Daily free Chemistry questions for NEET, JEE (Foundation), MHT-CET and other competitive exams.
Last Updated: 05 Feb 2026
1. Which molecule has zero dipole moment?
2. The shape of the ammonia (NH3) molecule is:
3. Which type of hybridisation is present in carbon dioxide (CO2)?
4. Which bond is the strongest among the following?
5. According to VSEPR theory, lone pair–lone pair repulsion is:
Remember this exam rule: Lone pair repulsion > Bond pair repulsion. Shape depends on electron pairs, not atoms. Symmetrical molecules like CO2 have zero dipole moment. If you fix shape first, most chem mcq from this chapter become easy in JEE, NEET and MHT-CET.
1. Which element has the highest first ionisation energy among the following?
2. Atomic radius generally decreases across a period because:
3. Which element shows the most negative electron gain enthalpy?
4. The basic character of oxides increases in which direction of the periodic table?
5. Which of the following elements shows variable oxidation states most commonly?
Use this simple exam rule: Across period → size ↓, energy ↑. Down group → size ↑, energy ↓. Chlorine beats fluorine in electron gain due to less crowding. Transition metals show variable oxidation states. These shortcuts help solve most chem mcq in JEE, NEET and MHT-CET quickly.
1. The maximum number of electrons that can be present in a subshell with l = 2 is:
2. Which of the following sets of quantum numbers represents a valid electron?
3. The number of orbitals present in the third shell (n = 3) is:
4. Which transition in a hydrogen atom will produce radiation of the highest energy?
5. According to Heisenberg uncertainty principle, it is impossible to accurately determine:
Remember these three exam rules: Orbitals = n², Electrons = 2n², Higher fall → higher energy. Always check if l = 0 to (n − 1) before selecting quantum numbers. These rules solve most chem mcq from this chapter in JEE, NEET, and MHT-CET without calculation.
1. How many moles of oxygen atoms are present in 8.8 g of carbon dioxide (CO2)?
2. The percentage by mass of hydrogen in water (H2O) is closest to:
3. Which of the following has the maximum number of significant figures?
4. If the empirical formula of a compound is CH2 and its molar mass is 42 g mol−1, the molecular formula is:
5. Which of the following quantities is expressed in the SI unit mole?
Use this simple rule for exams: Mass → Mole → Atoms. Always convert given mass into moles first. For formulas, remember: Molecular mass ÷ Empirical mass = multiplier. If you follow this order, most chem mcq from this chapter become easy in JEE, NEET, and MHT-CET.
1. Which of the following is an example of an analgesic?
2. Which drug is used to reduce acidity in the stomach?
3. Which of the following is a broad spectrum antibiotic?
4. Which chemical is commonly used as an antiseptic?
5. Artificial sweeteners are used mainly because they:
Remember this simple NEET trick: Analgesic → pain relief, Antacid → acidity relief, Antibiotic → kills bacteria. Artificial sweeteners give sweetness without calories. This chapter gives direct chem mcq in exams, so read NCERT lines carefully and revise daily.
1. Which of the following is a natural polymer?
2. Which polymer is formed by addition polymerisation?
3. Which polymer is used to make non-stick cookware?
4. Which of the following is a biodegradable polymer?
5. Bakelite is an example of:
Remember this simple NEET rule: Addition polymer → one monomer. Condensation polymer → two monomers + water loss. Natural polymers come from plants or animals. Bakelite never melts again because it is thermosetting. Keep these points in mind and you can solve most chem mcq from Polymers easily.
1. Which amine is the strongest base in aqueous solution?
2. Which test is used to distinguish primary, secondary and tertiary amines?
3. Which amine gives a positive carbylamine test?
4. Aniline is less basic than methylamine because:
5. Which compound is formed when aniline reacts with nitrous acid at 0–5°C?
Remember this simple NEET rule: 2° amine > 1° amine > 3° amine in basic strength in water. Only primary amines give carbylamine test. Aniline is weak because its lone pair joins the benzene ring. If you remember these three points, you can solve most chem mcq from Amines without confusion.
1. Which compound gives a positive Tollens’ test?
2. Which functional group is present in carboxylic acids?
3. Which compound shows the highest boiling point?
4. Which reagent converts aldehydes into carboxylic acids?
5. Which compound does NOT show iodoform test?
Remember this NEET rule: Aldehyde = Oxidation easy, Ketone = Oxidation hard. Carboxylic acids have the highest boiling point due to strong hydrogen bonding. If you remember Tollens’, Fehling’s, and iodoform tests clearly, you can solve most chem mcq from this chapter without confusion.
1. Which alcohol shows the highest boiling point?
2. Phenol is more acidic than ethanol because phenoxide ion is:
3. Which reagent converts phenol into tribromophenol?
4. Which ether forms explosive peroxides on standing in air?
5. Which reaction is used to prepare ethers from alcohols?
NEET often tests acidity order, boiling point trends, and named reactions from this chapter. Phenol is more acidic due to resonance stabilization. Primary alcohols show higher boiling points due to stronger hydrogen bonding. Williamson synthesis is the most important method to form ethers. Practice such chem mcq regularly to answer chemistry questions with confidence in the exam.
1. Which bond breaks during a nucleophilic substitution reaction in haloalkanes?
2. Which alkyl halide undergoes SN1 reaction most easily?
3. Which solvent favors the SN1 mechanism?
4. Which halogen atom forms the strongest bond with carbon?
5. Which compound is an example of a haloarene?
In NEET chem mcq, this chapter tests reaction mechanism. Remember the order: tertiary > secondary > primary for SN1. Polar solvents support SN1 reactions. Strong C–F bond makes fluorides less reactive. Practice such chemistry questions and answers daily on GoPract.
1. Which hydrocarbon shows aromatic character?
2. Which reagent is used to distinguish between alkanes and alkenes?
3. The general formula of alkynes is:
4. Which reaction is shown by alkanes mainly?
5. Which hydrocarbon gives a sooty flame on burning?
In NEET chem mcq, hydrocarbons test basic concepts. Focus on general formula, reactions, and flame test. Aromatic compounds give sooty flame. Practice such chemistry questions and answers daily. This habit helps you answer chemistry questions with confidence in exam.
1. Which effect explains the permanent displacement of electrons in a covalent bond?
2. Which carbocation is the most stable?
3. Which of the following shows a +I effect?
4. Which species acts as a nucleophile?
5. Which type of reaction involves movement of a pair of electrons?
GOC builds the base of organic chemistry. NEET asks logic, not memory. Focus on effects like inductive and resonance. Compare stability step by step. Daily MCQ practice on GoPract helps in exam preparation and improves your speed when you study for exam.
1. Which gas is the main cause of acid rain?
2. Which pollutant causes photochemical smog?
3. Which layer of the atmosphere absorbs harmful UV rays?
4. Which chemical is responsible for ozone layer depletion?
5. Which gas is known as a greenhouse gas?
In NEET Exam Preparation, this chapter gives direct questions. Read NCERT lines carefully. Focus on gases, layers, and causes. Do not guess. Revise facts daily. Practice such MCQs on GoPract to study for exam with confidence.
1. Which group 15 element shows maximum tendency to form multiple bonds?
2. Which oxide of nitrogen is neutral in nature?
3. Which allotrope of phosphorus is the most reactive?
4. Which halogen has the highest electronegativity?
5. Which acid is formed when nitrogen dioxide reacts with water?
In NEET Exam Preparation, p-Block questions often come directly from NCERT facts. Focus on trends, oxides, and allotropes. Revise reactions daily. This habit helps you study for exam with confidence. Practice MCQs on GoPract to avoid silly mistakes.
1. Which of the following alkali metals has the highest hydration enthalpy?
2. Which alkaline earth metal sulphate is insoluble in water?
3. The anomalous behaviour of lithium compared to other alkali metals is mainly due to:
4. Which of the following compounds is used in the Solvay process for the manufacture of sodium carbonate?
5. Which of the following statements about alkaline earth metals is correct?
In NEET Exam Preparation, s-Block questions are often NCERT-line based. Focus on trends like hydration enthalpy, solubility of sulphates and anomalous behaviour of lithium. Regular MCQ practice on GoPract helps you study for exam smartly and avoid common trap options.
1. Which of the following hydrides is saline in nature?
2. Which of the following metals reacts with hydrogen to form an interstitial hydride?
3. Heavy water (D2O) is mainly used:
4. Which of the following statements regarding hydrogen peroxide is correct?
5. The oxidation state of oxygen in hydrogen peroxide (H2O2) is:
Hydrogen forms three main types of hydrides: ionic (saline), covalent and interstitial. Hydrogen peroxide is a special compound where oxygen has an oxidation state of −1, allowing it to behave as both an oxidising and a reducing agent — a frequently tested NEET concept.
1. In the reaction MnO4− + 8H+ + 5e− → Mn2+ + 4H2O, the number of electrons gained per manganese atom is:
2. Which of the following species acts as an oxidising agent in the reaction: Zn + Cu2+ → Zn2+ + Cu ?
3. The oxidation number of sulphur in sodium thiosulphate (Na2S2O3) is:
4. Which of the following reactions is an example of a disproportionation reaction?
5. In acidic medium, which of the following is the correct balancing factor for electrons while balancing the reaction between Fe2+ and dichromate ion (Cr2O72−)?
Oxidation number is a powerful tool to identify oxidation and reduction. In complex ions like thiosulphate, individual atoms may have different oxidation states, so an average value is used. Disproportionation reactions involve the same element undergoing both oxidation and reduction — a very common NEET trap.
1. For the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), if the equilibrium constant Kc is very large, it indicates that:
2. Which of the following changes will increase the yield of products for an exothermic reaction at equilibrium?
3. The unit of equilibrium constant Kc for the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) is:
4. Which of the following statements is correct for a catalyst in an equilibrium reaction?
5. For the equilibrium H2(g) + I2(g) ⇌ 2HI(g), if the initial concentrations of H2 and I2 are equal, then at equilibrium:
The equilibrium constant (Kc) depends only on temperature. A catalyst does not change the position of equilibrium or the value of Kc; it only helps the system reach equilibrium faster by increasing the rate of both forward and backward reactions.
1. Which of the following quantities is a state function?
2. For an endothermic reaction carried out at constant pressure, which of the following is correct?
3. The relation between enthalpy change (ΔH) and internal energy change (ΔU) for a reaction involving change in gaseous moles is:
4. Which of the following processes is spontaneous at all temperatures?
5. The efficiency of a reversible heat engine operating between two temperatures depends on:
Always remember: ΔG = ΔH − TΔS. For spontaneity at all temperatures, the condition must be ΔH < 0 and ΔS > 0 — this concept is repeatedly tested in NEET through tricky options.
1. Which of the following gases deviates most from ideal gas behaviour at high pressure and low temperature?
2. The value of compressibility factor (Z) for an ideal gas is:
3. Which of the following factors is responsible for the high boiling point of water?
4. At constant temperature, the pressure of a gas is doubled. What happens to the volume of the gas?
5. Which of the following statements is correct regarding real gases?
Real gases deviate most from ideal behaviour at high pressure and low temperature. Remember: gases with strong intermolecular forces (like CO2) deviate more and are easier to liquefy — a very common NEET trap.
1. Which of the following molecules has zero dipole moment?
2. The molecular shape of ammonia (NH3) is:
3. The central atom in SF6 undergoes which type of hybridisation?
4. Which of the following substances shows the strongest hydrogen bonding?
5. The bond order of the oxygen molecule (O2) according to molecular orbital theory is:
1. Which of the following properties generally increases from left to right across a period in the periodic table?
2. Which element has the maximum electron gain enthalpy?
3. The correct order of increasing atomic radius among the following elements is: O, F, N, C
4. The first ionization enthalpy of oxygen is less than that of nitrogen because:
1. The maximum number of electrons that can be accommodated in a shell with principal quantum number n = 4 is:
2. Which of the following sets of quantum numbers is not allowed?
3. The wavelength of radiation associated with an electron moving in the first orbit of hydrogen atom is given by:
4. Which transition in the hydrogen atom corresponds to the emission of radiation of maximum wavelength?
5. Which of the following orbitals has a dumbbell shape?
1. How many significant figures are present in the measurement 0.004560?
2. The number of atoms present in 0.1 mole of sodium is approximately:
3. What is the mass of one mole of electrons? (Mass of one electron = 9.1 × 10−28 g)
4. A compound contains 40% carbon, 6.7% hydrogen and 53.3% oxygen by mass. The empirical formula of the compound is:
5. Which of the following quantities has the same numerical value in SI and CGS systems?
1. The number of moles of KMnO4 required to oxidize 1 mole of Fe2+ ions in acidic medium is:
2. For a first-order reaction, if the rate constant is doubled, the half-life of the reaction will:
3. Which of the following compounds undergoes SN1 reaction most readily?
4. Which of the following reagents converts an aldehyde directly into a primary alcohol?
5. Which of the following species is paramagnetic?
1. At 25°C, the vapour pressure of pure water is 23.8 mm Hg. When a non-volatile solute is added, the vapour pressure becomes 22.6 mm Hg. The mole fraction of the solute in the solution is:
2. For a reaction, the half-life is independent of the initial concentration of the reactant. The order of the reaction is:
3. Which of the following reactions proceeds via a free radical mechanism?
4. Which of the following compounds gives a positive iodoform test?
5. The coordination number and geometry of the complex [Ni(CO)₄] are respectively:
1. A sample contains 3.01 × 1023 molecules of a gas X. The mass of the sample is 16 g. The molecular mass of gas X is:
2. For a spontaneous process at constant temperature and pressure, which of the following conditions must be satisfied?
3. Which of the following carbocations is the most stable?
4. When propene reacts with HBr in the presence of peroxide, the major product formed is:
5. What is the oxidation state of cobalt in the complex [Co(NH₃)₆]Cl₃?
1. How many moles of oxygen atoms are present in 11.2 L of carbon dioxide gas at STP?
2. Which reagent is used to distinguish between aldehydes and ketones?
3. Which of the following has the highest lattice energy?
4. For a first-order reaction, the time required to complete 75% of the reaction is:
5. Which of the following compounds shows geometrical isomerism?
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