List of top Chemistry Questions

Which of following observations is found in Tollens test for aldehydes?
Which of the following statements is NOT correct?
Which of the following reactions uses diazonium salt ?
An organic compound \(\text{CH}_3\text{-CH=CH-CH}_2\text{-CHO}\) is taken in two different containers A and B. Sample in A is treated with \(\text{H}_2\) / Ni forming new compound P. Sample in B is treated with \(\text{LiAlH}_4\) and hydrolyzed further forming new compound Q. Identify P and Q.
Which of the following alkyl halides undergoes \(\text{SN}^1\) reaction most readily?
Identify the factor responsible for colour of transition metal compounds.
Identify oxidation state of cobalt ion in the complex, \([\text{Co(NH}_3)_5\text{Br}]\text{SO}_4\) .
Which of the following properties is responsible for the development of colour to the colloids?
Identify the number of unpaired electrons present and geometry respectively of \([\text{Co(NH}_3)_6]^{3+}\) complex.
Which of the following alkyl halides is hydrolyzed most rapidly by the \(\text{SN}^2\) mechanism ?
The cells A and B contain aqueous solutions of ferrous chloride and ferric chloride respectively. The mass of iron deposited by the same quantity of electricity in cells A and B is in the ratio.
What happens during the discharge of a lead storage battery?
Nano materials not applied in
The rate constant of reaction is \(1.5\times 10^7 \text{s}^{-1}\) at 300 K and \(3.0\times 10^7 \text{s}^{-1}\) at 330 K. What is the activation energy for the reaction? [ \(R\times 2.303 = 19.15 \text{JK}^{-1}\text{mol}^{-1}\)]
The rate constant for the reaction \(2\text{N}_2\text{O}_5\rightarrow 4\text{NO}_2+\text{O}_2\) is \(3.0\times 10^{-5} \text{s}^{-1}\). If the rate is \(2.4\times 10^{-5} \text{mole L}^{-1} \text{s}^{-1}\) then the concentration of \(\text{N}_2\text{O}_5\,(\text{mol L}^{-1})\) is
What is order of radioactive decay of a substance ?
Calculate the number of atoms present in 90 g of metal if it forms bcc structure.
[ \(ρ\times a^3 = 1.8\times 10^{-22}\) g ]
Calculate the boiling point of an aqueous solution containing 18 g glucose in 100 g water if the molal elevation constant of water is \(0.5 \text{K kg mol}^{-1}\).
[Molar mass of glucose \(= 180 \text{g mol}^{-1}\) and boiling point of water \(= 100 ^{\circ}\text{C}\)]
For a binary solution, when a nonvolatile nonelectrolyte solute is dissolved in solvent, the vapour pressure of solvent decreases by 20 % . what is mole fraction of solvent in solution ?
In the fcc structure, the number of tetrahedral holes per sphere is
Which of the following is the colligative property of a solution?
Identify the reaction from following so that the standard potential of \(\text{Cu}^{+2}/\text{Cu}\) electrode is 0.34 V. with respective to SHE ?
What type of following reactions, the oxidative rancidity is?
A compound forms hcp structure. What is the number of tetrahedral voids formed in 0.8 mol of it.
Which of the following alkanes is NOT obtained when a mixture of ethyl iodide and n-propyl iodide is subjected to Wurtz reaction?