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9th CBSE
IMPORTANT
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Which of the following represents the suitable condition for the liquefaction of gases?

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Important Questions on Matter in Our Surroundings

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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Multiple Choice Questions (MCQs)>Q 73
During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of:
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Multiple Choice Questions (MCQs)>Q 74
On converting 25 °C, 38 °C and 66 °C to the Kelvin scale, the correct sequence of temperatures will be:
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Multiple Choice Questions (MCQs)>Q 75
The conversion of a solid into vapours without passing through the liquid state is called:
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Multiple Choice Questions (MCQs)>Q 76
The evaporation of water increases under the following conditions:
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Multiple Choice Questions (MCQs)>Q 77
On converting 308K, 329K and 391K to Celsius scale, the correct sequence of temperatures will be:
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Multiple Choice Questions (MCQs)>Q 78
Which of the following energy is absorbed during the change of state of a substance?
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Multiple Choice Questions (MCQs)>Q 79
Which of the following factors are responsible for the change in the state of solid carbon dioxide when kept exposed to air? 
(i) increase in pressure
(ii) increase in temperature
(iii) decrease in pressure
(iv) decrease in temperature
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9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Multiple Choice Questions (MCQs)>Q 80
During respiration, glucose and oxygen enter our body cells and waste products, carbon dioxide and water leave the body cells by the process of: