Mcq on square and rectangle Q. A rectangular playground of length 125 m and width 75 m, has a walking strip of width 5m in the middle of the ground…

Linear Equations in two variables Q1. If the ratio of the length and breadth of a rectangle is 3:2 and the area is 54 square meters, find the length and…

Problems On HCF And LCM 1. Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case.A. 4B. 7C. 9D.…

Why does the colour of copper sulphate solution change when an iron nail is dipped in it? Copper sulphate crystal is blue. So it is also called “Blue Vitriol”. Refining…

NCERT Solutions for Class 8 Science Chapter 2 Chapter 2 Microorganisms: Friend and Foe Exercise Questions 1. Fill in the blanks. (a) Microorganisms can be seen with the help of…

What is nuclear fission? Nuclear Fission is a type of nuclear reaction in which the splitting of a nucleus into two daughter nuclei takes place. And, because of this energy…

Important Questions on Arithmetic Progression Q1. Check whether – 150 is a term of the AP: 11, 8, 5, 2 . . . Q2. If the 3rd and the 9th…

Why does heat transfer from hot body to cold body The atoms in the hot bodies have higher kinetic energy than those in the cold bodies. So, to maintain thermal equilibrium,…

Important Questions on Squares and Square Roots Q1. Find the smallest number by which 1800 must be multiplied so that it becomes a perfect square. Also find the square root…

Polyvinyl Chloride and its uses Polyvinyl chloride (PVC in short) is a synthetic polymer of plastic. According to a survey, almost 40 million tons of PVC are produced in a…