Q2. Power of a lens is found to be
Q3. Identify the name and colour of the precipitate formed on mixing of solutions of lead
(II) nitrate and potassium iodide. (1)क्वेश्चन 4
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Potassium iodide reacts with lead(II) nitrate and produces lead(II) iodide and potassium nitrate. Potassium nitrate is water soluble. ... The lead ions and iodide ions will eventually meet to form a yellow precipitate. They do not meet exactly in the middle of the Petri dish.
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Answer:
Q2.power of lens is derived
when we divide 1 by focal length of lens
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