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Recent questions tagged 2014
Questions
The most suitable reagent for the conversion of $R-CH_2- OH \to R - CHO$ is:
jeemain
chemistry
past papers
2014
90
asked
Dec 11, 2018
by
pady_1
1
answer
For complete combustion of ethanol, $C_2H_5OH (\ell) + 3O_2 (g) \to 2CO_2 (g) + 3H_2O (\ell)$, the amount of heat produced as measured in bomb calorimeter, is $1364.47\; kJ \;mol^{–1}$ at $25^{\circ}C$. Assuming ideality the Enthalpy of combustion, $\Delta_CH$, for the reaction will be: $(R = 8.314\; kJ \;mol^{–1} )$
jeemain
chemistry
past papers
2014
89
asked
Dec 11, 2018
by
pady_1
0
answers
Among the following oxoacids, the correct decreasing order of acid strength is:
jeemain
chemistry
past papers
2014
88
asked
Dec 11, 2018
by
pady_1
0
answers
Which one is classified as a condensation polymer?
jeemain
chemistry
past papers
2014
87
asked
Dec 11, 2018
by
pady_1
0
answers
The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is:
jeemain
chemistry
past papers
2014
86
asked
Dec 11, 2018
by
pady_1
0
answers
Given below are the half-cell reactions : <br> $Mn^{2+} + 2e^- \to Mn; \; E^0 = -1.18 \;V$ <br> $2(Mn^{3+} + e^- \to Mn^{2+} ) \; ; E^0 = +1.51 \; V$ <br> The $E^0$ for $2Mn^{2+} \to Mn + 2Mn^{3+} $ will be :
jeemain
chemistry
past papers
2014
85
asked
Dec 11, 2018
by
pady_1
0
answers
The major organic compound formed by the reaction of 1, 1, 1-trichloroethane with silver powder is :
jeemain
chemistry
past papers
2014
84
asked
Dec 11, 2018
by
pady_1
0
answers
The correct set of four quantum numbers for the valence elections of rubidium atom (Z= 37) is:
jeemain
chemistry
past papers
2014
83
asked
Dec 11, 2018
by
pady_1
0
answers
Which one of the following bases is not present in DNA?
jeemain
chemistry
past papers
2014
82
asked
Dec 11, 2018
by
pady_1
0
answers
Considering the basic strength of amines in aqueous solution, which one has the smallest $pK_b$ value?
jeemain
chemistry
past papers
2014
81
asked
Dec 11, 2018
by
pady_1
0
answers
Which series of reactions correctly represents chemical reactions related to iron and its compound?
jeemain
chemistry
past papers
2014
80
asked
Dec 11, 2018
by
pady_1
0
answers
For the non â€“ stoichiometre reaction $2A +B \to C + D$ , the following kinetic data were obtained in three separate experiments, all at $298\; K$. <br> <br> The rate law for the formation of C is:
jeemain
chemistry
past papers
2014
79
asked
Dec 11, 2018
by
pady_1
0
answers
For which of the following molecule significant $\mu \neq 0$? <br>
jeemain
chemistry
past papers
2014
78
asked
Dec 11, 2018
by
pady_1
0
answers
The equation which is balanced and represents the correct product(s) is:
jeemain
chemistry
past papers
2014
77
asked
Dec 11, 2018
by
pady_1
0
answers
The correct statement for the molecule, $CsI_3$ is:
jeemain
chemistry
past papers
2014
76
asked
Dec 11, 2018
by
pady_1
0
answers
On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is:
jeemain
chemistry
past papers
2014
75
asked
Dec 11, 2018
by
pady_1
0
answers
Sodium phenoxide when heated with $CO_2$ under pressure at $125^{\circ}C$ yields a product which on acetylation produces $C$. <br> <br>The major product C would be:
jeemain
chemistry
past papers
2014
74
asked
Dec 11, 2018
by
pady_1
0
answers
In the reaction, <br> $CH_3COOH \xrightarrow{LiAlH_4} A \xrightarrow{PCl_5} B \xrightarrow{Alc. KOH} C$, <br> the product C is :
jeemain
chemistry
past papers
2014
73
asked
Dec 11, 2018
by
pady_1
0
answers
For the reaction, $SO_{2(g)} + \frac{1}{2}O_{2(g)} \leftrightharpoons SO_{3(g)}$, if $K_P = K_C(RT)^x$ where the symbols have usual meaning then the value of $x$ is: (assuming ideality)
jeemain
chemistry
past papers
2014
72
asked
Dec 11, 2018
by
pady_1
0
answers
The equivalent conductance of NaCl at concentration C and at infinite dilution are $\lambda_C$ and $\lambda_{\infty}$, respectively. The correct relationship between $\lambda_C$ and $\lambda_{\infty}$ is given as: <br> (where the constant B is positive)
jeemain
chemistry
past papers
2014
71
asked
Dec 11, 2018
by
pady_1
0
answers
For the estimation of nitrogen, $1.4\; g$ of organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in $60 \;mL$ of $\frac{M}{10}$ sulphuric acid. The unreacted acid require$20\; ml$ of $\frac{M}{10}$ sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is:
jeemain
chemistry
past papers
2014
70
asked
Dec 11, 2018
by
pady_1
0
answers
The octahedral complex of a metal ion $M^{3+}$ with four monodentate ligands $L_1, L_2, L_3$ and $L_4$ absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is:
jeemain
chemistry
past papers
2014
69
asked
Dec 11, 2018
by
pady_1
0
answers
In $S_N2$ reactions, the correct order of reactivity for the following compounds: <br> $CH_3Cl, \;CH_3CH_2Cl,\; (CH_3)_2CHCl$ and $(CH_3)_3CCl$ is:
jeemain
chemistry
past papers
2014
68
asked
Dec 11, 2018
by
pady_1
0
answers
In which of the following reactions $H_2O_2$ acts as a reducing agent? <br>(a) $H_2O_2 +2H^+ + 2e^- \to 2H_2O$ <br> (b) $H_2O_2 - 2e^- \to O_2 + 2H^+$ <br> (c) $H_2O_2 + 2e^- \to 2OH^- $ <br> (d) $H_2O_2 + 2OH^- - 2e^- \to O_2 + 2H_2O$
jeemain
chemistry
past papers
2014
67
asked
Dec 11, 2018
by
pady_1
0
answers
Consider separate solutions of $0.500\; M\; C_2H_5OH(aq),\; 0.100\; M \;Mg_3(PO_4)_2(aq),\; 0.250\; M\; KBr(aq)$ and $0.125 \;M \;Na_3PO_4(aq)$ at $25^{\circ}C$. Which statement is true about these solutions, assuming all salts to be strong electrolytes?
jeemain
chemistry
past papers
2014
66
asked
Dec 11, 2018
by
pady_1
0
answers
CsCl crystallises in body centred cubic lattice. If ‘a’ is its edge length then which of the following expressions is correct?
jeemain
chemistry
past papers
2014
65
asked
Dec 11, 2018
by
pady_1
0
answers
Resistance of $0.2\; M$ solution of an electrolyte is $50 \Omega$. The specific conductance of the solution is $1.4 \;S m^{-1}$ . The resistance of $0.5\; M$ solution of the same electrolyte is $280 \Omega$. The molar conductivity of $0.5\; M$ solution of the electrolyte in $S \;m^2 mol^{-1}$ is:
jeemain
chemistry
past papers
2014
64
asked
Dec 11, 2018
by
pady_1
0
answers
The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is:
jeemain
chemistry
past papers
2014
63
asked
Dec 11, 2018
by
pady_1
0
answers
If Z is a compressibility factor, van der Waals equation at low pressure can be written as:
jeemain
chemistry
past papers
2014
62
asked
Dec 11, 2018
by
pady_1
0
answers
Which one of the following properties is not shown by NO?
jeemain
chemistry
past papers
2014
61
asked
Dec 11, 2018
by
pady_1
0
answers
If $x = -1$ and $x = 2$ are extreme points of $f(x) = \alpha \log |x| + \beta x^2 + x$, then
jeemain
math
past papers
2014
60
asked
Dec 11, 2018
by
pady_1
1
answer
The slope of the line touching both the parabolas $y^2 = 4x$ and $x^2 = -32y$ is
jeemain
math
past papers
2014
59
asked
Dec 11, 2018
by
pady_1
1
answer
The angle between the lines whose direction cosines satisfy the equations $l + m + n = 0$ and $l^2 = m^2 + n^2$ is
jeemain
math
past papers
2014
58
asked
Dec 11, 2018
by
pady_1
1
answer
If $(10)^9 + 2(11)^1 (10)^8 + 3(11)^2 (10)^7 + ....+ 10(11)^9 = k(10)^9$, then $k$ is equal to
jeemain
math
past papers
2014
57
asked
Dec 11, 2018
by
pady_1
1
answer
Three positive numbers from an increasing G.P. If the middle term in this G.P. is doubled, the new numbers are in A.P. Then the common ratio of the G.P. is
jeemain
math
past papers
2014
56
asked
Dec 11, 2018
by
pady_1
1
answer
The locus of the foot of perpendicular drawn from the centre of the ellipse $x^2 + 3y^2 = 6$ on any tangent to it is
jeemain
math
past papers
2014
55
asked
Dec 11, 2018
by
pady_1
1
answer
If $X = \{4^n - 3n - 1 : n \in N\}$ and $Y = \{9(n - 1) : n \in N\}$, where $N$ is the set of natural numbers, then $X \cup Y$ is equal to
jeemain
math
past papers
2014
54
asked
Dec 11, 2018
by
pady_1
1
answer
$\displaystyle{\lim_{x \to 0} \frac{\sin( \pi \cos^2 x)} {x^2}}$ is equal to
jeemain
math
past papers
2014
53
asked
Dec 11, 2018
by
pady_1
1
answer
Let PS be the median of the triangle with vertices $P(2, 2), Q(6, -1)$ and $R(7, 3)$. The equation of the line passing through $(1, -1)$ and parallel to PS is
jeemain
math
past papers
2014
52
asked
Dec 11, 2018
by
pady_1
1
answer
Let $a, b, c$ and d be non-zero numbers. If the point of intersection of the lines $4ax + 2ay + c = 0$ and $5bx + 2by + d = 0$ lies in the fourth quadrant and is equidistant from the two axes then
jeemain
math
past papers
2014
51
asked
Dec 11, 2018
by
pady_1
1
answer
The area of the region described by $A = \{(x, y) : x^2 + y^2 \leq 1$ and $y^2 \leq 1 - x\}$ is
jeemain
math
past papers
2014
50
asked
Dec 11, 2018
by
pady_1
1
answer
Let C be the circle with centre at $(1, 1)$ and $radius = 1$. If T is the circle centred at $(0, y)$, passing through origin and touching the circle C externally, then the radius of T is equal to
jeemain
math
past papers
2014
49
asked
Dec 11, 2018
by
pady_1
1
answer
Let the population of rabbits surviving at a time t be governed by the differential equation $\frac{dp(t)}{dt} = \frac{1}{2} p(t) - 200$ . If $p(0) = 100$, then $p(t)$ equals
jeemain
math
past papers
2014
48
asked
Dec 11, 2018
by
pady_1
1
answer
If f and g are differentiable functions in $[0, 1]$ satisfying $f(0) = 2 = g(1), g(0) = 0 $ and $f(1) = 6$, then for some $c \in ]0, 1[$
jeemain
math
past papers
2014
47
asked
Dec 11, 2018
by
pady_1
1
answer
et A and B be two events such that $P (\overline{A \cup B}) = \frac{1}{6} , \; P ( A \cap B) = \frac{1}{4} $ and $P(\overline{A}) = \frac{1}{4}$ , where $\overline{A}$ stands for the complement of the event A. Then the events A and B are
jeemain
math
past papers
2014
46
asked
Dec 11, 2018
by
pady_1
1
answer
Let $\alpha$ and $\beta$ be the roots of equation $px^2 + qx + r = 0,\; p \neq 0$. If $p, q, r$ are in A.P. and $\frac{1}{\alpha} + \frac{1}{\beta} = 4$, then the value of $|\alpha - \beta|$ is
jeemain
math
past papers
2014
45
asked
Dec 11, 2018
by
pady_1
1
answer
Let $f_K(x) = \frac{1}{k} (\sin^k x + \cos^k x)$ where $x \in R$ and $k \geq 1$. Then $f_4(x) - f_6(x)$ equals
jeemain
math
past papers
2014
44
asked
Dec 11, 2018
by
pady_1
1
answer
If $\alpha, \beta \neq 0$, and $f(n) = \alpha^n + \beta^n$ and $ \begin{vmatrix} 3 & 1+f(1) & 1+f(2) \\ 1+f(1) & 1+f(2) & 1+f(3) \\ 1+f(2) & 1+f(3) &1+f(4) \end{vmatrix} = K(1 - \alpha)^2 (1 - \beta)^2 (\alpha - \beta)^2$, then $K$ is equal to
jeemain
math
past papers
2014
43
asked
Dec 11, 2018
by
pady_1
1
answer
If $g$ is the inverse of a function $f$ and $f'(x) = \frac{1}{1+x^5}$ , then $g'(x)$ is equal to
jeemain
math
past papers
2014
42
asked
Dec 11, 2018
by
pady_1
1
answer
If z is a complex number such that $|z| \geq 2$, then the minimum value of $| x + \frac{1}{2} |$
jeemain
math
past papers
2014
41
asked
Dec 11, 2018
by
pady_1
1
answer
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