A) π=n/v RT B) π=nRT C) π=V/n RT D) π=nVRT Correct Answer: A) π=n/v RT Explanation: The equation that represents van’t Hoff general solution equation is π=n/v RT
The equation that represents van’t Hoff general solution equation is
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Chemistry
What will be the minimum pressure required to compress 500 dm3 of air at 1 bar to 200 dm3 at 30°C?
Solution: \[\begin{array}{*{35}{l}} ~P1\text{ }=\text{ }1\text{ }bar \\ P2\text{ }=\text{ }? \\ ~V1=\text{ }500\text{ }dm3 \\ V2=200\text{ }dm3 \\ \end{array}\] As temperature stays steady at...
What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL? (i) 4 mol L-1 (ii) 20 molL-1 (iii) 0.2 molL-1 (iv) 2molL-1
Correct Answer: (iii) 0.2 molL-1 Explanation: The Molarity is defined as the number of moles per volume of the solution in litres. Given, Mass = 5.85g Molar mass = 58.5 g/mol Volume of the solution...
A measured temperature on the Fahrenheit scale is 200 °F. What will this reading be on a Celsius scale? (i) 40 °C (ii) 94 °C (iii) 93.3 °C (iv) 30 °C
Correct Answer: (iii) 93.3 °C Explanation: According to the relationship between the temperature in Fahrenheit and Celsius scale, the temperature on Celsius scale is 93.3 °C.
Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below. The correct reading of mass is 3.0 g. Based on given data, mark the correct option out of the following statements. Student Readings
(i) (ii) A 3.01 2.99 B 3.05 2.95 (i) Results of both the students are neither accurate nor precise. (ii) Results of student A are both precise and accurate. (iii) Results of student B are neither...
Which of the accompanying assertions is right? (I) The presence of responding species in a covered measuring utencil is an illustration of an open framework. (ii) There is a trade of energy just as a matter between the framework also, the environmental elements in a shut framework. (iii) The presence of reactants in a shut vessel made down of copper is an illustration of a shut framework. (iv) The presence of reactants in a canteen jar or some other shut protected vessel is an illustration of a shut framework.
solution: Alternative (iii) is the appropriate response. For a shut vessel made down of copper, regardless of can be traded between the framework and the environmental elements however energy trade...
Why should a magnesium ribbon be cleaned before burning in air?
Answer: Because Magnesium metal combines with ambient oxygen to generate Magnesium Oxide (MgO) layer, which is a very stable chemical, it is recommended that magnesium ribbon be cleaned prior to...
Explain why propanol has a higher boiling point than that hydrocarbon, butane.
Propanol undergoes intermolecular H-bonding due to the presence of the – OH group. Butane, on the other hand, does not have the same advantages. In order to dissolve the intermolecular hydrogen...
What is the activation of adsorbent? How is it achieved?
Activation of adsorbent is the process of increasing the adsorption power of the adsorbent. The following methods are used to activate adsorbents: (I) Increasing the adsorbent surface area. This can...
Why does the reactivity of nitrogen differ from phosphorus?
Nitrogen is a chemically less reactive element because of the high stability of its molecular form ${{N}_{2}}$. In nitrogen molecule, the two nitrogen atoms form a triple bond among themselves....