Acids Bases and Salts Test

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Acids Bases and Salts Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

The acid having highest hydrogen ion concentration is one with

A
pH = 2.5

B
pH = 1.8

C
pH = 7

D
pH = 10
Question 2
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
Question 3
1 / -0

If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?

A
Wash the hand with saline solution

B
Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate.

C
After washing with plenty of water, apply solution of sodium hydroxide on the hand.

D
Neutralise the acid with a strong alkali.
Question 4
1 / -0

Sodium hydrogencarbonate when added to acetic acid evolves a gas. Which of the following statements is true about the gas evolved?

(i) It turns lime water milky.

(ii) It extinguishes a burning splinter.

(iii) It dissolves in a solution of sodium hydroxide.

(iv) It has a pungent odour.

A
(i) and (ii)

B
(i), (ii) and (iii)

C
(ii), (iii) and (iv)

D
(i) and (iv)
Question 5
1 / -0

Which solution will change blue litmus to red?

A
NaOH(aq)

B
H₂SO₄(aq)

C
KCl(aq)

D
NH₄OH(aq)
Question 6
1 / -0

Which is a soluble base in water?

A
Cu(OH)₂

B
Fe(OH)₃

C
Zn(OH)₂

D
KOH
Question 7
1 / -0

In general, salts

A
are ionic compounds

B
contain hydrogen ions.

C
contain hydroxide ions.

D
turn blue litmus red.
Question 8
1 / -0

Which of the following properties is closely related to acids?

A
Contain the hydroxide ion

B
Bitter taste

C
Salty taste

D
Sour taste
Question 9
1 / -0

A base can be prepared by the reaction between

A
an active non-metal and water.

B
a gas and water.

C
a sulphide and water.

D
an active metal and water.
Question 10
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)

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Acids Bases and Salts Test - 7

Result

Acids Bases and Salts Test - 7

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Question 1

pH = 2.5

pH = 1.8

pH = 7

pH = 10

Question 2

less than 7

more than 7

equal to 7

equal to 0

Question 3

Wash the hand with saline solution

Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate.

After washing with plenty of water, apply solution of sodium hydroxide on the hand.

Neutralise the acid with a strong alkali.

Question 4

(i) and (ii)

(i), (ii) and (iii)

(ii), (iii) and (iv)

(i) and (iv)

Question 5

NaOH(aq)

H2SO4(aq)

KCl(aq)

NH4OH(aq)

Question 6

Cu(OH)2

Fe(OH)3

Zn(OH)2

KOH

Question 7

are ionic compounds

contain hydrogen ions.

contain hydroxide ions.

turn blue litmus red.

Question 8

Contain the hydroxide ion

Bitter taste

Salty taste

Sour taste

Question 9

an active non-metal and water.

a gas and water.

a sulphide and water.

an active metal and water.

Question 10

(i) only

(iii) only

(ii) and (iv)

(iii) and (iv)

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H₂SO₄(aq)

NH₄OH(aq)

Cu(OH)₂

Fe(OH)₃

Zn(OH)₂