For industrial preparation of CH3CHO catalytic promoter is_________________?
A. PdCl2
B. Cu2Cl2
C. CuCl2
D. PbCl2
Chemistry Mcqs
Ethy1 chloride on reduction in the presence of Zn/HCI produces___________________?
Ethy1 chloride on reduction in the presence of Zn/HCI produces___________________?
A. n. butane
B. Ethanol
C. Ethane
D. Diethy1 ether
When CO2 is made to react with ethy1 magnesium iodide in dry ether followed by acid hydrolysis yields______________?
When CO2 is made to react with ethy1 magnesium iodide in dry ether followed by acid hydrolysis yields______________?
A. Carboxylic acid
B. Ethanoic acid
C. Propanoic acid
D. Butanoic acid
Which one of the following will be sulphonated readily ?
Which one of the following will be sulphonated readily ?
A. Chlorobenzene
B. Toluene
C. Nitrobenzene
D. Benzene
When benzene is heated in air with V2O5 at 450°C yields_________________?
When benzene is heated in air with V2O5 at 450°C yields_________________?
A. Phenol
B. Maleic anhydride
C. Glyoxal
D. Benzoic acid
In 1 – pentene -4- yne the carbon exhibit hybridization_________________?
In 1 – pentene -4- yne the carbon exhibit hybridization_________________?
A. sp3 – sp2
B. sp2 – sp
C. sp2 – sp
D. sp3 – sp2 – sp
Which one of the following looks odd__________________?
Which one of the following looks odd__________________?
A. H2SO4
B. KMnO4
C. H2S
D. K2CrO4
The most paramagnetic element is____________________?
The most paramagnetic element is____________________?
A. Iron
B. Cobalt
C. Chromium
D. Manganese
Which molecule has the highest bond energy among the halogens_________________?
Which molecule has the highest bond energy among the halogens_________________?
A. Fluorine
B. Chlorine
C. Iodine
D. Bromine
The most reactive allotropic form of phosphorus is________________?
The most reactive allotropic form of phosphorus is________________?
A. White
B. Redox potential
C. Black
D. Violet