Introduction to Optical Isomerism
Trending Questions
Q. 42. in an atom 2K, 8L, 8M, 2N electrons are present if m=0, s=0.5, then find number of such electron a.6 b.2 c.8d.16
Q. 2. The quantum number for the outermost electron of an element are n=2, l=0, m=0, s=+1/2. The atom is ?
Q. 15 : In an atom with 2K, 8L , 13M and 2N electrons. Maximum possible electrons with m = 0, s = +1/2 is
Q. the correct set of four quantum numbers for the valance electron of kr(Z=36) having highest value of n+l is how 4, 2, 2, 1/2 possible 4d is absent in kr
Q. The first and second ionisation enthalpies of anelement are 520 and 7300 kJ/mol respectively. Theelement is likely to be(1) A reactive non-metal(2) A noble gas(3) A reactive monovalent metal4) A non-reactive metal
Q. atomic number.6.3 Jonization Enthalplesalkaline earth metals have low ionizationthalpies due to fairly large size of the atoms.ce the atomic size increases down theup, their ionization enthalpy decreasesble 10.2). The first ionisation enthalpies ofalkaline earth metals are higher than thosehe corresponding Group 1 metals. This isto their small size as compared to theesponding alkali metals. It is interestingote that the second ionisation enthalpiesy why inwritten largw size it should be smal
Q. 20) What are the four quantum numbers forhighest energy in sodium atom
Q. H2S , a toxic gas with a rotten egg like smell is used for the qualitative analysis. If the solubility of H2S in the water at STP is 0.195 m, then Henry's law constant (in atm) is nearly :
- 285
- 145.2
- 2890.4
- 28.94
Q. which of the following is not a chiral compound?
(1)hexane (2)n-butane (3)methane (4)2, 3, 4-trimethylhexane
Q. the normality of orthophosphoric acid having purity of 70% by weight (specific gravity=1.54) would be
Q. What is stereoisomerism and space isomerisim
Q. Explain why alkali metals never found in free state?
Q. Which of the following molecules does not show stereo isomerism?
<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> JEE (MAIN)-2021
<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> JEE (MAIN)-2021
- 3, 4-Dimethylhex-3-ene
- 4-Methylhex-1-ene
- 3-Methylhex-1-ene
- 3-Ethylhex-3-ene
Q.
Which of the following comprise of stereoisomers?
Geometric isomerism
Optical isomerism
Both a and b
Neither a nor b
Q. Which one of the following contain asymmetric carbon atom ?
Q. 60. How to predict the shape of the following ions by VSEPR theory? 1.SiF_4 2.NH_2^- 3.NH_4^+ 4.C_2H_2 5.F_2O 6.PF_5 7.PCl_3 8.H_3O^+
Q.
Correct set of for quantum numbers for the outermost electron of rubidium (Z = 37).
Q. A hydrocarbon X is optically active. X upon hydrogenation gives an optically inactive alkane Y. Which of the following pair of compounds can be X and Y respectively?
- 4-methyl-2-hexene and 3-methylhexane
- 4-methylcyclopentene and methylcyclopentane
- 2- methyl-1-butene and 2-methylbutane
- 3-methyl-1-pentene and 3-methylpentane
Q. The number of unpaired electrons in O, molecule is(1) Zero(2) 1(3) 2(4) 3
Q. Which of the following compounds may not exist as enantiomers ?
- CH3CH2CH(CH3)CH2OH
- CH3CH(OH)CO2H
- C6H5CHClCH3
- C6H5CH2CH3