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A hydrate of magnesium iodide has a formula ${MgI}_{2} . {xH}_{2} O$ . A $1.055 g$ sample is heated to a constant weight of $0.695 g$ . What is the value of $x$ ? (Atomic mass of Mg=24.3, I =126.9)

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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-2>Q 37

The number of neutrons in

5.5 g T_{2} O (T

{}_{1}{{}^{3}H})

are:-

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 39

A mixture of hydrocarbon

C_{2} H_{2}, C_{2} H_{4} & {CH}_{4}

in mole ratio of

2 : 1 : 2

is burnt completely in the presence of air containing

80 % N_{2} & 20 % O_{2}

by volume. The mass of air required for the complete combustion of the one gm of mixture is

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 41

Two gases $A$ and $B$ which react according to the equation
${aA}_{(g)} + {bB}_{(g)} ⟶ {cC}_{(g)} + {dD}_{(g)}$
to give two gases $C$ and $D$ are taken (amount not known) in an Eudiometer tube (operating at a constant Pressure and temperature) to cause the above.

If on causing the reaction there is no volume change observed then which of the following statement is/ are correct.

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 42

A mixture of

C_{3} H_{8} (g)

O_{2}

having total volume

100 ml

in an Eudiometry tube is sparked & it is observed that a contraction of

45 ml

is observed what can be the composition of reacting mixture.

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 43

A mixture of

100 ml

CO, {CO}_{2}

and

O_{2}

was sparked. When the resulting gaseous mixture was passed through

KOH

solution, contraction in volume was found to be

80 ml

, the composition of initial mixture may be (in the same order)

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 44

An organic compound is burnt with excess of

O_{2}

to produce

{CO}_{2} (g)

and

H_{2} O (l)

, which results in

25 %

volume contraction. Which of the following option(s) satisfy the given conditions.

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 45

100 ml

mixture of

CO

and

{CO}_{2}

mixed with

30 mL

O_{2}

and sparked in eudiometer tube. The residual gas after treatment with aq.

KOH

has a volume of

10 mL

which remains unchanged when treated with alkaline pyrogallol. If all the volumes are under the same conditions, point out correct options(s):

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-2>Q 46

1 mol

of iron

(Fe)

reacts completely with

0.65 {molO}_{2}

to give a mixture of only

FeO

and

{Fe}_{2} O_{3} .

Mole ratio of ferrous oxide to ferric oxide is :-

A hydrate of magnesium iodide has a formula MgI2.xH2O. A 1.055 g sample is heated to a constant weight of 0.695 g. What is the value of x? (Atomic mass of Mg=24.3, I =126.9)

Important Questions on Some Basic Concepts of Chemistry

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A hydrate of magnesium iodide has a formula ${MgI}_{2} . {xH}_{2} O$ . A $1.055 g$ sample is heated to a constant weight of $0.695 g$ . What is the value of $x$ ? (Atomic mass of Mg=24.3, I =126.9)