List of top Chemistry Questions

Which of the following shows resonance but not hyperconjugation?
Which of the following reagents is used in Rosenmund reduction?
What is the molarity of a solution prepared by dissolving 8.0 g of NaOH in enough water to make 2.0 L of solution? (Molar mass of NaOH = 40 g/mol)
What is the molecular formula of a compound that has the empirical formula \( \text{CH}_2\text{O} \) and a molar mass of 90 g/mol?

Match the following: 

If \(N_2\) gas is bubbled through water at 293 K, how many moles of \(N_2\) gas would dissolve in 1 litre of water? Assume that \(N_2\) exerts a partial pressure of 0.987 bar. [Given \(K_H\) for \(N_2\) at 293 K is 76.48 K bar]
How do you prepare potassium manganate from pyrolusite ore?
Out of KMnO$_4$ and K$_2$MnO$_4$, which one is paramagnetic and why?
Why is the ability of oxygen greater than fluorine to stabilise higher oxidation states of transition metals?
Assertion (A): Vitamin C cannot be stored in our body.
Reason (R): Vitamin C is water soluble and excreted in urine.
Why is molecularity applicable only for elementary reactions and order is applicable for elementary as well as complex reactions?
Write two differences between DNA and RNA.
Why can azeotropic mixture not be separated by fractional distillation?
Assertion (A): Aquatic species are more comfortable in cold water than in warm water.
Reason (R): Solubility of oxygen gas in water decreases with increase in temperature.
Assertion (A): First ionisation enthalpy of Cr is lower than that of Zn.
Reason (R): Zinc is a non-transition element.
Deficiency of vitamin B$_1$ causes the disease :

The reaction

suggests that phenol is :

Which of the following amines does not give foul smell of isocyanide on heating with chloroform and ethanolic KOH ?

Anilinium hydrogen sulphate on heating at 453–473 K produces which of the following as a major product ?
Which of the following aqueous solutions will have the highest osmotic pressure ?
Which of the following haloalkanes is most reactive towards S$_N$2 reaction ?
Which of the following is the slope of the first order reaction in the plot of ln[R] vs. time ?
A conductivity cell usually consists of two :
With increase in atomic number, the melting point of transition metals :
An organic compound (X) having molecular formula C$_5$H$_{10$O can show various properties depending on its structures. Draw each of the structures if it :
shows Cannizzaro reaction.