Acids Bases and Salts Test

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Acids Bases and Salts Test - 21

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Weekly Quiz Competition

Question 1
1 / -0

Common salt besides being used in kitchen can also be used as the raw material for making

(i) washing soda

(ii) bleaching powder

(iii) baking soda

(iv) slaked lime

A
(i) ,(ii) and (iii)

B
(i), (ii) and (iv)

C
(i) and (iii)

D
(i), (iii) and (iv)

Solution

Common salt (sodium chloride) is used as a raw material for manufacturing of sodium hydroxide, washing soda, bleaching powder, baking soda, hydrochloric acid, chlorine, etc.
Question 2
1 / -0

One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is

A
Hydrochloric acid

B
Tartaric acid

C
Acetic acid

D
Sulphuric acid

Solution

A mild edible acid is used along with sodium hydrogen carbonate to make baking soda. Usually, tartaric acid is used but acetic acid or citric acid can also be used.

$NaHCO_3+C_4H_6O_6\rightarrow CO_2+H_2O+Na_2C_4H_4O_6$
Question 3
1 / -0

To protect tooth decay we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is

A
Acidic

B
Neutral

C
Basic

D
Corrosive

Solution

Basic toothpaste neutralizes any acid which may be present on teeth. Acid comes because of bacterial activity in mouth.
Question 4
1 / -0

Which of the following statements is correct about an aqueous solution of an acid and of a base?

(i) Higher the pH, stronger the acid

(ii) Higher the pH, weaker the acid

(iii) Lower the pH, stronger the base

(iv) Lower the pH, weaker the base

A
(i) and (iii)

B
(ii) and (iii)

C
(i) and (iv)

D
(ii) and (iv)

Solution

pH of acids is below 7 and as we go down the pH scale, acids become stronger. When we go up the pH scale beyond 7, bases become stronger.
Question 5
1 / -0

The pH of the gastric juices released during digestion is

A
Less than 7

B
More than 7

C
Equal to 7

D
Equal to 0

Solution

The pH must be less than 7, so the juices are more gastric and can easily breakdown food into simpler molecules. Usually, the pH is 3.0.
Question 6
1 / -0

Which of the following phenomena occur, when a small amount of acid is added to water?

(i) Ionisation

(ii) Neutralisation

(iii) Dilution

(iv) Salt formation

A
(i) and (ii)

B
(i) and (iii)

C
(ii) and (iii)

D
(ii) and (iv)

Solution

No base is being added, so (ii) and (iii) cannot happen. When acid is dissolved in water, it breaks into its ions.
Question 7
1 / -0

Which one of the following can be used as an acid–base indicator by a visually impaired student?

A
Litmus

B
Turmeric

C
Vanilla essence

D
Petunia leaves

Solution

Vanilla works as olfactory indicator, hence it can be used by visually impaired student.
Question 8
1 / -0

Which of the following substance will not give carbon dioxide on treatment with dilute acid?

A
Marble

B
Limestone

C
Baking soda

D
Lime

Solution

Other options show carbonate or hydrogen carbonate. Hence, they will give carbon dioxide on reaction with acid. But lime contains hydroxide and hence will not give carbon dioxide on reaction with acid.
Question 9
1 / -0

Which of the following is acidic in nature?

A
Lime juice

B
Human blood

C
Lime water

D
Antacid

Solution

Lime juice contains citric acid.
Question 10
1 / -0

Which of the following is used for dissolution of gold?

A
Hydrochloric acid

B
Sulphuric acid

C
Nitric acid

D
Aqua regia

Solution

Gold is a noble metal and does not react with even concentrated acids. Aqua regia is made by mixing nitric acid and hydrochloric acid in 1:3 ratio. It can dissolve even gold and platinum.
Question 11
1 / -0

Which of the following is not a mineral acid?

A
Hydrochloric acid

B
Citric acid

C
Sulphuric acid

D
Nitric acid

Solution

It is an organic acid.
Question 12
1 / -0

Which among the following is not a base?

A
$NaOH$

B
$KOH$

C
$NH_4OH$

D
$C_2H_5OH$

Solution

$C_2H_5OH\rightarrow$ It is an alcohol(ethanol), an organic compound.
Question 13
1 / -0

Which of the following statements is not correct?

A
All metal carbonates react with acid to give a salt, water and carbon dioxide

B
All metal oxides react with water to give salt and acid

C
Some metals react with acids to give salt and hydrogen

D
Some non-metal oxides react with water to form an acid

Solution

Metal oxides are basic in nature. They give alkaline solution when dissolved in water.

Question 14

1 / -0

Match the chemical substances given in Column (A) with their appropriate application given in Column (B)

	Column(A)	Column(B)
(A)	Bleaching powder	(i) Preparation of glass
(B)	Baking soda	(ii) production of $H_2$ and $Cl_2$
(C)	Washing soda	(iii) Decolourisation
(D)	Sodium chloride	(iv) Antacid

A—(ii), B—(i), C—(iv), D—(iii)

A—(iii), B—(ii), C—(iv), D—(i)

A—(iii), B—(iv), C—(i), D—(ii)

A—(ii), B—(iv), C—(i), D—(iii)

Solution

Bleaching powder has got its name because of bleaching (decolourizing) property. Baking soda is used as antacid (as common household remedy). Sodium chloride (common salt) is used for making various chemicals through chloralkali process.

Question 15
1 / -0

Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained? (You may use colour guide given in Figure)

A
Red

B
Yellow

C
Yellowish green

D
Blue

Solution

Neutralisation reaction takes place when hydrochloric acid and sodium hydroxide are mixed
Question 16
1 / -0

Which of the following is(are) true when HCl (g) is passed through water?

(i) It does not ionise in the solution as it is a covalent compound.

(ii) It ionises in the solution.

(iii) It gives both hydrogen and hydroxyl ion in the solution.

(iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule

A
(i) only

B
(iii) only

C
(ii) and (iv)

D
(iii) and (iv)

Solution

Any acid produces hydrogen ion $(H^+)$ which is present as hydronium ion $(H_3O^+)$ because of combination with water molecule
Question 17
1 / -0

Which of the following statements is true for acids?

A
Bitter and change red litmus to blue

B
Sour and change red litmus to blue

C
Sour and change blue litmus to red

D
Bitter and change blue litmus to red

Solution

Sour( The word acid is derived from latin ACIDUS/ACERE which means sour) and change blue litmus to red
Question 18
1 / -0

Which of the following are present in a dilute aqueous solution of hydrochloric acid?

A
$H_3O^++Cl^-$

B
$H_3O^++OH^-$

C
$Cl^-+OH^-$

D
$unionised\, HCl$

Solution

Any acid produces hydrogen ion $(H^+)$ which is present as hydronium ion $(H_3O^+)$ because of combination with water molecule.
Question 19
1 / -0

Identify the correct representation of reaction occurring during chloralkali process

A
$2NaCl(l)+2H_2O(l)\rightarrow 2NaOH(l)+Cl_2(g)+H_2(g)$

B
$2NaCl(aq)+2H_2O(aq)\rightarrow 2NaOH(aq)+Cl_2(g)+H_2(g)$

C
$2NaCl(aq)+2H_2O(l)\rightarrow 2NaOH(aq)+Cl_2(aq)+H_2(aq)$

D
$2NaCl(aq)+2H_2O(l)\rightarrow 2NaOH(aq)+Cl_2(g)+H_2(g)$

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Re-Attempt Weekly Quiz Competition

Acids Bases and Salts Test - 21

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Acids Bases and Salts Test - 21

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SHARING IS CARING

Question 1

(i) ,(ii) and (iii)

(i), (ii) and (iv)

(i) and (iii)

(i), (iii) and (iv)

Solution

Question 2

Hydrochloric acid

Tartaric acid

Acetic acid

Sulphuric acid

Solution

Question 3

Acidic

Neutral

Basic

Corrosive

Solution

Question 4

(i) and (iii)

(ii) and (iii)

(i) and (iv)

(ii) and (iv)

Solution

Question 5

Less than 7

More than 7

Equal to 7

Equal to 0

Solution

Question 6

(i) and (ii)

(i) and (iii)

(ii) and (iii)

(ii) and (iv)

Solution

Question 7

Litmus

Turmeric

Vanilla essence

Petunia leaves

Solution

Question 8

Marble

Limestone

Baking soda

Lime

Solution

Question 9

Lime juice

Human blood

Lime water

Antacid

Solution

Question 10

Hydrochloric acid

Sulphuric acid

Nitric acid

Aqua regia

Solution

Question 11

Hydrochloric acid

Citric acid

Sulphuric acid

Nitric acid

Solution

Question 12

NaOHNaOH

KOHKOH

NH4OHNH_4OH

C2H5OHC_2H_5OH

Solution

$NaOH$

$KOH$

$NH_4OH$

$C_2H_5OH$

$H_3O^++Cl^-$

$H_3O^++OH^-$

$Cl^-+OH^-$

$unionised\, HCl$

$2NaCl(l)+2H_2O(l)\rightarrow 2NaOH(l)+Cl_2(g)+H_2(g)$

$2NaCl(aq)+2H_2O(aq)\rightarrow 2NaOH(aq)+Cl_2(g)+H_2(g)$

$2NaCl(aq)+2H_2O(l)\rightarrow 2NaOH(aq)+Cl_2(aq)+H_2(aq)$

$2NaCl(aq)+2H_2O(l)\rightarrow 2NaOH(aq)+Cl_2(g)+H_2(g)$