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.
Que (1): What are soaps?
A. Sodium or potassium salts of heavier fatty acids
B. Sodium or potassium salts of lighter fatty acids
C. Sodium salts of heavier fatty acids
D. Potassium salts of heavier fatty acids
Answer: Sodium or potassium salts of heavier fatty acids
Que (2): Which material is suitable for water purification?
B. Cotton balls
Que (3): Which chemical is used in foam fire extinguishers?
A. Iron sulphide
B. Aluminium sulphate
C. Iron sulphate
D. Aluminium sulphide
Answer: Aluminium sulphate
Que (4): Which harmful element exists in tobacco ?
A. Hydrogen cyanide
Que (6): During electrolysis, which the species are discharged at cathode?
Que (7): Fisher-Tropsch process is used in the manufacture of which liquid?
A. Unleaded petrol
B. Octane petrol
C. 95 RON petrol
D. Synthetic petrol
Answer: Synthetic petrol
Que (8): Which substance is used as antiknock compound?
Que (9): The deficiency of which leads to dental caries?
Que (10): Non-stick cooking utensils are coated with which metal?
D. Stainless steel
Que (11): How can Permanent hardness of water be removed?
A. By adding baking soda
B. By adding washing soda
C. By adding soap
D. By adding flour
Answer: By adding washing soda
Que (12): What is generally present in tonics?
Que (13): What does mixture of CS2 and H2S on passing over heated copper give?
Que (14): What is the The chemical part of the dye that absorbs light and produces colour called as?
C. Polyester fibers
D. A pigment
Answer: A pigment
Que (15): Which when dissolved in H2O gives hissing sound?
B. Basalt rock
Que (16): Which metal is not attacked by the environment?
Que (17): Which colloidal solution is used in photography?
A. Colloidal silver bromite
B. Colloidal bromite
C. Colloidal copper bromite
D. all of these
Answer: Colloidal silver bromite
Que (18): A deuterium nucleus consists of which particles?
A. One proton and one neutron
B. One proton and two neutron
C. One electron and one neutron
D. Two proton and one neutron
Answer: One proton and one neutron
Que (19): How many moles are there is 140 g of Si (atomic mass of silicon is 28)?
Que (20): Which is used in storage batteries?
Que (21): An element X forms an oxide X0 What is the valency of X?
Que (22): Which polymeric material is used for making bullet proof jacket?
D. none of these
Que (23): Which is the main ingredient in cement ?
A. Lime stone
Answer: Lime stone
Que (24): Which element is produced when concentrated cinnabar is roasted in the excess of air?
A. Argon (Ag)
C. Aluminium (Al)
D. Mercury (Hg)
Answer: Mercury (Hg)
Que (25): Which nuclides having the same number of neutrons but different number of protons or mass number?
D. none of these
Que (26): Which compound is known as white vitriol?
ther 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.