An element 'A' reacts with oxygen to form an oxide of the formula `A_2O` which dissolves in dil. HCl. The oxide formed turns red litmus paper blue.
Is the element a metal or a non-metal?

An element 'A' reacts with oxygen to form an oxide of the formula A_2O which dissolves in dil. HCl. The oxide formed turns red litmus paper blue. Write the formula of A_2O and its reaction with dil. HCl.

An element x reacts with oxide to from oxide, X_2O which dissolves in water and turns red litmus solution blue, give the nature of oxide and indicate X is metal or non-metal.

An element M forms an oxide M_2O_3 . Which is acidic in nature. State whether the element M is a metal or a non-metal.

An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide C which on treatment with watr gives back B. identify A, B and C and give the reacitons involved.

Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements: K and O_2 ?

Element 'X' forms a chloride with the formula XCl_2 Which is a solid with a high melting point, X would most likely be in the same group of the periodic table as: Na, Mg, Al, Si,

An aqueous solution of metal ion M_1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M_2 always forms tetrahedral complexes with these reagents. Aqueous solution of M_2 on reaction with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarized in the scheme given below : M1, Q and R , respectively are :

An element, A from two oxides AO and AO_2 AO is neutral and AO_2 is acidic: indicate whether A is metal or non-metal