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

11. The property of substance to undergo chemical reaction with any material is called:
(a) electrochemistry

(b) chemical reactivity ✔
(c) chemical bonding
(d) chemical equilibrium

12. Reactivity of metals depends upon its tendency to:
(a) lose electron ✔
(b) accept electron
(c) lose proton
(d) accept proton

13. Reactivity of non-metals depends upon its tendency to:
(a) lose electron
(b) accept electron ✔
(c) lose proton
(d) accept proton

14. The most abundant element found in air is:
(a) oxygen
(b) argon
(c) hydrogen
(d) nitrogen ✔

15. Most abundant elements found in earth's crust are:
(a) Silicon, Aluminium, Oxygen
(c) Oxygen, Silicon, Aluminium
(b) Oxygen, Aluminium, Silicon ✔
(d) Silicon, Aluminium, Oxygen

16. The most abundant element found in the universe is:
(a) helium
(b) hydrogen ✔
(c) oxygen
(d) carbon

17. Most abundant elements found in human body are:
(a) Oxygen, Carbon, Hydrogen ✔
(c) Carbon, Hydrogen, Oxygen
(c) Carbon, Oxygen, Hydrogen
(d) Oxygen, Hydrogen, Carbon

18. The element which readily loses electron and easily form cation is termed as:
(a) non-metal
(b) metal ✔
(c) gas
(d) liquid

19.  All B group elements are metals and known as:
(a) alkali metals
(b) alkaline earth metals

(c) transition metals ✔
(d) rare metals

20. Elements of group IA are called:
(a) alkali metals ✔
(b) alkaline earth metals
(c) transition metals
(d) rare metals

21. Elements of group IIA are called:
(a) alkali metals
(b) alkaline earth metals ✔
(c) transition metals
(d) rare metals

22. It is a light, strong and highly toxic metal.
(a) Bi
(b) Be ✔
(c) Ba
(d) Br

23. The most abundant metal is:
(a) iron
(b) gold
(c) copper
(d) aluminum ✔

24. The most reactive metal is:
(a) Fe
(b) Al
(c) Cs ✔
(d) Li

25. The lightest metal is:
(a) Al
(b) Cs
(c) Os
(d) Li ✔

26. The heaviest metal is:
(a) Al
(b) Cs
(c) Os ✔
(d) Li

27. Due to this property metals easily lose their valence shell electrons.
(a) Electro positivity ✔
(b) Electronegativity
(c) Electron affinity
(d) Ionization energy

28. Positively charged ion is known as:
(a) cathode
(b) anode
(c) cation ✔
(d) anion

29. Electropositive character of metals:
(a) decreases down the group

(b) increases down the group ✔
(c) decreases up the group
(d) None of these

30. They have large atomic size and low ionization potential values:
(a) Alkali metals ✔
(c) Transition metals
(b) Alkaline earth metals
(d) Non-metals

31. The valence shell electronic configuration of alkali metals is:
(a) ns¹ ✔
(b) np¹
(c) ns²
(d) np²

32. Alkali earth metals form:
(a) monovalent anion
(c) monovalent cation
(b) divalent anion ✔
(d) divalent cation

33. The valence shell electronic configuration of alkaline earth metals is:
(a) ns¹
(b) np¹
(c) ns² ✔
(d) np²

34. The removal of electron from an element requires energy which is known as:
(a) Electro positivity
(b) Electronegativity
(c) Electron affinity
(d) Ionization energy ✔

35. With increasing atomic size, ionization energy values:
(a) increases
(b) decreases ✔
(c) remains the same
(d) becomes zero

36. It is sixth most abundant element and constitutes 2.87% of earth's crust.
(a) Sodium ✔
(b) Silicon
(c) Carbon
(d) Hydrogen

37. It is silvery white alkali metal which is so soft that it can be cut with knife.
(a) Lithium
(b) Cesium
(c) Sodium ✔
(d) Barium

38. Chemical formula of baking soda is:
(a) Na₂CO₃
(b) NaNO₃
(c) NaCl
(d) NaHCO₃ ✔

39. It is 8^th most abundant element found in earth's crust.
(a) Sodium
(b) Magnesium ✔
(c) Carbon
(d) Calcium

40. Magnesium belongs to:
(a) I A group
(b) II A group ✔
(c) III A group
(d) IV A group

41. It is used in flares and photographic flash bulbs.
(a) Magnesium ✔
(b) Sodium
(c) Calcium
(d) Iridium

42. It is 5^th abundant metal in earth's crust. It belongs to IIA group and 4^th period.
(a) Magnesium
(b) Sodium
(c) Calcium ✔
(d) Lithium

43. It is essential for healthy teeth and bones.
(a) Sodium
(b) Magnesium
(c) Potassium
(d) Calcium ✔

44. Chemical formula of gypsum is:
(a) Ca(OH)₂
(b) 2CaSO₄.H₂O ✔
(c) CaOCl₂
(d) CaCO₃

45. CaCO₃ is the chemical formula of:
(a) slaked lime
(b) calcium tungstate
(c) Soda ash
(d) Limestone ✔

46. Noble metals are difficult to oxidize because they are:
(a) less electropositive ✔
(b) more electropositive
(c) less electronegative
(d) more electronegative

47. It is the only metal found in a liquid state.
(a) Platinum
(b) Osmium
(c) Mercury ✔
(d) Palladium

48. Which of the following forms alloys with other metals which are known as amalgam?
(a) Platinum
(b) Mercury ✔
(c) Sodium
(d) Silver

49. The only non-metal found in liquid state is:
(a) Xenon
(b) Selenium
(c) Mercury 
(d) Bromine ✔

50. Halogen belongs to group:
(a) VA
(b) VIA
(c) VII A ✔
(d) VIII A

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