Chemistry Objective Type Questions With Answers

1.	Benzaldehyde and acetone can be best distinguished using ______. (A) sodium hydroxide solution (B) Fehling's solution (C) Tollens' reagent (D) 2, 4-DNPH	Answer: (C)
2.	Benzene reacts with chlorine in sunlight to give a final product (A) C₆H₅Cl (B) C₆Cl₆ (C) C₆H₆Cl₆ (D) CCl₄	Answer: (C)
3.	By what factors does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled? (A) 1.4 (B) 2.0 (C) 2.8 (D) 4.0	Answer: (A)
4.	Carbon can reduce ferric oxide to iron at a temperature above 983 K because ______. (A) carbon has a higher affinity towards oxidation than iron. (B) carbon monoxide formed is thermodynamically less stable than ferric oxide. (C) iron has a higher affinity towards oxygen than carbon. (D) free energy change for the formation of carbon dioxide is less negative than that for ferric oxide.	Answer: (A)
5.	Carbon forms two oxides which have different compositions. The equivalent mass of which remains constant? (A) carbon (B) oxygen (C) neither carbon nor oxygen (D) both carbon and oxygen	Answer: (B)
6.	Catalytic dehydrogenation of a primary alcohol gives a (A) secondary alcohol (B) aldehyde (C) ketone (D) ester	Answer: (B)
7.	CH₃CH₂Br A B C C D; "D" is _____. (A) CH₃CONH₂ (B) CH₃Br (C) CHBr₃ (D) CH₃NH₂	Answer: (D)
8.	CH₃COOH ln the above reaction Z is (A) Ketol (B) Acetal (C) Butanol (D) Aldol	Answer: (D)
9.	Chloroacetic acid is a stronger acid than acetic acid. This can be explained using ______. (A) - I effect (B) - M effect (C) +I effect (D) + M effect	Answer: (A)
10.	Clemmensen reduction of a ketone is carried out in the presence of which of the following? (A) H₂and Pt as catalyst (B) Glycol with KOH (C) Zn-Hg with HCl (D) LiAlH₄	Answer: (C)
11.	0.023 g of sodium metal is reacted with 100 cm3 of water. The pH of the resulting solution is ______. (A) 8 (B) 10 (C) 12 (D) 9	Answer: (C)
12.	2 gm of metal carbonate is neutralized completely by 100 ml of 0.1 (N) HCI. The equivalent weight of metal carbonate is (A) 50 (B) 100 (C) 150 (D) 200	Answer: (D)
13.	25 g of each of the following gasses are taken at 27^oC and 600 mm pressure. Which of these will have the least volume? (A) HCl (B) HBr (C) HI (D) HF	Answer: (C)
14.	4 moles each of SO₂ and O₂ gases are allowed to react to form SO₃ in a closed vessel. At equilibrium 25% of O₂ is used up. The total number of moles of all the gases present at equilibrium is (A) 6.5 (B) 7.0 (C) 8.0 (D) 2.0	Answer: (B)
15.	A distinctive and characteristic functional group of fats is (A) a peptide group (B) an ester group (C) an alcoholic group (D) a ketonic group	Answer: (B)