MCQs 1 on MATTER IN OUR SURROUNDINGS) => 9th Class

solve online MCQs on Chemistry(MATTER IN OUR SURROUNDINGS) => 9th Class for competitve examinations like CBSE Neet, CBSE Board, CSIR NET, GRE etc.

1. As solid melts to form liquid:

• Inter particle distance increases
• Inter molecular forces of attraction decreases
• Compressibility increases
• All of the above

2. Which of the following is not characteristic of solid:

• High Rigidity
• Regular Shape
• High density
• High compressibility

3. The boiling point of water is:

• 101^oC at atmospheric pressure
• 273 K at atmospheric pressure
• 0^oC at atmospheric pressure
• 0 K at atmospheric pressure

4. Which of the following has highest intermolecular forces of attraction?

• Water at room temperature
• CO2 gas
• Ethyl alcohol
• Iron metal

5. Which of the following substances will undergo sublimation?

• Common salt
• Odonil
• Sugar
• Sand

6. The process of evaporation causes:

• Cooling
• Heating
• Dryness
• None of the above

7. The conversion of solid to gas directly is called:

• Evaporation
• Sublimation
• Distillation
• condensation

8. Evaporation of a liquid can take place:

• At its boiling point
• At all temperatures
• At its freezing point
• At a fixed temperature

9. Which of the following describes a liquid state:

• Definite volume and definite shape
• Definite volume and no specific shape
• definite shape but no definite volume
• neither definite shape nor definite volume

10. Wet clothes are kept for drying. Which of the following does not help them in drying:

• Spreading it out
• Blowing wind over it
• Making the room a little warmer
• Cooling the room

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