List of top Questions asked in KCET

Copper is extracted from Copper pyrites by heating in a Bessemer converter. The method is based on the principle that
The salt which responds to dilute and concentrated $H_2SO_4$ is
The polarizing angle of glass is $57^\circ$. A ray of light which is incident at this angle will have an angle of refraction as
To observe diffraction, the size of the obstacle
Using MOT, compare $O_2^+$ and $O_2^-$ species and choose the incorrect option.
In a first order reaction, the concentration of the reactant is reduced to $12.5\%$ in one hour. When was it half completed ?
One of the following amide will not undergo Hoffmann bromamide reaction :
The ratio of angular speed of a second-hand to the hour-hand of a watch is
In an $L-C-R$ circuit, at resonance
Four identical cells of emf $E$ and internal resistance $r$ are to be connected in series. Suppose if one of the cell is connected wrongly, the equivalent emf and effective internal resistance of the combination is
The pair of compound which cannot exist together in solution is

If $A=\begin{bmatrix} {\alpha}&{2} \\ {2}&{\alpha} \\ \end{bmatrix}$ $| A^3|= 27$then \(\alpha\) is equal to

A spherical shell of radius $10\, cm$ is carrying a charge $q$. If the electric potential at distances $5 \, cm, 10 \, cm$ and $15 \, cm$ from the centre of the spherical shell is $V_1, V_2$ and $V_3$ respectively, then respectively, then
In the given set of reactions, 2-Bromopropane ${ ->[{\text{AgCN}}][{\text{alc./heat}}] X ->[LiAlH_4] Y}$ the $IUPAC$ name of product $'Y'$ is

A nucleus at rest splits into two nuclear parts having radii in the ratio 1:2. Their velocities are in the ratio

The solution of differential equation $x \frac {dy}{dx}+2y=x^2$ is
Orlon has monomeric unit
On heating potassium permanganate, one of the following compound is not obtained :
$ { MSO_4 ->[NH_4OH] $\underset{\text{white}}{ {X}}$\downarrow ->[NH_4OH][exess] Y ->[H_2S] Z \downarrow}$ Here $M$ and $Z$ are
Two concentric coils each of radius equal to $2\, \pi$ cm are placed right angles to each other.If $3\,A$ and $4\,A$ are the currents flowing through the two coils respectively. The magnetic induction $(in\, Wb\, m^{-2})$ at the centre of the coils will be
Number of possible alkynes with formula $C_5H_8$ is
Cryolite is
Arrange the following compounds in the increasing order of their acidic strength i. $m$-nitrophenol ii. $m$-cresol iii. phenol iv. $m$-chlorophenol
Sonalika and Kalyan Sona are high yielding varieties of
A galvanometer of resistance $50\, \Omega$ gives a full scale deflection for a current $5\times10^{-4}$. The resistance that The resistance that should be connected in series with the galvanometer to read $3 \,V$ is