Test: Oxides & Oxo Anions of Cr & Mn - NEET MCQ
25 Questions MCQ Test - Test: Oxides & Oxo Anions of Cr & Mn
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)
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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 OF- 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?
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?
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
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 reacts with both acids and bases?
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?
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
ion are
If molarity of K2Cr2O7 solution is 0.5 M, its normality value is
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.
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.
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