Basic Principles of organic Chemistry

If 0.189 g of chlorine containing organic compound gave 0.287 g of silver chloride then the percentage of chlorine in the organic compound is

The compounds having only primary hydrogen atoms is

2-phenylethylbromide when heated with NaOEt, elimination takes place. No deuterium exchange takes place when the reaction is carried out in C₂H₅OD solvent. The mechanism will be

The strained tetracyclic alkane is isomerized thermally to the cyclic alkene.The reaction involves

Decreasing order of nucleophilicity is

The IUPAC name of (CH₃)₂CH – CH₂ – CH₂Br is

Which of the following technique is most suitable for purification of cyclohexanone from a mixture containing benzoic acid, isoamyl alcohol,cyclohexane and cyclohexanone

In steam distillation of toluene, the pressure of toluene in vapour is

The best method for the separation of naphthalene and benzoic acid from their mixture is

Which one is most reactive towards SN1 reaction

Which of the following species is not electrophilic in nature

In Dumas’ method of estimation of nitrogen 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (aqueous tension at 300 K = 15 mm)

Among the following compounds the one that is most reactive towards electrophilic nitration is

Which of the following compounds is isomeric with 2,2,4,4-tetramethylhexane

Nitrogen in an organic compound can be estimate by

In Lassaigne’s test a violet colour obtained indicates the presence of

Molecule in which the distance between the two adjacent carbon atoms is largest is

The IUPAC name of tert-butyl alcohol is

In methane four C-H bonds are directed towards the corners of

Metallic sodium can be stored in

The number of structural isomers in hexane is

Which of the following processess are not used for the purification of solid impurities

Orthonitrophenol is steam volatile while para-isomer is not. This is because of

A mixture of champhor and benzoic acid can be separated by

Dumas method involves the determination of nitrogen content in the organic compound in the form of

Which of the following statement about the member of any one homologous series are true

The number of sigma and pi-bonds in but-1-ene-3-yne are

IUPAC name of CH₃CH₂CH₂CH(CH₃)COCH₃ is

The general molecular formula for a cycloalkyl group is

Which one of the following has an aromatic character

Alkyl halides undergoing substitution nucleophilic bimolecular reaction involves

An alkane with a molecular formula C₆H₁₄ reacts with chlorine in the presence of light and heat to give two constitutionally isomeric monochlorides of molecular formula C₆H₁₃Cl.What is the most reasonable starting alkane

A nucleophilic substitution reaction proceeds through SN1 mechanism. So, the reaction is

The functional isomer of ethanol is

Which of the following gases are poisonous

The total number of isomeric alcohols with the molecular formula C₄H₉OH is

The IUPAC name of tertiary butyl chloride is

Number of σ and π- bonds in acetylene is

In acetylene molecule, the two carbon atoms are linked by

In Kjeldahl’s method,ammonia from 5g of food neutralizes 30 cm³ of 0.1 N acid.The percentage of nitrogen in the food is

Reaction of methyl bromide with aqueous sodium hydroxide involves

Which one of the following is not true for the hydrolysis of t-butyl bromide with aqueous NaOH

Chromatography is a valuable method for the separation, isolation,purification and identification of the constituents of a mixture and it is based on general principle of

Difference in density is the basis of

An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour density is 73. Molecular formula of the compound is

116 mg of a compound on vaporisation in a Victor Meyer’s apparatus displaces 44.8 mL of air measured at S.T.P. The molecular weight of the compound is

0.4 g of silver salt of a monobasic organic acid gave 0.26 g pure silver on ignition. The molecular weight of the acid is (atomic weight of silver = 108)

The number of primary, secondary and tertiary carbons in 3,4-dimethylheptane are respectively

Glycerine is purified by

The covalent bond length is the shortest in which one of the following bonds

Aniline is separated from aniline-water mixture by

Only sp and sp² hybrid orbitals are involved in the formation of

When CO₂ is passed through solution of calcium hydroxide,Which one of the following compound is precipitated

C₆H₆ consists of one ring,while naphthalene consists of two rings. Both of them are aromatic and obey the (4n+2) rule.Thus the number of π-electrons inside rings of C₆H₆ and naphthalene are respectively

Cyclopentadienyl anion is

A nucleophile must have

CCl₄ is used as a fire extinguisher, because

The inert form of carbon is

Benzene is obtained by the fractional distillation of

The latest technique for the purification of organic concept is

The C – C bond length in ethane is

The molecular weight of a gas is 45. Its density at STP is

The number of isomers in C₄H₁₀O is

Bond length between hybridised carbon atom and other carbon atom is minimum in

Which of the following C-H bonds has lowest bond dissociation energy

The hybridisation of C₂H₂ is

A hydrocarbon contains 20% hydrogen and 80% carbon.The empirical formula is

The compound that does not produce blue colour in Lassaigne’s test is

Dumas method is used for the estimation of

The isomerism represented by ethyl acetoacetate is

n-Butane and isobutane are

Petroleum is a mixture of

Two miscible liquids can be separated by

If N and S both are present in an organic compound then during Lassaigne’s test, both will change into

The latest technique for the purification of organic concept is

0.765 gm of acid gives 0.55 g of CO₂ and 0.12 g of H₂O.Then find the ratio of the percentage of carbon and hydrogen

Which compound show geometrical isomerism

Molecular mass of a compound having empirical formula C₂H₅O is 90. Molecular formula is

Which of the following shows linear structure

Propanone and propanal are …. Isomers

Term ‘Hexadecane’ in petroleum is commonly called as

Geometrical isomerism is possible in

An organic compound contains 40%C, 6.66% H and rest oxygen .its vapour density is 30.What will be its empirical formula

In Kjeldahl’s mathod, the nitrogen present is estimated as

Which of the following carbocations will be most stable