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

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Out of molarity $(M)$ , molality $(m)$ , formality $(F)$ and mole fraction $(x)$ those independent of temperature are:

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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 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:

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 4

An aqueous solution of concentrated hydrobromic acid contains

48 %

HBr by mass. If the density of the solution is

\frac{1.50 g}{mL}

, what is its concentration :(Atomic mass of Br=79.90u,H= 1u)

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 5

An antifreeze mixture consists of

40 %

ethylene glycol

(C_{2} H_{6} O_{2})

by weight in aqueous solution. If the density of this solution is

1.05 g / mL

, what is the molar concentration :

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 7

{XeF}_{6}

fluorinates

I_{2}

to

{IF}_{7}

and liberates Xenon (g).

210 mmol

of

{XeF}_{6}

can yield a maximum of

- mmol

of

{IF}_{7}

:

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 8

When

100 g

of ethylene polymerises entirely to polyethene, the weight of polyethene formed as per the equation

n (C_{2} H_{4}) \to {(- {CH}_{2} - {CH}_{2} -)}_{n}

is:

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 9

A

10

gram sample of natural gas containing

{CH}_{4}

and

C_{2} H_{4}

was burnt in excess of oxygen to give

29.0

grams of

{CO}_{2}

and some water. How many grams of water are formed :