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Published on: 13/05/2022
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latest Book back QuestionsDownload Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Chemistry Test1.
0.44g of a monohydric alcohol when added to methyl magnesium iodide in ether liberates at STP 112 cm3 of methane with PCC the same alcohol form a carbonyl compound that answers silver mirror test. Identify the compound.
2.
How will you convert acetylene into n-butyl alcohol.
3.
Complete the following reactions
ii) \(C_6H_5-CH_{2}CH(OH)CH(CH_3)_2 \overset{ConH_2SO_4}\longrightarrow\)
4.
An organic compound (A) of molecular formula C6H6O gives violet colour with neutral FeCI3. (A) gives maximum of two isomers (B) and (C) when an alkaline solution of (A) is refluxed with CCI4 (A) also reacts with C6H5N2CI to give the compound (D) which is red orange dye. Identify (A), (B), (C) and (D). Explain with suitable chemical reactions.
5.
Identify A,B,C,D and write the complete equation
1.
Mass = 0.44 g
No. of moles = Given Volume/Molar Volume = 112/22400
Molar Mass = 0.44/112 x 22400 = 88g
CnH2n+1 + OH = 88
12n+ (1)(2n+1) + 16 +1 = 88
14n + 18 = 88
14n = 88 - 18
n =70/14 = 5
Pentanoicacid
2.
3.
(i) .JPG)
n-Nitro benzoate (Major Product)
(ii) .JPG)
4.
(i) Compound A giving violet colour with neutral ferric chloride is phenol (C6H5OH).
(ii) (B) and (C) isomers are formed when alkaline solution of (A) is refluxed with CCI4.
(iii) (A) when treated with C6H5N2CI, forms a red orange dye (D).
| Compound | Compound Name | Formula |
| A | Phenol | C6H5OH |
| B | o-Hydroxy benzoic acid |  |
| C | p-Hydroxy benzoic acid |  |
| D | p-Hydroxy azo benzene |  |
5.
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