Acids Bases and Salts Test

Result

Acids Bases and Salts Test - 34

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Weekly Quiz Competition

Question 1
1 / -0

The __________ oxides can be neutralized with a base to form a salt and water.

A
Metal

B
Non-metal

C
Both of the above

D
None of the above

Solution

The non-metal oxides can be neutralized with a base to form a salt and water as the reaction between them is similar to the reaction between a base and an acid.
Question 2
1 / -0

Match the following:
Natural source Acid
1. Vinegar a. Oxalic acid
2. Orange b. Acetic acid
3. Tamarind c. Citric acid
4. Tomato d. Tartaric acid

A
1-a, 2-b,3-d,4-c

B
1-b, 2-c, 3-d, 4-a

C
1-a, 2-c, 3-d, 4-a

D
1-d, 2-a, 3-b, 4-c

Solution

Vinegar contains acetic acid.
Orange contains citric acid.
Tamarind has tartaric acid.
Tomato has oxalic acid.
Question 3
1 / -0

Olfactory indicator help to identify whether the given solution is acidic or basic by changing:

A
colour

B
smell

C
texture

D
all of the above

Solution

An olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution.
Olfactory indicators are based on the sensation of smell to identify the nature of the substance.
Some examples of olfactory indicators are onion, clove oil, vanilla extract, etc.
Thus, the correct option is B.
Question 4
1 / -0

When pH of rain water is less than 5.6, it is called:

A
monsoon rain

B
acid rain

C
basic rain

D
heavy rain

Solution

When pH of rain water is less than 5.6, it is called acid rain. When acid rain flows into the rivers, it lowers the pH of the river water too.
Question 5
1 / -0

Tooth decay starts when the pH of the mouth is less than:

A
4.5

B
5.5

C
6.5

D
7.5
Question 6
1 / -0

Which of these is a non-metallic oxide which reacts with base to form salt and water?

A
Carbon dioxide

B
Carbon monoxide

C
Both A and B

D
None of these

Solution

Only carbon dioxide $$(CO_2)$$ reacts with a base to form salt $$(Na_2CO_3)$$ and water $$(H_2O)$$.

Reaction:- $$ 2NaOH + CO_2 \longrightarrow Na_2CO_3 + H_2O $$

Carbon monoxide does not give this reaction.
Question 7
1 / -0

Hydrochloric acid reacts with carbonate to form:

A
carbide

B
hydride

C
chloride

D
None of the above

Solution

Metal carbonates react with acids to give a corresponding salt, carbon dioxide and water. So, hydrochloric acid reacts with carbonate to form a chloride.

$$2HCl+CaCO_3\rightarrow CaCl_2+H_2O+CO_2$$
Question 8
1 / -0

If we dip a piece of aluminium foil in sodium hydroxide:

A
iron hydroxide and sodium metal will be formed

B
hydrogen gas is liberated

C
no reaction takes place

D
temperature needs to be defined

Solution

Aluminium reacts with sodium hydroxide base to liberate hydrogen gas.
Question 9
1 / -0

$$H_{2}SO_{4} + CuCO_{3} \rightarrow$$ ____ $$ + H_{2}O + CO_{2}$$

A
$$CuSO_{4}$$

B
$$CuSO_{3}$$

C
$$CuSO_{2}$$

D
None of above

Solution

Metal carbonates react with acids to produce salt, water and carbon dioxide gas.
$$H_{2}SO_{4} + CuCO_{3} \rightarrow CuSO_{4} + H_{2}O + CO_{2}$$
Question 10
1 / -0

Which of these is not a non-metallic oxide?

A
$$SO_2$$

B
$$N_2O_5$$

C
$$P_4O_{10}$$

D
$$CaO$$

Solution

Sulphur, nitrogen and phosphorus are non-metals and form non-metallic oxides. $$CaO$$ is a metal oxide.

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Re-Attempt Weekly Quiz Competition

Natural source	Acid
1. Vinegar	a. Oxalic acid
2. Orange	b. Acetic acid
3. Tamarind	c. Citric acid
4. Tomato	d. Tartaric acid

Acids Bases and Salts Test - 34

Result

Acids Bases and Salts Test - 34

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Question 1

Metal

Non-metal

Both of the above

None of the above

Solution

Question 2

1-a, 2-b,3-d,4-c

1-b, 2-c, 3-d, 4-a

1-a, 2-c, 3-d, 4-a

1-d, 2-a, 3-b, 4-c

Solution

Question 3

colour

smell

texture

all of the above

Solution

Question 4

monsoon rain

acid rain

basic rain

heavy rain

Solution

Question 5

4.5

5.5

6.5

7.5

Question 6

Carbon dioxide

Carbon monoxide

Both A and B

None of these

Solution

Question 7

carbide

hydride

chloride

None of the above

Solution

Question 8

iron hydroxide and sodium metal will be formed

hydrogen gas is liberated

no reaction takes place

temperature needs to be defined

Solution

Question 9

$$CuSO_{4}$$

$$CuSO_{3}$$

$$CuSO_{2}$$

None of above

Solution

Question 10

$$SO_2$$

$$N_2O_5$$

$$P_4O_{10}$$

$$CaO$$

Solution

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