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Test Report

Chemical Reactions And Equations

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Total Score: 12.50%

1 Correct Answers

7 Wrong Answers

0Unattempted

Score Analysis

  • Wrong: 88%
  • Correct: 13%
  • Unattempted: 0%

Time Spend: 10 Sec

1 2 Sec

7 8 Sec

00 Sec

Time Analysis

  • Wrong: 80%
  • Correct: 20%
  • Unattempted: 0%

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Test Report

Chemical Reactions And Equations

Q1.

The reaction where a molecule of Hydrogen combines with a molecule of Chlorine to form 2 molecules of Hydrochloric Acid (HCl) is :

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ANS

Decomposition Reaction

Combination Reaction

Double Displacement Reaction

Displacement Reaction

Q2.

Which of the following is a decomposition reaction?

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ANS

NaOH + HCl → NaCl + H2O

NH4CNO → H2NCONH2

2KClO3 → 2KCl + 3O2

H2 + I2 → 2HI

Q3.

Which of the following is a displacement reaction?

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ANS

CaCO3 → CaO + CO2

CaO + 2HCl → CaCl2 + H2O

Fe + CuSO4 → FeSO4 + Cu

NaOH + HCl → NaCl + H2O

Q4.

Which of the following represents a double displacement reaction?

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ANS

2H2 + O2 → 2H2O

2Mg + O2 → 2MgO

AgNO3 + NaCl → AgCl +NaNO3

H2 + Cl2 → 2HCl

Q5.

Which of the following is not a decomposition reaction?

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ANS

CaCO3 → CaO + CO2

2KClO3 → 2KCl + 3O2

H2 + Cl2 → 2HCl

Digestion of food in body

Q6.

Which of the following is a redox reaction?

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ANS

H2 + Cl2 → 2HCl

CaCO3 → CaO + CO2

CaO + 2HCl → CaCl2 + H2O

NaOH + HCl → NaCl + H2O

Q7. Which of the following statement is incorrect?

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ANS

In oxidation, oxygen is added to a substance. In reaction, hydrogen is added to a substance Oxidizing agent is oxidized Reducing agent is oxidized

Q8. Which of the following is a combustion reaction?

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ANS

Boiling of water

Melting of wax

Burning of petrol

None of these