Maths-
General
Easy
Question
In the standard ellipse, the lines joining the ends of the minor axis to one focus are at right angles. The distance between the focus and the nearer vertex is 
The equation of the ellipse
The correct answer is:
Related Questions to study
chemistry-
Three metal ions x+2, y+2, z+2 are identify in qualitative analysis. Nitrates of x+2, y+2, z+2 dissolve in three seprate test tubes and gives following observation.
i) All solution produce carbonate precipitate with (NH4 )2CO3
ii) Only one produce white ppt on addition of NaCl.
iii) Out of 3 cations two produce sulphide ppt.
iv) Sulphide of y+2 is not produce by H2S/H+ but produce when H2S is passed in basic medium.
v) Only y+2 produce soluble sulphate
vi) x +2 gives no ppt with dil NH4OH
Select correct about xCO3 , y CO3 , z CO3 -
Three metal ions x+2, y+2, z+2 are identify in qualitative analysis. Nitrates of x+2, y+2, z+2 dissolve in three seprate test tubes and gives following observation.
i) All solution produce carbonate precipitate with (NH4 )2CO3
ii) Only one produce white ppt on addition of NaCl.
iii) Out of 3 cations two produce sulphide ppt.
iv) Sulphide of y+2 is not produce by H2S/H+ but produce when H2S is passed in basic medium.
v) Only y+2 produce soluble sulphate
vi) x +2 gives no ppt with dil NH4OH
Select correct about xCO3 , y CO3 , z CO3 -
chemistry-General
chemistry-
Read the following comprehension carefully and answer the following questions
Read the following comprehension carefully and answer the following questions
chemistry-General
chemistry-
Read the following comprehension carefully and answer the following questions
The compound
Read the following comprehension carefully and answer the following questions
The compound
chemistry-General
chemistry-
Read the following comprehension carefully and answer the following questions
Yellow solution (C) is an important laboratory reagent and is used in the estimation of :
Read the following comprehension carefully and answer the following questions
Yellow solution (C) is an important laboratory reagent and is used in the estimation of :
chemistry-General
chemistry-
Read the following comprehension carefully and answer the following questions
The colour of the ppt (D) & (E) are :
Read the following comprehension carefully and answer the following questions
The colour of the ppt (D) & (E) are :
chemistry-General
chemistry-
Moreover, the salt 'A' on heating with solid K2Cr2O7 and concentrated H2SO4 produces deep red vapours which dissolve in sodium hydroxide solution forming a yellow solution. This yellow solution gives yellow precipitate with Ba(NO3 ) 2 solution. On the basis of the aforesaid characteristic informations answer the following questions :
Select the correct statement.
Moreover, the salt 'A' on heating with solid K2Cr2O7 and concentrated H2SO4 produces deep red vapours which dissolve in sodium hydroxide solution forming a yellow solution. This yellow solution gives yellow precipitate with Ba(NO3 ) 2 solution. On the basis of the aforesaid characteristic informations answer the following questions :
Select the correct statement.
chemistry-General
chemistry-
Statement-1 : Nessler’s reagent gives a brown precipitate with aqueous ammonia as well as with ammonium salts. Statement-2 : Aqueous ammonia gives a brown precipitate with a solution of manganese (II) chloride and hydrogen peroxide.
Statement-1 : Nessler’s reagent gives a brown precipitate with aqueous ammonia as well as with ammonium salts. Statement-2 : Aqueous ammonia gives a brown precipitate with a solution of manganese (II) chloride and hydrogen peroxide.
chemistry-General
chemistry-
Statement-1 : A solution containing S2– ions gives purple / violet colour with sodium nitroprusside solution in alkaline medium.
Statement-2 : Sodium sulphide gives black precipitate with silver nitrate solution.
Statement-1 : A solution containing S2– ions gives purple / violet colour with sodium nitroprusside solution in alkaline medium.
Statement-2 : Sodium sulphide gives black precipitate with silver nitrate solution.
chemistry-General
chemistry-
Which of the following pairs comprises the red precipitates ?
Which of the following pairs comprises the red precipitates ?
chemistry-General
chemistry-
A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid, a white precipitate with dilute sulphuric acid, but gives no precipitate with sodium chloride or iodide, it is :
A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid, a white precipitate with dilute sulphuric acid, but gives no precipitate with sodium chloride or iodide, it is :
chemistry-General
physics-
A unit positive point charge of mass m is projected with a velocity V inside the tunnel as shown. The tunnel has been made inside a uniformly charged non conducting sphere. The minimum velocity with which the point charge should be projected such it can it reach the opposite end of the tunnel, is equal to
A unit positive point charge of mass m is projected with a velocity V inside the tunnel as shown. The tunnel has been made inside a uniformly charged non conducting sphere. The minimum velocity with which the point charge should be projected such it can it reach the opposite end of the tunnel, is equal to
physics-General
physics-
The diagram shows a small bead of mass m carrying charge q. The bead can freely move on the smooth fixed ring placed on a smooth horizontal plane. In the same plane a charge +Q has also been fixed as shown. The potential at the point P due to +Q is V. The velocity with which the bead should projected from the point P so that it can complete a circle should be greater than
The diagram shows a small bead of mass m carrying charge q. The bead can freely move on the smooth fixed ring placed on a smooth horizontal plane. In the same plane a charge +Q has also been fixed as shown. The potential at the point P due to +Q is V. The velocity with which the bead should projected from the point P so that it can complete a circle should be greater than
physics-General
physics-
In space of horizontal EF (E = (mg)/q) exist as shown in figure and a mass m attached at the end of a light rod. If mass m is released from the position shown in figure find the angular velocity of the rod when it passes through the bottom most position
In space of horizontal EF (E = (mg)/q) exist as shown in figure and a mass m attached at the end of a light rod. If mass m is released from the position shown in figure find the angular velocity of the rod when it passes through the bottom most position
physics-General
physics-
A bullet of mass m and charge q is fired towards a solid uniformly charged sphere of radius R and total charge + q. If it strikes the surface of sphere with speed u, find the minimum speed u so that it can penetrate through the sphere. (Neglect all resistance forces or friction acting on bullet except electrostatic forces)
A bullet of mass m and charge q is fired towards a solid uniformly charged sphere of radius R and total charge + q. If it strikes the surface of sphere with speed u, find the minimum speed u so that it can penetrate through the sphere. (Neglect all resistance forces or friction acting on bullet except electrostatic forces)
physics-General
physics-
An infinite number of concentric rings carry a charge Q each alternately positive and negative. Their radii are 1, 2, 4, 8...... meters in geometric progression as shown in the figure. The potential at the centre of the rings will be
An infinite number of concentric rings carry a charge Q each alternately positive and negative. Their radii are 1, 2, 4, 8...... meters in geometric progression as shown in the figure. The potential at the centre of the rings will be
physics-General
