Undergraduate
Q. Which of the following is a characteristic of unsaturated hydrocarbons?
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A.
Only single bonds
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B.
Contains double or triple bonds
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C.
Higher boiling points
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D.
Less reactive
Solution
Unsaturated hydrocarbons contain double or triple bonds, making them more reactive than saturated hydrocarbons.
Correct Answer: B — Contains double or triple bonds
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Q. Which of the following is a characteristic property of ethers? (2019)
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A.
High boiling point
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B.
Solubility in water
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C.
Low reactivity
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D.
Acidic nature
Solution
Ethers are generally low in reactivity compared to alcohols and phenols, making them stable compounds.
Correct Answer: C — Low reactivity
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Q. Which of the following is a characteristic property of noble gases? (2019)
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A.
High reactivity
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B.
Colorless and odorless
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C.
Forming ionic bonds
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D.
High boiling points
Solution
Noble gases are colorless and odorless under standard conditions.
Correct Answer: B — Colorless and odorless
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Q. Which of the following is a characteristic reaction of phenols? (2021) 2021
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A.
Esterification
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B.
Nitration
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C.
Halogenation
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D.
Hydrogenation
Solution
Phenols undergo halogenation readily due to the electron-donating effect of the hydroxyl group.
Correct Answer: C — Halogenation
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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 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 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 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 ingredient in anti-inflammatory drugs? (2022)
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A.
Ibuprofen
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B.
Acetaminophen
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C.
Aspirin
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D.
All of the above
Solution
Ibuprofen, Acetaminophen, and Aspirin are all common ingredients in anti-inflammatory medications.
Correct Answer: D — All of the above
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Q. Which of the following is a common method for producing transgenic plants? (2022)
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A.
Microinjection
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B.
Agrobacterium-mediated transformation
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C.
Somatic cell nuclear transfer
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D.
CRISPR-Cas9
Solution
Agrobacterium-mediated transformation is a widely used method for producing transgenic plants by transferring genes into plant cells.
Correct Answer: B — Agrobacterium-mediated transformation
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Q. Which of the following is a common oxidation state of iron? (2023)
Solution
Iron commonly exhibits oxidation states of +2 and +3, with +3 being more prevalent in compounds.
Correct Answer: C — +3
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Q. Which of the following is a common preservative in food? (2019)
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A.
Sodium benzoate
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B.
Ethanol
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C.
Acetic acid
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D.
Benzene
Solution
Sodium benzoate is widely used as a food preservative to prevent spoilage.
Correct Answer: A — Sodium benzoate
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Q. Which of the following is a common respiratory disease characterized by inflammation of the airways? (2022)
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A.
Asthma
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B.
Pneumonia
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C.
Tuberculosis
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D.
Emphysema
Solution
Asthma is a chronic condition that causes inflammation and narrowing of the airways, leading to difficulty in breathing.
Correct Answer: A — Asthma
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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 sexually transmitted infections? (2019)
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A.
Headache
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B.
Fever
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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 symptom of STIs? (2019)
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A.
Headache
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B.
Fever
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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 use of caffeine? (2020)
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A.
Pain reliever
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B.
Stimulant
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C.
Antiseptic
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D.
Antibiotic
Solution
Caffeine is primarily used as a stimulant to increase alertness and reduce fatigue.
Correct Answer: B — Stimulant
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Q. Which of the following is a common use of glycerol in food? (2021)
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A.
Sweetener
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B.
Preservative
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C.
Thickening agent
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D.
All of the above
Solution
Glycerol is used in food as a sweetener, preservative, and thickening agent, making it versatile in food applications.
Correct Answer: D — All of the above
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Q. Which of the following is a common use of ketones?
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A.
Solvents
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B.
Preservatives
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C.
Fragrances
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D.
All of the above
Solution
Ketones are commonly used as solvents, preservatives, and fragrances.
Correct Answer: D — All of the above
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Q. Which of the following is a common use of phenol? (2022)
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A.
Disinfectant
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B.
Food preservative
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C.
Flavoring agent
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D.
Coloring agent
Solution
Phenol is widely used as a disinfectant due to its antimicrobial properties.
Correct Answer: A — Disinfectant
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Q. Which of the following is a common use of probiotics? (2023)
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A.
To treat infections
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B.
To improve gut health
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C.
To cause diseases
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D.
To produce antibiotics
Solution
Probiotics are beneficial bacteria that help improve gut health and can prevent infections.
Correct Answer: B — To improve gut health
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Q. Which of the following is a common use of PVC?
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A.
Clothing
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B.
Pipes
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C.
Food packaging
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D.
Adhesives
Solution
PVC (Polyvinyl Chloride) is commonly used in the production of pipes due to its durability and resistance to corrosion.
Correct Answer: B — Pipes
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Q. Which of the following is a common use of sulfur? (2022)
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A.
Fertilizers
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B.
Explosives
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C.
Rubber production
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D.
All of the above
Solution
Sulfur is used in fertilizers, explosives, and rubber production.
Correct Answer: D — All of the above
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Q. Which of the following is a common use of transition metals?
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A.
Insulators
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B.
Catalysts
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C.
Noble gases
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D.
Non-metals
Solution
Transition metals are commonly used as catalysts in various chemical reactions.
Correct Answer: B — Catalysts
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Q. Which of the following is a common use of yeast in food production? (2019)
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A.
Making cheese
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B.
Making bread
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C.
Making vinegar
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D.
Making yogurt
Solution
Yeast is commonly used in bread making due to its ability to ferment sugars and produce carbon dioxide.
Correct Answer: B — Making bread
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Q. Which of the following is a common vector used in gene cloning? (2019)
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A.
Plasmids
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B.
Ribosomes
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C.
Chromosomes
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D.
Nucleotides
Solution
Plasmids are commonly used as vectors in gene cloning because they can replicate independently within a host cell.
Correct Answer: A — Plasmids
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Q. Which of the following is a correct expression for electric current? (2022)
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A.
I = V/R
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B.
I = R/V
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C.
I = V × R
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D.
I = V + R
Solution
The correct expression for electric current is I = V/R, according to Ohm's law.
Correct Answer: A — I = V/R
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