Acids Bases and Salts Test

Result

Acids Bases and Salts Test - 41

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Weekly Quiz Competition

Question 1
1 / -0

Sulphuric acid reacts with cupric oxide to give:

A
copper(II) sulphate

B
cuprous sulphate

C
no reaction

D
it converts to cuprous oxide.

Solution

$$H_2SO_4 + CuO \rightarrow CuSO_4 + H_2O$$

Sulphuric acid reacts with cupric oxide to give copper(II) sulphate and water.
Hence, correct option is $$\text{A}$$.
Question 2
1 / -0

When sodium hydroxide reacts with aluminium metal:

A
sodium aluminate and water gas are formed

B
sodium aluminate and hydrogen gas are formed.

C
no reaction

D
can't say

Solution

Sodium aluminate and hydrogen gas are formed when sodium hydroxide reacts with aluminium metal.
$$2NaOH +2Al +2H_2O \rightarrow 2NaAlO_2 +2H_2$$
Option B is correct.
Question 3
1 / -0

What does an acid give when they react with metal hydrogen carbonate?

A
$$C{O}_{2}$$

B
$${H}_{2}O$$

C
Salt

D
All of above

Solution

Acids give carbon dioxide gas, respective salt and water when they react with metal hydrogen carbonate.
Acid $$+$$ Metal hydrogen carbonate $$\rightarrow$$ Salt $$+$$ Carbon dioxide $$+$$ Water.
Question 4
1 / -0

The reaction of aluminum atoms displacing hydrogen ions from sulphuric acid can be represented as:

A
$$2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2$$

B
$$Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+H_2$$

C
$$3Al+2H_2SO_4\rightarrow Al_3(SO_4)_2+2H_2$$

D
$$2Al+6H_2SO_4\rightarrow Al_2(SO_4)_6+6H_2$$

Solution

The reaction of aluminium atoms displacing hydrogen ions from sulphuric acid can be represented as :
$$2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2$$
This is the balanced chemical equation.
The products of the reaction are aluminium sulphate and hydrogen.
Question 5
1 / -0

Metallic oxides dissolve in water to form:

A
acidic solution

B
neutral solution

C
basic solution

D
none of these
Question 6
1 / -0

After heating, copper sulphate crystals turn :

A
green

B
blue

C
white

D
black

Solution

Copper sulphate crystals that seem to be dry contain water of crystallisation. When we heat the crystals, this water is removed and the salt turns white.
Thus, option $$C$$ is the correct option.
Question 7
1 / -0

Identify the acid-base reaction from the following.

A
$$NaCl + H_2O \rightarrow NaOH + HCl$$

B
$$CaCO_3 + H_2O \rightarrow Ca(OH)_2 + CO_2$$

C
$$NaOH + HCl \rightarrow NaCl + H_2O$$

D
$$CuSO_4 + Zn \rightarrow ZnSO_4 + Cu$$

Solution
Question 8
1 / -0

An indicator $$InH$$ has $${K_{In}}$$ value of $${10^{ - 7}}$$, it may exist in its molecular and ionic state in approximately $$1:1$$ ratio in which substance:

A
lemon juice

B
black coffee

C
milk

D
lime water
Question 9
1 / -0

How many grams of alkali NaOH is neutralized by $$6.1$$ grams of benzoic acid $$({ C }_{ 6 }{ H }_{ 5 }COOH)?$$

A
4g

B
2g

C
12.2g

D
6.1 g

Solution
Question 10
1 / -0

Which among the following groups is acidic in nature?

A
Grapes and distilled water

B
Soap solution and vinegar

C
Milk of magnesia and milk

D
Ant sting and vinegar

Solution

A. Grapes contain tartaric acid. Distilled water is neutral.
B. Soap solution is basic in nature. Vinegar contains acetic acid ($$ { CH }_{ 3 }COOH $$)
C. Milk of magnesia ($$ { Mg }{ (OH) }_{ 2 } $$) is basic in nature. Milk has lactic acid.
D. Ant sting contains formic acid and vinegar contains acetic acid ($$ { CH }_{ 3 }COOH $$)
Hence, D is the answer.

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Re-Attempt Weekly Quiz Competition

Acids Bases and Salts Test - 41

Result

Acids Bases and Salts Test - 41

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SHARING IS CARING

Question 1

copper(II) sulphate

cuprous sulphate

no reaction

it converts to cuprous oxide.

Solution

Question 2

sodium aluminate and water gas are formed

sodium aluminate and hydrogen gas are formed.

no reaction

can't say

Solution

Question 3

$$C{O}_{2}$$

$${H}_{2}O$$

Salt

All of above

Solution

Question 4

$$2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2$$

$$Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+H_2$$

$$3Al+2H_2SO_4\rightarrow Al_3(SO_4)_2+2H_2$$

$$2Al+6H_2SO_4\rightarrow Al_2(SO_4)_6+6H_2$$

Solution

Question 5

acidic solution

neutral solution

basic solution

none of these

Question 6

green

blue

white

black

Solution

Question 7

$$NaCl + H_2O \rightarrow NaOH + HCl$$

$$CaCO_3 + H_2O \rightarrow Ca(OH)_2 + CO_2$$

$$NaOH + HCl \rightarrow NaCl + H_2O$$

$$CuSO_4 + Zn \rightarrow ZnSO_4 + Cu$$

Solution

Question 8

lemon juice

black coffee

milk

lime water

Question 9

4g

2g

12.2g

6.1 g

Solution

Question 10

Grapes and distilled water

Soap solution and vinegar

Milk of magnesia and milk

Ant sting and vinegar

Solution

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