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
If the 4-digit number x67y is exactly divisible by 9, then the least value of (x + y) is _____.
- If the perimeter of a square is 104 cm, what will be its area?
A storeroom has only steel and copper rods in the ratio 4:3, respectively and the weight of each steel and each copper rod is in the ratio 5:6, respecti...
A rectangular tank is 50 meter long and 29meter deep. If 1000 cubic meters of water be drawn off the tank, the level of the water in the tank goes down ...
Find the circumference of a circle of radius 7 cm. Take π = 22/7.
If the curved surface area and the radius of a cylinder are 880 cm2 and 10 cm, respectively, then find the volume (in cm3) of the ...
A right circular cylinder having total surface area of 18480 cm2 is immersed in a vessel completely filled with water. If the height of the c...
A cone has a radius of 6 cm and a slant height of 10 cm. What is the approximately surface area of the cone?
A polygon has 104 diagonals, the number of sides of the polygon is?Â
A girl spent 20% of her monthly income on clothing. Of the remaining, she spent on travel and food in the ratio of 3:2. If the difference of the income ...
Relevant for Exams:
