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A bar tender replaces some quantity of alcohol having 40% concentration with water and thus the concentration of alcohol changes to 30%. If the alcohol which he replaced is mixed with another sample of 260 ml alcohol having 20% concentration, then a mixture having 27% concentration of alcohol is prepared. Find the initial quantity of alcohol having 40% concentration.
Two cans of equal volume contains mixture of alcohol and water. In first can, the ratio between the alcohol and water is 3 ∶ 7 and in second can, the ratio between the alcohol and water is 2 ∶ 3. When two cans mixed together, find the ratio of alcohol and water in mixture.
A diluted alcohol contains 16L of alcohol and rest is water. A new mixture in which the concentration of alcohol is 30% is to be prepared by replacing diluted alcohol. How many litres of the mixture shall be replaced with pure alcohol if there was initially 64L of water in the mixture.
Which of the following statements is incorrect regarding preparation of alcohols? give primary alcohol and secondary alcohol respectively b) Ketones on reaction with Grignard’s reagent gives tertiary alcohol c) Aldehydes on reaction with Grignard’s reagent gives primary or secondary alcohol d) Alkyl halides on reaction alcoholic potash gives alcohol
A solid-oxide fuel cell is fed with carbon monoxide and reacts with air to produce CO2. This reaction will produce 2 electrons which are used to power an electric circuit external to the fuel cell. The reaction equation is shown below: 2CO(g) + O2(g) -> 2CO2(g) ΔHr° = -565.96 kJ/mol This reaction does not occur for other types of fuel cells which use a catalyst, such as polymerelectrolyte membrane or phosphoric-acid fuel cells. The presence of carbon monoxide on the anode side of these types of fuel cells will cause catalyst poisoning, reducing the efficiency and voltage of the fuel cell. Determine the rate of enthalpy change for a carbon dioxide production rate of 208 mol/hr. The extent of the reaction occurring in the fuel cell can be obtained by the following equation: where:
The pie chart given below shows the fuel consumption by five vehicles V1, V2, V3, V4 and V5. In a month total fuel consumption by all five vehicles is 720 litre. Fuel consumption of a particular vehicle is shown in terms of degree with respect to the total fuel consumption by all these five vehicles. J1 = Difference between the fuel consumption of V4 and V5. J2 = Difference between the fuel consumption of V1 and V2. What is the value of J2 – J1?
A mocktail ‘x’ has alcohol and water in the ratio 3 : 2. Another mocktail ‘y’ has alcohol and water in the ratio 7 : 4. If x and y are mixed in the ratio 18 : 11, then what will be the ratio of water to alcohol in the final ratio?
When 8 litres of water and 2 litres of alcohol are added to 10 litres of alcohol- water mixture, the ratio of alcohol and water in the mixture becomes 3 ∶ 7. Find the ratio of alcohol and water in the initial mixture.
There are two containers contain a mixture of wine, water and alcohol. The first container contains wine, water and alcohol in the ratio of 4 : 3 : 3. The second container contain wine, water and alcohol in the ratio of 1 : 2 : 1. If 1 litre from first and 4 litres from second are mixed into the third container. What fraction of alcohol in third container?
Two alcohol-water mixtures A and B of ratio 5 ∶ 1 and 5 ∶ 2 respectively are mixed together in the ratio 3 ∶ 4. On adding 2 ml of alcohol to this mixture, 100 ml of final alcohol-water mixture is obtained. What is the percentage of alcohol in the final mixture?