1➤
Mention the total number of principles of green chemistry.
=> Ans: There are total 12 principles of green chemistry.
2➤
Name the catalyst used to manufacture of H₂SO, by contact process.
=> Ans: Platinised asbestos is used as a catalyst in the manufacture of
H₂SO, by contact process.
3➤
Name the plant which is an example of self-cleaning.
=> Ans: Lotus is an example of self-cleaning plant.
4➤
Write the name of nanomaterial which is used in water purification
=> Ans: Silver nanoparticles are used in water purification.
5➤
Name the y-isomer of benzene hexachloride.
=> Ans: The y-isomer of benzene hexachloride is called gammexane or
lindane.
6➤
Name the y-isomer of benzene hexachloride.
=> Ans: The y-isomer of benzene hexachloride is called gammexane or
lindane.
7➤
Which principle of green chemistry has its perspective towards carrying
out reactions at room temperature and pressure?
=> Ans: Design for energy efficiency has its perspective towards
carrying. reactions at room temperature and pressure.
8➤
Write any example of nanoparticles which is used in photo
catalysis.
=> Ans: TiO₂, ZnO nanoparticles are used in photocatalysis.
9➤
Write the formula to calculate % atom economy.
=> Ans. Formula weight of the desired product % atom economy Sum of
formula weight of all the reactants used in the reaction
10➤ Name the isomer of BHC.
=> Ans. Lindane.
11➤
Q. 153. Ridhima wants to detect structure of surface of materials. Name
the technique she has to use.
=> Ans. Scanning electron microscopy (SEM).
12➤
Which nanomaterial is used for tyres of car to increase the life of
tyres?
=> Ans. Carbon black.
13➤
Name the scientist who discovered scanning tunnel ing microscopy (STM) in
1980.
=> Ans. Gerd Binning and Heinrich Rohrer. (Nobel prize 1986)
14➤ 1 nm-...... m?
=> Ans. 1 nm 10 m.
15➤
ow many principles does green chemistry have?
=> Ans. Twelve.
16➤
Which principle of green chemistry has its perspec tive largely towards
petrochemicals?
=> Ans. Use of renewable feedstocks.
17➤
Name the chemical which leachs out of plastic packaging materials
=> Ans. Phthalate.
18➤
Name the materials having structural components
=> Ans. Nanomaterials.
19➤
Name the materials having structural components
=> Ans. Nanomaterials. with at least one dimension in the nanometer
scale.
20➤
Name the class of nanomaterial i.e. nanotubes. fibres, nanowires belong
to.
=> Ans. Two dimensions are in the nanoscale.
21➤
Name the nanoparticles used in sunscreen.
=> Ans. Zinc oxide (ZnO) and Titanium dioxide (TiO₂).
22➤
Name the technique used to analyse particle size, crystal structure and
geometry of a nanoparticle.
=> x-ray diffraction (XRD)
23➤
Name the analytical technique used to study the morphology (structure of
surface) of a material.
=> Scanning electron microscopy (SEM)
24➤
Which are the sectors that are revolutionalized
=> Ans. Electronics, energy sector and medical fields.
25➤
What are the disadvantages of nanotechnology?
=> Ans. Nano pollution and lung damage.
