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mnsoomro
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For which mechanisms the first step involved is the same ?
A. E1 + E2 B. E2 + SN2 C. E1 and SN1 D. SN1 and SN2 Submitted by :- Jamil…
Which is/are physical methods for ore concentration?
Gravity seperation Magnetic separation Froth floatation method All of these Submitted by :- Muhammad Nawaz
SN2 reaction can be best carried out with__________________?
A. primary alkyl halide B. secondary alkyl halide C. tertiary alkyl halide D. all Submitted by :- Jamil Ahmed
When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is _________________?
A. propane B. propanal C. propanoic acid D. propanol Submitted by :- Jamil Ahmed
Which is a nitrogenous fertilizer?
Calcium ammonium nitrate Ammonia sulfate Urea All above Submitted by :- Muhammad Nawaz
When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ?
A. 2 moles of ethane B. 1 mole of ethane C. 2 moles of butane D. 1 mole of butane…
Which is the most effective pesticide?
Organophosphates Carbamates Organochlorines All of these Submitted by :- Muhammad Nawaz
Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?
A. CH3-X B. (CH3)3 C-CH2 – X C. (CH3)2 CH – X D. (CH3)3 C – X Submitted by :-…
Which of the following is green manure/ bio fertilizer?
Oat Rice Sesbania Maize Submitted by :- Muhammad Nawaz
Which one is not a nucleophile ?
A. C2H5O- B. SCN- C. NH3 D. H3C+ Submitted by :- Jamil Ahmed