Which of the following elements reacts with water?

Which among the following does not undergo hydrolysis?

The correct order of acidic character of the following is:

The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride $(PCl_3)$ and phosphonic acid $(H_3PO_3)$ is

Of the following acids, the one which has the capability to form complex compounds and also possesses both oxidizing and reducing properties is:

Give the preparation of carbon monoxide. Explain the properties of carbon monoxide and give its uses.