List of top Chemistry Questions

Identify the product 'B' in the following reaction
\(\text{CH}_3-\text{I}\overset{\text{KCN}\,}{\rightarrow }\text{A}\overset{\text{Na/C}_2\text{H}_5\text{OH}\,}{\rightarrow }\text{B}\)

Which of the following is confirmed by the reaction of glucose with hydroxylamine?

What happens when phenol reacts with bromine water?

Aldehydes are more reactive than ketone towards nucleophilic attack because of?

Which of the following is a dihydric alcohol?

Which of the following statements is true regarding Cannizzaro reaction?

What is the general molecular formula of alkyl halides?

What is the value of spin only magnetic moment for \(\text{Cu}^{2+}\) in BM?

Which of the following halogen derivative forms a poisonous phosgene, when come in contact with air and light?

Match List I with List II

List I	List II
(A). Brownian Motion	(I). Removal of impurities from the colloidal sols using a semipermeable membrane.
(B). Tyndall Effect	(II). Movement of colloidal particles under the influence of an electric field.
(C). Electrophoresis	(III). Random movement of colloidal particles due to kinetic energy.
(D). Dialysis	(IV). Scattering of light by colloidal particles

Choose the correct answer from the options given below:

Which of the following factors may be regarded as the main cause of lanthanide contraction?

The sum of coordination number and oxidation number of M in \([\text{M(en)}_2\text{C}_2\text{O}_4]\text{Cl}\) is

Identify the factor responsible for the greater range of oxidation states in actinoids.

In the coordination complex, Potassium hexacyanoferrate(II), the central atom/ion acts as,

The rate of the reaction \(2A+3B\rightarrow 2C+D\) is \(6\times 10^{-4}\text{ mol dm}^{-3}\text{ s}^{-1}\), when \([A] = [B] = 0.3\text{ mol dm}^{-3}\). If the reaction is of first order for A and zeroth order for B, then find the rate constant.

Which from following statements regarding mercury battery is NOT true?

The molar conductivity of \(0.04\) M \(\text{AB}_2\) type salt solution at \(300\) K is \(200\,\Omega ^{-1}\text{cm}^2\text{mol}^{-1}\). Find the conductivity.

What is the value of the slope of a graph obtained by plotting the concentration of reactant \((A)_t\) versus time for zero order reaction?

The time required for \(90\%\) completion of a certain first order reaction is \(1\) hour. Calculate the time required for \(99.9\%\) completion of the same reaction.

Which of the following nano structures includes nanotubes as an example?

Which of the following solutes has the ratio of theoretical molar mass to the experimentally observed molar mass is \(3\)?

\(5\) g urea is dissolved in \(100\) g water. Find the amount of glucose to be dissolved in \(120\) g of water so that the boiling points of both solutions will be the same.
[Molar mass of urea \(= 60\) g \(\text{mol}^{-1}\) & Molar mass of glucose \(= 180\) g \(\text{mol}^{-1}\)]

Calculate the van't Hoff factor of a centimolar solution of potassium ferrocyanide if it is \(60\%\) dissociated at \(300\) K.

Which of the following is NOT a characteristic of Schottky defect?

The molar conductivity of \(0.01\) M monobasic acid at \(25\,^{\circ}\text{C}\) is \(15\) ohm\(^{-1}\) cm\(^2\) mol\(^{-1}\). The molar conductivity of the same acid at infinite dilution is \(375\) ohm\(^{-1}\) cm\(^2\) mol\(^{-1}\). Calculate \([\text{H}^+]\) in solution.