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0 [{"id":34721,"quiz_id":"3113","answer_id":null,"answerType_id":"0","created_at":"2016-02-20 08:57:38","updated_at":"2016-02-20 08:57:38","questionName":"The formula of blue copper (II) sulphate is _____ .","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":34728,"quiz_id":"3113","answer_id":null,"answerType_id":"0","created_at":"2016-02-20 08:59:27","updated_at":"2016-02-20 08:59:27","questionName":" Dinitrogen oxide is used as anesthetic for minor operation and is given the name _____ gas.","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":34714,"quiz_id":"3113","answer_id":null,"answerType_id":"0","created_at":"2016-02-20 08:54:20","updated_at":"2016-02-20 08:54:20","questionName":"Reactive metals are usually manufactured by _____ .","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":34730,"quiz_id":"3113","answer_id":null,"answerType_id":"0","created_at":"2016-02-20 09:00:23","updated_at":"2016-02-20 09:00:23","questionName":"Nitric acid can be prepared by heating potassium nitrate crystals with concentrated _____ .","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":34725,"quiz_id":"3113","answer_id":null,"answerType_id":"0","created_at":"2016-02-20 08:58:43","updated_at":"2016-02-20 08:58:43","questionName":"A mixture of calcium cyanamide and carbon is known as _____ 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used.","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":34722,"quiz_id":"3113","answer_id":null,"answerType_id":"0","created_at":"2016-02-20 08:57:54","updated_at":"2016-02-20 08:57:54","questionName":"The elements above _____ in the electrochemical series can displace hydrogen from the acids.","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":34712,"quiz_id":"3113","answer_id":null,"answerType_id":"0","created_at":"2016-02-20 08:53:31","updated_at":"2016-02-20 08:53:31","questionName":"Sodium hydroxide is commercially produced from saturated solution of _____ by using 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_______.","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":34724,"quiz_id":"3113","answer_id":null,"answerType_id":"0","created_at":"2016-02-20 08:58:12","updated_at":"2016-02-20 08:58:12","questionName":"Ammonia gas has a characteristic _____ smell.","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":34720,"quiz_id":"3113","answer_id":null,"answerType_id":"0","created_at":"2016-02-20 08:57:03","updated_at":"2016-02-20 08:57:03","questionName":"In electrolytic refining crude copper is attached to _____ .","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null}]
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The formula of blue copper (II) sulphate is _____ .

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