The best method of preparation of alkyl halides is a reaction of alcohol with__________________?
A. Zn / HCI
B. SOCl2 / Pyridine
C. PCI3
D. PCI5
Submitted by :- Jamil Ahmed
In primary alkyl halides the halogen atom is attached to a carbon which is further attached to how many carbon atoms__________________?
A. two
B. three
C. one
D. four
Submitted by :- Jamil Ahmed
Which of the following is not an ore of aluminium?
- Bauxite
- Cryolite
- Monazite
- Mica
Submitted by :- Muhammad Nawaz
Which one of the following molecules does not form alcohol when reacts with Grignard reagent ?
A. formaldehyde
B. propanone
C. acetaldehyde
D. carbon dioxide
Submitted by :- Jamil Ahmed
Which is the third most abundant element in the nature?
- Oxygen
- Aluminum
- Sulphur
- Hydrogen
Submitted by :- Muhammad Nawaz
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
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