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What do you know about tidal power?

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What are complex salts?

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Explain how water acts as universal solvent?

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Explain the chemistry of removing the temporary hardness by boiling water

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Give chemical reactions of alkynes?

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What is the cause of different colour of hair

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Which are the basic components of communication system?

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What do you know about rocket namely Skua?

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How organic compounds are used as clothing?

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Describe the source, uses and deficiency symptoms of water soluble vitamins?

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How the atmosphere around the earth is divided into different layers explain?

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Explain a reversible reaction with the help of a graph?

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How many natural system our planet the Earth has? Also describe what is atmosphere?

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How urea is manufactured? Explain showing the flows sheet diagram?

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What are oligosaccharides. Give their characteristics?

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Natural fertilizer are better than synthetic fertilizer. Explain?

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Why does the author use the terms “fast food”, “slow food

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What do you know about electricity?

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Define soft and hard water. Explain causes of hardness in water also give types of hardness of water?

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Why CO considered a health hazard?

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