The relative abundance of an ion with a definite m/e value is measured by _?

D. The ion current in a mass spectrometer

A. The wavelength of emitted radiation

B. The deflection angle in a magnetic field

C. The velocity of ions in an electric field

D. The ion current in a mass spectrometer

Everyday Science · Introduction to Everyday Science · page 9 of 13

Important Scientific (96) MCQs with Answers

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Important Scientific Instruments MCQs (81–90)

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Past paper MCQs in this chapter · See all past papers

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81.
The pressure of oxygen inside the bomb calorimeter is?
Correct Answer: B. 20-40 atm
One-liner
The pressure of oxygen inside a bomb calorimeter is 20-40 atm.
82.
Spectrometer is used for measurement of _?
Correct Answer: D. Laser/Wavelength
One-liner
A spectrometer is used for the measurement of laser/wavelength (the wavelength or spectrum of light).
83.
Which instrument is used to measure the height of an aircraft above the ground?
Correct Answer: B. Altimeter
One-liner
An altimeter is the instrument used to measure the height of an aircraft above the ground.
84.
Humidity in the air was measured by _?
Correct Answer: D. Hygrometer
One-liner
Humidity in the air is measured by a Hygrometer.
85.
Magnetic field is measured by _?
Correct Answer: D. Magnetometer
One-liner
Magnetic field is measured by a Magnetometer.
86.
The relative abundance of an ion with a definite m/e value is measured by _?
Correct Answer: D. The ion current in a mass spectrometer
One-liner
The relative abundance of an ion with a definite m/e value is measured by the ion current in a mass spectrometer.
87.
Magnification of a light microscope is formed by using mixture of the power of the eyepiece and the _ lens.
Correct Answer: D. Objective
One-liner
The magnification of a light microscope is the product of the powers of the eyepiece (ocular) lens and the objective lens.
88.
If zero line of Vernier scale coincides with zero of main scale, then zero error is ?
Correct Answer: C. Zero
One-liner
When the zero of the Vernier scale coincides exactly with the zero of the main scale, the zero error is zero.
89.
Past Paper MCQ
Radioactivity is measured by which device?
Correct Answer: A. Geiger counter
One-liner
Radioactivity is measured by a Geiger counter (also called a Geiger-Müller counter).
90.
Best method to detect explosives or gunpowder is?
Correct Answer: C. Sniffers
One-liner
The best method to detect explosives or gunpowder is sniffers, which are devices that detect trace chemical vapors released by explosive materials.

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Important Scientific (96) MCQs with Answers

Important Scientific Instruments MCQs (81–90)

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