The non-metal which is liquid at room temperature is:
Bromine is the only non-metal which exists as a liquid at room temperature.
The number of protons in an atom of an element A is 19 then, the number of electron in its ion A+ is:
In the neutral atom of an element,
Bauxite is an ore of
Bauxite is a commercial ore of aluminium which consists largely of hydrated aluminium oxide, Al2O3.2H2O.
The sulphide ores are converted into oxides by heating strongly in the presence of excess air. This process is known as
The process of heating the sulphide ore strongly in the presence of air to convert it into metal oxide, is known as roasting.
In electrolytic refining, the cathode is made up of
In electrolytic refining of a metal, the cathode is made up of pure metal whereas the anode is made up of impure metal.
In the given reaction, Al2O3 + NaOH → ……X…… + H2O
What is element X?
Aluminium oxide is amphoteric in nature, i.e., it reacts with acids as well as bases to form salt and water.
Which of the following represent the correct order of decreasing reactivity?
The decreasing order of the reactivity of the common metals is given below:
Li, K, Na, Ba, Ca, Mg , Al, Mn, Zn, Fe, Ni, Sn, Pb, [H], Cu,Hg, Ag, Au,Pt
The electronic configuration of three elements X, Y and Z are as follows:
X = 2, 4, Y = 2, 7, Z = 2,1 Which two elements will combine to form an ionic compound and write the correct formula,
Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
Z is an ionic compound. It has a high melting point.
Which of the statements about the reaction,
ZnO + CO → Zn + CO2 is correct ?