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Analytical Instrumentation Mcqs

Q:

Beer Lambert’s law gives the relation between which of the following?

A) Reflected radiation and concentration B) Scattered radiation and concentration
C) Energy absorption and concentration D) Energy absorption and reflected radiation
 
Answer & Explanation Answer: C) Energy absorption and concentration

Explanation: Beer Lambert’s law gives the relation between Energy absorption and Concentration. It was proposed by Beer and Lambert.

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1162
Q:

Which of the following components are used as the sample carrier?

A) Curvette B) Flask
C) Capillary tube D) Float glass
 
Answer & Explanation Answer: D) Float glass

Explanation: Float glass is used as the sample carrier. It is mounted as the second reflector stage.

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594
Q:

The representation of Beer Lambert’s law is given as A = abc. If ‘b’ represents distance, ‘c’ represents concentration and ‘A’ represents absorption, what does ‘a’ represent?

A) Intensity B) Transmittance
C) Absorptivity D) Admittance
 
Answer & Explanation Answer: C) Absorptivity

Explanation: ‘a’ represents the absorption constant. It is also known as absorptivity.

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478
Q:

Lambert’s law states that the intensity of light decreases with respect to __________

A) Concentration B) Distance
C) Composition D) Volume
 
Answer & Explanation Answer: B) Distance

Explanation: Lambert’s law states that the intensity of light decreases with respect to the concentration of the medium. It was stated by Lambert.

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451
Q:

In which of the following ways, absorption is related to transmittance?

A) Absorption is the logarithm of transmittance B) Absorption is the reciprocal of transmittance
C) Absorption is the negative logarithm of transmittance D) Absorption is a multiple of transmittance
 
Answer & Explanation Answer: C) Absorption is the negative logarithm of transmittance

Explanation: Transmittance is the ratio of the radiant power transmitted by a sample to the radiant power incident on the sample. Absorption is the negative logarithm of transmittance.

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414
Q:

Which of the following is also known as X-ray photoelectron spectroscopy?

A) Auger electron spectroscopy B) Electron impact spectroscopy
C) Electron spectroscopy for chemical analysis D) Secondary ion mass spectroscopy
 
Answer & Explanation Answer: C) Electron spectroscopy for chemical analysis

Explanation: Electron spectroscopy for chemical analysis is also known as X-ray photoelectron spectroscopy. It is an effective technique for detecting the elements.

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381
Q:

Which of the following is known as a scintillation counter?

A) Scintillator B) Scintillator along with a photo multiplier tube
C) Scintillator along with the crystal D) Scintillator along with position circuitry
 
Answer & Explanation Answer: B) Scintillator along with a photo multiplier tube

Explanation: Scintillation detector along with a photo multiplier tube is known as scintillation counter. Scintillation is the process of turning radioactive energy into light using a scintillator.

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375
Q:

Which of the following is not true about Absorption spectroscopy?

A) It involves transmission B) Scattering is kept minimum
C) Reflection is kept maximum D) Intensity of radiation leaving the substance is an indication of a concentration
 
Answer & Explanation Answer: C) Reflection is kept maximum

Explanation: In Absorption spectroscopy, reflection must also be kept minimum along with scattering. Amount of absorption depends on the number of molecules in the material.

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