Which of the following is commonly used in a laboratory desiccator?

The gaseous product$(s)$ expected at room temperature by the reaction of sodium borohydride and boron trifluoride under anhydrous conditions is/are:

Hydrogen has three isotopes. The number of possible diatomic molecules will be:

When electric current is supplied through an ionic hydride in its fused state,then:

Which of the following acids possesses oxidising,reducing,and complex-forming properties?

If the boiling point of $H_{2}O$ is $373\,K$,the boiling point of $H_{2}S$ will be: