Match the physical quantities given in column A to their Sl units given in column B. Column (A) Column (B) (a) Pressure (i) Cubic metre (b) Temperature (ii) kilogram (c) Density (iii) Pascal (d) Mass (iv) Kelvin (e) Volume (v) Kilogram per cubic metre

(a) Pressure is known as force per unit area. Its unit is Pascal. (b)Temperature is a physical property of matter that quantitatively expresses hot and cold. Its unit is Kelvin. (c) The density, of a substance is its mass per unit volume. Its unit is kilogram per cubic metre. (d) Mass is a large body of matter with no definite shape. Its SI unit is Kilogram. (e) Volume is the quantity of three-dimensional space enclosed by a closed surface. Its unit is cubic metre. Column (A) Column (B) (a) Pressure (iii) Pascal (b) Temperature (iv) Kelvin (c) Density (v) Kilogram per cubic metre (d) Mass (ii) kilogram (e) Volume (i) Cubic metre

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The boiling points of diethyl ether, acetone and $n$ -butyl alcohol are $35 ° C, 56 ° C$ and $118 ° C$ respectively. Which one of the following correctly represents their boiling points in Kelvin scale?

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Important Questions on Matter in Our Surroundings

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9th CBSE

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NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Multiple Choice Questions>Q 9

Which condition out of the following will increase the evaporation of water?

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NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Multiple Choice Questions>Q 10

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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NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Short Answer Questions>Q 11

A sample of water under study was found to boil at

102 ° C

at normal temperature and pressure. Is the water pure? Will this water freeze at

0 ° C ?

Comment.

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9th CBSE

IMPORTANT

NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Short Answer Questions>Q 12

A student heats a beaker containing ice and water. He measures the temperature of the content of the beaker as a function of time. Which of the following figure would correctly represent the result? Justify your choice.

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9th CBSE

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NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Short Answer Questions>Q 13

Evaporation of a liquid at room temperature leads to a _____effect.

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NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Short Answer Questions>Q 13

At room temperature the forces of attraction between the particles of solid substances are _____ than those which exist in the gaseous state. (stronger / weaker)

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9th CBSE

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NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Short Answer Questions>Q 13

The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called _____.

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9th CBSE

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NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Short Answer Questions>Q 14

Match the physical quantities given in column A to their Sl units given in column B.

	Column (A)		Column (B)
(a)	Pressure	(i)	Cubic metre
(b)	Temperature	(ii)	kilogram
(c)	Density	(iii)	Pascal
(d)	Mass	(iv)	Kelvin
(e)	Volume	(v)	Kilogram per cubic metre

The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C,56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale?

Important Questions on Matter in Our Surroundings

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The boiling points of diethyl ether, acetone and $n$ -butyl alcohol are $35 ° C, 56 ° C$ and $118 ° C$ respectively. Which one of the following correctly represents their boiling points in Kelvin scale?