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In which state of chemical substances does a chemical sensing device work?

In which state of chemical substances does a chemical sensing device work? Correct Answer Vapour

The chemical sensors detect the chemicals in the vapour form. Most of the chemical sensor are in the form of gas sensors. These sensors are widely used in industries to detect any gas leakage or for automatic fire alarms.

Related Questions

Consider the following aspects of substances involved in a chemical reaction: A. Physical state of all the substances  B. Number of molecules of all substances  C. Number of atoms of each substance D. Sum of masses of all atoms of substances  Which of the above remain the same before and after a chemical reaction has taken place? 
1. A Judicial Magistrate First Class can authorize the detention in custody, of a person accused of an offence triable by Special Court established under The Narcotic Drugs and Psychotropic Substances Act, 1985, for a period not exceeding fifteen years.
2. The Special Court established under The Narcotic Drugs and Psychotropic Substances Act, 1985, cannot exercise the power to authorize the detention of accused in custody, as enunciated under Section 167 of Code of Criminal Procedure.
3. The definition of 'use' under Section 2(xxviii-a) of The Narcotic Drugs and Psychotropic Substances Act, 1985, excludes personal consumption of narcotic drugs and psychotropic substances.
4. The High Court, by special order, may constitute as many Special Courts under The Narcotic Drugs and Psychotropic Substances Act, 1985, as necessary.
Which of the above statements are correct?
Consider the following statements regarding the Remote Sensing Survey: 1) Information transfer is accomplished by the use of electromagnetic radiation 2) Remote Sensing from space is done by satellites 3) Remote Sensing has no application in Earthquake prediction Which of the above statements are correct?
The phase difference of the waves 1 and 2 at A in the given figure is:
Elements of Remote Sensing mcq question image
In the given figure the phase of
Elements of Remote Sensing mcq question image
Which of the following statements are true regarding diamagnetic substances? (i) Diamagnetic substances are feebly repelled by magnets (ii) Diamagnetic substances move from stronger field side to weaker field side (iii) Permeability of diamagnetic substances is greater than one. (µ > 1)
Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the right order to form a meaningful and coherent paragraph. P. The newly discovered substances emitting radiations were called radioactive substances. Q. This property of emitting radiations spontaneously by these substances was named radioactivity. R. Since then many radioactive substances have been discovered. S. Some occur naturally while others are produced artificially.
Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the right order to form a meaningful and coherent paragraph. A. This whole process of breakdown of complex components of food into simpler substances is called digestion B. These complex substances cannot be utilized as such.  C. The components of food such as carbohydrates are complex substances. D. So they are broken down into simpler substances.
Given below are two quantities named 1 and 2. Based on the given information, you have to determine the relationship between the two quantities. You should use the given data and your knowledge of Mathematics to choose between the possible answers. Quantity 1: P and Q can do a work in 6 days and Q and R can do a work in 60/7 days and P and R can do a work in 20/3 days. If Q and R work for first 2 days and left the work. Find the total time taken by P to complete the remaining work. Quantity 2: A and B can do a work in 8/3 days, B and C can do the same work in 3 days and A and C can do the same work in 24/5 days. In what time C alone can complete the work?
P can complete ¼ of some work in 10 days, Q can complete 40% of the same work in 48 days. R completes 1/8 of the work in 5 days and S does 1/10 of the work in 2 days. ½ of total work is done by (Q + R) and remaining work is done by (P + S). What will be the ratio of the days for completing ½ of work by (Q + R) and remaining work by the (P + S)?