Question

Name the different apparatus where we are using the convex and concave lenses.

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Answer 1

Answer. concave lenses are used for correcting myopia and convex lenses are used for correcting hypermetropia. concave lenses are used in a variety of technical and scientific products. convex lenses are used in binoculars and telescope.

Answer 2

Answer:

carbon dioxide gas

The ethanoic acid reacts with the sodium hydrogen carbonate to form carbon dioxide gas and water. The carbon dioxide gas produced rushes away from the solution.