(1) Dissociation of CaSO4(s) to CaO(s) and SO3(g) (2) Dissolution of iodine in water (3) Synthesis of ammonia from N2 and H2 (4) Sublimation of... View Article
1 mole = 6.022 x 1023 molecules Mass of 6.022 x 1023 atoms of silver (Ag) = 108 g Mass of one atom of Silver = 108/(6.022 x 1023) = 1.79 x 10-22g... View Article
(a) Good conductor(b) Insulator(c) Semiconductor(d) None of theseCorrect option: (a) Good conductorBy adding common salt to distilled water makes... View Article
Ammonium dichromate on heating gives chromium(III) oxide and nitrogen gas. This can be represented as: (NH4)2Cr2O7(s) → Cr2O3(s) + N2(g) + 4H2O(g)... View Article
Answer: Chemical equations are symbolic representations of chemical reactions in which the reactants and the products are expressed in terms of... View Article
(a) afforestation (b) removing top soil (c) deforestation (d)agricultureCorrect option: (a) afforestation Floods can be prevented by afforestation.... View Article
Let’s consider the oxidation number of C in C6H12O6 as xWe know that the oxidation of H is -1 and that of O is -2Also, the given formula is... View Article
Answer: 0.029 mol The atomic mass of PbO = 223 The number of moles in 6.5 g of PbO = 6.5/223 = 0.029 The atomic mass of HCl = 36.5 The number of... View Article
The coordination number of an atom in a given molecule or a crystal refers to the total number of atoms, ion, or molecules bonded to the atom in... View Article
Answer: Both (b) and (d) A precipitate of barium sulphate is obtained so it’s a precipitation reaction. Also, when two compounds react,... View Article
Answer: a) H3PO4 That’s because P-H bonds are not ionizable to give H+ whereas, the H atoms which are attached with oxygen in P-OH form... View Article
Fluorobenzene (C6H5F) can be synthesized in the laboratory from aniline by diazotisation followed by heating the diazonium salt with HBF4. The... View Article
The stability of lyophilic sols is due to the presence of a charge and the solvation of colloidal particles. On the other hand, the stability of... View Article
