List of top Chemistry Questions asked in JEE Main

Match List - I with List - II : 

Choose the most appropriate answer from the options given below : 
 

Ellingham diagram is a graphical representation of :

Consider the given reaction, percentage yield of : 

Tyndall effect is more effectively shown by:
Potassium permanganate on heating at 513 K gives a product which is :
The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO₄·5H₂O, respectively, are :
The number of S=O bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are :
Which of the following reagent is used for the following reaction ? $CH_3CH_2CH_3 \to CH_3CH_2CHO$

The correct structures of trans-[NiBr₂(PPh₃)₂] and meridional-[Co(NH₃)₃(NO₂)₃], respectively, are : 

Given below are two statements : Statement I : Non-biodegradable wastes are generated by the thermal power plants. Statement II : Bio-degradable detergents lead to eutrophication. In the light of the above statements, choose the most appropriate answer from the options given below :

Which of the following reagent is suitable for the preparation of the product in the above reaction ? (reaction of ketone to alkane)

The compound/s which will show significant intermolecular H-bonding is/are : 

 

What is the correct sequence of reagents used for converting nitrobenzene into m-dibromobenzene ? 

The major product formed in the following reaction is : 

Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :
The bond order and magnetic behaviour of O\(_2^-\) ion are, respectively :
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Lithium halides are some what covalent in nature.
Reason R : Lithium possess high polarisation capability.
In the light of the above statements, choose the most appropriate answer from the options given below :
Spin only magnetic moment in BM of \( [\text{Fe(CO)}_4(\text{C}_2\text{O}_4)]^+ \) is :
Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is :

The correct options for the products A and B of the following reactions are : 

The nature of oxides V\(_2\)O\(_3\) and CrO is indexed as 'X' and 'Y' type respectively. The correct set of X and Y is:
The sol given below with negatively charged colloidal particles is :
Given below are two statements :
Statement I: Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper.
Statement II: It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a froth flotation method.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Barium carbonate is insoluble in water and is highly stable.
Reason (R) : The thermal stability of the carbonates increases with increasing cationic size.
Choose the most appropriate answer from the options given below :

Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value.