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TEST

matter in our surroundings

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1) Convert 37 K into °C

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2) Convert 37 °C into K

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3) What is the physical state of water at 100˚C?

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4) What is the physical state of water at 0˚C?

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5) Suggest two methods to liquefy gasses.

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6) If temperature is increased then kinetic energy will ____.

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7) Latent heat is the amount of heat required to change the state of ____ substance without ____.

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8) _____ is the heat required to convert unit mass of a substance from the solid state to the

liquid state without change in temperature.

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9) Name the factors on which rate of evaporation depends.

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10) How does rate of evaporation depends on humidity?

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11) What is the chemical formula of acetone?

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12) Boiling is ____ phenomenon where as evaporation is ____ phenomenon .

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13) Name the state of matter that is a mixture of free electrons and ions and is responsible for the

glow or shine

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14) What are the three most common units of temperature?

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15) At what temperature does Fahrenheit and Celsius scale thermometer give the same reading?

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16) At what temperature does kelvin and Celsius scale thermometer give the same reading?

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17) Which of solid, liquid or gas shows highest and the lowest expansion at the same temperature?

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18) Tarun found that his shirt wet. What step he would take to dry them quickly?

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19) Give reason:

We can get smell of perfume sitting several metres away.

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20) Give reason:

Steam is more effective than boiling water at the same temperature.

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21) Name the states of matter at

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22)