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The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg.?
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. 
Which of the following statement is/are not true for the green revolution in India? (A) Green Revolution ensured that there was no regional disparity. (B) Green Revolution ensured increased productivity among selected crops. (C) Green Revolution ensured uniform earnings among all farmers. (D) Green Revolution ensured mechanization in farms.  Choose the correct answer from the options given below:
The proposition ‘All leaves are green’ is equivalent to which of the following propositions? 1.No leaves are green 2.No leaves are non-green 3.No leaves are in other colour than green 4.No green is leaf Select the correct answer from the option given below:
Below is the list of colors nominated as the favorite colors by students of class I. Determine the color which has frequency 9. red, blue, red, yellow, green, yellow, green, yellow, yellow, red, green, red, blue, red, yellow, red, blue, yellow, red, blue, blue, yellow, yellow, green, green
In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas solute C is soluble in both the solvents. The extraction process attains equilibrium. The equilibrium relationship between the two phases is Y* = 0.9X, where Y* is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct answer.
In the following question below some statements are given followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusions logically follows the given statements. Statements: No solution is mixture. Each solvent is solute. All solute are solution. Conclusions: I. No solvent is mixture. II. Some solution is solvent. III. Some solute is mixture. 
Six persons P, Q, R, S, T and U like one shirt among six different colour shirt – Red, Black, White, Pink, Blue and Green, but not necessarily in the same order. R likes black colour shirt. P does not like Blue and Green colour shirts. T likes white colour shirt. U does not like Green, Pink and Blue colour shirts. Green colour shirt is not liked by S. Which of the following statement is correct?
If Y which is ratio of mass of solvent to mass of solvent in liquid free phase: For extract is 0.5 (YD) For extract leaving stage N is 0.7 (YVN) Amount of extract is 100kg (D) Amount of solvent in cascade is 50 (SD) What is the extract reflux?
If Y which is ratio of mass of solvent to mass of solvent in liquid free phase: For extract is 0.5 (YD) For extract leaving stage N is 0.7 (YVN) Amount of extract is 200kg (D) Amount of solvent in cascade is 50 (SD) What is the extract reflux?