Physical Nature of Matter

Q.

Give two reasons to justify [5 MARKS]

(a) Water at room temperature is a liquid.
(b) An iron almirah is a solid at room temperature.

Q. What is the physical state of water at 250°C or 100°C.

Q.

The mass per unit volume of a substance is called density. (Density = mass / volume). Arrange the following in order of increasing density.

Air, Exhaust from chimneys, Honey, Water, Chalk, Cotton and Iron. [3 MARKS]

Q.

The mass per unit volume of a substance is called density (density = mass/volume). Arrange the following in order of increasing density - air, exhaust from chimney, honey, water, chalk, cotton, and iron.

Q.

What is the physical state of matter at 100°C . State the reason.

Is it water or water vapour????

Q.

Write an activity to show that matter is particulate in nature

Q.

Name 10 physical objects which are not matter.

Q. What is capillarity?

Q.

Define cohesive force and adhesive force of molecules.

Q. What state of matter is fire?

Q.

Is fire matter ?

Q. Matter is anything that has mass and takes up space.

1. False
2. True

Q.

The smell of hot sizzling food reaches you several metres away but to get the smell from cold food you have to go close why it so

Q. What is difference between gas and plasma?

Q. Why a drop of dettolis evenly distributed in a bucket of water without need of stirring

Q.

The intermolecular force of attraction is the weakest in gases.

1. True
2. False

Q. When sugar is dissolved in water, it disappears because the sugar particles __________.

1. settle at bottom
2. are constantly moving
3. gets into the intermolecular space
4. are very small

Q.

The amount of space occupied by matter is called its ______.

Q. Which of the following statement is true about particles of matter?

1. Particles are large in size.
2. Particles have attraction force between them.
3. Particles of matter does not have space in between them.
4. Particles of matter are always still.

Q.

It is said that atoms are smallest particles of any matter , and it is also say that every atom is made up of mainly Three Types of particles electron proton neutron so electron proton and neutron are the smallest particles of matter then it is right or wrong that atoms are a smallest particles of matter.

Q. Give reasons for the following:
The smell of hot sizzling food reaches you several meters away , but to get the smell from cold food you have to go close.

Q.

What is the difference between molecules and the matter ?

Q.

The size of particles of a matter can be best described as _________

1. miniscule

2. 8cm

3. 0

4. Infinity

Q. Why smell is not matter explain

Q. A diver is able to cut throw water in swimming pool.Which property of matter does this observation show?

Q. Is matter around us pure?

Q. Write three states of matter in increasing order of particle motion.

Q.

Substance which vaporise during burning gives_________.

1. sound

2. flame

3. combustion

4. none of these

Q.

Matter is _________ in nature.

1. continuous

2. particulate

3. both continuous and particulate

4. partially continuous and partially particulate

Q.

In the first experiment, a sample of Ascorbic acid produced in the laboratory contains 15.0g of carbon and 20.0g of oxygen. In the second experiment, Ascorbic acid is isolated from lemon containing 42.9% carbon. Show that the data is in accordance with the law of constant proportion.