List of top Questions asked in JEE Main- 2021

Which one of the following is the correct PV vs P plot at constant temperature for an ideal gas ? (P and V stand for pressure and volume of the gas respectively) 

The water soluble protein is :

Match List - I with List - II : 

Choose the most appropriate answer from the options given below : 
 

Consider the given reaction, percentage yield of : 

The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO₄·5H₂O, respectively, are :
Potassium permanganate on heating at 513 K gives a product which is :
Tyndall effect is more effectively shown by:
Ellingham diagram is a graphical representation of :

Which one of the following compounds will give orange precipitate when treated with 2,4-dinitrophenyl hydrazine ? 

The number of S=O bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are :

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

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 :
The correct shape and I-I-I bond angles respectively in $I_3^-$ ion are :

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

 

Spin only magnetic moment in BM of \( [\text{Fe(CO)}_4(\text{C}_2\text{O}_4)]^+ \) is :

The major product formed in the following reaction is : 

Consider the above reaction and identify "Y". 

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 :

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

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 :