In Dry cell, cathode is made up of_______?
In Dry cell, cathode is made up of_______?
A. Zinc
B. Carbon (Graphite)
C. ZnCl²
D. MnO²(Pyrolusite)
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__________ is one of the allotropic modifications of carbon.
__________ is one of the allotropic modifications of carbon.A. Silicon
B. Diamond
C. Iodine
D. GraphiteWhich of the following is a soft Coal?
Which of the following is a soft Coal?A. Peat
B. Lignite
C. Bituminous
D. AnthraciteSintered glass is a porous material used for ___________________?
Sintered glass is a porous material used for ___________________?A. absorption
B. adsorption
C. filtration
D. sublimationAccording to Journal of Biological Chemistry 158, human brain and heart are composed of ________water?
According to Journal of Biological Chemistry 158, human brain and heart are composed of ________water?A. 75%
B. 81%
C. 73%
D. 89%According to H.H. Mitchell, Journal of Biological Chemistry 158, the brain and heart are composed of 73% water, and the lungs are about 83% water. The skin contains 64% water, muscles and kidneys are 79%, and even the bones are watery: 31%.
What is the order of kinetics in the SN1 mechanism ?
What is the order of kinetics in the SN1 mechanism ?A. Zero
B. First
C. Second
D. ThirdElements of group IA IIA are _________________?
Elements of group IA IIA are _________________?A. Electronegative
B. Electropositive
C. Neutral
D. IA is electropositive while IIA is electronegative