List of top Questions asked in JEE Main

The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation

Arrange the following carbocations in increasing order of their stability.
I) \((CH_3)_3C^{\oplus}\)
II) \((CH_3)_2\overset{{\oplus}}{C}H\)
III) \(\overset{{\oplus}}{C}H_3\)
IV) \(CH_3\overset{{\oplus}}{C}H_2\)

Which of the following cation will give green colour in Borax bead test

Given below are two statements:
Statement I : Chlorine can easily combine with oxygen to form oxides; and the product has a tendency to explode
Statement II : Chemical reactivity of an element can be determined by its reaction with oxygen and halogens
In the light of the above statements, choose the correct answer from the options given below

Equanil drug is used for which disease?

Given below are two statements:
Statement I: Tropolone is an aromatic compound and has 8л electrons. 
Statement II: electrons of >C = O group in tropolone is involved in aromaticity. 
In the light of the above statements, choose the correct answer from the options given below

An aromatic compound 'A' C7H6Cl2  gives white precipitate on boiling with AgNO3 solution and yields C7H7OCl on treatment with NaOH.  'A' on oxidation gives a monochloro benzoic acid which affords only one mononitroderivative.  The compound A is:

Which of the following are the Green house gases?
A. Water vapour 
B. Ozone 
C. 1₂ 
D. Molecular hydrogen 
Choose the most appropriate answer from the options given below

Which of the following will be oxidized by \(HIO_4\)?

Product B is:

What is the correct order of strength of following ligands according to the spectrochemical series?

Arrange the following in increasing order of acidity.

Which of the following is a functional isomer of Dimethyl ether?

Find out the shortest wavelength of paschen series for H- atom

Resonance in carbonate ion $\left( CO _3{ }^{2-}\right)$ is

Which of the following is true?

What happens when methane undergoes combustion in systems A and B respectively?

Which of the following complexes will exhibit maximum attraction to an applied magnetic field?

For the reaction:

Product (P) is

How many of the given statements are true for fuel cell? 
A. It is a type of Galvanic cell 
B. It is used for providing electrical power in space programmes. 
c. Hydrogen and oxygen are bubbled through porous carbon electrodes into concentrated NaOH solution 
D. It produces electricity with an efficiency of 40% 
E. It is pollution free cell

Select the correct options:
Statement 1: Benzene sulphonyl chloride reacts with 1°, 2° and 3° amines.
Statement 2: All products of the reaction above are soluble in NaOH.

Which of the following statements is incorrect?

Which of the following statement is incorrect-

Consider the reaction:
Fe₂0₃(s) + 3CO(g) = 2Fe(s) + 3CO₂(g)
Which of the following will not affect the equilibrium state:
(I) Addition of Fe₂O₃
(II) Addition of CO₂
(III) Decreasing mass of Fe₂O₃
(IV) Removal of CO

We have two complexes, [Fe(H₂O)₆]²⁺ and [Cu(H₂O)₆]²⁺ , the magnetic properties respectively are