List of top Chemistry Questions

Sodium crystallizes in bcc structure with radius 1.86 \(\times\) 10\(^{-8}\) cm. What is the edge length of unit cell of sodium?
What is the molar conductivity at infinite dilution of \(\text{CaCl}_2\), if the molar conductivity of \(\text{Ca}^{2+}\) ion and \(\text{Cl}^-\) ion at infinite dilution is \(119\) and \(71~\Omega^{-1}\text{cm}^2\text{mol}^{-1}\) respectively?
What will be the concentration of NaCl solution, if the molar conductivity and conductivity of NaCl solution are 124.3 \(\Omega^{-1}\)cm\(^2\)mol\(^{-1}\) and 1.243 × 10\(^-4\) \(\Omega^{-1}\)cm\(^1\) respectively?
Which of the following is NOT found in hybridization?
Which among the following oxides of nitrogen is a brown coloured gas?
How many hydroxy groups are present in hydroxyquinol?
Which among the following reagents is used to obtain gluconic acid from glucose?
Which among the following carbocation is most reactive?
The rate constant for first order reaction is 0.02232 min\(^{-1}\). Calculate the time required for 75% completion of the reaction.
The half life of a first order reaction is 6.0 hours. How long will it take for the concentration of reactant to decrease from 0.4 M to 0.12 M?
Reaction given below follows first order kinetics.
2N\(_2\)O\(_5\) \(\rightarrow\) 4NO\(_2\) + O\(_2\)
Calculate rate constant of reaction if concentration of N\(_2\)O\(_5\) is 0.05 M and rate of reaction is \(1.5 \times 10^{-6}\) mol L\(^{-1}\) s\(^{-1}\).
Which of the following amine is most basic in nature?
What is the oxidation number of As in H\(_3\)AsO\(_3\)?
Which of the following compounds is NOT present in its standard state at 25\(^\circ\)C and 1 atmosphere pressure?
The reaction \( 2R - Cl + CoF_2 \rightarrow 2R - F + CoCl_2 \) is an example of .......
Identify the formula of lanthanoid oxide formed when lanthanoid (Ln) is burnt in oxygen.
Which metal from the following has the highest tendency to undergo oxidation?

Identify 'A' in the following reaction: 
\(\text{2 A + (C\(_6\)H\(_5\)CH\(_2\))\(_2\)Cd $\xrightarrow{}$ 2 CH\(_3\)-C-CH\(_2\)-C\(_6\)H\(_5\) + CdCl\(_2\)} \)
 

Which of the following is NOT a role of histamine?
Which of the following is NOT having any food value?
Which of the following compounds is used to avoid oxidation in food?
Which among the following compounds contains phantom atom?
At what new pressure will 100 mL of a gas at pressure 720 mm occupy volume of 84 mL, keeping temperature constant?
Which among the following methods is NOT suitable for the preparation of alkyl chlorides?
Which among the following statements is true for amylose?