NTA JEE Main 25th January 2023 Shift 2

Statement I: Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre.
Statement II: The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules.
In the light of the above statements, choose the most appropriate answer:

When the hydrogen ion concentration [H$$^+$$] changes by a factor of 1000, the value of pH of the solution

Match List I with List II
A. Cobalt catalyst        I. (H$$_2$$ + Cl$$_2$$) production
B. Syngas                     II. Water gas production
C. Nickel catalyst        III. Coal gasification
D. Brine solution         IV. Methanol production
Choose the correct 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: The alkali metals and their salts impart characteristic colour to reducing flame.
Reason R: Alkali metals can be detected using flame tests.
In the light of the above statements, choose the most appropriate answer from the options given below

Which one among the following metals is the weakest reducing agent?

Which of the following represents the correct order of metallic character of the given elements?

Given below are two statements,one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Carbon forms two important oxides CO and CO$$_2$$. CO is neutral whereas CO$$_2$$ is acidic in nature.
Reason R: CO$$_2$$ can combine with water in a limited way to form carbonic acid, while CO is sparingly soluble in water.
In the light of the above statements, choose the most appropriate answer from the options given below :-

Match List I with List II.
              List I                                                         List II.
A. Propanamine and N-Methylethanamine          I. Metamers
B. Hexan-2-one and Hexan-3-one                        II. Positional isomers
C. Ethanamide and Hydroxyethanimine             III. Functional isomers
D. o-nitrophenol and pnitrophenol                     IV. Tautomers
Choose the correct answer from the options given below :-

The isomeric deuterated bromide with molecular formula C$$_4$$H$$_8$$DBr having two chiral carbon atoms is

What is the mass ratio of ethylene glycol (C$$_2$$H$$_6$$O$$_2$$, molar mass = 62 g/mol) required for making 500 g of 0.25 molal aqueous solution and 250 mL of 0.25 molar aqueous solution?