METALS AND NON METALS

1.Which one of the following metals does not react with cold as well as hot water?

• Na

• Ca

• Mg

• Fe

2. 2. Generally, metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals except Mn and Mg?

• H2SO4

• HCL

• HNO3

• ALL OF THESE

3. 3. Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?

4. (i)Au (ii) Cu (iii) Na (iv) K

• (i) and (ii)

• (i) and (iii)

• (ii) and (iii)

• (iii) and (iv)

4. 4. Generally non metals are non lustrous. Which of the following non metal is lustrous?

• Sulphur

• Oxygen

• Nitrogen

• Iodine

5. 5.An electrolytic cell consists of-

6. (i) positively charged cathode (ii) negatively charged anode

7. (iii) positively charged anode (iv) negatively charged cathode

• (i) and (ii)

• (iii) and (iv)

• (i) and (iii)

• (ii) and (iv)

6. 6. Reaction between X and Y, forms compound Z. X loses electron and Y gains electrons. Which of the following properties is not shown by Z?

• Has a high melting point

• Has a low melting point

• Conducts electricity in molten state

• occurs as solid

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

• Diamond

• Graphite

• Sulphur

• Hydrogen

8. 8.Although metals form basic oxides, which of the following metals form amphoteric oxides?

• Na

• Ca

• Al

• Cu

9. 9. The electronic configuration of three elements X, Y and Z are X-2,8; Y-2,8,7 and Z-2,8,2. Which of the following is correct?

• X is a metal

• Y is a metal

• Z is a non metal

• Y is a non metal and Z is a metal

10. 10. An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following-

• Mg

• Na

• P

• Ca