A. Na K
B. Mg Ca
C. Li Na
D. Li Ca
Related Mcqs:
- Industrial materials thermal power stations are coated with__________________?
A. Polyester resins
B. Epoxy paints
C. polyamide resins
D. Polyvinyl chloride - The volume occupied by 1.4g CO at S.T.P is___________________?
A. 22.4 dm3
B. 2.24 dm3
C. 1.12 cm3
D. 1.12 dm3 - The molecules of CO2 in dry ice form__________________?
A. Ionic crystal
B. Covalent crystal
C. Molecular crystal
D. Any type of crystal - Which is the unit of (K) rate constant for zero order reaction ?
A. s-1
B. mol dm-3 s-1
C. mol-1 dm3 s-1
D. mol-2 dm6 s-1 - Which one of the following looks odd__________________?
A. H2SO4
B. KMnO4
C. H2S
D. K2CrO4 - For industrial preparation of CH3CHO catalytic promoter is_________________?
A. PdCl2
B. Cu2Cl2
C. CuCl2
D. PbCl2 - Which element has same isotopes like palladium___________________?
A. Nickel
B. Calcium
C. Cadmium
D. Tin - Bohrs model is contradicted by__________________?
A. Plancks theory
B. Dual nature of matter
C. Heisenbergs uncertainty principle
D. All of these - Which one is not the use of silicones________________________?
A. Lubricant
B. Water repellent film
C. Rubber sheet
D. Medicine - When toluene reacts with chlorine in sunlight the first major product is__________________?
A. Benzy1 chloride
B. Benzal dichloride
C. O-chlorotoluene
D. O-chlorotoluene and P-chlorotoluene
