Which of the following compound has a tetrahedral shape?
(A) water
(B) Ammonia
(C) Acetylene
(D) carbon tetrachloride
What is the tendency to lose electrons called?
(A) Motivation
(B) Reduction
(C) Oxidation
(D) none of these
The number of isotopes of polonium is
(A) 202
(B) 25
(C) 27
(D) 24
The tendency to lose electrons called?
(A) Motivation
(B) Oxidation
(C) Reduction
(D) none of these
The photooxidation process is started by?
(A) by catalyst
(B) by light
(C) by heat
(D) by oxygen
Which scientist first discovered radioactivity?
(A) Henry Becquerel
(B) Irene Curie
(C) Madame Curie
(D) none of these
What is the unit of radioactivity?
(A) Fermi
(B) Curie
(C) Candela
(D) none of these
Who discovered X-rays?
(A) Faraday
(B) Newton
(C) Rutherford
(D) none of these
Isobars are formed by the emission of which of the following?
(A) X rays
(B) gamma ray
(C) beta ray
(D) alpha ray
What type of charge does β-rays carry?
(A) negative
(B) positive
(C) zero charge
(D) none of these
Get the Examsbook Prep App Today