Chemistry-
General
Easy
Question
For Li+2,r2:r5 will be-
- 9:25
- 4:25
- 25:4
- 25:9
The correct answer is: 4:25
Related Questions to study
chemistry-
When the atoms of gold sheet are bombarded with a be am of α-particles, only a few α- particles get deflected where as most of them go straight un deflected. This is because–
When the atoms of gold sheet are bombarded with a be am of α-particles, only a few α- particles get deflected where as most of them go straight un deflected. This is because–
chemistry-General
chemistry-
Mass of neutron is........times the mass of electron -
Mass of neutron is........times the mass of electron -
chemistry-General
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Which has highest e/m ratio–
Which has highest e/m ratio–
chemistry-General
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At room temperature, sodium crystal lises in a body centred cubic cell with a=4.24Å. The the oretical density of sodium is–(Atomic mass of sodium=23.0gmol–1)
At room temperature, sodium crystal lises in a body centred cubic cell with a=4.24Å. The the oretical density of sodium is–(Atomic mass of sodium=23.0gmol–1)
chemistry-General
General
________ is a sudden shaking of the Earth’s crust.
________ is a sudden shaking of the Earth’s crust.
GeneralGeneral
chemistry-
For the structure given below the site marked as S is a :
For the structure given below the site marked as S is a :
chemistry-General
chemistry-
A compound alloy of gold and copper crystallizes in a cube lattice in which the gold atoms occupy the corners of a cube and the copper atoms occupy the centres of each of the cube faces. The formula of this compound is-
A compound alloy of gold and copper crystallizes in a cube lattice in which the gold atoms occupy the corners of a cube and the copper atoms occupy the centres of each of the cube faces. The formula of this compound is-
chemistry-General
chemistry-
What is the simplest formula of a solid whose cubic unit cell has the atom A ateach corner, the atom Bat each face centre and a Catom at the body centre-
What is the simplest formula of a solid whose cubic unit cell has the atom A ateach corner, the atom Bat each face centre and a Catom at the body centre-
chemistry-General
physics-
An equiconvex lens is cut into two halves along (i) XOX¢ and (ii) YOY¢ as shown in the figure. Let f, f ¢, f ¢¢ be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively
Choose the correct statement from the following
An equiconvex lens is cut into two halves along (i) XOX¢ and (ii) YOY¢ as shown in the figure. Let f, f ¢, f ¢¢ be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively
Choose the correct statement from the following
physics-General
physics-
A point object O is placed in front of a glass rod having spherical end of radius of curvature 30 cm. The image would be formed at
A point object O is placed in front of a glass rod having spherical end of radius of curvature 30 cm. The image would be formed at
physics-General
physics-
A convex lens is made up of three different materials as shown in the figure. For a point object placed on its axis, the number of images formed are
A convex lens is made up of three different materials as shown in the figure. For a point object placed on its axis, the number of images formed are
physics-General
chemistry-
In FCC crystal, which of the following shaded planes contains the following type of arrangement of atoms
In FCC crystal, which of the following shaded planes contains the following type of arrangement of atoms
chemistry-General
chemistry-
Assertion: The value of Vander Waal constant a is higher for NH3 than for N2.
Reason: Hydrogen bonding is present in ammonia.
Assertion: The value of Vander Waal constant a is higher for NH3 than for N2.
Reason: Hydrogen bonding is present in ammonia.
chemistry-General
chemistry-
If 10-4 dm-3 of water is introduced into a1.0 dm-3 flask at 300K,how many moles of water are in the vapour phase when equilibrium is established? (Given : Vapour pressure of H2O at300 is3170pa;R=8.314JK 1mol)
If 10-4 dm-3 of water is introduced into a1.0 dm-3 flask at 300K,how many moles of water are in the vapour phase when equilibrium is established? (Given : Vapour pressure of H2O at300 is3170pa;R=8.314JK 1mol)
chemistry-General
chemistry-
Under identical conditions of temperature and pressure the ratio of the rates of effision of O2 and CO2 gases is given by–
Under identical conditions of temperature and pressure the ratio of the rates of effision of O2 and CO2 gases is given by–
chemistry-General
