NTA JEE Main 31st January 2023 Shift 2

When a hydrocarbon A undergoes complete combustion it requires 11 equivalents of oxygen and produces 4 equivalents of water. What is the molecular formula of A?

Arrange the following orbitals in decreasing order of energy.
A. n = 3, l = 0, m = 0
B. n = 4, l = 0, m = 0
C. n = 3, l = 1, m = 0
D. n = 3, l = 2, m = 1
The correct option for the order is:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The first ionization enthalpy of 3d series elements is more than that of group 2 metals
Reason (R): In 3d series of elements successive filling of d-orbitals takes place.
In the light of the above statements, choose the correct answer from the options given below:

Incorrect statement for the use of indicator in acid-base titration is:

Given below are two statements:
Statement I: H$$_2$$O$$_2$$ is used in the synthesis of Cephalosporin
Statement II: H$$_2$$O$$_2$$ is used for the restoration of aerobic conditions to sewage wastes.
In the light of the above statements, choose the most appropriate answer from the options given below:

The element playing significant role in neuromuscular function and interneuronal transmission is:

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

In Dumas method for the estimation of N$$_2$$, the sample is heated with copper oxide and the gas evolved is passed over:

A hydrocarbon 'X' with formula C$$_6$$H$$_8$$ uses two moles of H$$_2$$ on catalytic hydrogenation of its one mole. On ozonolysis, 'X' yields two moles of methane dicarbaldehyde. The hydrocarbon 'X' is:

The normal rain water is slightly acidic and its pH value is 5.6 because of which one of the following?