When the trioxonitrate (IV) salt of an alkali metal Y is heated, the formula of…
When the trioxonitrate (IV) salt of an alkali metal Y is heated, the formula of the residue is…
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The component of air that removed when air is bubbled into alkaline pyrogallol solution is
The component of air that removed when air is bubbled into alkaline pyrogallol solution is A. carbon(lV) oxide…
Which of the following will not affect the degree of hardness in a sample of…
Which of the following will not affect the degree of hardness in a sample of temporarily hard water?…
Which of the following indicates the correct increasing order of oxidizing power of the halogens?
Which of the following indicates the correct increasing order of oxidizing power of the halogens? A. F B.…
Which of the following substances is a peroxide?
Which of the following substances is a peroxide? A. Na2O2 B. CuO C. PbO4 D. Fe2O E. AI2O…
The following gases decolorize bromine water except
The following gases decolorize bromine water except A. C2H6 B. C2H4 C. C2H2 D. C3H4 E. C3H6 Correct…
What volume of distilled water should be added to 400cm3 of 2.0 mole dm-3 (H_{2}SO_{4})…
What volume of distilled water should be added to 400cm3 of 2.0 mole dm-3 (H_{2}SO_{4}) to obtain 0.20…
Which of the following pieces of deposited if a current of 10A was passed through…
Which of the following pieces of deposited if a current of 10A was passed through a solution of…
Chlorine is is used in water treatment as
Chlorine is is used in water treatment as A. a germicide B. a decolorizing agent C. an antioxidant…
Some precious stones such as ruby and sapphire consist of aluminum oxide coloured by traces…
Some precious stones such as ruby and sapphire consist of aluminum oxide coloured by traces of the oxides…