Concepts of Chemistry
- 3:32
- 14 күн бұрын
Carbon prefers to share its valence electrons with other atoms of carbon or with atoms of other
- 5:16
- 14 күн бұрын
Q52. A 0.5% aqueous solution of KCl was found to freeze at 272.76 K. Calculate the van’t Hoff factor
- 4:08
- 21 күн бұрын
Q51. A solution containing 1.23 g of Ca(NO3 )2 in 10 g of water boils at 100975C. Calculate the de
- 3:41
- 21 күн бұрын
Q50. Calculate the Kb for chloroform from the following data: (a) Boiling point of pure CHCl₃ = 61.3
- 2:06
- 21 күн бұрын
Q49. Kb for CCl₄ is 5.02. The boiling point of pure CCl₄ is 76.8 °C. Calculate the boiling point of
- 1:21
- 21 күн бұрын
Q48. Calculate the molal depression constant of water. Latent heat of fusion of ice at 0° is 80
- 2:09
- 21 күн бұрын
Q47. Molal elevation constant of chloroform is 3.88. 0.3 g of camphor added to 25.2 g of chloroform
- 1:19
- 21 күн бұрын
Q46. Calculate Kb of water when 1 mole of the solute is dissolved in 1000g of water. The latent heat
- 3:59
- 21 күн бұрын
Q45. When 45 g of glucose was dissolved in 500 g of water, the solution has a freezing point of
- 5:47
- 28 күн бұрын
Q44. Two elements ‘A’ and ‘B’ form compounds having formulae AB2 and AB4 . When dissolved in 20 g of
- 3:00
- 28 күн бұрын
Q43.1.23 g of a substance dissolved in 10 g of water raised the boiling point of water to 100.39°C.
- 2:49
- Ай бұрын
Q42. 0.1 g of an unknown substance was dissolved in 5 g of camphor and it was found that the melting
- 3:37
- Ай бұрын
Q41. At 25°C a solution containing 0.2 g of polyisobutylene in 100 cc of benzene, developed a rise
- 4:25
- Ай бұрын
Q40. What approximate proportions by volume of water (d = 1 g/cc) and ethylene glycol C₂H6O₂ (d =
- 2:45
- Ай бұрын
Q38. If glycerene, C₃H₅(OH)₃ , and methyl alcohol, CH₃OH, are sold at the same priceper kg, which
- 3:59
- Ай бұрын
Q39. How much ice will separate if a solution containing 25 g of ethylene glycol [C2H4(OH)2] in 100
- 4:32
- Ай бұрын
Q37. An aqueous solution contains 10% by weight of urea (60.00) and 5% by weight of glucose (180.00)
- 2:40
- Ай бұрын
Q36. What weight of glycerol would have to be added to 1000 g of water in order to lower its freezin
- 2:15
- Ай бұрын
Q 35. What is the freezing point of a solution containing 6.84 g of sucrose per 500 g of water? Kf
- 1:41
- Ай бұрын
Q34. The osmotic pressure of an aqueous solution containing 45 g of sucrose (343) per litre of solut
- 3:04
- Ай бұрын
Q33. A solution containing 10.2 g of glycerene per litre is found to be isotonic with a 2% solution
- 2:55
- Ай бұрын
Q32. The average osmotic pressure of human blood is 7.7 atm at 40°C .(a) What should be the total
- 4:05
- Ай бұрын
Q31. 10.1 g of a volatile liquid occupies a volume of 4 litres when vaporised at 100 C and 70 cm pre
- 1:33
- Ай бұрын
Q30. What is the osmotic pressure of a solution of 4.48 g of a substance of molecular weight 286 in
- 6:00
- Ай бұрын
Пікірлер