MCQ
Hot air ballon rises up in the air because?
- AHot air does not play any role in rising up the ballon.
- BHot air contains water vapour which push up the ballon.
- CHot air is heavier than cold air.
- ✓Hot air is lighter than cold air.
✓
Answer
Correct option: D.
Hot air is lighter than cold air.
Hot air is lighter than cold air.
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DIRECTION: Match Column$-I$ with Column$-II$ and select the correct answer using the code given below the columns.
|
S.No.
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Column-$I$ (Objects)
|
S.No.
|
Column-$II$ (Property)
|
|
$A.$
|
Coconut oil.
|
$(p)$
|
Float on surface of water.
|
|
$B.$
|
Vinegar.
|
$(q)$
|
Sink in water.
|
|
$C.$
|
Dry leaves.
|
$(r)$
|
Miscible in water.
|
|
$D.$
|
Glass marbles.
|
$(s)$
|
Immiscible in water.
|
Directions: Match Column$-I$ with Column$-II$ and select the correct answer using the codes given below the columns.
→|
S.No.
|
Column - $I$
|
S.No.
|
Column - $II$
|
|
$A.$
|
Multiple lengthwise yarn in a loom.
|
$(p)$
|
Ginning
|
|
$B.$
|
Separation of cotton fibres from its seeds.
|
$(q)$
|
Warp
|
|
$C.$
|
Compression of raw cotton fibres into bundles.
|
$(r)$
|
Spinning
|
|
$D.$
|
Making yam from fibres $(s)$ Bailing.
|
$(s)$
|
Bailing
|
DIRECTIONS: Read the passage(s) given below and answer the questions that follow Passage $-$ If you collect the garbage from your home and put it in separate pits covered with soil for a few days. You will find that something in the garbage rots. They form manure which is used for plants. Which of the following observations was the correct reporting about all the pits after $4$ days when the soil was removed?
→Cutting a metal sticks into small pieces is which one of the following kind of change?