The sun is containing _______ % mass of the solar system
(A) 75.24%
(B) 79.36%
(C) 89.10%
(D) 99.86%
Sun is moving around the centre of the galaxy at a velocity of _______ km/s
(A) 205
(B) 210
(C) 215
(D) 220
The horizontal rows of the periodic table are called ______
(A) Groups
(B) Periods
(C) Sets
(D) Matrices
Battery was invented by__________
(A) Nicolas Léonard Sadi Carnot
(B) Alessandro Volta
(C) Michael Faraday
(D) Friedrich Bessel
A loudspeaker changes _________ energy into sound energy
(A) Chemical
(B) Electrical
(C) Light
(D) Kinetic
The strongest part(s) of a magnet is/are _________
(A) North pole
(B) South pole
(C) North and south pole
(D) Median of north and south pole
The major ingredient of leather is__________________
(A) Collagen
(B) Polymer
(C) Nucleic acid
(D) None of these