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

Which of the following is used for vulcanization purposes in the rubber industry?

The acidic strength of HClO4 is lesser than HClO.

Which of the following is a property of phosphine?

Which of the following halogen exists as a solid at room temperature?

Phosphine like ammonia has very high affinity for water.

Which of the following is true regarding nitric acid?

What is the maximum covalency of the nitrogen atom?