Chemistry

12.3. Write bond-line formulas for: Isopropyl alcohol, 2,3-Dimethylbutanal, Heptan-4-one.

12.1. What are hybridisation states of each carbon atom in the following compounds? CH₂=C=O, CH₃CH=CH₂, (CH₃)₂CO, CH₂=CHCN, C₆H₆.

11.4 The state of hybridisation of B in BH₄ is

(a) sp (b) sp² (c)sp³ (d) None

11.3. Assertion: PbI₄ does not exist.

Reason: Pb—I bond initially formedduring the reaction does not release enoughenergy to unpair6s² electrons and excite oneof them to higher orbital to have four unpairedelectrons around lead atom.

11.2. Assertion: The compounds formed by highlyreactive non-metals with highly reactive metalsaregenerally ionic while compounds formed between non-metals themselves are largely covalent in character.

Reason: There are large differencesin the electronegativities of highly reactive non-metals and highly reactive metals whereas small differences in theelectronegativities among the non-metals themselves.

11.1. Assertion: Non-metals readily form anions, in contrast to metals whichreadily form cations.

Reason: In general, non-metals have higher ionisation enthalpies and higherelectronegativities than the metals.

11.10. Write the resonance structures of CO₃^2- and HCO₃^–.

10.4. Salt of which alkaline earth metals do not impart colour to a non-luminous flame.

(a) Ca (b) Mg (c) Be (d) Ba

10.3. Which of the following is not a peroxide?
(a) KO₂                 (b) CrO₅              (c) Na₂O₂            (d) BaO₂

10.2. In the Solvay process
(a) An ammoniacal brine solution is carbonated with CO₂, forming NaHCO₃ which on decomposition at 150°C produces Na₂CO₃
(b) A sodium amalgam reacts with water to produce NaOH which gives Na₂CO₃ on reacting with CO₂
(c) A brine solution is made to react with BaCO₃ to produce Na₂CO₃
(d) All of the above