Rajesh Singh, Indu Gupta and, Sikha Sharma Solutions for Chapter: Metals and Non-Metals, Exercise 1: Multiple Choice Questions (MCQs)

$2 \mathrm{mL}$ each of $\mathrm{conc}.\mathrm{HCl}, {\mathrm{HNO}}_3$ and a mixture of $\mathrm{conc}.\mathrm{HCl}$ and $\mathrm{conc}.{\mathrm{HNO}}_3$ in the ratio of $3:1$ were taken in test tubes labelled as $\mathrm{A}$, $\mathrm{B}$, and $\mathrm{C}$. A small piece of metal was put in each test tube. No change occurred in test tubes $\mathrm{A}$ and $\mathrm{B}$ but the metal got dissolved in the test tube $\mathrm{C}$. The metal could be

The electronic configurations of three elements $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ are $\mathrm{X}-2 , 8 ; \mathrm{Y}-2 , 8, 7$ and $\mathrm{Z}-2 , 8, 2$. Which of the following is correct?

Although metals form basic oxides, which of the following metals form an amphoteric oxide?

Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

Electrical wires have a coating of an insulating material. The material, generally used is

Which of the following non-metals is a liquid?

Which of the following can undergo a chemical reaction?

Which one of the following figures correctly describes the process of electrolytic refining?