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Total Questions : 1678 | Page 46 of 168 pages
Question 451. Diameter of an atom is in the order of________________?
  1.    0.2m
  2.    0.2mm
  3.    0.2nm
  4.    0.2pm
 Discuss Question
Answer: Option C. -> 0.2nm
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 452. The number of peaks obtained in mass spectrometry shows____________________?
  1.    Relative abundance
  2.    Average mass of element
  3.    Number of isotopes
  4.    Relative isotopic mass
 Discuss Question
Answer: Option C. -> Number of isotopes
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 453. Empirical formula of chloroform is____________________?
  1.    CH2 C12
  2.    CH3C1
  3.    CC14
  4.    CHCL3
 Discuss Question
Answer: Option D. -> CHCL3
CHLOROFORM IS A COLORLESS, SWEET-SMELLING ORGANIC COMPOUND WITH THE IUPAC NAME TRICHLOROMETHANE AND FORMULA CHCL3. CHLOROFORM CAN DAZE OR KNOCK OUT PEOPLE EVEN WHEN IT’S CONSUMED IN SMALL DOSES.
Question 454. Mass spectrometer is used to determine Mass number of isotopes and___________________?
  1.    Atomic number
  2.    Relative abundance
  3.    Electronic configuration
  4.    All of the above
 Discuss Question
Answer: Option B. -> Relative abundance
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 455. Which one of the following has the maximum number of isotopes ?
  1.    oxygen
  2.    carbon
  3.    tin
  4.    chlorine
 Discuss Question
Answer: Option C. -> tin
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 456. Molecular mass of water (18g) means__________________?
  1.    1-mole molecules of water
  2.    1-gram molecule of water
  3.    3-gram atoms
  4.    all
 Discuss Question
Answer: Option D. -> all
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 457. One mole of CO2 contains?
  1.    6.022 x 1023 atoms of oxygen
  2.    22-gram electrons
  3.    6.022 x 1023 atms of carbon
  4.    both B. & C.
 Discuss Question
Answer: Option D. -> both B. & C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 458. Which of the following terms is not used for ionic compound ?
  1.    formula unit
  2.    empirical formula
  3.    molecular formula
  4.    formula mass
 Discuss Question
Answer: Option C. -> molecular formula
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 459. Moles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is______________________?
  1.    0.18 mole
  2.    0.27 mole
  3.    0.24 mole
  4.    0.09 mole
 Discuss Question
Answer: Option A. -> 0.18 mole
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 460. The number of isotopes of elements with even mass number and even atomic number are ________________?
  1.    280
  2.    300
  3.    154
  4.    54
 Discuss Question
Answer: Option C. -> 154
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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