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Virat
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Observe the following diagram showing the conditions under which a metal ‘M’ corrodes. List your observations in each of the three cases A, B and C with the reason, if the metal ‘M’ is generally protected against corrosion by the method of galvanisation.

Case A: Significant corrosion will be observed on the metal surface because the protective zinc coating on the metal readily react with oxygen and the moisture present in the moist air. class 10 free sample paper for 2026 board exam class 10 ...

class 10 free sample paper for 2026 board examclass 10 science half yearly paperclass 10 science half yearly paper on tiwari academydiagram showing the conditions under which a metal
Virat
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Study the diagram given below and answer the questions: (i) Name the defect of vision represented in the diagram. (ii) Redraw the diagram and show how a corrective lens resolves this defect? Label the lens type and focal point.

Myopia (nearsightedness) — image forms in front of the retina because the eye’s lens is too strong (focal length too short) or the eyeball is too long. class 10 free sample paper for 2026 board exam class 10 science half yearly paper ...

class 10 free sample paper for 2026 board examclass 10 science half yearly paperdiagram given belowhow a corrective lens resolves this defect
Virat
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The correct answer is option (d) III and IV. Myopia occurs when the focal length of the eye lens is too short or the eyeball is elongated, causing the image to form in front of the retina. class 10 science half ...

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Virat
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The electronic configuration of elements X (2, 4) and Y (2, 8, 1) is given. Based on the information given above, answer the following questions: (a) Which type of bond is formed between X and Y? Explain with reason. (b) How many valence electrons take part in the bond formation between X and Y? Explain. (c) Give the chemical formula of the compound. (d) State one physical property of this compound based on the type of bonding. (e) Write the chemical equation for the reaction of Y with ethanoic acid.

The bond formed between X and Y is a covalent bond, because element X (carbon) shares its valence electrons with element Y (hydrogen – like or sodium) to achieve a stable configuration. Download cbse sample paper for class 10 science class 10 ...

class 10 free sample paper for 2026 board examclass 10 science half yearly paperclass 10 science half yearly paper on tiwari academy