Polarizing power is highest for
(A)` Mg^(+2)`
(B) `Al^(+3)`
(C) `Na^(+)`
(D) `K^(+)`

Hardness of water is due to (a) Ca^(2+) and K^(+) (b) Mg^(2+) and K^(+) (c) Ca^(2+) and Mg^(2+) (d) Ba^(2+) and Zn^(2+)

Assertion : In the coagulation of a negative sol the flocculating power is in the order : Al^(3+) gt Ba^(2+) gt Na^(+) Reason : Greater the valence of the flocculating ion added, greater is its power to cause precipitation.

The set representing the correct order of ionic radius is : a) Na^(+) gt Mg^(2+) gt Al^(3+) gt Be^(2+) gt Li^(+) b) Na^(+) gt Li^(+) gt Mg^(2+) gt Al^(3+) gt Be^(2+) c) Na^(+) gt Mg^(2+) gt Al^(3+) gt Li^(+) gt Be^(2+) d) Na^(+) gt Mg^(2+) gt Li^(+) gt Be^(2+) gt Al^(3+)

The set representing the correct order of ionic radius is : a) Na^(+) gt Mg^(2+) gt Al^(3+) gt Be^(2+) gt Li^(+) b) Na^(+) gt Li^(+) gt Mg^(2+) gt Al^(3+) gt Be^(2+) c) Na^(+) gt Mg^(2+) gt Al^(3+) gt Li^(+) gt Be^(2+) d) Na^(+) gt Mg^(2+) gt Li^(+) gt Be^(2+) gt Al^(3+)

Which has the highest pH ? (a) NaCl (b) Na_(2)CO_(3) (c) NH_(4)Cl (d) NaNO_(3)

The coagulating power of electrolytes having inos Na^(o+),Al^(3+) and Ba^(2+) for arsenic sulphide sol increases in the order (a) Na^(o+)ltBa^(2+)ltAl^(3+) (b) Ba^(2+)ltNa^(o+)ltAl^(3+) (c) Al^(3+)ltNa^(o+)ltBa^(2+) (d) Al^(3+)ltBa^(2+)ltNa^(o+)

Find the highest power of 3 in ""^(50)C_(10) and ""^(50)P_(10)

The correct order of the ionic radii of O^(-2), N^(3-) , F^(-), Mg^(2+) , Na^(+) and Al^(3+) is .

A stone is thrown at an angle of 45^(@) to the horizontal with kinetic energy K. The kinetic energy at the highest point is - (a) (K)/(2) (b) (K)/(sqrt2) (c) K (d) zero

Which of the two cations Mg^(2+) and Al^(3+) is smaller?