Q. What is the primary oxidation state of chlorine in potassium chloride (KCl)?
Solution
In potassium chloride, chlorine has an oxidation state of -1.
Correct Answer: A — -1
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Q. What is the primary oxidation state of chlorine in sodium chloride (NaCl)?
Solution
In NaCl, chlorine has an oxidation state of -1.
Correct Answer: A — -1
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Q. What is the primary oxidation state of chromium in CrO3?
Solution
In CrO3, chromium has a primary oxidation state of +6.
Correct Answer: C — +6
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Q. What is the primary oxidation state of group 14 elements in their compounds?
Solution
Group 14 elements typically exhibit a +4 oxidation state in their compounds.
Correct Answer: B — +4
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Q. What is the primary oxidation state of manganese in KMnO4?
Solution
In KMnO4, manganese has an oxidation state of +7.
Correct Answer: D — +7
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Q. What is the primary oxidation state of manganese in MnO4-?
Solution
In MnO4-, manganese has an oxidation state of +7.
Correct Answer: D — +7
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Q. What is the primary oxidation state of sulfur in sulfuric acid (H2SO4)?
Solution
In sulfuric acid (H2SO4), sulfur has an oxidation state of +6.
Correct Answer: B — +6
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Q. What is the primary pollutant in photochemical smog?
-
A.
Carbon monoxide
-
B.
Nitrogen oxides
-
C.
Ozone
-
D.
Sulfur dioxide
Solution
Ozone is a key component of photochemical smog, formed by the reaction of sunlight with pollutants like nitrogen oxides.
Correct Answer: C — Ozone
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Q. What is the primary process involved in the adsorption of gases on solid surfaces?
-
A.
Diffusion
-
B.
Condensation
-
C.
Chemical reaction
-
D.
Van der Waals forces
Solution
Adsorption of gases on solid surfaces primarily occurs due to Van der Waals forces, which are weak intermolecular forces.
Correct Answer: D — Van der Waals forces
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Q. What is the primary product formed when hydrogen reacts with oxygen?
-
A.
Water
-
B.
Hydrogen peroxide
-
C.
Ozone
-
D.
Hydroxyl radical
Solution
The primary product of the reaction between hydrogen and oxygen is water (H2O).
Correct Answer: A — Water
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Q. What is the primary product of the complete combustion of hydrocarbons?
-
A.
Carbon monoxide
-
B.
Carbon dioxide
-
C.
Water
-
D.
Oxygen
Solution
The complete combustion of hydrocarbons primarily produces carbon dioxide and water.
Correct Answer: B — Carbon dioxide
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Q. What is the primary product of the hydrolysis of an ester?
-
A.
Alcohol
-
B.
Carboxylic acid
-
C.
Both alcohol and carboxylic acid
-
D.
None of the above
Solution
Hydrolysis of an ester produces both an alcohol and a carboxylic acid.
Correct Answer: C — Both alcohol and carboxylic acid
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Q. What is the primary product of the reaction between 1-chlorobutane and potassium cyanide?
-
A.
1-cyanobutane
-
B.
2-cyanobutane
-
C.
Butyronitrile
-
D.
Butyl cyanide
Solution
The reaction leads to the formation of 1-cyanobutane through nucleophilic substitution.
Correct Answer: A — 1-cyanobutane
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Q. What is the primary product of the reaction between a carboxylic acid and an alcohol in the presence of an acid catalyst?
-
A.
Aldehyde
-
B.
Ester
-
C.
Ketone
-
D.
Amide
Solution
The reaction between a carboxylic acid and an alcohol in the presence of an acid catalyst produces an ester.
Correct Answer: B — Ester
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Q. What is the primary product of the reaction between ethene and bromine?
-
A.
1,2-dibromoethane
-
B.
Bromoethane
-
C.
Ethane
-
D.
Bromobenzene
Solution
Ethene reacts with bromine to form 1,2-dibromoethane through an electrophilic addition mechanism.
Correct Answer: A — 1,2-dibromoethane
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Q. What is the primary product when 1-bromo-2-methylpropane reacts with KOH in ethanol?
-
A.
2-methylpropene
-
B.
1-methylpropene
-
C.
2-bromopropane
-
D.
no reaction
Solution
The reaction leads to the formation of 2-methylpropene through an elimination reaction.
Correct Answer: A — 2-methylpropene
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Q. What is the primary product when 1-chloropropane reacts with potassium tert-butoxide?
-
A.
Propene
-
B.
2-methylpropane
-
C.
1-butene
-
D.
No reaction
Solution
The reaction of 1-chloropropane with potassium tert-butoxide leads to the formation of propene via an elimination reaction.
Correct Answer: A — Propene
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Q. What is the primary product when a carboxylic acid is reduced with lithium aluminum hydride (LiAlH4)?
-
A.
Alcohol
-
B.
Aldehyde
-
C.
Ketone
-
D.
Ester
Solution
Lithium aluminum hydride reduces carboxylic acids to primary alcohols.
Correct Answer: A — Alcohol
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Q. What is the primary product when a carboxylic acid reacts with thionyl chloride (SOCl2)?
-
A.
Acid chloride
-
B.
Ester
-
C.
Alcohol
-
D.
Aldehyde
Solution
The primary product of the reaction between a carboxylic acid and thionyl chloride is an acid chloride.
Correct Answer: A — Acid chloride
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Q. What is the primary product when ammonia reacts with an alkyl halide?
-
A.
Amine
-
B.
Amide
-
C.
Alkane
-
D.
Alcohol
Solution
The primary product of the reaction between ammonia and an alkyl halide is an amine.
Correct Answer: A — Amine
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Q. What is the primary product when an alcohol is oxidized?
-
A.
Alkane
-
B.
Aldehyde
-
C.
Ketone
-
D.
Carboxylic acid
Solution
The primary product of the oxidation of a primary alcohol is an aldehyde.
Correct Answer: B — Aldehyde
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Q. What is the primary product when chlorobenzene is treated with sodium hydroxide at high temperature?
-
A.
Phenol
-
B.
Benzene
-
C.
Chlorobenzene
-
D.
Sodium chloride
Solution
Chlorobenzene reacts with sodium hydroxide at high temperature to form phenol.
Correct Answer: A — Phenol
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Q. What is the primary product when ethene reacts with water in the presence of an acid?
-
A.
Ethanol
-
B.
Ethane
-
C.
Ethanoic acid
-
D.
Ethylene glycol
Solution
The reaction of ethene with water in the presence of an acid (hydration) produces ethanol.
Correct Answer: A — Ethanol
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Q. What is the primary product when hydrogen reacts with oxygen?
-
A.
Water
-
B.
Hydrogen peroxide
-
C.
Ozone
-
D.
Hydroxyl radical
Solution
The primary product of the reaction between hydrogen and oxygen is water (H2O).
Correct Answer: A — Water
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Q. What is the primary product when magnesium reacts with dilute hydrochloric acid?
-
A.
Magnesium chloride
-
B.
Hydrogen gas
-
C.
Magnesium hydroxide
-
D.
Magnesium oxide
Solution
The primary products of the reaction between magnesium and dilute hydrochloric acid are magnesium chloride (MgCl2) and hydrogen gas (H2).
Correct Answer: A — Magnesium chloride
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Q. What is the primary reaction occurring in a lead-acid battery during discharge?
-
A.
Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O
-
B.
PbSO4 + 2H2O → Pb + PbO2 + 2H2SO4
-
C.
2Pb + 2H2SO4 → 2PbSO4 + H2
-
D.
PbO2 + 2H2SO4 → Pb + 2H2O + O2
Solution
During discharge, the primary reaction in a lead-acid battery is Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O.
Correct Answer: A — Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O
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Q. What is the primary reason for the +M effect of -OCH3?
-
A.
Inductive effect
-
B.
Resonance effect
-
C.
Steric hindrance
-
D.
Electronegativity
Solution
The +M effect of -OCH3 is primarily due to resonance effect, where the lone pairs on oxygen can delocalize into the aromatic ring.
Correct Answer: B — Resonance effect
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Q. What is the primary reason for the acidity of chloroacetic acid compared to acetic acid?
-
A.
Inductive effect
-
B.
Mesomeric effect
-
C.
Steric hindrance
-
D.
Hydrogen bonding
Solution
The inductive effect of the -Cl group in chloroacetic acid increases its acidity compared to acetic acid.
Correct Answer: A — Inductive effect
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Q. What is the primary reason for the color of transition metal complexes?
-
A.
Presence of unpaired electrons
-
B.
Crystal field splitting
-
C.
Ligand field theory
-
D.
All of the above
Solution
The color of transition metal complexes arises from the presence of unpaired electrons and the crystal field splitting of d-orbitals.
Correct Answer: D — All of the above
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Q. What is the primary reason for the color of transition metal compounds?
-
A.
Presence of unpaired electrons
-
B.
Ionic bonding
-
C.
Covalent bonding
-
D.
High electronegativity
Solution
The color of transition metal compounds arises from the presence of unpaired electrons and d-d transitions.
Correct Answer: A — Presence of unpaired electrons
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