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Answers posted by thanvigandhi_1
Questions
3013
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votes
Which of the following facts regarding boron and silicon is not true ?
answered
Jul 25, 2014
The halides of B and Al are hydrolysed.$BCl_3+3H_2O \rightarrow B(OH)_3 ( Boric \: acid ) + 3HCl$ an...
0
votes
Which of the following equations is not correctly formulated ?
answered
Jul 25, 2014
$H_3BO_3$ is a weak monobasic acid. It does not liberate $H^+$ but accepts $OH^-$, i.e, it is Lewis ...
0
votes
Which of the following statements is not correct ?
answered
Jul 24, 2014
The fluorides of $Al, Ga, In$ and $Tl$ are ionic in nature where the other halides are generally cov...
0
votes
Which of the following facts is not correct ?
answered
Jul 24, 2014
The structure of diborane ishttps://clay6.com/mpaimg/boron5.jpgThe two $BH_2$ groups lie in the same...
0
votes
Which of the following statements is not true ?
answered
Jul 24, 2014
The stability of +1 oxidation state increases down the group. This is because of the participation o...
0
votes
The atomic number of indium which belongs to 5th period is
answered
Jul 24, 2014
The atomic number of indium is 2+8+8+18+13 = 49Hence (C) is the correct answer.
0
votes
The number of elements in Group 13 is
answered
Jul 24, 2014
Boron group elements incorporate any of the six chemical elements forming Group 13 (IIIa) of the pe...
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votes
Which of the following elements does not belong to Group 13 of the periodic table ?
answered
Jul 24, 2014
Tin(D) is the correct answer.
0
votes
An equilateral triangle is inscribed in the parabola $ y^2 = 4 ax$, where one vertex is at the vertex of the parabola. Find the length of the side of the triangle
answered
Jul 24, 2014
Toolbox:General equation of a parabola which is open leftwards is $y^2=4ax$Step 1 :https://clay6.com...
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votes
A man running a racecourse notes that the sum of the distances from the two flag posts from him is always 10 m and the distance between the flag posts is 8 m. Find the equation of the posts traced by the man.
answered
Jul 24, 2014
Toolbox:Equation of an ellipse whose major axis is along the x - axis is given by $ \large\frac{x^2}...
0
votes
Find the area of the triangle formed by the lines joining the vertex of the parabola $ x^2 = 12y $ to the ends of its latus rectum.
answered
Jul 23, 2014
Toolbox:Standard equation of a parabola which is open rightward is $ y^2=4ax$ where a is the focus.S...
0
votes
A rod of length 12 cm moves with its ends always touching the coordinate axes. Determine the equation of the locus of a point P on the rod, which is 3 cm from the end in contact with the x-axis.
answered
Jul 23, 2014
Toolbox:Equation of an ellipse whose major axis is along the x - axis is given by $ \large\frac{x^2}...
0
votes
An arch is in the form of a semi-ellipse. It is 8 m wide and 2 m high at the centre. Find the height of the arch at a point 1.5 m from one end.
answered
Jul 23, 2014
Toolbox:Equation of an ellipse whose major axis is along the x - axis is given by $ \large\frac{x^2}...
0
votes
The cable of a uniformly loaded suspension bridge hangs in the form of a parabola. The roadway which is horizontal and 100 m long is supported by vertical wires attached to the cable, the longest wire being 30 m and the shortest being 6 m. Find the length of a supporting wire attached to the roadway 18 m from the middle.
answered
Jul 23, 2014
Toolbox:If the focus is on the positive y axis, then the parabola is open upwards, Hence the equatio...
0
votes
An arch is in the form of a parabola with its axis vertical. The arch is 10 m high and 5 m wide at the base. How wide is it 2 m from the vertex of the parabola?
answered
Jul 23, 2014
Toolbox:If the focus is on the positive y axis, then the parabola is open upwards, Hence the equatio...
0
votes
If a parabolic reflector is 20 cm in diameter and 5 cm deep, find the focus.
answered
Jul 23, 2014
Toolbox:Standard equation of a parabola which is open rightward is $ y^2=4ax$ where a is the focus.S...
0
votes
Find the equations of the hyperbola satisfying the given conditions : Foci $(0, \pm \sqrt{ 10} )$ , passing through $(2,3 )$
answered
Jul 21, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the equations of the hyperbola satisfying the given conditions : vertices $(\pm 7,0 ) , e = \large\frac{4}{3}$
answered
Jul 21, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the equations of the hyperbola satisfying the given conditions : Foci $(\pm 4, 0)$, the latus rectum is of length $12$
answered
Jul 21, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the equations of the hyperbola satisfying the given conditions : Foci $(\pm 3\sqrt 5 , 0)$, the latus rectum is of length $8$
answered
Jul 21, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the equations of the hyperbola satisfying the given conditions : Foci $(0, \pm13)$, the conjugate axis is of length $24$.
answered
Jul 21, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the equations of the hyperbola satisfying the given conditions : Foci $(\pm 5, 0)$, the transverse axis is of length $8$
answered
Jul 21, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the equations of the hyperbola satisfying the given conditions : Vertices $(0, \pm 3),$ foci $(0, \pm 5)$
answered
Jul 21, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the equations of the hyperbola satisfying the given conditions : Vertices $(0, \pm 5),$ foci $(0, \pm 8)$
answered
Jul 21, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the equations of the hyperbola satisfying the given conditions : Vertices $(\pm 2, 0),$ foci $(\pm 3, 0)$
answered
Jul 19, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the coordinates of the foci and the vertices, the eccentricity and the length of the latus rectum of the hyperbolas : $49y^2 – 16x^2 = 784$
answered
Jul 19, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the coordinates of the foci and the vertices, the eccentricity and the length of the latus rectum of the hyperbolas : $5y^2-9x^2=36$
answered
Jul 19, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the coordinates of the foci and the vertices, the eccentricity and the length of the latus rectum of the hyperbolas : $ 16x^2-9y^2=576$
answered
Jul 19, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the coordinates of the foci and the vertices, the eccentricity and the length of the latus rectum of the hyperbolas : $9y^2–4x^2= 36$
answered
Jul 19, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the coordinates of the foci and the vertices, the eccentricity and the length of the latus rectum of the hyperbolas : $ \large\frac{y^2}{9}-\large\frac{x^2}{27}=1$
answered
Jul 19, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the coordinates of the foci and the vertices, the eccentricity and the length of the latus rectum of the hyperbolas : $ \large\frac{x^2}{16}-\large\frac{y^2}{9}=1$
answered
Jul 19, 2014
Toolbox:Standard equation of a hyperbola where transverse axis is along x - axis is $ \large\frac{x^...
0
votes
Find the equation for the ellipse that satisfies the given conditions : Major axis on the x-axis and passes through the points $(4,3)$ and $(6,2)$.
answered
Jul 18, 2014
Toolbox:Length of the major axis is 2a Length of the minor axis is 2b Equation of an ellipse whose m...
0
votes
Find the equation for the ellipse that satisfies the given conditions : Centre at $(0,0),$ major axis on the y-axis and passes through the points $(3, 2)$ and $(1, 6)$
answered
Jul 18, 2014
Toolbox:Length of the major axis is 2a Length of the minor axis is 2b Equation of an ellipse whose m...
0
votes
Find the equation for the ellipse that satisfies the given conditions : b = 3, c = 4, centre at the origin; foci on the x axis
answered
Jul 18, 2014
Toolbox:Length of the major axis is 2a Length of the minor axis is 2b Equation of an ellipse whose m...
0
votes
Find the equation for the ellipse that satisfies the given conditions : Foci $(\pm 3, 0), a = 4$
answered
Jul 18, 2014
Toolbox:Length of the major axis is 2a Length of the minor axis is 2b Equation of an ellipse whose m...
0
votes
Find the equation for the ellipse that satisfies the given conditions : Length of minor axis $16$, foci $(0, \pm 6).$
answered
Jul 18, 2014
Toolbox:Length of the major axis is 2aLength of the minor axis is 2bEquation of an ellipse whose maj...
0
votes
Find the equation for the ellipse that satisfies the given conditions : Length of major axis $26,$ foci $(\pm 5, 0)$
answered
Jul 18, 2014
Toolbox: Length of the major axis is 2a Length of the minor axis is 2b Equatio...
0
votes
Find the equation for the ellipse that satisfies the given conditions : Ends of major axis $ (0, \pm \sqrt 5 )$, ends of minor axis $(\pm 1, 0)$
answered
Jul 18, 2014
Toolbox:If the major axis is along x - axis then the equation of ellipse is $\large\frac{x^2}{a^2}$$...
0
votes
Find the equation for the ellipse that satisfies the given conditions : Ends of major axis $(\pm 3, 0)$ , ends of minor axis $(0, \pm 2)$
answered
Jul 18, 2014
Toolbox:If the major axis is along x - axis then the equation of ellipse is $\large\frac{x^2}{a^2}$$...
0
votes
Find the equation for the ellipse that satisfies the given conditions : Vertices $ (\pm 6, 0), foci (\pm 4, 0)$
answered
Jul 18, 2014
Toolbox:If the major axis is along x - axis then the equation of ellipse is $\large\frac{x^2}{a^2}$$...
0
votes
Find the equation for the ellipse that satisfies the given conditions : Vertices $ (0, \pm 13), foci (0, \pm 5)$
answered
Jul 16, 2014
Toolbox:If the major axis is along x - axis then the equation of ellipse is $\large\frac{x^2}{a^2}$$...
0
votes
Find the equation for the ellipse that satisfies the given conditions : Vertices $(\pm 5, 0), foci (\pm 4, 0)$
answered
Jul 16, 2014
Toolbox: If the major axis is along x - axis then the equation of ellipse is $\large\frac{...
0
votes
Find the coordinates of the foci, the vertices, the length of major axis, the minor axis, the eccentricity and the length of the latus rectum of the ellipse : $ 4x^2+9y^2=36$
answered
Jul 16, 2014
Toolbox:Equation of an ellipse along major axis is $\large\frac{x^2}{a^2}$$+\large\frac{y^2}{b^2}$$=...
0
votes
Find the coordinates of the foci, the vertices, the length of major axis, the minor axis, the eccentricity and the length of the latus rectum of the ellipse : $ 16x^2 +y^2= 16$
answered
Jul 16, 2014
Toolbox:If $b > a $ then the major axis is y - axis and the minor axis is along x - axis. Hence t...
0
votes
Find the coordinates of the foci, the vertices, the length of major axis, the minor axis, the eccentricity and the length of the latus rectum of the ellipse : $ 36x^2 + 4y^2 = 144$
answered
Jul 16, 2014
Toolbox:If $b > a $ then the major axis is y - axis and the minor axis is along x - axis. Hence t...
0
votes
Find the coordinates of the foci, the vertices, the length of major axis, the minor axis, the eccentricity and the length of the latus rectum of the ellipse : $ \large\frac{x^2}{100}$$+ \large\frac{y^2}{400}$$=1$
answered
Jul 16, 2014
Toolbox:If $b > a $ then the major axis is y - axis and the minor axis is along x - axis. Hence t...
0
votes
Find the coordinates of the foci, the vertices, the length of major axis, the minor axis, the eccentricity and the length of the latus rectum of the ellipse : $ \large\frac{x^2}{49}$$+\large\frac{y^2}{36}$$=1$
answered
Jul 15, 2014
Toolbox:Equation of an ellipse along major axis is $\large\frac{x^2}{a^2}$$+\large\frac{y^2}{b^2}$$=...
0
votes
Find the coordinates of the foci, the vertices, the length of major axis, the minor axis, the eccentricity and the length of the latus rectum of the ellipse : $ \large\frac{x^2}{25}$$+\large\frac{y^2}{100}$$=1$
answered
Jul 15, 2014
Toolbox:If $b > a $ then the major axis is y - axis and the minor axis is along x - axis. Hence t...
0
votes
Find the coordinates of the foci, the vertices, the length of major axis, the minor axis, the eccentricity and the length of the latus rectum of the ellipse : $ \large\frac{x^2}{16}$$ +\large\frac{y^2}{9}$$=1$
answered
Jul 15, 2014
Toolbox:Equation of an ellipse along major axis is $\large\frac{x^2}{a^2}$$+\large\frac{y^2}{b^2}$$=...
0
votes
Find the coordinates of the foci, the vertices, the length of major axis, the minor axis, the eccentricity and the length of the latus rectum of the ellipse : $\large\frac{x^2}{4}$$+\large\frac{y^2}{25}$$=1$
answered
Jul 15, 2014
Toolbox:If $b > a $ then the major axis is y - axis and the minor axis is along x - axis. Hence t...
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