List of top Chemistry Questions

A 0.1 molal aqueous solution of a weak acid is 30% ionised. If Kf for water is \( 1.86^\circ C/\text{mol} \), the freezing point of the solution will be
Which of the following structures is the most preferred and hence of lowest energy for \( \text{SO}_3 \)?
What is the value of electron gain enthalpy of \( \text{Na} \), if \( \text{IE}_\text{Na} = 5.1 \, \text{eV} \)?
Which of the following compound is the most basic?
The unit of rate constant for a zero order reaction is
The order of reactivity of phenyl magnesium bromide (\( \text{PhMgBr} \)) with the following compounds is:
Match the compounds given in List-I with List-II and select the suitable option using the codes given below:
A solid compound XY has NaCl structure. If the radius of the cation is 100 pm, the radius of the anion \( Y^{1-} \) will be
Which of the following compounds undergoes nucleophilic substitution reaction most easily?
Consider the following processes \[ \Delta H (\text{kJ/mol}) = \frac{1}{2} B + 150 \] For \( B + D \rightarrow E + 2C \), \( \Delta H \) will be
Which of the following carbonyls will have the strongest C—O bond?
In the following reaction,
Which has the maximum number of molecules among the following?
Which of the following is not a fat-soluble vitamin?
Which of the following is not a fat-soluble vitamin?
Which of the statements about 'Denaturation' given below are correct? (a) Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
(b) Denaturation leads to the conversion of double strand of DNA into single strand.
(c) Denaturation affects the primary structure which gets destroyed.
Fructose reduces Tollen's reagent due to
Which of the above compounds on being warmed with iodine solution and NaOH will give iodoform?
Some statements about heavy water are given below. Which of the following statements are true?
When glycerol is treated with excess of HI, it produces
Which of the following compounds will be most readily dehydrated?
Some of the properties of the two species, \( \text{NO}_3^- \) and \( \text{H}_2O \), are described below. Which one of them is correct?
Which of the following conformers for ethylene glycol is most stable?
The IUPAC name of the compound \( \text{CH}_3\text{CH}= \text{CHC}\text{H}_2\) is
Match List-I with List-II for the equations and select the correct option.