All the enthalpy changes are________________?
All the enthalpy changes are________________?
A. Negative
B. Positive
C. May or may not be A or B
D. none
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Which one of the following has the maximum number of isotopes ?
Which one of the following has the maximum number of isotopes ?A. oxygen
B. carbon
C. tin
D. chlorineDeuterium reacts with oxygen to form________________?
Deuterium reacts with oxygen to form________________?A. Hard water
B. Heavy water
C. Soft water
D. Water gasChemical used in salt bridge is________________?
Chemical used in salt bridge is________________?A. KOH
B. KCI
C. KNO3
D. KBrWhich one is false for evaporation ?
Which one is false for evaporation ?A. Surface phenomenon
B. Continuous
C. Exothermic
D. Cause coolingWhich one of the following alkali metals forms only normal oxide when it reacts with O2 ?
Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?A. Lithium
B. Sodium
C. Potassium
D. RubidiumIncomplete oxidation of methane in the limited supply of air forms ?
Incomplete oxidation of methane in the limited supply of air forms ?A. CO2 and H2O
B. CH3OH
C. CO + H2 + C
D. CO + H2O + C