Question

DUL
Rdledbe
11 Assertion (A): The empirical mass of ethene is half of its molecular mass.
Reason (R) : The empirical formula represents the simplest whole number ratio of
various atoms present in a compound.
12. Assertion (A) One atomic mass unit is defined as one twelfth of the mass of one
carbon-2 atom.
Reason (R) : Carbon-12 isotope is the most abundant isotope of carbon and has been
chosen as standard
13. Assertion (A): All isotopes of a given element show the same type of chemical
behavior
Reason (R) : The chemical properties of an atom are controlled by the number of
electrons in the atom.
14. Assertion A): It is impossible to determine the exact position and exact
momentum of an electron simultaneously.
Reason (R) : The path of an electron in an atom is clearly defined.
15. Assertion (4) · Significant figures for 0.200 is 3 whereas for 200 it is 1.
Reason (R) - Zero at the end or right of a number are significant provided they are
not on the right side of the decimal point.
Very Short Answer Questions (1 mark each)
16. Which of the following orbital's are degenerate?
Boxy, 4dxy, 3dz2, 3dyz, 4 dyz, 4dzz
17. The electronic coníiguration of valence shell of cu is 30°45' and not 30°45. How
is this configuration explained?
18. Table-tennis ball has a mass 10 g and a speed of 90 m/s. if speed can be
measured within an accurcy of 4what will be the uncertainty in speed and
position?




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Answer 1

Answer:

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