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Last edited 25 days ago by Learn LoopHQ.

Answer key

Chapter: 01. Introduction To Chemistry

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Chemistry Chapter 1: Introduction to Chemistry - Practice Exam

Total Marks: [You can assign marks per question/section if desired] Time: [You can set a time limit if desired]

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Section 1: Multiple Choice Questions (MCQs)

Choose the best answer for each question.

Which branch of Science primarily studies living organisms? (a) Physics (b) Chemistry © Biology (d) Geology

What is the main focus of Chemistry? (a) The study of stars and planets (b) The study of the composition and properties of matter © The study of ancient civilizations (d) The study of weather patterns

What was the mythical substance that alchemists tried to find, believing it could turn metals into gold? (a) The universal solvent (b) The elixir of life © The philosopher’s stone (d) The golden crucible

Who is widely known as the “Father of Modern Chemistry”? (a) John Dalton (b) Dmitri Mendeleev © Antoine Lavoisier (d) Robert Boyle

Which type of medicine is used specifically to reduce body pain? (a) Antipyretic (b) Antibiotic © Analgesic (d) Antacid

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Section 2: Fill in the Blanks

Complete each sentence with the correct word(s).

The systematic knowledge gained by humans through observations and experimentation is called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

Alchemists were among the first to isolate the metals zinc and _ _ _ _ _ _ _ _ _ _ _ _ _ _.

Dmitri Mendeleev is famous for creating the _ _ _ _ _ _ _ _ _ _ _ _ _ _ of elements.

Sir J.J. Thomson is credited with the discovery of _ _ _ _ _ _ _ _ _ _ _ _ _ _.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ are chemicals that provide nutrients to crops, helping them grow better.

Salt is a very common _ _ _ _ _ _ _ _ _ _ _ _ _ _ used to prevent food from spoiling.

Nylon and polyester are examples of _ _ _ _ _ _ _ _ _ _ _ _ _ _ fibres, known for being strong and wrinkle-resistant.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ acid in the stomach helps in the digestion of food.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ are chemical substances that control various activities in the human body.

Excessive use of chemicals like fertilisers and _ _ _ _ _ _ _ _ _ _ _ _ _ _ can harm the environment.

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Section 3: True/False Questions

Read each statement and write True or False.

Chemistry only explains changes that happen inside a laboratory.

Alchemists successfully found a magical substance that could extend one’s lifespan indefinitely.

Antoine Lavoisier established that sulphur is an element and water is a compound.

Pesticides are chemicals primarily used to protect crops from fungal infections.

Common fuels such as LPG, petrol, and diesel are products available due to Chemistry.

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Section 4: Explanations of Terms

Briefly explain each term in one or two sentences.

Science

Alchemist

Antipyretic

Food Preservation

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Section 5: Short Answer Questions

Answer the following questions in 2-3 sentences.

Name the three main branches of Science.

List two useful techniques developed by alchemists during their experiments.

What is the purpose of insecticides in agriculture?

If a person has a fever, which type of medicine should they take, and what will it do?

Give two examples of how Chemistry has helped in the growth of industries.

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Section 6: Diagram-Based Questions

Look at the diagram below showing the branches of Science. Fill in the blank to complete the diagram.

{

"image_description": "A hierarchical diagram showing 'Science' at the top, branching into three main categories. The first branch is labeled 'Physics', the second is blank, and the third is labeled 'Biology'. Below the blank branch, the sub-branches 'Organic Chemistry', 'Inorganic Chemistry', and 'Physical Chemistry' are shown.",

"style": "simple diagram, hierarchical",

"elements_to_include": ["Science", "Physics", "Biology", "Organic Chemistry", "Inorganic Chemistry", "Physical Chemistry"],

"keywords_for_ai_generator": ["science branches", "chemistry types", "education diagram"]

}

Science branches into Physics, _ _ _ _ _ _ _ _ _ _ _ _ _ _, and Biology.

Observe the diagram titled ‘Importance of Chemistry in Everyday Life’. Name two different categories from this diagram where Chemistry plays a significant role.

{

"image_description": "A diagram titled 'Importance of Chemistry in Everyday Life' features categories with examples: Food Products (butter, cheese, refined oil, cold drink), Synthetic Fibres (teryelene, nylon), Increase in Crop Production (fertilisers, insecticides), Medicines (capsules, liquid drugs), Consumer Goods (perfume, toothpaste, cream, soaps), Recreation (badminton racquet, cricket ball), Roads and Buildings (cement, paints, glass), and Transport (burning of fuels in vehicle).",

"style": "infographic, diagram",

"elements_to_include": ["food products", "synthetic fibres", "crop production", "medicines", "consumer goods", "transport", "buildings"],

"keywords_for_ai_generator": ["chemistry impact", "daily life", "applications", "importance"]

}

(a) _ _ _ _ _ _ _ _ _ _ _ _ _ _

(b) _ _ _ _ _ _ _ _ _ _ _ _ _ _

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Section 7: Long Answers

Answer the following questions in 4-5 sentences.

Discuss how Chemistry plays an important role in two areas of our daily life, such as transport and building materials.

Explain some of the negative impacts or “dark sides” that Chemistry can have, particularly concerning dangerous products and environmental harm.

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Section 8: Environmental Awareness / Everyday Use

Why is it important for farmers to increase crop production, and how do Chemistry-based products specifically help them achieve this?

Describe the roles of hydrochloric acid, enzymes, and hormones as chemical substances within the human body.

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