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Acids with carbonates - class-XI

Description: acids with carbonates
Number of Questions: 26
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Tags: chemistry acids, bases and salts acids and bases acids and alkalis
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When marble chips are treated with $HCl $, which of the following gas is liberated?

  1. CO$ _2$

  2. O$ _2$

  3. CO

  4. NO$ _2$


Correct Option: A
Explanation:

Reaction:

$\underbrace{CaCO _3} _{(Marble\quad chips)} +2HCl\longrightarrow CaCl _2+CO _2(g) +H _2O(l)$
So, $CO _2$ gas is liberated.

$Ca(HCO _{3}) _{2} + 2HCl \rightarrow $

  1. $CaCl _{2} + 2H _{2}O + 2CO _{2}$

  2. $2CaCl _{2} + 2H _{2}O + 2CO _{2}$

  3. $CaCl _{2} + 4H _{2}O + 2CO _{2}$

  4. $CaCl _{2} + 2H _{2}O + 4CO _{2}$


Correct Option: A
Explanation:

$Ca(HCO _{3}) _{2} + 2HCl \rightarrow CaCl _{2} + 2H _{2}O + 2CO _{2}$ 

Metal carbonates react with  acids to give salt, carbon dioxide and water.

Acids react with carbonate and bicarbonates to liberate $CO _{2}$.

  1. True

  2. False


Correct Option: A
Explanation:

The metal ion displaces the proton $(H^+)$ from the acid and a salt is formed along with carbonic acid $(H _2CO _3)$

However, $(H _2CO _3)$ is unstable in atmospheric conditions.
$MgCO _3+2HCl\longrightarrow MgCl _2+H _2CO _3$ (Equation $01$)
$H _2CO _3\longrightarrow H _2O+CO _2$ (Equation $02$)
By adding $01$ and $02$
$MgCl _2+2HCl\longrightarrow MgCl _2+H _2O+CO _2$
Similarly,
$Na _2CO _3+H _2SO _4\longrightarrow Na _2SO _4+H _2CO _3$
here, $H _2CO _3$ is split into $H _2O+CO _2$
$ZnCO _3+2HNO _3\longrightarrow Zn(NO _3) _2+H _2O+CO _2$

Metal carbonates react with _______ to give salt, carbon dioxide and water.

  1. acids

  2. bases

  3. alkalis

  4. non-metals


Correct Option: A
Explanation:

Metal carbonates react with acids to give salt, carbon dioxide and water.
$NaHCO _{3} + 2HCl (dil) \rightarrow NaCl + H _{2}O + CO _{2(g)}$.

Choose the correct option to complete the reaction.
$CaCO _{3}(s) + 2HCl(aq) \rightarrow $

  1. $2CaCl _{2}(aq) + H _{2}O(l) + CO _{2}(g)$

  2. $CaCl _{2}(aq) + 3H _{2}O(l) + CO _{2}(g)$

  3. $2CaCl _{2}(aq) + 4H _{2}O(l) + CO _{2}(g)$

  4. $CaCl _{2}(aq) + H _{2}O(l) + CO _{2}(g)$


Correct Option: D
Explanation:

$CaCO _{3}(s) + 2HCl(aq) \rightarrow CaCl _{2}(aq) + H _{2}O(l) + CO _{2}(g)$ 

All metal carbonates and hydrogen carbonates react with acids to gives corresponding salt, carbon dioxide and water.

Hydrochloric acid react with carbonate to form:

  1. carbide

  2. hydride

  3. chloride

  4. none of the above


Correct Option: C
Explanation:

Chloride
Hydrochloric acid reacts with Carbonate to form chlorides.
$2HCl+CaCo _3\rightarrow CaCl _2+H _2O+CO _2$

$2HCl{(aq)} + MgCO _{3}(s)\rightarrow$

  1. $MgCl _{2}(aq) + CO _{2}(g) + H _{2}O(l)$

  2. $MgCl _{2}(aq) + CO _{2}(g)$

  3. $MgCl _{2}(aq) + H _{2}O(l)$

  4. $MgCl _{2}(aq) + CO _{2}(g) + 3H _{2}O(l)$


Correct Option: A
Explanation:

$(A)$  $MgCl _{2}(aq)$ + $CO _{2}(g)$ + $H _{2}O(l)$


$Reaction$ : $2HCl(aq)$ + $MgCO _{3}(s)$ $\rightarrow$ $MgCl _{2}(aq)$ + $CO _{2}(g)$ + $H _{2}O(l)$

_________ causes bubble formation when acid reacts with carbonates.

  1. Salt

  2. $CO _{2}$

  3. Water

  4. Oxygen


Correct Option: B
Explanation:

When acids react with carbonates, such as calcium carbonate (found in chalk, limestone and marble) a salt, water and carbon dioxide are made. Carbon dioxide is formed as by product which causes bubbling during the reaction and can be detected using limewater.
$Acid + Metal\ carbonate \rightarrow Salt + Water + Carbon\ dioxide$

$H {2}SO _{4} + CuCO _{3} \rightarrow$ ___ $ + H _{2}O + CO _{2}$

  1. $CuSO _{4}$

  2. $CuSO _{3}$

  3. $CuSO _{2}$

  4. None of above


Correct Option: A
Explanation:

All carbonates react with acids to produce salt, water and carbon dioxide gas. 
$H _{2}SO _{4} + CuCO _{3} \rightarrow CuSO _{4} + H _{2}O + CO _{2}$

What is formed when acids react with carbonates?

  1. Salt

  2. Water

  3. Carbon dioxide

  4. All of above


Correct Option: D
Explanation:

When acids react with carbonates, such as calcium carbonate (found in chalk, limestone and marble), a salt, water and carbon dioxide are made. In general:
$Acid + Metal\ carbonate \rightarrow Salt + Water + Carbon\ dioxide$

What does an acid give when they react with metal hydrogen carbonate?

  1. $C{O} _{2}$

  2. ${H} _{2}O$

  3. Salt

  4. All of above


Correct Option: D
Explanation:

Acids give carbon dioxide gas, respective salt and water when they react with metal hydrogen carbonate.
Acid $+$ Metal hydrogen carbonate $\rightarrow$ Salt $+$ Carbon dioxide $+$ Water.

Why does baking soda and vinegar react with each other?

  1. Undergo acid base reaction

  2. Exchange atoms

  3. Both $(A)$ and $(B)$

  4. High temperature


Correct Option: C
Explanation:

Baking soda and vinegar react with each other because of an acid-base reaction. Baking soda is a bicarbonate $(NaHCO _{3})$ and vinegar is an acetic acid $(HCH _{3}COO)$. One of the products this reaction creates is carbon dioxide. Also Baking soda and vinegar react with each other because they exchange atoms. In this case, they are exchange a proton, which is a subatomic particle that makes atoms.

When sulphuric acid reacts with calcium carbonate, ________ is formed.

  1. calcium sulphate

  2. calcium

  3. calcium hydroxide

  4. hydrogen gas


Correct Option: A
Explanation:

Sulphuric acid gives calcium sulphate, carbon dioxide gas and water when it reacts with calcium carbonate.
$CaC{O} _{3}   +   {H} _{2}S{O} _{4}   \rightarrow   CaS{O} _{4}   +   C{O} _{2}   +   {H} _{2}O$.

Why do the gas released when metal bicarbonates react with acid turns lime water milky?

  1. Formation of calcium hydrogen carbonate

  2. Precipitation of calcium hydrogen carbonate

  3. Formation of white calcium carbonate precipitate

  4. None of above


Correct Option: C
Explanation:

When metal bicarbonates react with acid liberates carbon dioxide The gas evolved because of reaction of acid with metal carbonate or metal hydrogen carbonate turns lime water milky. This shows that the gas is carbon dioxide gas. This happens because of formation of white precipitate of calcium carbonate.
$Ca{\left(OH\right)} _{2}  + C{O} _{2}    \Rightarrow   CaC{O} _{3}  +  {H} _{2}O$.

$HCl  +  NaHC{O} _{3}\rightarrow$
The given reaction releases which of the following gas?

  1. ${O} _{2}$

  2. $C{O} _{2}$

  3. ${H} _{2}$

  4. ${Cl} _{2}$


Correct Option: B
Explanation:

Acids react with metal hydrogen carbonates and form corresponding salts, carbon dioxide and water. 
Example:
Hydrochloric acid on reaction with sodium bicarbonate forms sodium chloride, carbon dioxide and water.
$HCl  +  NaHC{O} _{3}  \rightarrow   NaCl  +  C{O} _{2}  +  {H} _{2}O$.

Acid rain causes damage to the historical monuments like Taj Mahal. Why?

  1. Marble is made up of calcium carbonate

  2. Marble is made up of calcium hydroxide

  3. Marbles are made up of metal oxides

  4. None of above


Correct Option: A
Explanation:

Acid rain causes damage to the historical monuments and other buildings. For example Taj Mahal, which is made of marble, is getting damaged because of reaction with acid rain. Marble is calcium carbonate which reacts with the acid and thus gets corroded.

Sodium hydrogen carbonate is commonly called as:

  1. sodium bicarbonate

  2. sodium carbonate

  3. both $A$ and $B$

  4. none of above


Correct Option: A
Explanation:

Sodium bicarbonate is also known as sodium hydrogen carbonate, baking soda, baking powder, bread soda and bicarbonate of soda.

What is used with acid in fire extinguisher to produce carbon dioxide gas?

  1. Metal oxide

  2. Metal hydrogen carbonate

  3. Metallic acid

  4. Base


Correct Option: B
Explanation:

Metal carbonate or metal hydrogen carbonate and acid are used in fire extinguisher to produce carbon dioxide gas. Acid and metal carbonate or bicarbonate are kept in separate chambers in a fire extinguisher. On emergency, they are allowed to react with one another. The carbon dioxide gas so produced is poured over fire. As carbon dioxide does not support burning, it puts off the fire.

Why there is not much fizz when sulphuric acid and calcium carbonate react with each other?

  1. Salt formed is completely soluble

  2. Salt is not formed at all

  3. Salt formed is not very soluble

  4. $CO _2$ is not formed


Correct Option: C
Explanation:

Using sulphuric acid and calcium carbonate, you don't get much of a fizz because the calcium sulphate salt formed, is not very soluble, and coats the remaining calcium carbonate inhibiting the reaction. This will happen with any reaction between an acid and a water insoluble reactant which forms an insoluble solid product.

The gas released when $NaHCO _3$ reacts with $HNO _3$ will:

  1. turn lime water milky

  2. release effervescence

  3. both $A$ and $B$

  4. burns with a pop sound


Correct Option: C
Explanation:

On adding a hydrogen carbonate to an acid, effervescence from carbon dioxide gas is released along with the formation of water and salt. $CO _2$ turns lime water milky.
$ NaHCO _3 + HNO _3 \rightarrow NaNO _3 + H _2O + CO _2 $

$ 2H _3PO _4 + 3Na _2CO _3 \rightarrow $
What are the products formed?

  1. $2NaPO _4 + 3H _2O + 3CO _2$

  2. $2Na _3PO _4 + 3H _2O + 3CO _2$

  3. $2Na _3PO _4 + H _2O + 3CO _2$

  4. $2Na _3PO _3 + 3H _2O + 3CO _2$


Correct Option: B
Explanation:

On adding a carbonate to an acid, effervescence from carbon dioxide gas is released along with the formation of water and salt. $CO _2$ turns lime water milky.
Phosphoric acid + sodium carbonate $\rightarrow$ sodium phosphate + water + carbon dioxide
$ 2H _3PO _4 + 3Na _2CO _3 \rightarrow 2Na _3PO _4 + 3H _2O + 3CO _2 $

A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains:

  1. $NaCl$

  2. $HCl$

  3. $LiCl$

  4. $KCl$


Correct Option: B
Explanation:

Crushed egg shell has composition $CaCO _3$ reacts with acid and gives gas $CO _2$ which turns lime water $(Ca(OH) _2)$ milky by producing $CaCO _3$ again. The acid in given options is $HCl$. 

$CaCO _3 + 2HCl \rightarrow CaCl _2 + CO _2 + H _2O $
$Ca(OH) _2 + CO _2 \rightarrow CaCO _3 + H _2O$

Which of the following represents the products obtained when, $HCl$ reacts with sodium hydrogen carbonate?

  1. $NaCl$, $H _2O$ and $CO _2$

  2. $NaCl$ and $CO _2$

  3. $NaOH$ and $CO _2$

  4. $NaOH$, $H _2O $ and $CO _2$


Correct Option: A
Explanation:

When $HCl$ reacts with sodium hydrogen carbonate, the products obtained are $NaCl,$ $H _2O$ and $CO _2$.
$\displaystyle NaHCO _3 + HCl \rightarrow NaCl + H _2O + CO _2$

Which of the following represents the products obtained when $HCl$ reacts with calcium carbonate?

  1. $CaCl _2$, $H _2O$ and $CO _2$

  2. $CaCl _2$ and $CO _2$

  3. $Ca(OH) _2$ and $CO _2$

  4. $Ca(OH) _2$, $H _2O $ and $CO _2$


Correct Option: A
Explanation:

When $HCl$ reacts with calcium carbonate, the products obtained are $CaCl _2$, $H _2O$ and $CO _2$.
$\displaystyle CaCO _3 + 2HCl \rightarrow CaCl _2 + H _2O + CO _2$

When an acid reacts with a metal carbonate or metal hydrogen carbonate, it gives the corresponding salt, gas and product. Name the gas and product?

  1. Carbon dioxide, Water

  2. Carbon dioxide, Salt

  3. Hydrogen, Salt

  4. All of the above


Correct Option: A
Explanation:

Acid + Metal carbonate  $\longrightarrow$ Salt + Water + Carbon dioxide

CaCO$ _3$ (calcium carbonate-metal carbonate) + 2HCl $\longrightarrow$ CaCl$ _2$ (calcium chloride-salt) + H$ _2$O + CO$ _2$

Choose the correct answer form the alternatives given.
The chemical name of baking soda is

  1. Sodium carbonate

  2. Sodium bicarbonate

  3. Sodium chloride

  4. Sodium nitrate


Correct Option: B
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