Salt (A) gives brick red fumes (B) with conc. H2SO4 and K2Cr2O7 which gives yellow solution (C) with NaOH and it gives yellow ppt. (D) with acetic acid and lead acetate. What is (C)?

Question

Prashant Kotian · Accepted Answer

Correct answer: A. Step 1: Heating a chloride salt like NaCl with conc. H2SO4 and K2Cr2O7 produces orange-red chromyl chloride (CrO2Cl2) vapours (B). Step 2: Passing CrO2Cl2 vapours into NaOH solution forms a yellow solution of sodium chromate (Na2CrO4) (C). Step 3: Therefore, the yellow solution (C) is Na2CrO4, which corresponds to option (a).

💡 Solution & Explanation

Practice 22,000+ questions like this