PPSC Chemistry Part VII NanoChemistry Online Test With Answers

PPSC Chemistry Part VII NanoChemistry Online Test

Sr. # Questions Answers Choice
1 Which idea of envisioned the construction of nano robots Building nano materials atom by atom Destruction of macromolecules to nano ones Bothe of the above None of the above
2 When a large block of silicon wafer is reduced to smaller component and hence non material is formed this approach is called. Bottom up Top down Left to right Right to left
3 When fullerencs were discovered they were thought to be First example of spherical aromatic molecule First example of spherical non aromatic molecule First example of diamond lime molecule None of the above
4 Chemical and physical properties of metal nano particles of atoms were observed to change periodically depending upon Number of atoms in a particle Shape of particle type of organization All of the above
5 A considerable number of atoms pertaining to the surface_____ with the decreasing the particle size. Increase Decrease No effect Both a and b
6 Stablization of particles and their reactivity is affected by. Surface properties Bulk properties Regardless to the surface properties No of particles
7 Attention should be focused on qualitative changes in particle properties as a function of. Particle numebrs Particle mass Particle size Particle density
8 The most important problem regarding nano chemistry Elucidation of relationship between also and chemical reactivity of particle Determination of size of particle Determination of reactivity of particle Determination of physical properties of nano particles.
9 In Nano synthesis new unsual chemical reactions are due to. Non equilibrium system Equilibrium system Isothermal system Adiabatic process
10 Formation of nano particles involves process lime Foramtion of metal nuclei on different sizes. Interaction among the formed particles Both A and B No interaction among the nano particles synthesized
11 The particles of about 1 nm need _______ activation energy to enter either aggregation processes or reactions to give to new chemicals. Higher Lesser N o All above
12 In confining and growing nano roade CNTs will act as. Template Support Source of oxidant Sieve
13 The physical methods of nano roads syntheses involves. Top down approach Bottom up approach Left right approach Right left approach
14 Which of the following is class of nanorods metals alloys Metal oxide and Metal sulphite All of the above
15 Alpha hematite nano tubes show dimensional magnetic ordering at temperature laser than 300 K. 0 1 2 3
16 Length of semiconductor nanorods are in the range of. 1.50 nm 1-50 micro meter 100-500 nm 50-100 nm
17 Nano particles may interact with the support to be. Partially oxidized Partically reduced Both a and b None
18 The orientation of a crystalline surface is confidently defined in terms of. Lijima Indices Miller indices Clausen indices None
19 Which of the following techniques is bulk technique. Powder XRD Single Crystal XRD SEM TEM
20 The suffix '-ene' in the name of fullerene shows the presence of ___ in the molecule. One triple bond One double bond Two single bonds Two triple bonds
Download This Set

Is this page helpful?