Here are 10 One-Word Answer Type Questions from the topic Crystallisation (from your provided PDF), with answers and explanations after each question as requested:
One-Word Answer Type Questions
Topic: Crystallisation
1. Question: What is the process of obtaining crystals from a solution called?
• Answer: Crystallisation
• Explanation: Crystallisation is the process used to obtain pure crystals from their solution.
2. Question: What type of change is crystallisation?
• Answer: Physical
• Explanation: Crystallisation is considered a physical change because no new substance is formed.
3. Question: What solid substance is commonly used in crystallisation experiments?
• Answer: Salt
• Explanation: Salt is dissolved in water and crystals are obtained by crystallisation.
4. Question: What is the first step in crystallisation?
• Answer: Dissolving
• Explanation: The first step is dissolving the solid substance in water to form a solution.
5. Question: What is the process of removing water from the solution in crystallisation?
• Answer: Evaporation
• Explanation: Evaporation is used to remove water and allow crystals to form.
6. Question: What is formed after evaporation of the solution in crystallisation?
• Answer: Crystals
• Explanation: Pure, solid crystals are formed after evaporation.
7. Question: What is the shape of substances obtained after crystallisation?
• Answer: Definite
• Explanation: Crystals have a definite and regular shape.
8. Question: What is the process of heating a solution until water evaporates called?
• Answer: Heating
• Explanation: Heating helps to evaporate water and speed up crystallisation.
9. Question: What is added to water to make a saturated solution during crystallisation?
• Answer: Solute
• Explanation: Solute like salt or sugar is added to water to make a saturated solution.
10. Question: What is the process of cooling the hot, concentrated solution called in crystallisation?
• Answer: Cooling
• Explanation: Cooling the concentrated solution helps in the formation of crystals.
If you want, I can now prepare the next set from the chapter Soil in the same one-word format.
Shall I proceed?
