Q. Which reagent is commonly used to test for the presence of phenols?
-
A.
Bromine water
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B.
Sodium dichromate
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C.
Fehling's solution
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D.
Tollens' reagent
Solution
Bromine water is used to test for phenols, as they will decolorize bromine water.
Correct Answer: A — Bromine water
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Q. Which reagent is used to convert an alcohol to an alkyl halide? (2023) 2023
-
A.
PCl5
-
B.
NaOH
-
C.
H2SO4
-
D.
KMnO4
Solution
PCl5 is commonly used to convert alcohols to alkyl halides through a substitution reaction.
Correct Answer: A — PCl5
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Q. Which state of matter has a definite shape and volume? (2017)
-
A.
Solid
-
B.
Liquid
-
C.
Gas
-
D.
Plasma
Solution
Solids have a definite shape and volume due to their closely packed particles.
Correct Answer: A — Solid
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Q. Which state of matter has the highest kinetic energy?
-
A.
Solid
-
B.
Liquid
-
C.
Gas
-
D.
Plasma
Solution
Plasma has the highest kinetic energy as it consists of ionized particles moving freely.
Correct Answer: D — Plasma
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Q. Which transition metal has the electron configuration [Ar] 3d6 4s2?
-
A.
Titanium
-
B.
Iron
-
C.
Nickel
-
D.
Cobalt
Solution
Iron (Fe) has the electron configuration [Ar] 3d6 4s2.
Correct Answer: B — Iron
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Q. Which transition metal has the highest melting point?
-
A.
Iron
-
B.
Tungsten
-
C.
Nickel
-
D.
Copper
Solution
Tungsten (W) has the highest melting point among transition metals.
Correct Answer: B — Tungsten
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Q. Which transition metal is known for forming complex ions with a coordination number of 6?
-
A.
Copper
-
B.
Nickel
-
C.
Cobalt
-
D.
Zinc
Solution
Cobalt commonly forms complex ions with a coordination number of 6, such as in [Co(NH3)6]3+.
Correct Answer: C — Cobalt
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Q. Which transition metal is known for its catalytic properties in the Haber process?
-
A.
Iron
-
B.
Nickel
-
C.
Copper
-
D.
Cobalt
Solution
Iron is used as a catalyst in the Haber process for ammonia synthesis.
Correct Answer: A — Iron
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Q. Which type of biomolecule is glucose?
-
A.
Protein
-
B.
Lipid
-
C.
Carbohydrate
-
D.
Nucleic Acid
Solution
Glucose is a simple sugar and is classified as a carbohydrate.
Correct Answer: C — Carbohydrate
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