Shadows - Answer is 1 (Both will produce a bigger shadow)
Q19 - Answer is 3 (Blood does not carry digested food - carries Oxygen, Carbon-dioxide & some waste materials)
Q23 - Answer is 3 (at 110°C)
@45°C - P is solid & QRS are liquid
@70°C - PQR are liquid & S is gas
@110°C - PQ are liquid & RS are gas
@130°C - P is liquid & QRS are gas
Therefore, @ 110°C two of the substances (PQ out of PQRS) will be liquid.
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