The Lewis diagram above shows ethene (C2H4), which has two carbon-to-carbon bonds. The strength of the two carbon-to-carbon bonds in ethene is equal. This is because both carbon atoms in ethene are sp2 hybridized, which means that they each have three sp2 hybrid orbitals and one unhybridized p orbital. The sp2 hybrid orbitals are used … Read more
Why is it forbidden to preserve foods with formalin? Formalin is a solution of formaldehyde in water. It is a colorless, pungent liquid with a sharp odor. Formalin is a common fixative, which means that it is used to preserve tissues and cells. It works by cross-linking proteins, which stabilizes the tissue architecture. However, formalin … Read more
Why is it not appropriate to use excessive ethylene to ripen fruits? There are a few reasons why it is not appropriate to use excessive ethylene to ripen fruits: It can damage the fruit. Ethylene is a plant hormone that plays a role in fruit ripening. However, too much ethylene can cause the fruit to … Read more
How does formalin work? Formalin is a solution of formaldehyde in water. It is a colorless, pungent liquid with a sharp odor. Formalin is a common fixative, which means that it is used to preserve tissues and cells. It works by cross-linking proteins, which stabilizes the tissue architecture. When formalin comes into contact with tissue, … Read more
Why is lactating cow fed calcium carbonate? The main component of milk is calcium. A lot of calcium comes out of a cow’s body milk. This can cause a deficiency of calcium in the cow’s body. So, the cow is fed calcium carbonate to overcome this deficiency. Lactating cows are fed calcium carbonate because they … Read more
Which statement must be mentioned in explaining why amphipathic molecules line up at a water surface? The following statement must be mentioned in explaining why amphipathic molecules line up at a water surface: Amphipathic molecules line up at a water surface because of their dual nature: they have both hydrophilic (water-loving) and hydrophobic (water-hating) regions. … Read more
State Aufbau principle While entering into different energy levels, electrons enter first into the lowest level. After the lower energy level is filled electrons enter successively into higher energy levels.
Explain the dynamic nature of chemical equilibrium. In a reversible reaction, if the rate of forward reaction and backward reaction becomes equal, it is said to have reached a state of equilibrium. Since at the state of equilibrium, the rate of the forward reaction and the backward reaction remains equal, the reactions appear to have … Read more