(A) Calcium
(B) Sodium
(C) Iron
(D) Magnesium
Tag: Biochemistry
Formation of water from hydrogen and oxygen is called which type of reaction?
(A) Redox chemical reaction
(B) Acid-Base chemical reaction
(C) Neutralization
(D) None of the above
Spontaneous chemical reaction takes place in?
(A) Electrolytic cell
(B) Galvanic cell
(C) Nelson cell
(D) Downs cell
Solution contains more water?
(A) 0.5 M
(B) 1 M
(C) 2 M
(D) 0.25 M
Triple covalent bond involves ___ electrons.
(A) 2
(B) 4
(C) 5
(D) 6
Long form of periodic table is based upon?
(A) Mendeleeve’s postulates
(B) Atomic mass
(C) Mass number
(D) Atomic number
Who discovered Neutron?
(A) Chadwick
(B) J.J. Thomson
(C) Rutherford
(D) None of the above
What is the most abundant element occuring in the ocean?
(A) Oxygen
(B) Hydrogen
(C) Nitrogen
(D) Silicon