Chemistry - Study Mode

[#231] The most electronegative element among the following is
Correct Answer

(C) fluorine
(E) Fluorine

Explanation

Solution: Fluorine is the most electronegative element and also the most reactive non-metal.

[#232] The metal used to recover copper from a solution of copper sulphate is
Correct Answer

(D) Fe

Explanation

Solution: The metal used to recover copper from a solution of copper sulphate is Fe.

[#233] The number of d-electrons in Fe 2+ (Z = 26) is not equal to that of
Correct Answer

(D) p -electrons in CI(Z = 17)

Explanation

Solution: The number of d-electrons in Fe 2+ (Z=26) is not equal to the number of p - electrons in Cl(Z=17).

[#234] The metallurgical process in which a metal is obtained in a fused state is called
Correct Answer

(A) smelting

Explanation

Solution: The process of extraction of metal in its molten state by any reducing agent in the presence of flux is called smelting.

[#235] The molecules of which gas have highest speed?
Correct Answer

(A) H 2 at -73 o C

Explanation

Solution: Among the given gases, hydrogen at −50 o C has maximum value of T/M and highest speed.