The final temperature of a mixture of 100g of water at 30°C temperature and 100g of water at 60°C temperature is ………………………
A) 45° C
B) 70° C
C) 90° C
D) 130° C
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175 litres of a solution contains `88%` of acid and the rest water. How many liters of water must be added such that the resulting mixture contains `2
Correct Answer - 25 litres
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(i) Paper, water and pulp are intermediate goods for this final product A) Computer
(i) B) Notebook (ii) B) Iron
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A mixture has 18 g water and 414 g ethanol. What are the mole fractions of water and ethanol?
Given : Mass of water = 18 g, Mass of ethanol = 414 g To find : Mole fractions of water and ethanol Formulae : Mole fractions of A = \(\frac{n_A}{n_A+n_B}\) Mole fractions of B = \(\frac{n_B}{n_A+n_B}\) Calculation : Number of...
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The temperature of mixture of equal quantities of water at 90°C and water at 60°C when added together is ………………….
Correct option is D) 75° C
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When ‘m’ g of ice is added to ‘M’ g of water at 20 °C, state the conditions for m and M for which i) temperature of the mixture remains 0° C.
The heat lost by water in going from 20 °C to 0°C, Q1 = Msw ∆T = \(\frac{M}{1000}\) × 4.2 × 103 × (20) = 84M J Now, heat required to convert m g of ice into water...
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When the components of the mixture formed are uniformly distributed through out it there it is called …………….. mixture.
A) homogeneous
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When the components of the mixture formed are not distributed uniformly throughout it, then the mixture is called ……………. mixture.
B) heterogeneous
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The mass by mass percentage concentration of a 100g salt solution, which contains 20g salt is
Correct option is B) 20%
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Solution X contains 50 g of salt in 100g of water and solution Y contains 100g of salt in 200g of water.
A) Solution X has the same concentration as solution Y.
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