Test: Matter In Our Surroundings (Hard) - Class 9 MCQ

Change Of A Liquid Into Vapors at any temperature below its boiling point is called as ______________.

A strip of magnesium metal is burnt in the flame. It is observed that :

For determining the melting point of ice, the thermometer should be kept :

A student takes some water in a beaker and heats it over a flame for determining its boiling point. He keeps on taking its temperature reading. He observes that the temperature of the water :

Which of the following matters?

Particles of matter are

The property to flow is unique to fluids. Which one of the following statements is correct?

On converting 25°C, 38°C and 66°C to Kelvin scale, the correct sequence of temperature will be

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 the Kelvin scale?

In which of the following conditions, the distance between hydrogen gas molecules 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

The boiling point of a gas is − 80ºC. This temperature is equivalent to

The standard room temperature is taken as

Which of the following factors does not increase the rate of evaporation?

The boiling point of water at normal atmospheric pressure is

300 K temperature may be written in the Celsius scale as

The three states of matter are:

What is the correct term for the phase change from gas directly into solid?