Question
A 150 ml solution consists of alcohol and water in a
ratio of 2:3. A portion of this mixture is removed, containing 18 ml of water, and then 6 ml of alcohol is added back to the remaining solution. Determine the new ratio of alcohol to water in the final mixture.Solution
Initial quantity of alcohol in the mixture = (2/5) × 150 = 60 ml
So, the initial quantity of water = 150 – 60 = 90 ml
The percentage of water removed = (18/90) × 100 = 20%
Which means 20% of the mixture is removed.
So, the new quantity of alcohol in the mixture = 0.8 × 60 = 48 ml
New quantity of water = 90 – 18 = 72 ml
ATQ, Final quantity of alcohol in the mixture = 48 + 6 = 54 ml
So, the required ratio = 54:72 = 3:4
Which type of farming is prevalent in regions where population pressure on land is very high, often leading to intensive land use and manual labor?
The symbiotic association ,Mycorrhizae help in absorption of:
Ratio of yield of photochemical product to total number of quanta used is called as ___
4 'A' model of rural marketing includes:
Which grade of soil structure indicates very well-formed, durable, and distinct peds?
Which is the most suitable method for preserving flowers with high moisture content like roses and carnations?
 Which phytohormone forms the association between roots and microbes?
Which of the following is the non-physiological oxidant used by Robert Hill known as Hill reagent?
Which insect lays eggs in guava fruits, causing damage and rendering them unmarketable?
The first Indian Cooperative Societies Act was passed in the year:
