Tag: properties of acids and bases

Questions Related to properties of acids and bases

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

chemistry acids and alkalis acids with carbonates reactions of acids and bases properties of acids and bases

  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

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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:

chemistry acids and alkalis acids with carbonates reactions of acids and bases properties of acids and bases

  1. sodium bicarbonate

  2. sodium carbonate

  3. both $A$ and $B$

  4. none of above

Show answer
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?

chemistry acids and alkalis acids with carbonates reactions of acids and bases properties of acids and bases

  1. Metal oxide

  2. Metal hydrogen carbonate

  3. Metallic acid

  4. Base

Show answer
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?

chemistry acids and alkalis acids with carbonates reactions of acids and bases properties of acids and bases

  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

Show answer
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:

chemistry acids and alkalis acids with carbonates reactions of acids and bases properties of acids and bases

  1. turn lime water milky

  2. release effervescence

  3. both $A$ and $B$

  4. burns with a pop sound

Show answer
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?

chemistry acids and alkalis acids with carbonates reactions of acids and bases properties of acids and bases

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

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

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

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

Show answer
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:

chemistry acids and alkalis acids with carbonates reactions of acids and bases properties of acids and bases

  1. $NaCl$

  2. $HCl$

  3. $LiCl$

  4. $KCl$

Show answer
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?

chemistry acids and alkalis acids with carbonates reactions of acids and bases properties of acids and bases

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

  2. $NaCl$ and $CO _2$

  3. $NaOH$ and $CO _2$

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

Show answer
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?

chemistry acids and alkalis acids with carbonates reactions of acids and bases properties of acids and bases

  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 $CO _2$

Show answer
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?

chemistry acids and alkalis acids with carbonates reactions of acids and bases properties of acids and bases

  1. Carbon dioxide, Water

  2. Carbon dioxide, Salt

  3. Hydrogen, Salt

  4. All of the above

Show answer
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$