First use quantum theory to explain the structure of atom, The first use o...

The first use of quantum theory to explain the structure of atom was made by: (1)  Heisenberg (2 )Bohr (3) Planck (4) Einstein Ans: Bohr

The electronic configuration, The electronic configuration  1s 2 , 2s 2 , 2...

The electronic configuration  1s 2 , 2s 2 , 2p 1 x , 2p 1 z : (1) Oxygen           (2) Nitrogen          (3) Hydrogen     (4) Fluorine Ans: Nitrogen

Number of electrons in its outermost as well as penultimate, Which among th...

Which among the following species have the same number of electrons in its outermost as well as penultimate shell: (1) Mg 2+                               (2) O 2-

Atomic absorption troublshouting, Dear sir, We need your consultancy in a t...

Dear sir, We need your consultancy in a technical problem that we are confronting, and we would really appreciate your help We are in the process of implementing the heavy metal an

Determine atom containing protons, The charge on the atom containing 17 p...

The charge on the atom containing 17 protons, 18 neutrons and 18 electrons is: (1) +1                    (2) -2      (3) -1                     (4)Zero Ans: -1

How is aniline obtained from benzene, (a) How is aniline obtained from benz...

(a) How is aniline obtained from benzene? (b) Why are the secondary amines more basic than primary amines? Describe. (c) Write the complete chemical reactions for the convers

Equivalent mass, x gram of metal reacts with chlorine to form y gram of met...

x gram of metal reacts with chlorine to form y gram of metal chloride.calculate equivalent mass of metal.

How could lipids and proteins form lipoproteins, How could lipids and prote...

How could lipids and proteins form lipoproteins, stable superstructures which can be simply transported in blood? How would    a) cholesterol       b) esters of cholester

Explain the potential health risk, Question: (a) Explain the potential ...

Question: (a) Explain the potential health risk which composting will pose to workers or to those located near a facility. (b) A number of concerns have been shown in regar

Ionic bond,