A quick 25 questions article on Chemistry – General Knowledge – MCQs important for competitive exams like in UPSC, state civil services, olympiads etc.
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
Methane and air
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
They are cast shadow
What is the poison of honey bee?
D. none of these
Which inorganic precipitate acts as semi-permeable membrane?
A. Copper ferrocyonide
B. Antimony hydride
C. Antimony pentafluoride
What is the number of electrons in an atom of atomic number Z and mass number A?
To prepare a standard solution of a substance, what is generally used ?
B. Test tube
C. Measuring flask
D. none of these
In methane molecule how are the four hydrogen atoms arranged?
A. As pentahedral
B. As octahedral
C. As tetrahedral
D. all of these
Which variety of glass is heat resistant?
A. Laminated glass
C. Fire resistant glass
What are Rubies and Sapphires chemically known as?
A. Aluminium hydroxide
B. Aluminium oxide
C. Magnesium Oxide
D. Magnesium hydroxide
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
Lithium and osmium
Which element has the lowest electron affinity?
By whom was the calculation of electronegativities first done?
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
Increases the atomic number by one
A fruity smell is obtained by the reaction of ethanol with which compound?
Which compound caused tragedy of Bhopal in 1984?
A. Ethyl Isocynite
B. Ethyl Isocynate
C. Methyl Isocynite
D. Methyl isocynate
Which compound is used as an antichlor?
Which chemical used as a ‘fixer’ in photography?
A. Sodium thiosulphate
B. Magnesium thiosulphate
C. Ferrous thiosulphate
Which metal has the highest density?
What does Soda water contain?
C. Carbon dioxide
Which major component is used in preparation of different types of glasses?
What is the main constituent of vinegar?
A. Citrus acid
B. Acetic acid
C. Carbonic acid
D. Oxalic acid
Which compound is used for writing on glass?
A. Hydrogen chloride
B. Hydrogen flouride
C. Hydrogen bromide
D. Hydrogen iodide
Which compound is commonly used as antifreeze in automobile radiators?
When water vapours are passed over aluminium carbide, what do we get?
Which metal was first discovered by man ?
Other relevant links:
- Chemistry Objective GK Mock Test – 1
- Chemistry Objective GK Mock Test – 2
- Chemistry Objective GK Mock Test – 3
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.