Class 10 Science and Technology Part 1 – Daily Revision MCQ (English Medium)
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The value of the acceleration due to gravity (g) on the Moon's surface is about what part of its value on the Earth?
Chapter 1: Gravitation
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Answer: C. 1/6
The Moon's gravitational acceleration is about one-sixth of the Earth's, which is why we could jump about 6 times higher there.According to Newlands' law of octaves, which element shows properties similar to the first element in his arrangement?
Chapter 2: Periodic Classification of Elements
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Answer: A. Every eighth element
Newlands found that every eighth element had properties similar to the first, e.g. sodium is the eighth element from lithium.When hydrogen gas is passed over heated black copper oxide, the reaction is CuO + H₂ → Cu + H₂O. Which reactant undergoes reduction?
Chapter 3: Chemical Reactions and Equations
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Answer: B. CuO
CuO loses its oxygen to form Cu, so CuO is reduced; H₂ gains oxygen to form H₂O, so hydrogen is oxidised.In Fleming's left hand rule, the thumb, index finger and middle finger are held perpendicular to each other. What does the thumb show?
Chapter 4: Effects of Electric Current
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Answer: D. Direction of the force on the conductor
The index finger shows the magnetic field, the middle finger the current, and the thumb the direction of the force on the conductor.How much heat is needed to raise the temperature of 2 kg of water from 25 °C to 75 °C? (specific heat of water = 1 kcal/kg °C)
Chapter 5: Heat
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Answer: B. 100 kcal
Heat = m × c × ΔT = 2 × 1 × (75 − 25) = 100 kcal.Light travels at 3 × 10⁸ m/s in vacuum and at 2 × 10⁸ m/s in a certain glass. What is the absolute refractive index of that glass?
Chapter 6: Refraction of Light
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Answer: A. 1.5
Absolute refractive index = speed of light in vacuum ÷ speed in the medium = (3 × 10⁸) ÷ (2 × 10⁸) = 1.5.A person can see nearby objects clearly but distant objects look blurred. Which lens in the spectacles corrects this defect?
Chapter 7: Lenses
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Answer: D. Concave lens
This is nearsightedness (myopia); a concave lens of suitable focal length diverges the rays so the image forms on the retina.Bauxite, which is concentrated by the leaching method using aqueous NaOH, is an ore of which metal?
Chapter 8: Metallurgy
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Answer: C. Aluminium
Bauxite is the ore of aluminium; soaking it in aqueous NaOH dissolves its main component, alumina.Vinegar, used as a preservative in pickles, is a 5–8% aqueous solution of which compound?
Chapter 9: Carbon Compounds
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Answer: A. Acetic acid (ethanoic acid)
Vinegar is a 5–8% solution of acetic acid, whose IUPAC name is ethanoic acid.In which year did ISRO launch its spacecraft 'Mangalyaan' to Mars?
Chapter 10: Space Missions
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Answer: B. 2013
Mangalyaan was launched in November 2013 and was placed in orbit around Mars in September 2014.
Class 10: MCQ in other subjects
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All questions are written by PadhaiNotes in our own words from the chapters of the official Maharashtra State Board Balbharati textbook (ebalbharati.in). Each question shows its chapter.