inorganic chemistry - Category wise Question and Answer Practice Test with Solutions
Question : 14
Select the correct statements:
- Plants use CO2 during the process of photosynthesis
- CO2 dissolved in water reacts with limestone present in rocks to form A which is absorbed by marine animals. Compound A helps in the formation of shells by marine animals.
- The % of oxygen in the air dissolved in water is about 32- 35%.
- Aquatic animals use dissolved oxygen to respire.
a) 1, 3 and 4
b) 2 and 4
c) 1, 2 and 3
d) 1, 2, 3 and 4
Answer »Answer: (d)
Question : 15
Which of the statements given below is/are correct?
The permanent hardness of water is due to the presence of soluble.
- chloride of calcium
- bicarbonate of calcium
- sulphate of magnesium
- bicarbonate of magnesium
a) 2 and 4
b) 1 and 3
c) 1 only
d) 1, 2 and 3
Answer »Answer: (b)
Chlorides and sulphates of calcium and magnesium are responsible for the permanent hardness of the water.
Note: Bicarbonates are responsible for the temporary hardness of the water.
IMPORTANT general science mcq EXERCISES
set 1 Online Quiz
Click to Start..general science mcq CATEGORIES
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» Measurement And SI Units
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» Measuring Devices And Scales
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» Mechanics (Mass, Force, Acceleration, Work, Energy, Momentum, Velocity)
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» Force Of Gravity, Solids And Fluids
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» Motion Under Gravity
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» Physical Properties Of Materials
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» Light, Heat, Thermodynamics, Wave Motion, Sound, Optics & Oscillations
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» Electric Current And Magnetism
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» Nuclear Physics And Conductivity
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» Modern And Space Physics, Sources Of Energy
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» General Concepts Of Chemistry
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» Nature Of Matter And Composition
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» Atomic Structure Molecules And Nuclear Chemistry
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» Classification Of Elements, Chemical Bonding, Periodicity In Properties & Physical Transformation
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» Metals, Non Metals, Minerals, Ores, Properties, Uses
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» Alloys, Carbon & Its Various Forms, Hydrogen & Compounds, Sulphur, Nitrogen, Halogen & Inert Gases
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» Acids, Bases, Salts And Metals
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» Hydrocarbon, Alcohol, Polymer, Organic Acid And Explosive Substance
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» Fuel, Food Preservation, Nutrition, Medicine, Detergents And Fertilizers
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» Inorganic Chemistry
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» Organic Chemistry
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» Environmental Chemistry
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» Some Important Man Made Materials
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» Sub Divisions Of Biology
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» Genetics, Evolution Of Life & Ecological Biodiversity
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» Taxonomy
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» Heredity
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» Biofertilizer
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» Biological Classification Cell Tissues And Division
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» Human Anatomy
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» Blood Transport System
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» Digestion And Excretion
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» Photosynthesis
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» Vitamins, Nutrition, Health, Disease And Treatment
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» Endocrine Glands, Hormones
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» Physiology Of Plants, Humans And Animals
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» Reproduction
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» Genetic Engineering And Bio Technology
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