Organic chemistry-some basic principles and techniques practice · Mixed difficulty

Which resonating structure of vinyl. Chloride is least stable

Which one of the following compounds is most polar?

Thiophene is separated from benzene by:

Correct order of -I effect is:

(a) $-\stackrel{\oplus}{\text{N}} \text{R}_3$

(b) $-\stackrel{\oplus}{\mathrm{N}} \mathrm{H}_3$

(c) -CHO

(d) -COOH

Consider thiol anion $\left( {R{S^ \ominus }} \right)$ and alkoxy anion$\left( {R{S^ \ominus }} \right)$. Which of the following statement is correct?

The order of decreasing stability of the carbanions

$\begin{array}{cccccccccccccccccccc} {{{\left( {{\text{C}}{{\text{H}}_3}} \right)}_3}{{\text{C}}^ - }}&{{{\left( {{\text{C}}{{\text{H}}_3}} \right)}_2}{\text{C}}{{\text{H}}^ - }}&{{\text{C}}{{\text{H}}_3}{\text{CH}}_2^ - }&{{{\text{C}}_6}{{\text{H}}_5}{\text{CH}}_2^ - } \\ {\left( {\text{I}} \right)}&{\left( {{\text{II}}} \right)}&{\left( {{\text{III}}} \right)}&{\left( {{\text{IV}}} \right)} \end{array}$

IUPAC name of $[Pt{(N{H_3})_3}(Br)(N{O_2})Cl]\,\,Cl$ is

An organic compound has carbon and hydrogen percentage in the ratio 6:1 and carbon and oxygen percentages in the ratio 3:4. The compound has the empirical formula

The number of ${1^ \circ },{2^ \circ }$ and ${3^ \circ }$ carbon atoms present in isopentane are respectively :

Give IUPAC name of the compound given below
$C{H_3} - \mathop {CH}\limits_{\mathop |\limits_{Cl} } - C{H_2} - C{H_2} - C{H_2} - \mathop {CH}\limits_{\mathop |\limits_{OH} } - C{H_3}$

The compound isomeric with acetone is :

Statetment-1: In chromatographic technique retardation factor $(R_f)$ does not depend on the polarity of solvent.
Statement -2: Thin layer chromatography is an example of absorption chromatography.

The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen was passed in 100 mL of 0.1 M sulphuric acid. The excess of acid required 20 mL of 0.5 M sodium hydroxide solution for complete neutralization. the organic compound is

Mesomeric effect involves delocalisation of

$9.9 \mathrm{~g}$ amide with molecular formula $\mathrm{C}_4 \mathrm{H}_5 \mathrm{N}_x \mathrm{O}_y$ on heating with alkali liberated $1.7 \mathrm{~g}$ of ammonia. If the percentage of oxygen is $33.33 \%$ then the ratio of '$\mathrm{N}$' and '$\mathrm{O}$' atoms in the compound is:

Stereoisomers (geometrical or opticals) which are neither superimposable nor mirror image to each other are called :

The $\mathrm{C}-\mathrm{C}$ bond length of the following molecules is in the order.

The group named as benzal possesses ……nature.

Percentage of hydrogen is maximum in .

On monochlorination of $n$- pentane, the number of isomers formed is :

Which of the following alkyl halides is used as a methylating agent?

Select the correct statements

Arrange priority CIP sequence of given groups in decreasing order

i) $OH \quad$ ii) $COOH \quad$ iii) $CHOHCH_3 \quad$ iv) $CH_2OH$

When thiourea is heated with metallic sodium, the compound which can't be formed is

Nucleophiles are :

Who pointed out the concept hyperconjugation?

Example of chain isomerism are

Which of the following group show $+ M$. effect

$C{H_3} - \mathop C\limits_{\begin{array}{cccccccccccccccccccc} | \\ {C{H_3}} \end{array}}^{\begin{array}{cccccccccccccccccccc} {C{H_3}} \\ | \end{array}} - C{H_2} - Cl\xrightarrow[\Delta ]{{{\text{alc}}{\text{. }}KOH}}{\text{P}}\left( {{\text{major}}} \right)$

Major product '$\mathrm{P}$' is

$0.38 \mathrm{~g}$ of a silver salt of a dibasic acid on ignition gave $0.27 \mathrm{~g}$ of silver. Calculate the molecular mass of the acid.