Which of the following cannot give iodometric titration?
IUPAC name of is
The reacting ion in the nitration of benzene is
Which of the following has maximum unpaired d-electrons?
A Carnot engine receives heat at 227oC and exhausts at 47oC. If its efficiency is to be increased by 5 % then the engine should receive heat at
Which one of the following would you expect to have highest electronegativity?
The electronegativity values for the representative elements increase along a period from left to right. Sulphur is situated at the left of the periodic table. Thus it has highest electronegativity among the given elements. The order of electronegativity:
Mg (1.2) < B (2.0) < Te (2.01) < S (2.5) .
Cerium (Z=58) is an important member of lanthanoids. which of the following statement about cerium is incorrect?
In the reaction
Cu(s) + 2Ag⁺(aq) → Cu2⁺(aq) + 2Ag(s),
the reduction half cell reaction is
When CO is passed over solid NaOH heated to 200oC, it forms
The structure and hybridization of Si(CH₃)₄ is
Bleaching action of bleaching powder is due to the liberation of
On account of the formation of nascent oxygen, it shows oxidising and bleaching properties.
Coloured Matter +(O)⟶ Colourless product
Hence, option C is correct.
CO₂ on reaction with ethyl magnesium bromide gives
Ethyl bromide does not react with CO2 but Ethyl Magnesium Bromide (Grignard Reagent) does.
CH3CH2MgBr + CO2 (dry ice) ⇒ CH3CH2COOH (acetic acid)
in presence of ether
Ethyl magnesium bromide (grignard reagent) reacts with solid CO2 (dry ice) in ether solvent, to form acetic acid.
An organic compound having molar mass 60 g mol⁻1 found to contain C = 20%,H = 6.67% and N = 46.67% ,rest being oxygen.on heating it gives NH₃ along with solid residue.The solid residue gives violet colour with alkaline copper sulphate solution.The compound is
Oxidation number of S in S₂O₃2⁻ is