Carbon dioxide reacts with lime water Ca OH 2 to form salt CaCO 3 and water as- Ca OH 2 base + CO 2 → CaCO 3 salt + H 2 O water Indicate the nature of CO 2 . What will be the general nature of non-metallic oxides?

Carbon dioxide reacts with lime water Ca OH 2 to form salt CaCO 3 and water as- Ca OH 2 base + CO 2 → CaCO 3 salt + H 2 O water The nature of CO 2 is acidic in nature as it is a non-metallic oxide. The general nature of non-metallic oxides is that they are acidic in nature. Their aqueous solution turns blue litmus red.

E M B I B E

Science for Class 10>Chapter 3 - Acids, Bases and Salt>Let us answer these>Q 1

MEDIUM

10th Manipur Board

IMPORTANT

Earn 100

Add a drop of indicators to the following substances in the table given below and record the change in colour:

Sample solution Phenolphthalein Blue Litmus Red Litmus Methyl Orange

Hydrochloric acid

Sulphuric acid

Acetic acid

Oxalic acid

Sodium hydroxide

Sodium carbonate

Ammonium hydroxide

From the observed facts, write conclusions of the results.

Important Questions on Acids, Bases and Salt

EASY

10th Manipur Board

IMPORTANT

Science for Class 10>Chapter 3 - Acids, Bases and Salt>Let us answer these>Q 2

Suggest the use of turmeric as an indicator.

EASY

10th Manipur Board

IMPORTANT

Science for Class 10>Chapter 3 - Acids, Bases and Salt>Let us answer these>Q 3

Is sodium chloride solution acidic or basic?

HARD

10th Manipur Board

IMPORTANT

Science for Class 10>Chapter 3 - Acids, Bases and Salt>Let us answer these>Q 1

Dissolve a small amount of

{NaHCO}_{3}

in the water. Add 1 drop of methyl orange into it. What is the colour of the mixture?
Add lime water in the above solution till the evolution of the gas stops. What is the colour of the mixture now?

HARD

10th Manipur Board

IMPORTANT

Science for Class 10>Chapter 3 - Acids, Bases and Salt>Let us answer these>Q 2

How many grams of sulphuric acid

(H_{2} {SO}_{4})

will be needed to react completely with a solution containing

10.6 g

of sodium carbonate

{Na}_{2} {CO}_{3}

?

EASY

10th Manipur Board

IMPORTANT

Science for Class 10>Chapter 3 - Acids, Bases and Salt>Let us answer these>Q 1

What is the nature of metal oxides-acidic or basic?

MEDIUM

10th Manipur Board

IMPORTANT

Science for Class 10>Chapter 3 - Acids, Bases and Salt>Let us answer these>Q 2

Two metallic compounds A and B react separately with acid to form salt and water. Compound A also produces an effervescence. What could be A and B?

MEDIUM

10th Manipur Board

IMPORTANT

Science for Class 10>Chapter 3 - Acids, Bases and Salt>Let us answer these>Q 3

When milk becomes curd lactic acid is produced as one of the products. Give reason why it is not advisable to keep curd in copper and brass vessels?

MEDIUM

10th Manipur Board

IMPORTANT

Science for Class 10>Chapter 3 - Acids, Bases and Salt>Let us answer these>Q 4

Carbon dioxide reacts with lime water

Ca {(OH)}_{2}

to form salt

{CaCO}_{3}

and water as-

\underset{base}{Ca {(OH)}_{2}} + {CO}_{2} \to \underset{salt}{{CaCO}_{3}} + \underset{water}{H_{2} O}

Indicate the nature of

{CO}_{2}

. What will be the general nature of non-metallic oxides?

Learn and Prepare for any exam you want !

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Sample solution	Phenolphthalein	Blue Litmus	Red Litmus	Methyl Orange
Hydrochloric acid
Sulphuric acid
Acetic acid
Oxalic acid
Sodium hydroxide
Sodium carbonate
Ammonium hydroxide