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Consider the following statements about the particles of matter:
1. The force of attraction between particles is maximum in solids.
2. The kinetic energy of particles is maximum in liquids.
3. The space between particles is maximum in gases.
Which of the statements given above is/are correct?
Match List-I with List-II:
| List-I (Mixture to be separated) | List-II (Technique) |
|---|---|
| A. Butter from cream | 1. Chromatography |
| B. Oil and water | 2. Centrifugation |
| C. Dyes in ink | 3. Fractional distillation |
| D. Gases of air | 4. Separating funnel |
Select the correct answer using the codes given below.
Consider the following statements about evaporation and boiling:
1. Evaporation is a surface phenomenon that takes place below the boiling point.
2. Boiling is a bulk phenomenon.
3. An increase in humidity increases the rate of evaporation.
Which of the statements given above is/are correct?
Consider the following statements about temperature scales:
1. The SI unit of temperature is kelvin.
2. 0 °C is about 273 K.
3. 50 °C is about 223 K.
Which of the statements given above is/are correct?
Match List-I with List-II:
| List-I (Process) | List-II (Change of state) |
|---|---|
| A. Fusion | 1. Gas directly to solid |
| B. Sublimation | 2. Gas to liquid |
| C. Deposition | 3. Solid to liquid |
| D. Condensation | 4. Solid directly to gas |
Select the correct answer using the codes given below.
Consider the following statements about mixtures:
1. Milk is a true solution.
2. Alloys are solid solutions, and air is a gaseous solution.
3. In a suspension, the particles are visible and settle down.
Which of the statements given above is/are correct?
Which one of the following pairs is correctly matched?
Consider the following statements:
1. Latent heat is the heat that does not raise the temperature during a change of state.
2. Latent heat of fusion refers to the change from liquid to gas.
3. Water in an earthen pot stays cool because evaporation causes cooling.
Which of the statements given above is/are correct?
Consider the following statements about sublimation:
1. Camphor changes directly from solid to gas.
2. Ammonium chloride changes directly from solid to gas.
3. In sublimation, a substance first becomes a liquid and then a gas.
Which of the statements given above is/are correct?
Consider the following statements about the rate of evaporation:
1. It increases when the surface area increases.
2. It increases when the wind speed increases.
3. It decreases when the temperature rises.
Which of the statements given above is/are correct?
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