The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is___________?

Related Mcqs:

1. If a compound contains 24 gram of carbon 2 gram of hydrogen and 64 gram of oxygen then its empirical formula will be________?

   A. C2H2O4
   B. CH2
   C. CH2O
   D. CHO2

   Submitted by: Raza Samejo

2. A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?

   A. 74% Fe
   B. 75% Fe
   C. 77% Fe
   D. 78% Fe

   Submitted by: Muhammad Ali Kunbhar

3. Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?

   A. one / seventeen
   B. sixteen / seventeen
   C. one / three
   D. two / three

4. The number of peaks obtained in mass spectrometry shows____________________?

   A. Relative abundance
   B. Average mass of element
   C. Number of isotopes
   D. Relative isotopic mass

5. When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ?

   A. phenol is unsaturated
   B. 2-bromophenol is insoluble in water
   C. a hydroxy group makes the benzene ring more susceptible to electrophilic attack
   D. acid-base reaction

6. Mass spectrometer is used to determine Mass number of isotopes and___________________?

   A. Atomic number
   B. Relative abundance
   C. Electronic configuration
   D. All of the above

7. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in__________?

   A. 1.8 gram of H₂O
   B. 12 moles of KMnO₄
   C. 0.6N H₂SO₄
   D. 4.6 gram of C₂H₅OH

   Submitted by: Muhammad Ali Kunbhar

8. The heat energy produced when the human body metabolises 1 gram of fat is__________?

   A. 30 KJ
   B. 1 KJ
   C. 39 KJ
   D. 29 KJ

   Submitted by: Muhammad Ali Kunbhar

9. Energy of activation for backward reaction is less than forward reaction for ___________ reactio?

   A. Endothermic
   B. Exothermic
   C. Moderate
   D. Fast

10. What will be the order of reaction of a reaction whose rate can be expressed as R = K [A] [B] ?

    A. Zero
    B. One
    C. Two
    D. Three