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Which of the statement given below are c...

Which of the statement given below are correct ?
(i) Pure dihydrogen 99.5 % is obtained by heating hydrocarbons at 1270 K temperature using Fe catalyst.
(ii) In acidic medium `H_2O_2` decolourises potassium permanganate solution.
(iii) `Ca^(2+)` and `Mg^(2+)` ions can be precipitated by calgon to soften the hard water
(iv) The strength of 15 volume `H_2O_2` at STP is 45.54 gram.

A

(i),(ii)

B

(ii),(iv)

C

(ii),(iii),(iv)

D

(i),(iii),(iv)

Text Solution

Verified by Experts

The correct Answer is:
C
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Scientists are working hard to develop nuclear fusion reactor Nuclei of heavy hydrogen, _(1)^(2)H , known as deuteron and denoted by D , can be thought of as a candidate for fusion rector . The D-D reaction is _(1)^(2) H + _(1)^(2) H rarr _(2)^(1) He + n+ energy. In the core of fusion reactor, a gas of heavy hydrogen of _(1)^(2) H is fully ionized into deuteron nuclei and electrons. This collection of _1^2H nuclei and electrons is known as plasma . The nuclei move randomly in the reactor core and occasionally come close enough for nuclear fusion to take place. Usually , the temperature in the reactor core are too high and no material will can be used to confine the to plasma for a time t_(0) before the particles fly away from the core. If n is the density (number volume ) of deuterons , the product nt_(0) is called Lawson number. In one of the criteria , a reactor is termed successful if Lawson number is greater then 5 xx 10^(14) s//cm^(2) it may be helpfull to use the following boltzmann constant lambda = 8.6 xx 10^(-5)eV//k, (e^(2))/(4 pi s_(0)) = 1.44 xx 10^(-9) eVm Assume that two deuteron nuclei in the core of fusion reactor at temperature energy T are moving toward each other, each with kinectic energy 1.5 kT , when the seperation between them is large enough to neglect coulomb potential energy . Also neglate any interaction from other particle in the core . The minimum temperature T required for them to reach a separation of 4 xx 10^(-15) m is in the range

Scientists are working hard to develop nuclear fusion reactor Nuclei of heavy hydrogen, _(1)^(2)H , known as deuteron and denoted by D , can be thought of as a candidate for fusion rector . The D-D reaction is _(1)^(2) H + _(1)^(2) H rarr _(2)^(1) He + n+ energy. In the core of fusion reactor, a gas of heavy hydrogen of _(1)^(2) H is fully ionized into deuteron nuclei and electrons. This collection of _1^2H nuclei and electrons is known as plasma . The nuclei move randomly in the reactor core and occasionally come close enough for nuclear fusion to take place. Usually , the temperature in the reactor core are too high and no material will can be used to confine the to plasma for a time t_(0) before the particles fly away from the core. If n is the density (number volume ) of deuterons , the product nt_(0) is called Lawson number. In one of the criteria , a reactor is termed successful if Lawson number is greater then 5 xx 10^(14) s//cm^(2) it may be helpfull to use the following boltzmann constant lambda = 8.6 xx 10^(-5)eV//k, (e^(2))/(4 pi s_(0)) = 1.44 xx 10^(-9) eVm Assume that two deuteron nuclei in the core of fusion reactor at temperature energy T are moving toward each other, each with kinectic energy 1.5 kT , when the seperation between them is large enough to neglect coulomb potential energy . Also neglate any interaction from other particle in the core . The minimum temperature T required for them to reach a separation of 4 xx 10^(-15) m is in the range

KUMAR PRAKASHAN-HYDROGEN-Section-C (MCQs asked in Board Exams )
  1. Which elements does not give Hydride ?

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  2. Which substance is called as a calgon for business purpose ?

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  3. Classification of hydride according to Lewis structure is ………

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  4. What is the grade of H2O2 whose concentration is 3.125m for selling in...

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  5. Give molarity and strength % w/v accordingly in 30 volume of H2O2 solu...

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  6. Which of the following products is obtain when ethene react with hydro...

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  7. Which of the following is used in Ion Exchange method as a lon Exchang...

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  8. CH3OH((l)) underset"673 K"overset"50 bar"to CO((g)) + 2H(2(g)) Which...

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  9. The concentration of OH^- in water at 298 K

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  10. When zinc pieces are added to concentrated NaOH solution, H(2(g)) is f...

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  11. Which of the following compound is used to understand the reaction mec...

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  12. Assertion: The relative proportion of Tritium and Protium is 1: 10^17 ...

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  13. Which of the statement given below are correct ? (i) Pure dihydrogen...

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  14. Among the elements In, Ti, TI and Ca which element do not form hydride...

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  15. What is the -O-O-H bond angle in solid form of H2O2 ?

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  16. Dihydrogen and alkli metals resemble in which of the following propert...

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  17. Which ion is displaced by Na^+ ions when hard water is passed over Zeo...

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  18. What is added as stabilizer to aqueous solution of H2O2 ?

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  19. Choose the correct option. T stands for True and F stands for False. ...

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  20. Which of the following is correct matching of column-A with column-B:

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