NTA JEE Main 25th January 2023 Shift 2

Given below are two statements:-
Statement I: In froth floatation method a rotating paddle agitates the mixture to drive air out of it.
Statement II: Iron pyrites are generally avoided for extraction of iron due to environmental reasons.
In the light of the above statements, choose the correct answer:

A chloride salt solution acidified with dil. HNO$$_3$$ gives a curdy white precipitate, [A], on addition of AgNO$$_3$$. [A] on treatment with NH$$_4$$OH gives a clear solution, B.

Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from

Match List I with List II
List I                                   List II
 Coordination entity           Wavelength of light absorbed in nm
A. [CoCl(NH$$_3$$)$$_5$$]$$^{2+}$$               I. 310
B. [Co(NH$$_3$$)$$_6$$]$$^{3+}$$                 II. 475
C. [Co(CN)$$_6$$]$$^{3-}$$                   III. 535
D. [Cu(H$$_2$$O)$$_4$$]$$^{2+}$$                 IV. 600
Choose the correct answer from the options given below :-

Find out the major product from the following reaction.

'A' in the given reaction is

Given below are two statements,one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Butylated hydroxyl anisole when added to butter increases its shelf life.
Reason R: Butylated hydroxyl anisole is more reactive towards oxygen than food.
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 (Amines)                List II (pKb)
A. Aniline                           I. 3.25
B. Ethanamine                    II. 3.00
C. N-Ethylethanamine         III. 9.38
D. N,N-Diethylethanamine   IV. 3.29
Choose the correct answer from the options given below:-

Match List I with List II
List I (Name of polymer)   List II (Uses)  
A. Glyptal                             I. Flexible pipes
B. Neoprene                         II. Synthetic wool
C. Acrilan                             III. Paints and Lacquers
D. LDP                                  IV. Gaskets
Choose the correct answer from the options given below :-

A. Ammonium salts produce haze in atmosphere.
B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals.
C. Polychlorinated biphenyls act as cleansing solvents.
D. 'Blue baby' syndrome occurs due to the presence of excess of sulphate ions in water.
Choose the correct answer from the options below:-