1-Phenylethanol can be prepared by the reaction of benzaldehyde with
Phenols are more acidic than alcohols because
Which is most ionic?
For a specie to be ionic there must be -
lesser the number of charge which is there in MnO.
An electrophile is a reagent attracted to electrons. Electrophiles are positively charged or neutral species having vacant orbitals that are attracted to an electron rich centre. It participates in a chemical reaction by accepting an electron pair in order to bond to a nucleophile.
The effect of atoms or groups loosing electrons towads a carbon atom is called
Electronic configuration of deuterium atom is
Deuterium is also known as "Heavy Hydrogen"
A Deuterium atom consists of a proton, a neutron and an electron.
It is just like the Hydrogen, but only with a. neutron.
So, electronic configuration is same as that of Hydrogen: 1s¹
If principal quantum no. of atom is 3, then its azimuthal quantum number is
Among the following the achiral amino acid is
Which of the following is paramagnetic species?
The IUPAC name for the complex
[Co(NO2) (NH3)5] Cl2 is :
How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?
Low spin complexes are generally formed by the elements of
This is because pairing in these (5d & 4d series) elements does not depend upon strength of ligand. it takes almost always, forming low spin complex, unlike 3-d series elements , pairing in 3d series elements depends upon strength of ligand
The correct IUPAC name of the structure given below is :
Which of the following is not correct?
There are three sigma bonds and three pi bonds showing a hybridization type: sp3 type.
When HCl gas is passed through a saturated solution of common salt, pure NaCl is precipitated because
Explanation:Solubility of NaCl decreases. Because of the increase in Cl- ions from the HCl , common ion effect takes place and ionisation of NaCl decreases reducing its solubility. Hence, correct answer is (D).
But-1-ene and cyclobutane exhibit :
But-1-ene and cyclobutane exhibits ring chain isomerism.
Which of the following is used in paints?
It is a thermosetting plastic. It is obtained by condensation of ethylene glycol and phthalic acid or glycerol and phthalic acid. When its solution in a suitable solvent is evaporated, it leaves a tough but non-flexible film. It is, therefore, used in the manufacture of paints and lacquers.
Which of the following statement is correct with respect to property of elements with an increase in atomic no. in the carbon family?
In carbon family, C and Si show +4 oxidation state. The remaining elements of this group, i.e., Ge, Sn and Pb, however show two oxidation states +2 and +4 due to inert pair effect which arises due to ineffective shielding of the valence s-electrons by the intervening d- or f-electrons. Evidently, as the number of d and f-electrons increases down the group from Ge to Pb, the inert pair effect becomes more and more prominant. As a result, the stability of +4 oxidation state decreases while that of the +2 oxidation state increases from Ge to Pb.
A non-volatile electrolyte dissolved in an aqueous solution in same molal proportion as non-electrolyte produces
Which of the following alkali metals has the highest tendency for the half cell reaction?
M(g) → M(g)+ + e-
As the given reaction is oxidation reaction and lithium has highest oxidation potential, so it has highest tendency for this half reaction.
Chloro ethane reacts with X to form diethyl ether. What is X
Chloro Ethane Reacts with Z to form→ Di-Ethyl Ether
C₂H₅Cl + C₂H₅ONa →→ C₂H₅-O-C₂H₅ + NaCl
(Chloro-Ethane) + Sodium Ethoxide → Di-Ethyl Ether +Sodium Chloride
so, Z is Sodium Ethoxide
Which among the following does not exhibit geometric isomerism
Alkenes like 1-hexene when flipped from top to bottom they have identical structures and also they have C=CH2 unit which does not exist as cis- trans isomers.
In colloidal state, particle size ranges from
Which is not amphoteric ?
In chemistry, an amphoteric compound is a molecule or ion that can react both as an acid and as a base. Many metals (such as copper, zinc, chromium, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides.
The IUPAC name of [Ni(NH3)4] [NiCl4] is
As per the rules, the positive ions (cation) whether simple or complex, is named first followed by the negative ion (anion).
Given: . The value of standard electrode potential for the change,
Fe3+ (aq) + e- → Fe2+ (aq) will be
In the following reaction,
the structure of the major product 'X' is
Consider a titration of potassium dichromate solution with acidified Mohr’s salt solution using diphenylamine as indicator. The number of moles of Mohr’s salt required per mole of dichromate is
The reaction of P4 with X leads selectively to P4O6. The X is
The reagent(s) for the following conversion,