An element Z has a combining power of 3. Which of the following formulae is correct of its compounds? Posted on:
The atoms of four elements are represented as 20Q, 16R, 10S and 8T Which of the elements would be unreactive? Posted on:
Given that the order of reactivity of four metals is P>Q>R>S, which of the following reactions is feasible? Posted on:
A concentrated solution containing H+, Cu2+,OH- and CI- was electrolysed using platiunm electrodes which of the ions will be discharged at the cathodes? Posted on:
Which of the following substances decomposes when an electric current is passed through it? Posted on:
What is oxidized in the reaction represented by the following equation? 3CU + 8HN O3 → 3Cu(NO3)2 + 2NO + 4H2O Posted on:
