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