(A) Robert Brown
(B) Schwann
(C) Lorenz
(D) Rudolph Virchow
What is the percentage of nitrogen in urea?
(A) 35%
(B) 42%
(C) 46%
(D) 55%
Chemical formula based on actual number of molecules is called?
(A) Simples formula
(B) Molecular formula
(C) Empirical formula
(D) Structure formula
Number of protons are equal to the number of __ in a neutral atom.
(A) Nucleons
(B) Electrons
(C) Photons
(D) None of the above
Who introduced the concept of atom with central necleus?
(A) Louis De Broglie
(B) Crooks
(C) Bohr
(D) Rutherford
Since its discovery in which year will pluto complete one orbit?
(A) 2175
(B) 1930
(C) 2178
(D) 2345
Inclination of earth axis to plane of the orbit is?
(A) 00
(B) 800
(C) 900
(D) 23.50
Planet which has longest year?
(A) Neptune
(B) Venus
(C) Earth
(D) Mercury