Chemistry class ix notes 9th class board pattern model paper
Chap-8 Chemical Reactivity Important questions, if you attempt these question you will get InshaAllah 100% marks.
Chap-8 Chemical Reactivity
Objective
Part
Choose the right option. 10×1=10
|
|
|
A
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B
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C
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D
|
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1
|
Metals can form ions carrying
charges:
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Unipositive
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Dipositive
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Tripositive
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All of them
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2
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Which of the is less malleable:
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Sodium
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Iron
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Gold
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Silver
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3
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Which one of the following
non-metal is lustrous:
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Sulphur
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Phosphorous
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Iodine
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Carbon
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4
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The highest electronegative
element in periodic table is:
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Fluorine
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Chlorine
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Bromine
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Iodine
|
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5
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Non-metals are essential:
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For the maintenance
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For the existence
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For the safety of
life
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All of them
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6
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Non-metals are electronegative in
nature and form ___ oxides.
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Acidic
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Basic
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Neutral
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None of these
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7
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______ and gold exist in free
elemental form in nature.
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Silver
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Sodium
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Mercury
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Platinum
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8
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Zinc, iron and tin are ______
elements.
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Very reactive
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Moderately reactive
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Least reactive
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Non reactive
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9
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Which one of the following is
brittle?
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Sodium
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Aluminium
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Selenium
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Magnesium
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|
10
|
Metals which are easily oxidized
are said:
|
Negative metals
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State metals
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Reactive metals
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Non-reactive metals
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Subjective
Answer the short
questions.
10×2=20
1. Why
the second ionization energy of magnesium is higher than the first one?
2. Why
copper is used for making electrical wires?
3. Why
ionization energy of Na is less than Mg?
4. Write
down some properties of gold.
5. Why
platinum is used for making jewelry?
6. Why
is HF a weak acid?
7. What
is difference between metals and non-metals?
8. How
oxygen reacts with group II A metals?
9. What
is relationship between electropositivity and ionization energy?
10. What
do you mean by 24 carat gold?
Long Questions 5×1=5
1. (a)
Write a note on the significance of non-metals.
2.5
(b) Compare
and contrast the properties of alkali and alkaline earth metals. 2.5
Available all
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