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mnsoomro
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Which ore is/are used for Zn extraction?
Zincite Zinc blende Calamine All of these Submitted by :- Muhammad Nawaz
Grignard reagent is reactive due to___________________?
A. the presence of halogen atom B. the presence of magnesium atom C. the polarity of C-Mg bond D. all…
Which of the following is/are chemical methods for ore concentration?
Calcination Smelting & leaching Roasting All of these Submitted by :- Muhammad Nawaz
Elimination bimolecular reactions involve____________________________?
A. first order kinetics B. third order kinetics C. second order kinetics D. zero order kinetics Submitted by :- Jamil…
Alkyl halides undergo a type of reaction_________________?
A. Nucleophilic substitution B. Nucleophilic addition C. Elimination D. both A & C Submitted by :- Jamil Ahmed
Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________?
A. primary alcohol B. tertiary alcohol C. secondary alcohol D. dihydric alcohol Submitted by :- Jamil Ahmed
Which of the following is the process of removing matrix/gangue by fusing with flux?
Roasting Sintering Calcination Smelting Submitted by :- Muhammad Nawaz
Which ore is/are used for Pb extraction?
Galena Zinc blende Cinnabar Calamine Submitted by :- Muhammad Nawaz
Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________?
A. they have an electrophilic carbon B. they have an electrophilic carbon & a good leaving group C. they have…
Which of the following ores is/are separated by froth floatation method?
Galena (PbS) Copper pyrite (CuFeS2) Zinc blende (ZnS) All of these Submitted by :- Muhammad Nawaz