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):
Mixture of which pair of gases is the cause of occurrence of most of the explosions in mines?
A. Methane and air
B. Methane and carbon
C. Carbon and air
D. Nitrogen and onxygen
Answer
Methane and air
nan
Que (2):
What is a strong argument for the particle nature of cathode rays?
A. They are cast shadow
B. They disintegrate
C. They disintegrate light
D. The seperate the white light
Answer
They are cast shadow
nan
Que (3):
What is the poison of honey bee?
A. Acidic
B. Basic
C. Neutral
D. none of these
Answer
Acidic
nan
Que (4):
Which inorganic precipitate acts as semi-permeable membrane?
A. Copper ferrocyonide
B. Antimony hydride
C. Antimony pentafluoride
D. Trisulfide
Answer
Copper ferrocyonide
nan
Que (5):
What is the number of electrons in an atom of atomic number Z and mass number A?
A. Z
B. A
C. X
D. B
Answer
Z
nan
Que (6):
To prepare a standard solution of a substance, what is generally used ?
A. Beaker
B. Test tube
C. Measuring flask
D. none of these
Answer
Measuring flask
nan
Que (7):
In methane molecule how are the four hydrogen atoms arranged?
A. As pentahedral
B. As octahedral
C. As tetrahedral
D. all of these
Answer
As tetrahedral
nan
Que (8):
Which variety of glass is heat resistant?
A. Laminated glass
B. PVB
C. Fire resistant glass
D. Pyrex
Answer
Pyrex glass
nan
Que (9):
What are Rubies and Sapphires chemically known as?
A. Aluminium hydroxide
B. Aluminium oxide
C. Magnesium Oxide
D. Magnesium hydroxide
Answer
Aluminium oxide
nan
Que (10):
Which pair of metals constitutes the lightest metal and the heaviest metal, respectively?
A. Nickel and Titanium
B. Mercury and Tin
C. Lead and Tin
D. Lithium and osmium
Answer
Lithium and osmium
nan
Que (11):
Which element has the lowest electron affinity?
A. Helium
B. Argon
C. Krypton
D. Xenon
Answer
Argon
nan
Que (12):
By whom was the calculation of electronegativities first done?
A. Gauss
B. Pauling
C. Euler
D. Turning
Answer
Pauling
nan
Que (13):
What does the emission of ß-particle?
A. Increases the atomic number by one
B. Increases the atomic number by two
C. Decreases the atomic number by one
D. Decreases the atomic number by Two
Answer
Increases the atomic number by one
nan
Que (14):
A fruity smell is obtained by the reaction of ethanol with which compound?
A. CH3COH
B. CH3COOH
C. CH2COOH
D. CH2COH
Answer
CH3COOH
nan
Que (15):
Which compound caused tragedy of Bhopal in 1984?
A. Ethyl Isocynite
B. Ethyl Isocynate
C. Methyl Isocynite
D. Methyl isocynate
Answer
Methyl isocynate
nan
Que (16):
Which compound is used as an antichlor?
A. Na2S2O3
B. Na3S2O3
C. Na2S2O2
D. Na2S3O3
Answer
Na2S2O3
nan
Que (17):
Which chemical used as a ‘fixer’ in photography?
A. Sodium thiosulphate
B. Magnesium thiosulphate
C. Ferrous thiosulphate
D. nan
Answer
Sodium thiosulphate
nan
Que (18):
Which metal has the highest density?
A. Gold
B. Iron
C. Zinc
D. Platinum
Answer
Platinum
nan
Que (19):
What does Soda water contain?
A. Nitrogen
B. Oxygen
C. Carbon dioxide
D. Suphur
Answer
Carbon dioxide
nan
Que (20):
Which major component is used in preparation of different types of glasses?
A. Silica
B. Silicone
C. Tin
D. Copper
Answer
Silica
nan
Que (21):
What is the main constituent of vinegar?
A. Citrus acid
B. Acetic acid
C. Carbonic acid
D. Oxalic acid
Answer
Acetic acid
nan
Que (22):
Which compound is used for writing on glass?
A. Hydrogen chloride
B. Hydrogen flouride
C. Hydrogen bromide
D. Hydrogen iodide
Answer
Hydrogen fluoride
nan
Que (23):
Which compound is commonly used as antifreeze in automobile radiators?
A. Pertrol
B. Greeze
C. Oil
D. Glycerol
Answer
Glycerol
nan
Que (24):
When water vapours are passed over aluminium carbide, what do we get?
A. Ethane
B. Methane
C. Propane
D. Butane
Answer
Methane
nan
Que (25):
Which metal was first discovered by man ?
A. Iron
B. Copper
C. Silver
D. Gold
Answer
Copper
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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