Which of the following solid salts

CHEMISTRY · Single correct · CBSE · Chemistry · Classification of Elements and Periodicity in Properties · Classification of Elements and Periodicity in Properties

Problem

Which of the following solid salts, on heating with solid

\mathrm{K_2Cr_2O_7}

and concentrated

\mathrm{H_2SO_4}

, evolves orange-red vapours that turn aqueous

\mathrm{NaOH}

solution yellow? (1)

\mathrm{NaBr}

(2)

\mathrm{NaCl}

(3)

\mathrm{NaNO_3}

(4)

\mathrm{NaI}

Related theory

Characteristics of special groups
Alkane reactions
Hydrocarbons
Periodic Trends in Chemical Properties
Classification of Elements and Periodicity in Properties

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