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100+ Free Tamil Nadu HSE First Year Chemistry Practice Questions

Tamil Nadu Higher Secondary First Year (HSE +1 / Class 11) Chemistry under the Directorate of Government Examinations (DGE), Tamil Nadu practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: Tamil Nadu HSE First Year Chemistry Exam

10:00–1:15

Official March 2026 HSE theory sitting window including reading/verification time (dge.tn.gov.in timetable)

DGE TN HSE March 2026 public examination timetable

35/100

Minimum pass mark per subject under the HSE new pattern, subject to theory/practical floor rules

DGE HSE_E.pdf scheme of examination

3 hours

Approximate theory writing duration after reading and particulars verification in the public exam schedule

DGE TN HSE March 2026 timetable

DGE TN

Administered by the Directorate of Government Examinations, Chennai, for Tamil Nadu State Board Higher Secondary

dge.tn.gov.in

SCERT syllabus

Class 11 textbooks and syllabus prescribed by SCERT / School Education Department (Samacheer Kalvi)

DGE HSE scheme — syllabus prescribed by SCERT/DSE

English MCQ bank

This practice set is an English-language MCQ study adaptation, not the official mixed written paper

OpenExamPrep practice-content policy

₹150/₹200

School exam fee band for groups without/with practical subjects plus certificate/service charges (concessions apply)

DGE HSE_E.pdf school candidate fee table

Class 11

HSE First Year (+1) Chemistry covers SCERT Units 1–15 across Vol. I and Vol. II textbooks

Samacheer Kalvi Class 11 Chemistry textbooks

Free English MCQ practice for Tamil Nadu HSE +1 Chemistry (DGE). Official paper is mixed written theory on the Samacheer Kalvi Class 11 syllabus — this bank is a study adaptation, not a format simulation.

Sample Tamil Nadu HSE First Year Chemistry Practice Questions

Try these sample questions to test your Tamil Nadu HSE First Year Chemistry exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1One mole of any substance contains how many elementary entities?
A.6.022 × 10²²
B.6.022 × 10²³
C.6.022 × 10²⁴
D.3.011 × 10²³
Explanation: Avogadro’s number N_A = 6.022 × 10²³ mol⁻¹ is the number of particles in one mole of a substance.
2The SI unit of amount of substance is the:
A.gram
B.molecule
C.mole
D.atom
Explanation: The mole (mol) is the SI base unit for amount of substance.
3Empirical formula of a compound is CH₂O and its molar mass is 180 g mol⁻¹. The molecular formula is:
A.CH₂O
B.C₂H₄O₂
C.C₆H₁₂O₆
D.C₃H₆O₃
Explanation: Empirical formula mass of CH₂O = 12 + 2 + 16 = 30. n = 180/30 = 6. Molecular formula = (CH₂O)₆ = C₆H₁₂O₆.
4How many moles of CO₂ are produced when 2.0 mol of C₃H₈ burns completely? (C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O)
A.2 mol
B.3 mol
C.6 mol
D.5 mol
Explanation: From stoichiometry, 1 mol C₃H₈ → 3 mol CO₂. So 2.0 mol C₃H₈ → 6.0 mol CO₂.
5A sample of H₂SO₄ (M = 98 g mol⁻¹) has mass 49 g. Number of moles is:
A.0.25 mol
B.0.50 mol
C.1.0 mol
D.2.0 mol
Explanation: n = m/M = 49/98 = 0.50 mol.
6Oxidation number of Cr in K₂Cr₂O₇ is:
A.+3
B.+4
C.+6
D.+7
Explanation: Let Cr = x. 2(+1) + 2x + 7(−2) = 0 ⇒ 2 + 2x − 14 = 0 ⇒ 2x = 12 ⇒ x = +6.
7Molarity of a solution containing 0.5 mol of solute in 250 mL of solution is:
A.0.5 M
B.1.0 M
C.2.0 M
D.4.0 M
Explanation: M = n/V(L) = 0.5 / 0.250 = 2.0 mol L⁻¹.
8In a limiting-reagent problem, the limiting reagent is the reactant that:
A.has the largest mass
B.is present in excess
C.is completely consumed first
D.has the highest molar mass
Explanation: The limiting reagent is the reactant that is fully consumed first and thus limits product formation.
94.0 g of a metal oxide contains 3.2 g of metal. Equivalent mass of the metal (oxygen equivalent mass = 8) is:
A.8
B.16
C.32
D.4
Explanation: Mass of O combined = 4.0 − 3.2 = 0.8 g. Equivalent mass of metal = (mass metal / mass oxygen) × 8 = (3.2/0.8)×8 = 32.
10Which change is a chemical change?
A.Melting of ice
B.Boiling of water
C.Rusting of iron
D.Sublimation of iodine
Explanation: Rusting forms new substances (iron oxides/hydroxides) and is a chemical change. The others are phase changes.

About the Tamil Nadu HSE First Year Chemistry Practice Questions

Verified exam format metadata for Tamil Nadu Higher Secondary First Year (HSE +1 / Class 11) Chemistry under the Directorate of Government Examinations (DGE), Tamil Nadu is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.