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Which one of the following statements is not correct ?
neet
chemistry
past papers
2017
39
asked
Aug 21, 2018
by
pady_1
1
answer
$HgCl_2$ and $I_2$ both when dissolved in water containing $I^–$ ions pair of species formed is :
neet
chemistry
past papers
2017
38
asked
Aug 21, 2018
by
pady_1
1
answer
Which of the following pairs of compounds is isoelectronic and isostructural ?
neet
chemistry
past papers
2017
37
asked
Aug 21, 2018
by
pady_1
1
answer
For a given reaction, $\Delta H = 35.5\; KJ\; mol^{-1}$ and $\Delta S = 83.6 \; JK^{-1} mol^{-1}$. The reaction is spontaneous at : (Assume that $\Delta H$ and $\Delta S$ do not vary with temperature)
neet
chemistry
past papers
2017
36
asked
Aug 21, 2018
by
pady_1
1
answer
The correct statement regarding electrophile is :
neet
chemistry
past papers
2017
35
asked
Aug 21, 2018
by
pady_1
1
answer
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of $Co^{3+}$ is -
neet
chemistry
past papers
2017
34
asked
Aug 21, 2018
by
pady_1
1
answer
A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy $\Delta U$ of the gas in joules will be -
neet
chemistry
past papers
2017
33
asked
Aug 21, 2018
by
pady_1
1
answer
In the electrochemical cell - <br> $Zn|ZnSO_4 \; (0.01 M) || CuSO_4 \; (1.0 M) | Cu$, the emf of this Daniel cell is $E_1$. When the concentration of $ZnSO_4$ is changed to $0.1 M$ and that of $CuSO_4$ changed to $0.01 M$, the emf changes to $E_2$. From the followings, which one is the relayionship between $E_1$ and $E_2$ ? (Given , $\frac{RT}{F} = 0.059$)
neet
chemistry
past papers
2017
32
asked
Aug 21, 2018
by
pady_1
1
answer
neet
chemistry
past papers
2017
31
asked
Aug 21, 2018
by
pady_1
1
answer
Predict the correct intermediate and product in the following reaction : <br> $H_3C - CH \equiv CH \xrightarrow[\text{$HgSO_4$}]{\text{$H_2O, H_2SO_4$}} \stackrel{\hbox{Intermediate}}{\hbox{(A)}} \to \stackrel{\hbox{Product}}{\hbox{(B)}}$
neet
chemistry
past papers
2017
30
asked
Aug 21, 2018
by
pady_1
2
answers
Machanism of a hypothetical reaction $X_2 + Y_2 \to 2XY$ is given below. <br> (i) $X_2 \to X + X (fast)$<br> (ii) $X + Y_2 \rightleftharpoons XY + Y (slow)$ <br> (iii) $X + Y \to XY (fast) $ <br> The overall order of the reaction will be -
neet
chemistry
past papers
2017
29
asked
Aug 21, 2018
by
pady_1
1
answer
Consider the reactions : <br> Identify A, X, Y and Z
neet
chemistry
past papers
2017
28
asked
Aug 21, 2018
by
pady_1
1
answer
A first order reaction has a specific reaction rate of $10^{–2} sec^{–1}$. How much time will it take for $20 \;g$ of the reactant to reduce to $5g$ ?
neet
chemistry
past papers
2017
27
asked
Aug 21, 2018
by
pady_1
1
answer
Which one is the most acidic compound ?
neet
chemistry
past papers
2017
26
asked
Aug 21, 2018
by
pady_1
1
answer
Which one is the wrong statement ?
neet
chemistry
past papers
2017
25
asked
Aug 21, 2018
by
pady_1
1
answer
An example of a sigma bonded organometallic compound is-
neet
chemistry
past papers
2017
24
asked
Aug 21, 2018
by
pady_1
1
answer
The correct order of the stoichiometries of $AgCl$ formed when $AgNO_3$ in excess is treated with the complexes : $CoCl_3.6NH_3, CoCl_3.5NH_3, CoCl_3.4NH_3$ respectively is -
neet
chemistry
past papers
2017
23
asked
Aug 21, 2018
by
pady_1
1
answer
Which of the following is dependent on temperature ?
neet
chemistry
past papers
2017
22
asked
Aug 21, 2018
by
pady_1
1
answer
Which is the incorrect statement ?
neet
chemistry
past papers
2017
21
asked
Aug 21, 2018
by
pady_1
1
answer
A 20 litre container at 400 K contains $CO_2(g)$ at pressure $0.4\; atm$ and an excess of $SrO$ (neglect the volume of solid $SrO$). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of $CO_2$ attains its maximum value, will be : <br> (Given that : $SrCO_3 (s) \stackrel{K}\rightleftharpoons SrO (s) + CO_2 (g), Kp = 1.6 \; atm$ )
neet
chemistry
past papers
2017
20
asked
Aug 21, 2018
by
pady_1
1
answer
Extraction of gold and silver involves leaching with $CN^–$ ion. Silver is later recovered by :
neet
chemistry
past papers
2017
19
asked
Aug 21, 2018
by
pady_1
1
answer
It is because of inability of $ns^2$ electrons of the valence shell to participate in bonding that :
neet
chemistry
past papers
2017
18
asked
Aug 21, 2018
by
pady_1
1
answer
Mixture of chloroxylenol and terpineol acts as :
neet
chemistry
past papers
2017
17
asked
Aug 21, 2018
by
pady_1
1
answer
Match the interhalogen compounds of column I with the geometry in column II and assign the correct code . <br>
neet
chemistry
past papers
2017
16
asked
Aug 21, 2018
by
pady_1
1
answer
The equilibrium constants of the following are : <br> $N_2 + 3H_2 \rightleftharpoons 2NH_3$ <br> $N_2 + O_2 \rightleftharpoons 2NO$ <br> $H_2 + \frac{1}{2} O_2 \to H_2O$ <br> The equilibrium constant (K) of the reaction : <br> $2NH_3 + \frac{5}{2} O_2 \stackrel{K}\rightleftharpoons 2NO + 3H_2O,$ will be
neet
chemistry
past papers
2017
15
asked
Aug 21, 2018
by
pady_1
1
answer
Pick out the correct statement with respect to $[Mn(CN)_6]^{3-}$
neet
chemistry
past papers
2017
14
asked
Aug 21, 2018
by
pady_1
1
answer
In which pair of ions both the species contain S – S bond?
neet
chemistry
past papers
2017
13
asked
Aug 21, 2018
by
pady_1
1
answer
Which of the following is sink for CO?
neet
chemistry
past papers
2017
12
asked
Aug 21, 2018
by
pady_1
1
answer
Identify A and predict the type of reaction <br>
neet
chemistry
past papers
2017
11
asked
Aug 21, 2018
by
pady_1
1
answer
With respect to the conformers of ethane, which of the following statements is true?
neet
chemistry
past papers
2017
10
asked
Aug 21, 2018
by
pady_1
1
answer
Concentration of the $Ag^+$ ions in a saturated solution of $Ag_2C_2O_4$ is $2.2 \times 10^{-4} \; mol\; L^{-1}$. Solubility product of $Ag_2C_2 O_4$ is :
neet
chemistry
past papers
2017
9
asked
Aug 21, 2018
by
pady_1
1
answer
The reason for greater range of oxidation states in actinoids is attributed to :
neet
chemistry
past papers
2017
8
asked
Aug 21, 2018
by
pady_1
1
answer
Name the gas that can readily decolourise acidified $KMnO_4$ solution :
neet
chemistry
past papers
2017
7
asked
Aug 21, 2018
by
pady_1
1
answer
Which one of the following pairs of species have the same bond order?
neet
chemistry
past papers
2017
6
asked
Aug 21, 2018
by
pady_1
1
answer
The correct increasing order of basic strength for the following compounds is : <br>
neet
chemistry
past papers
2017
5
asked
Aug 21, 2018
by
pady_1
1
answer
The heating of phenyl-methyl ethers with HI produces
neet
chemistry
past papers
2017
4
asked
Aug 21, 2018
by
pady_1
1
answer
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
neet
chemistry
past papers
2017
3
asked
Aug 21, 2018
by
pady_1
1
answer
Which of the following statements is not correct?
neet
chemistry
past papers
2017
2
asked
Aug 21, 2018
by
pady_1
1
answer
The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is :
neet
chemistry
past papers
2017
1
asked
Aug 21, 2018
by
pady_1
1
answer
The angle of incidence for a ray of light at a refracting surface of a prism is $45^o$. The angle of prism is $60^o$. If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are :
neet
physics
past papers
2016
180
asked
Aug 21, 2018
by
pady_1
1
answer
A particle of mass 10 g moves along a circle of radius 6.4 cm with a constant tangential acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to $8 \times 10^{–4} J$ by the end of the second revolution after the beginning of the motion ?
neet
physics
past papers
2016
179
asked
Aug 21, 2018
by
pady_1
1
answer
A refrigerator works between $4^oC$ and $30^oC$. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is : (Take 1 cal = 4.2 Joules)
neet
physics
past papers
2016
178
asked
Aug 21, 2018
by
pady_1
1
answer
When an $\alpha$-particle of mass 'm' moving with velocity 'v' bombards on a heavy nucleus of charge 'Ze', its distance of closest approach from the nucleus depends on m as :
neet
physics
past papers
2016
177
asked
Aug 21, 2018
by
pady_1
1
answer
An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is :
neet
physics
past papers
2016
176
asked
Aug 21, 2018
by
pady_1
1
answer
An inductor $20 \;mH$, a capacitor $50 \; \mu F$ and a resistor $40\; \Omega$ are connected in series across a source of emf $V = 10 \sin 340t$. The power loss in A.C. circuit is :
neet
physics
past papers
2016
175
asked
Aug 21, 2018
by
pady_1
1
answer
A uniform rope of length $L$ and mass $m_1$ hangs vertically from a rigid support. A block of mass $m_2$ is attached to the free end of the rope. A transverse pulse of wavelength $\lambda_1$ is produced at the lower end of the rope. The wavelength of the pulse when it reaches the top of the rope is $\lambda_2$. The ratio $\lambda_2/\lambda_1$ is :
neet
physics
past papers
2016
174
asked
Aug 21, 2018
by
pady_1
1
answer
A small signal voltage $V(t )= V_0 \sin \omega t$ is applied across an ideal capacitor C :
neet
physics
past papers
2016
173
asked
Aug 21, 2018
by
pady_1
1
answer
What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop ?
neet
physics
past papers
2016
172
asked
Aug 21, 2018
by
pady_1
1
answer
A uniform circular disc of radius 50 cm at rest is free to turn about an axis which is perpendicular to its plane and passes through its centre. It is subjected to a torque which produces a constant angular acceleration of $2.0\; rad\; s^{–2}$ . Its net acceleration in $ms^{–2}$ at the end of 2.0 s is approximately :
neet
physics
past papers
2016
171
asked
Aug 21, 2018
by
pady_1
1
answer
A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is : [Latent heat of ice is $3.4 \times 10^5 \;J/kg$ and $g = 10\; N/kg$]
neet
physics
past papers
2016
170
asked
Aug 21, 2018
by
pady_1
1
answer
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