Acids, Bases And Salts Test

Result

Acids, Bases And Salts Test - 1

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1

1 / -0

In the table given below, match the bases in the first column with their applications mentioned in the second column.

(A) Calcium hydroxide	(i) Antacid
(B) Ammonium hydroxide	(ii) Soap
(C) Sodium hydroxide	(iii) Whitewash
(D) Magnesium hydroxide	(iv) Window cleaner

(A) - (ii), (B) - (i), (C) - (iv), (D) - (iii)

(A) - (iii), (B) - (ii), (C) - (iv), (D) - (i)

(A) - (ii), (B) - (iv), (C) - (iii), (D) - (i)

(A) - (iii), (B) - (iv), (C) - (ii), (D) - (i)

Solution

(A) Calcium hydroxide (Limewater)	(iii) Whitewash
(B) Ammonium hydroxide	(iv) Window cleaner
(C) Sodium hydroxide	(ii) Soap
(D) Magnesium hydroxide (Milk of magnesia)	(i) Antacid

Question 2
1 / -0

The solution of a strong acid is mixed with an equal amount of a solution of a strong base. The resultant mixture is then tested with a neutral litmus paper. What will be the colour change observed in the litmus paper?

A
Red

B
Blue

C
Colourless

D
Purple

Solution

The resultant mixture will be the solution of a neutral salt in water.

Neutral litmus paper, if used, turns purple in a neutral solution.

However, if red or blue litmus paper is used, they show no change in a neutral solution.
Question 3
1 / -0

If pH of a solution is 1.5, then what is the nature of the solution?

A
Highly basic

B
Weakly basic

C
Highly acidic

D
Weakly acidic

Solution

The acidic character increases as the pH value decreases from 7 to 0. Thus, the solution having pH value of 1.5 is highly acidic.
Question 4
1 / -0

In which of the following solutions will a strip of cloth, soaked in onion juice, lose its odour when added to it?

A
Conc. HCl

B
Dil. NaOH

C
Conc. H₂SO₄

D
Dil. HNO₃

Solution

Onion is an olfactory indicator, which loses its odour in the basic media.
Thus, when added to the dil. solution of sodium hydroxide, the strip of a cloth soaked in onion juice will lose its odour.
Question 5
1 / -0

Which of the following oxides, when dissolved in water, gives a solution which turns blue litmus red?

A
MgO

B
CaO

C
CO₂

D
CuO

Solution

CO₂ is an acidic oxide and dissolves in water to form carbonic acid.

Hence, its solution in water will turn the blue litmus red.
Question 6
1 / -0

Which of the following statements are correct about an aqueous solution of an acid or a base having equal concentrations?

(i) Higher the pH, stronger the acid. (For pH < 7)
(ii) Higher the pH, weaker the acid. (For pH <7)
(iii) Lower the pH, stronger the base. (For pH > 7)
(iv) Lower the pH, weaker the base. (For pH > 7)

A
(i) and (iii) only

B
(ii) and (iii) only

C
(i) and (iv) only

D
(ii) and (iv) only

Solution

For pH < 7, higher value of pH indicates a lower concentration of H⁺ ions. Hence, the higher the pH, the weaker the acid.

For pH > 7, lower value of pH indicates a higher concentration of H⁺ ions and lower concentration of OH^- ions. Hence, the lower the pH, the weaker the base.
Question 7
1 / -0

The correctly matched pairs are:

I. Caustic soda - Sodium thiosulphate
II. Lime - Sodium hydroxide
III. Washing soda - Sodium carbonate
IV. Baking soda - Sodium bicarbonate

A
I, II and III

B
III and IV

C
II and III

D
I and II

Solution

The correct match for the common names of the mentioned substances with their chemical names is:

I. Caustic soda - Sodium hydroxide
II. Lime - Calcium oxide
III. Washing soda - Sodium carbonate
IV. Baking soda - Sodium bicarbonate
Question 8
1 / -0

Read the following passage and select the option that correctly fills the blanks in the given statements.

Milk is slightly acidic because it contains __(i)__, which is a __(ii)__ ion donor. When milk turns sour, __(iii)__ is converted to __(i)__. During summer, the milkman adds __(iv)__ to the milk, which makes it slightly __(v)__ and delays the process of souring of the milk.

A
hydrogen - (i), lactic acid - (ii), lactose sugar - (iii), sodium bicarbonate - (iv), basic - (v)

B
lactic acid - (i), hydrogen - (ii), sodium bicarbonate - (iii), lactose sugar - (iv), basic - (v)

C
lactic acid - (i), hydrogen - (ii), lactose sugar - (iii), sodium bicarbonate - (iv), basic - (v)

D
lactose sugar - (i), lactic acid - (ii), hydrogen - (iii), lactose sugar - (iv), sodium bicarbonate - (v)

Solution

Unsoured milk has lactose sugar and a small amount of lactic acid, which is a hydrogen ion donor. That is why, the pH of milk is 6.5 to 6.7, which makes it slightly acidic.
When milk turns sour, the lactose sugar is converted to lactic acid.

However, addition of a base like NaHCO₃ delays the souring of milk.
Question 9
1 / -0

Lactic acid is present in which of the following food items?

A
Grapes

B
Amla

C
Curd

D
Vinegar

Solution

All sour substances are acidic.
The following table shows the correct match between the given substances and the acid contained in them.

1. Grapes Tartaric acid

2. Amla Ascorbic acid

3. Curd Lactic acid

4. Vinegar Acetic acid

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

1. Grapes	Tartaric acid
2. Amla	Ascorbic acid
3. Curd	Lactic acid
4. Vinegar	Acetic acid

Acids, Bases And Salts Test - 1

Result

Acids, Bases And Salts Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

(A) - (ii), (B) - (i), (C) - (iv), (D) - (iii)

(A) - (iii), (B) - (ii), (C) - (iv), (D) - (i)

(A) - (ii), (B) - (iv), (C) - (iii), (D) - (i)

(A) - (iii), (B) - (iv), (C) - (ii), (D) - (i)

Solution

Question 2

Red

Blue

Colourless

Purple

Solution

Question 3

Highly basic

Weakly basic

Highly acidic

Weakly acidic

Solution

Question 4

Conc. HCl

Dil. NaOH

Conc. H2SO4

Dil. HNO3

Solution

Question 5

MgO

CaO

CO2

CuO

Solution

Question 6

(i) and (iii) only

(ii) and (iii) only

(i) and (iv) only

(ii) and (iv) only

Solution

Question 7

I, II and III

III and IV

II and III

I and II

Solution

Question 8

hydrogen - (i), lactic acid - (ii), lactose sugar - (iii), sodium bicarbonate - (iv), basic - (v)

lactic acid - (i), hydrogen - (ii), sodium bicarbonate - (iii), lactose sugar - (iv), basic - (v)

lactic acid - (i), hydrogen - (ii), lactose sugar - (iii), sodium bicarbonate - (iv), basic - (v)

lactose sugar - (i), lactic acid - (ii), hydrogen - (iii), lactose sugar - (iv), sodium bicarbonate - (v)

Solution

Question 9

Grapes

Amla

Curd

Vinegar

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

Conc. H₂SO₄

Dil. HNO₃

CO₂