List of top Chemistry Questions asked in KEAM

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

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

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

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

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

Which of the following is a zero order reaction?

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 $\Delta_r H$.

The pH of a solution is \( 4 \) then its \( \text{OH}^- \) ion concentration (in mol dm\(^{-3}\)) is

The question text is cut off in the image, so the full data for this question is not visible. Only the ending part
“\(\dots\) mole of \(CH_3COONa\). The \([H^+]\) in the resultant solution is”
and the given value
\[ K_a(CH_3COOH)=1.1\times 10^{-5} \] are visible. Therefore, the complete numerical information needed to solve this question is missing.

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

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

Which of the following molecule has zero dipole moment?

Which of the following statement is NOT true with Bohr's model of atom?

When the uncertainty in momentum is zero then the uncertainty in the position of a particle is

Which of the following has the highest molar mass? \((\text{Atomic masses: N}=14,\ \text{O}=16,\ \text{Ag}=108,\ \text{Pb}=208,\ \text{Na}=23,\ \text{H}=1,\ \text{K}=39)\)

Above the threshold frequency, if the intensity of incident light falling on a photo sensitive material is increased, then the correct statement is:

Global warming leads to

The IUPAC name of allylamine is

In which of the following liquid inter molecular hydrogen bonding does not exist?

Phenol is treated with $H_{2}SO_{4}$ to give a product 'X' which on treatment with conc. $HNO_{3}$ gives compound 'Y'. The compounds 'X' and 'Y' are respectively:

Denatured alcohol with colour and foul smell is made now a days by mixing ethanol with

Benzoyl chloride is converted to benzaldehyde by

One mole of an alkene reacts with acidic $KMnO_{4}$ to give two moles of ethanoic acid. What is the alkene?

Which of the following is a vicinal dihalide?

$S_{N}1$ reaction is most favoured by: