The compound 'A' when treated with methyl alcohol and few drops of H₂SO₄ give wintergreen smell. The compound 'A' is
Which of the following will not give iodoform test?
phospholipids are esters of glycerol with
In graphite, the electrons are
The maximum number of unpaired d-electrons are in
Fe+3 has 5 unpaired electrons, more than other ones.
Splitting of spectral lines under the influence of magnetic field is called
The answer is ZEEMAN EFFECT
In stark effect spectral lines split due to electricity.
In photoelectric effect the splitting of spectral line takes place as the light falls on the metal.
Alkyl groups are o- and p-directing because of
In which of the following molecule, all the atoms lie in one plane?
It has got sp2 hybridization, giving it a planar structure.Further backbonding from flouine makes the B-F bonds stronger than normal single bonds
Pairs of species having identical shapes for molecules is
Which one of the following is expected to exhibit optical isomerism
Nickel is purified by
The oxidation state of Cr in [Cr(NH₃)₄Cl₂]⁺ is
Applying sum of individual charge = charge on molecule
x+(0)×4 + (-1)×2 = +1
Which of the following noble gas is least polarisable?
The IUPAC name of
Correct name is 2-Chloro-4-ethyl-3-methyl hept-2-ene-6-yne
When HCl gas is passed through a saturated solution of common salt, pure NaCl is precipitated because
Which of the following pair represents stereoisomerism?
Which of the following pair of elements belongs to same period of the periodic table?
Natural rubber is a polymer of
In view of their low ionization energies, the alkali metals are
100 ml of a liquid A was mixed with 25 ml of a liquid B to give B to give a non-ideal solution of A-B mixture. The volume of this mixture would be
Concept: Negative deviation. Final volume decreases due to negative deviation from original volume 125 ml. So, the volume of the mixture would be close to 125 but not exact 125. Hence, (c) is the correct answer.
Ethylbenzene with Br2 in the presence of FeBr3 gives
C2H5 ethyl group is electron donating group , and when an electron donating group is attached to the benzene ring it increases affinity of other molecules to get attached at the ortho and para positions .
Geometric isomerism will be exhibited by
In this compound both the carbon atoms bonded by the double bond have two different group attached to them
Formation of ammonia from H₂ and N₂ by Haber's process using Fe is an example of
Which of the following transition metal cation has maximum unpaired electrons ?
Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient conditions is
The CMC (critical micelle concentration) value of the surfactants depends both on the size of the hydrophobic chain (tail) and size of the hydrophilic domain (head). The two contributions are counteracting with a lower CMC for a larger hydrophobic chain and a higher hydrophilic domain.
The percentage of p-character in the orbitals forming P ― P bonds in P4 is
How many bonds are there in
It's C(i.e.19sigma and 4π bond.)
The number of structural isomers for C6H14 is
Among the following, the coloured compound is
In CuF2, Cu2+ ions exist, having de configuration.
Unpaired electron causes colour (d-d transition).
In the crystalline form, CuF2 is blue coloured.
Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound E on further treatment with aqueous KOH yields compound F. Compound F is