List of top Chemistry Questions asked in JEE Main

Match List I with List II

LIST-I	LIST-II
A. K2[Ni(CN)4]	I. sp3
B. [Ni(CO)4]	II. sp3d2
C. [Co(NH3)6]Cl3	III. dsp2
D. Na3[CoF6]	IV. d2sp3

Choose the correct answer from the options given below:

Which among the following aldehydes is most reactive towards nucleophilic addition reactions?

Element not showing variable oxidation state is:

Which one of the following molecules has maximum dipole moment ?

The electronic configuration of Einsteinium is :(Given atomic number of Einsteinium = 99)

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The stability order of \(+1\) oxidation state of Ga, In, and Tl is \( \text{Ga}<\text{In}<\text{Tl} \).
Reason R: The inert pair effect stabilizes the lower oxidation state down the group.
In the light of the above statements, choose the correct answer from the options given below:

Choose the correct statements from the following:
A. All group 16 elements form oxides of general formula \( EO_2 \) and \( EO_3 \) where \( E = S, Se, Te, \) and Po. Both the types of oxides are acidic in nature.
B. TeO\(_2\) is an oxidising agent while SO\(_2\) is reducing in nature.
C. The reducing property decreases from H\(_2\)S to H\(_2\)Te down the group.
D. The ozone molecule contains five lone pairs of electrons.
Choose the correct answer from the options given below:

Which of the following can not act as an oxidising agent?

Identify product A and product B :

Which structure of protein remains intact after coagulation of egg white on boiling?

The number of species from the following which are paramagnetic and with bond order equal to one is ___.

Species: H₂, He₂⁺, O₂^-, N₂, O₂^2-, F₂, Ne₂⁺, B₂

How many of the following compounds have \(sp^3\) hybridized central atoms?
\(H_2O, NH_3, SiO_2, SO_2, CO, CH_4\) and \(BF_3\)

What is the correct IUPAC name of the given compound?

Match List I with List II

Choose the correct answer from the options given below:

What is the order of reducing character for \(AsH_3, NH_3, PH_3\) (group \(15\) hydrides)?

Which of the following compounds in 3d series does not show +3 oxidation state?

Which of the following sets of elements can be detected by Lassaigne's Test ?

A \(10\) \(mL\) hydrocarbon \((C_2H_4)\) on combustion give \(40\) \(mL\) \(CO_2\) and \(50\) \(mL\) \(H_20\). Calculate the value of \(x+y\)

Which of the following has the highest 3rd ionization energy?

Number of radial nodes present in 3p are

Which of the following have a trigonal bipyramidal shape?
\(PF_5, PBr_5, [PtCl_4], SF_6, BF_3, BrF_5, PCl_5, [Fe(CO)_5]\)

Which of the following is correct for adiabatic free expansion against vacuum?

Complementary stand of DNA ATGCTTCA is:

Given below are two statements :
Statement I : Gallium is used in the manufacturing of thermometers.
Statement II : A thermometer containing gallium is useful for measuring the freezing point (256 K) of brine solution.
In the light of the above statement, choose the correct answer from the options given below :

An ideal gas undergoes a cyclic transformation starting from the point \( A \) and coming back to the same point by tracing the path \( A \to B \to C \to A \) as shown in the diagram. The total work done in the process is \( \_\_\_\_ \) J.