A solution has pH = 0 its H+ ion concentration is__________________?
A solution has pH = 0 its H+ ion concentration is__________________?
A. 1 x 10-1
B. 1 x 10-14
C. 1 x 10-7
D. 1
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Planks theory says energy is emitted__________________?
Planks theory says energy is emitted__________________?A. In continuous manner
B. Discontinuous manner
C. Simultaneously
D. In the form of heatFluorine can react with_________________?
Fluorine can react with_________________?A. Xe
B. Kr
C. Rn
D. All of the aboveElements which emit natural radioactivity are known as __________ ?
Elements which emit natural radioactivity are known as __________ ?A. Radio elements
B. Active elements
C. Radioactive elements
D. Nuclear elementsEqual masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?
Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?A. one / seventeen
B. sixteen / seventeen
C. one / three
D. two / threeThe cooling of molten urea by air in the tower is called______________________?
The cooling of molten urea by air in the tower is called______________________?A. prilling
B. evaporation
C. condensation
D. crystallizationRaney nickel is prepared from ______________________ by treating with caustic soda?
Raney nickel is prepared from ______________________ by treating with caustic soda?A. Ni-Cu alloy
B. Ni-Fe alloy
C. Ni-Al alloy
D. Ni-Mg alloy