Structural Isomerism

Q. The number of structural isomers possible from the molecular formula $C_3{H}_{9}N$ is:

1. 4
2. 5
3. 2
4. 3

Q.

The total number of structural isomers possible for an amine with molecular formula ${\mathrm{C}}_4{\mathrm{H}}_{11}\mathrm{N}$?

1. 2

2. 3

3. 4

4. 5

Q. The ionic radii of $A^{+}$ and $B^{-}$ ions are $0.98\times {10}^{-10}$ m and $1.81\times {10}^{-10}$ m. The coordination number of each ion in $AB$ is

1. $8$
2. $2$
3. $6$
4. $4$

Q.

Priority of functional group for making corect iupac name of containing multiple functional group in compound

Q. The radius of a divalent cation $A^{2+}$ is $94pm$ and that of a divalent anion $B^{2-}$ is $146pm$. The compound $AB$ has:

1. Rock salt structure
2. Zinc blende structure
3. Antifluorite structure
4. Caesium chloride like structure

Q.

What is hydrate isomerism? Explain with an example?

Q.

Write the isomers of the compound having formula $C_4{H}_{9}Br$

Q. On complete combustion, 0.5 g of an organic compound gave 0.2g of carbon dioxide and 0.4 g of water. Choose the correct statement(s) :

1. $\%C$ in the compound is $10.9\%$
2. $\%C$ in the compound is $20.5\%$
3. $\%H$ in the compound is $15.5\%$
4. $\%H$ in the compound is $8.89\%$

Q. How many structural isomers exist for $C_4{H}_{8}O$ which are ethers with no $s{p}^2$ hybridised atoms?

1. 4
2. 3
3. 7
4. 6

Q.

What is impurity defects?

Q. The total number of structural isomers possible with molecular formula $C_3{H}_{6}C{l}_2$ are :

1. 2
2. 3
3. 5
4. 4

Q. The ionic radii of $R{b}^{+}$ and $I^{-}$ are $1.46$ and $2.16\stackrel{o}{A}.$ The coordination number for the cation is :

1. 2
2. 4
3. 6
4. 8

Q. The total number of all possible isomeric ketones of molecular weight 100 and molecular formula $\left(C_6{H}_{12}O\right)$ is/are:

1. 5
2. 4
3. 3
4. 6

Q.

What is the relationship between the members of following pairs of structures? Are they structural or geometrical isomers or resonance contributors?

Q.

A crystal is made up of particles A and B. A forms FCC packing and B occupies all the octahedral voids. If all the particles along one of the diagonal plane in the unit cell are removed, then, the formula of the crystal would be :

(a) AB (b) A₅B₇ (c) A₇B_{5 (d) none of these}

Q. How many amide isomers are possible for $C_4{H}_{9}ON$ ?

1. 8
2. 6
3. 5
4. 4

Q. How many acyclic structural isomers of $C_4{H}_{7}Cl$ is possible?

1. 10
2. 5
3. 6
4. 8

Q. How many acyclic structural isomers of $C_4{H}_{7}Cl$ is possible?

1. 10
2. 5
3. 6
4. 8

Q. For isomeric alkyl halides, the boiling point decreases with branching. This is due to:

1. Increase in the surface area
2. Decrease in the surface area
   
3. Molecular mass decreases
   
4. Molecular mass increases

Q. An organic compound has molecular formula $C_9{H}_{18}$. Its all carbon atoms are $s{p}^3$ hybridized and its all hydrogen atoms are identical. Its structural formula can be

1. 
2. 
3. 
4. 

Q. Select the correct statement(s) i) The C.N. of cation occupying a tetrahedral hole is 4 ii) The C.N. of cation occupying a octahedral hole is 6
iii) In Schotky defects, density of the lattice decreases.

IV)In Frenkel defects, density of the lattice increases.

1. i, ii & iv

2. i& iii

3. ii & iii

4. i, ii & iii

Q. How many total structural isomers are obtained when three hydrogen atoms are replaced by chlorine atom from molecular formula $C_3{H}_8$?

1. 5
2. 4
3. 3
4. 6

Q.

Why is dark and cold conditions is preferred for chlorination of benzene when the chlorine is in excess quantities while usually the condition in which light is available is preferred? In have an assumption . light makes homolytic cleavage in which chlorine radical is resulted which is not preferred there and in dark condition the catalyst makes its work by breaking the chlorine bond by a heterolytic manner. Is my intuition correct? Or is there any other reason ?.

Q. Which of the following compounds are structural isomers of $C_5{H}_{10}O$?
(I) 2-methylbutanal
(II) Propyl ethanoate
(III) Pentanal
(IV) Pentanone

1. I and IV
2. I, II and III
3. I, III and IV
4. I and III

Q.

What is ethoxy methane?

Q. Number of optical isomer of lactic acid are

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

Q. Select the incorrect statement(s) about the complex $\left[Cr\right(N{O}_2\left)\right(N{H}_3{)}_5\left]\right[Zn\left(SCN{)}_4\right].$

1. It shows coordination isomerism
2. It shows hydrate isomerism
3. It shows linkage isomerism
4. IUPAC name of the compound is Pentaamminenitrito-N-chromium(III) tetrathiocyanato-S-zincate(II)

Q. How many structural isomers can diphenylmethane have when one of the hydrogen atoms is replaced by a chlorine atom?

1. 6
2. 4
3. 7
4. 8

Q. Heat of hydrogenation of ethene is x1 and that of benzene is x2 calculate resonance energy of benzene

Q. The ionic radii of $A^{+}$ and $B^{-}$ ions are $0.98\times {10}^{-10}m$ and $1.81\times {10}^{-10}m.$ The coordination number of each ion in $AB$ is:

1. 2
2. 4
3. 6
4. 8