NEET Test 1

Cyanosis is blueness of skin and occurs due to large amount of deoxygenated haemoglobin in cutaneous vessels.

Sporopollenin forms the exine of pollen grain which is resistant to acids, high temperature and radiations. Since today, there is no enzyme found, which could degrade it.

Seminal vesicles are male assessory glands which are tubular in structure. Their secretions partly forms the semen. It also secretes fructose which provides energy to the sperms for motility. Fructose is only produced in human male body.

In gastrulation cell migration occur forming 3 germ layers. The ectoderm gives rise to epidermis, the nervous system, and to the neural crest in vertebrates. The endoderm gives rise to the epithelium of the digestive system and respiratory system, and organs associated with the digestive system, such as the liver and pancreas. The mesoderm gives rise to many cell types such as muscle, bone, and connective tissue. In vertebrates, mesoderm derivatives include the notochord, the heart, blood and blood vessels, the cartilage of the ribs and vertebrae, and the dermis

Interestitial lung disease are a group of rare lung conditions that cause breathlessness. The major problem is inflammation of lung tissue which leads to fibrosis of air sacs that interferes with the ability of the lungs to deliver oxygen.

Tuberculosis is a bacterial respiratory disease considered to be fatal, but its cure is possible. Asthma, cystic fibrosis, acute respiratory distress syndrome (ARDS) are of the incurable respiratory diseases.

Respiratory dysfunction occurs in patients with multiple sclerosis and manifest as acute or chronic respiratory failure, disordered control of breathing, respiratory muscle weakness, sleep disordered breathing, or neurogenic pulmonary edema.

Seasonal asthma attacks can occur due to pollen grains released in certain months like March- April or August- September.

A carbon monoxide measure of about 0.7 mm Hg (concentration of about 1%) in alveolar air can be lethal.

From the above anions, NO₂^- , S^2- and Cl^- will undergo oxidation and reduce KMnO₄ to Mn²⁺. While, CO₃^2- has no reaction with KMnO₄, so it will not decolourize KMnO₄ solution.

As more the s character in the hybrid orbital, more the electronegativity. Hence, correct order regarding the electronegativity of hybrid orbitals of carbon will be 

sp> sp² > sp³ 

because in sp =50% s character 

sp²=33.3% s character 

sp³ = 25% s character

Perkin Reaction:- 

Used to make Cinnamic acids, it gives an α,β- unsaturated aromatic acid by the aldol condensation of an aromatic aldehyde and an acid anhydride, in the presence of an alkali salt of the acid.

Number of electrons in 1 water molecule= 10 

Hence, in 3.6ml of water, Number of electrons= 6.022 × 10²³ × 0.2 × 10= 12.044 × 10²³