Sign Up

Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.

Have an account?

Sign In

Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.

Don't have account,

Forgot Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

Have an account?

You must login to ask a question.

Need An Account,

You must login to add post.

Need An Account,

Please briefly explain why you feel this question should be reported.

Please briefly explain why you feel this answer should be reported.

Please briefly explain why you feel this user should be reported.

Search
Ask A Question
Home/ Chemistry/Chemistry MCQ with Answer and Explanation : Oxidation and Reduction.

love-insta : Question and Answer Sharing Platform. Latest Articles

On: October 6, 2024 Posted in Chemistry, Education, Exam Comments: 0 Views: 232

Chemistry MCQ with Answer and Explanation : Oxidation and Reduction.

Question 91:

What is the oxidation state of manganese in MnO4−MnO4−​?
A) +4
B) +6
C) +7
D) -2

Answer: C) +7

Explanation: In the permanganate ion, manganese has an oxidation state of +7.

Question 92:

Which of the following species is a strong oxidizing agent?
A) Cr2O72−Cr2​O72−​
B) H2O2H2​O2​
C) I−I−
D) LiLi

Answer: A) Cr2O72−Cr2​O72−​

Explanation: The dichromate ion is a powerful oxidizing agent in acidic conditions.

Question 93:

Which of the following statements is true about oxidation and reduction?
A) Oxidation is always accompanied by reduction.
B) Oxidation and reduction can occur independently.
C) Both processes involve the same species.
D) Only oxidation involves the transfer of electrons.

Answer: A) Oxidation is always accompanied by reduction.

Explanation: Oxidation and reduction are coupled processes that occur together in a redox reaction.

Question 94:

What is the oxidation state of carbon in acetic acid (CH3COOHCH3​COOH)?
A) +1
B) +2
C) +3
D) +4

Answer: C) +3

Explanation: The oxidation state of the carbon atom in acetic acid is +3.

Question 95:

Which of the following best describes the term “oxidizing agent”?
A) A substance that gains electrons.
B) A substance that loses electrons.
C) A substance that remains unchanged.
D) A substance that only undergoes reduction.

Answer: A) A substance that gains electrons.

Explanation: An oxidizing agent accepts electrons and is reduced in a redox reaction.

Question 96:

In which of the following reactions is nitrogen oxidized?
A) NH3→N2+H2NH3​→N2​+H2​
B) N2+3H2→2NH3N2​+3H2​→2NH3​
C) NO+O2→NO2NO+O2​→NO2​
D) N2O+H2→N2+H2ON2​O+H2​→N2​+H2​O

Answer: C) NO+O2→NO2NO+O2​→NO2​

Explanation: Nitrogen in nitric oxide is oxidized from +2 to +4 in NO2NO2​.

Question 97:

What is the oxidation state of sulfur in H2SO4H2​SO4​?
A) +2
B) +4
C) +6
D) 0

Answer: C) +6

Explanation: In sulfuric acid (H2SO4H2​SO4​), sulfur has an oxidation state of +6.

Question 98:

Which of the following ions is a common oxidizing agent?
A) Fe2+Fe2+
B) Cu+Cu+
C) Cr2O72−Cr2​O72−​
D) AgAg

Answer: C) Cr2O72−Cr2​O72−​

Explanation: The dichromate ion is frequently used as an oxidizing agent in redox reactions.

Question 99:

What happens to the oxidation state of chlorine in the reaction Cl2+2NaOH→NaCl+NaClO+H2OCl2​+2NaOH→NaCl+NaClO+H2​O?
A) It is reduced.
B) It is oxidized.
C) It remains unchanged.
D) It becomes negative.

Answer: B) It is oxidized.

Explanation: Chlorine in NaClONaClO has a higher oxidation state than in NaClNaCl, indicating oxidation.

Question 100:

In which of the following pairs of species does one undergo oxidation and the other reduction?
A) ZnZn and Cu2+Cu2+
B) AgAg and NaNa
C) Cl−Cl− and O2O2​
D) Fe2+Fe2+ and H2H2​

Answer: A) ZnZn and Cu2+Cu2+

Explanation: In this reaction, zinc is oxidized while copper is reduced, demonstrating a redox process.

Previous article
Next article

Leave a comment