Daily NEET MCQ- February 27, 2022 - NEET MCQ

The artificial sweetener containing chlorine that has the appearance and taste as that of sugar and is stable at cooking temperature is sucralose. 

Sucralose is derived from sugar through a multi-step patented manufacturing process that selectively substitutes three atoms of chlorine for three hydroxyl groups on the sugar molecule. This change produces a sweetener that has no calories, yet is 600 times sweeter than sucrose. 

Chemical formula of sucralose is C₁₂H₁₉Cl₃O₈.
Hence, the correct option is (C).

During an injury, if nasal septum gets damaged, hyaline cartilage is perfused for its recovery.

Nasal septum separates the left and right airways in the nose, dividing the two nostrils. It is composed primarily of hyaline cartilage, which is densely packed with collagen. Hyaline cartilage is found lining articular surfaces, and in the nasal septum, tracheal rings, costal cartilages and the epiphyseal cartilage of growing bones. So, if the nasal septum is damaged, for its recovery, hyaline cartilage will be perfused.

Hence, the correct option is (A).

No change. The focal length of a concave mirror does not depend on the nature of the medium. Therefore, the focal length of the mirror, even after holding it in water, will remain the same.

Polarity occurs between two entities when there is a difference in the magnitude and signs of charges between the two entities. In this case, the halogen is more negatively charged than the carbon, and hence it is polarised.

Apomixis (asexual seed formation) is the result of a plant gaining the ability to bypass the most fundamental aspects of sexual reproduction: meiosis and fertilization.  Without the need for male fertilization, the resulting seed germinates into a plant that develops as a maternal clone. 

Hence, the correct option is (D).

Darwin studied the flora and fauna of Galapagos Islands, a chain of islands on the west coast of South America. There he found an amazing range of creatures existing. He found that there were many varieties of small blackbirds in these islands which differed mainly in the shape of beaks and feeding habits. These varieties of small blackbirds were later called Darwin's Finches. After analyzing them, he realized that all of these varieties evolved on the same island itself and were not from separate areas. He conjectured that these varieties evolved from the original seedeating ancestor bird which was present in South America. Some of them flew to these islands and according to the needs of different environments, they developed different shapes of beaks and feeding habits. Some became insect-eating, some fruit-eating, some cactus eating, etc.

Hence, the correct option is (A).

The concave mirror with a smaller aperture forms the sharper image because it is free from spherical aberration. So, even though both have the same focal length, the change of aperture affects the formation of the image.

Iodine lies below bromine, chlorine and fluorine in the halogen group and hence has the largest atomic size.

The upper part of the mirror is convex. The middle part of the mirror is concave. The lower part of the mirror is plane. The image formed by a plane mirror will not have any changes, whereas that will not be the case for concave and convex mirrors.

The size of Cl atom is smaller than the size of Br atom as the latter appears lower than Cl in the halogen group. Hence, the carbon-halogen bond length of C-Br must be bigger than that of C-Cl, i.e., 178pm, therefore it must be 193pm.