List of top Questions asked in KEAM

In a nuclear decay, after the emission of one $\alpha$-particle and one $\beta$-particle
The number of windings in the primary and secondary of a transformer are 100 and 2000 respectively. If 50 V a.c is applied to the primary, the potential difference across the secondary is
In which of the following aqueous solutions of salt, is pH independent of the concentration of the salt?
For the gas phase homogeneous equilibrium:

\[ 2X(g) \rightleftharpoons 2Y(g) + Z(g) \]

$K_C$ at 400K is $1 \times 10^{-3}$ mol L-1. What is the value of $K_P$ for the equilibrium at 400K?

\[ R = 0.082 \, \text{L atm K}^{-1} \, \text{mol}^{-1} \]

The element with atomic number 111 was first named as Unununnium. What is its IUPAC name?
Conformational isomerism is not possible in
The decreasing order of reactivity of butyl bromides in \(S_N2\) reaction is
Which of the following is the most acidic compound?
When propanoic acid is treated with bromine and red phosphorus in aqueous medium, 2-bromopropanoic acid is formed. This reaction is known as
Which of the following groups is deactivating ortho-para directing in aromatic electrophilic substitution?
Gatterman reaction is used to convert benzene diazonium chloride to
The correct increasing order of basic strength is
Animal starch is
When n-hexane is heated to 773K at 10-20 atmosphere pressure in the presence of \(Cr_2O_3\), benzene is formed. This reaction is called
Which one of the following is an outer orbital complex?
When sodium nitroprusside is added to sodium fusion extract the presence of sulphur is indicated by the formation of a violet colored complex. Its formula is

Iron does not exhibit ___________ oxidation state.

Half-life of radon is 3.5 days. The amount of radon left out of 12 mg mass undecayed after 35 days is nearly
An alternating current having peak value 14.14 A is used to heat a metal wire. The value of the direct current \(i\) required to produce the same heating effect in the same wire is
Octet rule is obeyed in
Which of the following molecules has two sigma ($\sigma$) and two pi ($\pi$) bonds?
The photoelectric work function for a photosensitive material is 5.2 eV. The energy of the incident radiation for which the stopping potential is 6 V is

If the speed of a moving particle is decreased by 1%, the de Broglie wavelength of the wave associated with it

A block of mass $M$ moves with a velocity $v$ along a frictionless horizontal surface towards another block of mass $2M$ at rest. The velocity of the center of mass of the system of blocks is

The values of X, Y, and Z in the following chemical equation are respectively: 
\( S_8 + X HNO_3 ({conc.}) \rightarrow Y H_2SO_4 + X NO_2 + Z H_2O \)