Chapter 11- Electricity.pdf
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Chapter 11: Electricity NCERT 2024 Notes with Important Questions
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Chapter 12- Magnetic effects and electric current.pdf
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Chapter 12: Magnetic effects and electric current NCERT 2024 Notes with Important Questions
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Chapter 13- Our environment.pdf
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Chapter 13: Our environment NCERT 2024 Notes with Important Questions
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What type of reaction is represented by the equation: 2H₂ + O₂ → 2H₂O?
Anonymous Quiz
81%
Combination
12%
Decomposition
4%
Displacement
3%
Double Displacement
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Which of the following is a displacement reaction?
Anonymous Quiz
72%
Zn + H₂SO₄ → ZnSO₄ + H₂
6%
2H₂ + O₂ → 2H₂O
9%
CaCO₃ → CaO + CO₂
12%
NaOH + HCl → NaCl + H₂O
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The reaction between an acid and a base to form salt and water is called:
Anonymous Quiz
14%
Combination Reaction
8%
Decomposition Reaction
71%
Neutralization Reaction
6%
Redox Reaction
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Which of the following equations represents a redox reaction?
Anonymous Quiz
40%
Zn + CuSO₄ → ZnSO₄ + Cu
15%
CaCO₃ → CaO + CO₂
34%
NaOH + HCl → NaCl + H₂O
10%
2KClO₃ → 2KCl + 3O₂
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In the reaction Zn + CuSO₄ → ZnSO₄ + Cu, which substance is oxidized?
Anonymous Quiz
57%
Zn
22%
Cu
10%
SO₄
10%
ZnSO₄
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Which of the following reactions is an example of a decomposition reaction?
Anonymous Quiz
77%
CaCO₃ → CaO + CO₂
10%
2H₂ + O₂ → 2H₂O
8%
Zn + H₂SO₄ → ZnSO₄ + H₂
5%
NaOH + HCl → NaCl + H₂O
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What is the product of the reaction between magnesium and hydrochloric acid?
Anonymous Quiz
66%
MgCl₂ and H₂
14%
MgCl and H₂O
12%
MgCl₂ and H₂O
8%
MgCl and H₂
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Which of the following represents a neutralization reaction?
Anonymous Quiz
78%
HCl + NaOH → NaCl + H₂O
11%
2H₂ + O₂ → 2H₂O
6%
CaCO₃ → CaO + CO₂
5%
Zn + CuSO₄ → ZnSO₄ + Cu
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Which type of reaction is represented by the equation: 2KClO₃ → 2KCl + 3O₂?
Anonymous Quiz
18%
Combination
70%
Decomposition
8%
Displacement
5%
Double Displacement
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What is the color change when phenolphthalein is added to a basic solution?
Anonymous Quiz
56%
Colorless to pink
30%
Pink to colorless
9%
Blue to red
5%
Red to blue
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What is observed when lead nitrate is heated?
Anonymous Quiz
61%
Brown fumes of NO₂
16%
White fumes of NO₂
16%
Yellow fumes of NO₂
8%
Colorless fumes of NO₂
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Which of the following reactions is an example of a combination reaction?
Anonymous Quiz
80%
2H₂ + O₂ → 2H₂O
12%
CaCO₃ → CaO + CO₂
5%
Zn + H₂SO₄ → ZnSO₄ + H₂
3%
NaOH + HCl → NaCl + H₂O
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What is the general form of a decomposition reaction?
Anonymous Quiz
71%
AB → A + B
15%
A + B → AB
9%
AB + C → AC + B
5%
AB + CD → AD + CB
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Which of the following is a balanced chemical equation?
Anonymous Quiz
18%
H₂ + O₂ → H₂O
70%
2H₂ + O₂ → 2H₂O
5%
H₂ + 2O₂ → H₂O₂
7%
2H₂ + 2O₂ → 2H₂O
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In a chemical reaction, what is the substance that is consumed?
Anonymous Quiz
50%
Reactant
23%
Product
20%
Catalyst
7%
Enzyme
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Which of the following is an example of a double displacement reaction?
Anonymous Quiz
83%
Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl
12%
Zn + CuSO₄ → ZnSO₄ + Cu
4%
CaCO₃ → CaO + CO₂
1%
2H₂ + O₂ → 2H₂O
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