List of top Chemistry Questions

2A \(\rightarrow\) B + C
It would be a zero-order reaction when
An aqueous solution of $1M \,NaCl$ and $1M \,HCl$ is:
Unit of entropy is : -
Which has maximum number of molecules :-

Number of atom per unit cell in B.C.C.

General electronic configuration of lanthanides is

When phenol is treated with CHCl3 and NaOH, the product formed is 

Solution of $0.1 \,N\, NH_4OH$ and 0.1 N $NH_4Cl$ has pH 9.25. Then $pK_b$ of $NH_4OH$ :-
Z in the above reaction sequence is :-
Which of the following is diamagnetic?
In which of the solutions containing following solutes, its normality is equal to its molarity?
Which of the following is the strongest Lewis acid?
Which one of the following in presence of sunlight will react with chlorine to give benzyl chloride?
$N_{2}$ and $CO$ are:
Which of the following has maximum unpaired electrons?
Non-Ianthanide element is:
Which of the following is a Lewis base?
Which of the following non-metal possesses the atomicity half that of sulphur?
How many 'd' electrons are present in $Cr^{2+}$ ion ?

The hypothetical complex chloro diaquatriammine cobalt (III) chloride can be represented as 

In electrolysis of NaCl when Pt electrode is taken then $H_2$ is liberated at cathode while with Hg cathode it forms sodium amalgam :-
Which of the following statements is true:-
An atom has electronic configuration $ 1s^2, 2s^2 \, 2p^6, \, 3s^2 \, 3p^6 \, 3d^3, \, 4s^2$, you will place it in which group : -
In a closed insulated container a liquid is stirred with a paddle to increase the temperature which of the following is true : -

Which of the following shows maximum number of oxidation states