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WorksheetsAcids, Bases and Salts (Class 7)
Total questions: 20
Worksheet time: 10mins
What is an Acid?
Acids are the substances sour in taste and corrosive in nature.
Acids are the substance sour in taste and not corrosive in nature.
Acids are the substances bitter in taste and corrosive in nature.
Acids are the substances sweet in taste and corrosive in nature.
Acids have _____ ions.
H+
OH-
H-
OH+
Vitamin C is actually ______ acid.
Nitric Acid
Ascorbic Acid
Citrus Acid
Tartaric Acid
Chemical name of Lime Water..
Calcium Hydroxide
Calcium Carbonate
Calcium oxide
Calcium bisulphate
Window cleaners generally contains...
Magnesium Hydroxide
Potassium Hydroxide
Ammonium Hydroxide
Sodium Hydroxide
Tamarind , Grapes , Unripe Mangoes , Cherries , Peach etc.. contains
Lactic Acid
Citric Acid
Tartaric Acid
Ascorbic Acid
Soap contains ______.
Potassium Hydroxide
Calcium Hydroxide
Ammonium Hydroxide
Magnesium Hydroxide
Which of these are Natural Indicators?
Turmeric
Red Cabbage
Hibiscus
All of these
Case Study:
There is farming field near your house. The farmer of that field is complaining that the plants and crops are not growing properly.. Farmer is telling that the soil is acidic.. What he should add to the soil to make it suitable for farming?
Quick Lime
Nitric Acid
Hydrochloric Acid
Citric Acid
HCL + NaOH = __________ + _________
NaCl + H02
Na2OH + H20
NaCl + H20
C12H22O11 + H20
Ant bites you.. You are feeling pain... What should be used in order to cure pain?
Formic Solution
Callamine Solution
HCL Solution
Calamine Solution
What are Acid salts?
Salt formed from solution which has Strong Base but weak Acid.
Salt formed from solution which has Strong Acid but weak Base.
Salt formed from solution which has Strong acid and Base.
Salt formed from solution which has weak acid and Base.
_____________ is used as an Antacid.
Magnesium Hydroxide
Sodium Hydroxide
Ammonium Hydroxide
Calcium Hyrdroxide
What does PH value "7" indicates ?
Neutral Solution
Acidic Solution
Basic Solution
Strong Acidic Solution
Strong Basic Solution
Methyl Orange changes color to _______ in Acidic Solution and ________ in Basic Solution.
Red , Yellow
Red , Orange
Yellow , Orange
Orange, Red
Identify base and acid with help of ions present in them.
Purple - Acid ,
Orange - Base
Purple - Base ,
Orange - Acid
Purple - Neutral,
Orange - Base
Purple - Acid ,
Orange - Neutral
Baking Soda is scientifically called as
Sodium HydrogenCarbonate
Sodium Oxide
Sodium Carbonate
Sodium Hydroxide
What color will Red litmus paper will change in Acid?
Blue
Red
No color change
Everything is possible.
Litmus is extraced from __________.
lichens
herbs
cockroach
flower
Riddle:
I am an Acid.. I am helpful in digestion of food particles in our body! If I am too much acidic, you will surely take antacid to neutralize me. Who am I ?
HCL Acid
Sulphuric Acid
Citric Acid
Milk of Magnesia
