Email
Chat with tutors
Login
Ask Questions, Get Answers
Menu
X
home
ask
tuition
questions
practice
papers
mobile
tutors
pricing
X
Recent questions and answers in 2018
Questions
>>
JEEMAIN and NEET
>>
NEET PAST PAPERS
>>
2018
Identify the major products P, Q and R in the following sequence of reactions : <br>
neet
chemistry
past papers
2018
90
answered
Apr 2, 2020
by
meena.clay6
1
answer
Which of the following compounds can form a zwitterion ?
neet
chemistry
past papers
2018
89
answered
Apr 2, 2020
by
meena.clay6
1
answer
Given var der Waals constant for $NH_3, H_2, O_2$ and $CO_2$are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied ?
neet
chemistry
past papers
2018
88
answered
Apr 2, 2020
by
meena.clay6
1
answer
The solubility of $BaSO_4$ in water is $2.42 \times 10^{-3} gL^{-1}$ at 298 K. The value of its solubility product $(K_{sp})$ will be <br> (Given molar mass of $BaSO_4 = 233 \; g\;mol^{-1}$ )
neet
chemistry
past papers
2018
87
answered
Apr 2, 2020
by
meena.clay6
1
answer
On which of the following properties does the coagulating power of an ion depend ?
neet
chemistry
past papers
2018
86
answered
Apr 2, 2020
by
meena.clay6
1
answer
Following solutions were prepared by mixing different volumes of $NaOH$ and $HCl$ of different concentration : <br> pH of which one of them will be equal to 1 ?
neet
chemistry
past papers
2018
85
answered
Apr 2, 2020
by
meena.clay6
1
answer
The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is
neet
chemistry
past papers
2018
84
answered
Apr 2, 2020
by
meena.clay6
1
answer
Which one of the following ions exhibits d-d transition and paramagnetism as well ?
neet
chemistry
past papers
2018
83
answered
Apr 2, 2020
by
meena.clay6
1
answer
The geometry and magnetic behaviour of the complex $[Ni(CO)_4]$ are
neet
chemistry
past papers
2018
82
answered
Apr 2, 2020
by
meena.clay6
1
answer
Iron carbonyl, $Fe(CO)_5$ is
neet
chemistry
past papers
2018
81
answered
Apr 2, 2020
by
meena.clay6
1
answer
Compound A, $C_8 H_{10}O$, is found to react with $NaOI$ (produced by reacting Y with NaOH) and yield a yellow precipitate with characteristic smell. <br> A and Y are respectively
neet
chemistry
past papers
2018
79
answered
Apr 2, 2020
by
meena.clay6
1
answer
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
neet
chemistry
past papers
2018
78
answered
Apr 2, 2020
by
meena.clay6
1
answer
In the reaction <br> <br> The electrophile involved is
neet
chemistry
past papers
2018
77
answered
Apr 2, 2020
by
meena.clay6
1
answer
Which one of the following elements is unable to form $MF_6^{3-}$ ion ?
neet
chemistry
past papers
2018
76
answered
Mar 31, 2020
by
meena.clay6
1
answer
The correct order of N-compounds in its decreasing order of oxidation states is
neet
chemistry
past papers
2018
75
answered
Mar 31, 2020
by
meena.clay6
2
answers
In the structure of $CIF_3$, the number of Ione pair of electrons on central atom 'Cl' is
neet
chemistry
past papers
2018
74
answered
Mar 31, 2020
by
meena.clay6
1
answer
The correct order of atomic radii in group 13 elements is
neet
chemistry
past papers
2018
73
answered
Mar 31, 2020
by
meena.clay6
1
answer
Considering Ellingham diagram, which of the following metals can be used to reduce alumina ?
neet
chemistry
past papers
2018
72
answered
Mar 31, 2020
by
meena.clay6
2
answers
Which of the following statements is not true for halogen ?
neet
chemistry
past papers
2018
71
answered
Mar 31, 2020
by
meena.clay6
1
answer
Consider the following species : <br> $CN^+, CN^-, NO$ and $CN$ <br> Which one of these will have the highest bond order ?
neet
chemistry
past papers
2018
70
answered
Mar 31, 2020
by
meena.clay6
1
answer
Which one is a wrong statement ?
neet
chemistry
past papers
2018
69
answered
Mar 31, 2020
by
meena.clay6
1
answer
Iron exhibits bcc structure at room temperature. About $900^oC$, it transforms to fcc structure. The ratio of density of iron at room temperature to that at $900^oC$ (assuming molar mass and atomic radii of iron remains constant with temperature) is
neet
chemistry
past papers
2018
68
answered
Mar 31, 2020
by
meena.clay6
1
answer
Magnesium reacts with an element (X) to form an ionic compoun. If the ground state electronic configuration of (X) is $1s^2 2s^2 2p^3$, the simplest formula for this compound is
neet
chemistry
past papers
2018
67
answered
Mar 31, 2020
by
meena.clay6
1
answer
Which of the followng carbocations is expected to be most stable ?
neet
chemistry
past papers
2018
66
answered
Mar 30, 2020
by
meena.clay6
1
answer
Which of the following molecules represents the order of hybridisation $sp^2, sp^2, sp, sp$ from left to right atoms?
neet
chemistry
past papers
2018
65
answered
Mar 30, 2020
by
meena.clay6
1
answer
The correct difference between first and second order reactions is that
neet
chemistry
past papers
2018
63
answered
Mar 30, 2020
by
meena.clay6
1
answer
In which case in number of molecules of water maximum ?
neet
chemistry
past papers
2018
62
answered
Mar 30, 2020
by
meena.clay6
1
answer
Among $CaH_2, BeH_2, BaH_2$, the order of ionic character is
neet
chemistry
past papers
2018
61
answered
Mar 30, 2020
by
meena.clay6
1
answer
Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below : <br> $BrO_4^- \xrightarrow{1.82 V} BrO_3^- \xrightarrow{1.5 V} HBrO \xrightarrow{1.595 V} Br_2 \xrightarrow{1.0652 V} Br^-$ <br> Then the species undergoing disproportionation is
neet
chemistry
past papers
2018
60
answered
Mar 30, 2020
by
meena.clay6
1
answer
Which one of the following conditions will favour maximum formation of the product in the reaction, <br> $A_2 (g) + B_2 (g) \rightleftharpoons X_2 (g) \Delta_f H = - X\;kJ$ ?
neet
chemistry
past papers
2018
59
answered
Mar 30, 2020
by
meena.clay6
2
answers
For the redox reaction <br> $MnO_4^- + C_2O_4^{2-} + H^+ \to Mn^{2+} + CO_2 + H_2O$ <br> The correct coefficients of the reactants for the balanced equation are <br>
neet
chemistry
past papers
2018
58
answered
Mar 30, 2020
by
meena.clay6
1
answer
The correction factor 'a' to the ideal gas equation corresponds to
neet
chemistry
past papers
2018
57
answered
Mar 30, 2020
by
meena.clay6
2
answers
When initial concentration of the reactant is doubled, the half-life period of a zero order reaction
neet
chemistry
past papers
2018
56
answered
Mar 30, 2020
by
meena.clay6
2
answers
The bond dissociation energies of $X_2, Y_2$ and $XY$ are in the ratio of 1 : 0.5 : 1. $\Delta H$ for the formation of $XY$ is $-200\; kJ \;mol^{-1}$. The bond dissociation energy of $X_2$ will be :
neet
chemistry
past papers
2018
55
answered
Mar 30, 2020
by
meena.clay6
1
answer
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
neet
chemistry
past papers
2018
54
answered
Mar 30, 2020
by
meena.clay6
1
answer
The compound $C_7H_8$ undergoes the following reactions: <br> $C_7H_8 \xrightarrow{3Cl_2/ \Delta} A \xrightarrow{Br_2/Fe} B \xrightarrow{Zn/ HCl} C$ <br> The product 'C' is
neet
chemistry
past papers
2018
53
answered
Mar 30, 2020
by
meena.clay6
1
answer
Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is
neet
chemistry
past papers
2018
52
answered
Mar 30, 2020
by
meena.clay6
1
answer
The compound A on treatment with Na gives B, and with $PCl_4$ gives C, B and C react together to give diethyl ether. A, B and C are in the order
neet
chemistry
past papers
2018
51
answered
Mar 30, 2020
by
meena.clay6
1
answer
Nitrogen of aniline in strong acidic medium also gives m-nitroaniline because
neet
chemistry
past papers
2018
50
answered
Mar 30, 2020
by
meena.clay6
1
answer
Regarding cross-linked or network polymers, which of the following statements is incorrect ?
neet
chemistry
past papers
2018
49
answered
Mar 30, 2020
by
meena.clay6
1
answer
A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. $H_2SO_4$. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP wil be
neet
chemistry
past papers
2018
48
answered
Mar 30, 2020
by
meena.clay6
1
answer
The diffrence between amylose and amylopectin is
neet
chemistry
past papers
2018
47
answered
Mar 30, 2020
by
meena.clay6
1
answer
Which of the following oxides is most acidic in nature ?
neet
chemistry
past papers
2018
46
answered
Mar 30, 2020
by
meena.clay6
1
answer
Match the metal ions given in Column I and the spin magnetic moments of the ions given in Column II and assign the correct code : <br>
neet
chemistry
past papers
2018
80
answered
Mar 17, 2020
by
sharmaaparna1
1
answer
When the light of frequency $2v_o$ (where $v_0$ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is $v_1$. When the frequency of the incident radiation is increased to $5v_0$, the maximum velocity of eletrons emitted from the same plate is $v_2$. The ratio of $v_1$ to $v_2$ is
neet
physics
past papers
2018
45
answered
Feb 27, 2020
by
priyanka.clay6
1
answer
The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is
neet
physics
past papers
2018
44
answered
Feb 27, 2020
by
priyanka.clay6
1
answer
For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is
neet
physics
past papers
2018
43
answered
Feb 27, 2020
by
priyanka.clay6
1
answer
An electron of mass m with an initial velocity $\overrightarrow{V} = V_0 \hat{i} (V_0 > 0) $ enters an electric field $\overrightarrow{E} = -E_0 \hat{i} (E_0 = constant > 0)$ at $t = 0$. If $\lambda_0$ is its de-Broglie wavelength initially, then its de-Broglie wavelength at time t is :
neet
physics
past papers
2018
42
answered
Feb 27, 2020
by
priyanka.clay6
1
answer
A small sphere of radius 'r' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to
neet
physics
past papers
2018
41
answered
Feb 27, 2020
by
priyanka.clay6
1
answer
The power radiated by a black body is P and it radiates maximum energy at wavelength, $\lambda_0$. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength $\frac{3}{4} \lambda_D$, the power radiated by it becomes nP. The value of n is
neet
physics
past papers
2018
40
answered
Feb 27, 2020
by
priyanka.clay6
1
answer
To see more, click for all the
questions in this category
.
Home
Ask
Tuition
Questions
Practice
Your payment for
is successful.
Continue
...
