@ State whether the following statements are True (T) or False (F).
1 Salts formed during neutralization are always neutral in nature.
2. Acids are highly corrosive in nature.
2 Ammonium hydroxide is present in most cleaning agents.
4 Phenolphthalein solution has no effect on acids.
5 The pH value of 7 indicates a substance is neutral.
Answer the following in one word each.
1 Substances that cause orange, curd and tamarind to have a sour taste
2. Substances that cause soaps to have a slippery feel and bitter taste
3 Substances that are neither acidic or basic
4 The common name of calcium carbonate
5. Substances produced as a result of neutralization between acids and bases
Answer the following questions briefly.
1 Acids are not stored in metal containers. Why?
2. Why do different substances have different tastes?
3. Distinguish between organic acids and mineral acids
4. What are universal indicators and what are their uses?
5. Distinguish between strong and weak bases.
Answer the following questions in detail.
1. Distinguish between acids and bases.
2. Neutralization reactions play an important role in our daily life. Support the statement
with at least two examples.
Answers
Answer:
1 .No
2.Yes
3.Yes
4.No
5.Yes
_____________________________-------
1.Acids
2.Bases
3.Neutral
4. Limestone(CaCo3)
5.Salt and Water
________________-_________________
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Answer:
I can tell all, my all answers are 101% correct.
Explanation:
True or False:-
1) True
2)True
3)True
4)True
5)True
Answer in One Word:-
1) Acid
2) Bases
3) Neutral
4) Chalk
5) Salt and Water
Answer In Brief:-
1) Acids are corrode, metals like aluminum and iron due to their corrosive nature. Hence acids are stored in glass containers and not in metal containers.
2) Each substance has a unique chemical composition, so the taste of substances varies
3)Organic Acids:- Acids that are naturally obtained from plant and animal sources are called organic acids.
Mineral Acids:- Acids that are derived from an inorganic material or source are called mineral acids.
4) Universal Indicators are compounds that show a gradual change in color to indicate the acidity or basicity for PH values from 1 to 14. These indicators are available both as strips or paper (called PH paper) and as solution. To find the PH value of unknown solutions, the change in color of these substances can be compared with that of the standard color chart.
5) Strong Bases:- Some of the bases are corrosive in nature and may result in skin burns. Such bases are called strong bases.
Weak Bases:- Some of the bases are not corrosive in nature and are called weak bases.
Answer In Detail:-
1) ACIDS:-
1) Acids are sour in taste.
2) Acids turn blue litmus to red.
3) Acids can corrode metals aluminum and iron due to their corrosive nature. That is why acids are stored in glass containers and not in metal containers.
4) Acids are soluble in water.
BASES:-
1) Bases are bitter to taste.
2) Bases turn red litmus to blue.
3) Bases are slippery to touch.
4) Some of the bases are soluble in water, they are called Alkali. Some bases are insoluble in water and are not alkali.
2) Some neutralization reactions that we observe in our daily life are:-
a) In The Treatment Of Ant Sting:- Some people are highly allergic to ant sting as it releases formic acid. It is neutralized by rubbing moist baking soda (Sodium Bicarbonate) or calamine solution which contains zinc carbonate.
b) In The Treatment Of Indigestion:- Hydrochloric acid secreted in the stomach helps in the digestion of food. However, its excess secretion could lead to acidity and indigestion. Milk of Magnesia is used to neutralize the acid.
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