Chemistry
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information complete the following:
(a) …………… is the metallic element.
(b) Metal atoms tend to have a maximum of …………… electrons in the outermost shell.
(c) …………… is the reducing agent.
Related Questions
State one observation in the following cases:
(a) Sodium chloride solution is added to a solution of lead nitrate.
(b) Barium chloride solution is added to a solution of Zinc sulphate.
Copper sulphate solution is electrolysed using copper electrodes.
(a) Which electrode [cathode or anode] is the oxidizing electrode? Why?
(b) Write the equation for the reaction occurring at the above electrode.
The empirical formula of an organic compound is C3H4N. Its molecular weight is 108. Find the amount of carbon in one mole of the compound. Show all the steps involved.
(Atomic weights: C- 12; H- 1; N- 14)
(a) Mahesh prepared a basic solution X that has a pH 7. How will the pH of the solution X change on addition of the following:
Hydrochloric acid
a solution of a base
(b) The atomic number of an element is 15. To which group will this element belong to?