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A 60% spirit solution is mixed with r% spirit solution in the ratio 1 : 3 such that a s% spirit solution is obtained. When a (s/3)% spirit solution is mixed with 55% spirit solution in equal ratio, an (r/2)% spirit solution is obtained. Which of the following can be determined? (A) Value of ‘r’ (B) Value of ‘s’ (C) Volume of the 60% spirit solution mixed initially (D) If 9 liters of r% spirit solution was mixed initially, what was the volume of the s% spirit solution thus obtained?
A chemical solution appears green when the salt concentration is 8 grams per litre (gpl) and red when it is 10 gpl. Pure water was added to the solution of 1 litre of 15 gpl solution till it turned green. Then 125 ml of the green solution is taken out and x grams of salt is added to the green solution to make it red. Another 500 ml of the final solution was taken out and y litres of green solution is added to get a resultant solution of concentration 9.6 gpl.  Assume adding salt doesn’t change its volume and find the ratio of x and y. 
The following question have three statements. Study the question and the statements and decide which of the statement(s) is/are necessary to answer the question. An electricity company losses 16% of the supplied electricity in power losses. Find the loss in rupees per day. Statement I: Per unit price of electricity paid by the consumer is Rs. 3.5. Statement II: Daily electricity supply from the company is 1.65 lakh units. Statement III: The cost to the company for every 15000 unit electricity losses is Rs. 14500.
Which of the following statement is correct about Faraday’s Laws of Electrolysis? First Law: The amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte (solution or melt). Second Law: The amounts of different substances liberated by the same quantity of electricity passing through the electrolytic solution are proportional to their chemical equivalent weights (Atomic Mass of Metal ÷ number of electrons required to reduce the cation).
An electric bus has onboard instruments that report the total electricity consumed since the start of the trip as well as the total distance covered. During a single day of operation, the bus travels on stretches M, N, O and P, in that order. the cumulative distances travelled and the corresponding electricity consumption are shown in the Table below: Stretch Cumulative distance(km) Electricity used (kWh) M 20 12 N 45 25 O 75 45 P 100 57 The stretch where the electricity consumption per km is minimum is 
What is the value of the cell constant when the conductance of an electrolytic solution is equal to its conductivity?
Which of the following statement about electrolytic cells are correct? The electrochemical processes are of great importance in the laboratory and the chemical industry.  One of the simplest electrolytic cell consists of two copper strips dipping in an aqueous solution of copper sulfate. 
Which of the following solutions will conduct electricity? (i) Aqueous solution of glucose (ii) Aqueous solution of acetone (iii) Aqueous solution of acetic acid (iv) Aqueous solution of milk of magnesia
Solution X contains 7% (by weight) of liquid M and solution Y contains 14.5% (by weight) of liquid M. If 3 grams of solution X is mixed with 2 grams of solution Y, then liquid M accounts for what percent of the weight of the resulting solution?
100 kg of solution A is mixed with 60 kg of solution B . If solution A has tin and copper in the ratio 1: 4 and solution B has lead and tin in the ratio 3 :2 then what is the amount of tin in the new solution?