datavorous/entrance-exam-dataset huggingface dataset:
Which metal catalyzes the reaction between iodide and persulphate ions?

Options:
A Vanadium(V) oxide
B Iron(II) oxide
C Iron(III)
D Nickel

The correct answer is:
Iron(III)

Solution:
Iron(III) catalyses the reaction between iodide and persulphate ions.

Topic: Chemistry, d and f Block Elements, NEET
Which metal causes LiCl crystals to appear pink and KCl crystals to appear violet (or lilac) due to metal excess defects?

Options:
A Sodium
B Lithium
C Potassium
D Zinc

The correct answer is:
Potassium

Solution:
Excess of potassium makes KCl crystals violet (or lilac), resulting from metal excess defects.

Topic: Chemistry, Solid State, NEET
Which metal does beryllium resemble to in some ways?

Options:
A Magnesium
B Sodium
C Aluminum
D Calcium

The correct answer is:
Aluminum

Solution:
Beryllium resembles aluminium in some ways.

Topic: Chemistry, s Block Elements, NEET
Which metal has a trihalide beyond Mn in the 3d series of transition metals?

Options:
A Ti
B V
C Cr
D Fe

The correct answer is:
Fe

Solution:
Beyond Mn, no metal has a trihalide except FeX3.

Topic: Chemistry, d and f Block Elements, NEET
Which metal has the highest negative enthalpy of hydration?

Options:
A Titanium
B Vanadium
C Chromium
D Nickel

The correct answer is:
Nickel

Solution:
For nickel, Eo value is related to the highest negative enthalpy of hydration.

Topic: Chemistry, d and f Block Elements, NEET
Which metal hydroxide precipitates when ammonia reacts with some metals' salt solutions?

Options:
A Sodium hydroxide (NaOH)
B Potassium hydroxide (KOH)
C Zinc hydroxide (Zn(OH)2)
D Iron hydroxide (Fe(OH)3)

The correct answer is:
Zinc hydroxide (Zn(OH)2)

Solution:
The paragraph provides a chemical equation indicating the precipitation of zinc hydroxide when ammonia reacts with zinc sulfate solution.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which metal in the first series is an exception and not relatively more reactive?

Options:
A Copper
B Titanium
C Vanadium
D Nickel

The correct answer is:
Copper

Solution:
The metals of the first series, with the exception of copper, are relatively more reactive.

Topic: Chemistry, d and f Block Elements, NEET
Which metal in the first series of transition metals exhibits +1 oxidation state most frequently and why?

Options:
A Iron (Fe) because it has the highest atomic number in the series.
B Copper (Cu) because it readily loses one electron (present in 4s orbital) to give stable 3d10electronic configuration.
C Scandium [SC] because it has the lowest ionization energy in the series.
D Chromium (Cr) because it readily loses electrons.

The correct answer is:
Copper (Cu) because it readily loses one electron (present in 4s orbital) to give stable 3d10electronic configuration.

Solution:
Correct Option is : (B)
Copper (Cu) because it readily loses one electron (present in 4s orbital) to give stable 3d10electronic configuration.

Topic: Chemistry, d and f Block Elements, NEET
Which metal in the group from Be to Ba is likely to have the highest melting and boiling points?

Options:
A Beryllium (Be)
B Magnesium (Mg)
C Calcium (Ca)
D Barium (Ba)

The correct answer is:
Barium (Ba)

Solution:
Barium (Ba) is likely to have the highest melting and boiling points among the group from Be to Ba due to its larger atomic size and increased metallic bonding.

Topic: Chemistry, s Block Elements, NEET
Which metal inactivates a catalytic converter?

Options:
A Gold
B Lead
C Silver
D Iron

The correct answer is:
Lead

Solution:
Catalytic converters are made using expensive metals like platinum, palladium and rhodium. These acts as the catalysts are fitted into automobiles to reduce the emission of poisonous gases. These noble metal catalysts are poisoned by the use of lead.

Topic: Biology, Environmental Issues, NEET
Which metal ion is mentioned as being reduced by dihydrogen in aqueous solution to form the corresponding metal?

Options:
A Pd2+
B Cu2+
C Fe3+
D Zn2+

The correct answer is:
Pd2+

Solution:
Dihydrogen can reduce Pd2+ ions in aqueous solution to form the corresponding metal, palladium (Pd).

Topic: Chemistry, Hydrogen, NEET
Which metal ion is oxidized by Cu2+ to form I2?

Options:
A Cu+
B I-
C Cu2+
D Cu2I2

The correct answer is:
I-

Solution:
Cu2+ oxidizes I- to I2.

Topic: Chemistry, d and f Block Elements, NEET
Which metal ion(s) among d4 ions exhibit maximum spin pairing in coordination compounds?

Options:
A Cr2+
B Mn2+
C Fe2+
D Ni2+

The correct answer is:
Cr2+

Solution:
Cr2+ with d4 electronic configuration exhibits maximum spin pairing in coordination compounds.

Topic: Chemistry, Coordination Compounds, NEET
Which metal ions are mentioned in the paragraph as examples of metal ions that form complexes with ammonia?

Options:
A Na+ and K+
B Cu2+ and Ag+
C Fe3+ and Al3+
D Mg2+ and Ca2+

The correct answer is:
Cu2+ and Ag+

Solution:
The paragraph specifically mentions Cu2+ and Ag+ as examples of metal ions that form complexes with ammonia.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which metal is as an example of a catalyst in Catalytic Hydrogenation?

Options:
A Vanadium(V) oxide
B Iron(III)
C Nickel
D Vanadium(III) oxide

The correct answer is:
Nickel

Solution:
Nickel is an example of a catalyst in Catalytic Hydrogenation.

Topic: Chemistry, d and f Block Elements, NEET
Which metal is commonly used in Lindlar's catalyst for the partial reduction of alkynes?

Options:
A Gold
B Silver
C Palladium
D Platinum

The correct answer is:
Palladium

Solution:
Palladium is the metal commonly used in Lindlar's catalyst for the partial reduction of alkynes.

Topic: Chemistry, Hydrocarbons, NEET
Which metal is given as an example of a sacrificial electrode that can be used to prevent corrosion?

Options:
A Silver
B Magnesium
C Copper
D Nickel

The correct answer is:
Magnesium

Solution:
Using a sacrificial electrode of another metal like "Mg" prevent corrosion.

Topic: Chemistry, Electrochemistry, NEET
Which metal is protected by layer of its own oxide?

Options:
A Gold
B Aluminium
C Copper
D Iron

The correct answer is:
Aluminium

Solution:
Aluminium is protected due formation of a layer of Al2O3 on its surface.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which metal is required in the battery industry along with Zn?

Options:
A Gold
B Copper
C steel
D Cadmium or Nickel

The correct answer is:
Cadmium or Nickel

Solution:
The battery industry also requires Zn and Ni/Cd.

Topic: Chemistry, d and f Block Elements, NEET
Which metal is required in the production of polyethylene?

Options:
A Chromium (Cr)
B Vanadium (V)
C Palladium (Pd)
D Titanium (Ti)

The correct answer is:
Titanium (Ti)

Solution:
The paragraph mentions that TiCl4 with Al(CH3)3 is used for the production of polyethylene.

Topic: Chemistry, d and f Block Elements, NEET
Which metal is used as a catalyst in the Contact Process?

Options:
A Vanadium(V) oxide
B Finely divided iron
C Nickel
D Vanadium(III) oxide

The correct answer is:
Vanadium(V) oxide

Solution:
The transition metals and their compounds are known for their catalytic activity. This activity is ascribed to their ability to adopt multiple oxidation states and to form complexes. Vanadium(V) oxide (in Contact Process), finely divided iron (in Haber’s Process), and nickel (in Catalytic Hydrogenation) are some of the examples.

Topic: Chemistry, d and f Block Elements, NEET
Which metal is used as the anode in the industrial process for converting impure copper into high-purity copper?

Options:
A Copper
B Aluminum
C Silver
D Magnesium

The correct answer is:
Copper

Solution:
In the industrial process for converting impure copper into high-purity copper, copper is used as the anode.

Topic: Chemistry, Electrochemistry, NEET
Which metal might also undergo refining in a similar manner as copper?

Options:
A Zinc
B Aluminum
C Iron
D Nickel

The correct answer is:
Zinc

Solution:
The paragraph suggests that zinc might also be refined in a similar manner as copper, recovering valuable elements from the anode mud.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which metal sulphide is soluble in excess NH3 solution?

Options:
A ZnS
B MnS
C FeS
D Cr2S3

The correct answer is:
Cr2S3

Solution:
Here Cr2S3 is soluble in excess of ammonia while ZnS, MnS, FeS do not dissolve in excess NH3 solution due to their low Ksp values.
Cr2S3+6NH3⇌[Cr(NH3)6]3++S2-(aq)

Topic: Chemistry, Ionic Equilibrium, NEET
Which metallic fluorides are suitable for the synthesis of alkyl fluorides?

Options:
A AgCl, Hg2Cl2, CoCl2, and SbCl3
B AgF, Hg2F2, CoF2, and SbF3
C AgBr, Hg2Br2, CoBr2, and SbBr3
D AgI, Hg2I2, CoI2, and SbI3

The correct answer is:
AgF, Hg2F2, CoF2, and SbF3

Solution:
Metallic fluorides such as AgF, Hg2F2, CoF2, and SbF3 are suitable for the synthesis of alkyl fluorides.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Which metals are mentioned as alloying metals for iron and steels?

Options:
A Copper and nickel
B Chromium, manganese, and nickel
C Gold and silver
D Titanium and zinc

The correct answer is:
Chromium, manganese, and nickel

Solution:
Some alloying metals are Cr, Mn, and Ni.

Topic: Chemistry, d and f Block Elements, NEET
Which metals are mentioned as components of coordination compounds used in electroplating?

Options:
A Sodium and potassium
B Gold and silver
C Iron and copper
D Transition metals

The correct answer is:
Transition metals

Solution:
The paragraph doesn't specify the elements used in electroplating, but coordination compounds involving transition metals are commonly used in electroplating processes.

Topic: Chemistry, Coordination Compounds, NEET
Which metals are mentioned as components of vital biological compounds?

Options:
A Sodium and potassium
B Calcium and magnesium
C Iron and copper
D Gold and silver

The correct answer is:
Iron and copper

Solution:
The paragraph specifies that iron and copper are components of vital biological compounds, such as haemoglobin.

Topic: Chemistry, Coordination Compounds, NEET
Which metals are NOT attacked by concentrated nitric acid as mentioned in the paragraph?

Options:
A Copper and zinc
B Gold and platinum
C Iron and aluminum
D Silver and lead

The correct answer is:
Gold and platinum

Solution:
The paragraph states that concentrated nitric acid is a strong oxidizing agent and attacks most metals except noble metals such as gold and platinum.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which metals are referred to as strong reducing agents?

Options:
A Mn3+ and Co3+
B Ti2+ and V2+
C Cr2+ and Ni
D Cu and Zn

The correct answer is:
Ti2+ and V2+

Solution:
Ti2+ and V2+ ions are strong reducing agents.

Topic: Chemistry, d and f Block Elements, NEET
Which metals are strong reducing agents?

Options:
A Manganese and zinc
B Titanium and copper
C Vanadium and nickel
D Chromium and cobalt

The correct answer is:
Vanadium and nickel

Solution:
Titanium and vanadium are strong reducing agents.

Topic: Chemistry, d and f Block Elements, NEET
Which metals are unaffected by single acids?

Options:
A Copper and nickel
B Copper and zinc
C Chromium and manganese
D Titanium and vanadium

The correct answer is:
Copper and zinc

Solution:
Some metals are 'noble' and are unaffected by single acids, including copper and zinc.

Topic: Chemistry, d and f Block Elements, NEET
Which metals benefit from zone refining due to their semiconductor properties?

Options:
A Copper and aluminum
B Silver and gold
C Silicon and germanium
D Iron and nickel

The correct answer is:
Silicon and germanium

Solution:
Zone refining is useful for producing high-purity semiconductor metals like silicon and germanium.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which metals can be prepared as colloidal sols using Bredig’s Arc method?

Options:
A Iron and copper
B Gold, silver, and platinum
C Aluminium and zinc
D Mercury and lead

The correct answer is:
Gold, silver, and platinum

Solution:
Colloidal sols of metals such as gold, silver, and platinum can be prepared using Bredig’s Arc method.

Topic: Chemistry, Surface Chemistry, NEET
Which metals can form alloys with aluminum?

Options:
A Cu and Mn
B Mg and Si
C Cu, Mn, Mg, Si, and Zn
D Zn and Si

The correct answer is:
Cu, Mn, Mg, Si, and Zn

Solution:
Aluminum forms alloys with Cu, Mn, Mg, Si, and Zn.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which metals crystallize in the cubic close-packed (ccp) or face-centered cubic (fcc) structure?

Options:
A Iron and copper
B Gold and silver
C Magnesium and zinc
D Aluminum and titanium

The correct answer is:
Gold and silver

Solution:
Metals such as gold and silver crystallize in the cubic close-packed (ccp) or face-centered cubic (fcc) structure.

Topic: Chemistry, Solid State, NEET
Which metals exhibit the hexagonal close-packed (hcp) structure?

Options:
A Iron and copper
B Gold and silver
C Magnesium and zinc
D Aluminum and titanium

The correct answer is:
Magnesium and zinc

Solution:
The hexagonal close-packed (hcp) structure is found in many metals like magnesium and zinc.

Topic: Chemistry, Solid State, NEET
Which metals form MO oxides that are generally ionic?

Options:
A Scandium
B All metals except scandium
C Group 7 metals
D Iron

The correct answer is:
All metals except scandium

Solution:
All the metals except scandium form MO oxides which are ionic.

Topic: Chemistry, d and f Block Elements, NEET
Which metals have Eo values that are more negative than expected from the general trend?

Options:
A Titanium, vanadium, and chromium
B Manganese, nickel, and zinc
C Copper, titanium, and vanadium
D Nickel, zinc, and copper

The correct answer is:
Manganese, nickel, and zinc

Solution:
The Eo values for Mn, Ni, and Zn are more negative than expected from the general trend.

Topic: Chemistry, d and f Block Elements, NEET
Which method can be used to find out the strength of a reductant/oxidant in a solution?

Options:
A Titration
B Gravimetric analysis
C Spectroscopy
D Chromatography

The correct answer is:
Titration

Solution:
Correct Option is : (A)
Titration

Topic: Chemistry, Redox Reactions, NEET
Which method is commonly employed for refining nickel, particularly in the production of high-purity nickel powders?

Options:
A Distillation of nickel ore
B Fractional Crystallization of nickel compounds
C Electrolytic Refining of nickel cathodes (Mond's Process)
D Zone Refining of nickel

The correct answer is:
Electrolytic Refining of nickel cathodes (Mond's Process)

Solution:
Correct Option is : (C)
Electrolytic Refining of nickel cathodes (Mond's Process)

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which method is used for concentration of bauxite ore

Options:
A Froth flotation
B Electromagnetic separation
C Chemical separation
D Hydraulic separation

The correct answer is:
Chemical separation

Solution:
Chemical separation or Leaching. In this powdered ore is treated with a suitable reagent which can dissolve the ore but not the impurities.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which method is used for refining Zr and Ti?

Options:
A Van Arkel method is used for refining Zr and Ti.
B Mond’s process is used for refining Zr and Ti.
C Hall-Heroult process is used for refining Zr and Ti.
D Liquation is used for refining Zr and Ti.

The correct answer is:
Van Arkel method is used for refining Zr and Ti.

Solution:
Correct Option is : (A)
Van Arkel method is used for refining Zr and Ti.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which method is used to balance redox reactions by first balancing the two half-equations separately and then combining them?

Options:
A Stoichiometry Method
B Half Reaction Method
C Oxidation-Reduction Method
D Precipitation Method

The correct answer is:
Half Reaction Method

Solution:
The "Half Reaction Method" is a technique for balancing redox reactions.

Topic: Chemistry, Redox Reactions, NEET
Which method is used to describe electron shifts in chemical reactions involving covalent compounds?

Options:
A Ionization method
B Oxidation-reduction method
C Electronegativity method
D Lewis dot method

The correct answer is:
Oxidation-reduction method

Solution:
The passage mentions the use of oxidation numbers to describe electron shifts in chemical reactions involving covalent compounds, which is also known as the oxidation-reduction method or redox method.

Topic: Chemistry, Redox Reactions, NEET
Which method is used to keep track of electron shifts in chemical reactions involving the formation of covalent compounds?

Options:
A Ionization
B Oxidation number
C Electronegativity
D Reduction potential

The correct answer is:
Oxidation number

Solution:
The passage mentions the use of oxidation numbers to keep track of electron shifts in such reactions.

Topic: Chemistry, Redox Reactions, NEET
Which method is used to separate sugars?

Options:
A Fractional crystallisation
B Sublimation
C Chromatography
D Benedict's reagent

The correct answer is:
Chromatography

Solution:
Chromatography method is used to separate sugars.They are separated by the chromatographic adsorption of their coloured esters.

Topic: Chemistry, General Organic Chemistry, NEET
Which method of expressing concentration is independent of temperature?

Options:
A Mass percentage
B Molality
C Mole fraction
D Molarity

The correct answer is:
Molality

Solution:
The paragraph mentions that mass percentage, ppm, mole fraction, and molality are independent of temperature, whereas molarity is temperature-dependent.

Topic: Chemistry, Solutions, NEET
Which method of purification is represented by the following equation.

Ni+4 CO â Î 70 â o C Ni CO 4 â Î 180 â o C Ni+4 CO

Options:
A Van arkel process
B Zone refining
C Mond's process
D Cuppellation

The correct answer is:
Mond's process

Solution:
It is mond process used for purification of Ni using carbon monoxide.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which method of purification is represented by the following equations
Ti impure +2 I 2 → Δ 523 K TiI 4 → Δ 1700 K Ti pure +2 I 2

Options:
A Cupellation
B Poling
C Van Arkel method
D Zone refining

The correct answer is:
Van Arkel method

Solution:
Ti metal is purified by Van Arkel method.
In this method impure Ti is converted into pure titanium metal.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which methods of birth control need a prescription?

Options:
A Birth control pill
B Condoms
C Spermicides
D Diaphragm

The correct answer is:
Birth control pill

Solution:
Contraceptives are birth control methods and thus couples can avoid unwanted pregnancies. This in turn will help to stabilize the increasing population especially in a country like India. There are various methods of contraception like, barrier methods, intrauterine methods, oral pills, injection, implants etc. Barrier methods provide contraception by blocking the passage of sperms. These are self inserted and no doctor prescription is needed. Examples: condoms, femidoms, cervical caps, diaphragms etc. To take birth control pills, the dcotor's prescription is needed, as they are hormonal based.

Topic: Biology, Reproductive Health, NEET
Which microbe helps in providing the antibiotics erythromycin and chloramphenicol?

Options:
A Penicillium species
B Aspergillus species
C Streptomyces species
D Bacillus species

The correct answer is:
Streptomyces species

Solution:
Erythromycin obtained from Streptomyceserythreus, and it is a broad-spectrum antibiotic. Chloramphenicol is also a broad-spectrum antibiotic produced by Streptomycesvenezuelae used in treating typhoid fever and rickettsial infections.

Topic: Biology, Microbes in Human Welfare, NEET
Which microbe is commonly used for the production of alcoholic beverages like wine, beer, whisky, brandy, and rum?

Options:
A Lactobacillus
B Propionibacterium
C Saccharomyces cerevisiae
D Viroids

The correct answer is:
Saccharomyces cerevisiae

Solution:
Saccharomyces cerevisiae, commonly called brewer's yeast, is used for fermenting malted cereals and fruit juices to produce ethanol in the production of alcoholic beverages like wine, beer, whisky, brandy, and rum.

Topic: Biology, Microbes in Human Welfare, NEET
Which micronutrient is required for splitting of water molecule during photosynthesis?

Options:
A copper
B manganese
C molybdenum
D magnesium

The correct answer is:
manganese

Solution:
Micronutrients or trace elements, are needed in very small amounts. These include iron, manganese, copper, molybdenum, zinc, boron, chlorine and nickel.

Manganese is absorbed in the form of manganous ions (Mn2+). It activates many enzymes involved in photosynthesis, respiration and nitrogen metabolism. The best-defined function of manganese is in the splitting of water to liberate oxygen during photosynthesis.

Topic: Biology, Mineral Nutrition, NEET, NEET 2023 (All India)
Which minerals are mentioned as important sources of aluminum?

Options:
A Bauxite and cryolite
B Borax and kernite
C Mica and quartz
D Gypsum and limestone

The correct answer is:
Bauxite and cryolite

Solution:
Bauxite and cryolite are important minerals of aluminum.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which mixture is lighter than humid air?

Options:
A N2+O2+SO2
B N2+O2+CO2
C N2+O2+Ne
D N2+O2+He

The correct answer is:
N2+O2+He

Solution:
Humid air is lighter than dry air (N2+O2) as its average molar mass is less. Presence of He in air (N2+O2) gives lower molar mass than humid air.

Topic: Chemistry, Environmental Chemistry, NEET
Which moieties of nucleosides are involved in the formation of phosphodiester linkages present in dinucleotides?

Options:
A When nucleoside is linked to phosphoric acid at 5’ position of the sugar moiety. It forms a nucleotide. Nucleotides are joined together by phosphodiester links between 5 and 3 carbon atoms of the pentose sugar.
B When nucleoside is linked to phosphoric acid at 1 position of the sugar moiety. It forms a nucleotide. Nucleotides are joined together by phosphodiester links between 1 and 3 carbon atoms of the pentose sugar.
C When nucleoside is linked to phosphoric acid at 2’ position of the sugar moiety. It forms a nucleotide. Nucleotides are joined together by phosphodiester links between 5 and 2 carbon atoms of the pentose sugar.
D When nucleoside is linked to phosphoric acid at 5’ position of the sugar moiety. It forms a nucleotide. Nucleotides are joined together by phosphodiester links between 1 and 9 carbon atoms of the pentose sugar.

The correct answer is:
When nucleoside is linked to phosphoric acid at 5’ position of the sugar moiety. It forms a nucleotide. Nucleotides are joined together by phosphodiester links between 5 and 3 carbon atoms of the pentose sugar.

Solution:
Correct Option is : (A)
When nucleoside is linked to phosphoric acid at 5’ position of the sugar moiety. It forms a nucleotide. Nucleotides are joined together by phosphodiester links between 5 and 3 carbon atoms of the pentose sugar.

Topic: Chemistry, Biomolecules, NEET
Which molecule is added to glucose to produce a cyanohydrin?

Options:
A Water
B Oxygen
C Hydrogen cyanide
D Carbon dioxide

The correct answer is:
Hydrogen cyanide

Solution:
Glucose reacts with hydrogen cyanide to give cyanohydrin.

Topic: Chemistry, Biomolecules, NEET
Which molecule is formed when the carboxyl group of glycine combines with the amino group of alanine?

Options:
A Polypeptide
B Dipeptide
C Tripeptide
D Tetrapeptide

The correct answer is:
Dipeptide

Solution:
The combination of the carboxyl group of glycine and the amino group of alanine results in a "dipeptide."

Topic: Chemistry, Biomolecules, NEET