Chemistry
(a) For each of the substances given below, what is the role played in the preparation of NH3 (ammonia)
(a) CaO
(b) Mo
Related Questions
Arrange the following as per the instructions given in the brackets.
(a) Al, Cl, Na, Si, Mg (increasing order of non-metallic character).
(b) C, F, Li, O, Be (decreasing order of metallic character)
(c) Mg, Al, Na, Si (increasing order of atomic size).
X [Oxygen, Sulphur, Selenium] and Y [Neon, Argon, Xenon] are two sets of elements. Using these elements complete the following.
(a) Set …………… is known as noble gases.
(b) In set X …………… has the highest electronegativity.
(c) The …………… set contains the non-metals.
Calculate:
(a) The mass of 12.044 x 1023 oxygen atoms.
(b) What is the vapour density of ethylene?
The following questions are asked with respect to the electrolytic process in the extraction of aluminium.
(a) Identify the components of the electrolyte other than pure alumina.
(b) Give the role played by these components.