List of top Chemistry Questions

2 mole of ideal gas at 27ºC temp. is expanded reversibly from 2 lit. to 20 lit. Find entropy change (R = 2 cal/mol K) 

In $NO_3^-$ ion number of bond pair and lone pair of electrons on nitrogen atom are :-

In Hydrozen atom, energy of first excited state is – 3.4 eV. Then find out KE of same orbit of Hydrogen atom 

Imino acid among these compounds is
Organic acid without a carboxylic acid group is
An ester used as medicine is
Reaction of aniline with benzaldehyde is
Smallest among these species is
Which of the following will not show geometrical isomerism?
Who gave the law of conservation of mass?

A solution contains non volatile solute of molecular mass M2. Which of the following can be used to calculate the molecular mass of solute in terms of osmotic pressure 

Which of the following is not a drying and dehydrating agent?
The molecular mass of $ KMn{{O}_{4}} $ is M. The equivalent weight of $ KMn{{O}_{4}} $ , when it is converted into $ KMn{{O}_{4}} $ is:
Which of the following has the highest dipole moment?
When $KMnO_4 $acts as an oxidising agent and ultimately forms $MnO^{2-}_4, MnO_2, Mn_2O_3 \, and \, Mn^{2+}$. Then the number of electrons transferred in each case respectively
Teflon is a polymer of
The normality of mixture obtained by mixing $100\, mL$ of $0.2\, M H _{2} SO _{4}$ and $200\, mL$ of $0.2 \,M\,HCl$ is :
When a graph is plotted between log K and $ \left( \frac{1}{T} \right), $ the slope of line obtained represents: (K = rate constant, T = temperature)
Consider the chemical reaction, $N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$ .The rate of this reaction can be expressed in terms of time derivatives of concentration of $N_2(g), H_2(g) or NH_3(g)$. Identify the correct relationship amongst the rate expressions
For the reaction : $ {H2 + Cl2 ->[{\text{sunlight}}] 2HCl}$ the order of reaction is
How many moles of electron weighs 1 kg?
Atoms can neither be created nor destroyed. Under similar condition of temperature and pressure, equal volume of gases does not contain equal number of atoms.
Which of the following molecular species has unpaired electron (s)?
A similarity between optical and geometrical isomerism is that
A solution of an acid has pH = 4.70. Find out the number of $OH^-$ ions $(pK_w = 14)$