Chemistry-
General
Easy
Question
Which of the following arrangements does not represent the correct order of the property stated against it?
- Sc < Ti < Cr < Mn : number of oxidation states
- V2+ < Cr2+ < Mn2+ < Fe2+ : paramagnetic behaviour
- Ni2+ < Co2+ < Fe2+ < Mn2+ : lonic size
- Co3+ < Fe3+ < Cr3+ < Sc3+ : stability in aqueous solution
The correct answer is: V2+ < Cr2+ < Mn2+ < Fe2+ : paramagnetic behaviour
The unpaired electrons in Fe2+ ion (four) are less than in Mn2+ ion (five)
\Fe2+ ion is less paramagnetic than Mn2+ ion.
The correct order is :
V2+ < Cr2+ < Fe2+ < Mn2+
Related Questions to study
chemistry-
Magnetic moment of Cr (Z = 24), Mn+ (Z = 25) and Fe2+ (Z = 26) are a,b,c. They are in the order:
Magnetic moment of Cr (Z = 24), Mn+ (Z = 25) and Fe2+ (Z = 26) are a,b,c. They are in the order:
chemistry-General
physics
A geo-stationary satellite is orbiting the earth of a height of above the surface of earth, R. being the radius of earth. The time period of another satellite at a height of 2.5R from the surface fo earth is hr
A geo-stationary satellite is orbiting the earth of a height of above the surface of earth, R. being the radius of earth. The time period of another satellite at a height of 2.5R from the surface fo earth is hr
physicsGeneral
Maths-
A point 
is moving with uniform velocity 
along a line AB.'O' is a point on the line perpendicular drawn to AB at A and at a distance ' l' from it. The angular velocity of P about 'O' is
A point is moving with uniform velocity along a line AB.'O' is a point on the line perpendicular drawn to AB at A and at a distance ' l' from it. The angular velocity of P about 'O' is
Maths-General
physics
The distance of a geo-stationary satellite from the center of the earth (Radius R=6400 km ) is nearest to
The distance of a geo-stationary satellite from the center of the earth (Radius R=6400 km ) is nearest to
physicsGeneral
physics
The weight of an astronaut, in an artificial satellite revolving around the earth is
The weight of an astronaut, in an artificial satellite revolving around the earth is
physicsGeneral
physics
Which one of following statements regarding artificial satellite of earth is incorrect,
Which one of following statements regarding artificial satellite of earth is incorrect,
physicsGeneral
Maths-
A stone projected vertically upward moves according to the law 
. The maximum height reached is
A stone projected vertically upward moves according to the law . The maximum height reached is
Maths-General
physics
Two identical satellites are at R and 7R away from each surface, the wrong statement is (R - Radius of earth)
Two identical satellites are at R and 7R away from each surface, the wrong statement is (R - Radius of earth)
physicsGeneral
physics
Orbital velocity of earth’s satellite near the surface is 7kms-1. when the radius of orbit is 4 times that of earth's radius, then orbital velocity in that orbit is....kms-1
Orbital velocity of earth’s satellite near the surface is 7kms-1. when the radius of orbit is 4 times that of earth's radius, then orbital velocity in that orbit is....kms-1
physicsGeneral
Maths-
A student was asked to prove a statement by induction. He proved
i) P(5) is true and
ii) truth of P(n)
truth of P(n+1), 
.
On the basis of this, he could conclude that P(n) is true
A student was asked to prove a statement by induction. He proved
i) P(5) is true and
ii) truth of P(n) truth of P(n+1), .
On the basis of this, he could conclude that P(n) is true
Maths-General
physics
Orbital velocity of an artificial satellite does not depend upon.
Orbital velocity of an artificial satellite does not depend upon.
physicsGeneral
Physics
A satellite is moving around the earth with speed v in a circular orbit of radius .i If the orbit radius is decreasd by 1% its speed will
A satellite is moving around the earth with speed v in a circular orbit of radius .i If the orbit radius is decreasd by 1% its speed will
PhysicsGeneral
biology
Which of the following is used to normalize low level heart beats
Which of the following is used to normalize low level heart beats
biologyGeneral
physics
If the height of a satellite from the earth is negligible in comparison of the radius of the earth R, the orbital velocity of the satellite is……
If the height of a satellite from the earth is negligible in comparison of the radius of the earth R, the orbital velocity of the satellite is……
physicsGeneral
physics
A satellite revolves around the earth in an elliptical orbit. Its speed,
A satellite revolves around the earth in an elliptical orbit. Its speed,
physicsGeneral
