Daily NEET MCQ- July 20, 2022 - NEET MCQ

When Gibbs free energy is positive, the reaction that occurs is nonspontaneous and a reaction occurs backward that is the products are converted into reactants. Simply the reverse reaction could occur.

Stomata is present both on abaxial and adaxial epidermis. Mesophyll is undifferentiated. Vascular bundles are seen in veins and mid-rib and are surrounded by thick walled bundle sheath. Most of the cells are parenchyma cells.

Buliform cells that help in the curling of leaves are present in monocot leaf. Epidermis covers the entire plant and protects the plant from external damage. Vascular bundles in monocot stem are neither radial nor conjoint. In a monocot stem pericycle is absent.

Pith in monocot stem is made of rigid sclerenchymatous cells. Also, the hypodermis and large number of vascular bundles that are scattered are surrounded by sclerenchymatous cells.

Hypodermis along with the pith of a monocot stem is made of sclerenchymatous cells. Also, several numbers of scattered vascular bundles are surrounded by sclerenchymatous cells.

Bernoulli’s equation can be used for non-viscous, incompressible and steady laminar flow.

After burning Sulphur in the presence of oxygen the formed Sulphur dioxide needs to be reacted with oxygen to form Sulphur trioxide. It is an exothermic reaction and vanadium pentoxide is used as the catalyst.

These days sulphuric acid is mostly prepared by the Contact process. The acid produced by this method is free from arsenic impurities and hence can be safely used for the preparation of edible products.

Sulphuric acid is a Lewis acid and is a dense oily liquid which acts as a strong dehydrating agent due to its high affinity towards water. It chars carbohydrates to from black precipitates of carbon.

The sperm contacts the egg cell at zona pellucida. The zona pellucida then undergoes chemical changes which renders egg insusceptible to further encounters with another sperm. This is essential to ensure that only a single sperm fertilizes the egg.