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Use of Chemistry

I. Introduction

 A. Positive Uses of Chemistry

 B. Negative Uses of Chemistry

II. Positive Uses of Chemistry

 A. Medicine

 1. Drug development

 2. Diagnostic tests

 3. Treatment of diseases

 B. Agriculture

 1. Fertilizers

 2. Herbicides

 3. Pesticides

III. Negative Uses of Chemistry

 A. Pollution

 1. Air pollution

 2. Water pollution

 3. Land pollution

 B. Health Effects

 1. Respiratory problems

 2. Cancer

 3. Reproductive health issues

Here are some multiple-choice questions related to matter:

1. Which of the following is NOT a state of matter?

a) Solid

b) Liquid

c) Gas

d) Plasma

e) Energy

Answer: e) Energy

2. What is the process by which a solid changes directly to a gas?

a) Condensation

b) Melting

c) Sublimation

d) Freezing

Answer: c) Sublimation

3. Which of the following is an example of a homogeneous mixture?

a) Salad

b) Orange juice with pulp

c) Saltwater

d) Sand and water

e) Trail mix

Answer: c) Saltwater

4. What is the SI unit of mass?

a) Gram

b) Pound

c) Ounce

d) Kilogram

e) Newton

Answer: d) Kilogram

5. Which of the following statements is true about atoms?

a) Atoms are the smallest unit of matter that can exist on their own.

b) Atoms are made up of electrons and protons.

c) Atoms of different elements have different numbers of protons.

d) All of the above.

Answer: d) All of the above.

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