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Byju's Answer
Standard X
Chemistry
Basic Oxides of Metals
Metal oxides ...
Question

Metal oxides are _________ in nature.

A
basic
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B
acidic
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C
neutral
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D
none of these
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Solution

The correct option is C basic
Metal oxides are basic in nature because they react with water to form bases. Moreover, the oxides turn moist red litmus paper blue and blue remains blue.

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Q. A mixed oxide crystallizes in a cubic unit cell. Oxide ions are present in a ccp arrangement. Half of the tetrahedral voids are occupied by monovalent metal 'A' and the octahedral voids are fully occupied by a monovalent metal 'B'. The formula of the oxide is:
Q.

Name:

(a) two metals which are liquid at room temperature,

(b) metal which do not corrode easily

(c) a metal which lacks ductility,

(d) a non-metal which is lustrous,

(e) a non-metal which conducts electricity,

(f) a metal which is brittle,

(g) two elements which are monoatomic,

(h) two metallic oxides which are acidic,

(i) two metallic oxides which are amphoteric,

(j) two metallic which react with cold water,

(k) the compound responsible for green deposit on the surface of copper,

(l) a non-metal which can form a positive ion,

(m) a non-metal which shows reducing property,

(n) a metal whose oxide is reduced only by carbon.

Q. Name
(a) a metallic hydroxide soluble in excess of NH4OH.
(b) a metallic oxide soluble in excess of caustic soda solution.
(c) a strong alkali
(d) a weak alkali
(e) two coloured metal ions.
(f) two bases which are not alkalis but dissolve in strong alkalis.
(g) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
Q. Assertion :Basic oxides are metal oxides. Reason: A basic oxide is called so as it will produce a base if you put it in water.
Q. The cubic unit cell of a mixed oxide is composed of oxide ions in a ccp arrangement. One fourth of the tetrahedral voids are occupied by divalent metal 'A' and the octahedral voids are occupied by a monovalent metal 'B'. The formula of the oxide is:
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