1. Give the significance of lattice point. 2. Explain how much portion of an atom located at (i) corner and (ii) body-centre of a cubic unit...

1. How does NaCN acts as a depressant in preventing ZnS from forming the froath ? 2. How will you separate Galena(Pbs) from sphalerite (ZnS)...

1. What are the objectives for separating the Constituents of a mixture? 2. Name the process to be used in separating an insoluble solid fro...

Give two examples each of strong acids and strong bases. Name three acids obtained from natural sources. A student dropped a few pieces of m...

What is meant by solute, solvent and solution ? Are the solutions homogeneous or heterogeneous ? What is meant by an unsaturated solut...

Ques 1. Powder sugar dissolves faster than crystalline sugar. Why? Ques 2. It takes more time to cook rice at higher altitudes. Explain. Que...

Ques 1. Calculate the standard EMF of a cell which involves the following cell reaction:                  $\ce{ Zn + 2 Ag^+ -> Zn^{2+}...

What is evaporation? Give one example of evaporation. On what factors the process of evaporation depend? Why doesevaporation cause cool...