What is the number of isotopes of hydrogen?
(A) 4
(B) 2
(C) 3
(D) 1
The mass number is the sum of the?
(A) Proton and Neutron
(B) Proton Only
(C) Electron and Proton
(D) Electron and Neutron
Which of the following is not a characteristic of transition metals?
(A) tendency to gain electrons
(B) low electronegativity
(C) low ionization energy
(D) tensile
A wooden swing is swinging in a sitting position, the time period of oscillations when the girl is standing?
(A) will decrease
(B) remain unchanged
(C) will be more
(D) none of these
Skating on ice shows that on increasing the pressure the melting point of ice
(A) decreases
(B) increases
(C) remains unchanged
(D) first decreases then increases
When the speed of a moving object is doubled, then its kinetic energy?
(A) doubles
(B) increases three times
(C) remains the same
(D) quadruples
The change in the kinetic energy of the object as the speed changes is proportional to the square of the factor by which the speed changes. If the speed of the object becomes double, its kinetic energy changes to four times the initial kinetic energy.
What are the cells of the pancreas, which produce insulin, called?
(A) Thymus
(B) Estrogen
(C) Corpus epididymis
(D) Islets of Langerhans
Who among the following started the work of 'Plant tissue culture'?
(A) F. C. Steward
(B) P. Maheshwari
(C) P.R. White
(D) Haberladdit
Which of the following organisms is not in accordance with the cell theory?
(A) Bacteria
(B) Virus
(C) Fungus
(D) Plants
Chlorophyll was first isolated and named by _?
(A) Ketu
(B) Pelletier
(C) Chlorophyll
(D) Kventu and Pelletier
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