Barite is an ore of
-
- Ca
- Mg
- Ba
- K
Submitted by :- Muhammad Nawaz
sylvite is an ore of
-
- Ca
- Mg
- Ba
- K
Submitted by :- Muhammad Nawaz
Lime water is an aqueous solution of ______ .
- MgSO3
- Ca(OH)2
- CaCO3
- CaSO4
Submitted by :- Muhammad Nawaz
Ketones are comparatively less reactive than aldehdye. It is due to_______________?
A alkyl groups are electron donating
B. steric hindrance
C. Both A and B
D. none
Submitted by :- Jamil Ahmed
Which of the following do not give aldol condensation reactions
A. formaldehyde
B. acetaldehyde
C. diemthyl ketone
D. propionaldehyde
Submitted by :- Jamil Ahmed
Which of the mentioned elements with excess oxygen to form peroxides?
-
- Ca
- Mg
- Li
- Ba
Submitted by :- Muhammad Nawaz
When calcium is heated in the flame of a Bunsen burner, the color imparted to the flame is
- Golden yellow
- Brick red
- Crimson red
- Grassy green
Submitted by :- Muhammad Nawaz
The most common oxidation state of alkaline earth metals is
- + 1
- +2
- -2
- -1
Submitted by :- Muhammad Nawaz
The wire of flash bulb is made up of
-
- Cu
- Ag
- Mg
- Ba
Submitted by :- Muhammad Nawaz
The formula of bleaching powder is
-
- CaOCl2
- CaClO3
- Ca(ClO3)2
- CaOCl
Submitted by :- Muhammad Nawaz