Daily free Chemistry questions for NEET, JEE (Foundation), MHT-CET and other competitive exams.
Last Updated: 27 Mar 2026
1. Which of the following has highest ionization energy?
2. Which of the following is most stable conjugate base?
3. Which of the following has highest bond angle?
4. Which compound undergoes fastest SN1 reaction?
5. Which of the following has highest electron gain enthalpy?
Final NEET rules: Across period → ionization energy increases (C highest here). Resonance stabilizes conjugate base (phenoxide ion). BF₃ is trigonal planar → 120° highest angle. SN1 fastest in tertiary carbocation. Chlorine has highest electron affinity. These crack last-level chem mcq.
1. Which of the following has highest hydration enthalpy?
2. Which of the following is most stable radical?
3. Which of the following has highest bond dissociation energy?
4. Which of the following is most acidic?
5. Which of the following has maximum entropy?
Final NEET shortcuts: Higher charge + smaller size → highest hydration enthalpy. Radical stability: 3° > 2° > 1° > methyl. Cl₂ has strongest bond among halogens. Carboxylic acid strongest among given. Entropy: Gas > Liquid > Solid. These solve toughest chem mcq in exam.
1. Which of the following has maximum bond order?
2. Which of the following is most basic?
3. Which of the following is most stable carbocation?
4. Which of the following has highest boiling point?
5. Which of the following reaction is fastest?
Use these final exam tricks: Remove electron → bond order increases. Strongest base = negative charge (NH₂⁻). Benzyl carbocation is highly stable due to resonance. Straight chain → higher boiling point. SN2 fastest in least steric hindrance (methyl). These help crack final chem mcq in NEET.
1. Which of the following has highest lattice energy?
2. Which of the following is most acidic?
3. Which species has maximum number of lone pairs?
4. Which compound shows optical isomerism?
5. Which of the following is a strong oxidizing agent?
Use these NEET tricks: Higher charge + smaller size → higher lattice energy (MgO). Carboxylic acids are strongest among given. Ions have more lone pairs (Cl⁻). Chiral carbon → optical isomerism. Ozone is a strong oxidizing agent. These help solve tough chem mcq fast.
1. Which of the following has maximum boiling point?
2. The hybridisation of carbon in CO₂ is:
3. Which of the following is strongest reducing agent?
4. Which gas is evolved in the reaction of Zn with dilute HCl?
5. Which compound shows resonance?
Focus on basics: Hydrogen bonding increases boiling point (H₂O highest). Linear molecules → sp hybridisation. Metals with low IE → strong reducing agents. Zn + HCl → H₂ gas. Resonance stabilizes molecules like benzene. These cover many chem mcq in NEET.
1. Which reaction converts amide to amine with one carbon less?
2. Cannizzaro reaction occurs in:
3. Reimer-Tiemann reaction introduces which group in phenol?
4. Aldol condensation requires:
5. Which reaction gives carboxylic acid from alkyl benzene?
Use this NEET memory trick: Hoffmann → carbon chain decreases. Cannizzaro → aldehyde without α-H. Aldol → needs α-H. Reimer-Tiemann → gives –CHO group. KMnO₄ → strong oxidizing agent. These solve most chem mcq from named reactions.
1. Which carbocation will undergo rearrangement?
2. Which reaction follows Markovnikov’s rule?
3. Which intermediate is most stable?
4. In elimination reactions, major product is formed according to:
5. Which reagent gives anti-Markovnikov addition?
Use these NEET tricks: Carbocation rearranges to more stable form. Markovnikov → more substituted carbon gets H. Saytzeff → more substituted alkene forms. Peroxide effect gives anti-Markovnikov addition. Carbanion stability is opposite of carbocation. These concepts crack advanced chem mcq easily.
1. Which carbocation is most stable?
2. SN2 reactions are favored by:
3. Which intermediate is formed in SN1 reaction?
4. Which effect stabilizes carbocation?
5. Which reaction proceeds via free radical mechanism?
Use these NEET rules: Carbocation stability: 3° > 2° > 1° > CH₃. SN1 → carbocation formation. SN2 → single step (backside attack). +I effect stabilizes positive charge. Free radical reactions occur in halogenation. These solve most chem mcq from organic mechanism.
1. Which of the following has the smallest atomic radius?
2. Which element has highest first ionization energy?
3. Which of the following is most metallic?
4. Electron affinity is lowest for:
5. Which of the following has highest electronegativity?
Use these NEET tricks: Smallest size → top right (Cl here). Nitrogen has highest IE due to half-filled stability. Metallic character increases down group. Nitrogen has very low electron affinity due to stability. Fluorine always highest electronegativity. These tricks crack tricky chem mcq easily.
1. Which of the following has the highest atomic radius?
2. Ionization energy increases across a period due to:
3. Which element has highest electronegativity?
4. Metallic character:
5. Which has highest electron affinity?
Use this NEET shortcut: Across period → size ↓, ionization energy ↑. Down group → size ↑. Fluorine = highest electronegativity. Chlorine = highest electron affinity. These rules solve most chem mcq quickly.
1. The pH of a 0.01 M HCl solution is:
2. If Ka = 1 × 10⁻⁵, the pKa value is:
3. A buffer solution contains equal concentrations of weak acid and its salt. The pH of solution will be:
4. If Kw = 1 × 10⁻¹⁴, then pKw is:
5. For reaction: A ⇌ B, if Kc = 1, then:
Use these NEET tricks: pH = −log[H⁺]. pKa = −log Ka. Buffer: when acid = salt → pH = pKa. pKw at 25°C = 14. Kc = 1 → both reactants and products present equally. These help solve advanced chem mcq fast.
1. For the reaction: N₂ + 3H₂ ⇌ 2NH₃, the expression for Kc is:
2. Increasing pressure shifts equilibrium towards:
3. The pH of a neutral solution at 25°C is:
4. If Qc > Kc, the reaction will proceed:
5. Which of the following is a strong acid?
Use these quick NEET rules: Kc = products / reactants (with powers). More pressure → fewer gas moles. Qc > Kc → reaction shifts backward. Strong acids fully dissociate (HCl). These rules solve most chem mcq from Equilibrium easily.
1. If ΔU = 100 J and work done by system = 40 J, then heat absorbed (q) is:
2. For the reaction, ΔH = 50 kJ and ΔS = 100 J/K. At what temperature will ΔG = 0?
3. Which condition makes a reaction spontaneous at all temperatures?
4. The efficiency of a heat engine increases when:
5. For an ideal gas expansion against vacuum, work done is:
Use these NEET tricks: First law → q = ΔU + W. At ΔG = 0 → T = ΔH/ΔS. Always spontaneous → ΔH negative, ΔS positive. Free expansion → work = 0. These shortcuts solve tough chem mcq quickly.
1. For an exothermic reaction, the value of ΔH is:
2. Which of the following is a state function?
3. The relation between ΔH and ΔU is:
4. If ΔG < 0, the reaction is:
5. Which process has ΔS > 0?
Use these quick NEET rules: Exothermic → ΔH negative. State functions depend only on initial and final state. ΔG < 0 → spontaneous. Increase in disorder → ΔS positive. These basics solve most chem mcq from Thermodynamics.
1. Which molecule has maximum number of lone pairs on central atom?
2. The shape of XeF₂ molecule is:
3. Which of the following has highest bond order?
4. Which molecule has sp² hybridisation?
5. Which species is diamagnetic?
Use these NEET tricks: XeF₂ has 3 lone pairs → linear shape. Removing electron increases bond order (O₂⁺ highest). sp² = trigonal planar (BF₃). Diamagnetic = all electrons paired (N₂). These concepts solve advanced chem mcq easily.
1. Which of the following has the highest bond angle?
2. The hybridisation of nitrogen in NH₃ is:
3. Which molecule is polar?
4. Which type of bond is present in NaCl?
5. Which molecule has lone pair on central atom affecting shape?
Use this quick NEET rule: More lone pairs → smaller bond angle. Linear molecules like CO₂ have 180°. NH₃ is polar due to lone pair. Ionic bond forms between metal + non-metal. These rules solve most chem mcq from Chemical Bonding easily.
1. Assertion (A): Atomic radius decreases across a period. Reason (R): Nuclear charge increases across the period.
2. Assertion (A): Benzene is more stable than cyclohexatriene. Reason (R): Benzene has resonance stabilization.
3. Assertion (A): Helium has the highest ionization energy among all elements. Reason (R): Helium has very small atomic size and stable electronic configuration.
4. Assertion (A): Addition of catalyst increases rate of reaction. Reason (R): Catalyst lowers activation energy of reaction.
5. Assertion (A): Phenol is acidic in nature. Reason (R): Phenoxide ion is stabilized by resonance.
In many NEET chemistry questions and answers based on assertion–reason, both statements are correct. The real task is checking if the reason actually explains the assertion. Always evaluate both statements separately before choosing option A.
1. Assertion (A): Transition metals form coloured compounds. Reason (R): d–d electronic transitions occur in transition metal ions.
2. Assertion (A): Noble gases were once called inert gases. Reason (R): They have completely filled valence shells.
3. Assertion (A): Graphite conducts electricity. Reason (R): Each carbon atom in graphite forms three σ bonds and one delocalised π electron.
4. Assertion (A): Increasing pressure favors the side with fewer moles of gas in equilibrium reactions. Reason (R): System tries to reduce pressure according to Le Chatelier’s principle.
5. Assertion (A): Alcohols have higher boiling points than ethers of similar molecular mass. Reason (R): Alcohols form intermolecular hydrogen bonds.
In many NEET assertion–reason chem mcq, both statements are correct. The trick is checking **whether the reason actually explains the assertion**. Always read the reason carefully before selecting option A.
1. Assertion (A): Ionic compounds conduct electricity in molten state. Reason (R): Ions become mobile in molten state.
2. Assertion (A): Fluorine shows only −1 oxidation state. Reason (R): Fluorine has highest electronegativity.
3. Assertion (A): Benzene undergoes substitution reactions rather than addition. Reason (R): Addition reactions destroy aromatic stability.
4. Assertion (A): Increasing temperature increases rate of reaction. Reason (R): Activation energy decreases with temperature.
5. Assertion (A): Buffer solutions resist change in pH. Reason (R): They contain weak acid/base and their conjugate salt.
For assertion–reason chem mcq, always check logic order: Step 1: Is assertion correct? Step 2: Is reason correct? Step 3: Does reason actually explain the assertion? Most NEET traps occur when both statements are true but unrelated.
1. Which molecule has zero dipole moment?
2. Which species has maximum bond dissociation energy?
3. In the reaction: CH3CHO + HCN → Product the reaction type is:
4. Which of the following ions has maximum hydration enthalpy?
5. The hybridisation of carbon atoms in acetylene (C2H2) is:
Use these quick NEET shortcuts: Linear molecules like CO2 have zero dipole moment. Cl–Cl bond is strongest among halogens due to optimal size. Carbonyl compounds undergo nucleophilic addition. Smaller ion + higher charge → higher hydration enthalpy. Triple bond carbon atoms are always sp hybridised. These tricks help solve ultra-level chem mcq quickly in NEET.
1. The number of radial nodes in 3p orbital is:
2. Which complex will show maximum crystal field stabilisation energy (CFSE) in octahedral field?
3. If Kp > Kc for a gaseous reaction, then:
4. The major product of nitration of toluene is:
5. A buffer solution resists change in pH because:
Remember these high-level shortcuts: Radial nodes = n − l − 1. d3 has maximum CFSE in octahedral field. Kp = Kc(RT)^Δn → if Kp > Kc, then Δn > 0. Toluene is ortho-para directing. Buffer = weak acid/base + its salt. These tricks help solve tough chem mcq under time pressure in NEET.
1. The magnetic moment (spin only) of Mn2+ ion is:
2. For the reaction: N2O4(g) ⇌ 2NO2(g), if temperature increases, the equilibrium shifts towards:
3. Which compound shows maximum acidity?
4. The correct order of bond order is:
5. In SN1 reaction, rate depends on:
Use these advanced NEET shortcuts: Mn2+ = 3d5 → 5 unpaired → μ = √n(n+2) = 5.92 BM. N2O4 ⇌ 2NO2 is endothermic forward. More Cl → more –I effect → stronger acid. Remove electron → bond order increases. SN1 rate = k[substrate]. These tricks help crack tough chem mcq in NEET with confidence.
1. The number of unpaired electrons in Fe3+ (Z = 26) is:
2. Which solution will have highest osmotic pressure at same concentration?
3. Which compound will give positive Tollen’s test?
4. The correct order of atomic radius is:
5. For a first order reaction, if half-life is 20 minutes, time required for 75% completion is:
Use these quick NEET shortcuts: Fe3+ = 3d5 → 5 unpaired electrons. More ions → more osmotic pressure (AlCl3 gives 4 particles). Tollen’s test → aldehyde only. Across period → atomic size decreases. 75% completion in first order = 2 half-lives. These tricks solve mixed chem mcq fast in NEET.
1. Which of the following is an analgesic?
2. Ranitidine is used as:
3. Which of the following is a biodegradable detergent?
4. Which drug is used to reduce anxiety?
5. Artificial sweetener that contains chlorine is:
Use this simple exam memory set: Analgesic → pain relief (Paracetamol). Antibiotic → kills bacteria. Tranquilizer → reduces anxiety. Linear detergents are biodegradable. Sucralose contains chlorine. This chapter gives direct theory-based chem mcq, so revise once and score easy marks in NEET and CET.
1. Which of the following is an addition polymer?
2. Natural rubber is a polymer of:
3. Bakelite is formed by condensation of:
4. Which type of polymer is nylon-6,6?
5. Vulcanisation of rubber involves addition of:
Use this simple exam memory trick: Addition polymer → double bond monomer. Nylon and terylene are condensation polymers. Natural rubber is polyisoprene. Vulcanisation uses sulphur to increase strength. These points solve most chem mcq from Polymers in NEET, JEE and MHT-CET.
1. Which of the following is a reducing sugar?
2. The peptide bond in proteins is formed between:
3. Which vitamin is water soluble?
4. The base present in RNA but absent in DNA is:
5. Which level of protein structure is stabilised by hydrogen bonds?
Use this easy exam memory set: Reducing sugar → free aldehyde/ketone group. Peptide bond forms between –COOH and –NH2. Water soluble vitamins are B and C. RNA has Uracil instead of thymine. Secondary structure is stabilised by hydrogen bonding. These points solve most chem mcq from Biomolecules in NEET, JEE and MHT-CET.
1. Which amine is most basic in aqueous solution?
2. Aniline is less basic than methylamine because:
3. Which reagent is used in Hinsberg test?
4. Primary aromatic amines react with NaNO2 + HCl at 0–5°C to form:
5. Which reaction converts amide to amine with one carbon less?
Use this simple exam memory set: In aqueous solution: 2° > 1° > 3° > NH3. Aniline is less basic due to resonance. NaNO2 + HCl (cold) gives diazonium salt. Hoffmann reaction reduces carbon chain by one. These rules solve most chem mcq from Amines in NEET, JEE and MHT-CET.
1. Which reagent distinguishes aldehydes from ketones?
2. Which of the following gives positive iodoform test?
3. Carboxylic acids are more acidic than alcohols due to:
4. Aldol condensation occurs in compounds having:
5. Which compound undergoes Cannizzaro reaction?
Use this simple exam memory set: Aldehyde → positive Fehling’s/Tollen’s. Iodoform test means –COCH3 group. Carboxylic acid is acidic due to resonance. Aldol needs α-hydrogen. No α-H → Cannizzaro reaction. These rules solve most chem mcq from this chapter in NEET, JEE and MHT-CET.
1. Which alcohol reacts fastest with Lucas reagent?
2. Phenol is more acidic than alcohol because:
3. Williamson’s synthesis is used for preparation of:
4. Which of the following undergoes dehydration most easily?
5. Anisole on treatment with HI gives:
Use this easy memory trick: 3° alcohol reacts fastest (stable carbocation). Phenol is acidic due to resonance. Williamson synthesis gives ethers via SN2. Dehydration follows carbocation stability. These rules solve most chem mcq from this chapter in NEET, JEE and MHT-CET.
Practice Chemistry MCQs designed for NEET, JEE, CET and competitive exams. Improve accuracy, speed, and exam readiness with structured question sets on GoPract.
1. Which haloalkane undergoes SN1 reaction most easily?
2. Aryl halides are less reactive towards nucleophilic substitution because:
3. Which reagent is used to convert alcohol to alkyl chloride?
4. Which reaction mechanism is followed by primary haloalkanes?
5. Which of the following gives elimination reaction predominantly?
Use this simple exam rule: 3° → SN1, 1° → SN2. More stable carbocation means faster SN1. Aryl halides resist substitution due to resonance. Strong base with 3° haloalkane gives elimination. These shortcuts solve most chem mcq from this chapter in NEET, JEE and MHT-CET.
1. The coordination number of cobalt in [Co(NH3)6]3+ is:
2. Which of the following is a bidentate ligand?
3. Which type of isomerism is shown by [Co(NH3)5Cl]SO4?
4. The hybridisation of central metal ion in [Ni(CN)4]2− is:
5. Chelation increases the stability of coordination compounds due to:
Use this simple exam memory set: Coordination number = number of donor atoms. Oxalate is bidentate. Strong field ligands like CN− give dsp2 (square planar) complexes. Chelation increases stability due to entropy effect. These rules solve most chem mcq from Coordination Compounds in NEET, JEE and MHT-CET.
1. Which property is shown by most transition metals?
2. The main reason for variable oxidation states in transition metals is:
3. Which element is not considered a transition metal?
4. Lanthanoids show contraction because:
5. Which oxidation state is most stable for lanthanoids?
Remember this exam rule: Transition metals = coloured + variable oxidation states. Zinc is not a true transition metal because its d-orbital is full. Lanthanoid contraction happens due to poor shielding of 4f electrons. +3 is the most stable oxidation state for lanthanoids. These points solve most chem mcq from d- and f-block in NEET, JEE and MHT-CET.
1. Which noble gas forms the compound XeF4?
2. The shape of XeF4 molecule is:
3. Which acid is the strongest among the following?
4. Which of the following shows maximum oxidising property?
5. The +3 oxidation state is more stable than +5 for heavier elements of group 15 due to:
Use this easy exam rule: More oxygen → stronger oxyacid. Fluorine is the strongest oxidising agent. Heavier p-block elements show inert pair effect. XeF4 is square planar due to two lone pairs. These shortcuts help solve most chem mcq from p-Block quickly in NEET, JEE and MHT-CET.
1. The process of removing gangue from ore is called:
2. Roasting is carried out mainly for:
3. Which reducing agent is used in the extraction of iron in blast furnace?
4. In the Hall-Heroult process, cryolite is added to:
5. Which metal is extracted by electrolytic reduction?
Use this simple memory trick: Roasting → Sulphide ore. Calcination → Carbonate ore. Blast furnace uses CO as reducing agent. Cryolite lowers melting point of alumina. Highly reactive metals need electrolysis. These points solve most chem mcq from Metallurgy in NEET, JEE and MHT-CET.
1. Which of the following is an example of adsorption?
2. Physical adsorption is favoured by:
3. Which of the following is a lyophobic colloid?
4. The process used to purify colloidal solutions is called:
5. Which catalyst is used in the Haber process?
Remember this exam trick: Adsorption happens on surface. Physical adsorption likes low temperature + high pressure. Lyophobic sols are unstable and easy to coagulate. Dialysis removes impurities from colloids. Iron catalyst is fixed for Haber process. These points solve most chem mcq from Surface Chemistry in NEET, JEE and MHT-CET.
1. The rate of a chemical reaction depends mainly on:
2. For a first order reaction, the unit of rate constant (k) is:
3. The half-life of a first order reaction depends on:
4. Which graph gives a straight line for a zero-order reaction?
5. A catalyst increases the rate of reaction by:
Remember this exam rule: Order ≠ molecularity. First order reactions have fixed half-life and unit of k as s−1. Zero order shows straight line for concentration vs time. Catalyst only lowers activation energy, it never changes equilibrium. These points help solve most chem mcq from Chemical Kinetics in JEE, NEET and MHT-CET.
1. The standard electrode potential of a cell is positive. This indicates that the cell reaction is:
2. In an electrochemical cell, oxidation always occurs at the:
3. The unit of molar conductivity is:
4. Which of the following increases the conductivity of an electrolyte solution?
5. According to Faraday’s first law of electrolysis, the mass of substance deposited is proportional to:
Remember this easy exam rule: Anode = Oxidation, Cathode = Reduction. Positive E° means the reaction is spontaneous. On dilution, ions move freely, so conductivity increases. For electrolysis, always think: More charge → more mass. These points crack most chem mcq from Electrochemistry in JEE, NEET and MHT-CET.
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