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Hydrocarbons NEET Questions. We covered all the Hydrocarbons NEET Questions in this post for free so that you can practice well for the exam.
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MCQ on Hydrocarbons for NEET Students
Which of the following statements is INCORRECT?
(A) The thermite method is used to extract metals whose oxides are not reducible by carbon.
(B) In the Hall-Heroult technique, Al₂O₃ is mixed with Na₃AlF₆ or CaF₂ to reduce the melting point and increase conductivity.
(C) Refining lead involves heating impure lead on a sloped reverberatory hearth above its melting point in the absence of oxygen.
(D) In Mond’s method of purifying nickel, the metal is heated in a stream of carbon dioxide to create a volatile compound.
Option d – In Mond’s method of purifying nickel, the metal is heated in a stream of carbon dioxide to create a volatile compound.
During copper extraction from its sulphide ore, which substance reduces cuprous oxide?
(A) Iron(II) sulphide
(B) Sulphur dioxide
(C) Copper(I) sulphide
(D) Copper monoxide
Option c – Copper(I) sulphide
In the electrolytic extraction of aluminum, what happens if graphite anodes are replaced with metal ones?
(A) Oxygen at the anode would react with aluminum to reform Al₂O₃
(B) No gas would be released at the anode
(C) The process would no longer occur spontaneously
(D) Aluminum would start appearing at the anode
Option a – Oxygen at the anode would react with aluminum to reform Al₂O₃
Which of the following drugs functions as an antihistamine?
(A) Tetracycline
(B) Prontosil
(C) Foristal
(D) Vancomycin
Option c – Foristal
Which of the following statements is NOT TRUE?
(A) Cassiterite and chromite can be separated using hydraulic washing
(B) Pure Al₂O₃ is extracted from bauxite with iron oxide as an impurity using dilute sodium cyanide
(C) Aqueous NaOH and hydrogen are formed as byproducts in chlorine extraction from brine
(D) Silver is recovered as an anionic complex in the leaching method
Option b – Pure Al₂O₃ is extracted from bauxite with iron oxide as an impurity using dilute sodium cyanide
The deterioration of the Taj Mahal by acid rain results in the formation of:
(A) CaCO₃
(B) Ca(OH)₂
(C) CaSO₄
(D) Ca(HCO₃)₂
Option c – CaSO₄
Hydrometallurgy works on the principle of:
(A) Complex ion formation
(B) Hydrolysis
(C) Removal of water
(D) Loss of hydrogen
Option a – Complex ion formation
Which of the following statements about soaps is INCORRECT?
(A) Soaps effectively remove grease and oil in an acidic environment
(B) They do not dissolve well in hard water
(C) Microorganisms in sewage can break them down
(D) Sodium rosinate helps generate more lather in shaving soaps
Option a – Soaps effectively remove grease and oil in an acidic environment
Why is sodium cyanide added during froth floatation of an ore mixture containing ZnS and PbS?
(A) It causes Pb(CN)₂ to precipitate, leaving ZnS unaffected
(B) It forms a soluble Zn complex, Na₂[Zn(CN)₄], while PbS generates froth
(C) PbS forms Na₂[Pb(CN)₄] as a soluble complex, leaving ZnS to froth
(D) Zn(CN)₂ precipitates without affecting PbS
Option b – It forms a soluble Zn complex, Na₂[Zn(CN)₄], while PbS generates froth
Which of the following acts as a bacteriostatic antibiotic?
(A) Penicillin
(B) Aminoglycosides
(C) Erythromycin
(D) Ofloxacin
Option c – Erythromycin
Which oxide of nitrogen is classified as a greenhouse gas?
(A) N₂O
(B) NO
(C) NO₂
(D) N₂O₄
Option a – N₂O
Silver’s sulphide ore is concentrated using which of these methods?
(A) Froth flotation
(B) Gravity separation
(C) Hydraulic washing
(D) MacArthur-Forrest process
Option d – MacArthur-Forrest process
Why don’t nitrogen and oxygen react under normal atmospheric conditions?
(A) Reaction occurs only in the presence of a catalyst
(B) Both gases are inert
(C) The reaction requires a high temperature due to being endothermic
(D) Oxides of nitrogen are unstable
Option c – The reaction requires a high temperature due to being endothermic
A water sample contains 1000 ppb fluoride, 55 ppb lead, 20 ppm nitrate, and 0.3 ppm iron. Why is this water unsuitable for consumption?
(A) Due to excess fluoride and iron
(B) Due to high fluoride and lead content
(C) Due to nitrate and iron
(D) Due to elevated levels of lead and iron
Option d – Due to elevated levels of lead and iron
Which illnesses are caused by exposure to SO₂?
(i) Asthma
(ii) Siderosis
(iii) Bronchitis
(iv) Emphysema
(A) Only (i), (ii), and (iii)
(B) Only (ii), (iii), and (iv)
(C) Only (i), (iii), and (iv)
(D) Only (i) and (iv)
Option c – Only (i), (iii), and (iv)
Which of the following statements is INCORRECT?
(A) Collectors increase mineral particle hydrophobicity in froth flotation
(B) A magnetite-lined reverberatory furnace is used to convert cast iron into wrought iron
(C) In van Arkel’s refining method, the metal must form a volatile compound
(D) Hydrometallurgy is used to extract copper from low-grade ores
Option b – A magnetite-lined reverberatory furnace is used to convert cast iron into wrought iron
When roasted copper pyrite is smelted with coke and sand, what are the resulting products?
(A) Fe₃(PO₄)₂ as slag and Cu₂S as matte
(B) Ca₃(PO₄)₂ as slag and Cu₂S as matte
(C) CaSiO₃ as slag and Cu₂O as matte
(D) FeSiO₃ as slag and Cu₂S as matte
Option d – FeSiO₃ as slag and Cu₂S as matte
Which of the following drugs is effective in treating malaria?
(A) Phenacetin
(B) Primaquine
(C) Novalgin
(D) Terfenadine
Option b – Primaquine
Identify the incorrect statement among the following:
(A) In zinc refining, impure zinc acts as the anode.
(B) Acidified zinc sulphate serves as the electrolyte in zinc purification.
(C) Coke reduces zinc oxide at a lower temperature than it reduces cuprous oxide.
(D) Pure zinc is employed as the cathode during electrolytic purification.
Option c – Coke reduces zinc oxide at a lower temperature than it reduces cuprous oxide.
Which of the following contributes to both ozone layer depletion and the greenhouse effect?
(A) Sulphur dioxide
(B) Carbon dioxide
(C) Chlorofluorocarbons (CFCs)
(D) Nitrogen dioxide
Option c – Chlorofluorocarbons (CFCs)
Which antibiotic includes a nitro group directly attached to its benzene ring?
(A) Chloramphenicol
(B) Penicillin
(C) Tetracycline
(D) Streptomycin
Option a – Chloramphenicol
Which element of photochemical smog interferes with the Hill reaction in photosynthesis?
(A) Ozone
(B) PAN
(C) Formaldehyde
(D) Acrolein
Option b – PAN
Which of the following is classified as an antidepressant drug?
(A) Terfenadine
(B) Nardil
(C) Prontosil
(D) Tetracycline
Option b – Nardil
What method is used to purify gallium arsenide?
(A) Polling
(B) Van Arkel technique
(C) Zone refining
(D) Electrolytic refining
Option c – Zone refining
Select the correct statements regarding photochemical smog:
(i) It forms in sunny, dry, and warm environments.
(ii) It results from sunlight acting on unsaturated hydrocarbons.
(iii) It is referred to as oxidizing smog.
(iv) It consists of smoke, fog, and sulphur dioxide.
(A) Only (i), (ii), and (iv)
(B) Only (ii), (iii), and (iv)
(C) Only (i), (ii), and (iii)
(D) Only (i) and (iii)
Option c – Only (i), (ii), and (iii)
After treating bauxite ore with concentrated sodium hydroxide at high temperature and pressure, which species are found in the filtrate?
(A) NaAl(OH)₄ only
(B) Na₂Ti(OH)₆ only
(C) Na[Al(OH)₄] and Na₂SiO₃
(D) Na₂SiO₃ only
Option c – Na[Al(OH)₄] and Na₂SiO₃
What distinguishes tranquilizers Equanil and Meprobamate?
(A) Total number of carbon atoms
(B) Quantity of quaternary carbon atoms
(C) Number of amine groups
(D) Count of carbonyl functional groups
Option a – Total number of carbon atoms
Which one of the following statements is incorrect?
(A) Drinking water should have a pH range between 5.5 and 9.5.
(B) Dissolved oxygen below 4 ppm supports fish survival.
(C) Severely polluted water may exhibit a BOD of 17 ppm or higher.
(D) Nitrate concentration in safe drinking water should not exceed 50 ppm.
Option b – Dissolved oxygen below 4 ppm supports fish survival.
Which medication helps in preventing blood platelet aggregation?
(A) Morphine
(B) Equanil
(C) Aspirin
(D) Prontosil
Option c – Aspirin
In the extraction of which metal is no reducing agent required?
(A) Iron from haematite
(B) Aluminium from bauxite
(C) Mercury from cinnabar
(D) Zinc from zinc blende
Option c – Mercury from cinnabar
Which set of functional groups is found in the artificial sweetener aspartame?
(A) Ester, peptide, amino, carboxyl
(B) Hydroxy, keto, methoxy
(C) Ester, peptide, keto, amino
(D) Hydroxy, keto, ester
Option a – Ester, peptide, amino, carboxyl
Which of the following statements about the ozone layer is accurate?
(A) Ozone is unstable and decomposes into diatomic oxygen.
(B) CFCs do not impact the ozone layer.
(C) Ozone consists of three atoms in a linear structure.
(D) The ozone layer blocks sunlight beneficial for photosynthesis.
Option a – Ozone is unstable and decomposes into diatomic oxygen.
Which compounds feature an azo (–N=N–) linkage in their structure?
(A) Prontosil and azo dyes
(B) Salvarsan and prontosil
(C) Azo dyes and salvarsan
(D) Only prontosil
Option a – Prontosil and azo dyes
We covered all the hydrocarbons neet questions above in this post for free so that you can practice well for the exam.
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