Physical Properties

Q. 30. Which carbocation is more stable - benzyl or tertiary?

Q. 21 Why is said in boiling point of carboxylic acid is more than alcohol due to intermolecular attraction not intramolecular attraction

Q. Why cyclopropanyl carbocation is more stable than benzyl carbocation but less stable than tropylium carbocation? It is true that the more will be the resonating structure of carbocation , more will be the stability of the carbocation, then why benzyl carbocation with 5 resonating structure is less stable than cyclopropanyl carbocation having 3 resonating structure. explain this.

Q. 18. Assertion :- (CH3)3-C+ is more stable than (CD3)3-C+. Reason :- -CD3 has more +i effect than CH3.

Q. Themolecular mass of organic compound is 78 and its %composition is 92.4%c and 7.6%H.Find the molecular formula of the compound

Q. 34.The sum of total stereoisomers and fractions on the fractional distillation of 2, 3-dichloropentane is 1) 2 2) 6 3) 4 4) 3

Q. 58.7 Maximum mass of hydrogen is present in(1) 0.1 mol of CH1206(2) 1.5 mol of NH3(3) 22.4 L of H2S(g) at S.T.PSo(4) 0.5 g molecule of CeH

Q.

Identify the most basic compound from the following:

1. Primary amines

2. Secondary amines

3. Aromatic amines

4. Aliphatic amines

Q. A biomolecule contains 2% magnesium by mass.The minimum molecular mass of biomolecule is(1) 1200 u(3) 2400 u(2) 1800u(4) 2000 u

Q. ich of the following alkene is most reactive forhydration(1) ethene(2) propene(3) 1-butene(4) 2-methyl propene

Q. Mass of 2 gram molecules of CO2 is

Q.

Maximum pK_b value is for

1. (CH₃)₂NH

2. (CH₃ CH₂)₂NH

3. C₆H₅NHC₆H₅

4. C₆H₅NHCH₃

Q. which is incoorect stability order 1.CH2=CH-C^+H2>CH3-CH^+-CH3 2.CH2=CH^+CH3-CH^--CH3 4.CH3C^+H2>CH3O-C^+H2

Q. of the following the most stable alkene is 2, 3 dimethylbut2ene 2 methylpent 2 ene cis hex 2 ene hex 1 ene. give reaso

Q. 30g of KMnO4 sample containing inert impurity is completely reacted with 60 ml of 56 volume ofH2O2 in acidic medium, then what is thepercentage purity of KMnO4? (Molecular weight ofKMnO4 158)(1) 35.5%(3) 63.2%(2) 36.8%(4) 64.5%

Q. Calculate the mass of 2.5g atom of oxygen.

Q. alkyl aryl carbocation is more stable or aryl carbocation

Q. Solubility of amines in water with increase in molecular mass due to size of the hydrophobic part.

1. increases
2. decreases
3. smaller
4. higher

Q.

Why are amines basic?

Q. Solve this ;

Problem 1.1: Calculate molecular mass of glucose (C₆H₁₂O₆) molecule.

Q. 100 mL of 1 M KMnO4 oxidised 100 mL H2O2 in acidic. Calculate the volume of same KMnO4 required in alkaline medium to oxidise 100 mL of H2O2 of same concentration

Q. what is the mass of carbon dioxide which contain the same number of molecules as are contained in 40g of oxyge

Q. Draw the structure of:

A $BeC{l}_2$ (vapour)

B $BeC{l}_2$ (solid)

Q. Find the mass of 3 g of molecules of HNO3

Q. ehat is the meaning of more substitted alkene is more stable

Q. What is Birch Reduction Reaction? What are products when a nitro benzene reacts with na/liq nh3

Q. 7 Calculate the no.of oxygen atoms in 10g of calcium carbonate. Also calculate mass of oxygen molecules which contain same no.of molecules as in 1.4g of nitrogen.

Q. 22. A gas has molecular formula (CH)n.If vapour density of the gas is 39, what should be the formula of the compound? (A)C3H3 (B)C4H4 (C)C2H2 (D)C6H6

Q. 1) calculate the concentration of nitric acid in moles per litter in a sample which has a density , 1.41g ml^-1 and the mass percent of nitric acid in it being 69%?

Q.

Calculate the mass of sodium acetate (CH₃COONa) required to make 500 mL of 0.375 molar aqueous solution. Molar mass of sodium acetate is 82.0245 g mol^–1