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Recent questions tagged set-01
ASK
The contrapositive of the statement " I go to school if it does not rain " is :
jeemain
mathematics
2014
set-01
asked
May 8, 2014
by
yamini.v
0
answers
If $\;cosec\theta = \large\frac{p+q}{p-q}\;(p \neq q \neq 0)\;$, then $\;|cot(\large\frac{\pi}{4} + \large\frac{\theta}{2})|\;$ is equal to :
jeemain
mathematics
2014
set-01
asked
May 8, 2014
by
yamini.v
0
answers
The number of values of $\;\alpha\;$ in $\;[0,2\pi]\;$ for which $\;2 sin^{3} \alpha -7 sin^{2} \alpha + 7 sin \alpha =2\;$is :
jeemain
mathematics
2014
set-01
asked
May 8, 2014
by
yamini.v
0
answers
If A and B are two events such that $\;P(A) \cup P(B) = P(A) \cap P(B)\;$ , then the incorrect statement amongst the following statements is :
jeemain
mathematics
2014
set-01
asked
May 8, 2014
by
yamini.v
0
answers
In a set of 2n distinct observations , each of the observation below the median of all the observations is increased by 5 and each of the remaining observations is decreased by 3.Then the mean of the new set of observations :
jeemain
mathematics
2014
set-01
asked
May 8, 2014
by
yamini.v
0
answers
If $\;\overrightarrow{|a|}=3\;,\overrightarrow{|b|}=3 \;$ and $\;|2\overrightarrow{a} - \overrightarrow{b}|=5\;$ , then $\;|2\overrightarrow{a} + \overrightarrow{b}|\;$ equals :
jeemain
mathematics
2014
set-01
asked
May 8, 2014
by
yamini.v
0
answers
A line in the 3 - dimensional space makes an angle $\;\theta (0 < \theta < \large\frac{\pi}{2})\;$ with both the x and y axes . Then the set of values of $\;\theta \;$ is the interval :
jeemain
mathematics
2014
set-01
asked
May 8, 2014
by
yamini.v
0
answers
Equation of the plane which passes through the point of intersection of lines $\;\large\frac{x-1}{3} = \large\frac{y-2}{1}=\large\frac{z-3}{2}\;$ and $\;\large\frac{x-3}{1}=\large\frac{y-1}{2}=\large\frac{z-2}{3}\;$ and has the largest distance from the origin is :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
If OB is the semi - minor axis of an ellipse ,$\;F_{1}\;$ and $\;F_{2}\;$ are its foci and the angle between $\;F_{1}B\;$ and $\;F_{2}B\;$ is a right angle , then the square of the eccentricity of the ellipse is :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
If the point (1,4) lies inside the circle $\;x^{2}+y^{2}-6x-10y+p=0\;$ and the circle does not touch or intersect the coordinate axes , then the set of all possible values of P in the interval :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
1
answer
Given three points P,Q,R with P(5,3) and R lies on the x - axis . if equation of RQ is $\;x-2y=2\;$ and PQ is parallel to the x - axis , then the centroid of $\;\bigtriangleup PQR\;$ lies on the line :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
Let a and b be any two numbers satisfying $\;\large\frac{1}{a^{2}}+\large\frac{1}{b^{2}} =\large\frac{1}{4} \;$, then the foot of perpendicular from the origin on the variable line,$\;\large\frac{x}{a} + \large\frac{y}{b}=1\;$ , lies on
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
1
answer
If the differential equation representing the family of all circles touching x - axis at the origin is $\;(x^{2}-y^{2})\large\frac{dy}{dx}=g(x) y\;$, then $\;g(x)\;$ equals :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
Let $\;A =\{ (x,y) : y^{2} \leq 4x \;, y-2x \leq -4\}\;$. The area (in square units) of the region A is :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
The integral $\;\int_{0}^{\large\frac{1}{2}} \large\frac{ln(1+2x)}{1+4x^{2}} dx\;$ , equals :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
$\;\int \large\frac{sin^{8} x -cos^{8} x}{(1-2 sin^{2}x cos^{2} x)} dx\;$ is equal to :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
If $\;f(x) = (\large\frac{3}{5})^{x}+ (\large\frac{4}{5})^{x}-1\;,x \in R \;$, then the equation $\;f(x) =0\;$ has :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
1
answer
If the Rolle's theorem holds for the function $\;f(x) = 2x^{3}+ax^{2}+bx\;$ in the interval $\; [-1 ,1]\;$ for the point $\;c=\large\frac{1}{2}\;$ then the value of 2a+b is :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
1
answer
If $\;y=e^{nx}\;$ , then $\;(\large\frac{d^{2}y}{dx^{2}}) (\large\frac{d^{2} x}{dy^{2}})\;$ is equal to :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
If $\;f(x)\;$ is continuous and $\;f(\large\frac{9}{2}) = \large\frac{2}{9}\;$ , then $\;\lim_{x}^{0} f(\large\frac{1-cos 3x}{x^{2}})\;$ is equal to :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
1
answer
If the sum $\; \large\frac{3}{1^{2}} + \large\frac{5}{1^{2} + 2^{2}} + \large\frac{7}{1^{2} + 2^{2} +3^{2}}+----+\;$ upto 20 terms is equal to $\;\large\frac{k}{21}\;$, then k is equal to :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
1
answer
Given an A.P. whose terms are all positive integers . The sum its first nine terms is greater than 200 and less than 220 . If the second term in it is 12 , then its $\;4^{th}\;$ term is :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
1
answer
The sum of the digits in the unit's place of all the 4-digit numbers formed by using the numbers 3,4,5 and 6 , without repetition is :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
The number of terms in the expression of $\;(1+x)^{101}\;(1+x^{2}-x)^{100}\;$ in powers of x is :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
If B is $\;3 \times 3\;$ matrix such that $\;B^{2}=0\;$ then det.$[(I+B)^{50}-50B] \;$ is equal to :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
If a,b,c are non - zero real numbers and if the system of equations $\;(a-1)x =y+z\;,(b-1)y=(z+x)\;,(c-1)z=x-y\;$ , has a non - trivial solution , then ab+bc+ca equals :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
If $\;\large\frac{1}{\sqrt{\alpha}}\;$ and $\;\large\frac{1}{\sqrt{\beta}}\;$ are the roots of the equation ,$\;ax^{2}+bx+c=0 \;(a \neq 0 , q ,b \in R)\;$, then the equation , $\;x(x+b^{3}) + (a^{3}-3abx)=0\;$ has roots :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
1
answer
If equations $\;ax^{2}+bx+c=0\;, (a,b,c \in R\;, a \neq 0)\;$ and $\;2x^{2}+3x+4=0\;$ have a common root then $\;a : b: c\;$ equals :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
1
answer
Let $\;w(Im\;w \neq 0)\;$ be a complex number.Then the set of all complex numbers z satisfying the equation $\;w - w \overline{w}z=k(1-z)\;$ , for some real number k , is :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
Let P be the relation defined on the set of all real numbers such that $\;P = \{ (a,b) : sec^{2}a - tan^{2} b=1\}$ . Then P is :
jeemain
mathematics
2014
set-01
asked
May 7, 2014
by
yamini.v
0
answers
For the compounds $\;CH_{3}Cl \;,CH_{3}Br\; ,CH_{3}I\;$ and $\;CH_{3}F\;$ , the correct order of increasing C - halogen bond length is :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
Which one of the following class of compounds is obtained by polymerization of acetylene ?
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
Which is the major product formed when acetone is heated with iodine and potassium hydroxide ?
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
In the hydroboration - oxidation reaction of propene with diborane , $\;H_{2}O_{2}\;$ and $\;NaOH\;$ the organic compound formed is :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
Which one of the following reactions will not result in the formation of carbon - carbon bond :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
The correct statement about the magnetic properties of $\;[Fe(CN)_{6}]^{3-}\;$ and $\;[FeF_{6}]^{3-}\;$ is : (Z=26)
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
The form of iron obtained from blast furnace is :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
The number and type of bonds in $\;C_{2}^{2-}\;$ ion in $\;CaC_{2}\;$ are :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
Which of the following has unpaired electron(s) ?
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
Which of the following is not formed when $\;H_{2}S\;$ reacts with acidic $\;K_{2}Cr_{2}O_{7}\;$ solution ?
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
An octahedral complex of $\;Co^{3+}\;$ is diamagnetic .The hybridisation involved in the formation of the complex is :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
Chloro compound of vanadium has only spin magnetic momentum of 1.73 BM . This vanadium chloride has the formula : (at . no. of V=23)
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
The gas evolved on heating $\;CaF_{2}\;$ and $\;SiO_{2}\;$ with concentrated $\;H_{2}SO_{4}\;$ ,on hydrolysis gives a white gelatinous precipitate . The precipitate is :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
The amount of oxygen in 3.6 moles of water is :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
The standard enthalpy of formation of $\;NH_{3}\;$ is -46.0 kJ/mol . If the enthalpy of formation $\;H_{2}\;$ from its atoms is -436 kJ/mol and that of $\;N_{2}\;$ is -712 kJ/mol , the average bond enthalpy of N-H bond in $\;NH_{3}\;$ is :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
The temperature at which oxygen molecules have the same root mean square speed as helium atoms have at 300 K is : (Atomic masses : He=4 u , O=16 u)
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
The energy of an electron in first Bohr orbit of H -atom is -13.6 eV .The energy value of electron in the excited state of $\;Li^{2+}\;$ is :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
A current of 10.0 A flows for 2.00 h through an electrolytic cell containing a molten salt of metal X . This results in the decomposition of 0.250 mol of metal X at the cathode . The oxidation state of X in the molten salt is : (F=96,500 C)
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
The half-life period of a first order reaction is 15 minutes. The amount of substance left after one hour will be :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
Dissolving 120 g of a compound of (mol .wt .60) in 1000 g of water gave a solution of density 1.12 g/mL . The molarity of the solution is :
jeemain
chemistry
2014
set-01
asked
May 6, 2014
by
yamini.v
0
answers
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