Question
When hard water is evaporated completely, the white
solid remains in the container. It may be due to the presence of 1. Carbonates of Ca and Mg 2. Sulphates of Ca and Mg 3. Chlorides of Ca and Mg Select the correct answer using the code given below:ÂSolution
The white solid remains in the container when hard water is evaporated completely is mainly due to the presence of carbonates of Ca and Mg and also due to presence of traces of sulphates of Ca and Mg.Â
What is the difference between (in m2) the area of a circular field of radius 35 metres and area of a rectangular piece of land having its di...
There is a carpet of length 20 m. How many small pieces of carpet, each of length 4 m, can be cut out of it?
Find out the volume of a tetrahedron whose side is 6√2 cm³?
An angle is equal to 2/4 of its supplement. The angle is :
Area of a rectangle is equal to the total surface area of a hemisphere having volume 13718 cm³ . Find the perimeter of the rectangle if its length is 1...
A cuboidal water tank with dimensions 32 metres × 22 metres × 28 metres is filled to 40% of its total capacity . The water is then transferred to a cy...
A cone and a cylinder have the same radius and height. If the volume of the cone is 100 cm³, what is the volume of the cylinder?
The ratio of the number of English books to Hindi books in a library shelf is 5:3. If 108 Hindi books are written by Pradeep, which constitutes 36% of t...
The ratio of length to breadth of a rectangle is 5:4, respectively. Perimeter of rectangle is 144 cm. If each side of a square is 25% more than the brea...
The area of a square is 225 cm². The breadth of a rectangle is 20% more, and the length is 50% more than the side of the square. Find the ratio of the ...