Atomic mass of an atom is present in the __________?

Related Mcqs:

1. Atom with higher atomic number produces X-rays of__________________?

   A. Shorter wavelength
   B. Larger wavelength
   C. X-ray not produced
   D. All are possible

2. The atomic radii decreases by increasing atomic number in________________?

   A. Alkali metal
   B. Alkaline earth metal
   C. Elements from Li to Ne
   D. Halogens

3. The number of isotopes of elements with even mass number and even atomic number are ________________?

   A. 280
   B. 300
   C. 154
   D. 54

4. The atoms of same element having same atomic number but different mass number are called____________________?

   A. Isobars
   B. Isomers
   C. Isotopes
   D. Isotropes

5. 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

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. 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

8. The valency of carbon Atom is __________ ?

   A. 1
   B. 2
   C. 3
   D. 4

   Submitted by: Rashid Mehmood

9. In water, Hydrogen is present ________by mass.

   A. 22%
   B. 11.11%
   C. 31.13%
   D. 15.15%

   Submitted by: Aamir khan Hullio

10. The maximum mass is present in 1dm3 for the following gas at STP.

    A. C₃H₈
    B. CO₂
    C. CO
    D. CS₂

    Submitted by: Aamir khan Hullio