Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 136

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The weight of $1 \times 10^{22}$ molecules of ${CuSO}_{4} . 5 H_{2} O$ is:

( Molar mass of $Cu = 63.5 g, S = 32 g, O = 16 g, H = 1 g$ ) $(Use Avogadro' s number as 6 \times 10^{23})$

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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 137

How many moles of electrons weigh one kilogram?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 138

Under the same conditions of temperature and pressure, two gases have the same number of molecules. They must

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 139

The number of oxygen atoms present in

5.6 litre

of oxygen gas at

STP

is.........

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 140

If

V mL

of the vapours of substance at

NTP

weights

W g

, then molecular weight of the substance is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 141

If

1 {dm}^{3}

of a gas weighs

2.5 g

at

STP

, its gram-molecular weight is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 142

16 g

of an ideal gas

{SO}_{x}

occupies

5.6 L

at

STP

. The value of

x

is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 146

Which among the following is not a basic postulate of Dalton's atomic theory?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 147

The reference element used in the modern atomic weight scale is: