100 NEET Chemistry MCQs (Physical + Organic + Inorganic) with Solutions – 2025
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Get ready for NEET 2025 with our comprehensive set of 100 NEET Chemistry MCQs covering Physical, Organic, and Inorganic Chemistry. Each question is designed based on the latest NEET syllabus and exam pattern, with detailed solutions and explanations provided to enhance your understanding. Whether you're revising concepts or practicing for accuracy, this MCQ set is perfect for last-minute NEET preparation.
Key Features:
-
Covers all major topics in NEET Chemistry
-
Mix of conceptual and application-based questions
-
Solutions aligned with NCERT and NEET 2025 trends
-
Ideal for self-assessment and quick revision
Boost your score in NEET Chemistry with our expertly crafted MCQs and explanations.
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Post Description:
Get ready for NEET 2025 with our comprehensive set of 100 NEET Chemistry MCQs covering Physical, Organic, and Inorganic Chemistry. Each question is designed based on the latest NEET syllabus and exam pattern, with detailed solutions and explanations provided to enhance your understanding. Whether you're revising concepts or practicing for accuracy, this MCQ set is perfect for last-minute NEET preparation.
Key Features:
-
Covers all major topics in NEET Chemistry
-
Mix of conceptual and application-based questions
-
Solutions aligned with NCERT and NEET 2025 trends
-
Ideal for self-assessment and quick revision
Boost your score in NEET Chemistry with our expertly crafted MCQs and explanations.
SEO Keywords:
NEET Chemistry MCQs 2025, NEET 2025 Chemistry Questions, Physical Chemistry NEET questions, Organic Chemistry MCQs NEET, Inorganic Chemistry MCQs NEET, NEET Chemistry practice questions, NEET solved MCQs PDF, NEET Chemistry mock test, NEET 2025 preparation, NCERT-based NEET Chemistry questions
100 NEET Chemistry MCQs (Physical + Organic + Inorganic) with Solutions – 2025
Keywords: NEET Chemistry MCQs 2025, NEET Chemistry Questions, NEET Physical Chemistry, NEET Organic Chemistry, NEET Inorganic Chemistry, NEET Chemistry Practice Questions, NEET Chemistry Preparation, Chemistry MCQs with Solutions
Physical Chemistry (33 MCQs)
-
Which of the following gases will deviate most from ideal behavior?
a) H₂
b) He
c) CO₂
d) N₂
Answer: c) CO₂
Explanation: CO₂ is a polarizable gas with stronger intermolecular forces causing deviation from ideal gas behavior. -
The rate of a reaction is doubled when the temperature is raised from 300 K to 310 K. What is the approximate activation energy (Ea) for the reaction?
a) 40 kJ/mol
b) 50 kJ/mol
c) 60 kJ/mol
d) 70 kJ/mol
Answer: a) 40 kJ/mol
Explanation: Using Arrhenius equation and rule of thumb for rate doubling near 10 K. -
The pH of a 0.01 M HCl solution is:
a) 2
b) 1
c) 3
d) 0
Answer: a) 2
Explanation: pH = -log[H⁺] = -log(0.01) = 2. -
The colligative property that depends on the number of solute particles but not their nature is:
a) Boiling point elevation
b) Viscosity
c) Surface tension
d) Density
Answer: a) Boiling point elevation -
The first law of thermodynamics is a statement of:
a) Conservation of energy
b) Entropy increase
c) Conservation of mass
d) Gibbs free energy change
Answer: a) Conservation of energy -
At constant temperature, the volume of a gas is inversely proportional to pressure. This is stated by:
a) Boyle’s Law
b) Charles’s Law
c) Avogadro’s Law
d) Dalton’s Law
Answer: a) Boyle’s Law -
The half-life of a first order reaction is 20 minutes. What fraction of reactant remains after 40 minutes?
a) 1/4
b) 1/2
c) 3/4
d) 1/8
Answer: a) 1/4
Explanation: After two half-lives, (1/2)² = 1/4 remains. -
Which of the following solutions has the highest boiling point?
a) 1 M NaCl
b) 1 M CaCl₂
c) 1 M glucose
d) 1 M MgCl₂
Answer: b) 1 M CaCl₂
Explanation: CaCl₂ dissociates into 3 ions, highest van’t Hoff factor (i). -
The standard electrode potential of hydrogen electrode is:
a) 0 V
b) +1 V
c) -1 V
d) +0.5 V
Answer: a) 0 V -
In a galvanic cell, the cathode is the site of:
a) Oxidation
b) Reduction
c) Both oxidation and reduction
d) No reaction
Answer: b) Reduction -
Which of the following has the highest lattice energy?
a) NaCl
b) MgO
c) KBr
d) CaF₂
Answer: b) MgO
Explanation: Mg²⁺ and O²⁻ have highest charge and small ionic radius. -
The rate law for a reaction is Rate = k[A]²[B]. The overall order of the reaction is:
a) 1
b) 2
c) 3
d) 4
Answer: c) 3 -
Which of the following is a primary standard for acid-base titration?
a) NaOH
b) KHP (Potassium hydrogen phthalate)
c) HCl
d) NaCl
Answer: b) KHP -
Entropy is a measure of:
a) Disorder
b) Energy content
c) Enthalpy
d) Heat absorbed
Answer: a) Disorder -
Which law states that partial pressures of gases add up to total pressure?
a) Dalton’s Law
b) Henry’s Law
c) Raoult’s Law
d) Boyle’s Law
Answer: a) Dalton’s Law -
In the reaction 2A → Products, the rate doubles when [A] is doubled. The reaction is:
a) Zero order
b) First order
c) Second order
d) Third order
Answer: b) First order -
Which type of isomerism is shown by but-1-ene and but-2-ene?
a) Structural isomerism
b) Geometrical isomerism
c) Optical isomerism
d) Functional isomerism
Answer: a) Structural isomerism -
The temperature at which a solid turns directly into vapor is called:
a) Melting point
b) Boiling point
c) Sublimation point
d) Critical temperature
Answer: c) Sublimation point -
At constant pressure, the enthalpy change (ΔH) is equal to:
a) Work done
b) Heat absorbed or released
c) Change in entropy
d) Change in Gibbs free energy
Answer: b) Heat absorbed or released -
A catalyst works by:
a) Increasing activation energy
b) Decreasing activation energy
c) Increasing enthalpy change
d) Changing equilibrium constant
Answer: b) Decreasing activation energy -
The reaction between HCl and NaOH is:
a) Exothermic
b) Endothermic
c) Isochoric
d) Adiabatic
Answer: a) Exothermic -
The van’t Hoff factor for Na₂SO₄ is:
a) 1
b) 2
c) 3
d) 4
Answer: c) 3 -
Which one of the following is NOT a colligative property?
a) Vapor pressure lowering
b) Osmotic pressure
c) Surface tension
d) Freezing point depression
Answer: c) Surface tension -
In which state is the internal energy of an ideal gas independent of volume?
a) Constant temperature
b) Constant pressure
c) Constant volume
d) All of the above
Answer: a) Constant temperature -
Which of the following shows first-order kinetics?
a) Radioactive decay
b) Precipitation reaction
c) Acid-base neutralization
d) Combustion
Answer: a) Radioactive decay -
For a reaction at equilibrium, if ΔG is zero, then:
a) The reaction is spontaneous
b) The reaction is at equilibrium
c) The reaction is non-spontaneous
d) The reaction proceeds forward
Answer: b) The reaction is at equilibrium -
The equation PV = nRT is valid for:
a) Ideal gases
b) Real gases at all conditions
c) Solids
d) Liquids
Answer: a) Ideal gases -
The oxidation state of chromium in K₂Cr₂O₇ is:
a) +6
b) +3
c) +2
d) +7
Answer: a) +6 -
Which one of the following will have the highest boiling point?
a) CH₄
b) C₂H₆
c) C₃H₈
d) C₄H₁₀
Answer: d) C₄H₁₀
Explanation: Boiling point increases with molecular weight. -
In a reaction A → B, the plot of ln[A] versus time is a straight line. The reaction is:
a) Zero order
b) First order
c) Second order
d) Third order
Answer: b) First order -
Which of the following is not a thermodynamic state function?
a) Enthalpy
b) Entropy
c) Work
d) Internal energy
Answer: c) Work -
The pressure exerted by a vapor in equilibrium with its liquid is called:
a) Osmotic pressure
b) Vapor pressure
c) Atmospheric pressure
d) Hydrostatic pressure
Answer: b) Vapor pressure -
The molarity of a solution prepared by dissolving 18 g of NaOH (Molar mass = 40 g/mol) in 1 L of solution is:
a) 0.25 M
b) 0.45 M
c) 0.5 M
d) 0.55 M
Answer: c) 0.45 M
Calculation: Moles = 18/40 = 0.45 mol/L
Organic Chemistry (33 MCQs)
-
Which is the most acidic among the following?
a) Phenol
b) Ethanol
c) Aniline
d) Benzene
Answer: a) Phenol -
Markovnikov’s rule helps to predict:
a) Major product of electrophilic addition to alkenes
b) Rate of reaction
c) Stereochemistry of reaction
d) Substitution pattern in aromatic compounds
Answer: a) Major product of electrophilic addition to alkenes -
The hybridization of carbon in ethyne (C₂H₂) is:
a) sp
b) sp²
c) sp³
d) sp³d
Answer: a) sp -
Which of the following is an example of nucleophilic substitution reaction?
a) SN1
b) E1
c) E2
d) Electrophilic addition
Answer: a) SN1 -
Which reagent is used to convert an alcohol into an alkyl halide?
a) SOCl₂
b) NaBH₄
c) H₂SO₄
d) KMnO₄
Answer: a) SOCl₂ -
The compound CH₃-CH₂-CHO is:
a) Alcohol
b) Aldehyde
c) Ketone
d) Ether
Answer: b) Aldehyde -
The product formed when benzene reacts with Cl₂ in presence of FeCl₃ is:
a) Chlorobenzene
b) Benzyl chloride
c) Phenol
d) Chlorocyclohexane
Answer: a) Chlorobenzene -
Which of the following compounds shows optical isomerism?
a) 2-Butanol
b) 1-Butanol
c) But-1-ene
d) Butane
Answer: a) 2-Butanol -
The functional group in ketones is:
a) -CHO
b) -COOH
c) -CO-
d) -OH
Answer: c) -CO- -
Which of the following is an aromatic compound?
a) Cyclohexane
b) Benzene
c) Cyclobutane
d) Butane
Answer: b) Benzene -
The reaction of alkenes with HBr in presence of peroxide follows:
a) Markovnikov’s rule
b) Anti-Markovnikov’s rule
c) Both Markovnikov and Anti-Markovnikov
d) No addition
Answer: b) Anti-Markovnikov’s rule -
The major product of Diels-Alder reaction is:
a) Aromatic compound
b) Cyclohexene derivative
c) Alcohol
d) Alkane
Answer: b) Cyclohexene derivative -
The IUPAC name of CH₃CH=CH₂ is:
a) Propene
b) Propane
c) Propan-2-ol
d) Propanone
Answer: a) Propene -
Which of the following is a primary amine?
a) CH₃NH₂
b) (CH₃)₂NH
c) (CH₃)₃N
d) NH₃
Answer: a) CH₃NH₂ -
Which of the following compounds can exhibit tautomerism?
a) Alcohols
b) Aldehydes
c) Ketones
d) Both b and c
Answer: d) Both b and c -
The major product of aldol condensation of acetaldehyde is:
a) Crotonaldehyde
b) Acetone
c) Ethanol
d) Acetic acid
Answer: a) Crotonaldehyde -
The name of CH₃CH₂OH is:
a) Ethanol
b) Ethanal
c) Ethanoic acid
d) Methanol
Answer: a) Ethanol -
Which of the following reagents is used to oxidize primary alcohols to aldehydes?
a) PCC (Pyridinium chlorochromate)
b) KMnO₄
c) NaBH₄
d) H₂SO₄
Answer: a) PCC -
The reaction between an acid and alcohol in presence of acid catalyst produces:
a) Ether
b) Ester
c) Ketone
d) Aldehyde
Answer: b) Ester -
Which of the following is a heterocyclic compound?
a) Benzene
b) Pyridine
c) Ethane
d) Cyclohexane
Answer: b) Pyridine -
The major product when benzene reacts with CH₃Cl in presence of AlCl₃ is:
a) Toluene
b) Benzyl chloride
c) Chlorobenzene
d) Benzyl alcohol
Answer: a) Toluene -
Which compound has a plane of symmetry and is optically inactive?
a) 2-Butanol
b) Mesotartaric acid
c) Lactic acid
d) Glyceraldehyde
Answer: b) Mesotartaric acid -
The reagent used in Grignard reaction is:
a) RMgX
b) RLi
c) NaBH₄
d) H₂SO₄
Answer: a) RMgX
Inorganic Chemistry (34 MCQs)
-
Which of the following elements has the highest electronegativity?
a) F
b) O
c) N
d) Cl
Answer: a) F -
The electronic configuration of Fe³⁺ ion is:
a) [Ar] 3d⁶
b) [Ar] 3d⁵
c) [Ar] 3d⁴
d) [Ar] 3d⁷
Answer: b) [Ar] 3d⁵ -
Which of the following is a noble gas?
a) Neon
b) Nitrogen
c) Oxygen
d) Hydrogen
Answer: a) Neon -
The oxidation state of manganese in KMnO₄ is:
a) +7
b) +6
c) +4
d) +2
Answer: a) +7 -
Which acid is known as 'Oil of Vitriol'?
a) H₂SO₄
b) HCl
c) HNO₃
d) H₃PO₄
Answer: a) H₂SO₄ -
The formula of bleaching powder is:
a) CaOCl₂
b) CaCl₂
c) CaClOH
d) Ca(ClO)₂
Answer: a) CaOCl₂ -
Which of the following oxides is acidic?
a) CO₂
b) Na₂O
c) CaO
d) MgO
Answer: a) CO₂ -
Which transition metal has the highest melting point?
a) Fe
b) Cu
c) W (Tungsten)
d) Au
Answer: c) W -
Which of the following is a halogen?
a) F₂
b) O₂
c) N₂
d) H₂
Answer: a) F₂ -
The alloy used in making coins is:
a) Bronze
b) Brass
c) Steel
d) Solder
Answer: b) Brass -
Which element is liquid at room temperature?
a) Mercury
b) Copper
c) Iron
d) Lead
Answer: a) Mercury -
The formula of ferrous sulphate is:
a) FeSO₄
b) Fe₂(SO₄)₃
c) FeSO₃
d) FeS
Answer: a) FeSO₄ -
The main constituent of air is:
a) Nitrogen
b) Oxygen
c) Carbon dioxide
d) Argon
Answer: a) Nitrogen -
Which of the following is a lanthanide?
a) Cerium
b) Zinc
c) Copper
d) Silver
Answer: a) Cerium -
Which element is called ‘King of Chemicals’?
a) Sulfuric acid
b) Hydrochloric acid
c) Nitric acid
d) Phosphoric acid
Answer: a) Sulfuric acid -
The process of converting iron ore into iron is called:
a) Smelting
b) Calcination
c) Roasting
d) Electrolysis
Answer: a) Smelting -
The oxidation state of chlorine in NaClO₃ is:
a) +5
b) +3
c) +1
d) -1
Answer: a) +5 -
Which of the following has the highest ionization energy?
a) Li
b) Be
c) B
d) C
Answer: b) Be -
Which gas is known as laughing gas?
a) Nitrous oxide (N₂O)
b) Nitric oxide (NO)
c) Carbon dioxide (CO₂)
d) Oxygen (O₂)
Answer: a) Nitrous oxide (N₂O) -
The coordination number of central metal ion in [Fe(CN)₆]⁴⁻ is:
a) 6
b) 4
c) 2
d) 8
Answer: a) 6 -
Which acid is used in car batteries?
a) Sulfuric acid
b) Nitric acid
c) Hydrochloric acid
d) Phosphoric acid
Answer: a) Sulfuric acid -
Which element is most abundant in the earth’s crust?
a) Oxygen
b) Silicon
c) Aluminum
d) Iron
Answer: a) Oxygen -
Which among the following is amphoteric oxide?
a) ZnO
b) CO₂
c) Na₂O
d) SO₃
Answer: a) ZnO -
Which of the following metals forms an amalgam?
a) Zinc
b) Copper
c) Iron
d) Gold
Answer: a) Zinc -
The group 17 elements are called:
a) Halogens
b) Noble gases
c) Alkali metals
d) Alkaline earth metals
Answer: a) Halogens -
Which element has the smallest atomic radius?
a) F
b) O
c) N
d) Ne
Answer: d) Ne -
The chemical formula of plaster of Paris is:
a) CaSO₄·½H₂O
b) CaSO₄·2H₂O
c) CaCO₃
d) CaO
Answer: a) CaSO₄·½H₂O -
The molecular geometry of NH₃ is:
a) Trigonal pyramidal
b) Tetrahedral
c) Linear
d) Bent
Answer: a) Trigonal pyramidal -
Which of the following is paramagnetic?
a) O₂
b) N₂
c) CO₂
d) H₂O
Answer: a) O₂ -
Which element is liquid at room temperature?
a) Bromine
b) Iodine
c) Chlorine
d) Fluorine
Answer: a) Bromine -
Which among the following is a representative element?
a) Sodium
b) Iron
c) Copper
d) Zinc
Answer: a) Sodium -
Which element has the highest first ionization energy in period 3?
a) Argon
b) Sodium
c) Chlorine
d) Sulfur
Answer: a) Argon -
The number of valence electrons in phosphorus (P) is:
a) 5
b) 3
c) 4
d) 2
Answer: a) 5 -
The common oxidation state of alkali metals is:
a) +1
b) +2
c) -1
d) 0
Answer: a) +1 -
The molecular formula of ozone is:
a) O₃
b) O₂
c) O
d) O₄
Answer: a) O₃ -
Which of the following compounds is ionic?
a) NaCl
b) CH₄
c) CO₂
d) H₂O
Answer: a) NaCl -
The main ore of aluminum is:
a) Bauxite
b) Hematite
c) Magnetite
d) Galena
Answer: a) Bauxite -
Which gas is responsible for acid rain?
a) SO₂
b) CO₂
c) NO₂
d) O₃
Answer: a) SO₂ -
The element with atomic number 17 is:
a) Chlorine
b) Sulfur
c) Phosphorus
d) Argon
Answer: a) Chlorine -
Which of the following is a strong acid?
a) HCl
b) CH₃COOH
c) HF
d) H₂CO₃
Answer: a) HCl -
The valence shell electron configuration of chlorine (Cl) is:
a) 3s² 3p⁵
b) 2s² 2p⁵
c) 3s² 3p⁶
d) 4s² 4p⁵
Answer: a) 3s² 3p⁵ -
Which of the following is a reducing agent?
a) Zn
b) H₂O₂
c) Cl₂
d) O₃
Answer: a) Zn -
The number of neutrons in ₁₇³⁵Cl is:
a) 18
b) 17
c) 35
d) 52
Answer: a) 18 -
Which of the following elements has variable oxidation states?
a) Iron
b) Sodium
c) Neon
d) Argon
Answer: a) Iron
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