HSC 2026 Chemistry 2nd Paper MCQ Solution - English Version (All Boards)
Introduction: Welcome to all HSC 2026 examinees! We have brought you the 100% accurate MCQ solution for your Chemistry 2nd Paper (English Version) exam. After the exam, many of you want to verify your answers. To help you out, we have collected the question paper from all boards and prepared this solution with the help of experienced teachers. Check your answers from below, and if you need, you can also download the complete PDF solution from the bottom of this page.
1. Which metal compound is present in the raw materials of cement industry?
(a) Ca
(b) K
(c) Al
(d) Na
✓ Answer: (a) Ca
2. What is the density of H2SO4 in lead storage battery?
(a) 9.8 g/cm3
(b) 4.9 g/cm3
(c) 1.29 g/cm3
(d) 1.0 g/cm3
✓ Answer: (c) 1.29 g/cm3
3. Which salt causes temporary hardness in water?
(a) NaHCO3
(b) Ca(HCO3)2
(c) FeSO4
(d) MgSO4
✓ Answer: (b) Ca(HCO3)2
Answer question number 4 and 5 according to the following stem :
Q + O3 → (CCl4) → X → (Zn, H2O) → Y (2-carbon) + Z (1-carbon)
[Q, X, Y, Z used as symbolic meaning and Y, Z are carbonyl compounds]
4. What is structural formula of Q?
(a) CH3 - C ≡ CH
(b) CH3 - CH = CH2
(c) Cyclopropane ring (CH2 - CH2 - CH2)
(d) CH3 - CH2 - CH3
✓ Answer: (b) CH3 - CH = CH2
5. The compounds in the stem—
i. Y gives iodoform reaction
ii. Z gives Cannizzaro reaction
iii. Y and Z gives nucleophilic substitution reaction
Which one is correct?
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
✓ Answer: (d) i, ii and iii
6. Which of the following gas has the highest RMS velocity at STP?
(a) CO2
(b) SO2
(c) NH3
(d) N2
✓ Answer: (c) NH3
7. 1.06%(w/v) Na2CO3 solution is—
i. Decimolar solution
ii. 10.6 mg/ml solution
iii. 1.06 × 104 ppm solution
Which one is correct?
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
✓ Answer: (d) i, ii and iii
8. Which is the suitable indicator for the titration of NH4OH and HCl.
(a) Litmus paper
(b) Phenolph thalein
(c) Methyl orange
(d) Thymol blue
✓ Answer: (c) Methyl orange
9. Which one is smaller in size?
(a) Polymeric molecule
(b) Nanoparticle
(c) Molecule
(d) Atom
✓ Answer: (d) Atom
10. Which compound is optically active?
(a) (CH3)2C = CHCl
(b) CH2(NH2) - COOH
(c) CH3 - CH(NH2) - COOH
(d) Cl - CH2 - NO2
✓ Answer: (c) CH3 - CH(NH2) - COOH
11. In which of the following reaction, carbon chain is reduced?
(a) Wurtz reaction
(b) Sandmeyer reaction
(c) Friedel crafts reaction
(d) Hoffmann degradation reaction
✓ Answer: (d) Hoffmann degradation reaction
12. How much metal will be deposited on the cathode when a current of 5A is passed through CuSO4 solution for 5 sec?
(a) 0.016g
(b) 0.017g
(c) 0.0082g
(d) 0.0085g
✓ Answer: (c) 0.0082g
13. If rate of diffusion of a gas is 4.691 times higher than CO2, what will be its molecular mass?
(a) 2
(b) 4
(c) 28
(d) 32
✓ Answer: (a) 2
14. What is the number of H+ ion in 250 mL 0.5M H2SO4 solution?
(a) 6.023 × 1023
(b) 3.01 × 1023
(c) 7.5 × 1022
(d) 1.5 × 1023
✓ Answer: (c) 7.5 × 1022
15. Which one is electrolytic conductor?
(a) Solid sodium chloride
(b) Sulphuric acid
(c) Ethyl alcohol
(d) Carbon tetra chloride
✓ Answer: (b) Sulphuric acid
Answer question number 16 and 17 according to the following stem :
Pot-A: 14g Ne, t=35°C
Pot-B: 12g O2, t=35°C
Pot-C: 16g CO2, t=35°C
16. What is the correct order of kinetic energy of the gases in the stem?
(a) Ne > O2 > CO2
(b) Ne > CO2 > O2
(c) CO2 > O2 > Ne
(d) O2 > CO2 > Ne
✓ Answer: (a) Ne > O2 > CO2
17. How many molecules of CO2 are in the stem?
(a) 6.023 × 1023
(b) 5.33 × 1023
(c) 4.38 × 1023
(d) 2.19 × 1023
✓ Answer: (d) 2.19 × 1023
18. Which can act both as oxidant and reductant?
(a) Cu2+
(b) Fe2+
(c) Mg2+
(d) Zn2+
✓ Answer: (b) Fe2+
19. What is the electromotive force of dry cell?
(a) + 1.10V
(b) + 1.23V
(c) + 1.51V
(d) + 2.37V
✓ Answer: (c) + 1.51V
20. Which method is used to keep leather free of bacteria?
(a) Annealing
(b) Curing
(c) Tanning
(d) Glazing
✓ Answer: (b) Curing
Read the following stem and answer question number 21 and 22 :
RMgX + A → (H2O, H+) → B [Reacts rapidly with Lucas reagent]
[A, B used as symbolic meaning and A is a compound of 5 carbon]
21. What is the IUPAC name of compound A?
(a) Pentanone-2
(b) Pentanal
(c) 2-methyl-butanal
(d) 3-methyl butanal
✓ Answer: (a) Pentanone-2
22. B Compound—
i. soluble in water
ii. acidic
iii. produce carboxylic acid in oxidation
Which one is correct?
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
✓ Answer: (a) i and ii
23. Which is used as cooking liquor for the production of pulp?
(a) Ca(OCl)
(b) CaO + NaOH
(c) H2SO4
(d) Na2S + NaOH
✓ Answer: (d) Na2S + NaOH
24. Use for the production of explosives—
i. Glycerine
ii. Toluine
iii. Phenol
Which one is correct?
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
✓ Answer: (d) i, ii and iii
25. Which of the following indicates to reduction electrode?
(a) Cu/Cu2+
(b) Zn2+/Zn
(c) Pt/Fe2+, Fe3+
(d) Pt, H2/H+
✓ Answer: (b) Zn2+/Zn
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