Question

When non-metal react with water then

hydrogen gas is fromed

carbon dioxide gas is formed

non-metals do not react with water

carbon monoxide gas is formed

None of these



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Answer 1

hydrogen gas is formed

The number of images of an object placed between two mirrors can be found from the following formula. When the angle between the mirrors is 90°, the number of images is (360/90°)-1 = 4-1 = 3. Similarly, when the angle is 60°, the number of images is (360/60°)-1=6-1 = 5.