$, $\Delta_r H^{+}(\text{Cl}^-)=-167.2\ \text{kJ mol}^{-1}$, and $\Delta_r H^{+}(\text{AgCl})=-127.1\ \text{kJ mol}^{-1}$, find the value of $\Delta_r H$.

Which of the following statement is INCORRECT with p-block elements?