Neet Solved Paper 2015 Question 10
Question: Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other?
Options:
A) Forms’ acid-rain
B) Is a reducing agent
C) Is soluble in water
D) Is used as a food-preservative
Show Answer
Answer:
Correct Answer: D
Solution:
(a) Nitrogen dioxide and sulphur dioxide forms acid rain. ‘Acid rain’ is the rain water containing sulphuric acid and nitric acid.
$ HNO _2+2H _2\text{O }+O _2\xrightarrow{,}4HNO _3 $ $ ~2SO _2+2H _2\text{O }+{O_2}\xrightarrow{,}2H _2SO _4 $
(b) $ NO _2 $ and $ SO _2 $ act as a good reducing agent e.g. $ SO _2 $ reduces halogens to halogen acid $ Cl _2+2H _2O+SO _2\to 2HCl+H _2SO _4 $
(c) $ NO _2 $ and $ SO _2 $ both are soluble in water.
(d) $ SO _2 $ is used in the manufacture of sodium bisulphite ( $ NaHSO _3 $ ) which is used as a preservative for jams, jellies and squashes.
