Organic Compounds

Q.

What is Bial’s test?

Q.

What is alchemy?

Q. number of structural isomers possible in C3H6O A)9 B)6 C)5 D )

Q.

Hydrogen ion concentration in mol/L in a solution of pH​ 5.4 will be

1. 3.98 x 10⁸

2. 3.88 x 10⁶

3. 3.68 x 10^-6

4. 3.98 x 10^-6

Q. Why are non aromatic compounds more stable than anti aromatic compounds?

Q.

Which of the following is not an organic compound?

1. 

2. 

3. 

4. 

Q. which is more basic pyridine or piperidine

Q.

Calculate the percentage by mole of ${\mathrm{NO}}_2$ in a mixture of ${\mathrm{NO}}_2\left(\mathrm{g}\right)$ and $\mathrm{NO}\left(\mathrm{g}\right)$ having average molecular mass equal to $34$?

1. $20\%$

2. $25\%$

3. $40\%$

4. $75\%$

Q. 12. Total number of possible isomers of [Pt(NH3)2(NO2)2] are? 1)12 2)15 3)6 4)5

Q.

Carboxylic acids are easily ionised. The main reason of this statement

1. Absence of a-hydrogen

2. Resonance stabilisation of carboxylate ion

3. Reactivity of a-hydrogen

4. Hydrogen bond

Q. How many sigma($\sigma$) and pi($\pi$) bonds does a molecule of $C_2{H}_2$ possess?

1. $\sigma =6,\pi =0$
2. $\sigma =2,\pi =3$
3. $\sigma =3,\pi =2$
4. $\sigma =4,\pi =1$

Q. 2. Hybridisation influences the bond length and bond enthalpy in organic compound .Why and how?

Q. 37. Which amongst the following carbocations is most stable? 1) (C6H5)CH2+ 2)(CH3)C+

Q. 38. Most stable carbocation is? 1) CH2+ -----CH3 2) CH2+ -----NH2 3) CH2+ -----OH 4):CH2+ -----SH

Q.

Number of acyclic isomers represented by molecular formula $C_4{H}_{10}O$ are:

1. 7

2. 6

3. 4

4. 5

Q. 1) Arrange the following:

A) In decreasing order of the $p{K}_b$ values: $C_2{H}_{5}N{H}_2$, $C_6{H}_{5}NHC{H}_3,(C_2{H}_5{)}_{2}NH$ and $C_6{H}_{5}N{H}_2$

2) Arrange the following:

B) In increasing order of basic strength: $C_6{H}_{5}N{H}_2,C_6{H}_{5}N(C{H}_3{)}_2,(C_2{H}_5{)}_{2}NH$ and $C{H}_{3}N{H}_2$

3)(A) Arrange the following:

C) In increasing order of basic strength: Aniline, p-nitroaniline and p-toluidine

3) (B) Arrange the following:

D) In increasing order of basic strength: $C_6{H}_{5}N{H}_2,C_6{H}_{5}NHC{H}_3,C_6{H}_{5}C{H}_{2}N{H}_2$.

4) Arrange the following:

E) In decreasing order of basic strength in gas phase: $C_2{H}_{5}N{H}_2,(C_2{H}_5{)}_{2}NH,(C_2{H}_5{)}_{3}NandN{H}_3$

5) Arrange the following:

F) In increasing order of boiling point: $C_2{H}_{5}OH,(C{H}_3{)}_{2}NH,C_2{H}_{5}N{H}_2$

6) Arrange the following:

G) In increasing order of solubility in water: $C_6{H}_{5}N{H}_2,(C_2{H}_5{)}_{2}NH,C_2{H}_{5}N{H}_2$

Q.

What is the empirical formula of Fe₂O₃?

1. Fe₄O₆

2. FeO

3. Fe₂O₃

4. FeO₂

Q.

Aromatic compound containing Benzene Ring are known as:

1. Benzenoids

2. Alkynes

3. Arenes

4. Non-Benzenoids

Q. 54 Phenyl ethene or Ethenyl benzene which one is the iupac name of styrene??

Q. $C_1-C_2$ bond is shortest in:

1. 
2. 
3. 
4. 

Q. 28. What is the hybridisation of first carbon. In CH3CH2OH / ethanol with formula

Q.

What is the pH of ${10}^7$mol $L^{-1}$ HCl solution at ${25}^{\circ }$C?

1. 6.2

2. 7.05

3. 6.79

4. 7

Q. Is cyclobutadiene aromatic or anti aromatic?

Q.

Tetrahydrofuran is a type of:

1. Open chain organic compound

2. Closed chain organic compound

3. p-block elements

4. Inorganic compound

Q. 45. which one is least basic? 1 nf3 2 ncl3 3 nh3 4 nbr3

Q. resonance energy per benzene ring is maximum for benzene naphthalene phenanthrene anthracene

Q. 33. Structural isomers possible for c4h8br2 are (1) 3 (2) 9 (3) 10 (4) 4

Q. Arrange the following in the order of decreasing basic character:

1. 1>2>3>4
2. 4>3>2>1
3. 1>3>2>4
4. 2>3>4>1

Q. AN ORGANIC COMPOUND A ON TREATING WITH ACIDIFIED POTTASIUM DICHROMATE SOLUTION GIVES B WITH MOLECULAR MASS 60gm/mol . A ON HEATING WITJ CONC. H2so4 at 443 K produces a gas that decolurises bromine water . the compound A is

Q. A 5.2 molal aqueous solution of methyl alcohol CH3OH is supplied. what is mole fraction of methyl alcohol in solution ?