Q. Which of the following is a characteristic property of p-block elements?
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A.
High melting points
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B.
Good conductors of electricity
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C.
Form covalent bonds
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D.
High density
Solution
P-block elements typically form covalent bonds due to their electronegativity and valence electron configuration.
Correct Answer: C — Form covalent bonds
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Q. Which of the following is a characteristic property of phenols?
-
A.
Basicity
-
B.
Acidity
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C.
Neutrality
-
D.
Inertness
Solution
Phenols are weakly acidic due to the presence of the hydroxyl group attached to the aromatic ring.
Correct Answer: B — Acidity
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Q. Which of the following is a characteristic property of s-block elements?
-
A.
Form covalent bonds
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B.
Form ionic bonds
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C.
Have high electronegativity
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D.
Are gases at room temperature
Solution
S-block elements typically form ionic bonds due to their tendency to lose electrons.
Correct Answer: B — Form ionic bonds
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Q. Which of the following is a characteristic property of transition metals?
-
A.
High electronegativity
-
B.
Variable oxidation states
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C.
Low melting points
-
D.
Non-conductivity
Solution
Transition metals exhibit variable oxidation states due to the involvement of d-orbitals in bonding.
Correct Answer: B — Variable oxidation states
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Q. Which of the following is a characteristic reaction of alcohols?
-
A.
Nitration
-
B.
Esterification
-
C.
Halogenation
-
D.
Oxidation
Solution
Alcohols undergo esterification when they react with carboxylic acids to form esters.
Correct Answer: B — Esterification
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Q. Which of the following is a characteristic reaction of aldehydes?
-
A.
Reduction to alcohols
-
B.
Formation of esters
-
C.
Dehydration
-
D.
Nitration
Solution
Aldehydes can be reduced to alcohols, which is a characteristic reaction of this functional group.
Correct Answer: A — Reduction to alcohols
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Q. Which of the following is a characteristic reaction of alkanes?
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A.
Nucleophilic substitution
-
B.
Electrophilic addition
-
C.
Free radical halogenation
-
D.
Hydrogenation
Solution
Free radical halogenation is a characteristic reaction of alkanes.
Correct Answer: C — Free radical halogenation
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Q. Which of the following is a characteristic reaction of alkenes?
-
A.
Hydrogenation
-
B.
Hydrolysis
-
C.
Oxidation
-
D.
Reduction
Solution
Alkenes undergo hydrogenation, where they react with hydrogen in the presence of a catalyst.
Correct Answer: A — Hydrogenation
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Q. Which of the following is a characteristic reaction of amines?
-
A.
Nitration
-
B.
Acylation
-
C.
Halogenation
-
D.
Oxidation
Solution
Acylation is a characteristic reaction of amines, where they react with acyl chlorides to form amides.
Correct Answer: B — Acylation
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Q. Which of the following is a characteristic reaction of carboxylic acids?
-
A.
Formation of esters
-
B.
Formation of amides
-
C.
Decarboxylation
-
D.
All of the above
Solution
Carboxylic acids can undergo esterification, amide formation, and decarboxylation, making 'All of the above' correct.
Correct Answer: D — All of the above
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Q. Which of the following is a characteristic reaction of ethers?
-
A.
Hydrolysis
-
B.
Oxidation
-
C.
Nucleophilic substitution
-
D.
Dehydration
Solution
Ethers undergo nucleophilic substitution reactions under strong acidic conditions.
Correct Answer: C — Nucleophilic substitution
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Q. Which of the following is a characteristic reaction of haloalkanes?
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A.
Electrophilic addition
-
B.
Nucleophilic substitution
-
C.
Free radical substitution
-
D.
Hydrogenation
Solution
Nucleophilic substitution is a characteristic reaction of haloalkanes, where a nucleophile replaces the halogen atom.
Correct Answer: B — Nucleophilic substitution
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Q. Which of the following is a characteristic reaction of haloarenes?
-
A.
Nucleophilic substitution
-
B.
Electrophilic substitution
-
C.
Hydrogenation
-
D.
Dehydrohalogenation
Solution
Haloarenes typically undergo nucleophilic substitution reactions due to the presence of the aromatic ring.
Correct Answer: B — Electrophilic substitution
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Q. Which of the following is a characteristic reaction of ketones?
-
A.
Oxidation to carboxylic acids
-
B.
Reduction to alcohols
-
C.
Formation of hemiacetals
-
D.
Formation of aldehydes
Solution
Ketones can react with alcohols to form hemiacetals, which is a characteristic reaction.
Correct Answer: C — Formation of hemiacetals
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Q. Which of the following is a characteristic reaction of phenols?
-
A.
Formation of esters
-
B.
Formation of ethers
-
C.
Electrophilic substitution
-
D.
Reduction to alcohols
Solution
Phenols undergo electrophilic substitution reactions due to the presence of the hydroxyl group, which activates the benzene ring.
Correct Answer: C — Electrophilic substitution
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Q. Which of the following is a colligative property?
-
A.
Boiling point elevation
-
B.
Density
-
C.
Viscosity
-
D.
Color
Solution
Boiling point elevation is a colligative property that depends on the number of solute particles in a solution.
Correct Answer: A — Boiling point elevation
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Q. Which of the following is a common antiseptic used in households?
-
A.
Ethanol
-
B.
Acetic acid
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C.
Sodium chloride
-
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?
-
A.
Catalysis
-
B.
Separation of gases
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C.
Water purification
-
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?
-
A.
Thickening agent
-
B.
Leavening agent
-
C.
Flavor enhancer
-
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 digital modulation?
-
A.
Television broadcasting
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B.
AM radio
-
C.
Satellite communication
-
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)?
-
A.
Television broadcasting
-
B.
Satellite communication
-
C.
AM radio
-
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 electrophile in electrophilic aromatic substitution reactions?
-
A.
Bromine
-
B.
Hydrogen
-
C.
Water
-
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 electrophile in electrophilic aromatic substitution?
-
A.
Br2
-
B.
H2O
-
C.
NaOH
-
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 household disinfectant?
-
A.
Bleach
-
B.
Vinegar
-
C.
Baking soda
-
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?
-
A.
Friedel-Crafts alkylation
-
B.
Hydrogenation
-
C.
Dehydration
-
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?
-
A.
Hydrogenation
-
B.
Dehydrogenation
-
C.
Electrophilic substitution
-
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?
-
A.
TGA
-
B.
BET method
-
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 method to measure the surface area of an adsorbent?
-
A.
TGA
-
B.
BET method
-
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?
-
A.
+2
-
B.
+3
-
C.
+6
-
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?
-
A.
H2O2
-
B.
NaCl
-
C.
CH4
-
D.
C6H12O6
Solution
Hydrogen peroxide (H2O2) is a well-known oxidizing agent.
Correct Answer: A — H2O2
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