Multiple Choice Question Answer XVIII — task. Science CBSE, Class 9.

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1. The element, compound and mixture in the given list is: cobalt, ink, milk, marble, ozone

Cobalt is an element, milk is a mixture, ink, marble and ozone are compounds
Cobalt is an element, marble and milk are mixtures, ink and ozone are compounds
Cobalt and ozone are elements, ink is a mixture, marble and milk are compounds
Cobalt is an element, ink and milk are mixtures, ozone and marble are compounds

2. A mixture of sulphur dioxide (BP is 10°C) and oxygen (BP is -183 °C) can be separated economically by

Reacting one of the gases
Cooling to BP of \(SO_2\)
Absorbing the gases
Cooling to BP of oxygen

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