The hardest of the following solids is__________________?

A. Sodium
B. Diamond
C. Graphite
D. Magnesium

Which of the solid does not contain covalent bond__________________?

A. Copper
B. Ice
C. Diamond
D. Graphite

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 following theories is superior to others__________________?

A. Vsepr
B. Vbt
C. Mot
D. None of the above

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

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

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

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

At which electrode the reduction of the solution is occurring in Al-Ag cell_____________?

A. A
B. Ag
C. Both
D. Neither

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