The answer is true a convex lens can produce a real image but not a viral image
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Gas like oxygen, nitrogen etc
Answer:A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
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According to Oxford Dictionaries "Precision" means "the quality, condition, or fact of being exact and accurate."
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