Acids Bases and Salts Test

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Acids Bases and Salts Test - 25

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Weekly Quiz Competition

Question 1
1 / -0

Ammonium chloride is a salt of:

A
Weak acid and weak base

B
Weak acid and strong base

C
Strong acid and strong base

D
Strong acid and weak base

Solution

Ammonium chloride is a salt of strong acid (hydrochloric acid) and weak base (ammonia).

The reaction is:
$$NH_3+HCl\rightarrow\ NH_4Cl$$

Hence, the option (D) is the correct answer.
Question 2
1 / -0

Acids are _______ in taste.

A
sour

B
bitter

C
spicy

D
sweet

Solution

Acids are sour in taste.
Example: Vinegar, tamarind, etc.
Question 3
1 / -0

Use of a mild base like _____on the stung area gives relief.

A
Washing soda

B
Milk of magnesia

C
Baking soda

D
Calcium carbonate

Solution

Bee-sting leaves an acid which causes pain and irritation. With the use of a mild base, such as, baking soda on the stung area, which helps in getting relief.
Question 4
1 / -0

Which of these give out hydronium ions in water?

A
Acids

B
Base

C
Both A and B

D
None of these

Solution

$$\textbf{Correct Option:}$$ A

$$\textbf{Explanation for correct option:}$$
Acids when dissolves in water hydronium ions $$(H_3O^+)$$ are given out.

$$\textbf{Explanation for incorrect options:}$$
(B) Bases when dissolves in water hydroxide ions $$(OH^-)$$ are given out.
Question 5
1 / -0

Which of the following can be used in the laboratory to test whether a solution is a base or an acid?

A
Olfactory indicator

B
Acid indicator

C
Basic indicator

D
Regular indicator

Solution

An Olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution.

Olfactory indicators can be used in the laboratory to test whether a solution is a base or an acid, a process called olfactory titration.

For eg, onion loses its characteristic smell in basic solution and retains its smell in acidic solution.

Hence, option A is correct.
Question 6
1 / -0

Hydrogen ions can be shown as which of the following?

A
$$H^+$$ ion

B
$$H_3O^+$$ ion

C
$$H_2O$$ molecule

D
$$H_2$$ gas

Solution

Hydrogen ions can be shown $$H^+$$ ion. Among the other options, $$H_3O^+$$ ion is a hydronium ion that is formed when hydrogen ion combines with a water molecule. $$H_2O$$ and $$H_2$$ are not ions.
Question 7
1 / -0

How is $$H_3O^+$$ ion formed?

A
$$H^+$$ + $$H^+$$ $$\rightarrow$$ $$H_3O^+$$

B
$$H_2O$$ + $$H_2O$$ $$\rightarrow$$ $$H_3O^+$$

C
$$H^+$$ + $$H_2$$ $$\rightarrow$$ $$H_3O^+$$

D
$$H^+$$ + $$H_2O$$ $$\rightarrow$$ $$H_3O^+$$

Solution

$$\textbf{Concept Applied:}$$ An equation is balanced when the same number of each element is represented on the reactant and product sides. Equations must be balanced to accurately reflect the law of conservation of matter.
$$\textbf{Correct Option:}$$ D
$$\textbf{Explanation for correct option:}$$
Hydronium ion or $$H_3O^+$$ ion is formed when hydrogen ion combines with a water molecule.
$$H^+$$ + $$H_2O$$ $$\rightarrow$$ $$H_3O^+$$
$$\textbf{Explanation for incorrect options:}$$ in other option the chemical equcation is not balnced.
Question 8
1 / -0

The acid present in the body of red ant is ________.

A
formic acid

B
acetic acid

C
nitric acid

D
sulphuric acid

Solution

An ant is known as Formica in Latin.
Thus the acid found in the red ant's body is known as formic acid.
Thus, we get a burning and itching sensation due to formic acid after an ant's bite.
Hence, the correct answer is an option $$(A)$$.
Question 9
1 / -0

Four solutions A, B, C and D when tested with universal indicator showed pH as $$4, 11, 7$$ and $$9$$ respectively. Which one of the four solutions is neutral?

A
A

B
B

C
C

D
D
Question 10
1 / -0

Bases generate ______ ions in water.

A
$$H^-$$

B
$$H^+$$

C
$$OH^-$$

D
$$OH^+$$

Solution

$$\textbf{Concept: }$$Base is a chemical substance that accepts Hydrogen ion or donate hydroxide ion in aqueous solution.
$$\textbf{Correct Option: }C$$
$$\textbf{Explanation: }$$ Potassium hydroxide is a base. It dissociates into ions in presence of water generating $$OH^-$$ ion.
$$KOH_{(aq)} \longrightarrow {K^+}_{(aq)} + {OH^-}_{(aq)}$$

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Re-Attempt Weekly Quiz Competition

Acids Bases and Salts Test - 25

Result

Acids Bases and Salts Test - 25

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SHARING IS CARING

Question 1

Weak acid and weak base

Weak acid and strong base

Strong acid and strong base

Strong acid and weak base

Solution

Question 2

sour

bitter

spicy

sweet

Solution

Question 3

Washing soda

Milk of magnesia

Baking soda

Calcium carbonate

Solution

Question 4

Acids

Base

Both A and B

None of these

Solution

Question 5

Olfactory indicator

Acid indicator

Basic indicator

Regular indicator

Solution

Question 6

$$H^+$$ ion

$$H_3O^+$$ ion

$$H_2O$$ molecule

$$H_2$$ gas

Solution

Question 7

$$H^+$$ + $$H^+$$ $$\rightarrow$$ $$H_3O^+$$

$$H_2O$$ + $$H_2O$$ $$\rightarrow$$ $$H_3O^+$$

$$H^+$$ + $$H_2$$ $$\rightarrow$$ $$H_3O^+$$

$$H^+$$ + $$H_2O$$ $$\rightarrow$$ $$H_3O^+$$

Solution

Question 8

formic acid

acetic acid

nitric acid

sulphuric acid

Solution

Question 9

A

B

C

D

Question 10

$$H^-$$

$$H^+$$

$$OH^-$$

$$OH^+$$

Solution

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