Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 55

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$2 gm$ of an impure mixture of ${MgCO}_{3}$ was dissolved in $50 ml$ of $0.8 M HCl$ The excess of acid required $20 ml$ of $0.2 M NaOH$ for complete neutralization. The percentage of ${MgCO}_{3}$ in the sample will be

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Important Questions on Some Basic Concepts of Chemistry

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 56

The number of moles present in

2

litre of

0.5 moles NaOH

is:

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 57

The normality of

0.3 M

phosphorus acid

(H_{3} {PO}_{3})

is

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 58

The density of

{NH}_{4} OH

solution is

0.6 g {mL}^{- 1}

. It contains

34 %

by weight of

{NH}_{4} OH

. Calculate the normality of the solution:

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 59

A molal solution is one that contains one mole of a solute in

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 60

Out of molarity

(M)

, molality

(m)

, formality

(F)

and mole fraction

(x)

those independent of temperature are:

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 61

3.0

molal

NaOH

solution has a density of

1.110 g / mL

. The molarity of the solution is :

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 1

An alloy of gold and silver contains

38.5 %

silver by mass and has a density of

14.6 g \cdot {mL}^{- 1}

. What is the molar concentration of silver in this alloy:(Atomic weight of Ag-108u)

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 2

"Suvarnabhasm", an ayurvedic drug, is found to contain

400 ppm

of colloidal gold. Mass

%

of gold (atomic mass of

Au = 197

) will be: