Test: Oxides & Oxo Anions of Cr & Mn

Question 1

Only One Option Correct Type

Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.

Q.

Which is most basic oxide of chromium?

Accepted Answer

CrO

Answer

CrO2

Answer

CrC3

Answer

Cr2O3

Question 2

The basic character of the transition metal monoxides follows the order

(Atomic Number, Ti = 22, V = 23, Cr = 24, Fe = 26)

Accepted Answer

TiO > VO > CrO > FeO

Answer

VO > CrO > TiO > FeO

Answer

CrO > VO > FeO > TiO

Answer

TiO > FeO > VO > CrO

Question 3

MnO₄^- + S^2- + H⁺ → Mn²⁺ +S + H₂O When this equation is balanced, the total number of coefficients on the left hand side are

Accepted Answer

23

Answer

15

Answer

17

Answer

14

Question 4

when this equation is balanced, the num ber of OH^- ions added

Accepted Answer

2 OH^-ions on the right side

Answer

4 OH^-ions on the left side

Answer

2 OH^-ions on the left side

Answer

4 OH^-ions on the right side

Question 5

One mole of each KMnO₄ and K₂Cr₂O₇ can oxidise ........... moles of ferrous ion.

Accepted Answer

5 and 6

Answer

5 and 5

Answer

6 and 5

Answer

6 and 6

Question 6

is of intense pink colour, though Mn is in (+7) oxidation state. It is due to

Accepted Answer

character transfer when oxygen gives its electron to Mn making it Mn (+ VI) hence, coloured

Answer

oxygen gives colour to it

Answer

charge transfer when Mn gives its electron to oxygen

Answer

None of the above is correct

Question 7

Which of the following is incorrect statement?

Accepted Answer

Both MnO₄^- and MnO₄^2- are diamagnetic

Answer

Both MnO₄^-, MnO₄^2- have tetrahedral shape

Answer

MnO₄^- is purple while MnO₄^2- ion is green

Answer

MnO₄^- is diamagnetic while MnO₄^2- ion is paramagnetic

Question 8

Pyrolusite in MnO₂ is used to prepare KMnO₄. Steps are

Here, I and II are

Accepted Answer

fused with KOH/air, electrolytic oxidation

Answer

fused with KOH/air, electrolytic reduction

Answer

fuse with cone. HNO₃/air, electrolytic oxidation

Answer

All are correct

Question 9

Which is the correct statem ent about structure?

Accepted Answer

It has neither Cr—Cr bonds nor O—0 bonds

Answer

It has one Cr—Cr bond and six O—O bond

Answer

It has no Cr—Cr bonds and has six O—O bond

Answer

It has one Cr—Cr bond and seven Cr—O bonds

Question 10

Out of Cr (VI) as , which is better oxidising agent?

Accepted Answer

, acidic medium

Answer

, basic medium

Answer

, basic medium

Answer

CrO₃, basic medium

Question 11

One or More than One Options Correct Type

Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

Q.

Which of the following statem ents is correct when a mixture of NaCI and K₂Cr₂O₇ is gently warmed with cone. H₂SO₄?

Accepted Answer

Question 12

Amphoteric oxides in the following is/are

Accepted Answer

Question 13

Which of the following on heating produce oxygen gas?

Accepted Answer

Question 14

Which of the following statements is not true?

Accepted Answer

Na₂Cr₂O₇ is preferred over K₂Cr₂O₇ in volumetric analysis

Answer

On passing H₂S through acidified K₂Cr₂O₇ solution, a milky colour is observed

Answer

K₂Cr₂O₇ solution in acidic medium is orange

Answer

K₂Cr₂O₇ solution becomes yellow on increasing the pH beyond 7

Question 15

when this redox reaction is balanced in acidic medium, we get

Accepted Answer

Question 16

Comprehension Type

Direction (Q. Nos. 16 and 17) This section contains a paragraph, describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

Passage

Oxides are generally formed by the reaction of metals with oxygen at high temperatures. All the metals except scandium form MO oxides which are ionic. The highest oxidation number in the oxides, coincides with the group number and is attained in Sc₂O₃ to Mn₂O₇. Beyond 7th group, higher oxides coinciding with the group number do not form. As the oxidation number of metal increases covalent character and acidity increases. Mn₂O₇, CrO₃ are acidic and their lower oxides are basic and amphoteric. Stability of higher oxides increases down the group.

Q.

Which of the following undergo disproportionation?

Q.

Which of the following reacts with both acids and bases?

Accepted Answer

Both (a) and (b)

Answer

ZnO

Answer

V2O5

Answer

CrO3

Question 17

Oxides are generally formed by the reaction of metals with oxygen at high temperatures. All the metals except scandium form MO oxides which are ionic. The highest oxidation number in the oxides, coincides with the group number and is attained in Sc₂O₃ to Mn₂O₇. Beyond 7th group, higher oxides coinciding with the group number do not form. As the oxidation number of metal increases covalent character and acidity increases. Mn₂O₇, CrO₃ are acidic and their lower oxides are basic and amphoteric. Stability of higher oxides increases down the group.

Q.

Which of the following undergo disproportionation?

Q.

Which of the following undergo disproportionation?

Accepted Answer

Answer

Answer

V2O5

Answer

CuO

Question 18

Matching List Type

Direction (Q. Nos. 18 and 19) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

Q.

Match the Column I with Column II and mark the correct option from the codes given below.

Accepted Answer

Answer

Answer

Answer

Question 19

Match the Column I with Column II and mark the correct option from the codes given below.

Accepted Answer

Answer

Answer

Answer

Question 20

One Integer Value Correct Type

Direction (Q. Nos. 20-23) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive

Q.

The number of moles of FeC₂O₄ that reduces two moles of KMnO₄ in acidic medium are

Accepted Answer

Question 21

50 cc of 0.04 M K₂Cr₂O₇ in acidic medium oxidises a sample of H₂S gas to sulphur. Volume of 0.03 M KMnO₄ required to oxidise the same amount of H₂S gas to sulphur in acidic medium is 10 x x. Here, the value of x is

Accepted Answer

Question 22

The number of sigma bonds in ion are

Accepted Answer

Question 23

If molarity of K₂Cr₂O₇ solution is 0.5 M, its normality value is

Accepted Answer

Question 24

Statement Type

Direction (Q. Nos. 24 and 25) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

Q.

Statement I ; When a solution of potassium chromate is treated with an excess of dilute nitric acid chromate undergoes oxidation.

Statement II : Dichromate ions are produced in above process.

Accepted Answer

Statement II is correct but Statement I is incorrect

Answer

Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

Answer

Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I

Answer

Statement I is correct but Statement II is incorrect

Question 25

Statement I : The oxidation state of chromium in the final product formed by the reaction between Kl and acidified potassium dichromate solution has green colour.

Statement II : The product has Cr³⁺ ions.

Accepted Answer

Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

Answer

Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I

Answer

Statement I is correct but Statement II is incorrect

Answer

Statement II is correct but Statement I is incorrect

Oxides & Oxo Anions of Cr Mn - Free MCQ Practice Test with solutions, NEET

MCQ Practice Test & Solutions: Test: Oxides & Oxo Anions of Cr & Mn (25 Questions)

Only One Option Correct Type
Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Q.
Which is most basic oxide of chromium?

The basic character of the transition metal monoxides follows the order
(Atomic Number, Ti = 22, V = 23, Cr = 24, Fe = 26)

MnO₄^- + S^2- + H⁺ → Mn²⁺ +S + H₂O When this equation is balanced, the total number of coefficients on the left hand side are

when this equation is balanced, the num ber of OH^- ions added

One mole of each KMnO₄ and K₂Cr₂O₇ can oxidise ........... moles of ferrous ion.

is of intense pink colour, though Mn is in (+7) oxidation state. It is due to

Which of the following is incorrect statement?

Pyrolusite in MnO₂ is used to prepare KMnO₄. Steps are
Here, I and II are

Which is the correct statem ent about structure?

Out of Cr (VI) as , which is better oxidising agent?

Amphoteric oxides in the following is/are

Which of the following on heating produce oxygen gas?

Which of the following statements is not true?

when this redox reaction is balanced in acidic medium, we get

Matching List Type
Direction (Q. Nos. 18 and 19) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.
Q.
Match the Column I with Column II and mark the correct option from the codes given below.

Match the Column I with Column II and mark the correct option from the codes given below.

One Integer Value Correct Type
Direction (Q. Nos. 20-23) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive
Q.
The number of moles of FeC₂O₄ that reduces two moles of KMnO₄ in acidic medium are

50 cc of 0.04 M K₂Cr₂O₇ in acidic medium oxidises a sample of H₂S gas to sulphur. Volume of 0.03 M KMnO₄ required to oxidise the same amount of H₂S gas to sulphur in acidic medium is 10 x x. Here, the value of x is

The number of sigma bonds in ion are

If molarity of K₂Cr₂O₇ solution is 0.5 M, its normality value is

Statement I : The oxidation state of chromium in the final product formed by the reaction between Kl and acidified potassium dichromate solution has green colour.
Statement II : The product has Cr³⁺ ions.

NCERT Based Tests for NEET

NCERT Based Tests for NEET

Top Courses for NEET

Schools

Competitive Exams

International Exams

Quick Links

About this NEET Practice Test

Explore more NEET Study Resources

Oxides & Oxo Anions of Cr Mn - Free MCQ Practice Test with solutions, NEET

MCQ Practice Test & Solutions: Test: Oxides & Oxo Anions of Cr & Mn (25 Questions)

Only One Option Correct TypeDirection (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which is most basic oxide of chromium?

The basic character of the transition metal monoxides follows the order(Atomic Number, Ti = 22, V = 23, Cr = 24, Fe = 26)

MnO4- + S2- + H+ → Mn2+ +S + H2O When this equation is balanced, the total number of coefficients on the left hand side are

when this equation is balanced, the num ber of OH- ions added

One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of ferrous ion.

is of intense pink colour, though Mn is in (+7) oxidation state. It is due to

Which of the following is incorrect statement?

Pyrolusite in MnO2 is used to prepare KMnO4. Steps areHere, I and II are

Which is the correct statem ent about structure?

Out of Cr (VI) as , which is better oxidising agent?

Amphoteric oxides in the following is/are

Which of the following on heating produce oxygen gas?

Which of the following statements is not true?

when this redox reaction is balanced in acidic medium, we get

Matching List TypeDirection (Q. Nos. 18 and 19) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.Q. Match the Column I with Column II and mark the correct option from the codes given below.

Match the Column I with Column II and mark the correct option from the codes given below.

One Integer Value Correct TypeDirection (Q. Nos. 20-23) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusiveQ. The number of moles of FeC2O4 that reduces two moles of KMnO4 in acidic medium are

50 cc of 0.04 M K2Cr2O7 in acidic medium oxidises a sample of H2S gas to sulphur. Volume of 0.03 M KMnO4 required to oxidise the same amount of H2S gas to sulphur in acidic medium is 10 x x. Here, the value of x is

The number of sigma bonds in ion are

If molarity of K2Cr2O7 solution is 0.5 M, its normality value is

Statement I : The oxidation state of chromium in the final product formed by the reaction between Kl and acidified potassium dichromate solution has green colour.Statement II : The product has Cr3+ ions.

NCERT Based Tests for NEET

NCERT Based Tests for NEET

Top Courses for NEET

About this NEET Practice Test

Explore more NEET Study Resources

Only One Option Correct Type
Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Q.
Which is most basic oxide of chromium?

The basic character of the transition metal monoxides follows the order
(Atomic Number, Ti = 22, V = 23, Cr = 24, Fe = 26)

MnO₄^- + S^2- + H⁺ → Mn²⁺ +S + H₂O When this equation is balanced, the total number of coefficients on the left hand side are

when this equation is balanced, the num ber of OH^- ions added

One mole of each KMnO₄ and K₂Cr₂O₇ can oxidise ........... moles of ferrous ion.

Pyrolusite in MnO₂ is used to prepare KMnO₄. Steps are
Here, I and II are

Matching List Type
Direction (Q. Nos. 18 and 19) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.
Q.
Match the Column I with Column II and mark the correct option from the codes given below.

One Integer Value Correct Type
Direction (Q. Nos. 20-23) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive
Q.
The number of moles of FeC₂O₄ that reduces two moles of KMnO₄ in acidic medium are

50 cc of 0.04 M K₂Cr₂O₇ in acidic medium oxidises a sample of H₂S gas to sulphur. Volume of 0.03 M KMnO₄ required to oxidise the same amount of H₂S gas to sulphur in acidic medium is 10 x x. Here, the value of x is

If molarity of K₂Cr₂O₇ solution is 0.5 M, its normality value is

Statement I : The oxidation state of chromium in the final product formed by the reaction between Kl and acidified potassium dichromate solution has green colour.
Statement II : The product has Cr³⁺ ions.