General Awareness Quiz – Chemistry
General Awareness Quiz Set 25 for SSC CGL, SSC CHSL and Railways exams. General Science- Chemistry Quiz for SSC CGL, SSC CHSL, Railways etc.
Topic: Chemistry
- Natural rubber is a polymer of:
A) Styrene
B) Propene
C) Vinyl Acetate
D) Isoprene
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Option D.
Explanation: Isoprene.Natural rubber consists of suitable polymersthe organic compound isoprene, with minor impurities of other organic compounds plus water. Isoprene isproduced and emitted by many species of trees into the atmosphere (major producers are oaks, poplars, eucalyptus, and some legumes).
- In electro-refining, the pure metal is deposited on:
A) Anode
B) Cathode
C) Vessel
D) Electrolyte
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Option B.
Explanation: Cathode. In electro-refining, the anodes consist of unrefined impure metal, and as the current passes through the acidic electrolyte the anodes are corroded into the solution so that the electroplating process deposits refined pure metal onto the cathodes. Electrolytic refining is used to extract impurities from crude metals.
- An example of heterocyclic compound is
A) Anthracene
B) Naphthalene
C) Furan
D) Benzene
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Option C.
Explanation: Furan. A heterocyclic compound is a cyclic compound that has atoms of at least two different elements as members of its ring (s). Furan is a heterocyclic organic compound, consisting of a five-membered aromatic ring with four carbon atoms and one oxygen.
- The ph of lemon juice is expected to be
A) more than 7
B) less than 7
C) nothing can b predictable
D) equal to 7
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Option B.
Explanation: The pH level of lemon juice is, 2.00 to 2.60. It arise depending on the lemon. pH expresses different levels of acidity or alkalinity within a solution.
- The gas causing acid rain in industrial area is:
A) Carbon dioxide
B) Methane
C) Sulphur dioxide
D) Carbon monoxide
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Option C.
Explanation:Sulpher dioxide. The main gases responsible for causing acid rain are sulphur dioxide as well as nitrous oxides. The main sources of sulphur dioxide are metal working industries and coal-fired power stations whereas nitrous oxide is from vehicles and fuel combustion
- The degree of dissociation of an electrolyte depends upon:
A) Dilution
B) Impurities
C) Method of Diasolution
D) Atmospheric Pressure
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Option A.
Explanation: Dilution. The extent to which an electrolyte dissociates into ions is known as degree of dissociation or ionization and depends upon the following factors: (1) Nature of the electrolyte, (2) Temperature, (3) Dilution, (4) nature of the solvent, and presence of other ions.
- An alloy used in making heating elements for electric heating device
A) Alloy Steel
B) Solder
C) German Silver
D) Nichrome
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Option D.
Explanation: Nichrome is a mixture of chromium andNichrome wire is a great conductor of electricity. Nichrome is used to make heating coils and othertypes of elements in household appliances.
- The gas used to extinguish fire is:
A) Carbon Monoxide
B) Carbon Dioxide
C) Neon
D) Nitrogen
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Option B.
Explanation: Carbon Dioxide. Fires require these 3 things: a fuel (a hydrocarbon which is a compound containing only carbon hydrogen), a source of oxygen, and heat. C Dioxide is most commonly used to extinguishit displaces oxygen, thus choking fire
- Which of the following group of gasses contribute to the Green House Effect:
A) Ammonia and Ozone
B) Carbon Dioxide and Methane
C) Carbon Tetrafluoride and Nitrous Oxide
D) Carbon Monoxide and Sulphur Dioxide
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Option B.
Explanation: Carbon Dioxide and Methane.The primary greenhouse gases in the Earth atmosphere are water vapour, carbon dioxide, Methane, nitrous oxide, and ozone. When ranked by their direct contribution to the greenhouse effect, the most important are: Water vapour and clouds: 36-79%, Carbon Dioxide: 9-26 %, Methane: 4-9 % and Ozone 3-7 %.
- Sulphuric acid is:
A) Diabasic
B) Monobasic
C) Tribasic
D) Tetrabasic
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Option A.
Explanation: Diabasic.An example of a dibasic acid is sulphuric acid H2S04.Dibasic acids yield two free hydrogen ions insolution for each molecule of acid ionized. H2SO4—>2H+ + SO4 ²¯
