classification of elements, chemical bonding, periodicity in properties & physical transformation - Category wise Question and Answer Practice Test with Solutions
classification of elements, chemical bonding, periodicity in properties & physical transformation PRACTICE TEST [4 - EXERCISES]
set 1
set 2
set 3
set 4
Question : 1
Consider the following statements regarding Bohr atomic model:
- It introduces the idea of stationary orbits.
- It assumes that the angular momentum of the electron is equal to -$(1/2)h/{2π}$
- It uses the planetary model of the atom involving circular orbits.
a) 1 and 3
b) 1 and 2
c) 2 and 3
d) 1, 2 and 3
Answer »Answer: (a)
According to Bohr, model electrons revolve around the nucleus in stationary orbits.
The angular momentum of these orbits is an integral multiple of $h/{2π}$.
It uses a planetary model of the atom involving circular orbits.
Question : 3
Element A belongs to Group VII in p-block and element B belongs to Group I in s-block of the periodic table. Out of the following assumptions, the correct one is :
a) A and B are non-metals
b) A is a metal and B is a non-metal
c) A and B are metals
d) A is a non-metal and B is a metal
Answer »Answer: (d)
Element A belongs to the halogens (Group VII) group and is a non-metal.
While element B belongs to the alkali metal group (Group I) and is a metal.
Question : 4 [UPPCS (Pre) 1994]
Why does water boil at a temperature below 100ºC at higher altitudes?
a) The gravitational attraction is less
b) Because of heavy winds in mountains
c) The atmospheric pressure decreases and hence boiling point is lowered
d) None of the above is correct
Answer »Answer: (c)
Question : 5 [IAS (Pre) 2014]
Which of the following is/are the example/examples of chemical change?
- Crystallization of sodium chloride
- Melting of ice
- Souring of milk
a) Only 3
b) 1, 2 and 3
c) Only 1 and 2
d) None of the above
Answer »Answer: (a)
IMPORTANT general science mcq EXERCISES
set 3 Online Quiz
Click to Start..general science mcq CATEGORIES
-
» Measurement And SI Units
-
» 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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