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Nursing Question Bank

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1265 available questions

Chemistry · Question 851

Which is a strong electrolyte?

  1. C₆H₆
  2. Ca(OH)₂
  3. CH₃COOH
  4. NaCl
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Correct answer: D

NaCl

NaCl is the answer marked in the supplied practice source.

Chemistry · Question 852

What is the oxidation number of chlorine in KClO₃?

  1. -2
  2. +6
  3. +5
  4. +1
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Correct answer: C

+5

+5 is the answer marked in the supplied practice source.

Chemistry · Question 853

What is the most common example of corrosion?

  1. Chemical decay
  2. Rusting of Aluminium
  3. Rusting of tin
  4. Rusting of Iron
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Correct answer: D

Rusting of Iron

Rusting of Iron is the answer marked in the supplied practice source.

Chemistry · Question 854

Which of these is an oxidation reaction?

  1. Fe²⁺ → Fe³⁺ + e⁻
  2. K⁺ + e⁻ → K
  3. Both A and B
  4. Cl₂ + 2e⁻ → 2Cl⁻
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Correct answer: A

Fe²⁺ → Fe³⁺ + e⁻

Fe²⁺ → Fe³⁺ + e⁻ is the answer marked in the supplied practice source.

Chemistry · Question 855

What is the oxidation number of a free element?

  1. -1
  2. 0
  3. +1
  4. +2
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Correct answer: B

0

0 is the answer marked in the supplied practice source.

Chemistry · Question 856

What is the addition of oxygen during a chemical reaction called?

  1. Oxidation
  2. Evaporation
  3. Reduction
  4. Sublimation
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Correct answer: A

Oxidation

Oxidation is the answer marked in the supplied practice source.

Chemistry · Question 857

Which is a weak electrolyte?

  1. NaOH
  2. CH₃COOH
  3. NaCl
  4. H₂SO₄
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Correct answer: B

CH₃COOH

CH₃COOH is the answer marked in the supplied practice source.

Chemistry · Question 858

Pure water is an example of:

  1. Weak electrolyte
  2. Strong electrolyte
  3. Strong acid
  4. Strong base
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Correct answer: A

Weak electrolyte

Weak electrolyte is the answer marked in the supplied practice source.

Chemistry · Question 859

What is a species called that reduces another substance by donating electrons?

  1. Dehydrating agent
  2. Oxidizing agent
  3. Coloring agent
  4. Reducing agent
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Correct answer: D

Reducing agent

Reducing agent is the answer marked in the supplied practice source.

Chemistry · Question 860

Why do non-metals act as oxidizing agents?

  1. They have low ionization energy
  2. They are more electropositive
  3. They are more electronegative
  4. They are neither electropositive nor electronegative
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Correct answer: C

They are more electronegative

They are more electronegative is the answer marked in the supplied practice source.