Class 10 Chemistry Chapter 1 Quiz

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Questions and Answers

Which of the following is a noble gas?

Chlorine
Oxygen
Nitrogen
Helium (correct)

What is the atomic number of carbon?

7
8
6 (correct)
9

What is the chemical symbol for sodium?

Nu
So
Na (correct)
No

What is the chemical formula for water?

H2O (A) Signup and view all the answers

Which element is the most abundant in the Earth's crust?

Oxygen (C) Signup and view all the answers

What is the pH value of a neutral solution?

7 (D) Signup and view all the answers

Flashcards

What is Helium?

A colorless, odorless, and unreactive gas that is the second most abundant element in the universe.

What is the atomic number?

The number of protons in an atom's nucleus, which defines the element.

What is Sodium?

A soft, silvery-white metal that is highly reactive.

What is the chemical formula for water?

The chemical formula for water, indicating that it consists of two hydrogen atoms and one oxygen atom.

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What is the most abundant element in the Earth's crust?

The most abundant element found in the Earth's crust, making up nearly half of its mass.

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What is the pH value of a neutral solution?

A pH value of 7 indicates a neutral solution, neither acidic nor basic.

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Study Notes

Elements

Noble gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
Carbon has an atomic number of 6.
The chemical symbol for sodium is Na.
The chemical symbol for tungsten is W, and it is the heaviest element with a stable isotope.

Compounds

The chemical formula for water is H₂O.

Earth's Crust

Oxygen is the most abundant element in the Earth's crust, making up about 46% of its mass.

Acids and Bases

A neutral solution has a pH value of 7.

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Description

Test your knowledge of chemistry with this quiz on Class 10 Chemistry Chapter 1. Answer questions about the atomic number of carbon, noble gases, and the chemical symbol for sodium. See how well you know the basics of chemistry!