NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 13 & 14)Practice
Certain organic compound on combustion produces three gaseous oxides A, B and C. A and C turned lime water milky, B turned anhydrous C u S O 4 blue and C turned K 2 C r 2 O 7 solution green. The elements present in organic compounds are
Options
- AC, N, O
- BC, H, S
- CC, H only
- DC, S only
Correct answer
B. C, H, S
Step-by-step solution
The elements present in organic compounds are C, H, S and their oxides are C O 2 , H 2 O , S O 2 respectively. C O 2 turns lime water milky, water turns anhydrous copper sulphate blue and S O 2 being reducing agent can reduce K 2 C r 2 O 7 into green coloured C r 3 + compound C r C l 3 etc.