A Level Chemistry flashcards 0.0 / 5 ? ChemistryAllA2/A-levelCIE Created by: stanfuturemdCreated on: 19-01-20 13:41 What type of reaction are disulfide bond formation? oxidation 1 of 15 What does the D2O shake do? It removes the signal of NH and OH- groups 2 of 15 What type of bonds make up the bonds in a sugar phosphate group in DNA? Covalent bonds 3 of 15 What does HNO2 and HCl do to an NH2 group? It converts it into an NH2 into a Diazonium group (N Triple bond N-Cl) 4 of 15 Reaction conditions and reagents for the nitration of benzene Concentrated HNO3 and H2SO4 at 50 degrees celsius 5 of 15 Difference between addition and condensation polymers Both of them need small monomers, but condensation polymer also releases another small molecule 6 of 15 Does free radical chlorine substitute in an aromatic carbon in the ring or the sidechain? Sidechain 7 of 15 What is the bond angle of benzene? 120 degrees 8 of 15 What is the hybridization of the carbons in benzene? sp2 9 of 15 If an organic molecule is water soluble but not in organic solvents, what should you conclude? It's an ionic organic salt with polarity. 10 of 15 What happens when SiCl4 is added to water and what would the pH of the water be later? Fumes of HCl are seen and a white ppt of SiO2 is formed. the resulting solution has a pH or 0-3 11 of 15 Why is the standard enthalpy change of hydration of smaller ions more exothermic than larger ones? If charge density increases, the attraction to water increases, hence enthalpy change of hydration changes. 12 of 15 What is required of a molecule to act as a ligand? Lone pairs of electrons to form coordinate (dative covalent) bonds with the central atom 13 of 15 What does a Large E value of a reaction signify? It signifies that the reaction is reducing. Larger E value shows that the reaction is more feasible in that direction. 14 of 15 In the anti clockwise rule, what does the arrow's start and arrow's end signify? Arrow start - reactants and arrow end - product 15 of 15
Comments
No comments have yet been made