Chemistry For Class IX (New Book ) - Chapter No. 8- Chemical Reactivity - Multiple Choice Questions And Fill In The Blanks

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Chapter No.8-Chemical Reactivity
Multiple Choice Questions, Fill In The Blanks And Concept Map

SECTION- A: MULTIPLE CHOICE QUESTIONS

Tick Mark (✓) the correct answer
1. Which one metal belongs to Alkaline earth metal?
(a) B
(b) Bi
(c) Br
(d) Ba ✓

2. Which one is Barium:
(a) Bi
(b) Be
(c) Ba ✓
(d) Br

3. Chlorine can be displaced by _____.
(a) F ✓
(b) Br
(c) I
(d) At

4. Which one is strong acid?
(a) HF
(b) HCl
(c) HBr
(d) HI ✓

5. Which Halogen exists in liquid state?
(a) F₂
(b) CI₂
(c) Br₂ ✓
(d) I₂

6. Non-metals of ____ group are gases.
(a) VI-A
(b) VII-A
(c) VIII-A ✓
(d) VIII-B

7. Which one is Metalloid?
(a) Br
(b) Se
(c) S
(d) Sr
(Note: Non of the above is metalloid. Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), Polonium (Po) and Astatine (At) are metalloids.

8. Which one of the following act as oxidizing agent?
(a) Be
(b) Mg
(c) Na
(d) Cl ✓

9. Which gas can turn lime water milky?
(a) O₂
(b) NO₂
(c) CO₂ ✓
(d) N₂

10. Which compound is known as lunar caustic?
(a) KNO₃
(b) AgNO₃ ✓
(c) NaOH
(d) NaNO₃

FILL IN THE BLANKS:

1. Metals have greater tendency to lose electron.
2. Non-metals have greater tendency to accept electron.
3. The property of substance to undergo chemical reaction with any material is called chemical reactivity.
4. Oxides of metals are basic. 
5. Oxides of metals produce basic solution with water.
6. Oxides of Non-metals are Acidic. 
7. Oxides of Non-metals form Acidic solution with water.
8. Ionization Energy decreases down the group.
9. Electro positivity increases down the group.
10. Group I-A elements are called Alkali Metals.
11. Group II-A elements are called Alkaline earth metals.
12. Metals of Group I-A, II-A are powerful reducing agents.
13. Noble metals like Platinum, Silver, Gold etc are difficult to oxidize.
14. VII-A group elements are Non-metals and act as oxidizing agents.
15. VII-A group elements are known as Halogens.
16. Halogen reacts with metals and form salt.
17. Elements of group VIIIA are non-metals and consist of gases.
18. Metalloids are elements which have properties intermediate between metals and Non-Metal elements.
19. B, Si, Ge, As, Sb, Te are metalloids.
20. Beryllium (Be) is a light strong and highly toxic metal.
21. Beryllium small grain of 0.25 mg can kill a rat.
22. Most abundant metal is aluminum (Al).
23. Most useable metal is iron (Fe).
24. Most reactive metal is cesium (Cs).
25. The lightest metal is lithium (Li).
26. The heaviest metal is osmium (Os).
27. Most malleable, ductile metals are gold (Au) and silver (Ag).
28. Mercury (Hg) is the only metal found in liquid state.
29. Tin amalgam is an alloy of tin and mercury.
30. Bromine (Br) is the only non-metal found in liquid state.
31. Fluorine gas is a yellow color nonmetal.
32. Chlorine gas is a green non-metal.
33. Iodine is a lustrous purple color nonmetal.
34. Diamond is hardest non-metal.

Common compounds with their chemical names and formulas

Common Name	Chemical name	Formula
Soda Ash	Sodium carbonate	Na2CO3
Baking Soda	Sodium bicarbonate	NaHCO3
Table Salt	Sodium chloride	NaCl
Chile saltpeter	Sodium Nitrate	NaNO3
Slaked lime	Calcium hydroxide	Ca(OH)2
Gypsum	calcium sulphate dihydrate	2CaSO4.H2O
Bleaching powder	Calcium hypochlorite	Ca(OCl)2
Limestone	Calcium carbonate	CaCO3
Lime	Calcium oxide	CaO
Lunar caustic	Silver Nitrate	AgNO3
Dry ice	Solid Carbon dioxide	CO2 (s)
Aurum	Gold	Au
Argentum	Silver	Ag

CONCEPT MAP