Stereoisomerism

Q. Find the total cyclic structural isomers of $C_6{H}_{12}$

Q. A crystal is made of particles A, B and C. A forms fcc packing, B occupies all octahedral voids of fcc and C occupies all tetrahedral voids of fcc.
If all the particles along one body diagonal are removed, then what will be the formula of the crystal?

1. $A_5{B}_4{C}_8$
2. $A_{5}B{C}_8$
3. $A_8{B}_4{C}_5$
4. $A_5{B}_2{C}_8$

Q.

Using IUPAC norms write the formulae for following:
(a) Potassium trioxalatoaluminate - (II)
(b) Dichloridobis (ethane - 1, 2 - diamine) cobalt (III)

Q.

Write the formulas for the following coordination compounds:

(i) Tetraamminediaquacobalt(III) chloride

(ii) Potassium tetracyanonickelate(II)

(iii) Tris(ethane−1, 2−diamine) chromium(III) chloride

(iv) Amminebromidochloridonitrito-N-platinate(II)

(v) Dichloridobis(ethane−1, 2−diamine)platinum(IV) nitrate

(vi) Iron(III) hexacyanoferrate(II)

Q.

When x molecules are removed from 200 mg of N_{​​​​​​2}​​​​​O, 2.89×10^-3 moles of N₂O are left. x will be

a.10²⁰ molecules

b.10¹⁰ molecules

c.10²¹ molecules

Q. Indicate whether each of the following pairs are identical, enantiomers or diastereomers:

1. I - enantiomers II - diastereomers III - identical
2. I - enantiomers II - identical III - identical
3. I - identical II - enantiomers III - enantiomers
4. I - enantiomers II - diastereomers III - enantiomers

Q. A crystalline solid is made of X, Y and Z. Atoms of X are present in ccp lattice; Y occupies all the octahedral voids and Z occupies all the tetrahedral voids. If all atoms along one body diagonal are removed then the simplest formula of solid will be:

1. $X_5{Y}_4{Z}_8$
2. $X_8{Y}_4{Z}_5$
3. $X_{2}Y{Z}_2$
4. $XY{Z}_2$

Q. In which of the following the enol form is dominant over keto form?

1. 
2. 
3. 
4. 

Q.

The total number of stereoisomers that can exist for M is

1. 2

2. 3

3. 4

4. No stereoisomers.

Q.

What is peptization and coagulation?

Q.

What is an electrovalent compound?

Q. Which of the following molecules are chiral?

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

Q. For CaCO3(s)--CaO(s)+CO2(g) at 977°C ∆H=174KJ/mol ;then ∆E is

Q. Using IUPAC norms write the formulae for the following:
(a) Sodium dicyanidoaurate (I)
(b)Tetraamminechloridonitrito-N-platinum (IV) sulphate

Q. For the preparation of isopropyl bromide from isopropyl alcohol, which of the following reagents is most preferred? P4/Br2, Br2/CH3COOH, HBr/H2SO4, NaBr

Q. Addition of chlorine to potassium iodide solution gives it a dark violet colour but excess chlorine makes it colourless.explain

Q.

Which is stronger acid Phenol or Cresol?

Q. Among the following four structures, I to IV:

1. All four are chiral compounds
2. Only (I) and (II) are chiral compounds
3. Only (II) is a chiral compound
4. Only (II) and (IV) are chiral compounds

Q. The maximum number of isomers (including stereoisomers) that are possible on monochlorination of the following compound is

1. 5
2. 8
3. 6

Q. $\alpha -D-$ glucose and $\beta -D-$ glucose differ from each other due to difference in one of the carbons with respect to its

1. Number of OH groups
2. Conformation
3. Size of hemiacetal ring
4. Configuration

Q.

Why aniline is insoluble in water?

Q. Is [Zn(gly)2] optically active?

Q. An aqueous blue coloured solution of transition metal sulphate reacts with H2S in acidic medium to give a black ppt. A which is insoluble in warm aqueous solution of KOH. The blue solution on treatment with KI in weakly acidic medium turns yellow and produces a white ppt B . Identify the transition metal ion.write the chemical reaction involved in the formation of A and B.

Q. The reagent(s) for the following conversion,

1. alc.KOH
2. alc.KOH followed by $NaN{H}_2$
3. aq.KOH followed by $NaN{H}_2$
4. $Zn/C{H}_{3}OH$

Q.

The full form of OLE is?

Q. Reaction of secondary and tertiary amines with nitrous acid

Q. The empty spaces represented by points A and B in a 3D arrangement of spheres given below are, respectively,

1. Tetrahedral voids and octahedral voids
2. Octahedral voids and tetrahedral voids
3. Tetrahedral void and triangular void
4. Both are tetrahedral voids

Q.

Element with atomic number 38 belongs to

1. $\mathrm{IIA}$ group and $5^{\mathrm{th}}$ period.

2. $\mathrm{IIA}$ group and $2^{\mathrm{nd}}$ period.

3. $\mathrm{VA}$ group and $2^{\mathrm{nd}}$ period.

4. $\mathrm{IIIA}$ group and $5^{\mathrm{th}}$ period.

Q. Lactic acid shows which type of isomerism

1. Geometrical isomerism
2. Tautomerism
3. Metamerism
4. Optical isomerism

Q. An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon. The ester formed will be 1. optically active mixture 2. pure enantiomer 3. meso compound 4. racemic mixture