Question

SM 1) State true or false. i) The d block elements are called transition elements. ii) Glucose combines with oxygen in our body and provide energy. The reaction is an endothermic reaction. iii) In a material medium, speed of light depends on the frequency of light,​

Answer 1

Answer:

(¡) True

(¡¡) False

(¡¡¡) False

Explanation:

(¡) The d-block elements are called transition elements because they exhibit transitional behaviour between s-block and p-block elements. Their properties are transitional between highly reactive metallic elements of s-block which are ionic in nature and the elements of p-block which are covalent in nature.

( ¡¡) Explanation: In the process of respiration, glucose reacts with oxygen in the cells of our body to produce carbon dioxide and water. Large amounts of energy are released during this process. ... Hence, respiration is an exothermic process.

(¡¡¡) So, we can say that the speed of light only depends on the density of the medium in which it is travelling. The speed of light is faster than any other moving object. The speed of light neither depends on the frequency or wavelength. The speed of light is also independent of the velocity of the source.