31 - 40 of 47 Questions
# | Question | Ans |
---|---|---|
31. |
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into A. CH3CH2CH2CH3 B. CH2 = CH - CH2CH3 C. HC≡CH D. CH3 - C = C - CH3 Detailed SolutionWhen ethyne is passed through an ammoniacal solution of copper(I) chloride, a red-brown precipitate of copper(I) acetylide is produced. Terminal alkynes also react to form a red-brown precipitate |
|
32. |
The boiling of fat and aqueous caustic soda is referred to as A. hydrolysis B. esterification C. acidification D. saponification |
D |
33. |
The most important use of hydrogen is in the A. manufacture of ammonia B. manufacture of methyl alcohol C. manufacture of ethyl alcohol D. hydrogenation of oils |
A |
34. |
Which of the following polymers is suitable for packaging and electrical insulation? A. polyamide B. polyethene C. polycarbonate D. polystyrene |
D |
35. |
Hydrogen is readily released when dilute hydrochloric acid reacts with A. Cu B. Na C. Au D. Ag |
B |
36. |
The intermediate product formed when ethanol is progressively oxidized to ethanoic acid with potassium heptaoxodichromate (IV) is A. butanal B. ethanal C. methanal D. propanal |
B |
37. |
A rock sample was added to cold dilute HNO3. The gas evolved was passed into a solution of acidified K2Cr2O7 and the solution turned green. The sample contains A. Cl- B. NO3- C. SO32- D. SO42- |
C |
38. |
Which of the following statement is true of a proton? A. The mass of a proton is 1840 times the mass of electron B. the total mass of the protons in a particular nucleus is always half the nuclear size C. The mass of a proton is one - twelfth the molar mass of carbon D. The mass of a proton is 1.0008g |
D |
39. |
Which of the following chloride would exhibit the least ionic character? A. MgCl2 B. CaCl2 C. LiCl D. AlCl3 |
D |
40. |
A fixed mass of gas has a volume of 92cm3 at 3 oC. When will be its volume at 18 oC if the pressure remains constant A. 15.3cm3 B. 87.3cm3 C. 552.0cm3 D. 97.0cm3 Detailed Solution(V1/T1) = (V2/T2)T1 = 3+273 = 276K ∴ (92/276) = (V2/291) T2 = 18 + 273 = 291K V2 (92 * 291)/276 = 97.0 cm3 |
31. |
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into A. CH3CH2CH2CH3 B. CH2 = CH - CH2CH3 C. HC≡CH D. CH3 - C = C - CH3 Detailed SolutionWhen ethyne is passed through an ammoniacal solution of copper(I) chloride, a red-brown precipitate of copper(I) acetylide is produced. Terminal alkynes also react to form a red-brown precipitate |
|
32. |
The boiling of fat and aqueous caustic soda is referred to as A. hydrolysis B. esterification C. acidification D. saponification |
D |
33. |
The most important use of hydrogen is in the A. manufacture of ammonia B. manufacture of methyl alcohol C. manufacture of ethyl alcohol D. hydrogenation of oils |
A |
34. |
Which of the following polymers is suitable for packaging and electrical insulation? A. polyamide B. polyethene C. polycarbonate D. polystyrene |
D |
35. |
Hydrogen is readily released when dilute hydrochloric acid reacts with A. Cu B. Na C. Au D. Ag |
B |
36. |
The intermediate product formed when ethanol is progressively oxidized to ethanoic acid with potassium heptaoxodichromate (IV) is A. butanal B. ethanal C. methanal D. propanal |
B |
37. |
A rock sample was added to cold dilute HNO3. The gas evolved was passed into a solution of acidified K2Cr2O7 and the solution turned green. The sample contains A. Cl- B. NO3- C. SO32- D. SO42- |
C |
38. |
Which of the following statement is true of a proton? A. The mass of a proton is 1840 times the mass of electron B. the total mass of the protons in a particular nucleus is always half the nuclear size C. The mass of a proton is one - twelfth the molar mass of carbon D. The mass of a proton is 1.0008g |
D |
39. |
Which of the following chloride would exhibit the least ionic character? A. MgCl2 B. CaCl2 C. LiCl D. AlCl3 |
D |
40. |
A fixed mass of gas has a volume of 92cm3 at 3 oC. When will be its volume at 18 oC if the pressure remains constant A. 15.3cm3 B. 87.3cm3 C. 552.0cm3 D. 97.0cm3 Detailed Solution(V1/T1) = (V2/T2)T1 = 3+273 = 276K ∴ (92/276) = (V2/291) T2 = 18 + 273 = 291K V2 (92 * 291)/276 = 97.0 cm3 |