List of top Chemistry Questions

For the reversible reaction,$ {N_2 (g) + 3H_2 (g) <=> 2NH_3 (g) + heat} $ the equilibrium shifts in forward direction

According to the adsorption theory of catalysis, the speed of the reaction increases because

In the following transition metals, the maximum number of oxidation states are exhibited by

Which of the following undergoes nucleophilic substitution exclusively by $S_N$1 mechanism?

Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne?

1 M and 2.5 litre NaOH solution mixed with another 0.5 M and 3 litre NaOH solution. Then find out molarity of resultant solution : -

The van der Waals equation of state reduces itself to the ideal gas equation at

The energy of second Bohr orbit of the hydrogen atom is $-328\, kJ\, mol^{-1},$ hence the energy of fourth Bohr orbit would be

When phenol is treated with $CHCl_3$ and NaOH, the product formed is :-

Which one of the following methods is neither meant for the synthesis nor for separation of amines ?

Marsh gas mainly contains

For decolourisation of $1$ mole of acidified $KMnO_4$ the moles of $H_2O_2$ required are

Lanthanoid contraction is caused due to

The noble gas forming maximum number of compounds is

Which of the following is soluble in water?

Which of the following will decolourise alkaline $KMnO_4$ solution?

2.76 g of silver carbonate on being strongly heated yields a residue weighing

The largest number of molecules is in

The total number of electrons in one molecule of carbon dioxide is

When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is

The compound which contains both ionic and covalent bonds is

The temporary hardness of water is due to calcium bicarbonate can be removed by adding

Ammonia gas can be dried by

Consider the following species: N^3- , O^2-, F^-, Na⁺, Mg²⁺ and Al³⁺ 

1. What is common in them? 
2. Arrange them in the order of increasing ionic radii.

Equal volume of 1 M HCI and 1 M H2SO4 neutralized by dil. NaOH and heat released is x and y kcal respectively, then which is correct?