Chemistry (Secondary & College Level)

Change Setup
📘 Comprehensive Syllabus & Examination Guide

Chemistry (Secondary & College Level)

Official curriculum roadmap, subject/topic distribution, negative marking rules, pacing guidelines, and solved sample questions.

🎯 Mapped Subjects & Topic Question Distribution

Total Question Pool 100%
280 MCQs
Combined Active Syllabus
Chemistry (Secondary & College Level)
280 MCQs
Topic Pool
📊 Question Pool Structure
280 MCQs across fundamental, intermediate, and advanced concept tiers.
⚡ Recommended Pacing
45 to 60 seconds per MCQ. Flag complex problems and preserve 10 minutes for final revision.
⚖️ Scoring & Negative Marking
+1 mark per correct answer. In competitive tests with negative marking, -0.25 applies for incorrect guesses.

💡 Strategic Preparation & Exam Hall Guidelines

To maximize your score on Chemistry (Secondary & College Level), candidates are advised to follow a structured three-pass approach. In the First Pass, solve all direct recall and formula-based questions within 30 seconds each to secure foundational marks. In the Second Pass, tackle multi-step analytical and quantitative reasoning problems. In the Third Pass, review marked questions and verify calculations.

Practice with the interactive player below to evaluate your speed and accuracy under real exam pressure. Every question features full mathematical formulas, step-by-step worked solutions, and conceptual explanations vetted by Apex Rankers Academy subject matter specialists.

Ready to test your knowledge? Launch interactive 1-by-1 practice with instant feedback, bookmarking, and step-by-step rationales.
Solved Blueprint Examples

📝 Pre-Rendered Solved Sample Questions & Detailed Solutions

Showing 10 solved representative questions

Review the solved problems below to understand question phrasing, answer choices, and step-by-step solution logic prior to starting the full interactive practice drill:

Sample Question 1
Chemistry (Secondary & College Level) EASY • Chemistry (Secondary & College Level)
What catalyst is industrially used in the Contact Process for manufacturing Sulfuric Acid (H2SO4)?
A Vanadium(V) oxide (V2O5)
B Finely divided Iron (Fe)
C Nickel (Ni)
D Platinum gauze
✓ Correct Answer: A - Vanadium(V) oxide (V2O5)
📖 Step-by-Step Solution & Conceptual Rationale:
V2O5 catalyzes the oxidation of SO2 to SO3 at 450 °C in the Contact Process.
Sample Question 2
Chemistry (Secondary & College Level) EASY • Chemistry (Secondary & College Level)
What catalyst is employed in the catalytic hydrogenation of vegetable oil to make margarine / vegetable ghee?
A Finely divided Nickel (Ni) at 150–200 °C
B Copper (Cu)
C Iron oxide
D Zinc dust
✓ Correct Answer: A - Finely divided Nickel (Ni) at 150–200 °C
📖 Step-by-Step Solution & Conceptual Rationale:
Nickel catalyst facilitates addition of H2 across alkene double bonds in fatty acids.
Sample Question 3
Chemistry (Secondary & College Level) EASY • Chemistry (Secondary & College Level)
Which gas is commonly known as 'Laughing Gas' in clinical anesthesia and propellant applications?
A Dinitrogen Monoxide (Nitrous Oxide - N2O)
B Nitrogen Dioxide (NO2)
C Nitric Oxide (NO)
D Ammonia (NH3)
✓ Correct Answer: A - Dinitrogen Monoxide (Nitrous Oxide - N2O)
📖 Step-by-Step Solution & Conceptual Rationale:
N2O is an anesthetic and analgesic inhalation gas widely termed laughing gas.
Sample Question 4
Chemistry (Secondary & College Level) MEDIUM • Chemistry (Secondary & College Level)
What is the primary chemical component of Plaster of Paris?
A Calcium Sulfate Hemihydrate (CaSO4 . 1/2 H2O)
B Calcium Carbonate (CaCO3)
C Calcium Hydroxide (Ca(OH)2)
D Calcium Oxide (CaO)
✓ Correct Answer: A - Calcium Sulfate Hemihydrate (CaSO4 . 1/2 H2O)
📖 Step-by-Step Solution & Conceptual Rationale:
Plaster of Paris is produced by heating gypsum (CaSO4 . 2H2O) to form calcium sulfate hemihydrate.
Sample Question 5
Chemistry (Secondary & College Level) EASY • Chemistry (Secondary & College Level)
What functional group is characteristic of Carboxylic Acids, Esters, and Ketones respectively?
A -COOH, -COOR, and -C(=O)-
B -CHO, -OH, and -NH2
C -CONH2, -CN, and -SH
D -O-, -X, and -NO2
✓ Correct Answer: A - -COOH, -COOR, and -C(=O)-
📖 Step-by-Step Solution & Conceptual Rationale:
Carboxylic acids contain carboxyl (-COOH), esters contain alkoxycarbonyl (-COOR), and ketones contain carbonyl between carbons (-C(=O)-).
Sample Question 6
Chemistry (Secondary & College Level) MEDIUM • Chemistry (Secondary & College Level)
What reagent is used to distinguish Aldehydes from Ketones via formation of a shiny silver mirror?
A Tollens' Reagent (Ammoniacal Silver Nitrate)
B Benedict's Solution
C Lucas Reagent
D Fehling's Solution B
✓ Correct Answer: A - Tollens' Reagent (Ammoniacal Silver Nitrate)
📖 Step-by-Step Solution & Conceptual Rationale:
Aldehydes reduce Tollens' reagent [Ag(NH3)2]+ to metallic silver (silver mirror), while ketones do not oxidize easily.
Sample Question 7
Chemistry (Secondary & College Level) MEDIUM • Chemistry (Secondary & College Level)
What test distinguishes primary, secondary, and tertiary alcohols based on the appearance of cloudiness with ZnCl2/HCl?
A Lucas Test
B Biuret Test
C Molisch Test
D Iodoform Test
✓ Correct Answer: A - Lucas Test
📖 Step-by-Step Solution & Conceptual Rationale:
Lucas reagent (anhydrous ZnCl2 in concentrated HCl) forms insoluble alkyl chloride immediately for tertiary alcohols, in 5 mins for secondary, and not at room temp for primary.
Sample Question 8
Chemistry (Secondary & College Level) HARD • Chemistry (Secondary & College Level)
What is the major organic product formed when Ethanol is dehydrated with concentrated H2SO4 at 170 °C?
A Ethene (Ethylene - CH2=CH2)
B Diethyl ether (C2H5-O-C2H5)
C Ethanoic acid
D Ethyl hydrogen sulfate
✓ Correct Answer: A - Ethene (Ethylene - CH2=CH2)
📖 Step-by-Step Solution & Conceptual Rationale:
At 170 °C, concentrated sulfuric acid undergoes intramolecular elimination to form ethene. (At 140 °C, intermolecular dehydration yields diethyl ether).
Sample Question 9
Chemistry (Secondary & College Level) EASY • Chemistry (Secondary & College Level)
Which law of chemical combination states that when elements combine, they do so in simple whole-number mass ratios?
A Law of Definite Proportions (Proust's Law)
B Law of Conservation of Mass
C Dalton's Law of Partial Pressures
D Henry's Law
✓ Correct Answer: A - Law of Definite Proportions (Proust's Law)
📖 Step-by-Step Solution & Conceptual Rationale:
Proust's law states that a chemical compound always contains exactly the same proportion of elements by mass.
Sample Question 10
Chemistry (Secondary & College Level) EASY • Chemistry (Secondary & College Level)
What is the oxidation state of Chromium in Potassium Dichromate (K2Cr2O7)?
A +6
B +3
C +7
D +4
✓ Correct Answer: A - +6
📖 Step-by-Step Solution & Conceptual Rationale:
In K2Cr2O7: 2(+1) + 2(Cr) + 7(-2) = 0 => 2Cr - 12 = 0 => Cr = +6.
Practice All 280 Questions Interactively Test your knowledge in real-time with continuous progress saving, instant scoring, and performance analytics.