Question
Which of the following acid proves to be useful for the
purification of gold and silver?ÂSolution
Nitric acid is used for purification of various precious metals, including gold, silver, and platinum. In metallurgy, it is used in combination with alcohol for etching designs on metals like brass, copper, bronze, etc.
A and B start a business with investments of ₹50,000 and ₹40,000, respectively. After 6 months, C joins with an investment of ₹60,000. At the end ...
What will come in place of the question mark (?) in the following series?
120, 128, 144, 168, 240
A man invested ₹12,000 in a business, and his partner invested ₹15,000. After 8 months, the first partner withdrew half of his investment. If the t...
If x² – 6x + m > 0 for all real x, find m.
Puneet owns 66 foldable laptops, and Raja has 22 more foldable laptops than Puneet. The ratio of foldable laptops between Raja an...
A sum of Rs. 4,000 becomes Rs. 6,912 in 3 years at a certain rate of interest compounded annually. What is the rate of interest?
Which of the following is an example of utility software?
The ratio of milk and water in a mixture of 28 litres is 4 : 3. Find the quantity of milk in the mixture?Â
