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Give any two uses of pH in everyday life other than mentioned in the context.
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Nov 15, 2023
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Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
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Nov 15, 2023
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A person is unable to see objects distinctly placed within 75 cm from his eyes.
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How does blood sugar level get regulated in the human body?
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Nov 14, 2023
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Flow of energy in a food chain is unidirectional. Justify the statement.
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Nov 14, 2023
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An organic compound ‘X’ is a liquid at room temperature. It is also a very good solvent and has the molecular formula
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An organic compound ‘P’ is a constituent of wines. ‘P’ on reacting with acidified K2Cr2O7 forms another compound ‘Q’.
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Nov 14, 2023
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Draw the pattern of the magnetic field lines around a current-carrying solenoid.
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Nov 13, 2023
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A current of 10 A flows through a conductor for two minutes. (i) Calculate the amount of charge passing through
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Nov 13, 2023
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An object is placed at a distance of 60 cm from a concave lens of focal length 30 cm.
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Nov 13, 2023
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A 4 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 20 cm.
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Nov 13, 2023
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Given below are some disorders noticed in some patients. It could it be due to malfunctioning of which part of brain
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Nov 13, 2023
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State any three reasons to justify the use of contraceptive methods.
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Nov 13, 2023
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Metal ‘A’ is used in the thermite process as a reducing agent. When ‘A’ is heated with oxygen it gives an oxide
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Nov 13, 2023
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Sakshi was comparing the reactivity of different metals for her science project. She added iron filings in four test
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Nov 13, 2023
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Marked decline in the thickness of ozone layer was noticed in the 1980s. Which human activity can be held accountable
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Nov 12, 2023
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State the rule to determine the direction of the force experienced by a current-carrying straight conductor placed
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Nov 12, 2023
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Imagine a current carrying circular loop of wire on the plane of your answer sheet. The magnetic field inside the loop
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Nov 12, 2023
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Give reasons for the following: (a) Red traffic signals can be seen from a very long distance.
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Nov 12, 2023
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What is the advantage of having a four-chambered heart in birds and mammals?
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Nov 12, 2023
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