1. The non-metal which is liquid at room temperature is:

2. The number of protons in an atom of an element A is 19 then, the number of electron in its ion A+ is

3. An element X is soft and can be cut with the help of a knife. It is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following:

4. Which of the following alloys contains a non-metal as one of its constituents?

5. Galvanization is a method of protecting steel and iron from rusting by coating  them with a thin layer of

6. Which of the following pairs of reactants will go undergo a displacement reaction?

7. Which among the following is the most abundant metal found in the earth’s crust?

8. Which of the following pairs will give displacement reactions?

9.  An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be

10. Which of the following represent the correct order of decreasing reactivity?

11.  Generally, Non-Metals Are Not Lustrous. Which Of The Following Non-Metal Is Lustrous?

12.  The Composition Of Aqua-Regia Is

13.  The Ability Of Metals To Be Drawn Into Thin Wire Is Known As:

14. Pick the statement which is correct about the non-metal:

15. When a non-metal is allowed to react with water

16. The metals that float when treated with water are:

17. Which of the following oxides of iron would be obtained on prolonged reaction of iron with steam?

18. Bauxite is an ore of

19. An electrolytic cell consists of ; (i) positively charged cathode (ii) negatively charged anode (iii) positively charged anode (iv) negatively charged cathode

20. Which of the following ore is concentrated by Froth floatation process ?