NTA JEE Main 7th January 2020 Shift 2

For the following reactions

where:

k$$_s$$ and k$$_e$$ are respectively the rate constants for substitution and elimination, and $$\mu = \frac{k_s}{k_e}$$, the correct option is

Consider the following reactions:

Which of these reactions are possible?

In the following reaction sequence, structures of A and B are, respectively

Cyclohexanone-CH$$_2$$Br $$\xrightarrow{\text{HBr}}$$ A $$\xrightarrow{\text{Na/Ether}}$$ (Intramolecular Product) B

In the following reaction sequence,

the major product B is

Which of the following statements is correct?

The standard heat of formation $$(\Delta_f H_{298}^0)$$ of ethane (in kJ/mol), if the heat of combustion of ethane, hydrogen and graphite are $$-1560$$, $$-393.5$$ and $$-286$$ kJ/mol, respectively is

3 g of acetic acid is added to 250 mL of 0.1 M HCl and the solution made up to 500 mL. To 20 mL of this solution $$\frac{1}{2}$$ mL of 5M NaOH is added. The pH of the solution is
[Given: pKa of acetic acid = 4.75, molar mass of acetic acid 60 g/mol, log 3 = 0.4771, Neglect any changes in volume]

Consider the following reactions:
NaCl + K$$_2$$Cr$$_2$$O$$_7$$ + H$$_2$$SO$$_4$$ (Conc.) $$\rightarrow$$ (A) + side products
(A) + NaOH $$\rightarrow$$ (B) + side products
(B) + H$$_2$$SO$$_4$$ + H$$_2$$O$$_2$$ (dilute) $$\rightarrow$$ (C) + side products
The sum of the total number of atoms in one molecule each of (A), (B) and (C) is

The flocculation value of HCl for arsenic sulphide sol is 30 mmolL$$^{-1}$$. If H$$_2$$SO$$_4$$ is used for the flocculation of arsenic sulphide, the amount, in grams, of H$$_2$$SO$$_4$$ in 250 ml required for the above purpose is (molecular mass of H$$_2$$SO$$_4$$ = 98 g/mol)

The number of sp$$^2$$ hybridised carbons present in "Aspartame" is