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Phenolphthalein turns pink when exposed to substances above a pH of 8.2. This colour change is a result of ionization, which alters the shape and charge of phenolphthalein molecules. This causes it to block the blue light spectrum when exposed to alkaline substances, producing a pink to purple hue.
Profit on selling 40 pens equals selling price of 12 books while loss on selling 40 books equals selling price of 16 pens. Also profit percentage equal...
A shopkeeper sold a jacket for Rs. 3500 at a loss of 30%. At what price should he have sold the jacket, to earn a profit of 25%?
The cost of a piece of diamond varies with the square of its weight. A diamond of Rs.6,084 value is cut into 3 pieces whose weights are in the ratio 3 :...
A shopkeeper bought two articles for Rs. 350 each. If he sold one of them at 40% profit and the other at 40% loss, then find the difference between the ...
A shopkeeper sells an article for Rs 78 and earns double the profit that he would have earned on selling this article for Rs 69. Find the C.P of this ar...
An article is marked (p+15)% above its cost price. While selling the same article (p-20)% discount was given on it. The amount of discount given on the ...
A shopkeeper claims to incur a loss of 20% but uses a weight of 640 grams in place of 1kg If the CP of the rice is Rs 80/kg , what will be the % of a...
A salesman sells a washing machine for Rs 24,000 and gains a profit of 25%. If the production cost is increased by 15%, what should be the new selling p...
Snap deal wishes to gain 35% after allowing 10% discount on the market price to his customers. At what percent higher than the cost price must they mar...
