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  9. Q92

HPSC HCS 2024 · Question 92 of 100

Consider the following statements: 1. the range When pH of rain water lies in the range of 6 to 7, it is called acid rain. 2. Tooth enamel starts to corrode when pH of mouth is greater than 7. 3. Under acidic conditions farmers would treat the soil with quick lime. How many of the statements given above are correct?

Science

  1. AOnly one statementCorrect
  2. BOnly two statements
  3. CAll three statements
  4. DNone of the statements

Answer: A. Only one statement

Explanation

Acid rain has pH below 5.6 (not 6-7), and tooth enamel corrodes below pH 5.5 (not above 7). Farmers treat acidic soil with quick lime. Only statement 3 is correct.

Source: HPSC HCS Prelims Paper-I held 11 Feb 2024 (freejobalert PDF)

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