List of top Questions asked in JEE Main

If for z=α+iβ, |z+2|=z+4(1+i), then α +β and αβ are the roots of the equation

Let the shortest distance between the lines $L: \frac{x-5}{-2}=\frac{y-\lambda}{0}=\frac{z+\lambda}{1}, \lambda \geq 0$ and $L_1: x+1=y-1=4-z$ be $2 \sqrt{6}$ If $(\alpha, \beta, \gamma)$ lies on $L$, then which of the following is NOT possible?

The minimum value of the function $f(x)=\int\limits_0^2 e^{|x-t|} d t$ is :

Let α and β be real numbers. Consider a $3 \times 3$ matrix A such that $A^2 = 3A + \alpha I$. If $A^4 = 21A + \beta I$, then

Let the image of the point P(1, 2, 6) in the plane passing through the points A(1, 2, 0), B(1, 4, 1) and C(0, 5, 1) be Q (α, β, γ). Then (α² + β² + γ²) is equal to

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason $R$
Assertion A :

can be easily reduced using $Zn - Hg / HCl$ to

Reason R : $ Zn \cdot Hg / HCl$ is used to reduce carbonyl group to $- CH _2-$ group.

In the light of the above statements, choose the correct answer from the options given below:

The major product formed in the following reaction is

Given below are two statements, one is labelled as Assertion $A$ and the other is labeled as Reason $R$
Assertion A : The alkali metals and their salts impart characteristic colour to reducing flame
Reason R : Alkali metals can be detected using flame tests
In the light of the above statements, choose the most appropriate answer from the options given below

In which of the following pairs of elements electron gain enthalpy difference is highest?

Match the following List-I and List-II:

List-I	Industry	List-II	Waste Generated
(A)	Steel Plants	(I)	Gypsum
(B)	Thermal Power Plants	(II)	Fly ash
(C)	Fertilizer industries	(III)	Slag
(D)	Ppaer mills	(IV)	Bio-degradable Wastes

Choose the correct answer from the options given below:

Given below arc two statements:
Statement I : In the metallurgy process. sulphide ore is converted to oxide before reduction.
Statement II : Oxide ores in general are easier to reduce.
In the light of the above statements, choose the most appropriate answer from the options given below

In the above reaction. Left hand side and right hand side rings are named as 'A' and 'B' respectively. They undergo ring expansion. The correct statement for this process is:

Match List I with List II

	List I		List II
A	Nitrogen oxides in air	I	Eutrophication
B	Nitrogen oxides in air	II	Eutrophication
C	Carbon dioxide	III	Global warming
D	Phosphate fertilisers in water	IV	Acid rain

Choose the correct answer from the options given below:

Which of the following compounds are not used as disinfectants?
A. Chloroxylenol
B. Bithional
C. Veronal
D. Prontosil
E. Terpineol
Choose the correct answer from the options given below:

The major products ' A ' and ' B ', respectively, are

Total spin only magnetic moment of the ion [Mn(SCN)₆]^x– is 5.92 B.M. Find out the value of x.

Calculate mass of Tollen’s Reagent Required?

The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is
(excluding rearrangement)

Match List I with List II

List-I	Reaction	List-II	Reagents
(A)	Hoffmann Degradation	(I)	Conc.KOH,$\triangle$
(B)	Clemenson reduction	(II)	CHCl₃, NaOH/H₃O⁺
(C)	Cannizaro reaction	(III)	Br₂, NaOH
(D)	Reimer-Tiemann Reaction	(IV)	Zn-Hg/HCl

Choose the correct answer from the option given below:

Identify the incorrect option from the following:

The magnetic moment is measured in Bohr Magneton (BM).
Spin only magnetic moment of Fe in [Fe(H₂O)₆] ³⁺ and [Fe(CN)₆] ^3– complexes respectively is:

Given below are two statements :
Statement I: SbCI, is more covalent than SbCI3
Statement II: The higher oxides of halogens also tend to be more stable than the lower ones.
In the light of the above statements, choose the most appropriate answer from the options given below :

For lead storage battery pick the the correct statements.
A. During charging of battery, PbSO4 on anode is converted into PbO2
B. During charging of battery, PbSO4 on cathode is converted into PbO2
C. Lead storage battery, consists of grid of lead packed with PbO2 as anode
D. Lead storage battery has ~ 38% solution of sulphuric acid as an electrolyte
Choose the correct answer from the options given below:

The Lewis acid character of boron tri halides follows the order :

Match List I with List II

LIST I		LIST II
A	Cobalt catalyst	1	(H₂+Cl₂) production
B	Syngas	2	Water gas production
C	Nickel catalyst	3	Coal gasification
D	Brine solution	4	Methanol production

Choose the correct answer from the options given below: