Start learning →

MHT-CET Green Chemistry and Nanochemistry — practice questions — page 2

Explore 64 free Green Chemistry and Nanochemistry questions in MHT-CET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

Practise Green Chemistry and Nanochemistry with Quill →

Green Chemistry and Nanochemistry questions and exercises with answers

Showing questions 31–60 of 64.

Green chemistry helps protect which layer essential for life on earth?Read the answer and worked solution →Which process is safer for accident prevention than a gaseous one?Read the answer and worked solution →The nanometer scale is conventionally defined as what range?Read the answer and worked solution →One nanometer equals how many metres?Read the answer and worked solution →In Greek, the word nano means what?Read the answer and worked solution →Nanoscience studies phenomena and manipulation of materials at which scales?Read the answer and worked solution →Nanotechnology controls which features of structures?Read the answer and worked solution →A nanomaterial has at least one dimension in which range?Read the answer and worked solution →Which is an example of a zero-dimensional nanostructure?Read the answer and worked solution →A nanowire is classified as which kind of nanostructure?Read the answer and worked solution →Which sunscreen ingredients are nanoparticles of metal oxides?Read the answer and worked solution →Why are nanoparticles more reactive than the same bulk material?Read the answer and worked solution →A cube of side 1 m has surface area 6 m2. If it is cut into eight cubes of side 0.5 m, what is the total surface area?Read the answer and worked solution →A 1 m cube is cut into 27 cubes of side one third metre. What total surface area results?Read the answer and worked solution →Which metal nanoparticles are used in hydrogenation reactions?Read the answer and worked solution →Bulk gold is unreactive, but gold nanoparticles act as what?Read the answer and worked solution →Which two compounds are named as photocatalysts?Read the answer and worked solution →A sodium cluster of 1000 atoms melts near 288 K. Bulk sodium melts at what temperature?Read the answer and worked solution →Which nanomaterial can behave as a conductor or a semiconductor?Read the answer and worked solution →Which two approaches are used to synthesize nanomaterials?Read the answer and worked solution →In the top-down approach, nanomaterials are made from what?Read the answer and worked solution →Which synthesis is an example of the bottom-up approach?Read the answer and worked solution →The sol-gel process is widely used to prepare which kind of materials?Read the answer and worked solution →Sol-gel hydrolysis converts metal alkoxide MOR and water into which pair?Read the answer and worked solution →In the sol-gel process, the dehydration step heats the material to temperatures up to what?Read the answer and worked solution →Which technique gives preliminary confirmation of formation of nanoparticles?Read the answer and worked solution →Which technique studies surface morphology of nanomaterials?Read the answer and worked solution →FTIR spectroscopy of nanomaterials reveals absorption by what?Read the answer and worked solution →Who defined the term nanotechnology in 1974?Read the answer and worked solution →The ruby red colour in some ancient glass paintings is due to what?Read the answer and worked solution →

Worked practice questions

Green chemistry helps protect which layer essential for life on earth?

  1. Stratospheric ozone
  2. Ionosphere layer
  3. Tropospheric ozone
  4. Mesosphere layer
Show answer and solution

Correct answer: A. Stratospheric ozone

By reducing harmful emissions, green chemistry protects the stratospheric ozone that shields life.

Open this question →

Which process is safer for accident prevention than a gaseous one?

  1. One with gaseous reagents
  2. One using non-volatile liquids
  3. One using volatile solvents
  4. One run close to flash point
Show answer and solution

Correct answer: B. One using non-volatile liquids

Gases carry a higher explosion risk, so non-volatile liquids and solids reduce chances of accidents.

Open this question →

The nanometer scale is conventionally defined as what range?

  1. 0.1 to 1 nm
  2. 1 to 100 nm
  3. 100 to 1000 nm
  4. 1 to 100 µm
Show answer and solution

Correct answer: B. 1 to 100 nm

By convention the nanoscale covers sizes from 1 nm to 100 nm.

Open this question →

How to practise

  1. Choose a Green Chemistry and Nanochemistry question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Chemistry topics

ElectrochemistrySolutionsCoordination CompoundsChemical KineticsChemical Bonding and Molecular StructureAldehydes, Ketones and Carboxylic AcidsHydrocarbonsStructure of Atom