Tag: chemistry

Questions Related to chemistry

The principal products obtained on heating iodine with concentrated caustic soda solution is:

chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

  1. $NaIO\, +\, NaI$

  2. $NaIO\, +\, NaIO _3$

  3. $NaIO _3\, +\, NaI +\ H _2O$

  4. $NaIO _4\, +\, NaI$

Show answer
Correct Option: C
Explanation:

On adding iodine to caustic soda(alkali), hypoiodites are formed and the peculiar smell is of iodoform and pale yellow in color.

$6NaOH + 3I _2 \longrightarrow NaIO _3 +5NaI +3H _2O$

Metallic oxides react with ............ to give salts and water, similar to the reaction of a/an ........... with an acid, metallic oxides are said to be basic oxides.

chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

  1. bases, base

  2. acids, base

  3. acids, acid

  4. bases, acids

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Correct Option: B
Explanation:

Metallic oxides react with acids to give salts and water, similar to the reaction of a base with an acid, metallic oxides are said to be basic oxides.

Choose the correct answer from the given option.
$Metal\ oxide + Acid \rightarrow $

chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

  1. $Salt + Water$

  2. $Sweet + Water$

  3. $Light + Water$

  4. $Gas + Water$

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Correct Option: A
Explanation:

The general reaction between a metal oxide and an acid can be written as : 

$Metal\ oxide + Acid \rightarrow Salt + Water$

'The blue-green colour of the solution is due to the formation of copper(II) chloride in the reaction' is an example of which kind of chemical reaction?

chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

  1. Reaction of metallic oxides with acids

  2. Reaction of non-metallic oxides with acids

  3. Reaction of metallic oxides with bases

  4. Reaction of non-metallic oxides with base

Show answer
Correct Option: A
Explanation:

Metal oxides always reacts with acid to form salt and water. Copper oxide when reacts with $HCl$ it forms blue-green copper(II) chloride. 

$2CuO + 2HCl \rightarrow 2CuCl _2 + H _2O$

The __________ oxides can be neutralized with a base to form a salt and water.

chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

  1. metal

  2. non-metal

  3. Both of the above

  4. None of the above

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Correct Option: B
Explanation:

The non-metal oxides can be neutralized with a base to form a salt and water.

Which of these is not a non-metallic oxide?

chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

  1. $SO _2$

  2. $N _2O _5$

  3. $P _4O _{10}$

  4. $H _2SO _4$

Show answer
Correct Option: D
Explanation:

Sulphur, nitrogen and phosphorus are non-metals and form non-metallic oxides. $H _2SO _4$ is an acid. 

Sulphuric acid reacts with cupric oxide to give:

chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

  1. copper sulphate

  2. cuprous sulphate

  3. no reaction

  4. it converts to cuprous oxide.

Show answer
Correct Option: A
Explanation:

$H _2SO _4 + CuO \rightarrow CuSO _4 + H _2O$


Sulphuric acid reacts with cupric oxide to give copper sulphate and water. 

Hence, the correct option is $\text{A}$

Which of these is a non-metallic oxide which reacts with base to form salt and water?

chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

  1. Carbon dioxide

  2. Carbon monoxide

  3. Both A and B

  4. None of these

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Correct Option: A
Explanation:

Only carbondioxide reacts with base to form salt and water. Carbon monoxide does not give this reaction. 

The oxide that can form salt and water with a base as well as with an acid is :

chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

  1. carbon monoxide

  2. sulphur dioxide

  3. sodium Oxide

  4. aluminium oxide

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Correct Option: D
Explanation:

Aluminium oxide is an amphoteric oxide. It can react with both with an acid and a base to form salt and water. 

The reaction between copper oxide and nitric acid forms:

chemistry chemistry in everyday life metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

  1. copper nitrate and hydrogen

  2. copper nitrite and water

  3. copper nitrite and hydrogen

  4. copper nitrate and water

Show answer
Correct Option: D
Explanation:

$CuO + 2HNO _3 \rightarrow Cu(NO _3) _2 + H _2O$

Copper oxide and nitric acid react to give copper nitrate and water.