List of top Chemistry Questions

Which of the following statements is not correct ?
At constant temperature, a gas occupies a volume of 200 mL at a pressure of 500 mm Hg. What will be its volume at 800 mm Hg pressure?
What is the number of unpaired electrons present in ground state of Silicon and Chromium, respectively ?
What is the total number of electrons present in bonding and antibonding orbitals respectively in \(\text{F}_2\) molecule according to MO theory ?
The ratio of mass of 'x' atoms of an element to mass of carbon atoms is 9:1. Find the mass of 1 mol of x if molar mass of carbon is 12 g/mol.
Identify the linkage in backbone of single strand of DNA ?
Which of the following detergents is used as germicide?
Which of the following ionic species is present in hemoglobin and responsible for transformation of oxygen ?
Which of the following is not a basis of classification of polymers ?
Which of the following processes develops cross-links in elastomer?
Which of following observations is found in Tollens test for aldehydes?
Which of the following reactions uses diazonium salt ?
What is the common name for the simplest carboxylic acid, HCOOH ?
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 statements is NOT correct?
What is the nature of alcohols in aqueous medium?
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 undergoes \(\text{SN}^1\) reaction most readily?
Identify oxidation state of cobalt ion in the complex, \([\text{Co(NH}_3)_5\text{Br}]\text{SO}_4\) .
Which of the following alkyl halides is hydrolyzed most rapidly by the \(\text{SN}^2\) mechanism ?
Identify the factor responsible for colour of transition metal compounds.
What is order of radioactive decay of a substance ?
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? [ \(R\times 2.303 = 19.15 \text{JK}^{-1}\text{mol}^{-1}\)]