Can anyone share picture of important questions of acid bases and salt ( CLASS 10)
Answers
Explanation:
(a) Define olfactory indicators. Name two subtances which can be used as olfactory indicator.
(b) Choose strong acids from the following:
CH3COOH, H2SO4, H2CO3, HNO3
Answer.
(a) Those substances whose smell (odour) changes in acidic or basic solution are called olfactory indicators, e.g. onion and vanilla.
(b) H2SO4 and HNO3 are strong acids.
5.A white coloured powder is used by doctors for supporting fractured bones.
(a) Write chemical name and formula of the powder.
(b) When this white powder is mixed with water a hard solid mass is obtained. Write balanced chemical equation for the change.
Answer.
acids-bases-salts-chapter-wise-important-questions-class-10-science-1
6.Explain the action of dilute hydrochloric acid on the following with chemical equation:
(i) Magnesium ribbon (ii) Sodium hydroxide (iii) Crushed egg shells
Answer.
acids-bases-salts-chapter-wise-important-questions-class-10-science-2
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- Answer:
How will you distinguish acids from bases for their chemical properties?
What happens when an acid reacts with a metal? Explain with a suitable reaction example.
Explain metallic oxides reacting with acids.
Are non-metallic oxides acidic in nature? Justify your statement with suitable examples.
Why should you not keep sour substances in copper or brass utensils?
How can you say that acids in aqueous solution conduct electricity?
Is it possible for dry HCl change the colour for dry litmus paper? If no, then why?
Why is it good to add acids to water drop by drop rather than adding water to acids?
State different chemical properties of bases.
What happens when excess base is diluted into the water? What happens to the present concentration of OH- ions?
Suppose you have two compounds. One has pH as five another having 9. Which compound will be having more H+ ions? Also, describe which one is acidic or basic. Give reasons for each.
What happens to red litmus when kept in acid?
How are salts formed?
- Which is common salt widely used?