List of top Chemistry Questions asked in JEE Main

Number of compounds from the following which will not produce orange red precipitate with Benedict solution is ____________
Glucose, maltose, sucrose, ribose, 2-deoxyribose, amylose, lactose

The number of correct statement from the following is _________ .
A. For 1s orbital, the probability density is maximum at the nucleus
B. For 2s orbital, the probability density first increases to maximum and then decreases sharply to zero.
C. Boundary surface diagram of the orbitals encloses a region of 100% probability of finding the electron.
D. p and d-orbitals have 1 and 2 angular nodes respectively E. probability density of p-orbital is zero at the nucleus

The volume of hydrogen liberated at STP by treating 2.4 g of magnesium with excess of hydrochloric acid is _________ × 10^–2 L
Given : Molar volume of gas is 22.4 L at STP.
Molar mass of magnesium is 24 g mol^–1

The number of possible isomeric products formed when 3-chioro-1-butene reacts with HCl through carbocation formation is __________

4.5 moles each of hydrogen and iodine is heated in a sealed ten litre vessel. At equilibrium, 3 moles of HI were found. The equilibrium constant for H₂(g) + I₂(g) ⇋ 2HI(g) is _____________ .

Which of the following expressions is correct in case of a C_SCl unit cell (edge length, a) ?

Consider the following statements:
(A) NF3 molecule has a trigonal planar structure. 
(B) Bond length of N2 is shorter than O2. 
(C) Isoelectronic molecules or ions have identical bond order. 
(D) Dipole moment of H2S is higher than that of water molecule. 
Choose the correct answer from the option below

Which of the following statement (s) is (are) correct?
(a) The pH of 1 .0 x 10-8M solution of HCl is 8  
(b) The conjugate base of H2PO-4 is HPOI2-4  
(c) Autoprotolysis constant of water increases with temperature 
(d) When a solution of a weak monoprotic acid is treated against a strong base, at half - neutralisation point pH = (\(\frac{1}{2}\))pK_a.
Choose the correct answer from the the options given below

During water-gas shift reaction

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion (A): B_eCl₂ and MgCl₂ produce characteristic flame. 
Reason (R) : The excitation energy is high in B_eCl₂ and MgCl₂ 
In the light of the above statements, choose the correct answer from the option given below

The complex with highest magnitude of crystal field splitting energy (Δ0) is

A' formed in the above reaction is

Decreasing order of reactivity towards electrophilie substitution for the following compounds is

In the above conversion the correct sequence of reagents to be added is

The Product formed in the following multistep reaction is

Consider the following sequence of reactions:

The product 'B' is

Match List I with List II:

List I - (Monomer)	List II - (Polymer)
(A) Tetrafluoroethene	(I) Orlon
(B) Acrylonitrile	(II) Natural rubber
(C) Caprolactam	(III) Teflon
(D) Isoprene	(IV) Nylon-6

Choose the correct answer from the options given below:

Which is not true for arginine?

Which of the following statement is correct for paper chromatography?

\(2 I O^ − _3 + x I ^− + 12 H ^+ ⟶ 6 I_ 2 + 6 H _2 O\) What is the value of x?

The reaction \(\frac{ 1}{2}\)H₂(g) + AgCl(s) → H⁺(aq) + Cl^-(aq) + Ag(s) occurs in which of the given galvanic cell.

Which of the following represent the Freundlich adsorption isotherms?




Choose the correct answer from the options given below: 

Which of the following complex is octahedral, diamagnetic and the most stable?

The correct order of spin only magnetic moments for the following complex ions is