9th standard Science Chapter-1

9th Standard Science quiz Chapter-1

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9th Standard Science Chapter 1

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Q.1 In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container
(ii) Some hydrogen gas leaking out of the container

(iii) Increasing the volume of the container of hydrogen gas
(iv) Adding more hydrogen gas to the container without increasing the volume of the container

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Q.2 When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment:

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Q.3  A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is

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Q.4 Which one of the following statements is not true?

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Q.5 The correct procedure of heating iron-sulphur mixture to prepare iron sulphide is: :

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Q.6 When water at 0°C freezes to form ice at the same temperature of 0°C, then it:

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Q.7 When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporisation :

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Q.8 Which one of the following set of phenomena would increase on raising the temperature?

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Q.9 On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be:

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Q.10

Four students took separately the mixture of sand, common salt and ammonium chloride in beakers, added water, stirred the mixture well and then filtered. They reported their observations as shown below

StudentAs residueIn the filtrate
I
II
III
IV
Ammonium chloride
Common salt, Sand
Sand, Ammonium chloride
Sand
Sand, Common salt
Ammonium chloride
Common salt
Ammonium chloride, Common salt

Who reported the observations in the correct order of the components as residue and in the filtrate?

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