S Block Elements Question 69
Question: A and B are two salts. A with dilute HCl and B with cone. $ H_2SO_4 $ react to give reddish brown vapours, hence a and B respectively are:
Options:
A) NaBr, $ NaNO_3 $
B) $ NaNO_3 $ , NaBr
C) NaBr, $ NaNO_2 $
D) $ NaNO_2 $ , NaBr
Show Answer
Answer:
Correct Answer: D
Solution:
[d] $ NaNO_2 $ gives $ NO_2 $ (brown) with dil. acids whereas NaBr and $ NaNO_2 $ both give brown vapours $ Br_2 $ and $ NO_2 $ respectively with cone. acids.
BETA
