MCQ
The metal which is liquid at room temperature is
- Asodium
- Bbromine
- Ccalcium
- ✓mercury
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Column $I$
$($Position of the object$)$
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Column $II$
$($Position of the image$)$
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Column $III$
$($Type of Image$)$
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$(a)$
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Object beyond $2F$
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$(i)$
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At $2F$
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$(p)$
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Real, inverted, large
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$(b)$
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Object at $2F$
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$(ii)$
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Same side as the object
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$(q)$
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Virtual, erect, magnified
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$(c)$
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Object between $F$ and $2F$
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$(iii)$
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Beyond $2F$
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$(r)$
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Real, inverted, same size
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$(d)$
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Object within the focal length
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$(iv)$
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Between $F$ and $2F$
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$(s)$
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Real, inverted, diminished
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Column I
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Column II
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$P.$
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A synthetic fibre also called as artificial silk
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$(i)$
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Spandex
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$Q.$
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A synthetic fibre also known as lycra
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$(ii)$
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Acrylic
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$R.$
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A synthetic fibre that closely resembles wool
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$(iii)$
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Rayon
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$S.$
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The first true synthetic fibre
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$(iv)$
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Nylon
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