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Maharashtra SSC (Class 10) Science — practice by topic

Browse 749 questions across 18 Science topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Science topics

Effects of Electric Current (96)Environmental & Disaster Management (96)Metals and Non-metals (82)Life Processes in Living Organisms Part 1 (71)Chemical Reactions and Equations (70)Carbon Compounds (46)Periodic Classification of Elements (45)Life Processes in Living Organisms Part 2 (43)Heredity and Evolution (42)Refraction of Light and Lenses (36)Calorimetry (35)Cell Biology and Animal Classification (28)Light and Optics (27)Sound (11)Elements, Compounds and Mixtures (8)Materials: Metals and Non-Metals (7)Life Processes & Human Physiology (4)Transport and Reproduction in Plants (2)

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Which equation best represents the essential ionic change in a neutralization reaction?Read the answer and worked solution →Heating copper nitrate crystals produces black copper oxide, reddish-brown nitrogen dioxide, and oxygen. This reaction is best classified asRead the answer and worked solution →Each testis is divided into approximately how many compartments called testicular lobules?Read the answer and worked solution →Each seminiferous tubule is lined on its inside by two types of cells:Read the answer and worked solution →

Worked practice questions

Which equation best represents the essential ionic change in a neutralization reaction?

  1. $\mathrm{Na^+ + Cl^- \rightarrow NaCl}$
  2. $\mathrm{H^+ + OH^- \rightarrow H_2O}$
  3. $\mathrm{Ag^+ + Cl^- \rightarrow AgCl}$
  4. $\mathrm{Mg + O \rightarrow MgO}$
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Correct answer: B. $\mathrm{H^+ + OH^- \rightarrow H_2O}$

Neutralization is fundamentally the reaction between hydrogen ions from an acid and hydroxide ions from a base to form water: $\mathrm{H^+ + OH^- \rightarrow H_2O}$. The other options describe salt formation, precipitation, or oxidation.

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Heating copper nitrate crystals produces black copper oxide, reddish-brown nitrogen dioxide, and oxygen. This reaction is best classified as

  1. combination
  2. displacement
  3. thermal decomposition
  4. neutralization
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Correct answer: C. thermal decomposition

A single compound, copper nitrate, breaks down into simpler substances on heating. Since heat causes the breakdown, it is a thermal decomposition reaction.

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Each testis is divided into approximately how many compartments called testicular lobules?

  1. 100
  2. 250
  3. 1000
  4. 50
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Correct answer: B. 250

Each testis contains about **250 testicular lobules**, each housing 1–3 highly coiled seminiferous tubules where sperms are produced.

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