Q. 174.4( 13 Votes )
What is the difference between aqueous and non-aqueous solution?
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How much water should be mixed with 12 ml of alcohol so as to obtain 12% alcohol solution?Lakhmir Singh & Manjit Kaur - Chemistry
A 15% alcohol solution means:
(a) 15 ml alcohol and 85 ml water.
(b) 15 ml alcohol and 100 ml water.
Choose the correct answer.Lakhmir Singh & Manjit Kaur - Chemistry
What do you understand by the statement “the solubility of copper sulphate in water at 20°C is 20.7 g’?Lakhmir Singh & Manjit Kaur - Chemistry
(a) Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not?Lakhmir Singh & Manjit Kaur - Chemistry
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.Lakhmir Singh & Manjit Kaur - Chemistry
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.
(a) What type of change occurs when solid A is dissolved in water? Why?
(b) What type of change occurs when sold D is dissolved in water? Why?
(c) Name a metal which you think could behave like solid A. Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.Lakhmir Singh & Manjit Kaur - Chemistry
Tincture of iodine has antiseptic properties. This solution is made by dissolving:Lakhmir Singh & Manjit Kaur - Chemistry
Which one of the following is not a chemical change?Lakhmir Singh & Manjit Kaur - Chemistry
Which of the following represents the solubility of sugar in water at 20°C?Lakhmir Singh & Manjit Kaur - Chemistry