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JEE Main & Advanced Chemistry The p-block Elements-II / p-ब्लॉक तत्व-II Question Bank Self Evaluation Test - The p-Block Elements (Group 13 and Group 14)

  • question_answer
    An aqueous solution of \[FeS{{O}_{4}},A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\] and chrome alum is heated with excess of \[N{{a}_{2}}{{O}_{2}}\] and filtered. The materials obtained are:

    A) a colourless filtrate and a green residue

    B) a yellow filtrate and a green residue

    C) a yellow filtrate and a brown residue

    D) a green filtrate and a brown residue

    Correct Answer: C

    Solution :

    [c] The filtrate is yellow due to \[CrO_{4}^{2-}\] ion and residue is brown due to \[Fe{{\left( OH \right)}_{3}}.\]


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