Chemistry-
General
Easy
Question
Aqueous solution of 
gives test for both 
and 
but after addition of excess of KCN, solution ceases to give test for . This is due to the formation of
- the double salt
- the complex ion
- the complex ion
The correct answer is: the complex ion
Related Questions to study
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A light ray I is incident on a plane mirror M. The mirror is rotated in the direction as shown in the figure by an arrow at frequency 
rps. The light reflected by the mirror is received on the wall W at a distance 10 m from the axis of rotation. When the angle of incidence becomes 
the speed of the spot (a point) on the wall is:
A light ray I is incident on a plane mirror M. The mirror is rotated in the direction as shown in the figure by an arrow at frequency rps. The light reflected by the mirror is received on the wall W at a distance 10 m from the axis of rotation. When the angle of incidence becomes the speed of the spot (a point) on the wall is:
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A plano concave lens is placed on a paper on which a flower is drawn. How far above its actual position does the flower appear to be?
A plano concave lens is placed on a paper on which a flower is drawn. How far above its actual position does the flower appear to be?
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The figure shows a parallel slab of refractive index 
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and 
. Light is incident on the slab at angle of incidence 
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if incidence is from ' ' and it is ' 
' if the incidence is from ' '. Then assuming that 
and 
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.
The figure shows a parallel slab of refractive index which is surrounded by media of refractive indices and . Light is incident on the slab at angle of incidence . The time taken by the ray to cross the slab is ' if incidence is from ' ' and it is ' ' if the incidence is from ' '. Then assuming that and , then value of .
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Two blocks each of mass m lie on a smooth table. They are attached to two other masses as shown in the figure. The pulleys and strings are light. An object O is kept at rest on the table. The sides AB & CD of the two blocks are made reflecting. The acceleration of two images formed in those two reflecting surfaces w.r.t. each other is:
Two blocks each of mass m lie on a smooth table. They are attached to two other masses as shown in the figure. The pulleys and strings are light. An object O is kept at rest on the table. The sides AB & CD of the two blocks are made reflecting. The acceleration of two images formed in those two reflecting surfaces w.r.t. each other is:
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In the figure shown, the image of a real object O is formed at point I. AB is the principal axis of the mirror. The mirror must be:
In the figure shown, the image of a real object O is formed at point I. AB is the principal axis of the mirror. The mirror must be:
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A transparent cylinder has its right half polished so as to act as a mirror. A paraxial light ray is incident from left, that is parallel to principal axis, exits parallel to the incident ray as shown in the figure. The refractive index n of the material of the cylinder is :
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Which of the following statements are true (or) false -
i) 
and 
are coordination isomers
ii) 
and 
are ionisation isomers
iii) 
and 
are linkage isomers
iv) cis platin exhibits geometrical isomerism
Which of the following statements are true (or) false -
i) and are coordination isomers
ii) and are ionisation isomers
iii) and are linkage isomers
iv) cis platin exhibits geometrical isomerism
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As shown in the figure the observer 'O' sees the distance AB as infinitely large. If refractive index of liquid is m1 and that of glass is 
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In the figure ABC is the cross section of a right angled prism and ACDE is the cross section of a glass slab. The value of 
so that light incident normally on the face AB does not cross the face AC is (given 
)
In the figure ABC is the cross section of a right angled prism and ACDE is the cross section of a glass slab. The value of so that light incident normally on the face AB does not cross the face AC is (given )
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A man starting from point P crosses a 4 km wide lagoon and reaches point Q in the shortest possible time by the path shown in the figure. If the person swims at a speed of 3 km/hr and walks at a speed of 4 km/hr, then his time of journey is (µsaltwater = 4/3) :
A man starting from point P crosses a 4 km wide lagoon and reaches point Q in the shortest possible time by the path shown in the figure. If the person swims at a speed of 3 km/hr and walks at a speed of 4 km/hr, then his time of journey is (µsaltwater = 4/3) :
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The following figure represents a wave front AB which passes from air to another transparent medium and produces a new wave front CD after refraction. The refractive index of the medium is (PQ is the boundary between air and the medium).
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Two plane mirrors are joined together as shown in the figure. Two point objects 
and 
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Two plane mirrors are joined together as shown in the figure. Two point objects and are placed symmetrically such that . The image of the two objects is common if :
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An object and a plane mirror are shown in figure. Mirror is moved with velocity V as shown. The velocity of image is :
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In the figure shown a person AB of height 170 cm is standing infront of a plane mirror. His eyes are at height 164 cm. At what distance from P should a hole be made in the mirror so that he cannot see the top of his head.
In the figure shown a person AB of height 170 cm is standing infront of a plane mirror. His eyes are at height 164 cm. At what distance from P should a hole be made in the mirror so that he cannot see the top of his head.
physics-General
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A small object is placed 50 cm to the left of a thin convex lens of focal length 30 cm. A convex spherical mirror of radius of curvature 100 cm is placed to the right of the lens at a distance of 50 cm. The mirror is tilted such that the axis of the mirror is at an angle 
to the axis of the lens, as shown in the figure.
If the origin of the coordinate system is taken to be at the centre of the lens, the coordinates (in cm) of the point (x,y) at which the image is formed are
A small object is placed 50 cm to the left of a thin convex lens of focal length 30 cm. A convex spherical mirror of radius of curvature 100 cm is placed to the right of the lens at a distance of 50 cm. The mirror is tilted such that the axis of the mirror is at an angle to the axis of the lens, as shown in the figure.
If the origin of the coordinate system is taken to be at the centre of the lens, the coordinates (in cm) of the point (x,y) at which the image is formed are
physics-General
