4

Question 1

What does HCI stand for?

Answer 1

Hydrochloric Acid

HCI is a strong acid commonly used in laboratories and industry.

Question 2

What is the general characteristic of compounds ending with -ide?

Answer 2

They typically indicate a binary compound consisting of two elements.

Examples include sodium chloride (NaCl) and hydrogen sulfide (H2S).

Question 3

What do compounds ending with -ate or -ite indicate?

Answer 3

They usually contain oxygen in addition to another element.

For example, sulfate (SO4^2-) and nitrite (NO2^-).

Question 4

What is the significance of ‘Zinc = 2n’?

Answer 4

Indicates that zinc has a +2 oxidation state.

This is important for understanding zinc’s role in chemical reactions.

Question 5

What are the properties of metals? List at least three.

Answer 5

• Lustrous - Shiny
• Malleable - Can be bent without breaking
• Ductile - Can be stretched into wires

Metals are essential in construction and manufacturing due to these properties.

Question 6

What is a property of non-metals?

Answer 6

Brittle

Non-metals tend to break or shatter when force is applied.

Question 7

How do non-metals generally conduct electricity?

Answer 7

Bad conductors of electricity and heat

This is in contrast to metals, which are good conductors.

Question 8

What state can non-metals exist in at room temperature?

Answer 8

• Liquid (Bromine)
• Solid (Carbon, Phosphorus, Sulfur, Iodine)
• Gas

Non-metals can be found in all three states under standard conditions.

Question 9

Define the properties of metalloids.

Answer 9

Have properties of both metals and non-metals.

Metalloids are often used in semiconductors.

Question 10

What are the special elements at room temperature?

Answer 10

• Liquids: Mercury and Bromine
• Solids: Carbon, Phosphorus, Sulfur, Iodine

Most elements are solids at room temperature, with very few exceptions.

Question 11

True or False: Group 1 metals react harshly with water.

Answer 11

True

This reactivity can lead to explosive reactions with water.

Question 12

What forms does carbon exist in at room temperature?

Answer 12

• Diamond
• Graphite

These allotropes have very different physical properties.

Question 13

Name two types of carbohydrates.

Answer 13

• Sugar (fruits, honey)
• Starch (rice, bread)

Carbohydrates are a primary energy source for the body.

Question 14

List two sources of protein.

Answer 14

• Meat
• Eggs

Proteins are essential for building and repairing tissues.

Question 15

Fill in the blank: _______ is found in vegetables and is a type of fiber.

Answer 15

Cellulose

Cellulose aids in digestion.