An emf of the order of mV is generated when two solutions of different hydrogen ion concentration are separated by a thin glass wall". This is the working principle of a (A) pH meter (B) Polarimeter (C) Chromatograph (D) Polarograph

An emf of the order of mV is generated when two solutions of different
hydrogen ion concentration are separated by a thin glass wall". This is the
working principle of a
(A) pH meter
(B) Polarimeter
(C) Chromatograph
(D) Polarograph
by

1 Answer

Answer :

(A) pH meter
by

Related questions

pH is defined as the negative logarithm of the hydrogen ion concentration. Comparing a pH 5 and a pH 8 solution, which of the following is true? w) There are 1,000 times more hydrogen ions in the pH 8 solution. x) There are 1,000 times more hydrogen ions in the pH 5 solution. y) There are 3 times more hydrogen ions in the pH 8 solution. z) Cannot tell the difference between these two solutions by pH, since the numbers are so close.

Description : pH is defined as the negative logarithm of the hydrogen ion concentration. Comparing a pH 5 and a pH 8 solution, which of the following is true? w) There are 1,000 times more hydrogen ions in ... . z) Cannot tell the difference between these two solutions by pH, since the numbers are so close.

Last Answer : ANSWER: X -- THERE ARE 1,000 TIMES MORE HYDROGEN IONS IN THE PH 5 SOLUTION

What is the relationship between the pH and in hydrogen ion concentration?

Description : What is the relationship between the pH and in hydrogen ion concentration?

Last Answer : The pH is the cologarithm of concentration (more correct activity) of hydrogen ions in a solution.

In a solution having a pH of 7.4, the hydrogen ion concentration is (A) 7.4 nmol/L (B) 40 nmol/L (C) 56 nmol/L (D) 80 nmol/L

Description : In a solution having a pH of 7.4, the hydrogen ion concentration is (A) 7.4 nmol/L (B) 40 nmol/L (C) 56 nmol/L (D) 80 nmol/L

Last Answer : Answer : B

PH is the negative logarithm of the hydrogen Ion Concentration express4ed in moles/liter of aqueous solution. PH of buffer solution is calculated by. Henderson’s equation Name the best indicator Phenolphthalein, PH range 8.3 to 10.0 Chemical kinetics deals with study of. Rates and mechanisms of chemical and Biochemical reactions

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Last Answer : What does Thermodynamics helps in predicting ?

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Description : Pick up the incorrect statement from the following:  (A) The pH value of water indicates the logarithm of reciprocal of hydrogen ion concentration in  water  (B) Higher value of pH ... value of pH means higher hydrogen ion contraction  (D) Lower value of pH gives alkaline solution 

Last Answer : (D) Lower value of pH gives alkaline solution 

The concentraction of hydrogen ion (H+ )is denoted by pH.How do you denote concentration of hydrogen ion(OH)?

Description : The concentraction of hydrogen ion (H+ )is denoted by pH.How do you denote concentration of hydrogen ion(OH)?

Last Answer : Ans:The concentration of hydrogen ion (OH) is denoted by poH.

(+) tartaric acid has a specific rotation of +12 unit when measured in 12cm polarimeter tube and 2g/ml concentration at given temperature and light. W

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At 17˚ C, the noise voltage generated by 5kΩ resistor, operating over a bandwidth of 20KHz is A. 1.3 nV B. 1.3 µV C. 1.3 pV D. 1.3 mV

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With regard to pattern electroretinogram: a. it can be used to estimate the visual acuity b. it is generated by the occipital cortex c. it is reduced in optic nerve diseases d. the signal amplitude is about 10 mV

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Last Answer : it is reduced in optic nerve diseases

The following technique makes use of the difference in net charges of proteins at a given pH: (A) Thin layer chromatography (B) Ion exchange chromatography (C) High performance liquid chromatography (D) Paper chromatography

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Last Answer : Answer : B

The noise output of a resistor is amplified by a noiseless amplifier having a gain of 60 and a bandwidth of 20 kHz. A meter connected at the output of the amplifier reads 1mV RMS. If the bandwidth of the amplifier is reduced to 5kHz, its gain remaining constant, what does the meter read now? A. 0.5 mV B. 0.5 µV C. 5.0 mV D. 5.0 µV

Description : The noise output of a resistor is amplified by a noiseless amplifier having a gain of 60 and a bandwidth of 20 kHz. A meter connected at the output of the amplifier reads 1mV RMS. If the bandwidth of the amplifier is reduced to ... does the meter read now? A. 0.5 mV B. 0.5 µV C. 5.0 mV D. 5.0 µV

Last Answer : A. 0.5 mV

Several approaches have been suggested to increase the fixation of professionally applied topical fluoride, which of the following statements IS INCORRECT regarding increasing the fixation? A. Increase concentration of fluoride in solutions B. Raise the PH of the fluoride solution C. Increase the exposure time to topical fluoride D. Pre-treat the enamel with 0.5% phosphoric acid E. Use NH4F rather than NaF at a lower PH

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Last Answer : B. Raise the PH of the fluoride solution

What is a chemical system that prevents changes in hydrogen ion concentration?

Description : What is a chemical system that prevents changes in hydrogen ion concentration?

Last Answer : This is called a buffer system. It resists changes in [H+]concentration, which is the same as saying it resists changes inpH.

Compared with intracellular fluid, extracellular fluid has, a. a greater osmolarity b. a higher protein concentration c. a lower chloride ion concentration d. a lower hydrogen ion concentration

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Last Answer : a lower hydrogen ion concentration

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Description : Hydrogen ion concentration in distilled water is (A) 10 -7 (B) 7 × 10 -7 (C) 10 7 (D) 7 × 10 7

Last Answer : (A) 10 -7

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Description : Draw a neat sketch of 1-ph induction type energy meter and write operating principle of it. 

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What statement about Arrhenius acids is FALSETheir aqueous solutions are electrolytesTheir water solutions are called aqueous acids They increase the concentration of hydroxide ions in aqueous solutionThey are molecular compounds with hydrogen ions?

Description : What statement about Arrhenius acids is FALSETheir aqueous solutions are electrolytesTheir water solutions are called aqueous acids They increase the concentration of hydroxide ions in aqueous solutionThey are molecular compounds with hydrogen ions?

Last Answer : The answer is: They increase the concentration of hydroxide ions in aqueous solution.

What is Glass Electrode pH Meter ?

Description : What is Glass Electrode pH Meter ?

Last Answer : A cell is formed by combining a glass electrode and a proof calomel electrode (indicating electrode) to which a fine voltmeter is connected and the pH meter is shown as the pH meter is shown instead of the volt unit in the recorder.

What is the effect on the magnitude of emf generated in an AC generator if the speed of rotation is increased?

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Last Answer : The magnitude of emf generated increases.

The inductance is the measure of a) Electric charges stored by the material b) Emf generated by energising the coil c) Magnetic field stored by the material d) Magnetization of dipoles

Description : The inductance is the measure of a) Electric charges stored by the material b) Emf generated by energising the coil c) Magnetic field stored by the material d) Magnetization of dipoles

Last Answer : c) Magnetic field stored by the material

What is the name of the emf generated in the primary that opposes the flow of current in the primary?

Description : What is the name of the emf generated in the primary that opposes the flow of current in the primary?

Last Answer : . Self-induced or counter emf

An emf is generated in a conductor when the conductor is cut by what type of field?

Description : An emf is generated in a conductor when the conductor is cut by what type of field?

Last Answer : Magnetic field.

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Description : Which of the following wil rotate the plane of polarised light in the polarimeter tube experiment ?

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Description : Why does a H+ ion attacking a carbon-carbon double bond add to the carbon with the least number of substituents? (a) the reaction is resonance stabilized. (b) the hybrid geometry favors this ... tends to attack stable centers of negative charge. (d) a more stable carbonium ion is generated.

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Description : Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution (A) A1is more alkaline than solution A2 (B) A1is highly acidic (C) A2is very slightly acidic (D) Both (B) & (C)

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Last Answer : (C) Both (A) and (B)

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