When the trioxonitrate (IV) salt of an alkali metal Y is heated, the formula of the residue is Posted on:
Which of the following will not affect the degree of hardness in a sample of temporarily hard water? Posted on:
The component of air that removed when air is bubbled into alkaline pyrogallol solution is Posted on:
Which of the following indicates the correct increasing order of oxidizing power of the halogens? Posted on:
What volume of distilled water should be added to 400cm3 of 2.0 mole dm-3 H2SO4 to obtain 0.20 mole dm-3 of solution Posted on:
