List of top Chemistry Questions

Aqueous CuSO$_4$ changes its colour from sky blue to deep blue on addition of NH$_3$ because

Identify A, B, and C in the following reactions:

For a reaction, $ 2A + B \to \text{products} $, if concentration of B is kept constant and concentration of A is doubled, then rate of reaction is
For an adiabatic change in a system, the condition which is applicable is
In dilute alkaline solution, $ \text{MnO}_4^- $ changes to

Which of the following complex show optical isomerism?
$(i) \text{cis} - [\text{COCl}(\text{en})_2 (\text{NH}_3)]^{2+} $ 
$(ii) \text{cis} - [\text{CrCl}_2(\text{ox})_2]^{3-}$ 
$(iii) \text{cis} - [\text{CO}(\text{en})_2\text{Cl}_2]\text{Cl}$ 
$(iv) \text{cis} - [\text{CO}(\text{NH}_3)_4 \text{Cl}_2]^+$

The following reaction takes place:

Mohr's salt has the formula

The product P in the reaction,

Gabriel's synthesis is used frequently for the preparation of which of the following? 

Acetophenone when reacted with a base, $ C_6H_5ONa $, yields a stable compound which has the structure

Product of the following reaction is

Which of the following hexoses will form the same osazone when treated with excess phenyl hydrazine?
Match List-I with List-II :

List I

(Reagents Used)

 

List II

(Compound with Functional group detected)

AAlkaline solution of copper sulphate and sodium citrateI
BNeutral FeCl3 solutionII
CAlkaline chloroform solutionIII
DPotassium iodide and sodium hypochloriteIV

Choose the correct answer from the options given below :

Gadolinium has a low value of third ionisation enthalpy because of

Match List-I with List – II :
 List-I (Oxoacids of Sulphur) List-II (Bonds)
APeroxodisulphuric acid ITwo S–OH, Four S=O, One S–O–S
BSulphuric acid IITwo S–OH, One S=O
CPyrosulphuric acidIIITwo S–OH, Four S=O, One S–O–O–S
DSulphurous acidIVTwo S–OH, Two S=O 
Choose the correct answer from the options given below.

Pumice stone is an example of -

Identify the final product [D] obtained in the following sequence of reactions.
final product [D]
Which complex compound is most stable?
Consider the following compounds/species: 
compounds/species
The number of compounds/species which obey Huckel’s rule is ______.
Consider the following compounds/species:
i) compounds/species
ii) compounds/species
iii)compounds/species
iv)compounds/species
v)compounds/species
vi)compounds/species
vii)compounds/species
The number of compounds/species which obey Huckel's rule is _____
What fraction of one edge centred octahedral void lies in one unit cell of fcc?
Identify the major product obtained in the following reaction: 
Identify the major product obtained in the following reaction:

The reaction that does NOT take place in a blast furnace between 900 K to 1500 K temperature range during extraction of iron is? 

Which amongst the following be most readily dehydrated under acidic conditions?