Question 11 : °API gravity of water at N.T.P. is about
1. 0
2. 100
3. 1
4. 10
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Question 12 : The atomic heat capacities of all solid elements __________ with decrease in temperature.
1. remains unchanged
2. decreases
3. increases
4. approach zero at 0°C
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Question 13 : 'The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes''. This is the __________ law.
1. GayLussac's
2. Amgat's
3. Dalton's
4. Avogadro's
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Question 14 : Pick out the correct conversion.
1. 1 calorie = 456 BTU
2. 1 BTU = 252 calories
3. 1 BTU =456 calories
4. 1 calorie = 252 BTU
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Question 15 : For water evaporating into usaturated air under adiabatic conditions and at constant pressure, the __________ remains constant throughout the period of vaporisation.
1. dry bulb temperature
2. wet bulb temperature
3. relative saturation
4. humidity
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Question 16 : The reverse process of fractional crystallisation is called
1. differential distillation
2. leaching
3. stripping
4. absorption
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Question 17 : Which of the following is not used for computing latent heat of vaporisation ?
1. Hess's law of constant heat summation
2. Clausius-Clayperon equation
3. Reference substance plots based on Durhing & Othmer plots
4. Kistyakowasky's equation
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Question 18 : The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.
1. same as
2. not related to
3. lower than
4. higher than
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Question 19 : Which of the following is followed by an ideal solution ?
1. Raoult's law
2. Amgat's law
3. Boyle's law
4. Trouton's rule
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Question 20 : "One of the specific gravity scales is ""Brix"" (used speicifically for sugar solution). It is defined as"
1. Brix = 200 (G-1)
2. Brix = 145 - (145/G)
3. Brix = (400/G) - 400
4. none of these
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