Chemical Process Presence of carbonaceous matter in the sewage Reduces sulphate ions to sulphides causing obnoxious smell Increases the quantity of chlorine used for its purification Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures All of these Reduces sulphate ions to sulphides causing obnoxious smell Increases the quantity of chlorine used for its purification Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures All of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Process Iron ore hametite is concentrated using Gravity separation Roasting Electro magnetic separation mainly Froth floatation Gravity separation Roasting Electro magnetic separation mainly Froth floatation ANSWER DOWNLOAD EXAMIANS APP
Chemical Process Blue colour is imparted to glass by the addition of PbO CaO FeSO₄ NaOH PbO CaO FeSO₄ NaOH ANSWER DOWNLOAD EXAMIANS APP
Chemical Process The product obtained on mixing calcium oxide with water is called Slaked lime Quicklime Milk of lime None of these Slaked lime Quicklime Milk of lime None of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Process Chemical formula of oleum is H₂SO₇ H₂SO₄ H₂SO₃ H₂S₂O₇ H₂SO₇ H₂SO₄ H₂SO₃ H₂S₂O₇ ANSWER DOWNLOAD EXAMIANS APP
Chemical Process Cellulose percentage in bamboo fibre is about 20 50 10 85 20 50 10 85 ANSWER DOWNLOAD EXAMIANS APP
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