Electrophile attacks on the following
In which cases willbe at meta-position ?
Diborane reacts with water to form
In the sulphonation of benzene, the active species involved is
The geometry of unit is
The correct order of decreasing ionic character of lead dihalides is
Stable compounds in +1 oxidation state is formed by
The general trend in the properties of elements of carbon family shows that with the rise in atomic number
Which of the following statements is not correct ?
Which statement regarding H3BO3 is not correct ?
The different layers in graphite are held together by
Carbon monoxide acts as a Lewis base because it has
Number of structural isomers represented by molecular formula C4H10O is
The compound C4H10O can show
Which of the following are chain isomers ?
Number of isomers observed in C7H7Cl are
Which of the following compounds can exhibit both geometrical isomerism and enantiomerism ?
Which cannot be prepared by B2H6 ?
Aqueous solution of potash alum is
Which is a pair of geometrical isomers ?
Acetylene contains same degrees of unsaturation as
Which one of the following is the strongest acid ?
The number of electrons present in the valency shell of carbon of ion bearing +ve charge
Which of the following is a pseudo alum ?
Stability of can be explained by
Structure formula for lewisite is
Which of the following is the correct order of stability of free radicals ?
Arrange the following nucleophiles in the order of their nucleophilic strength
The increasing order of stability of the following free radicals is
Which of the following equations is not correctly formulated ?
Which of the following alkynes is most acidic ?
The compound obtained by the reaction of methyl alcohol with CH3MgX is
The number of different substitution products possible when bromine and ethane are allowed to react, is
Which of the following cannot be considered as a mechanistic step in chain reaction of methane with Cl2 ?
In the given reaction, Will be
What is formed when calcium carbide reacts with heavy water ?
Which of the following is the condition for best yield of C2H5Cl ?
Propene on ozonolysis forms
Which of the following statements regarding boron is not correct ?
The end product of the following sequence of operations
The presence of unsaturation in an organic compound can be tested with
Relative stabilities of the following carbocations will be in the order
CH2 = CH2 + HOCl → ....... + ...... → ethylene chlorohydrin. Fill in the blanks in the above reaction with
In the nitration of benzene with a mixture of conc.HNO3 and conc.H2SO4 , the active species involved is
The stability of +2 oxidation state of Pb can be explained on the basis of
The reaction of chlorine with toleune in presence of ferric chloride gives predominantly