If the enthalpy change for the transition of liquid water to steam is 30 kJ mol–1 at 27°C, the entropy change for the process would be 100 J mol–1 K–1

226.    If the enthalpy change for the transition of liquid water to steam is 30 kJ mol–1 at 27°C, the entropy change for the process would be

(A) 100 J mol–1 K–1

(B) 10 J mol–1 K–1

(C) 1.0 J mol–1 K–1

(D) 0.1 J mol–1 K–1

Answer:: (A)

227.    If x is amount of adsorbate and m is amount of adsorbent, which of the following relations is not related to adsorption process?

(A) = P ´ T

(B)  =f(p) at constant T

(C)  = f(T) at constant p

(D) p = f(T) at constant

Answer:: (A)

228.    In acetylene molecule, between the carbon atoms there are

(A) three sigma bonds

(B) two sigma and one pi bonds

(C) one sigma and two pi bonds

(D) three pi bonds

Answer:: (C)

229.    In alkaline medium, alanine exists predominantly as/in ______.

(A) zwitterion

(B) anion

(C) covalent form

(D) cation

Answer:: (B)

230.    In chromite ore, the oxidation number of iron and chromium are respectively ______.

(A) +3, +6

(B) +3, +2

(C) +2, +3

(D) +2, +6

Answer:: (C)