Elements and Types

Q.

Which state of matter has the strongest intermolecular force of attraction between its particles?

1. Solid

2. Liquid

3. Gas

4. Both liquid and gas

Q.

What is the element with symbol $\mathrm{Au}$?

Q.

20. Give two examples for each of the following:

(a). Elements

Q.

A/An__ is the simplest substance and cannot be broken down.

Q.

The force of attraction between the particles is strong in a liquid.

1. True
2. False

Q. _________ is a pure substance made up of only one kind of atom.

1. Element
2. Molecule
3. Water
4. Mixture

Q.

Categorize the following substances as Metals and Non-metals:
Graphite, Zinc, Diamond, Oxygen, Sodium, Aluminium, Silver, Carbon, Mercury, Phosphorous
[5 MARKS]

Q.

1. Define the following terms:

i. Element

Q.

Define :

(a) Elements

(b) Compounds

Q.

Arrange the following substances in the increasing order of forces of attraction between their particles : Water, ice, steam.

Q.

Mercury is a liquid non-metal at room temperature and pressure.

1. False

2. True

Q.

Basic form of matter that cannot be broken down into simpler substances by chemical reactions is called:

1. Substance

2. Mixture

3. Compound

4. Element

Q.

Kelvin- Plancks statement states that

Q.

Arrange the following substances in increasing order of intermolecular forces of attraction

Salt, juice, air

Q.

What is the most abundant element in the universe by mass?

1. Hydrogen

2. Carbon

3. Oxygen

4. Helium

Q. How do we the exception of metal and non-metals and how to identify them

Q.

Identify the element(s) that are liquid at room temperature and pressure.

1. Nitrogen

2. Mercury

3. Bromine

4. Calcium

Q.

Which of the following option shows the correct characteristics of non-metals?

1. Non-metals that are ductile

2. Non-metals are good conductors of heat

3. Non-metals are good conductors of electricity

4. Non-metals are insulators

Q.

Elements are mostly grouped into metals, non-metals and ___ .

Q.

Match the following:

$\begin{array}{cccc}\text{(i)}& \text{Water}& \text{(A)}& \text{Compound}\\ \text{(ii)}& \text{Hydrogen}& \text{(B)}& \text{Element}\\ \text{(iii)}& \text{Salt}& & \\ \text{(iv)}& \text{Gold}& & \\ \text{(v)}& \text{Carbon dioxide}& & \\ \text{(vi)}& \text{Iron}& & \end{array}$
The correct pairs are:-

1. (i, iii, iv) – A, (ii, v, vi) - B

2. (i, iii, v) – A, (ii, iv, vi) - B

3. (i, ii, v) – A, (iii, iv, vi) - B

4. (i, ii, iii) – A, (iv, v, vi) - B

Q.

What is the most abundant element in the universe by mass?

1. Carbon

2. Oxygen

3. Helium

4. Hydrogen

Q.

___ is the most abundant element in the universe.

Q.

Match the following:
$\begin{array}{cccc}\text{(i)}& \text{Water}& \text{(A)}& \text{Compound}\\ \text{(ii)}& \text{Hydrogen}& \text{(B)}& \text{Element}\\ \text{(iii)}& \text{Salt}& & \\ \text{(iv)}& \text{Gold}& & \\ \text{(v)}& \text{Carbon dioxide}& & \\ \text{(vi)}& \text{Iron}& & \end{array}$
The correct pairs are:

1. (i, iii, iv) – A, (ii, v, vi) - B

2. (i, iii, v) – A, (ii, iv, vi) - B

3. (i, ii, v) – A, (iii, iv, vi) - B

4. (i, ii, iii) – A, (iv, v, vi) - B

Q.

Which of these object will have maximum intermolecular spaces.

1. Rock

2. Milk

3. Steam

4. Water

Q.

Electrons moving like molecules of a gas exist in:

Q. Identify the correct pairs.

1. Gold - element, water - compound
2. Iron - compound, carbon dioxide - element
3. Carbon dioxide - compound, gold - compound
4. Iron - element, water - element

Q.

How is e=mc^2

Q.

The state of matter which can be easily compressed is:

1. solids

2. liquids

3. gases

4. none of these

Q. What is the fundamental thing that gives metals and non metals their properties

Q.

What is the most abundant element in the universe by mass?

1. Carbon

2. Oxygen

3. Helium

4. Hydrogen