In which of the following type of reactions energy of reactant is greater than energy of product________________?
A. endothermic
B. exothermic
C. unpredictable
D. same
Chemistry Basic Concept
At which electrode the reduction of the solution is occurring in Al-Ag cell_____________?
At which electrode the reduction of the solution is occurring in Al-Ag cell_____________?
A. A
B. Ag
C. Both
D. Neither
The use of antifreeze in the automobile radiator is an important application of__________________?
The use of antifreeze in the automobile radiator is an important application of__________________?
A. constitutive property
B. additive property
C. colligative property
D. intrinsic property
1 mole of electron has mass in microgram_________________?
1 mole of electron has mass in microgram_________________?
A. 1.008 x 10-3
B. 5.5 x 10-4
C. 1.84 x 10-4
D. 1.673 x 10-3
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
Which of the following is not characteristics of reversible reaction__________________?
Which of the following is not characteristics of reversible reaction__________________?
A. whole amount of reactant does not change into product
B. chemical equilibrium is established
C. a catalyst changes the direction of reaction
D. rate of forward reaction decreases as reaction proceeds
Which of the following theories is superior to others__________________?
Which of the following theories is superior to others__________________?
A. VSEPR
B. VBT
C. MOT
D. none of the above
The balanced chemical equation for the reaction which occurs when Be is added to water is____________?
The balanced chemical equation for the reaction which occurs when Be is added to water is____________?
A. Be+2H2O?Be (OH)2+H2
B. Be+H2O?Be (OH)2+H2
C. Be+H2O?[Be (OH)4]+2+H2
D. no reaction
Which of the solid does not contain covalent bond__________________?
Which of the solid does not contain covalent bond__________________?
A. copper
B. ice
C. diamond
D. graphite
The hardest of the following solids is__________________?
The hardest of the following solids is__________________?
A. sodium
B. diamond
C. graphite
D. magnesium