Which of the following in air, forms compounds readily?

What is the basicity of oleum?

When a flask containing sodium thiosulfate is placed over a paper marked with ‘X’ and HCl added to it, the ‘X’ seems to …

How many allotropes does nitrogen have?

What product is formed when iron metal is dipped into concentrated nitric acid?

What is the electronic configuration of chloride?

Which of the following is not formed on hydrolysis of PCl5?

What is the maximum covalency of the nitrogen atom?