NTA JEE Mains 9th April 2024 Shift 1

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Both rhombic and monoclinic sulphur exist as $$S_8$$ while oxygen exists as $$O_2$$. Reason (R) : Oxygen forms $$p\pi - p\pi$$ multiple bonds with itself and other elements having small size and high electronegativity like C, N, which is not possible for sulphur. In the light of the above statements, choose the most appropriate answer from the options given below :

On reaction of Lead Sulphide with dilute nitric acid which of the following is not formed?

$$0.05$$ M $$CuSO_4$$ when treated with $$0.01$$ M $$K_2Cr_2O_7$$ gives green colour solution of $$Cu_2Cr_2O_7$$. 

The two solutions are separated as shown below : [SPM : Semi Permeable Membrane]. Due to osmosis :

Electronic configuration of Cu(II) is $$3d^9$$ whereas that of Cu(I) is $$3d^{10}$$. Which of the following is correct?

The $$F^-$$ ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fluoroapatite having the formula.

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The total number of geometrical isomers shown by $$[Co(en)_2Cl_2]^+$$ complex ion is three. Reason (R) : $$[Co(en)_2Cl_2]^+$$ complex ion has an octahedral geometry. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : $$S_N2$$ reaction of $$C_6H_5CH_2Br$$ occurs more readily than the $$S_N2$$ reaction of $$CH_3CH_2Br$$. Reason (R) : The partially bonded unhybridized p-orbital that develops in the trigonal bipyramidal transition state is stabilized by conjugation with the phenyl ring. In the light of the above statements, choose the most appropriate answer from the options given below :

In the following sequence of reaction, the major products B and C respectively are :

Identify major product "X" formed in the following reaction :

What is the structure of C