Class 10th science notes
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πŸ“š Week 1 (Apr 7-13): Chemical Substances: Nature and Behaviour

Subtopics:
β€’ Chemical reactions and equations
β€’ Balancing chemical equations
β€’ Types of chemical reactions

To-Do:
πŸŽ₯ Watch chemical reactions lecture
πŸ“ Practice balancing equations
πŸ“– Review types of reactions
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Chapter 1- Chemical reactions and equations.pdf
2.7 MB
Chapter 1: Chemical reactions and equations NCERT 2025 Notes with Important Questions

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Chapter 1: Chemical Reactions and Equations.pdf
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βž₯ Chapter 1: Chemical Reactions and Equations handwritten notes

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Chapter 6: Life Processes.pdf
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βž₯ Chapter 6: Life Processes handwritten notes 😱

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Chapter 12: Electricity.pdf
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βž₯ Chapter 12: Electricity handwritten notes

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Chemical reactions and equation .pdf
5.6 MB
Chemical reactions and equation Notes with important questions for 2026 exam


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πŸ“š Quiz Time! 🎯

Get ready for today's quiz questions! πŸ“

Questions will be sent every 45 seconds
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What is the law of reflection that states the incident ray, reflected ray, and normal lie in the same plane?
Anonymous Quiz
54%
First law
28%
Second law
6%
Third law
13%
Snell's law
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For a concave mirror, when the object is at the focal point, the image is formed at?
Anonymous Quiz
16%
Focal point
23%
Center of curvature
49%
Infinity
12%
Behind the mirror
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The ability of a lens to converge or diverge light rays is known as its?
Anonymous Quiz
25%
Focal length
38%
Power
26%
Magnification
10%
Aperture
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In the lens formula, 1/f = 1/v - 1/u, what is the sign convention for a convex lens when the image is real?
Anonymous Quiz
43%
v positive
36%
v negative
14%
u positive
8%
f negative
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Which of the following is a balanced chemical equation?
Anonymous Quiz
17%
H2 + O2 β†’ H2O
69%
2H2 + O2 β†’ 2H2O
8%
H2 + 2O2 β†’ 2H2O
7%
2H2 + 2O2 β†’ 2H2O
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What type of reaction is represented by the equation: 2Mg + O2 β†’ 2MgO?
Anonymous Quiz
10%
Decomposition
82%
Combination
6%
Displacement
2%
Double displacement
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In a chemical equation, the arrow indicates?
Anonymous Quiz
65%
Direction of reaction
19%
Equality
7%
Reversibility
9%
Catalyst
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Which reaction releases heat?
Anonymous Quiz
16%
Endothermic
79%
Exothermic
4%
Neutralization
1%
Precipitation
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