Class 11

In this post, you will find the questions and answers of chapter s block elements including NCERT questions. 1. What are the common physical and chemical features of alkali metals? Answer: Physical properties of alkali metals: (a) Alkali metals have low ionization enthalpies. (b) Alkali metals are highly electropositive in nature. (c) Alkali metals exhibit +1

In this post, you will find the questions and answers of chapter Hydrogen including NCERT questions. 1. Justify the position of hydrogen in the periodic table on the basis of its electronic configuration. Answer: Hydrogen has been placed at the top of the alkali metal in group, but it is not a member of the group.Its

In this post, you will find the questions and answers of chapter Structure of atom which included NCERT exercise also. 1. (i) Calculate the number of electrons which will together weigh one gram.(ii) Calculate the mass and charge of one mole of electrons. Answer: (i) Mass of an electron = 9.1 × 10-28 g 9.1 × 10-28 g

In this post you will find Environmental Chemistry question and answer, including NCERT questions. 1. Define environmental chemistry? Answer: Environmental Chemistry is the branch of science which deals with the chemical changes in the environment. It includes our surroundings such as air, water, soil, forest etc. 2. Explain the tropospheric pollution in 100 words? Answer: Tropospheric pollution