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Tests for halide ions in salt analysis

This type of question, asked 3 times: 31 Jan 2024, 4 Apr 2024, 6 Apr 2024. All 3 questions below, oldest first.

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  1. Question 1

    31 Jan 2024

    51
    Molar mass of the salt from NaBr,NaNO3,KINaBr,NaNO_{3},KI and CaF2CaF_{2} which does not evolve coloured vapours on heating with concentrated H2SO4H_{2}SO_{4} is _______ gmol−1gmol^{- 1}, (Molar mass in g mol−1g\ mol^{-1}: Na 23, N 14, K 39, O 16, Br 80, I 127, F 19, Ca 40)

  2. Question 2

    4 Apr 2024

    123
    When MnO2MnO_{2} and H2SO4H_{2}SO_{4} is added to a salt (A), the greenish yellow gas liberated as salt (A) is :

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  3. Question 3

    6 Apr 2024

    125
    During the detection of acidic radical present in a salt, a student gets a pale-yellow precipitate soluble with difficulty in NH4OHNH_{4}OH solution when sodium carbonate extract was first acidified with dil. HNO3HNO_{3} and then AgNO3AgNO_{3} solution was added. This indicates presence of:

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