Acids Bases and Salts Test

Result

Acids Bases and Salts Test - 27

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

Which of the following salts does not contain water of crystallisation?

A
Blue vitriol

B
Baking soda

C
Washing soda

D
Gypsum

Solution

Blue vitriol is copper(II) sulphate pentahydrate $$({ CuSO }_{ 4 }.5{ H }_{ 2 }O)$$.

Baking soda is sodium bicarbonate without any water of crystallization $$(NaH{ CO }_{ 3 })$$.

Washing soda is sodium carbonate decahydrate $$({ Na }_{ 2 }{ CO }_{ 3 }. 10{ H }_{ 2 }O)$$.

Gypsum is a mineral composed of calcium sulphate dihydrate $$({ CaSO }_{ 4 }.2{ H }_{ 2 }O)$$.
Question 2
1 / -0

Identify the correct representation of reaction occurring during chloralkali process.

A
$$2NaCl(l) + 2H_{2}O(l) \rightarrow 2NaOH(l) + Cl_{2}(g) + H_{2}(g)$$

B
$$2NaCl(aq) + 2H_{2}O(aq) \rightarrow 2NaOH(aq) + Cl_{2}(g) + H_{2}(g)$$

C
$$2NaCl(aq) + 2H_{2}O(l)\rightarrow 2NaOH(aq) + Cl_{2}(aq) + H_{2}(aq)$$

D
$$2NaCl (aq) + 2H_{2}O (l)\rightarrow 2NaOH (aq) + Cl_{2}(g) + H_{2}(g)$$

Solution

Sodium chloride in water is a brine solution which gives sodium hydroxide in aqueous solution and hydrogen and chlorine gases. It is known as chloralkali process. It is an industrial process for the electyrolysis of sodium chloride. It is the technology which is used to produce chlorine and caustic soda(sodium hydroxide) on commercial scale.
Question 3
1 / -0

In which of the following bleaching powder is not used?

A
For bleaching wood pulp

B
For water sterilisation

C
As an oxidising agent

D
For sugar decolourisation

Solution

Bleaching powder is used in the following ways:-
1. For bleaching wood pulp in paper factories and for bleaching washed clothes in laundry.
2. As an oxidising agent in many chemical industries.
3. For disinfecting drinking water to make it free of germs.
It is not, however, used for sugar decolourisation.

Hence, correct answer is option D.
Question 4
1 / -0

Which of the following is not a salt?

A
Sodium chloride

B
Slaked lime

C
Lead sulphide

D
Zinc nitrate

Solution

Slaked lime is $$Ca(OH)_{2}$$ is not a salt.
Question 5
1 / -0

Bleaching powder is obtained by the reaction of $$Cl_{2}$$ with:

A
brine

B
solid $$NaCl$$

C
dry $$CaO$$

D
dry slaked lime

Solution

Bleaching powder is produced by the action of chlorine on dry slaked lime $$Ca(OH)_2$$
$$2Cl_2 + 2Ca(OH)_2 \rightarrow Ca(OCl)_2 + CaCl_2 + 2H_2O$$
$$ Bleaching\ powder$$
Thus, Option $$D$$ is correct
Question 6
1 / -0

When an acid reacts with a metal carbonate or metal hydrogen carbonate, it gives the corresponding salt, gas and product. Name the gas and product?

A
Carbon dioxide, Water

B
Carbon dioxide, Salt

C
Hydrogen, Salt

D
All of the above

Solution

Acid + Metal carbonate $$\longrightarrow$$ Salt + Water + Carbon dioxide.

The gas is carbon dioxide and the product is water.

Example-
CaCO$$_3$$ (calcium carbonate-metal carbonate) + 2HCl $$\longrightarrow$$ CaCl$$_2$$ (calcium chloride-salt) + H$$_2$$O + CO$$_2$$

Hence, option A is correct.
Question 7
1 / -0

Sodium carbonate is commonly known as:

A
baking soda

B
washing soda

C
chalk

D
plaster of paris

Solution

Sodium carbonate or washing soda has a hydrous form and an anhydrous form. Hydrous form is when sodium carbonate has some water molecules attached to it (formula is $$Na_2CO_3.10H_2O$$). Anhydrous sodium carbonate does not have water molecules attached to it ($$Na_2CO_3$$ only).
Question 8
1 / -0

Which of the following has the highest value of $$pH$$?

A
$$HCl$$

B
$$NaOH$$

C
$$Ca(OH)_2$$

D
$$CH_3COOH$$

Solution

$$NaOH$$ is the strongest base among all. Hence it has the highest value of $$pH$$.
Question 9
1 / -0

Which of the following $$pH$$ values at $$25^oC$$ corresponds to the strongest acid?

A
$$2$$

B
$$4$$

C
$$6$$

D
$$8$$

Solution

The lower is the $$pH$$ value, the stronger is the acid.

Therefore, the $$pH$$ value of $$2$$ corresponds to the strongest acid.
Question 10
1 / -0

The $$pH$$ of blood is:

A
strongly acidic

B
neutral

C
strongly basic

D
slightly basic

Solution

Blood is normally slightly basic, with a normal $$pH$$ range of $$7.35$$ to $$7.45$$. Usually the body maintains the $$pH$$ of blood close to $$7.40$$.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Acids Bases and Salts Test - 27

Result

Acids Bases and Salts Test - 27

Score

-

Rank

-

SHARING IS CARING

Question 1

Blue vitriol

Baking soda

Washing soda

Gypsum

Solution

Question 2

$$2NaCl(l) + 2H_{2}O(l) \rightarrow 2NaOH(l) + Cl_{2}(g) + H_{2}(g)$$

$$2NaCl(aq) + 2H_{2}O(aq) \rightarrow 2NaOH(aq) + Cl_{2}(g) + H_{2}(g)$$

$$2NaCl(aq) + 2H_{2}O(l)\rightarrow 2NaOH(aq) + Cl_{2}(aq) + H_{2}(aq)$$

$$2NaCl (aq) + 2H_{2}O (l)\rightarrow 2NaOH (aq) + Cl_{2}(g) + H_{2}(g)$$

Solution

Question 3

For bleaching wood pulp

For water sterilisation

As an oxidising agent

For sugar decolourisation

Solution

Question 4

Sodium chloride

Slaked lime

Lead sulphide

Zinc nitrate

Solution

Question 5

brine

solid $$NaCl$$

dry $$CaO$$

dry slaked lime

Solution

Question 6

Carbon dioxide, Water

Carbon dioxide, Salt

Hydrogen, Salt

All of the above

Solution

Question 7

baking soda

washing soda

chalk

plaster of paris

Solution

Question 8

$$HCl$$

$$NaOH$$

$$Ca(OH)_2$$

$$CH_3COOH$$

Solution

Question 9

$$2$$

$$4$$

$$6$$

$$8$$

Solution

Question 10

strongly acidic

neutral

strongly basic

slightly basic

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.