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Chemistry MCQ

Green Chemistry and Nanochemistry · Maharashtra Board STD 12 (MSBSHSE - Semi English Medium). 58 questions.

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58 questions · 54 auto-graded MCQ + 4 self-marked written.

MCQ 11 Mark
What is the value of percent atom economy if total molar mass of reactants is 36 u and the mass of product is 27 u?
  • A
    0.45
  • B
    0.25
  • ✓
    0.75
  • D
    0.5
Answer
Correct option: C.
0.75
C
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MCQ 21 Mark
Which among following statements is NOT a principle of green chemistry?
  • A
    A To develop technology for zero waste.
  • B
    To give priority for prevention of waste.
  • C
    Effluents of one industry can be used as coolant for thermal power stations.
  • ✓
    It aims to dump waste product formed in one system instead to use as raw material for other system.
Answer
Correct option: D.
It aims to dump waste product formed in one system instead to use as raw material for other system.
D
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MCQ 31 Mark
What is percent atom economy if formula weight of reactants and formula weight of products respectively are 45 u and 35 u?
  • A
    90-0%
  • B
    0.71
  • ✓
    0.778
  • D
    0.805
Answer
Correct option: C.
0.778
C
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MCQ 41 Mark
Which from following polymers is used to obtain bristles for brushes?
  • A
    Nylon 6
  • B
    Polyacrylamide
  • C
    Nylon 2 - nylon 6
  • ✓
    Nylon 6, 6
Answer
Correct option: D.
Nylon 6, 6
D
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MCQ 51 Mark
Which from following polymers is used to obtain electrical and telecommunication hard ware?
  • ✓
    Polycarbonate
  • B
    Thermocol
  • C
    Polyacrylamide
  • D
    Buna$-N$
Answer
Correct option: A.
Polycarbonate
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MCQ 61 Mark
Which among following is a zero dimensional nanostructure?
  • A
    Nanowires
  • ✓
    Nanoparticles
  • C
    Nano rods
  • D
    Thin films
Answer
Correct option: B.
Nanoparticles
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MCQ 71 Mark
Find the formula weight of reactants if the formula weight of product is 54 u and the percent atom economy is 75.
  • A
    30 u
  • B
    24 u
  • C
    80 u
  • ✓
    72 u
Answer
Correct option: D.
72 u
D
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MCQ 81 Mark
Which among the following statements is $\text{NOT}$ true according to principles of green chemistry?
  • A
    Use renewable chemicals rather than crude oil.
  • B
    Use of catalyst minimize waste.
  • C
    Benzene being volatile compound pollutes air.
  • ✓
    Carrying out reactions at high temperature and high pressure minimize use of energy.
Answer
Correct option: D.
Carrying out reactions at high temperature and high pressure minimize use of energy.
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MCQ 91 Mark
The concept of green chemistry was coined by
  • A
    Born Haber
  • B
    Nario Taniguchi
  • C
    Richard Feynman
  • ✓
    Paul T. Anastas
Answer
Correct option: D.
Paul T. Anastas
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MCQ 101 Mark
Which of the following information is given by FTIR technique?
  • ✓
    Absorption of functional groups
  • B
    Particle size
  • C
    Confirmation of formation of nanoparticles
  • D
    Crystal structure
Answer
Correct option: A.
Absorption of functional groups
Absorption of functional groups
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MCQ 111 Mark
The prefix ‘nano’ comes from
  • A
    French word meaning billion
  • ✓
    Greek word meaning dwarf
  • C
    Spanish word meaning particle
  • D
    Latin word meaning invisible
Answer
Correct option: B.
Greek word meaning dwarf
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MCQ 121 Mark
Which of the following is ϒ-isomer of BHC?
  • A
    DDT
  • ✓
    lindane
  • C
    Chloroform
  • D
    Chlorobenzene
Answer
Correct option: B.
lindane
lindane
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MCQ 131 Mark
The development that meets the needs of the present without compromising the ability of future generations to meet their own need is known as
  • A
    Continuous development
  • ✓
    Sustainable development
  • C
    True development
  • D
    Irrational development
Answer
Correct option: B.
Sustainable development
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MCQ 141 Mark
What type of information is collected using scanning electron microscopy?
  • ✓
    Structure of material surface
  • B
    Crystal structure
  • C
    Binding nature
  • D
    Particle size
Answer
Correct option: A.
Structure of material surface
(a) : Scanning electron microscope is a type of electron microscope that produces images by scanning the surface with focused electron beam. The information like structure of material surface is collected by using scanning electron microscopy.
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MCQ 151 Mark
Which from following is an example of two dimensional nanostructures?
  • A
    Nanoparticles
  • ✓
    Thin films
  • C
    Quantum dots
  • D
    Nanowires
Answer
Correct option: B.
Thin films
(b): Thin films is an example of two dimensional nanostructures.
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MCQ 161 Mark
Which among the following is an example of 2-dimensional nanostructure?
  • A
    Nanorings
  • B
    Nanowires
  • C
    Microcapsules
  • ✓
    Thin films
Answer
Correct option: D.
Thin films
(d): Thin films, layers and coatings are examples of two-dimensional nanostructures.
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MCQ 171 Mark
Which among the following statements is not a principle of green chemistry?
  • A
    To give priority to prevention of waste.
  • ✓
    It aims to use waste product formed in one system as raw material for another system.
  • C
    To develop technology for zero waste.
  • D
    Effluents of one industry can be used as coolant for thermal power stations.
Answer
Correct option: B.
It aims to use waste product formed in one system as raw material for another system.
(b) It aims to use waste product formed in one system as raw material for another system.
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MCQ 181 Mark
Which of the following is used as antiseptic?
  • A
    Chloramphenicol
  • ✓
    Bithional
  • C
    Cimetidine
  • D
    Chlordiazepoxide
Answer
Correct option: B.
Bithional
(b) : Bithional is an antiseptic and is added to soaps to reduce the odour produced by bacterial decomposition of organic matter on the skin.
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MCQ 191 Mark
Which of the following processes is not used to preserve the food?
  • A
    Irradiation
  • B
    Addition of salts
  • C
    Addition of heat
  • ✓
    Hydration
Answer
Correct option: D.
Hydration
(d) : Irradiation, addition of salts and addition of heat are the methods used to preserve the food.
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MCQ 201 Mark
Butylated hydroxy anisole is
  • ✓
    an antioxidant
  • B
    cleansing agent
  • C
    disinfectant
  • D
    an antihistamine.
Answer
Correct option: A.
an antioxidant
(a) : Butylated hydroxy anisole (BHA) is an antioxidant which is added in processed foods to prevent the oxidation of fats.
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MCQ 211 Mark
Which of the following is an analgesic?
  • A
    Ofloxacin
  • B
    Penicillin
  • C
    Aminoglycosides
  • ✓
    Paracetamol
Answer
Correct option: D.
Paracetamol
(d): Analgesics are the medicines which relieve or decrease pain e.g., paracetamol.
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MCQ 221 Mark
Which among the following detergents is non-ionic in character?
  • A
    Sodium laurylsulphate
  • ✓
    Pentaerythrityl stearate
  • C
    Cetyltrimethylammonium chloride
  • D
    Sodium $n$-dodecylbenzenesulphonate
Answer
Correct option: B.
Pentaerythrityl stearate
(b) : Non-ionic detergents are esters of high molecular mass alcohols with stearic acid.
Sodium laurylsulphate - Anionic detergent
$
CH _3\left( CH _2\right)_{10} CH _2 OSO _3{ }^{-} Na ^{+}
$
Pentaerythrityl stearate - Non-ionic detergent
Cetyltrimethylammonium chloride - Cationic detergent
$
\left[ CH _3\left( CH _2\right)_{15} N \left( CH _3\right)_3\right]^4 Cl ^{-}
$
Sodium $n$-dodecylbenzenesulphonate - Anionic detergent
$
CH _3\left( CH _2\right)_{11} C _6 H _4 SO _3{ }^{-} Na ^{+}
$
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MCQ 231 Mark
Which among the following is a tranquilizer?
  • A
    Aspirin
  • ✓
    Valium
  • C
    Penicillin
  • D
    Sulphanilamide
Answer
Correct option: B.
Valium
(b) : Aspirin - Analgesic, Valium - Tranquilizer
Penicillin - Antibiotic, Sulphanilamide - Antimicrobial
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MCQ 241 Mark
Butylated hydroxytoluene is used in
  • ✓
    preventing oxidative rancidity of fats
  • B
    preserving food grains
  • C
    killing bacteria in living tissues
  • D
    reducing stress and anxiety.
Answer
Correct option: A.
preventing oxidative rancidity of fats
(a): Butylated hydroxytoluene (BHT) is used as antioxidant preservative.
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MCQ 251 Mark
The pollution caused by nanotechnology is known as
  • A
    air pollution
  • B
    nano pollution
  • C
    ground pollution
  • D
    environmental pollution
Answer
nano pollution.
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MCQ 261 Mark
Name the body part that gets affected by the hazardous nano pollution.
  • A
    heart
  • B
    brain
  • ✓
    lungs
  • D
    eyes
Answer
Correct option: C.
lungs
lungs
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MCQ 271 Mark
The sectors revolutionalized by nanotechnology are
  • A
    electronics and computing
  • B
    energy
  • C
    medicine
  • ✓
    All of the above
Answer
Correct option: D.
All of the above
All of the above
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MCQ 281 Mark
Which highly effective and cost effective nano-particles are used for water purification ?
  • A
    gold nanoparticle
  • B
    copper nanoparticle
  • ✓
    silver nanoparticle
  • D
    silica nanoparticle
Answer
Correct option: C.
silver nanoparticle
silver nanoparticle
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MCQ 291 Mark
Self cleansing windows are example of the
  • A
    Nanoparticle effect
  • B
    Crompton effect
  • C
    Lotus effect
  • ✓
    Lotus effect
Answer
Correct option: D.
Lotus effect
Lotus effect
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MCQ 301 Mark
The constituents of carbon nanotubes are
  • ✓
    nanosized graphite sheets
  • B
    nanosized carbon black
  • C
    nanosized coal black
  • D
    None of the above
Answer
Correct option: A.
nanosized graphite sheets
nanosized graphite sheets
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MCQ 311 Mark
The analytical tool used to study the structure of surface of nanoparticle i.e. morphology is
  • A
    Absorption spectroscopy
  • ✓
    Scanning electron microscopy
  • C
    Emission spectroscopy
  • D
    Nuclear magnetic resonance spectroscopy
Answer
Correct option: B.
Scanning electron microscopy
Scanning electron microscopy
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MCQ 321 Mark
What information of the nanoparticles is obtained from transmission electron microscopy technique ?
  • A
    structure
  • B
    functional group
  • ✓
    particle size
  • D
    geometry
Answer
Correct option: C.
particle size
particle size
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MCQ 331 Mark
What is the information obtained from uv-visible spectroscopy when used for nanomaterials ?
  • A
    morphology of structure
  • ✓
    preliminary conformation of formation of nanoparticle
  • C
    particle size
  • D
    functional group present
Answer
Correct option: B.
preliminary conformation of formation of nanoparticle
preliminary conformation of formation of nanoparticle
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MCQ 341 Mark
The most common method used for synthesis of nanomaterials is
  • ✓
    sol-gels method
  • B
    only sol method
  • C
    only gel method
  • D
    colloidal dispersion method
Answer
Correct option: A.
sol-gels method
sol-gels method
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MCQ 351 Mark
Nanosized copper clusters have the mechanical strength of
  • A
    less than the bulk copper wire
  • B
    $100 \%$ more than the bulk metal
  • C
    $200 \%$ more than the bulk metal
  • ✓
    $500 \%$ more than the bulk metal
Answer
Correct option: D.
$500 \%$ more than the bulk metal
$500 \%$ more than the bulk metal
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MCQ 361 Mark
The catalyst used in photocatalysis is
  • A
    gold
  • B
    Raney Ni
  • ✓
    $TiO _2$
  • D
    $Al _2 O _3$
Answer
Correct option: C.
$TiO _2$
$TiO _2$
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MCQ 371 Mark
The nanomaterial based catalyst are usually
  • A
    homogeneous catalyst
  • ✓
    heterogeneous catalyst
  • C
    good catalyst
  • D
    bad catalyst
Answer
Correct option: B.
heterogeneous catalyst
heterogeneous catalyst
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MCQ 381 Mark
The surface area of nanoparticles
  • A
    is the same as in bulk
  • ✓
    increases with the same volume of the bulk
  • C
    decreases with the same volume of the bulk
  • D
    does not change with particle size
Answer
Correct option: B.
increases with the same volume of the bulk
increases with the same volume of the bulk
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MCQ 391 Mark
Elemental has a shining yellow colour, but the colour of nanoparticles of gold is
  • A
    green
  • B
    yellow
  • ✓
    red
  • D
    blue
Answer
Correct option: C.
red
red
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MCQ 401 Mark
The science which deals with the design and synthesis of material on nanoscale with different size and shape is called
  • A
    nanoscience
  • ✓
    nanochemistry
  • C
    nanophysics
  • D
    nanotechnology
Answer
Correct option: B.
nanochemistry
nanochemistry
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MCQ 411 Mark
Nanomaterials of zero dimension is
  • ✓
    one in which all three dimensions are in the nanoscale
  • B
    one in which two dimensions are in the nanoscale
  • C
    one in which one dimension is in the nanoscale
  • D
    None of the above
Answer
Correct option: A.
one in which all three dimensions are in the nanoscale
one in which all three dimensions are in the nanoscale
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MCQ 421 Mark
The material synthesized on the nanometer scale possess
  • A
    same bulk properties
  • B
    different bulk properties
  • ✓
    unique optical, magnetic, electrical properties
  • D
    no change in properties
Answer
Correct option: C.
unique optical, magnetic, electrical properties
unique optical, magnetic, electrical properties
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MCQ 431 Mark
The nanometer scale is conventionally defined as
  • A
    10 – 100nm
  • B
    1 – 100nm
  • C
    1 – 1000 nm
  • D
    1 – 10000 nm
Answer
1-100 nm
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MCQ 441 Mark
Which of the historical works mentioned below contain nanotechnology?
  • A
    Lycurgus cup
  • B
    Medieval stained glass windows in churches
  • C
    Damascus steel swords
  • ✓
    All of the above
Answer
Correct option: D.
All of the above
All of the above
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MCQ 451 Mark
Which one of these statements is NOT true ?
  • A
    Gold at the nanoscale is red.
  • B
    A very highly useful application of nanochem¬istry is medicine.
  • ✓
    Sunscreen contains nanoparticles of zinc oxide (ZnO) and (SiO2) silicon oxide.
  • D
    Silicon at nanoscale is not an insulator
Answer
Correct option: C.
Sunscreen contains nanoparticles of zinc oxide (ZnO) and (SiO2) silicon oxide.
Sunscreen contains nanoparticles of zinc oxide (ZnO) and (SiO2) silicon oxide.
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MCQ 461 Mark
The term nanotechnology was first used by whom and when ?
  • A
    Richard Feynman, 1959
  • ✓
    Nario Taniguchi, 1974
  • C
    Eric Drexter, 1986
  • D
    Sumia Lijima, 1991
Answer
Correct option: B.
Nario Taniguchi, 1974
Nario Taniguchi, 1974
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MCQ 471 Mark
The study of phenomena and manipulation of materials of atomic, molecular and macromolecular scales where properties differ significantly from those at a large scale is called
  • ✓
    nanoscience
  • B
    nanochemistry
  • C
    nanotechnology
  • D
    nanomaterial
Answer
Correct option: A.
nanoscience
nanoscience
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MCQ 481 Mark
The role of green chemistry aims to
  • A
    design chemical processes and products that maximize profits
  • B
    design safer chemicals and products by reduc¬ing or eliminating the use and generation of hazardous substances
  • C
    design processes and products that work efficiently
  • D
    utilize non-renewable feedstocks
Answer
design safer chemicals and products by reducing or eliminating the use and generation of hazardous substances
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MCQ 491 Mark
The plastic ketch-up bottles and syrup bottles made from polypropylene (pp) can be recycled to make
  • ✓
    battery cables, brooms, ice scrapers, rakes
  • B
    envelopes, floor tiles, lumber
  • C
    custom-made products
  • D
    carpet, furniture, new containers
Answer
Correct option: A.
battery cables, brooms, ice scrapers, rakes
battery cables, brooms, ice scrapers, rakes
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MCQ 501 Mark
The plastic bottles made of HDPE are used to store household cleaner and shampoo can be recycled to make
  • A
    carpets, furniture, new containers
  • B
    carpets, furniture, new containers
  • C
    custom-made products
  • D
    cables, mudflaps, panelling, roadway gutters
Answer
detergent bottles, fencing, floor tiles, pens
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MCQ 511 Mark
Chemical synthesis based on principle of green chemistry encourages the use of
  • A
    hazardous chemicals
  • B
    reactions with low atom efficiency
  • ✓
    catalyst
  • D
    high energy requirements
Answer
Correct option: C.
catalyst
catalyst
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MCQ 521 Mark
Which of the following is not one of the twelve principles of green chemistry ?
  • A
    using renewable feedstocks
  • B
    designing safer chemicals and products
  • C
    maximizing atom economy
  • ✓
    avoiding the use of catalysts
Answer
Correct option: D.
avoiding the use of catalysts
avoiding the use of catalysts
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MCQ 531 Mark
According to the principles of green chemistry the chemicals involved in the production must be
  • ✓
    non-hazardous
  • B
    toxic
  • C
    polluting
  • D
    highly toxic
Answer
Correct option: A.
non-hazardous
non-hazardous
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MCQ 541 Mark
The chemistry that applies across the life cycle of a chemical product like design, manufacture and use is called
  • A
    eco-friendly chemistry
  • ✓
    green chemistry
  • C
    environmental chemistry
  • D
    inorganic chemistry
Answer
Correct option: B.
green chemistry
green chemistry
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MCQ 551 Mark
Chemical synthesis should be designed to mini-mizes the use of
  • A
    liquid fuels
  • B
    solid fuels
  • C
    gaseous fuels
  • ✓
    energy
Answer
Correct option: D.
energy
energy
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MCQ 561 Mark
Green chemistry reduces risk by
  • A
    developing the process for reuse and recycle of solvents and chemicals
  • B
    inventing technologies to clean the environ-ment
  • C
    minimize the use of chemicals
  • ✓
    reducing or eliminating the use or generation of hazardous chemicals in chemical products and process
Answer
Correct option: D.
reducing or eliminating the use or generation of hazardous chemicals in chemical products and process
reducing or eliminating the use or generation of hazardous chemicals in chemical products and process
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MCQ 571 Mark
The atom economy of the following reaction is $CH _3- CH _2- CH _2- CH _2- OH + NaBr + H _2 SO _4 \rightarrow$ $CH _3- CH _2- CH _2- CH _2- Br + NaHSO _4+ H _2 O$
  • ✓
    $49.81 \%$
  • B
    $49 \%$
  • C
    $50 \%$
  • D
    $100 \%$
Answer
Correct option: A.
$49.81 \%$
$49.81 \%$
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MCQ 581 Mark
The measure of the amount of atoms from the starting materials that are present in the useful product at the end of chemical process is known as
  • A
    catalyst
  • ✓
    atom economy
  • C
    design of safer chemicals
  • D
    design for efficient energy
Answer
Correct option: B.
atom economy
atom economy
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