Tag: applied chemistry

Quizzes (14) Questions (81)

Questions Related to applied chemistry

Multiple choice nanochemistry nanotechnology applied chemistry materials chemistry

Quantum dot is a___________.

  1. Nano particle

  2. Semi conductor

  3. A,B

  4. Insulator
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Quantum dot is a Semi conductor made up of Nano particles.Basically a single electron trapped inside a cage of atoms and when the dot is exposed to a pulse of light at the right time and wavelength, the electron is raised to an exited state. Thus when the electron fall back to its ground state, these dots then have the ability to glow. Quantum dots are a special class of materials known as semiconductor. Quantum dots are very special because they are so small that 4,000,000 dots take up 2 cm. Hence option C is correct.

Multiple choice nanochemistry nanotechnology applied chemistry materials chemistry

Nano wires and Nano tubes are:

  1. materials that are nanoscale in two dimensions

  2. materials that have one dimension in the nanoscale

  3. materials that are nanoscale in three dimensions

  4. all the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$\text{Nano wire and Nano tubes :}$

$\text{1.Measurment in nano scale.}$ 
$\text{2.Two dimensional.}$

Multiple choice nanochemistry nanotechnology applied chemistry materials chemistry

The advantages of using nanoparticles as a drug delivery system include:

  1. the size and surface characteristics of nanoparticles can be easily manipulated. This could be used for both passive and active drug targeting

  2. nanoparticles can be made to control and sustain release of the drug during the transportation as well as the location of the release. Since distribution and subsequent clearance of the drug from the body can be altered, an increase in drug therapeutic efficacy and reduction in side effects can be achieved.

  3. choosing an appropriate matrix also helps in increasing the efficacy and reducing side effects

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The size and surface characteristics of nanoparticles can be easily
    manipulated. This could be used for both passive and active drug
    targeting
  • Nanoparticles can be made to control and sustain release of the drug during the transportation as well as the location of the release.
    Since distribution and subsequent clearance of the drug from the body can be altered, an increase in drug therapeutic efficacy and reduction in side effects can be achieved.
  • Choosing an appropriate matrix also helps in increasing the efficacy and reducing side effects
  • Targeted drugs may be developed
  • Various routes of administration including oral, nasal, injection, intra-ocular (within the eyes) etc. can be used.
  • Hence option D is correct.
Multiple choice nanochemistry nanotechnology applied chemistry materials chemistry

Increased relative surface area, and quantum effects of nano particles increase the which of the following properties :

  1. reactivity of the Nano particles

  2. strength of the Nano particles

  3. electrical characteristics of the Nano particles

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Two principal factors cause the properties of nanomaterials to differ  significantly from other materials: increased relative surface area, and
quantum effects. These factors can change or enhance properties such as
reactivity, strength and electrical characteristics.
Increased relative surface area, and quantum effects of nano particles increases the :

reactivity of the Nano particles, strength of the Nano particles, electrical characteristics of the Nano particles.
Hence option D  is correct.

Multiple choice nanochemistry nanotechnology applied chemistry materials chemistry

Materials which  have one dimension in the nanoscale (and are extended in the other two dimensions) are:

  1. Graphene

  2. Thin films

  3. Surface coatings

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All are having one dimension and can extend up to other two dimensions also.

Multiple choice nanochemistry nanotechnology applied chemistry materials chemistry

What are the dimensions of nanomaterials?

  1. Between 1 nm and 100 nm

  2. Between 100 nm and 10000 nm

  3. Between 0.01 nm and 1 nm
  4. Between 1 $\mu$m and 100 $\mu$m
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nanomaterials have atleast one dimension between 1 nm and 100 nm.

Multiple choice nanochemistry nanotechnology applied chemistry materials chemistry

Which of the following are applications of Nano particles?

  1. Targeted drugs may be developed

  2. Various routes of administration including oral, nasal, injection, intra-ocular (within the eyes) etc. can be used.

  3. The size and surface characteristics of nanoparticles can be easily manipulated. This could be used for both passive and active drug targeting

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The size and surface characteristics of nanoparticles can be easily
    manipulated. This could be used for both passive and active drug targeting
  • Nanoparticles can be made to control and sustain release of the drug during the transportation as well as the location of the release.
    Since distribution and subsequent clearance of the drug from the body
    can be altered, an increase in drug therapeutic efficacy and reduction in side effects can be achieved.
  • Choosing an appropriate matrix also helps in increasing the efficacy and reducing side effects
  • Targeted drugs may be developed
  • Various routes of administration including oral, nasal, injection, intra-ocular (within the eyes) etc. can be used.
  • Hence option D is correct.
Multiple choice nanochemistry nanotechnology applied chemistry materials chemistry

Carbon nano tubes are made up of:

  1. carbon nano particle

  2. carbon atoms

  3. compounds containing carbon atoms

  4. none of the above
Reveal answer Fill a bubble to check yourself
A,B Correct answer
Explanation

Carbon nano tubes are made up of carbon nano particles. Example: Fullerene is the allotrope of carbon. It is also a nanomaterial. The cylindrical fullerene is called as carbon nano tube. 

Multiple choice nanochemistry nanotechnology applied chemistry materials chemistry

Which of the following are production  methods of nanomaterials?

  1. Top-Down method

  2. Bottom-Up method

  3. Down-Top method

  4. A,B only
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nanomaterials are not simply another step in the miniaturization of  materials or particles. They often require very different production approaches. There are several processes to create various sizes of nanomaterials, classified as top-down and bottom-up. Although large numbers of nanomaterials are currently at the laboratory stage of manufacture, many of them already are being commercialized. Hence option D is correct.

Multiple choice nanochemistry nanotechnology applied chemistry materials chemistry

The size of a nano particle is ____________ of a typical bacterium.

  1. 10 times that

  2. 1000 times

  3. 1/100th

  4. one millionth
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The size of a nanoparticle is  about 50000 times smaller than the diameter of a single strand of human hair and 1/100th of a typical bacterium.