Question
Explain briefly carbon dioxide gas and its properties.
✓
Answer
Carbon dioxide is a colourless and odourless gas. It is soluble in water. It neither burns nor supports burning. $Co2$ extinguishes a burning fire. Plants and animals consume oxygen for respiration and produce $Co2$ which is necessary for photosynthesis. It is an important greenhouse gas.
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Match the following items given in Column $A$ with that in Column $B$:
|
S.No.
|
Column $A$
|
S.No.
|
Column $B$
|
|
$(a)$
|
Jute is obtained from.
|
$(i)$
|
Charkha.
|
|
$(b)$
|
Fibre from retted jute are extracted by.
|
$(ii)$
|
Sliver.
|
|
$(c)$
|
Separation of fibres from jute stem.
|
$(iii)$
|
Bales.
|
|
$(d)$
|
Compressed bundles of cotton.
|
$(iv)$
|
Retting.
|
|
$(e)$
|
Cotton is collected from cotton plants by.
|
$(v)$
|
Hand picking.
|
|
$(f)$
|
Separation of cotton from seeds.
|
$(vi)$
|
Silk and wool.
|
|
$(g)$
|
Loose rope of cotton fibres.
|
$(vii)$
|
Stem of‘putson.
|
|
$(h)$
|
Animal fibres.
|
$(viii)$
|
Hands with jerks and pulls.
|
|
$(i)$
|
Suitable for wearing in kitchen.
|
$(ix)$
|
Ginning.
|
|
$(j)$
|
Used to spin yams.
|
$(x)$
|
Cotton clothes.
|
Match the parts of plant given in Column $I$ with their function in Column $II$:
→|
Serial Number
|
Column $I$
|
Serial Number
|
Column $II$
|
|
$A.$
|
Flower
|
$i.$
|
Excretion
|
|
$B.$
|
Leaf
|
$ii.$
|
Photosynthesis
|
|
$C.$
|
Stem
|
$iii.$
|
Reproduction
|
|
$D.$
|
Root
|
$iv.$
|
Bears branches
|
|
$E.$
|
|
$v$
|
Anchorage
|
Explain the difference between taproots and fibrous roots with the help of diagrams.
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What are $3R’s$? How should we adopt them? Explain.
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