datavorous/entrance-exam-dataset huggingface dataset:
By producing complementary strand for the transcribed mRNA results in making ds-mRNA which cannot be translated. Thus leading to silencing of the mRNA. This technique has proved to be beneficial for controlling nematode infection and increasing the yield in

Options:
A Tomato plant
B Cotton plant
C Tobacco plant
D Soyabean plant

The correct answer is:
Tobacco plant

Solution:
Nematode like Meloidegyne incognitia infect the root of tobacco plant and reduce the yield. The process of RNAi involves silencing of a specific mRNA due to a complementary dsRNA molecule that binds to and prevents translation of the mRNA (silencing). The consequence was that the host became inhospitable for the parasite to survive and thus the plant is protected.

Topic: Biology, Biotechnology and Its Applications, NEET
By starting with 0.5 moles of sodium peroxide how many moles of dioxygen gas can be obtained by dropping excess of acidified potassium permanganate solution on it?

Options:
A 0.125 mole
B 1 mole
C 0.25 mole
D 0.5 mole

The correct answer is:
0.5 mole

Solution:
2KMnO4+5Na2O2+8H2SO4→K2SO4+2MnSO4+5Na2SO4+8H2O+5O2
5 mole  Na 2 O 2 O 2  = 5 gives O 2  = 5 mole
So 0.5 mol  Na 2 O 2 give O 2  = 0.5 mol

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
By the action of alcoholic caustic potash on chloroform and aniline, a bad-smelling substance is formed. The substance is

Options:
A Nitrobenzene
B Phenyl isocyanide
C Phenyl cyanide
D Phenyl isocyanate

The correct answer is:
Phenyl isocyanide

Solution:
Action of alcoholic caustic potash on chloroform and aniline forms a bad-smelling compound phenyl isocyanide.
C6H5NH2+CHCl3+3KOHalcohol→C6H5NC+3KCl+3H2O
This reaction is called carbylamine reaction and it is actually the test of primary amines.

Topic: Chemistry, Amines, NEET
By the action of concentrated sodium hydroxide on benzaldehyde, the benzyl alcohol and sodium benzoate is obtained . This reaction is known as

Options:
A Perkin’s reaction
B Cannizzaro’s reaction
C Sandmeyer’s reaction
D Claisen condensation

The correct answer is:
Cannizzaro’s reaction

Solution:
Benzaldehyde on treatment with 50% aqueous or ethanolic alkali solution undergoes Cannizzaro’s reaction like HCHO (no α- hydrogen atom) i.e., one molecule is oxidised and one is reduced with the formation of benzoic acid and benzyl alcohol respectively.

Topic: Chemistry, Aldehydes and Ketones, NEET
By the ozonolysis, of RCH=CR1R2 , which of the following product is obtained?

Options:
A R1CH2CH2R2
B R2CO
C R1COR2
D None of these

The correct answer is:
R1COR2

Solution:
The reaction of ozonolysis of RCH=CR1R2 is
RCH=CR1R2+O3â Zn H2O RCHO+R1COR2

Topic: Chemistry, Hydrocarbons, NEET
By the process of leaching, _________ nutrients go down into the soil horizon and get precipitated.

Options:
A water soluble, inorganic
B water insoluble, inorganic
C water soluble, organic
D water insoluble, organic

The correct answer is:
water soluble, inorganic

Solution:
Leaching is a process involved in decomposition. In this inorganic nutrients which are soluble in the water go down into the soil horizon and get precipitated as unavailable salts.

Topic: Biology, Ecosystem, NEET
By using following mechanism determine the order of the reaction
(i) A2→A+A (fast)
iiA+B2→AB+B (slow)
(iii) A+B→ (fast)

Options:
A 112
B 312
C 2
D None of these

The correct answer is:
112

Solution:
Slowest step is rate determining step, hence the rate will be given by slowest step.
Thus r=K[A][B2] . Where [A] is intermediate, which is derived from
Kc=[A][A][A2] or [A]=[Kc]1/2[A2]1/2
r=K×[Kc]1/2[A2]1/2[B2]=K[A2]1/2[B] .
Thus, order is 0.5+1=1.5

Topic: Chemistry, Chemical Kinetics, NEET
By using only two resistance coils singly, in series or in parallel one should be able to obtain resistances of 3, 4, 12 and 16 Î©. The separate resistances of the coil are

Options:
A 3 and 4
B 4 and 12
C 12 and 16
D 16 and 3

The correct answer is:
4 and 12

Solution:
If we take R⁡1=4 Ω, R2=12 Ω then in series resistance
R = R 1 + R 2
= 4 + 1 2
=16 Ω
In parallel, resistanceR⁡=4×124+12=3 Ω
SoR⁡1=4 Ω, R2⁡=12 Ω

Topic: Physics, Current Electricity, NEET
By what factor does the average velocity of a gaseous molecule increase when the absolute temperature is doubled?

Options:
A 1.4
B 2.0
C 2.8
D 4.2

The correct answer is:
1.4

Solution:
Average velocity of a gaseous molecule =8RTπM
If the absolute temperature is doubled, then new
Average velocity becomes =8R.2TπM
New average velocity =2.8RTπM
New average velocity =1.4× original average velocity.

Topic: Chemistry, States of Matter, NEET
By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?

Options:
A 2.8
B 4.0
C 1.4
D 2.0

The correct answer is:
1.4

Solution:
Average velocity $=\sqrt{\frac{8 R T}{\pi M}}$
$$
\begin{aligned}
& \therefore V_{a v} \propto \sqrt{T} \\
& \text { or } \frac{\left(V_{a v}\right)_2}{\left(V_{a v}\right)_1}=\sqrt{\frac{2 T}{T}}=1.4
\end{aligned}
$$

Topic: Chemistry, States of Matter, NEET, NEET 2011 (Screening)
By what factor does the de-Broglie wavelength of a free electron changes if its kinetic energy is doubled?

Options:
A 12
B 2
C 12
D 2

The correct answer is:
12

Solution:
We know
λ=hmv
and K=12mv2=mv22m
mv= 2mK
Thus, λ =h2mK
⇒ λ∝1K
∴ λ2λ1=K1K2=K12K1 ∵K2=2K1
⇒ λ2λ1=12
∴ λ2=λ12

Topic: Physics, Dual Nature of Matter, NEET
By what percentage should the pressure of a given mass of a gas be increased so as to decreases its volume by 10% at a constant temperature?

Options:
A 8.1 %
B 9.1 %
C 10.1 %
D 11.1%

The correct answer is:
11.1%

Solution:
According to Boyle's Law :
P1V1=P2V2
PV=P′×90V100,P′P=109
P′-PP×100=109-1×100=1009=11.1

Topic: Physics, Kinetic Theory of Gases, NEET
By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?

Options:
A Mutational breeding
B Cross breeding
C Inbreeding
D Out crossing

The correct answer is:
Cross breeding

Solution:
Crossbreeding: The mating of animals belonging to different breeds is called cross-breeding. It involves interbreeding of superior males of a breed with superior females of another breed to produce hybrid animals.

E.g. Bikaneri ewes were cross-breed with Marino rams to produce hybrid Hisardale.

Topic: Biology, Strategies for Enhancement in Food Production, NEET, NEET 2020 (Phase 1)
By which of the following method, H2O2 cannot be synthesised?

Options:
A Addition of H2SO4 on BaO2
B Addition of H2SO4 on PbO2
C Aerial oxidation of 2- ethyl anthraquinol
D Electrolysis of (NH4)2SO4 at a high current density.

The correct answer is:
Addition of H2SO4 on PbO2

Solution:
When PbO2 react with H2O2 , convert Pb+4 into more stable Pb+2 , liberating oxygen.

Topic: Chemistry, s Block Elements, NEET
By which process Pb and Sn are extracted respectively?

Options:
A Carbon reduction – self reduction
B Self reduction – carbon reduction
C Electrolytic reduction – cyanide process
D Cyanide process – electrolytic reduction

The correct answer is:
Self reduction – carbon reduction

Solution:
PbS+2PbOâ3Pb+SO2(self reduction)
SnO+CâSn+CO(Carbon reduction)

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
C2 cycle is studied in

Options:
A C4 plants
B Those plants that show photorespiration
C Both C4 plants and those plants that show photorespiration
D None of the above

The correct answer is:
Those plants that show photorespiration

Solution:
The RuBP instead of being converted to 2 molecules of PGA binds with O2 to form one molecule of phosphoglycerate and phosphoglycolate (2 Carbon) in a pathway called photorespiration. In the photorespiratory pathway, there is neither synthesis of sugars, nor of ATP. Rather it results in the release of CO2 with the utilization of ATP. In the photorespiratory pathway there is no synthesis of ATP or NADPH.

Topic: Biology, Photosynthesis in Higher Plants, NEET
C2H5OH is commercially produced through a particular species of

Options:
A Saccharomyces
B Clostridium
C Trichoderma
D Aspergillus

The correct answer is:
Saccharomyces

Solution:
Ethanol (C2H5OH) is a type of alcohol that is a product of the fermentation process. Ethanol is widely consumed as a mix in varying degree of concentration. Fermentation is an anaerobic respiratory process where many strains of Saccharomyces are used.
Aspergillus is utilized in commercial manufacturing of citric acid and gluconic acid.
The bioactive molecule, cyclosporin A, that is used as an
immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum.
Clostridium is a microbial source for commercial production of butyric acid.

Topic: Biology, Microbes in Human Welfare, NEET
C3 -epimer of D-Glucose is

Options:
A D-Glucose
B D-Allose
C D-Altrose
D D-Mannose

The correct answer is:
D-Allose

Solution:
C3 -epimer of D-Glucose is D-Allose.

Topic: Chemistry, Biomolecules, NEET
$\mathrm{C}_4$-plants are more efficient in photosynthesis than $\mathrm{C}_3$-plants due to

Options:
A higher leaf area
B presence of larger number of chloroplasts in the leaf cells
C presence of thin cuticle
D lower rate of photorespiration

The correct answer is:
lower rate of photorespiration

Solution:
The $C_4$ pathway is certainly more efficient than the $C_3$ pathway in the sense of carbon fixation. In $C_3$ plants, carbon dioxide and oxygen are both present. This means that most of the ribulose-1,5-bisphosphate is carboxylated, but some of the ribulose-1,5-bisphosphate is oxygenated. This results in photorespiration. So the correct option is Lower rate of photorespiration.

Topic: Biology, Photosynthesis in Higher Plants, NEET, NEET 2010 (Screening)
C4 plants are most efficient plants of tropical climate and

Options:
A shows photorespiration
B have large number of chloroplasts and thick walls of bundle sheath cells
C form 4-C organic acids in bundle sheath cell
D perform primary CO2 fixation in bundle sheath cells

The correct answer is:
have large number of chloroplasts and thick walls of bundle sheath cells

Solution:
C4 plants show kranz anatomy. CO2 fixation in C4 plants occur twice, first in mesophylls chroloplast with help of enzymes PEP carboxylase and second in bundle sheet chloroplast with help of enzymes RUBISCO. Because RUBISCO function in C4 plants as carboxylase photorespiration is avoided.

Topic: Biology, Photosynthesis in Higher Plants, NEET
C5H10O is a carbonyl compound. The number of structural isomers possible for this molecular formula are

Options:
A 5
B 8
C 6
D 7

The correct answer is:
7

Solution:

Topic: Chemistry, General Organic Chemistry, NEET
C6H5CHO(l) + 2[Ag(NH3)2]+(aq) + 3OH–(aq) → C6H5COO–(aq) + 2Ag(s) + 4NH3(aq) + 2 H2O(l) What is the inference about the behavior of Ag+ions from this reaction?

Options:
A Ag+ions are easily reduced to Ag(s)
B Ag+ions are oxidizing agents
C Ag+ions are inert in aqueous solutions
D Ag+ions form complex ions with C6H5CHO

The correct answer is:
Ag+ions are inert in aqueous solutions

Solution:
Correct Option is : (C)
Ag+ions are inert in aqueous solutions

Topic: Chemistry, Redox Reactions, NEET
C6H5CHO(l) + 2Cu2+(aq) + 5OH–(aq) → No change observed. What is the inference about the behavior of Cu2+ions from this reaction?

Options:
A Cu2+ions are easily reduced to Cu(s)
B Cu2+ions are oxidizing agents
C Cu2+ions are inert in aqueous solutions
D Cu2+ions form complex ions with C6H5CHO

The correct answer is:
Cu2+ions form complex ions with C6H5CHO

Solution:
Correct Option is : (D)
Cu2+ions form complex ions with C6H5CHO

Topic: Chemistry, Redox Reactions, NEET
C6H5-O-CH2CH3+HI→∆X+Y

Identify X and Y in the above reaction?

Options:
A X: C6H5OH; Y: CH3CH3
B X: C2H5I; Y: C6H5CHO
C X: C6H5I; Y: CH3CH2OH
D X: C6H5OH; Y: CH3CH2I

The correct answer is:
X: C6H5OH; Y: CH3CH2I

Solution:
When an alkyl aryl ether is reacted with halogen acid (HX), the products are always phenol and an alkyl halide. Such ethers are cleaved at the alkyl-oxygen bond due to the more stable aryl-oxygen bond.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
C6H5OH+CHCl3+NaOH→ Salicylaldehyde the electrophile involved in the above reaction is.

Options:
A Dichloromethyl cation CHCl2
B Dichlorocarbene :CCl2
C Trichloromethyl anion C¯Cl3
D Formyl cation CHO

The correct answer is:
Dichlorocarbene :CCl2

Solution:
H2O+CCl3- â:CCl2+Cl- Electrophile (dichloro carbene)

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
CaC2+N2 âA, product A is

Options:
A CaCN2
B CaCN2 and C
C CaCN2+N2
D None of these

The correct answer is:
CaCN2 and C

Solution:
When calcium carbide reacts with nitrogen at 1000â, calcium cyanamtextde and carbon is formed.
CaC 2 + N 2 â 1000â CaCN 2 calcium cyanamide +C

Topic: Chemistry, s Block Elements, NEET
$C$ and Si both have same lattice structure, having 4 bonding electrons in each. However, $C$ is insulator whereas $\mathrm{Si}$ is intrinsic semiconductor. This is because

Options:
A in case of $\mathrm{C}$, the valence band is not completely filled at absolute zero temperature
B in case of $C$, the conduction band is partly filled even at absolute zero temperature
C the four bonding electrons in the case of $C$ lie in the second orbit, whereas in the case of Si they lie in the third
D the four bonding electrons in the case of $\mathrm{C}$ lie in the third orbit, whereas for $\mathrm{Si}$ they lie in the fourth orbit

The correct answer is:
the four bonding electrons in the case of $C$ lie in the second orbit, whereas in the case of Si they lie in the third

Solution:
The four bonding electrons in the case of $C$ lie in the second orbit, whereas in case of Si they lies in the third orbit so loosely bounded valency electron in $\mathrm{Si}$ as compared to $\mathrm{C}$.

Topic: Physics, Semiconductors, NEET, NEET 2012 (Screening)
CCl3CH=CH2→Cl2+H2OA , is

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Hydrocarbons, NEET
C-Cl bond is stronger than C –I bond, because

Options:
A C-Cl bond is more ionic than C –I
B C-Cl bond is polar covalent bond
C C-Cl bond is more covalent than C –I
D C-Cl bond length is longer than C –I

The correct answer is:
C-Cl bond is more ionic than C –I

Solution:
C - Cl bond is more ionic than C - I bond because of the greater difference in electronegativities of C and Cl as compared to that of carbon and iodine. Therefore, C - Cl bond is stronger than C - I bond.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
CH2=C=O+CH3COOH→‘X’

Options:
A o-methyl acetophenone
B
C
D

The correct answer is:

Solution:
Ketene with acetic acid form anhydride,
Hence X is

and the formation of Y occurs through Friedel crafts acylation reaction.

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
(CH3)2C=CHCOCH3 can be oxidized to (CH3)2C=CHCOOH by-

Options:
A Chromic acid
B NaOH
C Cu at 300°C
D KMnO4

The correct answer is:
NaOH

Solution:
It is an iodoform reaction (oxidation) given by compounds containing methyl ketonic linkage with NaOH

Topic: Chemistry, Aldehydes and Ketones, NEET
CH3-CH2-CH2-C≡Ν,(X)CH3-CH|CN-CH3(Y)
Relation between (X) and (Y) is

Options:
A Chain isomer
B Positional isomer
C Functional isomer
D Metamers

The correct answer is:
Chain isomer

Solution:
X and Y are chain isomers
C4H3-C3H2-C2H2-C1≡Ν;C3H3-C2H-CH3|1C≡Ν
In chain isomerism the length of C-chain is changed.

Topic: Chemistry, General Organic Chemistry, NEET
CH3CH2ClâNaCNXâNi/H2Yâacetic anhydrideZ

Z in the above reaction sequence is

Options:
A CH3CH2CH2NHCOCH3
B CH3CH2CH2NH2
C CH3CH2CH2CONHCH3
D CH3CH2CH2CONHCOCH3

The correct answer is:
CH3CH2CH2NHCOCH3

Solution:
CH 3 CH 2 Cl → NaCN CH 3 CH 2 CN X → Ni/ H 2 CH 3 CH 2 CH 2 NH 2 Y → acetic anhydride CH 3 CH 2 CH 2 NHCOCH 3 Z

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
CH3-CH=CH2 and are:

Options:
A Optical isomers
B Ring Chain isomers
C Functional Group Isomers
D None

The correct answer is:
Ring Chain isomers

Solution:
Ring chain isomerism is the phenomenon shown by the compounds having the same molecular formula but possessing open chain and closed ring structures. They are ring chain isomers.

Topic: Chemistry, General Organic Chemistry, NEET
CH3-CH=CHCHO is oxidised to CH3CH=CHCOOH by using–

Options:
A Alkaline KMnO4
B Selenium dioxide
C Osmium tetraoxide
D Ammonical AgNO3

The correct answer is:
Ammonical AgNO3

Solution:
The unsaturated aldehyde oxidises to unsaturated carboxylic acid by ammonical AgNO3 solution known as Tollens reagent.

Topic: Chemistry, Ionic Equilibrium, NEET
CH3COCH3 and CH3CH2CHO can be distinguished by

Options:
A Neutral FeCl3
B Tollen's reagent
C NaHSO3
D 2,Â 4-DNP

The correct answer is:
Tollen's reagent

Solution:
By neutral FeCl 3 only allylic and phenol can be distinguished.
By NaHSO 3 and 2,4-DNP: ketone and aldehyde both can give test.
Ketone and aldehyde can be distinguished by Tollen's reagent, Fehling's solution and Schiff's reagent.
CH3COCH3 (ketone) and CH3CH2CHO (aldehyde) can be distinguished by Tollen's reagent.CH3CH2CHO reacts with Tollen's reagent to give silver mirror while CH3COCH3 does not react.
CH 3 CH 2 CHO + Ag 2 O â Î CH 3 CH 2 COOH + 2 Ag Silver mirror
CH 3 COCH 3 + Ag 2 O â Î No reaction

Topic: Chemistry, Aldehydes and Ketones, NEET
CH3CONH2 & HCONHCH3 are called

Options:
A Position isomers
B Chain isomers
C Tautomers
D Functional isomers

The correct answer is:
Functional isomers

Solution:
Both are amides, but 1° and 2° amide. Thus, they are functional isomers.

Topic: Chemistry, General Organic Chemistry, NEET
CH3MgBr+CO2âDry ether Y âH3Oâ¨ Z

Identify Z from the following.

Options:
A Ethyl acetate
B Acetic acid
C Propanoic acid
D Methyl acetate

The correct answer is:
Acetic acid

Solution:
When Grignard's reagent is treated with CO2 , a magnesium complex is formed, which on further hydrolysis yields monocarboxylic acid.

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
CH3OCH2CH2CH2OCH2CH3 is

Options:
A Ethylmethylpropyl diether
B Ethylmethoxypropyl ether
C 3-Ethoxy-1-methoxypropane
D 1-Ethoxy-3-methoxypropane

The correct answer is:
1-Ethoxy-3-methoxypropane

Solution:
In the compound
alphabetically ethoxy is given priority over methoxy.

Topic: Chemistry, General Organic Chemistry, NEET
CH≡CH→Ni(CN)2X. . Identify X in the given reaction

Options:
A Ethane
B Benzene
C Cycloctatetraene
D Cyclohexane

The correct answer is:
Cycloctatetraene

Solution:

Topic: Chemistry, Hydrocarbons, NEET
CO2 dissociates from carbaminohaemoglobin in the alveoli when

Options:
A pCO2 is high and pO2 is low
B pO2 is high and pCO2 is low
C pCO2 and pO2 are equal
D pCO2 is high and pO2 is low with lesser H+ concentration

The correct answer is:
pO2 is high and pCO2 is low

Solution:
When the exchange of oxygen takes place between the blood and the alveolar air, the partial pressure of the oxygen increases, and that time the carbaminohemoglobin dissociates to form carbon-dioxide and Hb–NH2 . This reduction of the carbon-dioxide content of the haemoglobin due to an increase in the partial pressure of oxygen is also known as the Haldane effect.

Topic: Biology, Breathing and Exchange of Gases, NEET
C-O-C angle in ether molecule is approximately,

Options:
A 111 o
B 90 o
C 180 o
D 109 o 8 ′

The correct answer is:
111 o

Solution:
In ether, sp3 -hybridized oxygen molecule shows a little larger angle 109 o 28' due to steric effect of alkyl groups on two sides of it, which predominates over lone pair effect.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
→Conc.H2SO4B→O3/H2O/ZnC. A, B and C are-

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Aldehydes and Ketones, NEET
CoNH35SO4Br and CoNH35Br SO4 are

Options:
A Linkage isomers
B Coordination isomers
C Ionisation isomers
D Optical isomers

The correct answer is:
Ionisation isomers

Solution:
CoNH35SO4Br and CoNH35Br SO4 , are ionisation isomers. These compounds give different ions in the solution although they have same composition. It arises when the counter ion in a complex salt is itself a potential ligand and can displace a ligand which can then become the counter ion.

Topic: Chemistry, Coordination Compounds, NEET
C peptide of human insulin is:

Options:
A A part of mature insulin molecule
B Responsible for formation of disulfide bridges
C Removed during maturation of pro-insulin to insulin
D Responsible for its biological activity

The correct answer is:
Removed during maturation of pro-insulin to insulin

Solution:
It connects insulin's A-chain to its B-chain in the proinsulin molecule. After proinsulin is packaged into vesicles in the Golgi apparatus (beta-granules), the C-peptide is removed, leaving the A-chain and B-chain bound together by disulfide bonds, that constitute the insulin molecule.

Topic: Biology, Biotechnology and Its Applications, NEET
CrO42- (yellow) changes to Cr2O72- (orange) in pH = x and vice-versa in pH = y. Hence, x and y are

Options:
A 6, 8
B 6, 5
C 8, 6
D 7, 7

The correct answer is:
6, 8

Solution:
CrO42- (yellow) changes to Cr2O72- (orange) in acidic medium so pH = x = 6.
2CrO42-+2H+→Cr2O72-+H2O
The opposite reaction takes place in basic medium so pH = y = 8.
Cr2O72-+2OH-→2CrO42-+H2O

Topic: Chemistry, d and f Block Elements, NEET
cryIIAb and cryIAb produce a toxin that controls

Options:
A cotton bollworms and corn borer respectively
B corn borer and cotton bollworm respectively
C cotton borers and corn bollworms respectively
D corn borer and tobacco budworms respectively

The correct answer is:
cotton bollworms and corn borer respectively

Solution:
Specific Bt-toxin genes were isolated from Bacillus thuringiensis and incorporated into several plants such as tobacco. The toxin is coded by a gene named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms and that by cryIAb control corn borer.

Topic: Biology, Biotechnology and Its Applications, NEET
CS2 and SO3 react to produce

Options:
A COS,SO2
B CO,SO2
C CO2,SO2
D CO2,S

The correct answer is:
COS,SO2

Solution:
CS2 and SO3 react to produce COS,SO2
CS2+3SO3→COS+4SO2Carbonylsulphide

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Cu2+ ions reacts with Fe2+ ion according to the following reaction
Cu2++2Fe2+⇌Cu+2Fe3+
At equilibrium the concentration of Cu2+ ions is not changed by the addition of

Options:
A Cu2+
B Fe2+
C Cu
D Fe3+

The correct answer is:
Cu

Solution:
Cu2++2Fe2+⇌Cu+2Fe3+
For this reaction at equilibrium the concentration of Cu2+ ions is not changed by the addition of Cu as it is solid. So its molar concentration is always taken as unity.

Topic: Chemistry, Chemical Equilibrium, NEET
CuSO4 reacts with excess KCN to form

Options:
A Cu(CN)2
B Cu(NCN)2
C K2[Cu(CN)4]
D K3[Cu(CN)4]

The correct answer is:
K3[Cu(CN)4]

Solution:
CuSO4+2KCN→Cu(CN)2+K2SO4
2Cu(CN)2→Cu2(CN)2+(CN)2
Cu2(CN)2+KCN(excess)→K3[Cu(CN)4]

Topic: Chemistry, d and f Block Elements, NEET
Cv and Cp denote the molar specific heat capacities of a gas at constant volume and constant pressure, respectively. Then

Options:
A Cp-Cv is larger for a diatomic ideal gas than for a monoatomic ideal gas
B Cp+Cv is larger for a diatomic ideal gas than for a monoatomic ideal gas
C CpCv is larger for a diatomic ideal gas than for a monoatomic ideal gas
D Cp.Cv is smaller for a diatomic ideal gas than for a monoatomic ideal gas

The correct answer is:
Cp+Cv is larger for a diatomic ideal gas than for a monoatomic ideal gas

Solution:
For monoatomic gas,
CP=52R
And CV=32R
For diatomic gas,
CP=72R
and CV=52R

Topic: Physics, Thermodynamics, NEET
(c) What happens when Aluminium is treated with dilute NaOH?

Options:
A Aluminium reacts to form hydrogen gas and sodium aluminate.
B Aluminium reacts to form sodium aluminate and hydrogen gas.
C Aluminium reacts to form hydrogen gas and aluminium oxide.
D Aluminium reacts to form aluminium hydroxide and hydrogen gas.

The correct answer is:
Aluminium reacts to form hydrogen gas and sodium aluminate.

Solution:
Correct Option is : (A)
Aluminium reacts to form hydrogen gas and sodium aluminate.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET