List of top Questions asked in KCET, WBJEE

Which one of the following conversions involve change in both hybridization and shape?
The sugar present in milk is__________
For the reversible reaction $A_{(s)}+B_{(g)} \rightleftharpoons C_{(g)}+D_{(g)}: \Delta G^{0}=-350 kJ .$ Which one of the following statements is true?
If $x\neq n \pi ,\, x \neq\,(2n+1)\frac {\pi}{2}.n\in Z, $ then $\frac {Sin^{-1}(Cos x) + Cos^{-1}(Sin x)}{Tan ^{-1}(Cot x)+ Cot^{-1}(Tan x)} $ =
In $\Delta ABC$, if $a =2, B = \tan ^{-1} \frac {1}{2}$ and $C = \tan ^{-1}\frac{1}{3}$, then $(A,b)$ =
The forbidden energy gap in $Ge$ is $0.72\, eV$. Given, $hc = 12400 \, eV \, - ?$ . The maximum wavelength of radiation that will generate an electron hole pair is
Reaction of methyl bromide with aqueous sodium hydroxide involves
The correct IUPAC name of $K_2[Ni(CN)_4]$ is _______
The empirical formula of a non-electrolyte is $CH_2O$. A solution containing $6 \,g$ of the compound exerts the same osmotic pressure as that of $0.05\, M$ glucose solution at the same temperature. The molecular formula of the compound is
The amount of heat evolved when $500 \,cm^3$ of $0.1 \,M \,HCl$ is mixed with $200\, cm^3$ of $0.2\,M \,NaOH$ is _______
Which one of the following pairs is an example for lateral meristem?
The diagram of Labeo rohita is given below. Identify the parts labelled A, B, C, D, E, F, G.
Two smalI spheres of masses $M_1 $ and $M_2$ are suspended by weightless insulating threads of lengths $ L_1$ and $ L_2$. The spheres carry charges $Q_1$ and $Q_2$ respectively. The spheres are suspended such that they are in level with one another and the threads are inclined to the vertical at angles of $\theta_1 $ and $\theta_2$ as shown. Which one of the following conditions is essential, if $\theta_1 = \theta_2$ ?
The temperature of a gas contained in a closed vessel of constant volume increases by $1^\circ$C when the pressure of the gas is increased by $1\%$. The initial temperature of the gas is ..........
The spin only magnetic moment of $Mn^{+4}$ ion is nearly____
There is a uniform electric field of intensity $E$ which is as shown. How many labelled points have the same electric potential as the fully shaded point?
The condition for the line $y = mx +c$ to be a normal to the parabola $y = 4ax$ is _______
The set of quantum numbers for the outermost electron for copper in its ground state is ___________
The set of real values of x for which $ f(x) = \frac {x}{log\, x}$ increasing, is
$P_4O_{10}$ is the anhydride of
If $y'' - 3y' + 2y = 0$ where $y(0) = 1$, $y'(0) = 0$, then the value of $y$ at $x \,= log_e \,2$ is
Keto-enol tautomerism is not observed in
The decimal equivalent of the binary number $(11010.101)_2$ is
Half-life of a radioactive substance is $20$ minute. The time between $20\%$ and $80\%$ decay will be :
A ball is projected horizontally with a velocity of $5 \,m/s$ from the top of a building $19.6\, m$ high. How long will the ball take of hit the ground ?