The metal, which is a constituent of vitamin B12 is____________?
The metal, which is a constituent of vitamin B12 is____________?A. Iron
B. Magnesium
C. Zinc
D. Cobalt
B. Magnesium
C. Zinc
D. Cobalt
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What is the main component of bones and teeth?
What is the main component of bones and teeth?
A. Calcium carbonate
B. Calcium phosphate
C. Calcium sulphate
D. Calcium nitrateCarbon,Diamond and Graphite are together called:___________?
Carbon,Diamond and Graphite are together called:___________?A. Allotrope
B. Isomers
C. Isomorphs
D. IsotopesThe term allotrope refers to one or more forms of a chemical element that occur in the same physical state. … Allotropes may display very different chemical and physical properties. For example, graphite and diamond are both allotropes of carbon that occur in the solid state
Silver fish is the name of__________?
Silver fish is the name of__________?A. Insect
B. Fish
C. Bird
D. MammalHailey’s comet is visible after every_________?
Hailey’s comet is visible after every_________?
A. 84 years
B. 76 years
C. 1000 years
D. 365 yearsRadioactive isotope of Uranium used in Nuclear Bomb is ?
Radioactive isotope of Uranium used in Nuclear Bomb is ?
A.92 U 235
B.92 U 234
C. 92 U 233
D. 92 U 238A seed can germinate in the absence of__________?
A seed can germinate in the absence of__________?A. Oxygen
B. Light
C. Moisture
D. Temperature