Engineering :: Instrumentation and Process Control
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71. |
Refractometer works on the principle of |
A. |
polarisation of light |
B. |
change of angle of refraction with composition |
C. |
change of the electrical donductivity of solution with composition |
D. |
change of the electrical conductivity of solution with temperature |
Answer: Option B
Explanation:
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72. |
Polarimeter works on the principle of |
A. |
polarisation of light |
B. |
change of the electrical conductivity of solution with composition |
C. |
change of angle of refraction with composition |
D. |
change of electrical conductivity of solution with temperature |
Answer: Option A
Explanation:
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73. |
Polarimeter is used for the analysis of |
A. |
any liquid solution |
B. |
sugars and chemicals having symmetrical structures |
C. |
any solid |
D. |
any gaseous mixture |
Answer: Option B
Explanation:
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74. |
Conductivity meter works on the principle of |
A. |
change of angle of refraction with composition |
B. |
polarisation of light |
C. |
change of electrical conductivity of solution with composition |
D. |
change of electrical resistance with temperature. |
Answer: Option C
Explanation:
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75. |
The units of specific conductance are |
Answer: Option B
Explanation:
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76. |
Specific conductance in micro-mho/cm of a good quality distilled water is |
Answer: Option C
Explanation:
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77. |
Specific conductance in micro-mho/cm of a excellent quality raw water is |
Answer: Option A
Explanation:
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78. |
If a solution has pH = 2. it is |
A. |
highly acidic |
B. |
weakly acidic |
C. |
neutral |
D. |
alkaline |
Answer: Option A
Explanation:
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79. |
At room temperature [H+] [OH-] is equal to |
A. |
10-7 moles/litre |
B. |
10-14 moles/litre |
C. |
10-10 moles/litre |
D. |
10-16 moles/litre |
Answer: Option B
Explanation:
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80. |
If [OH-] = 10-6 moles/litre its pH is |
Answer: Option B
Explanation:
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