Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?
A. primary alcohol
B. secondary alcohol
C. tertiary alcohol
D. dihydric alcohol
Submitted by :- Jamil Ahmed
CHEMISTRY
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Which one of the following species is not an electrophile?
A. NH3
B. Br+
C. H+
D. BF3 (more…)
Submitted by :- Jamil Ahmed
Which is the second anciently known metal?
- Copper
- Nickel
- Silver
- Gold
Submitted by :- Muhammad Nawaz
The ether used in Wurtz synthesis is__________________?
Which ore is/are used for Hg extraction?
- Cinnabar
- Zinc blende
- Calamine
- All of these
Submitted by :- Muhammad Nawaz
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
Submitted by :- Jamil Ahmed
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 Ahmed
Alkyl halides undergo a type of reaction_________________?
A. Nucleophilic substitution
B. Nucleophilic addition
C. Elimination
D. both A & C
Submitted by :- Jamil Ahmed