Soda lime is a mixture of
(A) NaOH + CaCO3
(B) NaOH + CaO
(C) NaOH + HOH
(D) None of these
The basis of classification of elements in modern periodic table is based on___.
(A) Atomic number
(B) Atomic mass
(C) Atomic volume
(D) Atomic density
Horizontal columns are called in the Periodic table.
(A) Periodic
(B) Class
(C) Electrical chemical sequence
(D) Non-metal
The halogen used as an analgesic is-
(A) Chlorine
(B) Bromine
(C) Iodine
(D) Fluorine
Which of the following is not nucleon?
(A) Proton
(B) Neutron
(C) Both (A) and (B)
(D) Positron
'Every substance in the world is made up of very fine particles.' Who said this first?
(A) Dalton
(B) Kanad
(C) Rutherford
(D) Avogadro
Get the Examsbook Prep App Today