Q1. Assertion: Acetic acid does not act as an acid in benzene solution. Reason: Benzene is non-polar.
Q2. Assertion: Calcium oxide is a base but not an alkali. Reason: Calcium oxide is insoluble in water.
Q3. Assertion: There is no change in the colour of litmus paper when brought in contact with distilled water. Reason: Litmus Paper is used to find whether an solution is Acidic or Basic
.Q4. Assertion: When bleaching power is left in the open, its colour changes from blue to white. Reason: The change in colour as oxygen breaks away from the compound.
Answers
Answer:
1.Acetic acid does not act as an acid in the benzene solution because acetic acid dimerizes in benzene due to hydrogen bonding. Benzene being a non-polar solvent does not react with acetic acid.
2.Metal oxides are basic, non-metal oxides are acidic. Now, we need to check if it's soluble or not, as if it is soluble, it's considered an alkali, but if it's insoluble, it is a base. ... Calcium oxide (CaO) , commonly known as quicklime or burnt lime, is a widely used chemical compound.
3.Distilled water is neutral. We can verify that by dipping red or blue litmus paper. There will be no change in colour due to neutral nature.
4.Bleaching powder has a natural tendency of absorbing water. When we keep it in the open air, it absorbs the atmospheric moisture and becomes watery. Chemical change: By reacting with the atmospheric oxygen bleaching powder produces calcium carbonate and chlorine gas. That is what makes it change it's colour.
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