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Topic Question Set

Q 11 :

Identify the correct statements :

A. Hydrated salts can be used as primary standard.
B. Primary standard should not undergo any reaction with air.
C. Reactions of primary standard with another substance should be instantaneous and stoichiometric.
D. Primary standard should not be soluble in water.
E. Primary standard should have low relative molar mass.

Choose the correct answer from the options given below :         [2026]

  • A, B and C Only

     

  • A, B, C and E Only

     

  • A, B and E Only

     

  • D and E Only

     

(1)

 

Q 12 :

Given below are two statements:

Statement I: Griess–Ilosvay test is used for the detection of nitrite ion, which involves the use of sulphanilic acid and α-naphthylamine reagent.

Statement II: In the above test, sulphanilic acid is diazotized by the acidified nitrite ion, which on further coupling with α-naphthylamine forms an azo-dye.

In the light of the above statements, choose the correct answer from the options given below:    [2026]

  • Both Statement I and Statement II are false

     

  • Statement I is true but Statement II is false

     

  • Both Statement I and Statement II are true

     

  • Statement I is false but Statement II is true

     

(3)