Class 9th Chemistry Chapter 8


Total Marks: 29

1. Which one is non-metal:
K Na H Li
2. Which one of the following non metal is lustrous ?
Sulphur Phosphorus Iodine Carbon
3. Which non-metal is extremely hard?
Sulphur Phosphorus Iodine Carbon
4. The most reactive non metal is :
F Cl Br I
5. Which halogen exist in liquid form ?
Flourine Chlorine Bromine Iodine
6. Which halogen has lowest electronegativity ?
Fluorine Chlorine Bromine Iodine
7. What is the Electronegativity of Bromine ?
4.0 3.2 2.7 2.8
8. Which element has highest electronegativity?
F B O Cl
9. What is the color of fluorine?
Light yellow Greenish yellow Reddish brown purple black
10. The difference between the electronegativity of hydrogen and chlorine is:
0.9 2 3 4
11. The halogen which exists as solid at room temperature is ?
Chlorine Bromine Florin Iodine
12. Percentage of oxygen in the atmosphere?
21 22 23 24
13. The most reactive metal is ?
Sodium zinc copper gold
14. Metals froms ion carring which charge :
Aluminium Sodium Selenium Magnesium
15. Which metals floats on water ?
Calcium Magnesium Sodium Potassium
16. The most abundant metal is :
alumenium gold silver platinium
17. Which metal is not affected by mineral acids and alkalis ?
Fe Zn Au Na
18. The colour of flame of sodium in air is :
golden yellow brilliant white red brick red
19. One gram of which metal can be drawn wire of one and half kilometer long ?
silver gold iron calcium
20. The most precious metal is :
iron platinum silver aluminum
21. Which one of the following will not react with dilute HCl?
Sodium Potassium Calcium Carbon
22. The density of gold is:
4.88 g/mc3 19.3g/mc3 2.86g/mc3 2.70g/mc3
23. Non-metals are generally soft, but which one of the following is extremely hard?
Graphite Phosphorus Iodine Diamond
24. Which one of the following is brittle?
Selenium Aluminium Sodium Magnesium
25. Which one of the following non-metals is lustrous?
Phosphorus Iodine Sulphur Carbon
26. Metals lose their electrons easily because
They are electronegative They are electropositive They have electron affinity Good conductors of heat
27. Which of the following is less malleable?
Sodium Iron Gold Silver
28. Sodium is extremely reactive metal, but it does not react with
Hydrogen Nitrogen Sulphur Phosphorus
29. Which one of the following metals burn with a brick red flame?
Sodium Magnesium Iron Calcium