In This Post we are providing Chapter-1 Redox Reactions NCERT MCQ for Class 11 Chemistry which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.
NCERT MCQ ON REDOX REACTIONS
Question 1: The loss of electron is termed as
- a) oxidation
- b) reduction
- c) combustion
- d) neutralization
Answer: oxidation
Question 2: When a strip of metallic zinc is placed in an aqueous solution of copper nitrate the blue colour of the solution disappear due to formation of
- a) Zn2+
- b) Cus
- c) ZnS
- d) Cu2+
Answer: Zn2+
Question 3: The correct order of electron releasing tendency of the metals Cu, Zn and Ag is in the order
- a) Zn > Cu > Ag
- b) Zn > Ag > Cu
- c) Cu > Zn > Ag
- d) Ag > Zn > Cu
Answer: Zn > Cu > Ag
Question 4: What is the oxidation number of elements in the free or in the uncombined state ?
- a) 0
- b) –1
- c) +1
- d) +2
Answer:
Question 5: ‘Oxidation number of H in NaH, CaH2 and LiH, respectively is
- a) –1,–1, –1
- b) –1, +1, + 1
- c) +1, +1, –1
- d) +1, + 1, + 1
Answer: –1,–1, –1
Question 6: Which of the following is the correct representative of stock notation for auric chloride?
- a) Au(III)Cl3
- b) Au(II)Cl2
- c) Au(I)Cl2
- d) None of these
Answer: Au(III)Cl3
Question 7: Oxidation number of N in HNO3 is
- a) + 5
- b) + 3.5
- c) – 3.5
- d) –5
Answer: + 5
Question 8: The oxidation number of chromium in potassium dichromate is
- a) + 6
- b) – 5
- c) – 2
- d) + 2
Answer: + 6
Question 9: Oxidation number of cobalt in K[Co(CO)4] is
- a) –3
- b) +3
- c) +1
- d) –1
Answer: –3
Question 10: Oxidation number of carbon in CH2Cl2 is
- a) 0
- b) –4
- c) +4
- d) –2
Answer:
Question 11: The oxidation state of osmium (Os) in OsO4 is
- a) +8
- b) +6
- c) +7
- d) +4
Answer: +8
Question 12: Which of the following transition metal has zero oxidation state ?
- a) [Fe(CO)5]
- b) NOClO4
- c) NH2.NH2
- d) CrO5
Answer: [Fe(CO)5]
Question 13: In which of the compounds does ‘manganese’ exhibit highest oxidation number ?
- a) KMnO4
- b) MnO2
- c) Mn3O4
- d) MnSO4
Answer: KMnO4
Question 14: A metal ion M3+ loses 3 electrons, its oxidation number will be
- a) +6
- b) –3
- c) +3
- d) 0
Answer: +6
Question 15: The correct name for NO2 using stock notation is
- a) nitrogen (iv) oxide
- b) All of these
- c) nitrogen dioxide
- d) nitrogen per oxide
Answer: nitrogen (iv) oxide