Question

Onion can be used by a visually impaired person to detect the presence of HCl. Why?
1 point
HCl is acidic
Onion is basic
Onion is olfactory indicator
Onion can undergo chemical change by HCl

Answer 1

Answer:

1)Onion has a characteristic smell. When a basic solution like sodium hydroxide solution is added to a cloth strip treated with onion extract then the onion smell cannot be detected.An acidic solution like hydrochloric acid does not destroy the smell of onions. This can be used as a test for acids and bases.