Chemistry-
Which will not form a yellow precipitate on heating with an alkaline solution of iodine?
Chemistry-General
Answer:The correct answer is:
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chemistry-
The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is
The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is
chemistry-General
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A bi-convex lens is formed with two thin planoconvex lenses as shown in the figure Refractive index n of the first lens is 1.5 and that of the second lens s 1.2 Both the curved surfaces are of the same radius of curvature R = 14 cm For this bi-convex lens, for an object distance of 40 cm, the image distance will be
A bi-convex lens is formed with two thin planoconvex lenses as shown in the figure Refractive index n of the first lens is 1.5 and that of the second lens s 1.2 Both the curved surfaces are of the same radius of curvature R = 14 cm For this bi-convex lens, for an object distance of 40 cm, the image distance will be
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The graph between the lateral magnification (m) produced by a lens and the distance of the image (v) is given by
The graph between the lateral magnification (m) produced by a lens and the distance of the image (v) is given by
physics-General
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A small sphere is attached to a cord and rotates in a vertical circle about a point 
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as tension in the string at this point is maximum
as tension in the string at this point is maximumA small sphere is attached to a cord and rotates in a vertical circle about a point . If the average speed of the sphere is increased, the cord is most likely to break at the orientation when the mass is at
physics-General
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Two forces, each equal to 
, act as shown in figure. Their resultant is
Note that the angle between two forces is 120
and not 60.
or
or
and not 60.or
or
Two forces, each equal to , act as shown in figure. Their resultant is
physics-General
Note that the angle between two forces is 120 and not 60.
or
or
and not 60.or
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chemistry-
The reaction given below is called: 
It is name reaction.
The reaction given below is called:
chemistry-General
It is name reaction.
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- butyl alcohol 
A True statement about is
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A point object O is placed at a distance of 0.3 m from a convex lens of focal length 0.2m It is then cut into two halves each of which is displaced by 0.0005 m as shown in figure
Image will be formed from the lens at a distance of
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Image will be formed from the lens at a distance of
physics-General
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A point object O is placed at a distance of 0.3 m from a convex lens of focal length 0.2m It is then cut into two halves each of which is displaced by 0.0005 m as shown in figure
Number of images found is
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Number of images found is
physics-General
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A point object O is placed at a distance of 0.3 m from a convex lens of focal length 0.2m It is then cut into two halves each of which is displaced by 0.0005 m as shown in figure
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Separation between the images is
physics-General
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General formula of primary alcohol is:
General formula of primary alcohol is:
chemistry-General
physics-
The convex surface of a thin concav–convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm The concave surface has a radius of curvature of 60 cm The convex side is silvered and placed on a horizontal surface as shown in the figure The focal length of the combination has the magnitude
The convex surface of a thin concav–convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm The concave surface has a radius of curvature of 60 cm The convex side is silvered and placed on a horizontal surface as shown in the figure The focal length of the combination has the magnitude
physics-General
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physics-General
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The convex surface of a thin concav–convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm The concave surface has a radius of curvature of 60 cm The convex side is silvered and placed on a horizontal surface as shown in the figure A small object is placed on the principal axis of the combination, at a distance of 30 cm in front of the mirror The magnification of the image is
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physics-General
maths-
If 
, then 
.If , then
maths-General
.