A conjugated triene C₁₄H₂₀ on reductive ozonolysis gives cyclopentanone and glyoxal. Identify the structure.

A certain hydrocarbon A was found to contain 85.7% carbon, 14.3% Hydrogen. This compound consumes 1 moar equivalent of H to give a saturated hydrocarbon B. 1 gm of A just decolourised 38.05 gm of a 5% solution(by weight), of bromine in CCl4. Compound A on oxidation with hot conc. KMnO4 gave compound C(Ketone) and acetic acid. Identify the srtuctures of A, B, and C.

 

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An alkene C₉H₁₂ on ozonolysis gives a poly carboxylic acid containing 31.2% carbon, 66.7% oxygen. The alkene can consume 4 moles of Hydrogen in the presence of catalyst(Ni, Pd, Pt etc)The alkene shows no stereoisomerism. Identify its structure.

 

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An unsaturated and unbranched compound A(C5H4O , containing only double bonds) doesnot exhibit any stereoisomerism. 1 mole of A on ozonolysis givesa gas B, 2 carboxylic acids C & D. All 3 products B, C & D are converted to a poisonous oxide of carbon through a series of Reactions. This oxide is estimated by I2O5 wherein the liberated iodine is found to require 16/5 moles of hypo. Identify the structure of A. 

 

 

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The rate of flowing water from the orifice in a wall of a tank will be more of the orifice is

a)near the bottom

b)near the upper end

c)exactly in the middle

d)does not depend upon the position of orifice

 

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The velocity of a falling rain drop attains limiting value because of

a)upthrust of air

b)viscous force exerted by air

c)surface tension effect

d)air current in atmosphere

 

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The Terminal velocity v of a small sphere of radius r falling through a viscous liquidvaries wiith r such that

a)v/r is constant

b)vr is constant

c)vr² is constant

d)v/r² is constant

 

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How many active hydrogens are present in a compound (mol wt = 90), 0.45 gm of which when treated with ethylmagnesiumiodide liberates 224 ml of ethane at STP.

 

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What will be the possible structures of a hydrocarbon, 0.34 gm of which when treated with methyl magnesium iodide liberates 112 ml of methane at STP..

 

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