Major Competitive Exams
Q. Which of the following is a common analgesic? (2021)
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A.
Ibuprofen
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B.
Aspirin
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C.
Paracetamol
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D.
All of the above
Solution
All of the options listed (Ibuprofen, Aspirin, and Paracetamol) are common analgesics used to relieve pain.
Correct Answer: D — All of the above
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Q. Which of the following is a common antiseptic used in households?
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A.
Ethanol
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B.
Acetic acid
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C.
Sodium chloride
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D.
Sodium bicarbonate
Solution
Ethanol is widely used as an antiseptic in households for disinfecting purposes.
Correct Answer: A — Ethanol
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Q. Which of the following is a common application of adsorption?
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A.
Catalysis
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B.
Separation of gases
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C.
Water purification
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D.
All of the above
Solution
Adsorption is widely used in catalysis, gas separation, and water purification processes.
Correct Answer: D — All of the above
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Q. Which of the following is a common application of baking soda in cooking?
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A.
Thickening agent
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B.
Leavening agent
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C.
Flavor enhancer
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D.
Preservative
Solution
Baking soda acts as a leavening agent, helping baked goods rise by producing carbon dioxide.
Correct Answer: B — Leavening agent
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Q. Which of the following is a common application of biotechnology in the food industry? (2020)
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A.
Fermentation
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B.
Genetic modification
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C.
Food preservation
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D.
All of the above
Solution
Biotechnology is widely used in the food industry for fermentation, genetic modification, and food preservation.
Correct Answer: D — All of the above
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Q. Which of the following is a common application of digital modulation?
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A.
Television broadcasting
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B.
AM radio
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C.
Satellite communication
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D.
Analog audio transmission
Solution
Digital modulation is commonly used in satellite communication.
Correct Answer: C — Satellite communication
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Q. Which of the following is a common application of Phase Shift Keying (PSK)?
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A.
Television broadcasting
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B.
Satellite communication
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C.
AM radio
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D.
FM radio
Solution
Phase Shift Keying (PSK) is commonly used in satellite communication.
Correct Answer: B — Satellite communication
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Q. Which of the following is a common application of semiconductors? (2019)
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A.
Light bulbs
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B.
Transistors
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C.
Resistors
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D.
Capacitors
Solution
Transistors are a common application of semiconductors, used in various electronic devices.
Correct Answer: B — Transistors
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Q. Which of the following is a common challenge faced during team formation?
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A.
Establishing clear objectives
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B.
Balancing individual and team goals
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C.
Encouraging participation from all members
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D.
Creating a positive team culture
Solution
Balancing individual and team goals can be challenging as members may have personal objectives that conflict with team aims.
Correct Answer: B — Balancing individual and team goals
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Q. Which of the following is a common electrophile in electrophilic aromatic substitution?
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A.
Br2
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B.
H2O
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C.
NaOH
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D.
CH3OH
Solution
Bromine (Br2) can act as an electrophile in the presence of a catalyst like FeBr3 during electrophilic aromatic substitution.
Correct Answer: A — Br2
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Q. Which of the following is a common electrophile in electrophilic aromatic substitution reactions?
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A.
Bromine
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B.
Hydrogen
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C.
Water
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D.
Methane
Solution
Bromine, often in the presence of a catalyst like FeBr3, acts as a common electrophile in electrophilic aromatic substitution reactions.
Correct Answer: A — Bromine
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Q. Which of the following is a common emulsifier used in food products? (2022)
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A.
Lecithin
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B.
Sorbitol
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C.
Glycerol
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D.
Glucose
Solution
Lecithin is a common emulsifier that helps to mix oil and water in food products.
Correct Answer: A — Lecithin
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Q. Which of the following is a common household disinfectant?
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A.
Bleach
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B.
Vinegar
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C.
Baking soda
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D.
Salt
Solution
Bleach is widely used as a disinfectant to kill bacteria and viruses.
Correct Answer: A — Bleach
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Q. Which of the following is a common method for synthesizing aromatic compounds?
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A.
Friedel-Crafts alkylation
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B.
Hydrogenation
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C.
Dehydration
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D.
Oxidation
Solution
Friedel-Crafts alkylation is a common method used to synthesize aromatic compounds by introducing alkyl groups onto the aromatic ring.
Correct Answer: A — Friedel-Crafts alkylation
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Q. Which of the following is a common method for the synthesis of aromatic compounds?
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A.
Hydrogenation
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B.
Dehydrogenation
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C.
Electrophilic substitution
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D.
Nucleophilic addition
Solution
Electrophilic substitution is a common method for synthesizing aromatic compounds by introducing new substituents onto the aromatic ring.
Correct Answer: C — Electrophilic substitution
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Q. Which of the following is a common method to measure the surface area of adsorbents?
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A.
TGA
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B.
BET method
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C.
XRD
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D.
FTIR
Solution
The BET method (Brunauer-Emmett-Teller) is commonly used to measure the surface area of adsorbents.
Correct Answer: B — BET method
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Q. Which of the following is a common method to measure the surface area of an adsorbent?
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A.
TGA
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B.
BET method
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C.
XRD
-
D.
FTIR
Solution
The BET method (Brunauer-Emmett-Teller) is commonly used to measure the surface area of adsorbents.
Correct Answer: B — BET method
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Q. Which of the following is a common oxidation state of Chromium?
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A.
+2
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B.
+3
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C.
+6
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D.
All of the above
Solution
Chromium can exhibit multiple oxidation states including +2, +3, and +6.
Correct Answer: D — All of the above
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Q. Which of the following is a common oxidizing agent?
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A.
H2O2
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B.
NaCl
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C.
CH4
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D.
C6H12O6
Solution
Hydrogen peroxide (H2O2) is a well-known oxidizing agent.
Correct Answer: A — H2O2
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Q. Which of the following is a common preservative used in food?
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A.
Sodium chloride
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B.
Sodium benzoate
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C.
Sucrose
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D.
Vinegar
Solution
Sodium benzoate is commonly used as a preservative to inhibit the growth of bacteria and fungi.
Correct Answer: B — Sodium benzoate
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Q. Which of the following is a common property of group 14 elements?
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A.
They are all gases
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B.
They can form multiple oxidation states
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C.
They are all nonmetals
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D.
They have low melting points
Solution
Group 14 elements can exhibit multiple oxidation states, such as +4 and +2.
Correct Answer: B — They can form multiple oxidation states
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Q. Which of the following is a common reason for partners to enter into a partnership?
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A.
To avoid paying taxes
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B.
To share risks and responsibilities
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C.
To limit their business exposure
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D.
To eliminate competition
Solution
Partners often enter into partnerships to share risks and responsibilities associated with running a business.
Correct Answer: B — To share risks and responsibilities
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Q. Which of the following is a common source of omega-3 fatty acids? (2022)
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A.
Olive oil
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B.
Fish oil
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C.
Butter
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D.
Coconut oil
Solution
Fish oil is a rich source of omega-3 fatty acids, which are important for heart health and brain function.
Correct Answer: B — Fish oil
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Q. Which of the following is a common source of random error? (2023)
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A.
Instrument calibration
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B.
Environmental conditions
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C.
Human reaction time
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D.
Systematic bias
Solution
Human reaction time can introduce variability in measurements, leading to random errors.
Correct Answer: C — Human reaction time
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Q. Which of the following is a common symptom of diabetes? (2019)
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A.
Increased thirst
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B.
Skin rash
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C.
Headache
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D.
Nausea
Solution
Increased thirst is a common symptom of diabetes due to high blood sugar levels.
Correct Answer: A — Increased thirst
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Q. Which of the following is a common symptom of pregnancy? (2020)
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A.
Increased appetite
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B.
Weight loss
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C.
Frequent headaches
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D.
Nausea
Solution
Nausea, often referred to as morning sickness, is a common symptom experienced during early pregnancy.
Correct Answer: D — Nausea
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Q. Which of the following is a common symptom of STIs? (2019)
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A.
Headache
-
B.
Fever
-
C.
Unusual discharge
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D.
Nausea
Solution
Unusual discharge is a common symptom associated with many sexually transmitted infections.
Correct Answer: C — Unusual discharge
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Q. Which of the following is a common test for the presence of aromatic compounds?
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A.
Bromine water test
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B.
Baeyer test
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C.
Tollen's test
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D.
Benzene test
Solution
The bromine water test can be used to detect unsaturation; however, aromatic compounds do not react with bromine water, indicating their stability.
Correct Answer: A — Bromine water test
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Q. Which of the following is a common use of aspirin in everyday life?
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A.
Pain relief
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B.
Antibiotic
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C.
Antidepressant
-
D.
Antihistamine
Solution
Aspirin is widely used for pain relief due to its analgesic properties.
Correct Answer: A — Pain relief
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Q. Which of the following is a common use of aspirin?
-
A.
Pain relief
-
B.
Antibiotic
-
C.
Antidepressant
-
D.
Antihistamine
Solution
Aspirin is commonly used for pain relief and to reduce inflammation.
Correct Answer: A — Pain relief
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