Chapter 3-5 Student Chemistry Worksheet - Class X, Central Board Of Secondary Education Page 4
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30Chapter 3 - Metals and Non-Metals
Formative Assessment Manual for Teachers
13. Zinc replaces copper from _ X __ solution because it is __ Y ___than copper. Substitute
X and Y with correct option.
X
Y
a
Zinc sulphate
Less reactive
b
Copper sulphate
more reactive
c
sulphuric acid
more reactive
d
Copper sulphate
Less reactive
14. Most metallic oxides are-
a.
Acidic is nature
b.
Neutral in nature
c.
Basic in nature
d.
Amphoteric in nature
15.
___ X ___is used for decorating sweets because it is_ Y ___ in nature? Substitute X and
Y with correct choice.
X
Y
a
Silver foil
Ductile
b
Copper foil
Malleable
c
Aluminium foil
Ductile
d
Silver foil
Malleable
Suggested Remediation:
●
Some students may find it difficult to remember difference between ductility and
malleability Spending time on Q.13 and 15 will help remove this difficulty. More over
some mnemonic may be given to the students eg. Drawn into wires-Ductility.
●
Some students may find it difficult to comprehend the difference between the sentences-
’all metals —’ and ‘generally most metals have the property— teacher should help
them in understanding the difference.
●
This worksheet should be able to help diagnose any difficulties in the understanding of
the concepts of physical and chemical properties of metals and non-metals.
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