List of top Questions asked in KCET, WBJEE

Among the following 0.1 m aqueous solutions, which one will exhibit the lowest boiling point elevation, assuming complete ionization of the compounds in solution?
Which of the following reaction/s does not yield an amine?

Match the following with their pKa values 

Half-life of a first order reaction is 20 seconds and initial concentration of reactant is 0.2M. The concentration of reactant left after 80 seconds is
The correct statement/s about Galvanic cell is/are:
(a) Current flows from cathode to anode
(b) Anode is positive terminal
(c) If \(E_{\text{cell}} < 0\), then it is spontaneous reaction
(d) Cathode is positive terminal
Which examples of carbohydrates exhibit \(\alpha\)-link (\(\alpha\)-glycosidic link) in their structure?
180 g of glucose, \(C_6H_{12}O_6\), is dissolved in 1 kg of water in a vessel. The temperature at which water boils at 1.013 bar is ______ (given, \(K_b\) for water is 0.52 K kg mol\(^{-1}\)). Boiling point for pure water is 373.15 K
The electronic conductance depends on:
A ligand which has two different donor atoms and either of the two ligates with the central metal atom/ion in the complex is called
In the following pairs, the one in which both transition metal ions are colourless is

Match List-I with List-II and choose the correct answer from the options given below. 

According to the Heisenberg's Uncertainty principle, the value of \(\Delta v \cdot \Delta x\) for an object whose mass is \(10^{-6}\) kg is
Which of the following statements is/are true about equilibrium?
Statement-I: Reduction of ester by DIBAL-H followed by hydrolysis gives aldehyde.
Statement-II: Oxidation of benzyl alcohol with aqueous KMnO₄ leads to the formation of benzaldehyde.
Among the above statements, identify the correct statement.
Catalysts are used to increase the rate of a chemical reaction. Because it

In the complex ion  Fe(C2O4)3  the Co-ordination number of Fe is

Which of the following reagents are suitable to differentiate Aniline and N-methylaniline chemically?
Which of the following methods of expressing concentration are unitless?
Select the INCORRECT statement/s from the following:

In the given graph, \( E_a \) for the reverse reaction will be 

If \(N_2\) gas is bubbled through water at 293 K, how many moles of \(N_2\) gas would dissolve in 1 litre of water? Assume that \(N_2\) exerts a partial pressure of 0.987 bar. [Given \(K_H\) for \(N_2\) at 293 K is 76.48 K bar]
Which of the following has the most acidic Hydrogen?
Which of the following statements are true about \( [NiCl_4]^{2-} \)?
(a) The complex has tetrahedral geometry.
(b) Co-ordination number of Ni is 2 and oxidation state is +4.
(c) The complex is sp\(^3\) hybridised.
(d) It is a high spin complex.
(e) The complex is paramagnetic.

Variation of solubility with temperature \(T\) for a gas in liquid is shown by the following graphs. The correct representation is