A quick 25 questions article on Chemistry – General Knowledge – MCQs important for competitive exams like in UPSC, state civil services, olympiads etc.
Other similar articles: Test – 1 | Test – 2 | Test – 3 | Test – 4 | Test – 5 | Test – 6 | Test – 7 | Test – 8 | 75 One Liners.
Questions Section
Que (1): In vulcanisation, with which the natural rubber is heated?
A. Sulphur
B. Nitrogen
C. Chlorine
D. Bromine
Answer: Sulphur
Explanation: nan
Que (2): Which is used as a filler in rubber tyres ?
A. Carbon black
B. Foam
C. Sintered metal
D. Engine oil
Answer: Carbon black
Explanation: nan
Que (3): Which gas has maximum calorific value?
A. Kerosene
B. Diseel
C. Natural gas
D. A and B
Answer: Natural gas
Explanation: nan
Que (4): A lighted candle gets extinguished when covered with a tumbler. Why?
A. Because of inadequate supply of air
B. Because of excess supply of air
C. Because of inadequate supply of oxygen
D. Because of excess supply of oxygen
Answer: Because of inadequate supply of air
Explanation: nan
Que (5): In anaerobic respiration, what is the net gain of ATP per glucose molecule oxidised?
A. 1
B. 2
C. 3
D. 4
Answer: 2
Explanation: nan
Que (6): The elements of group VA are generally known as which name?
A. Halogens
B. Radioactive
C. Actinones
D. Pnictogens
Answer: Pnictogens
Explanation: nan
Que (7): Which gas changes lime water in milky colour?
A. Carbon dioxide
B. Carbon monoxide
C. Nitrogen dioxide
D. Nitrogen monoxide
Answer: Carbon dioxide
Explanation: nan
Que (8): What does Gobar gas contains mainly?
A. Ethane
B. Methane
C. Propane
D. Butane
Answer: Methane
Explanation: nan
Que (9): Which are the important raw materials required in cement industry ?
A. Limestone
B. Clay
C. Nitrate
D. A and B
Answer: Limestone and clay
Explanation: nan
Que (10): What is not the cause of low conductivity of electrolyte?
A. Freedom of electrons
B. Pentagonal structure
C. Ionisation of salt
D. none of these
Answer: Ionisation of salt
Explanation: nan
Que (11): Cooking gas is a mixture of which gases?
A. Ethane and propane
B. Ethane and Butane
C. Methane and Propane
D. Butane and Propane
Answer: Butane and propane
Explanation: nan
Que (12): Which acid is produced when milk gets sour?
A. Lactic acid
B. Formic acid
C. Acetic acid
D. All of these
Answer: Lactic acid
Explanation: nan
Que (13): Which are the most commonly used chemicals in the artificial rain making or cloud seeding?
A. Potassium iodide
B. Silver iodide
C. Solid carbon dioxide
D. Liquid propane
Answer: Silver Iodide (Agl)
Explanation: nan
Que (14): Which compound does not give a positive test in Lassaigne’s test for nitrogen?
A. Sulfate
B. Hydroxide
C. Binary phase
D. Hydrazinc
Answer: Hydrazinc
Explanation: nan
Que (15): Litmus paper used in laboratory obtained from?
A. Lichen
B. Gum plant
C. Roots of trees
D. Teak
Answer: Lichen
Explanation: nan
Que (16): Which acid is used in synthetic lemonade?
A. Folic acid
B. Citric acid
C. Acetic acid
D. all of these
Answer: Citric acid
Explanation: nan
Que (17): A hydrogen atom is paramagnetic. What is a hydrogen molecule?
A. Paramagnetic
B. Diamagnetic
C. no magnetism
D. none of these
Answer: Diamagnetic
Explanation: nan
Que (18): Which of the toxic heavy metals is found in modern tannery industries?
A. Chromium
B. Platinum
C. Silver
D. Tin
Answer: Chromium
Explanation: nan
Que (19): Why is tetracycline used?
A. In chemoteraphy
B. In radiation
C. Anti polio drug
D. As anti-plague drug
Answer: As anti-plague drug
Explanation: nan
Que (20): Which contain high content of lead?
A. Solid fuel
B. Liquid fuels
C. Gaseous fuels
D. High octane fuel
Answer: High octane fuel
Explanation: nan
Que (21): Denatured spirit is a mixture of ethyl alcohol, methyl alcohol and which other thing?
A. Ethanol
B. Pyridine
C. methylated
D. Methanol
Answer: Pyridine
Explanation: nan
Que (22): Which element is in the highest amount in the composition of basalt rock?
A. Cotton
B. Nylon
C. Polythene
D. Silicon
Answer: Silicon
Explanation: nan
Que (23): Which fertiliser has more nitrogen content?
A. Human waste
B. Urea
C. Animal waste
D. All of these
Answer: Urea
Explanation: nan
Que (24): Food wrapped in newspaper is likely to get contaminated with?
A. Lead
B. Colour
C. Ink
D. All of these
Answer: Lead
Explanation: nan
Que (25): If a U-238 nucleus splits into two identical parts, how will the two nuclei be so produced?
A. Stabe
B. Unstable
C. Highly explosive
D. B and C
Answer: Stable
Explanation: nan
Other relevant links:
- Chemistry Objective GK Mock Test – 1
- Chemistry Objective GK Mock Test – 2
- Chemistry Objective GK Mock Test – 3
Conclusion:
Hope this article has provided you with some relevant knowledge for your exams. Do let us know in comments if this article is of help or if you want us to cover some other topic.
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