1 ) An electrochemical cell consists of . . . . . . . half cells .
A ) two , B ) three ,
C ) four , D ) None of these ,
Correct Answer : - A ) two ,
And each half cell consists of an electrode and an electrolyte .
2 ) CaCl2 is added to NaCl in Down's cell to decrease the . . . . . . . . . . . . ,
A ) melting point , B ) boiling point .
C ) freezing point . D ) None of these ,
Correct Answer : - A ) melting point ,
3 ) Acetone is weakly polar . The attraction between acetone and ion will be weak . And NaCL has strong bonds , will not dissolve in acetone .
4 ) The main product of reaction of potassium with oxygen is : - KO2 .
5 ) The chemical formula for magnesite is : - MgCO3 .
6 ) Catalyst helps in a reaction by increasing rate of reaction .
7 ) Ionization energy of sodium is 496 k J / mole .
8 ) SnCl4 is a covalent compound .
9 ) Hydrides can be classified in . . . . . . . . . . ,
A ) 2 types . B ) 3 types ,
C ) 4 types . D ) none of these ,
Correct Answer : - B ) 3 types ,
10 ) Alkane and alkynes are unsaturated hydro carbons with at least one double bond ( pi - bond ) . Where as alkane contains only sigma bond . And sigma bond is stronger than pi bond . So , alkane is less reactive than alkyne and alkenes .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0 Comments