S Chand Class 9 Chemistry Solutions. We covered all the S Chand Class 9 Chemistry Solutions in this post for free so that you can practice well for the exam.
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S Chand Class 9 Chemistry Objective with Solutions for Students
In the bottom-up synthesis of nanomaterials:
(A) Bulk material is breaking into nano.
(B) Bulk solids are disassembled into finer pieces.
(C) Molecular assemblies get combined atom by atom, molecule by molecule, and cluster by cluster.
(D) None of the above.
Option c – Molecular assemblies get combined atom by atom, molecule by molecule, and cluster by cluster
In the top-down synthesis of nanomaterials:
(A) Bulk material is breaking into nano size.
(B) Bulk solids are disassembled into finer pieces.
(C) Molecular assemblies get combined atom by atom, molecule by molecule, and cluster by cluster.
(D) Both ‘A’ and ‘B’
Option d – Both ‘A’ and ‘B’
Sol-gel method for the preparation of nanomaterials involves:
(A) Hydrolysis
(B) Polycondensation
(C) Thermal decomposition
(D) All of these
Option d – All of these
UV visible spectroscopy is used to detect:
(A) Primary confirmation of the formation of nanoparticles.
(B) Particle size of nanomaterial.
(C) Structure of the surface of the material.
(D) Absorption of functional group.
Option a – Primary confirmation of the formation of nanoparticles
The hardness of the material in nanosize is:
(A) Very high with respect to bulk material.
(B) Very low with respect to bulk material.
(C) Remains the same.
(D) Cannot predict.
Option a – Very high with respect to bulk material
Carbon nanotubes are:
(A) Conductor of electricity.
(B) Semiconductor.
(C) Bad conductor.
(D) Both ‘A’ and ‘B’.
Option d – Both ‘A’ and ‘B’
We covered all the s chand class 9 chemistry solutions above in this post for free so that you can practice well for the exam.
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