NTA JEE Main 15th April 2023 Shift 1

Given below are two statements
Statement I : According to Bohr's model of hydrogen atom, the angular momentum of an electron in a given stationary state is quantised.
Statement II : The concept of electron in Bohr's orbit, violates the Heisenberg uncertainty principle. In the light of the above statements, choose the most appropriate answer from the options given below

Consider the following statement
(A) NF$$_3$$ molecules has a trigonal planar structure.
(B) Bond Length of N$$_2$$ is shorter than O$$_2$$.
(C) Isoelectronic molecules or ions have identical bond order.
(D) Dipole moment of H$$_2$$S is higher than that of water molecule.
Choose the correct answer from the options given below:

Which of the following statement(s) is/are correct?
(A) The pH of $$1 \times 10^{-8}$$ M HCl solution is 8.
(B) The conjugate base of H$$_2$$PO$$_4^-$$ is HPO$$_4^{2-}$$.
(C) K$$_w$$ increases with increase in temperature.
(D) When a solution of a weak monoprotic acid is titrated against a strong base at half neutralisation point, pH $$= \frac{1}{2}$$pK$$_a$$. Choose the correct answer from 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) : BeCl$$_2$$ and MgCl$$_2$$ produce characteristic flame
Reason (R) : The excitation energy is high in BeCl$$_2$$ and MgCl$$_2$$
In the light of the above statements, choose the correct answer from the options given below:

For a good quality cement, the ratio of silica to alumina is found to be

Which of the following statement is correct for paper chromatography?

Decreasing order of reactivity towards electrophilic substitution for the following compounds is:

The product formed in the following multistep reaction is:

The possibility of photochemical smog formation will be minimum at