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Doctors Medicines MCQs Q&A

Related Questions

What is the final enthalpy of the solution made by mixing 20 grams of solution A having enthalpy 5 J with 5 grams of solution B having enthalpy 10 J?
What is the final enthalpy of the solution made by mixing 5 grams of solution A having enthalpy 20 J with 15 grams of solution B having enthalpy 40 J?
What is the final enthalpy of the solution made by mixing 100 grams of 10% NaOH having enthalpy 40 J with 300 grams of 90% NaOH having enthalpy 20 J?
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. 
Product X is produced by mixing chemical A and chemical B in the ratio of 5 : 4. Chemical A is prepared by mixing two raw materials, P and Q, in the ratio of 1 : 3. Chemical B is prepared by mixing raw materials, Q and R, in the ratio of 2 : 1. Then the final mixture is prepared by mixing 8640 units of product X with water. If the concentration of the raw material Q in the final mixture is 50%, how much water had been added to product X?
Shyam is a greedy shopkeeper who always cheats in his dealings. He uses a faulty machine which reads 500 grams as 580 grams. A customer bought 500 grams of rice but instead of 500 grams he had to pay for 580 grams. Calculate the profit/loss percent of Shyam if the cost price and selling price of rice is Rs. 20/kg and Rs. 30/kg respectively. 
250 grams of a sweet has 20 grams of cashew and 30 grams of almonds. How many grams of cashew and almonds, respectively, will be there in 350 grams of the same sweet?
A mixture of oils is prepared by mixing two mixtures A and B in the ratio 2 ∶ 1. Mixture A is made by mixing olive oil and jasmine oil in ratio 3 ∶ 1, while mixture B is made by mixing coconut oil and almond oil in ratio 2 ∶ 3. How much jasmine oil and coconut oil is required to prepare 750 ml of the final mixture of oils respectively?
A three-star medicine is prepared by mixing two type of fluids (A & B) in ratio of 1 : 4. Fluid A is prepared by mixing two type of water, water M and water N in ratio of 4 : 5. Fluid B is prepared by mixing two type of water, water X and water N in ratio of 3 : 7. The final mixture is prepared by 675 units of three-star medicine with water Y. If the concentration of the water N in the final mixture is 60%, then how much water Y had been added to three-star medicine?
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?