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Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed ?
(i) It is an endothermic reaction.
(ii) It is an exothermic reaction.
(iii) The pH of the resulting solution will be more than seven.
(iv) The pH of the resulting solution will be less than seven.
  • a)
    (i) and (ii)
  • b)
    (ii) and (iii)
  • c)
    (i) and (iv)
  • d)
    (iii) and (iv)
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Solid calcium oxide reacts vigorously with water to form calcium hydro...
Quick lime(CaO) combines with water to form calcium hydroxide (Ca(OH)2). It is an exothermic reaction as heat is produced in the reaction.  
CaO + H2O → Ca(OH)2 + heat
On  adding excess of calcium hydroxide in water, a saturated solution of calcium hydroxide is formed which is called lime water. Lime water is basic in nature and therefore has a pH above 7.
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Most Upvoted Answer
Solid calcium oxide reacts vigorously with water to form calcium hydro...
CaO(s)plusH2O--Ca(OH)2(aq)plus HEAT.



It realese heat thearefore this reaction is exothermic.AND Calcium hydroxide is a base thearefore PH is more than 7.
answer=2&3
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Community Answer
Solid calcium oxide reacts vigorously with water to form calcium hydro...
Because when calcium oxide is react with water then large amount of heat is produced which is an exothermic reaction and calcium hydroxide is produced is base.
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Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed ?(i) It is an endothermic reaction.(ii) It is an exothermic reaction.(iii) The pH of the resulting solution will be more than seven.(iv)The pH of the resulting solution will be less than seven.a)(i) and (ii)b)(ii) and (iii)c)(i) and (iv)d)(iii) and (iv)Correct answer is option 'B'. Can you explain this answer?
Question Description
Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed ?(i) It is an endothermic reaction.(ii) It is an exothermic reaction.(iii) The pH of the resulting solution will be more than seven.(iv)The pH of the resulting solution will be less than seven.a)(i) and (ii)b)(ii) and (iii)c)(i) and (iv)d)(iii) and (iv)Correct answer is option 'B'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed ?(i) It is an endothermic reaction.(ii) It is an exothermic reaction.(iii) The pH of the resulting solution will be more than seven.(iv)The pH of the resulting solution will be less than seven.a)(i) and (ii)b)(ii) and (iii)c)(i) and (iv)d)(iii) and (iv)Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed ?(i) It is an endothermic reaction.(ii) It is an exothermic reaction.(iii) The pH of the resulting solution will be more than seven.(iv)The pH of the resulting solution will be less than seven.a)(i) and (ii)b)(ii) and (iii)c)(i) and (iv)d)(iii) and (iv)Correct answer is option 'B'. Can you explain this answer?.
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