JEE Main entrance exam Question Bank Solutions for Chemistry (JEE Main)

In the given reactions sequence, the major product 'C' is:

\[\ce{C8H10 ->[HNO3][H2SO4] A ->[Br2][\Delta] B ->[alcoholic][KOH] C}\]

The decreasing order of reactivity of the following organic molecules towards AgNO₃ solution is ______.

1. 
   
2. 
   
3. \[\begin{array}{cc}\ce{CH3CHCH3}\\
   |\phantom{..}\\\ce{Cl}\phantom{.}\end{array}\]
4. \[\begin{array}{cc}\ce{CH3CHCH2NO2}\\
   |\phantom{......}\\\ce{Cl}\phantom{.....}\end{array}\]

The number of stereoisomers are possible for a compound of the molecular formula \[\ce{CH3 - CH = CH - CH(OH) - Me}\] is ______.

Arrange the following in increasing order of reactivity towards nitration

1. p-xylene
2. bromobenzene
3. mesitylene
4. nitrobenzene
5. benzene

Choose the correct answer from the options given below:

Number of amphoteric compound among the following.

1. Phenyl methenamine
2. N, N - Dimethylaniline
3. N - Methyl aniline
4. Benzenamine

Choose the correct order of the basic nature of the above amines.

The mechanism of action of "Terfenadine" (Seldane) is ______.

The amine 'A' when treated with nitrous acid gives yellow oily substance. The amine A is ______.

Which of the following statement(s) is/are incorrect in case of Hofmann bromamide degradation?

The polymer, which can be stretched and retains its original status on releasing the force is ______.

An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the product having manganese in a higher oxidation state is ______ B.M. (Nearest integer)

Which of the following are isostructural pairs?

(A) \[\ce{SO^{2-}4}\] and \[\ce{CrO^{2-}4}\]

(B) SiCl₄ and TiCl₄

(C) NH₃ and \[\ce{NO^-3}\]

(D) BCl₃ and BrCl₃

The reaction of sulphur in alkaline medium is given below:

\[\ce{S8(s) + {a} OH^-(aq) -> {b} S^{2-}(aq) + {c} S2O^{2-}3(aq) + {d} H2O(l)}\]

The values of 'a' are ______. (Integer answer)

The species given below that does NOT show a disproportionation reaction is ______.

To synthesise 1.0 mole of 2-methylpropan-2-ol from Ethylethanoate ______ equivalents of CH₃MgBr reagent will be required. (Integer value)

The products "A" and "B" formed in above reactions are:

Consider the following reactions:

(i) \[\ce{Glucose + R-OH ->[Conc. HNO3] [A] ->[X eq of][(CH3CO)2O] Acetyl derivative}\]

(ii) \[\ce{Glucose ->[Ni/H2] [A] ->[Y eq of][(CH3CO)2O] Acetyl derivative}\]

(iii) \[\ce{Glucose ->[Z eq of][(CH3CO)2O] Acetyl derivative}\]

'X, 'Y' and 'Z' in these reactions are respectively:

An aldehyde isomeric with allyl alcohol gives phenyl hydrazone. Pick out a ketone that too gives a phenyl hydrazone containing the same percentage of nitrogen.

\[\ce{C3H8O ->[{[O]}][K2Cr2O7/H2SO4] C3H6O ->[I2 + NaOH(aq.)] CHI3}\]

In this reaction the first compound is:

\[\ce{H2O2 -> H2O + O2}\]

This represents ______.