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In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst
In this question, three statements are given followed by four conclusions. Choose the Conclusion(s) which best fit(s) logically. Statements : 1) All gold are platinum. 2) Some platinum are silver. 3) All silver are diamonds. Conclusions : I. Some diamonds are platinum. II. Some diamonds are gold. III. Some silver are gold. IV. Some platinum are diamonds.
The owner of PC Jewellers has a brick of 38 pt. platinum and 19 pt. platinum. He wanted to obtain a brick of 30 pt. platinum, weighing 190 grams by melting these 2 bricks. Find how much of each must be melted to obtain the required bar? (Given: pure platinum is 95 pt.)
A cinema house has 600 people. \(26\frac{2}{3}{\rm{\% }}\) People buy premium tickets and \(33\frac{1}{3}{\rm{\% }}\) People buy gold tickets and 40% of people buy platinum tickets. Only 5% of people buy both platinum and gold tickets and 10% of people buy both premium and platinum tickets and \(6\frac{2}{3}{\rm{\% }}\) of people buy both premium and gold tickets and 30 people buy all three types of tickets. Find the number of people who buy only one type of ticket.
Severe corrosion of metals occurred when coupled with platinum is due to the higher current density for hydrogen evolution but not due to the reversible potential of the platinum-platinum ion electrode.
The ratio platinum to silver in a bracelet is 5 : 7. If the price of platinum is 1/10th the price of silver, find the cost of the bracelet if the cost of platinum in the bracelet is 24000 rupees.
If the sulfur contains Arsenic which attacks the Vanadium or Platinum catalyst during contact process. Using which of the following can the Arsenic be removed.
একটি লঘু H2SO4 মিশ্রিত 15 15 cm2 আয়তনের 0.3 M KMnO4 দ্রবণ দ্বারা 25 cm3 অায়তনের H2SO4 কে জারিত করে। এ দ্রবণে H2SO4 এর মোলার ঘন মাত্রা কত হবে?
1000 mL 1 N H2SO4   এর দ্রবণ তৈরি করতে 98% H2SO4   এর কত মিলিলিটারের প্রয়োজন হবে? [H2SO4   এর ঘণত্ব = 1.8 g /cc]
Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N₂ & H₂ is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.