Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 36

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The ratio of mass of elements in silver compound is $8 : 27$ , if atomic mass of silver is $108 gm$ . Then what is mass of $X :$

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Important Questions on Some Basic Concepts of Chemistry

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 37

The mass of

10

molecules of

H_{2} {SO}_{4}

is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 38

An element is found in nature in two isotopic forms with mass numbers

(A - 1)

and

(A + 3) .

If the average atomic mass of the element is found to be

A

, then the relative abundance of the heavier isotope in the nature will be:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 39

A hypothetical element

Z

exists in nature as two isotopes

{}^{65}Z

and

{}^{67}Z

with their relative abundances

25 %

and

75 %

respectively. Then, the average atomic mass (in

u

) of element

Z

is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 40

1

mole by definition represents same number of particles as:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 41

39.4 kg

of gold was recovered from a smuggler. The number of atoms of gold recovered are:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 42

124 g

of

P_{4}

will contain which of the following:
(1)

4

atoms of Phosphorus
(2)

4 N_{A}

atoms of Phosphorus
(3)

Na

molecules of Phosphorus
(4)

1

molecule of Phosphorus

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 43

The total number of protons in

63 mg {HNO}_{3}

is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 44

A gaseous mixture contains oxygen and sulphur dioxide in the ratio of

1 : 4

by mass. Therefore, the ratio of their respective number of molecules is: