Q. Which of the following materials is most likely to exhibit elastic behavior?
A.
Rubber
B.
Glass
C.
Steel
D.
Plastic
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Solution
Steel is known for its elastic properties, allowing it to return to its original shape after deformation.
Correct Answer: C — Steel
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Q. Which of the following materials is the best conductor of heat?
A.
Wood
B.
Air
C.
Copper
D.
Glass
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Solution
Copper is known for its excellent thermal conductivity, making it the best conductor among the given options.
Correct Answer: C — Copper
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Q. Which of the following materials is typically a good conductor of electricity?
A.
Rubber
B.
Copper
C.
Glass
D.
Wood
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Solution
Copper is a good conductor of electricity, while rubber, glass, and wood are insulators.
Correct Answer: B — Copper
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Q. Which of the following materials transmits sound the fastest?
A.
Air
B.
Water
C.
Steel
D.
Wood
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Solution
Sound travels fastest in solids like steel due to closely packed molecules.
Correct Answer: C — Steel
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Q. Which of the following materials typically has the highest Young's modulus?
A.
Rubber
B.
Steel
C.
Wood
D.
Plastic
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Solution
Steel typically has a much higher Young's modulus compared to rubber, wood, and plastic.
Correct Answer: B — Steel
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Q. Which of the following materials would have the highest Young's modulus?
A.
Rubber
B.
Steel
C.
Wood
D.
Plastic
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Solution
Steel has a much higher Young's modulus compared to rubber, wood, and plastic, indicating it is much stiffer.
Correct Answer: B — Steel
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Q. Which of the following materials would sound travel fastest through? (2019)
A.
Air
B.
Water
C.
Steel
D.
Wood
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Solution
Sound travels fastest through solids like steel due to closely packed molecules.
Correct Answer: C — Steel
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Q. Which of the following matrices is symmetric? (2023)
A.
A = [[1, 2], [3, 4]]
B.
B = [[1, 2], [2, 1]]
C.
C = [[1, 0], [0, 1]]
D.
D = [[1, 2, 3], [4, 5, 6]]
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Solution
A symmetric matrix is one that is equal to its transpose. Matrix B is symmetric because B = B^T.
Correct Answer: B — B = [[1, 2], [2, 1]]
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Q. Which of the following measures is NOT a measure of dispersion?
A.
Range
B.
Variance
C.
Mean
D.
Standard Deviation
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Solution
Mean is a measure of central tendency, not dispersion.
Correct Answer: C — Mean
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Q. Which of the following measures of dispersion is affected by extreme values?
A.
Range
B.
Interquartile Range
C.
Variance
D.
Standard Deviation
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Solution
Range is affected by extreme values as it is calculated as the difference between the maximum and minimum values.
Correct Answer: A — Range
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Q. Which of the following metals can be used as an anode in a Daniell cell?
A.
Copper
B.
Zinc
C.
Silver
D.
Lead
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Solution
Zinc is used as the anode in a Daniell cell.
Correct Answer: B — Zinc
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Q. Which of the following metals can be used as an anode in electrolysis?
A.
Copper
B.
Gold
C.
Aluminum
D.
Silver
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Solution
Aluminum is commonly used as an anode in electrolysis due to its high reactivity.
Correct Answer: C — Aluminum
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Q. Which of the following metals cannot be used as an anode in a galvanic cell?
A.
Zinc
B.
Copper
C.
Lead
D.
Silver
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Solution
Copper cannot be used as an anode in a galvanic cell because it is less reactive than zinc.
Correct Answer: B — Copper
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Q. Which of the following metals has the highest standard reduction potential? (2019)
A.
Gold
B.
Silver
C.
Copper
D.
Zinc
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Solution
Gold has the highest standard reduction potential among the given metals.
Correct Answer: A — Gold
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Q. Which of the following metals is known to be the least reactive?
A.
Gold
B.
Sodium
C.
Potassium
D.
Calcium
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Solution
Gold is known to be the least reactive metal, making it resistant to corrosion and oxidation.
Correct Answer: A — Gold
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Q. Which of the following metals is known to be the most malleable?
A.
Iron
B.
Gold
C.
Lead
D.
Copper
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Solution
Gold is known to be the most malleable metal, capable of being drawn into extremely thin sheets.
Correct Answer: B — Gold
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Q. Which of the following metals is the best conductor of electricity?
A.
Copper
B.
Aluminum
C.
Gold
D.
Silver
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Solution
Silver is the best conductor of electricity among metals due to its high electron mobility.
Correct Answer: D — Silver
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Q. Which of the following metals is used in making electrical wires?
A.
Zinc
B.
Copper
C.
Aluminum
D.
Iron
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Solution
Copper is widely used in electrical wiring due to its excellent conductivity.
Correct Answer: B — Copper
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Q. Which of the following metals reacts vigorously with water?
A.
Copper
B.
Sodium
C.
Iron
D.
Gold
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Solution
Sodium reacts vigorously with water to produce sodium hydroxide and hydrogen gas.
Correct Answer: B — Sodium
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Q. Which of the following methods can help reduce zero error? (2022)
A.
Using a different measurement technique
B.
Regular calibration of instruments
C.
Taking more measurements
D.
Ignoring the error
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Solution
Regular calibration of instruments can help reduce zero error by ensuring that the instrument reads zero accurately.
Correct Answer: B — Regular calibration of instruments
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Q. Which of the following methods is considered a permanent form of contraception? (2022)
A.
IUD
B.
Vasectomy
C.
Condoms
D.
Birth control pills
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Solution
Vasectomy is a surgical procedure that provides a permanent form of contraception for males.
Correct Answer: B — Vasectomy
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Q. Which of the following methods is NOT typically used for group identification? (2019)
A.
Mass spectrometry
B.
Nuclear magnetic resonance
C.
Filtration
D.
Infrared spectroscopy
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Solution
Filtration is a physical separation method and does not identify chemical groups, unlike the other methods listed.
Correct Answer: C — Filtration
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Q. Which of the following methods is used to purify colloidal solutions? (2020)
A.
Filtration
B.
Centrifugation
C.
Dialysis
D.
Evaporation
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Solution
Dialysis is used to purify colloidal solutions by allowing the solvent and small solutes to pass through a semi-permeable membrane while retaining the colloidal particles.
Correct Answer: C — Dialysis
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Q. Which of the following methods is used to stabilize colloidal solutions? (2023)
A.
Electrolysis
B.
Coagulation
C.
Dialysis
D.
Electrophoresis
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Solution
Electrophoresis is used to stabilize colloidal solutions by applying an electric field to separate charged particles.
Correct Answer: D — Electrophoresis
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Q. Which of the following microbes is commonly used in the fermentation of food? (2021)
A.
Bacteria
B.
Viruses
C.
Fungi
D.
All of the above
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Solution
All of the mentioned microbes can be involved in fermentation processes, but bacteria and fungi are the most common.
Correct Answer: D — All of the above
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Q. Which of the following microbes is commonly used in the fermentation of yogurt? (2021)
A.
Lactobacillus
B.
Escherichia coli
C.
Staphylococcus
D.
Bacillus subtilis
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Solution
Lactobacillus is the primary bacterium used in the fermentation process to produce yogurt.
Correct Answer: A — Lactobacillus
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Q. Which of the following microbes is used in the production of antibiotics? (2020)
A.
Bacteria
B.
Viruses
C.
Fungi
D.
Protozoa
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Solution
Fungi, particularly the genus Penicillium, are used in the production of antibiotics like penicillin.
Correct Answer: C — Fungi
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Q. Which of the following microbes is used in the production of biofertilizers? (2022)
A.
Rhizobium
B.
Streptococcus
C.
Clostridium
D.
Bacillus cereus
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Solution
Rhizobium is a bacterium that forms symbiotic relationships with legumes and is used in biofertilizers for nitrogen fixation.
Correct Answer: A — Rhizobium
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Q. Which of the following microbes is used in the production of biofuels? (2023)
A.
Bacteria
B.
Viruses
C.
Fungi
D.
All of the above
Show solution
Solution
Bacteria are commonly used in the production of biofuels through fermentation processes.
Correct Answer: A — Bacteria
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Q. Which of the following microbes is used in the production of yogurt? (2021)
A.
Lactobacillus
B.
Escherichia coli
C.
Staphylococcus
D.
Bacillus subtilis
Show solution
Solution
Lactobacillus is the primary bacterium used in the fermentation of milk to produce yogurt.
Correct Answer: A — Lactobacillus
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