The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is

Metals generally react with dilute acids to produce hydrogen gas. Which of the following metals does not react with dilute hydrochloric acid?

Which of the following reacts with cold water vigorously?

Which of the following non-metals reacts and catches fire on exposure to air?

Genearlly metallic oxides are baisc and non-metallic oxides are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red?