Question

{ Coconut oil,spirit,water,petrol, ammonium chloride, alcohol,camphor,sodium,ghee,naphthalene balls, potassium,iodine,sanitizer }
1. Which substances from above freeze in winter?
2. Which substances from above are in liquid state?
3. Which liquid have you seen change into vapour?
4. Which solid directly change into the gaseous state?​

Answer 1

Answer:

1a coconut oil,water,spirit,ghee

2a coconut oil, spirit,Water,petrol alcohol,sanitiser

3a water,spirit,sanitizer

4a potassium,iodine,ammonium chloride

Answer 2

Answer:

1.substances freeze in winter- water, alcohol, ghee, coconut oil. 2. substances in liquid state-water, petrol, spirit, sanitizer, alcohol,  3. liquid change into vapour- petrol 4.solid that directly change into the gaseous state- camphor, naphthalene balls, ammonium chloride

Explanation:

1. substances which freeze in winter are alcohol, ghee, water, coconut oil.

Pure water freezes at 0°. Coconut oil freezes in winters because it has low melting point of around 24°c. Alcohol does freeze, its freezing point is simply far below that of water.

2. Substances in liquid state are water, spirit, petrol, sanitizer and alcohol.

3. liquid which change into vapour is petrol.

petrol, or gasoline, evaporates faster than most liquids because of its weak intermolecular attractions.

4. solid that directly change into the gaseous state are camphor, ammonium chloride , naphthalene balls.

because camphor is a sublime substance and sublime substances are those which are converted into gas from solid when heated .

naphthalene is a solid that sublimes at standard atmospheric  temperature with the sublimation point at around 80°c or 176°F.

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