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A certain gas takes four times as long a...

A certain gas takes four times as long as to out as to effuse helium. Its molecular mass will be

A

8u

B

16u

C

32 u

D

64 u

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AAKASH INSTITUTE ENGLISH-TEST 7-Exercise
  1. Which of the following ions is largest in size?

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  2. Electron deficient species among the following is

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  3. A certain gas takes four times as long as to out as to effuse helium. ...

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  4. Four moles of an ideal gas expanded spontaneously in vacuum. The work ...

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  5. If at 77°C, enthalpy of fusion of a compound is 140 kJ/mol then the en...

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  6. (Kp/Kc) for the given equilibrium is [PCl5 (g) hArrPCl3(g) + Cl2 (g)]

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  7. Which of the following equimolar aqueous solution of hydroxides will h...

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  8. Compound which cannot act as a reducing agent is

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  9. The volume of oxygen gas liberated at NTP from 30 mL of 20 (V H2O2), s...

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  10. Among given ions, maximum mobility in aqueous solution is of

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  11. Which of the following is a neutral oxide?

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  12. Which amongst the following is the most stable carbocation?

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  13. In case of bromination to benzene in the presence of FeBr3, the electr...

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  14. The gas leaked from a storage tank of the Union Carbide plant in Bhopa...

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  15. (3.011 x 10^23) molecules of sugar are present in 200 mL of its soluti...

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  16. The orbital angular momentum of an electron which is present in p orbi...

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  17. What is the maximum number of orbital(s) that can be associated with t...

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  18. Correct order of electron affinity of elements F. O, N and Be is

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  19. Which of the following molecules has maximum dipole moment?

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  20. In which of the following species central atom is notsp^3 hybridized?

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