Non Metals

Question 1

What are non-metals?

Answer 1

Non-metals are elements that typically lack the characteristics of metals and are usually poor conductors of heat and electricity.

Question 2

True or False: Non-metals can exist in all three states of matter at room temperature.

Answer 2

True

Question 3

Which of the following is a non-metal? a) Iron b) Oxygen c) Copper

Answer 3

b) Oxygen

Question 4

What is the most common physical property of non-metals?

Answer 4

Most non-metals are brittle in solid form and do not conduct electricity.

Question 5

Fill in the blank: Non-metals tend to gain electrons in chemical reactions, forming ______.

Answer 5

anions

Question 6

Name two non-metals that are essential for life.

Answer 6

Carbon and oxygen

Question 7

What is the primary use of nitrogen in industry?

Answer 7

Nitrogen is used as an inert gas in various chemical processes and to preserve food.

Question 8

True or False: Non-metals are typically found in the center of the periodic table.

Answer 8

False

Question 9

What is the chemical symbol for sulfur?

Answer 9

S

Question 10

Which non-metal is a key component of DNA and RNA?

Answer 10

Phosphorus

Question 11

What physical state is most commonly associated with non-metals at room temperature?

Answer 11

Gas

Question 12

Which non-metal is commonly used in fertilizers?

Answer 12

Nitrogen

Question 13

Fill in the blank: The preparation of chlorine gas can be achieved by the reaction of hydrochloric acid with ______.

Answer 13

manganese dioxide

Question 14

What is the primary characteristic of noble gases?

Answer 14

Noble gases are inert and do not readily react with other elements.

Question 15

True or False: Non-metals have high melting and boiling points.

Answer 15

False

Question 16

Which non-metal is used in the production of graphite and diamonds?

Answer 16

Carbon

Question 17

What does the term ‘allotropes’ refer to in the context of non-metals?

Answer 17

Allotropes refer to different structural forms of the same element, such as carbon in the forms of graphite and diamond.

Question 18

Which non-metal is essential for respiration in living organisms?

Answer 18

Oxygen

Question 19

What is a common use of hydrogen in industry?

Answer 19

Hydrogen is used in the production of ammonia for fertilizers.

Question 20

What is the chemical formula for ozone?

Answer 20

O3

Question 21

Fill in the blank: Non-metals are generally ______ conductors of heat and electricity.

Answer 21

poor

Question 22

Which non-metal is used in the semiconductor industry?

Answer 22

Silicon

Question 23

True or False: The majority of non-metals are gases at room temperature.

Answer 23

True

Question 24

What is the primary preparation method for obtaining phosphorus?

Answer 24

Phosphorus is prepared by heating phosphate rocks with carbon in an electric furnace.

Question 25

Which non-metal can form acids when combined with oxygen?

Answer 25

Sulfur