10th Science (Physics) One-Mark Question Bank

Objective questions in physics test your conceptual clarity and attention to detail. This comprehensive Class 10 Science (Physics) One-Mark Question Bank isolates the objective portions of your physics chapters into a dedicated practice hub. Packed with high-yield multiple-choice questions (MCQs), SI unit identifiers, formula-based rapid questions, and assertion-reason problems, this resource ensures you clear up your fundamentals, master your circuit and lens laws, and lock in perfect marks in the objective sections.

SSLC 10TH PHYSICS BOOKBACK ONEMARKS UNIT: 7-11

Unit 7: ATOMS AND MOLECULES

1. Which of the following has the smallest mass?
a. 6.023 × 10²³ atoms of He b. 1 atom of He
c. 2 g of He d. 1 mole atoms of He

2. Which of the following is a triatomic molecule?
a. Glucose b. Helium c. Carbon dioxide d. Hydrogen

3. The volume occupied by 4.4 g of CO₂ at S.T.P
a. 22.4 litre b. 2.24 litre c. 0.24 litre d. 0.1 litre

4. Mass of 1 mole of Nitrogen atom is
a. 28 amu b. 14 amu c. 28 g d. 14 g

5. Which of the following represents 1 amu?
a. Mass of a C - 12 atom b. Mass of a hydrogen atom c. 1/12th of the mass of a C - 12 atom d. Mass of O - 16 atom

6. Which of the following statement is incorrect?
a. 12 gram of C - 12 contains Avogadro's number of atoms. b. One mole of oxygen gas contains Avogadro's number of molecules. c. One mole of hydrogen gas contains Avogadro's number of atoms. d. One mole of electrons stands for 6.023 × 10²³ electrons.

7. The volume occupied by 1 mole of a diatomic gas at S.T.P is
a. 11.2 litre b. 5.6 litre c. 22.4 litre d. 44.8 litre

8. In the nucleus of ₂₀Ca⁴⁰, there are
a. 20 protons and 40 neutrons b. 20 protons and 20 neutrons
c. 20 protons and 40 electrons d. 40 protons and 20 electrons

9. The gram molecular mass of oxygen molecule is
a. 16 g b. 18 g c. 32 g d. 17 g

10. 1 mole of any substance contains _______ molecules.
a. 6.023 × 10²³ b. 6.023 × 10^-23 c. 3.0115 × 10²³ d. 12.046 × 10²³

Unit 8: PERIODIC CLASSIFICATION OF ELEMENTS

1. The number of periods and groups in the periodic table are
a) 6, 16 b) 7, 17 c) 8, 18 d) 7, 18

2. The basis of modern periodic law is
a) atomic number b) atomic mass c) isotopic mass d) number of neutrons

3. _______ group contains the member of halogen family.
a) 17^th b) 15^th c) 18^th d) 16^th

4. _______ is a relative periodic property
a) atomic radii b) ionic radii c) electron affinity d) electronegativity

5. Chemical formula of rust is
a) FeO·xH₂O b) FeO₄·xH₂O c) Fe₂O₃·xH₂O d) FeO

6. In the alumino thermic process the role of Al is
a) oxidizing agent b) reducing agent c) hydrogenating agent d) sulphurising agent

7. The process of coating the surface of metal with a thin layer of zinc is called
a) painting b) thinning c) galvanization d) electroplating

8. Which of the following inert gases have 2 electrons in the outermost shell.
a) He b) Ne c) Ar d) Kr

9. Neon shows zero electron affinity due to
a) stable arrangement of neutrons b) stable configuration of electrons c) reduced size d) increased density

10. _______ is an important metal to form amalgam.
a) Ag b) Hg c) Mg d) Al

Unit 9: SOLUTIONS

1. A solution is a _______ mixture.
a. homogeneous b. heterogeneous c. homogeneous and heterogeneous d. non homogeneous

2. The number of components in a binary solution is
a. 2 b. 3 c. 4 d. 5

3. Which of the following is the universal solvent?
a. Acetone b. Benzene c. Water d. Alcohol

4. A solution in which no more solute can be dissolved in a definite amount of solvent at a given temperature is called
a. Saturated solution b. Unsaturated solution c. Super saturated solution d. Dilute solution

5. Identify the non aqueous solution.
a. sodium chloride in water b. glucose in water c. copper sulphate in water d. sulphur in carbon-di-sulphide

6. When pressure is increased at constant temperature the solubility of gases in liquid
a. No change b. increases c. decreases d. no reaction

7. Solubility of NaCl in 100 ml water is 36 g. If 25 g of salt is dissolved in 100 ml of water how much more salt is required for saturation
a. 12g b. 11g c. 16g d. 20g

8. A 25% alcohol solution means
a. 25 ml alcohol in 100 ml of water b. 25 ml alcohol in 25 ml of water c. 25 ml alcohol in 75 ml of water d. 75 ml alcohol in 25 ml of water

9. Deliquescence is due to
a. Strong affinity to water b. Less affinity to water c. Strong hatred to water d. Inertness to water

10. Which of the following is hygroscopic in nature?
a. ferric chloride b. copper sulphate penta hydrate c. silica gel d. none of the above

Unit 10: TYPES OF CHEMICAL REACTIONS

1. H_2(g) + Cl_2(g) → 2HCl_(g) is a
a. Decomposition Reaction b. Combination Reaction c. Single Displacement Reaction d. Double Displacement Reaction

2. Photolysis is a decomposition reaction caused by
a. heat b. electricity c. light d. mechanical energy

3. A reaction between carbon and oxygen is represented by C_(s) + O_2(g) → CO_2(g) + Heat.
In which of the type(s), the above reaction can be classified?
(i) Combination Reaction (ii) Combustion Reaction (iii) Decomposition Reaction (iv) Irreversible Reaction
a. i and ii b. i and iv c. i, ii and iii d. i, ii and iv

4. The chemical equation Na₂SO_4(aq) + BaCl_2(aq) → BaSO_4(s)↓ + 2NaCl_(aq) represents which of the following types of reaction?
a. Neutralisation b. Combustion c. Precipitation d. Single displacement

5. Which of the following statements are correct about a chemical equilibrium?
(i) It is dynamic in nature
(ii) The rate of the forward and backward reactions are equal at equilibrium
(iii) Irreversible reactions do not attain chemical equilibrium
(iv) The concentration of reactants and products may be different
a. i, ii and iii b. i, ii and iv c. ii, iii and iv d. i, iii and iv

6. A single displacement reaction is represented by X_(s) + 2HCl_(aq) → XCl_2(aq) + H_2(g). Which of the following(s) could be X?
(i) Zn (ii) Ag (iii) Cu (iv) Mg
Choose the best pair:
a. i and ii b. ii and iii c. iii and iv d. i and iv

7. Which of the following is not an "element + element → compound" type reaction?
a. C_(s) + O_2(g) → CO_2(g) b. 2K_(s) + Br_2(l) → 2KBr_(s) c. 2CO_(g) + O_2(g) → 2CO_2(g) d. 4Fe_(s) + 3O_2(g) → 2Fe₂O_3(s)

8. Which of the following represents a precipitation reaction?
a. A(s) + B(s) → C(s) + D(s) b. A(s) + B(aq) → C(aq) + D(l) c. A(aq) + B(aq) → C(s) + D(aq) d. A(aq) + B(s) → C(aq) + D(l)

9. The pH of a solution is 3. Its [OH^-] concentration is
a. 1 × 10^-3 M b. 3 M c. 1 × 10^-11 M d. 11 M

10. Powdered CaCO₃ reacts more rapidly than flaky CaCO₃ because of
a. large surface area b. high pressure c. high concentration d. high temperature

Unit 11: CARBON AND ITS COMPOUNDS

1. The molecular formula of an open chain organic compound is C₃H₆. The class of the compound is
a. alkane b. alkene c. alkyne d. alcohol

2. The IUPAC name of an organic compound is 3-Methyl butan-1-ol. What type compound it is?
a. Aldehyde b. Carboxylic acid c. Ketone d. Alcohol

3. The secondary suffix used in IUPAC nomenclature of an aldehyde is
a. - ol b. - oic acid c. - al d. - one

4. Which of the following pairs can be the successive members of a homologous series?
a. C₃H₈ and C₄H₁₀ b. C₂H₂ and C₂H₄ c. CH₄ and C₃H₆ d. C₂H₅OH and C₄H₈OH

5. C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O is a
a. Reduction of ethanol b. Combustion of ethanol c. Oxidation of ethanoic acid d. Oxidation of ethanal

6. Rectified spirit is an aqueous solution which contains about _______ of ethanol.
a. 95.5% b. 75.5% c. 55.5% d. 45.5%

7. Which of the following are used as anaesthetics?
a. Carboxylic acids b. Ethers c. Esters d. Aldehydes

8. TFM in soaps represents _______ content in soap
a. mineral b. vitamin c. fatty acid d. carbohydrate

9. Which of the following statements is wrong about detergents?
a. It is a sodium salt of long chain fatty acids b. It is sodium salts of sulphonic acids c. The ionic part in a detergent is -SO₃^-Na⁺ d. It is effective even in hard water.