Preparation of Alcohols from Carbonyl Compounds

Q. The correct sequence of reagents for the following conversion will be:

1. $C{H}_{3}MgBr,H^{+}/C{H}_{3}OH,\left[Ag\right(N{H}_3{)}_2{]}^{+}O{H}^{-}$
2. $C{H}_{3}MgBr,\left[Ag\right(N{H}_3{)}_2{]}^{+}O{H}^{-},H^{+}/C{H}_{3}OH$
3. $\left[Ag\right(N{H}_3{)}_2{]}^{+}O{H}^{-},C{H}_{3}MgBr,H^{+}/C{H}_{3}OH$
4. $\left[Ag\right(N{H}_3{)}_2{]}^{+}O{H}^{-},H^{+}/C{H}_{3}OH,C{H}_{3}MgBr$

Q. When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

Q. $C_6{H}_5-CH=CH-CHO\to C_6{H}_5-C{H}_2-C{H}_2-C{H}_{2}OH$ in the presence of X, what will be X:

1. $Li\left(Al{H}_4\right)$
2. $Na(BH{)}_4$
3. Aluminium isopropoxide
4. All of these

Q. cyclopentene and cyclopentane carbocation which is more stable

Q. what is the major product when cyclopentene reacts with chlorine in prence of wate

Q. 2-methylcyclopent-1, 3-diene+ HBr \xrightarrow[{(1, 4 addition)}]{40C}X (major)

Q. 34 Which product is formed when ethyne is treated with Na & liquid NH3 ?

Q. Explain Hyperconjugation.

Q. How Many Isomeric Pentanols give 2-methylbut-2-ene as major product on dehydration ?

Q. Explain the process of analytic balance

Q. How to learn the structure of pyridine, firon, purane etc

Q. 21. Structure of H , C , N and their oxidation state in HCN are

Q. prove that value of R is 8.314

Q. Why ethylcyclopentane is not considered as structural isomer of dimethylcyclopentane? Explain

Q. Where we have to use M¹V¹=M²V² and M¹V¹=M(f)V(f)

Q. When SO2 is passed into an acidified potassium dichromate solution, the oxidation numbers of S and Cr in the final products respectively are a) +6, -3 b) +2, +3 c) 0, +3 d) +6, +3

Q.

LiAIH₄ converts acetic acid into[CPMT 1977; MP PMT 1990, 92]

1. Acetaldehyde

2. Methane

3. Ethyl alcohol

4. Methyl alcohol

Q. Diffentiate between Schottky and Frenkel defect.

Q. Which of the following cannot be prepared directly by using NaOH?

1. Na2S

2. Na2S5

3. Na2S4O6

4. Na2S2O3

Q. What is Zaitsev Rule

Q. What is Avadgaro law?

Q. What happens when alkanes reacts with acids

Q. Why ethylcyclopentane is not considered as structural isomer of dimethylcyclopentane? Explain

Q. What is dulongś and petitś law?

Q.

H2O2 is an oxidising as well as reducing agent

Q. 1-methylcylcopentene reacts with HBr in presence of peroxide gives

Q. cooh-cooh decomposes to co + co2 +h2o. cooh-cooh is 10g. Find the mass of co, co2 and h20 using POAC.

Q. Rounding off

Q.

K I + Cl2 ---- KCl + I2 how to devide it in two half reactions?

Q. for the given equation the change in entropy is positive or negative? WHY? Fe(400k)-------->Fe(300k)