Answer: The correct answer is option (b).
Explanation:
A cycle in science is defined as process or phenomena which reoccurs again after a certain interval of a time.
In a set of chemical reactions where reactant is regenerated as a product in the end. This regenerated reactant will again establish the same set of chemical reactions in a same the fashion continuously.
Krebs cycle: it is cycle which occurs during in cellular respiration which starts from acetyl-Co-A enzyme. In the end of cycle energy is released with regeneration of acetyl-Co-A enzyme which will further continue the cycle.
Calvin cycle: It is cycle which occurs in chloroplast during the process of photosynthesis which starts from carbon-dioxide. In the end sugar molecule is released with regeneration of carbon-dioxide molecule which will further continue the cycle.
Hence, Krebs cycle and Calvin cycle both are cycles of chemical reaction in which start over continually.
Hydrogen chloride or most commonly known as hydrochloric acid and
muriatic acid is a diatomic compound that consists of hydrogen and chlorine. It
is prepared industrially by the combustion of hydrogen, H2, in chlorine, Cl2.
H2 + Cl2 -> 2HCl. There are also many metallic chlorides that release
hydrogen chloride gas, HCl, when warmed with concentrated sulfuric acid, H2SO4.
Mostly, it is prepared by heating it with sulfuric acid and sodium chloride.
The reaction is NaCl + H2SO4 -> HCl + NaHSO4. Adding sulfuric acid enables the reaction to proceed further and it acts as a catalyst in the reaction.
Salt - Na Cl
Sodium(metal) and chloride(nonmetal)
Convection currents drive the movement of Earth's rigid tectonic plates in the planet's fluid molten mantle. In places where convection currents rise up towards the crust's surface, tectonic plates move away from each other in a process known as seafloor spreading
The first one is the correct answer
