1. [D] Gives a squeaky Pop with a lit splint Always Remember, hydrogen gas is recognised by pop sound.

    [D] Gives a squeaky Pop with a lit splint
    Always Remember, hydrogen gas is recognised by pop sound.

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  2. [C] 1/f = 1/v – 1/u The correct lens formula is: 1/v – 1/u = 1/f

    [C] 1/f = 1/v – 1/u
    The correct lens formula is:
    1/v – 1/u = 1/f

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  3. (b) Transpiration is very low and absorption is very high You must know that – transpiration process is very low, At night, when there is no sunlight, but the absorption of substances by roots remains high.

    (b) Transpiration is very low and absorption is very high
    You must know that – transpiration process is very low, At night, when there is no sunlight, but the absorption of substances by roots remains high.

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