Chapter-4 (Materials: Metals
and Non-metals)
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M C Q
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Fill in the blanks:-
1.……………………….
Is an exception of non-metals with high tensile strength.
2.Iron when red hot reacts with
steam to form an …………………. And ………..
3.Metals
react with dilute acids to form metal …………… and ………………….
4.………………………
is the only non-metal to occur as ‘liquid’.
5.…………….
And …………… are exceptions of non-metals with some degree of luster.
6.…………….
Is a metal that is highly ductile.
7.…………………..
and ………………… are non-ductile metals.
8.Metals
react with oxygen in air to form their corresponding oxides called ……………..
9.…………………..
metal has a very low melting point and melts on the plam of the hand.
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Very short
questions:
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1 marks
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1.What is metallurgy?
2.What
are ores?
3.Define
elements?
4.What
is an alloy
5.Define
oxide
6.write
the name of metal which is found in liquid state at room temp.
7.what is rust
chemically known.
8.what
is the nature of non metallic oxide.
9.what is the nature metallic oxide.
10.Name two metals which
can cut with knife.
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Short answer
questions:
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(2)marks
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1.How do metals differ
from non-metals in terms of:
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i) physical state
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ii) conductivity
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iii) Lustre
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iv) Malleability and ductility
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2.Why are sodium and
potassium stored under oil?
3. List three uses of non-metals.
4.List three uses of
metals?
5.What are metalloids? Give
two examples.
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Answer these
questions:
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3 marks
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1.What is aqua regia?explain with
example.
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2.What are displacement reactions?
Give one example
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3.What happens when iron reacts with
air?
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4.What happens when metals react with
dilute acids?
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5.What happens when sodium reacts
with water?
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Long answer
questions.
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(5)marks
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1.Differentiate between
oxides of metals and oxides of non-metals giving example.
2.What
is meant by ‘Reactivity Series of Metals’? Explain.
3.What
is ‘displacement reaction? Give an example.
4.Why
should foodstuffs like chutney, pickles and curd not be stored on containers
made of metals?
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