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Stoichiometry

Stoichiometry
For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is

3
2
1

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Stoichiometry
The density of a gas at N.T.P.is 'ρ'. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ¾ 0.75ρ at a temperature of __________ °K

400°
300°
273°
300°

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Stoichiometry
A sample of well water contains 140 gm/m³ Ca²⁺ ions and 345 gm/m³ Na⁺ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO₃ in gm/m³ is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)

140
485
350
345

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Stoichiometry
One of the specific gravity scales is "Brix" (used speicifically for sugar solution). It is defined as

None of these
Brix = (400/G) - 400
Brix = 145 - (145/G)
Brix = 200 (G-1)

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Stoichiometry
1 BTU/lb.←°F is equivalent to __________ kcal/kg.°C.

1.987
1
4.97
2.42

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Stoichiometry
Disappearance of snow in subzero weather exemplifies the process of

Evaporation
Vaporisation
Melting
Sublimation

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