Stereoisomerism

Q.

The absolute configuration of the following compound is

1. 2R, 3S

2. 2R, 3B

3. 2S, 3S

4. 2S, 3R

Q.

The number of moles of $KMn{O}_4$ reduced one mole of KI in alkaline medium.

Q. AlCl3, MgCl2, CCl4, NaCl, NCL3 arrange the given compounds in increasing order of ionic nature

Q. Why hybridization of C in C3O2 is sp

Q.

A sample of air consisting of $N_2$ and $O_2$ was heated to 2500 K until the equilibrium $N_2$ (g) + $O_2$ (g) $\rightleftharpoons$ 2NO (g) was established with an equilibrium constant $K_c=2.1\times {10}^{-3}$. At equilibrium, the mole $\%$ of NO was 1.8. Estimate the initial composition of air in mole fractions of $N_2$ and $O_2$.

1. 

2. 

3. 

4. 

Q. In a vessel N2, H2 and NH3, are at equilibrium. Some helium gas is introduced into the vessel so that total pressure increases while temperature and volume remain constant. According to Le Chateliers principle, the dissociation of NH3 (a) increases (c) remains unchanged (d) equilibrium is disturbed. (b) decreases

Q. 32.Fecl2 , zncl2 , MgCl2, NaCl which of the given molecule is having least ionic character?

Q. what is the difference between coordinate bond and back bon

Q. The maximum amount of magnesium oxide formedwhen 16 g of Mg is burnt with 16 g of O2 in a closedvessel is(1) 26.67 g(3) 32 g40 g(4) 24.67 g

Q. Incorrect statement about ionic bond is Options: It involves electrostatic attraction Wrong It is a redox process Its formation is exothermic Should have chosen It leads to least stability to atoms in most of the case

Q. The correct statement(s) for the following addition reactions is/are:

1. (M and O) and (N and P) are two pairs of enantiomers
2. Bromination proceeds through trans-addition in both the reactions
3. M and N are identical molecules
4. (M and O) and (N and P) are two pairs of diastereomers

Q. 73. calculate the number of moles and molecules present in sulphur dioxide obtained by combustion of 6.4 * 10-2 kilogram of sulphur

Q. What is the plane of symmetry? What is the difference between molecular plane of symmetry and plane of symmetry?

Q. The dissociation energy of methane is 360 kilo calorie per mole and that of ethane is 620 kilo joule per mole the c-c bond energy is

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

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

Q. Pz bonding molecular orbital node

Q. 19.Which of the following compounds turns black on addition of ammonium hydroxide? 1.CuCl2 2.PbCl2 3.AgCl 4.Hg2Cl2

Q.

Which of the following is not a part of stereo isomerism?

1. Chain isomerism

2. Functional isomerism

3. Geometrical isomerism

4. Optical isomerism

Q.

The increasing order of bond dissociation energies of C - C, C - H and H - Hbonds is

1. H - H < C - H < C - C

2. C - C < C - H < H - H

3. H - H < C - C < C - H

4. C - H < H - H < C - C

Q. from 320 mg of o2, 6.023*10^20 molecules are removed .find the number of moles remained.

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.

what is meant by Organic chemistry briefly?

Q. 8 no. of planes of symmetry of borazine are

Q.

In an experiment during the analysis of a carbon compound, 145 l of $H_2$ was collected at 760 mm Hg pressure and ${27}^{\circ }$C temperature. The mass of $H_2$ is nearly

1. 10 g

2. 12 g

3. 24 g

4. 6 g

Q. 2. Structure and hybridisation of N_2O, ClO_2^+

Q. Let (+) tartaric acid has a specific rotation of + 11.1. Calculate the specific rotation of a mixture of 68% (+) tartaric acid and 32% (-) tartaric acid Report your answer to the closest integer.

Q. What are the different methods applied for the purification of colloidal solutions ?

Q. which have least polar bond? H-F O-H C-H N-

Q.

5.6 liters of of methane gas (CH4) is ignited in oxygen gas. Calculate the number of moles of CO2 formed

Q. How many optically active alcohols are possible having the molecular formula $C_5{H}_{12}O$?

1. \N
2. 2
3. 4
4. 6