List of top Questions asked in KCET, WBJEE

A rectangular coil of $100$ turns and size $0.1 \,m \times 0.05\, m$ is placed perpendicular to a magnetic field of $0.1 \,T$. If the field drops to $0.05 \,T$ in $0.05$ second, the magnitude of the e.m.f. induced in the coil is
In a lift moving up with an acceleration of $5\,ms^{-2}$ a ball is dropped from a height of $1.25\,m$ .The time taken by ball to reach the floor of the lift is........(nearly)$(g=10\, ms^{-2})$
$log (\sin \,1^\circ ) \times \log(\sin\, 2^\circ) \times \log(\sin \,3^\circ)\dots log (sin \,179^{\circ})$
If $\frac {(x+1)^2}{x^3+x}=\frac {A}{x}+\frac {Bx+C}{x^2+1}$, then $\sin^{-1} \,A + \tan ^{-1} \,B + sec ^{-1} \,C$ is equal to
The diagram given below denotes the various parts of a typical flower. Identify the labelled parts A, B, C and D and choose the correct option :
An example for a neutral buffer is
Which of the following cations will have minimum flocculation value for arsenic sulphide sol ?
The stability of a Lyophobic colloid is due to
Mesomeric effect involves
If the value of $C_0 + 2 \cdot C_1 + 3 \cdot C_2 + \dots+ (n+1) \cdot C_n=576$ ,then n is equal to
Hybridised states of carbon in Graphite and Diamond are respectively
In the circuit $R_1 = R_2$.The value of $E$ and $R_1$ are ________($E-EMF,R_1$-resistance)
Acetone and Propanal are
A group of atoms can function as a ligand only when
An alkyl bromide $(X)$ reacts with Sodium in ether to form $4, 5$ -diethyl octane, the compound X is
Which of the following is not a colligative property ?
The number of water molecules present in a drop of water weighing $0.018\, gm$ is
Which of the following aqueous solutions will exhibit highest boiling point ?
Which one of the following is not correct ?
When limestone is heated, $CO_2$ is given off. The metallurgical operation is
In $R-L-C$ series circuit, the potential differences across each element is $20\,V$. Now the value of the resistance alone is doubled, then $P.D.$ across $R, L$ and $C$ respectively
Pick out the correct statements from the following: (I) Electron emission during $\beta$-decay is always accompained by neutrino (II) Nuclear force is charge independent. (III) Fusion is the chief source of stellar energy
Alkali metals have negative reduction potential and hence they behave as
See the diagram. Area of each plate is $2.0\,m^2$ and $d = 2\times 10^{-3} C$ is given to $Q$.Then the potential of $Q$ becomes
Read the statements (A) and (B). Choose the right one : Statement (A) : Atherosclerosis is a disease characterised by the thickening of arterial walls. Statement (B) : Deposition of cholesterol and triglycerides in the arterial walls causes atherosclerosis.