Nanoparticles

Q.

Identify the oxidising and reducing agents in the reaction:

Zn + CuSO₄ → Cu + ZnSO₄

1. Oxidising agent: CuSO₄ ; Reducing agent: Zn

2. Oxidising agent: Cu ; Reducing agent: ZnSO₄

3. Oxidising agent: ZnSO₄; Reducing agent: CuSO₄

4. Oxidising agent: Zn ; Reducing agent: Cu

Q.

The density of metal which crystallises in bcc lattice with unit cell edge length 300 pm and molar mass 50 g mol-1 will be

1. 6.15 g cm^-3

2. 9.31 g cm-3

3. 10.0 g cm^-3

4. 14.2 g cm^-3

Q.

What is used to make computer chips?

Q. A gas that is oxidizing as well as reducing agent

Q. What is isotropic and anisotropic

Q.

Examples for oxidant agent and reducing agent happens in chemical reaction .

Q. Which of these is an amorphous solid?
(A)glass
(B)rubber
(C)plastic
(D)all

Q. Which of the following nano materials are examples of two dimensional nano materials?

1. nanocoatings.
2. nanofilms, nanolayers
3. graphene,
4. A, B, C

Q. The charcoal particles present in the given suspension are ____________ in water.


(A) soluble
(B) insoluble

Q. The energy associated with each orbit as we move away from the nucleus.

1. decreases
2. remains the same
3. increases

Q. If molecularity is two then why it is called Psuedo unimolecular reaction

Q. Which of the following lists the disadvantages of nanomaterials?

1. Nanomaterials are also pretty difficult to manufacture.
2. Nanoparticles are very small, inhalation of these particles can cause problems.
3. Nanomaterials are very expensive.
4. All of the above.

Q. The nanomaterials are classified into which of the following?

1. Nanolayers
2. Nanotubes or nanowires
3. Nanoparticles
4. All of the above

Q. In which of the following type of nano material all the dimensions are measured within the nano scale?

1. Two dimensional naomaterial
2. Zero dimensional naomaterial
3. one dimensional naomaterial
4. Three dimensional naomaterial

Q. Which of the following nano materials are examples of zero dimensional nano materials?

1. Diamond
2. Fullarene
3. Nano particles
4. Graphite

Q. Carbon nano tubes are made up of:

1. carbon nano particle
2. carbon atoms
3. none of the above
4. compounds containing carbon atoms

Q. Nanoclusters have at least one dimension between .................. nanometers and a narrow size distribution.

1. 1 and 1000 nanometer
2. 1 and 100 nanometer
3. 1 and 10 nanometer
4. 0 and 1 nanometer

Q. Which of the following are characteristic properties of nano particles?

1. More surface area
2. Quantum effects
3. Both a and b
4. None of the above

Q.

Write True or False for the following statement:

Nanotubes are formed by fullerenes allotrope of carbon.

1. True
2. False

Q. The continous part of X-ray spectrum is result of A) photoelectric effect B) Raman effect C) Compton effect D) inverse photoelectric effect

Q. Electron gain enthalpy depends on atomic size.

1. False
2. True

Q. Coose the correct statements.
P: Nanoparticles are unstable when they react with oxygen.
Q: Nanotechnology is applied in the production of synthetic skin and implant surgery.
R: Nano particles are non-reactive in nature.

1. P and Q are correct.
2. Only P is correct.
3. R is correct.
4. All of these are correct.

Q. A dispersed phase particle in a zig-zag movement is shown. What kind of motion is exhibited by the particle?

1. Circular motion
2. Transitional motion
3. Linear motion
4. Brownian motion

Q. ____________ nanotubes are used as strengthening rods and toughening elements in structural composite materials.

1. Gold
2. Carbon
3. Silver
4. Metal oxide