Chemistry Quizzes - Quiz about chemistry topics

1.	Presence of halogen in organic compounds can be detected using (A) Beilstien's test (B) kjeldahl test (C) Duma's test (D) Leibig's test	Answer: (A)
2.	Rate of physical adsorption increases with (A) decrease in pressure (B) increase in temperature (C) decrease in surface area (D) decrease in temperature	Answer: (D)
3.	Reaction of methyl bromide with aqueous sodium hydroxide involves ______. (A) SN 1 mechanism (B) racemisation (C) SN2 mechanism (D) inversion of configuration	Answer: (C)
4.	Standard electrode potential for Sn4+ / Sn2+ couple is +0.15 V and that for the Cr3+ / Cr couple is –0.74 V. These two couples in their standard state are connected to make a cell. The cell potential will be (A) +1.83 V (B) +1.19 V (C) +0.89 V (D) +0.18 V	Answer: (C)
5.	Standard electrode potential of three metals X, Y and Z are –1.2 V, +0.5 V and –3.0 V respectively. The reducing power of these metals will be (A) X > Y > Z (B) Y > Z > X (C) Y > X > Z (D) Z > X > Y	Answer: (D)
6.	The activation energy for a reaction at the temperature TK was found to be 2.303 RT J mol-1. The ratio of the rate constant to Arrhenius factor is ______. (A) 10-2 (B) 10-1 (C) 2´10-2 (D) 2´10-3	Answer: (B)
7.	The amino acid which is not optically active is (A) glycine (B) alanine (C) serine (D) lactic acid	Answer: (A)
8.	The amount of heat evolved when 500 cm3 of 0.1 M HCI is mixed with 200 cm3 of 0.2 M NaOH is ______. (A) 1.292 kJ (B) 2.292 kJ (C) 3.392 kJ (D) 0.292 kJ	Answer: (B)
9.	The angle strain in cyclobutane is (A) 24°44' (B) 29°16' (C) 19°22' (D) 9°44'	Answer: (D)
10.	The basic principle of Cottnell's precipitator is (A) Le-chatelier's principle (B) peptisation (C) neutralisation of charge on colloidal particles (D) scattering of light	Answer: (C)