Assertion: `MnO` is basic whereas `Mn_2O_7` is acidic. Reason: Higher the oxidation state of a transition metal in its oxide, greater is the acidic ch

Monjur Alahi

Assertion: `MnO` is basic whereas `Mn_2O_7` is acidic.
Reason: Higher the oxidation state of a transition metal in its oxide, greater is the acidic character.
A. If both assetion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are ture but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

Correct Answer - A
Reason is the correct explanatin is assertion.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
Heating of which of the following compounds gives acidic and basic oxide ?  A) Pb(NO3)2

Correct option is C) CaCO3 

2 Answers 1 views
i. Identify the element that exhibits only negative oxidation state.  ii. Identify the element that exhibits only positive oxidation state. 

i. F: It is most electronegative. It shows only a negative oxidation state of -1. ii. Cs: Alkali metals have only one electron in their valence shell and hence, exhibits only positive...

2 Answers 1 views
Explain the terms: i. Valency of an element  ii. Oxidation state (or oxidation number)  iii. Chemical reactivity

i. Valency of an element: Valency of an element indicates the number of chemical bonds that the atom can form giving a molecule. The most fundamental chemical property of an element is...

2 Answers 1 views
1. (a) Is ammonia more dense or less dense than air? (b) What property of ammonia is demonstrated by the Fountain Experiment? (c) Write the balanced equation for the reaction between ammonia and sulphuric acid. 2. Pick the odd member from the list giving reasons: (a) Ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide. (b) Copper oxide, aluminium oxide, sodium oxide, magnesium oxide. 3. Give reasons for the following : (a) Liquid ammonia is used as a refrigerant in ice plants. (b) Aqueous solution of ammonia is used for removing grease stains from woollen clothes. (c) Aqueous solution of ammonia gives a pungent smell. (d) Aqueous solution of ammonia conducts electricity.

(1) (a) ammonia is less dense than air (b) solubility in water (c) 2NH3 + H2SO4 → (NH4)2SO4 (2) (a) Ammonia → because - NH3 is basic while, SO2,HCl and CO2 are acidic oxides. (b) CuO,...

2 Answers 1 views
Match the complex with its oxidation state of central metal `{:(" Column I"," Column II"),("(A) Chromyl chloride test","(p) "S^(2-)),("(B) Ring test",

Correct Answer - A(s), B(q), C(r), D(p)

2 Answers 1 views
Why is the highest oxidation state of a metal exhibited in its oxide or fluoride only?

Oxygen and fluorine have small size and high electronegativity, so they can easily oxidise the metal to its highest oxidation state.

2 Answers 1 views
Assertion (A) : Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide . Reason (R) : Beryllium carbonate is unstab

Correct Answer - A Both A and R are correct and R is the corret explanation of A .

2 Answers 1 views
Assertion `(A): beta-` particles have greater penetrating power than `alpha-` rays but less than `gamma-`rays. Reason `(R) : beta-` particles are ligh

Correct Answer - A Refer Section

2 Answers 1 views
A simole oxide of carbon and that another non-metal have the same Cp/Cv ratio but a difference of 2 in their molecular weights. The other non-metal co

`N_2` is less reactive at room temperature due to presence of triple bond between two N atoms `NcongN` Hence bond Dissociation energy `N_2` is bery high.

2 Answers 1 views
In the oxidation reactions of `KMnO_(4)` , in acidic medium, only `H_(2)SO_(4)` is used to produce acidic medium but not HCl(or ) `HNO_(3)` because

Correct Answer - A HCl reacts with `KMnO_(4)` and produce `Cl_(2) . HNO_(3)` acts as oxidising agent.

2 Answers 1 views
X