Chemistry - General Knowledge Questions and Answers

1.	Which of the following forms a colour less solution in aqueous medium? (A) Ti 3+   (B) Sc 3+ (C) V 3+ (D) Cr 3+	Answer: (B)
2.	Which of the following has the maximum number of unpaired  'd' electrons? (A) Zn2+ (B) Fe2+ (C) Ni3+ (D) Cu+	Answer: (B)
3.	Which of the following has the minimum bond length? (A) O2 (B) (C)  (D)	Answer: (B)
4.	Which of the following is an intensive property? (A) temperature (B) surface tension (C) viscosity (D) all of these	Answer: (D)
5.	Which of the following is correct option for free expansion of an ideal gas under adiabatic condition? (A) q = 0, DT < 0, w ¹ 0 (B) q = 0, DT ¹ 0, w = 0 (C) q ¹ 0, DT = 0, w = 0 (D) q = 0, DT = 0, w = 0	Answer: (D)
6.	Which of the following is least likely to behave is Lewis base? (A) OH– (B) H2O (C) NH3 (D) BF3	Answer: (D)
7.	Which of the following organic compounds answers to both iodoform test and Fehling's test'? (A) ethanol (B) methanal (C) ethanal (D) propanone	Answer: (C)
8.	Which of the following pairs of metals is purified by van Arkel method? (A) Ni and Fe (B) Ga and In (C) Zr and Ti (D) Ag and Au	Answer: (C)
9.	Which one of the following is present as an active ingredient in bleaching powder for bleaching action? (A) CaCl2 (B) CaOCl2 (C) Ca(OCl)2 (D) CaO2Cl	Answer: (C)
10.	Which of the following species does not exert a resonance effect? (A) C6H5NH2 (B) C6H5NH3 (C) C6H5OH (D) C6H5Cl	Answer: (B)