Classification of Matter

Q.

Which are stronger covalent, ionic, and metallic bonds?

Q.

Is water a Lewis base?

Q. A few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents a correct arrangement?

1. Water, air, wind
2. Air, sugar, oil
3. Oxygen, water, sugar
4. Salt, juice, air

Q. Which of the following substances does not contain acid?

1. Orange
2. Baking soda
3. Vinegar
4. Curd

Q. Write chemical name of bleaching powder. Which gas is released when it is exposed to air? Write chemical reaction involved in preparation of bleaching powder.

Q. Which of these contains a base?

1. Orange
2. Baking soda
3. Curd
4. Vinegar

Q. (a) Define the term 'matter'.
(b) Mention the various physical states of matter and
explain their properties (shape, volume, compressibility,
and diffusion) in tabular format.
(c) Which of the given states of matter show the property
of fluidity?
[8 Marks]

Q.

The taste of an acid is

1. salty

2. sour

3. sweet

4. bitter

Q. An electrovalent bond is formed when a metal atom transfers one or more electrons to a non-metal atom in :

1. ionic compounds
2. covalent compounds
3. metallic compounds
4. crystalline solids

Q.

What are the three states of matter around us? ​
Which of the following represents the substances in the increasing order of the force of attraction between their particles?​

(a) Kerosene<Air<Salt (b) Air<Sugar<Oil​

(c) Hydrogen gas<Juice<Chair (d) Salt<Water<Air​

Q. 29. Property of matter and their measurement

Q. Why atoms are very reactive?

Q. Acids taste while bases taste .

1. sweet
2. bitter
3. sour
4. salty

Q. Tabulate the differences in the characteristics of states of matter.

Q. In $P_4{O}_{10}$, the number of the oxygen atoms bonded to each phosphorous atom is:

1. 2
2. 3
3. 4
4. 5

Q. Which of the following tend to gain electrons easily?

1. Metals
2. Non-metals
3. Metalloids
4. Noble gases

Q. All the following statements are true about carbon dioxide except:

1. Its molecular formula is $C{O}_2$
2. Its molecular mass is 44 u
3. Dense than air
4. It always exists as gas

Q.

The swimmer is able to cut through water in a swimming pool. Why?