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Recent questions tagged 2011
Questions
In Duman's method of estimation of nitrogen 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compond would be : <br> (Aqueous tension at 300 K = 15 mm)
neet
chemistry
past papers
2011
90
asked
Aug 16, 2018
by
pady_1
1
answer
In a set of reactions m - bromobenzoic acid gave a product D. Identify the product D. <br>
neet
chemistry
past papers
2011
89
asked
Aug 16, 2018
by
pady_1
0
answers
What is the product obtained in the following reaction ?
neet
chemistry
past papers
2011
88
asked
Aug 16, 2018
by
pady_1
1
answer
Of the following which one is classified as polyester polymer ?
neet
chemistry
past papers
2011
87
asked
Aug 16, 2018
by
pady_1
1
answer
The value of $\Delta H$ for the reaction $X_{2(g)} + 4Y_{2(g)} \rightleftharpoons 2XY_{4(g)}$ is less than zero. <br> Formation of $XY_{4(g)}$ will be favoured at :
neet
chemistry
past papers
2011
86
asked
Aug 16, 2018
by
pady_1
1
answer
Which of the following has the minimum bond length ?
neet
chemistry
past papers
2011
85
asked
Aug 16, 2018
by
pady_1
1
answer
Of the following complex ions, which is diamagnetic in nature ?
neet
chemistry
past papers
2011
84
asked
Aug 16, 2018
by
pady_1
1
answer
The d-electron configurations of $Cr^{2+}, Mn^{2+}, Fe^{2+}$ and $Co^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit minimum paramagnetic behaviour ? <br> (At. Nos. Cr= 24, Mn= 25, Fe= 26, Co = 27)
neet
chemistry
past papers
2011
83
asked
Aug 16, 2018
by
pady_1
1
answer
The complexes $[Co(NH_3)_6]$ $[Cr(CN)_6]$ and $[Cr(NH_3)_6]$ $[Co(CN)_6]$ are the examples of which type of isomerism ?
neet
chemistry
past papers
2011
82
asked
Aug 16, 2018
by
pady_1
1
answer
Name the type of the structure of silicate in which one oxygen atom of $[SiO_4]^{4–}$ is shared ?
neet
chemistry
past papers
2011
81
asked
Aug 16, 2018
by
pady_1
1
answer
The complex $[Pt\; (Py)\; (NH_3)\; Br\; Cl]$ will have how many geometrical isomers ?
neet
chemistry
past papers
2011
80
asked
Aug 16, 2018
by
pady_1
1
answer
Which one of the following is present as an active ingredient in bleaching powder for bleaching action ?
neet
chemistry
past papers
2011
79
asked
Aug 16, 2018
by
pady_1
1
answer
Which of the following is least likely to behave as Lewis base ?
neet
chemistry
past papers
2011
78
asked
Aug 16, 2018
by
pady_1
1
answer
Which of the following elements is present as the impurity to the maximum extent in the pig iron ?
neet
chemistry
past papers
2011
77
asked
Aug 16, 2018
by
pady_1
1
answer
Which of the two ions from the list given below that have the geometry that is explained by the same hybridization of orbitals, $NO_2^-, NO_3^-, NH_2^-, NH_4^+, SCN^-$ ?
neet
chemistry
past papers
2011
76
asked
Aug 16, 2018
by
pady_1
3
answers
For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order? <br> (At nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)
neet
chemistry
past papers
2011
75
asked
Aug 16, 2018
by
pady_1
1
answer
Acidified $K_2Cr_2O_7$ solution turns green when $Na_2SO_3$ is added to it. This is due to the formation of :
neet
chemistry
past papers
2011
74
asked
Aug 16, 2018
by
pady_1
1
answer
The correct order of increasing bond length of $C – H, C – O, C – C$ and $C = C$ is :
neet
chemistry
past papers
2011
73
asked
Aug 16, 2018
by
pady_1
1
answer
Which of the following pairs of metals is purified by van Arkel method ?
neet
chemistry
past papers
2011
72
asked
Aug 16, 2018
by
pady_1
1
answer
Which of the following compounds has the lowest melting point ?
neet
chemistry
past papers
2011
71
asked
Aug 16, 2018
by
pady_1
1
answer
If n = 6, the correct sequence for filling of electrons will be :
neet
chemistry
past papers
2011
70
asked
Aug 16, 2018
by
pady_1
1
answer
Enthalpy change for the reaction, <br> $4H_{(g)} \to 2H_{2(g)}$ is $–869.6\;kJ$ <br> The dissociation energy of H – H bond is
neet
chemistry
past papers
2011
69
asked
Aug 16, 2018
by
pady_1
2
answers
Which one of the following statements for the order of a reaction is incorrect ?
neet
chemistry
past papers
2011
68
asked
Aug 16, 2018
by
pady_1
1
answer
Standard electrode potential of three metals X, Y and Z are –1.2 V, + 0.5 V and –3.0 V respectively. The reducing power of these metals will be :
neet
chemistry
past papers
2011
67
asked
Aug 16, 2018
by
pady_1
1
answer
The energies $E_1$ and $E_2$ of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e. $\lambda_1$ and $\lambda_2$ will be:
neet
chemistry
past papers
2011
66
asked
Aug 16, 2018
by
pady_1
1
answer
The freezing point depression constant for water is $–1.86\;Cm^{–1}$. If $5.00 \;g$ $Na_2SO_4$ is dissolved in $45.0g\; H_2O$, the freezing point is changed by $–3.82^o C$. Calculate the Van't Hoff factor for $Na_2SO_4$
neet
chemistry
past papers
2011
65
asked
Aug 16, 2018
by
pady_1
1
answer
If the $E^o_{cell}$ for a given reaction has a negative value, then which of the following gives the correct relationships for the values of $\Delta {G^o}$ and $K_{eq}$ ?
neet
chemistry
past papers
2011
64
asked
Aug 16, 2018
by
pady_1
1
answer
A gaseous mixture was prepared by taking equal mole of $CO$ and $N_2$. If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen $(N_2)$ in the mixture is :
neet
chemistry
past papers
2011
63
asked
Aug 16, 2018
by
pady_1
1
answer
Standard electrode potential for $Sn^{4+}/Sn^{2+}$ couple is $+0.15 V$ and that for the $Cr^{3+}/ Cr$ couple is $–0.74 V$. These two couples in their standard state are connected to make a cell. The cell potential will be :
neet
chemistry
past papers
2011
62
asked
Aug 16, 2018
by
pady_1
1
answer
The Van't Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively :
neet
chemistry
past papers
2011
61
asked
Aug 16, 2018
by
pady_1
1
answer
If the enthalpy change for the transition of liquid water to steam is $30\; kJ \; mol^{–1}$ at $27^oC$, the entropy change for the process would be :
neet
chemistry
past papers
2011
60
asked
Aug 16, 2018
by
pady_1
1
answer
If x is amount of adsorbate and m is amount of adsorbent, which of the following relations is not related to adsorption process ?
neet
chemistry
past papers
2011
59
asked
Aug 16, 2018
by
pady_1
1
answer
For the reaction $N_2 (g) + O_2(g) \leftrightharpoons 2NO (g)$, the equilibrium constant is $K_1$. The equilibrium constant is $K_2$ for the reaction $2NO(g) + O_2(g) \rightleftharpoons 2NO_2 (g).$ <br> What is $K$ for the reaction $NO_2 (g) \rightleftharpoons 1/2 N_2 (g) + O_2 (g)$ ?
neet
chemistry
past papers
2011
58
asked
Aug 16, 2018
by
pady_1
1
answer
Which of the following is correct option for free expansion of an ideal gas under adiabatic condition ?
neet
chemistry
past papers
2011
57
asked
Aug 16, 2018
by
pady_1
1
answer
Two gases A and B having the same volume diffuse through a porous partition in 20 and 10 seconds respectively. The molecular mass of A is 49 u. Molecular mass of B will be :
neet
chemistry
past papers
2011
56
asked
Aug 16, 2018
by
pady_1
1
answer
A buffer solution is prepared in which the concentration of $NH_3$ is 0.30 M and the concentration of $NH_4^+$ is 0.20 M. If the equilibrium constant, $K_b$ for $NH_3$ equals $1.8 × 10^{–5}$, what is the pH of this solution? ($\log 2.7 = 0.43$)
neet
chemistry
past papers
2011
55
asked
Aug 16, 2018
by
pady_1
1
answer
By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled ?
neet
chemistry
past papers
2011
54
asked
Aug 16, 2018
by
pady_1
1
answer
Mole fraction of the solute in a 1.00 molal aqueous solution is :
neet
chemistry
past papers
2011
53
asked
Aug 16, 2018
by
pady_1
1
answer
The electrode potentials for <br> $Cu^{2+}_{(aq)} + e^- \to Cu^+_{(aq)} $ <br> and $Cu^+ _{(aq)} + e^- \to Cu_{(s)}$ <br> are + 0.15 V and + 0.50 V respectively. The value of $E^o _{Cu^{2+}/Cu}$ will be :
neet
chemistry
past papers
2011
52
asked
Aug 16, 2018
by
pady_1
1
answer
The total number of atomic orbitals in fourth energy level of an atom is :
neet
chemistry
past papers
2011
51
asked
Aug 16, 2018
by
pady_1
1
answer
Symbolic representation of four logic gates are shown as : <br> <br> Pick out which ones are for AND, NAND and NOT gates, respectively :
neet
physics
past papers
2011
50
asked
Aug 16, 2018
by
pady_1
1
answer
In forward biasing of the p-n junction :
neet
physics
past papers
2011
49
asked
Aug 16, 2018
by
pady_1
1
answer
If a small amount of antimony is added to germanium crystal :
neet
physics
past papers
2011
48
asked
Aug 16, 2018
by
pady_1
1
answer
A transistor is operated in common emitter configuration at $V_C = 2V$ such that a change in the base current from 100 µA to 300 µA produces a change in the collector current from 10 mA to 20 mA. The current gain is :
neet
physics
past papers
2011
47
asked
Aug 16, 2018
by
pady_1
1
answer
A nucleus $_n^m{X}$ emits one α particle and two β– particles. The resulting nucleus is :
neet
physics
past papers
2011
46
asked
Aug 16, 2018
by
pady_1
1
answer
Fusion reaction takes place at high temperature because :
neet
physics
past papers
2011
45
asked
Aug 16, 2018
by
pady_1
1
answer
Photoelectric emission occurs only when the incident light has more than a certain minimum:
neet
physics
past papers
2011
44
asked
Aug 16, 2018
by
pady_1
2
answers
The half life of radioactive isotope 'X' is 50 years. It decays to another element 'Y' which is stable. The two elements 'X' and 'Y' were found to be in the ratio of 1 : 15 in a sample of a given rock. The age of the rock was estimated to be :
neet
physics
past papers
2011
43
asked
Aug 16, 2018
by
pady_1
1
answer
In the Davisson and Germer experiment, the velocity of electrons emitted from the electron gun can be increased by :
neet
physics
past papers
2011
42
asked
Aug 16, 2018
by
pady_1
1
answer
Light of two different frequencies whose photons have energies 1 eV and 2.5 eV respectively illuminate a metallic surface whose work function is 0.5 eV successively. Ratio of maximum speeds of emitted electrons will be :
neet
physics
past papers
2011
41
asked
Aug 16, 2018
by
pady_1
1
answer
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