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Module Progress: Criteria for Purity

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Criteria for Purity

question 1 of 3 Grade: Ten - G10
question 1 of 3 Grade: Ten - G10

Q: What term describes a substance with no impurities?

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Did You Know?

The correct answer is: 'John said that he had to finish that work by the next day.' Modal verb 'must' can become 'had to' in indirect speech when it expresses obligation. 'This' becomes 'that', and 'tomorrow' becomes 'the next day'. Example: Direct: 'I must go now,' she said. Indirect: She said that she had to go then.

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Did You Know?

The correct answer is: 'John said that he had to finish that work by the next day.' Modal verb 'must' can become 'had to' in indirect speech when it expresses obligation. 'This' becomes 'that', and 'tomorrow' becomes 'the next day'. Example: Direct: 'I must go now,' she said. Indirect: She said that she had to go then.

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