Top 50 Most Important Objective Questions for CUET UG 2026
Prepare smartly for CUET UG 2026 Chemistry MCQs with Answers PDF | Top 50 Important Questions based on previous-year board patterns, important concepts, electrochemistry, coordination compounds, organic chemistry, polymers, biomolecules, p-block, d-block and surface chemistry.
These questions are designed for:
- CUET UG 2026
- Class 12 Chemistry Revision
- NCERT-Based Preparation
- Quick Practice Before Exam
CUET UG 2026 Chemistry MCQs
1. In an FCC crystal structure, the number of atoms per unit cell is:
A) 1
B) 2
C) 4
D) 6
✅ Answer: C) 4
2. Which defect does not change the density of a crystal?
A) Frenkel defect
B) Schottky defect
C) Vacancy defect
D) Metal deficiency defect
✅ Answer: A) Frenkel defect
3. The relation between molar conductivity (Λm) and conductivity (κ) is:
A) Λm = κ × 1000/M
B) Λm = κ/M
C) Λm = M/κ
D) Λm = κ × M × 1000
✅ Answer: A) Λm = κ × 1000/M
4. Which process has higher enthalpy of adsorption?
A) Physisorption
B) Chemisorption
C) Desorption
D) Absorption
✅ Answer: B) Chemisorption
5. Cryolite is used in the extraction of aluminium because it:
A) Increases melting point
B) Acts as reducing agent
C) Lowers melting point of alumina
D) Removes impurities
✅ Answer: C) Lowers melting point of alumina
6. Which gas is used in Mond’s process for purification of nickel?
A) CO₂
B) SO₂
C) CO
D) H₂
✅ Answer: C) CO
7. Which molecule has square planar geometry?
A) XeF₄
B) BF₃
C) SF₄
D) NH₃
✅ Answer: A) XeF₄
8. The Tyndall effect is shown by:
A) True solution
B) Suspension
C) Colloids
D) Electrolytes
✅ Answer: C) Colloids
9. Which vitamin deficiency causes scurvy?
A) Vitamin A
B) Vitamin B₁
C) Vitamin C
D) Vitamin D
✅ Answer: C) Vitamin C
10. Nylon-6,6 is an example of:
A) Addition polymer
B) Condensation polymer
C) Elastomer
D) Copolymer
✅ Answer: B) Condensation polymer
11. Teflon is formed by polymerization of:
A) Ethene
B) Tetrafluoroethene
C) Styrene
D) Vinyl chloride
✅ Answer: B) Tetrafluoroethene
12. Which colloid has liquid dispersed in gas?
A) Emulsion
B) Aerosol
C) Foam
D) Sol
✅ Answer: B) Aerosol
13. The oxidation state of Fe in [Fe(en)₂Cl₂]Cl is:
A) +1
B) +2
C) +3
D) +4
✅ Answer: C) +3
14. Ethoxybenzene is prepared by:
A) Wurtz reaction
B) Friedel-Crafts reaction
C) Williamson synthesis
D) Cannizzaro reaction
✅ Answer: C) Williamson synthesis
15. Which reagent converts alcohol into alkyl chloride?
A) NaOH
B) SOCl₂
C) KMnO₄
D) H₂SO₄
✅ Answer: B) SOCl₂
16. Cannizzaro reaction is given by:
A) Aldehydes without α-H
B) Ketones
C) Alcohols
D) Carboxylic acids
✅ Answer: A) Aldehydes without α-H
17. Which compound gives iodoform test?
A) Methanol
B) Ethanol
C) Benzene
D) Acetone-free ether
✅ Answer: B) Ethanol
18. Which drug acts as antacid?
A) Paracetamol
B) Aspirin
C) Ranitidine
D) Morphine
✅ Answer: C) Ranitidine
19. Paracetamol is mainly used as:
A) Antacid
B) Antibiotic
C) Analgesic
D) Antiseptic
✅ Answer: C) Analgesic
20. Tincture of iodine is used as:
A) Fertilizer
B) Antiseptic
C) Polymer
D) Catalyst
✅ Answer: B) Antiseptic
21. NH₃ is more basic than PH₃ because:
A) N is smaller and lone pair is more available
B) P is more electronegative
C) PH₃ forms H-bonding
D) NH₃ is acidic
✅ Answer: A) N is smaller and lone pair is more available
22. Which compound is least reactive towards hydrolysis?
A) SF₄
B) SF₆
C) PCl₅
D) SOCl₂
✅ Answer: B) SF₆
23. The hybridization of XeF₄ is:
A) sp³
B) sp³d
C) sp³d²
D) dsp²
✅ Answer: C) sp³d²
24. Which of the following is a strong oxidizing agent?
A) Mn³⁺
B) Cr²⁺
C) Fe²⁺
D) Cu⁺
✅ Answer: A) Mn³⁺
25. The rate constant of a first-order reaction has unit:
A) mol L⁻¹ s⁻¹
B) s⁻¹
C) L mol⁻¹ s⁻¹
D) mol² L⁻² s⁻¹
✅ Answer: B) s⁻¹
26. Half-life of a first-order reaction:
A) Depends on concentration
B) Independent of concentration
C) Zero
D) Infinite
✅ Answer: B) Independent of concentration
27. Which factor increases rate of reaction?
A) Decrease in temperature
B) Catalyst
C) Dilution
D) Decrease in surface area
✅ Answer: B) Catalyst
28. The process of removal of CO from nickel is called:
A) Hall process
B) Bessemer process
C) Mond process
D) Haber process
✅ Answer: C) Mond process
29. Which colloid is solid dispersed in liquid?
A) Sol
B) Gel
C) Foam
D) Aerosol
✅ Answer: A) Sol
30. Which gas is evolved when phosphorus reacts with NaOH?
A) NH₃
B) PH₃
C) SO₂
D) H₂
✅ Answer: B) PH₃
31. BF₃ has geometry:
A) Tetrahedral
B) Trigonal planar
C) Linear
D) Bent
✅ Answer: B) Trigonal planar
32. Which polymer is used in non-stick cookware?
A) PVC
B) Nylon
C) Teflon
D) Bakelite
✅ Answer: C) Teflon
33. Which carbohydrate is stored in plants?
A) Glycogen
B) Cellulose
C) Starch
D) Glucose
✅ Answer: C) Starch
34. The unit of conductivity is:
A) S cm⁻¹
B) mol L⁻¹
C) ohm cm
D) atm
✅ Answer: A) S cm⁻¹
35. Which is a biodegradable polymer?
A) PVC
B) Nylon
C) PHBV
D) Polythene
✅ Answer: C) PHBV
36. The order of SN1 reaction depends on:
A) Nucleophile concentration
B) Substrate concentration
C) Catalyst concentration
D) Solvent only
✅ Answer: B) Substrate concentration
37. Which alkyl halide reacts fastest in SN1 mechanism?
A) Methyl halide
B) Primary
C) Secondary
D) Tertiary
✅ Answer: D) Tertiary
38. Which process converts alkyl halide to nitrile?
A) Hydrolysis
B) Reduction
C) Cyanation
D) Halogenation
✅ Answer: C) Cyanation
39. The colloidal particles carry:
A) No charge
B) Positive charge only
C) Negative charge only
D) Electric charge
✅ Answer: D) Electric charge
40. Gold number is related to:
A) Catalysis
B) Protection of colloids
C) Adsorption
D) Emulsion
✅ Answer: B) Protection of colloids
41. Which ore is concentrated by froth flotation process?
A) Oxide ores
B) Sulphide ores
C) Carbonate ores
D) Silicate ores
✅ Answer: B) Sulphide ores
42. Which law explains osmotic pressure?
A) Boyle’s law
B) Raoult’s law
C) van’t Hoff law
D) Charles law
✅ Answer: C) van’t Hoff law
43. Which solution shows positive deviation from Raoult’s law?
A) Acetone + Chloroform
B) Ethanol + Water
C) Benzene + Toluene
D) HCl + Water
✅ Answer: B) Ethanol + Water
44. Which compound undergoes Cannizzaro reaction?
A) CH₃CHO
B) HCHO
C) CH₃COCH₃
D) C₂H₅OH
✅ Answer: B) HCHO
45. Which coordination compound shows optical isomerism?
A) [Co(en)₃]³⁺
B) [NiCl₄]²⁻
C) [PtCl₄]²⁻
D) [Cu(NH₃)₄]²⁺
✅ Answer: A) [Co(en)₃]³⁺
46. Which species is paramagnetic?
A) Zn²⁺
B) Cu²⁺
C) Sc³⁺
D) Ti⁴⁺
✅ Answer: B) Cu²⁺
47. The decomposition of NH₃ on platinum surface is:
A) First order
B) Second order
C) Zero order
D) Third order
✅ Answer: C) Zero order
48. Which reaction forms primary amine from amide?
A) Wurtz reaction
B) Hoffmann bromamide reaction
C) Sandmeyer reaction
D) Fittig reaction
✅ Answer: B) Hoffmann bromamide reaction
49. Which gas is liberated at cathode during electrolysis of brine?
A) O₂
B) Cl₂
C) H₂
D) CO₂
✅ Answer: C) H₂
50. Which transition metal ion has d⁵ configuration?
A) Fe³⁺
B) Cu²⁺
C) Zn²⁺
D) Sc³⁺
✅ Answer: A) Fe³⁺
FAQs – CUET UG 2026 Chemistry
Q1. Are these MCQs useful for CUET UG 2026?
Yes, these questions are highly important and NCERT-oriented for CUET UG Chemistry preparation.
Q2. Which chapters are covered?
Topics include:
- Electrochemistry
- Coordination Compounds
- Surface Chemistry
- Polymers
- Biomolecules
- p-Block
- d-Block
- Haloalkanes
- Chemical Kinetics
Q3. Are these CUET UG 2026 Chemistry MCQs with Answers PDF | Top 50 Important Questions based on previous-year patterns?
Yes, these are inspired by board-level and CUET pattern objective questions.
Q4. How many MCQs should I practice daily for CUET?
Practice at least 50 MCQs daily with revision of NCERT concepts.
