The branch of study dealing with old age and aging is known as _.
(A) Gerontology
(B) Teratology
(C) Oncology
(D) Ornithology
Who suggested that most of the mass of the atom is located in the nucleus?
(A) Chadwick
(B) Dalton
(C) Thompson
(D) Rutherford
The gas usually filled in the electric bulb is.
(A)
(B)
(C)
(D)
The atoms of Germanium, Arsenic, Selenium and Bromine contain _____ shells.
(A) 4
(B) 3
(C) 5
(D) 7
Give an example of a slat which gives an aqueous solution of pH less than 7.
(A) Sodium chloride
(B) Ammonium chloride
(C) Sodium carbonate
(D) Sodium bicarbonate
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