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Chapter - 2 Is Matter Around us Pure MCQs With Answer - Fully Solved 1. Which of the following statements is/are correct? (a) All the constituent particles of a pure substance are the same in their chemical nature. (b) A pure substance consists of a single type of particles. (c) Most of the matter around us exist as mixtures of two or more pure components. (d) All of these Ans : (d) All of these 2. If the components of the substance can be separated by a chemical change only then it is a/an (a) element (b)  compound (c)  mixture (d) none of these Ans :  compound A compound can be separated into its components by chemical means while an element cannot be further separated. A mixture can be separated by physical means. 3. Identify the correct statement(s). (a) Mixtures which have a uniform composition throughout are called homogeneous mixtures or solutions. (b) A homogeneous mixture can have a variable composition. (c) Heterogeneous mixtures have non-uniform compositions. (...

Animal tissue There are several types of animal tissues and these are often grouped together into the four main classes that for many classes are the following:- Every category is further subdivided into different subcategories, that we will discuss later in this article:- 1. Epithelial Tissue :- It is arranged in single or multi-layered sheets. It covers the internal and external surface of the body.Epithelial tissue is not supplied by the blood vessels. It  is classified following into the further sub 5 categories according to the distributions:- A)  Squamous Epithelium:- I ts cells are thin, flat with clear cytoplasm. A single round nucleus is present in the centre.It  is found in the kidney tubules, bowman capsule etc.  B)  Cuboidal Epithelium :- Cells of this Epithelium a long, broad in shape and they appear like a cube. The cytoplasm is also present in this with centrally located nucleus. It is found in the kidney tubules, ducts of the slavery ...