Embibe Experts Solutions for Chapter: UPSC CDS (II) Previous Year Paper 2020, Exercise 3: General Knowledge

Pearls are harvested from

Wings of birds and bats are considered analogous structures because they have

Apart from hyper acid secretion, peptic ulcers are also developed due to bacterial infection. The causative agent is

A mixture of sodium chloride (salt) and ammonium chloride can be separated by

Symbol of an element was Introduced by

Identify the correct pair of elements among the following which are liquid at room temperature and standard pressure.

Which one of the following oxides shows both acidic and basic behavior?

Silver articles turn black when kept in the open for a longer time due to the formation of