Chemistry-
General
Easy
Question
The cations and anions formed as a result of electron transfer are drawn towards each other due to the electrostatic force (coulomb force) of attraction. They form an ionic bond or an electrovalent bond. The bond between two elements is ionic if the EN difference between them is greater than 1.7. The number of electrons transferred during an ionic bond formation is known as an electrovalency. Compounds containing ionic bonds are called ionic compounds. Examples of ionic compounds are NaCl(Na+Cl–), CaO(Ca2+O2–), MgO(Mg2+O2–) and MgCl2 
.
Element X is strongly electropositive and the element Y is strongly electronegative. Both are univalent. The compound formed would be:
- X+ Y–
- X– Y+
- X– Y
- X2Y
The correct answer is: X+ Y–
Related Questions to study
Chemistry-
An aqueous solution of a salt Compound A is :
A)gives a white precipitate
B)with sodium chloride solution The filtrate gives a black precipitate
C)when H2S is passed into it Compound (B) dissolves in hot water and the solution gives a yellow precipitate
D)on treatment with sodium iodide The compound (A) does not give any gas with dilute HCl but liberates a reddish brown gas on heating Identify the compounds (A) to (D)
An aqueous solution of a salt Compound A is :
A)gives a white precipitate
B)with sodium chloride solution The filtrate gives a black precipitate
C)when H2S is passed into it Compound (B) dissolves in hot water and the solution gives a yellow precipitate
D)on treatment with sodium iodide The compound (A) does not give any gas with dilute HCl but liberates a reddish brown gas on heating Identify the compounds (A) to (D)
Chemistry-General
Physics-
Two pure inductors each of self inductance L are connected in parallel but are well separated from each other. The total inductance is
Two pure inductors each of self inductance L are connected in parallel but are well separated from each other. The total inductance is
Physics-General
Physics-
In the following circuit, the bulb will become suddenly bright if
In the following circuit, the bulb will become suddenly bright if
Physics-General
Physics-
Two coils of self inductance 
and 
are placed closer to each other so that total flux in one coil is completely linked with other. If 
is mutual inductance between them, then
Two coils of self inductance and are placed closer to each other so that total flux in one coil is completely linked with other. If is mutual inductance between them, then
Physics-General
Physics-
One conducting U tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube moves towards the other at a constant sped v then the emf induced in the circuit in terms of B, l and v where l is the width of each tube, will be
One conducting U tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube moves towards the other at a constant sped v then the emf induced in the circuit in terms of B, l and v where l is the width of each tube, will be
Physics-General
Physics-
A horizontal straight conductor kept in north-south direction falls under gravity, then
A horizontal straight conductor kept in north-south direction falls under gravity, then
Physics-General
Physics-
A conducting square loop of side l and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane at the loop exists everywhere with half the loop outside the field, as shown in figure. The induced e.m.f. is
A conducting square loop of side l and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane at the loop exists everywhere with half the loop outside the field, as shown in figure. The induced e.m.f. is
Physics-General
Physics-
The current carrying wire and the rod AB are in the same plane. The rod moves parallel to the wire with a velocity v. Which one of the following statements is true about induced emf in the rod
The current carrying wire and the rod AB are in the same plane. The rod moves parallel to the wire with a velocity v. Which one of the following statements is true about induced emf in the rod
Physics-General
Physics-
A conducting wire is moving towards right in a magnetic field B. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be
A conducting wire is moving towards right in a magnetic field B. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be
Physics-General
Physics-
A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere. The current induced in the loop is
A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere. The current induced in the loop is
Physics-General
Physics-
An electric potential difference will be induced between the ends of the conductor shown in the diagram, when the conductor moves in the direction
An electric potential difference will be induced between the ends of the conductor shown in the diagram, when the conductor moves in the direction
Physics-General
Physics-
A rectangular coil ABCD is rotated anticlockwise with a uniform angular velocity about the axis shown in diagram below. The axis of rotation of the coil as well as the magnetic field B are horizontal. The induced e.m.f. in the coil would be maximum when z
A rectangular coil ABCD is rotated anticlockwise with a uniform angular velocity about the axis shown in diagram below. The axis of rotation of the coil as well as the magnetic field B are horizontal. The induced e.m.f. in the coil would be maximum when z
Physics-General
Physics-
The diagram below shows two coils A and B placed parallel to each other at a very small distance. Coil A is connected to an ac supply. G is a very sensitive galvanometer. When the key is closed
The diagram below shows two coils A and B placed parallel to each other at a very small distance. Coil A is connected to an ac supply. G is a very sensitive galvanometer. When the key is closed
Physics-General
Physics-
A magnet NS is suspended from a spring and while it oscillates, the magnet moves in and out of the coil C. The coil is connected to a galvanometer G. Then as the magnet oscillates,
A magnet NS is suspended from a spring and while it oscillates, the magnet moves in and out of the coil C. The coil is connected to a galvanometer G. Then as the magnet oscillates,
Physics-General
Physics-
The magnetic flux linked with a circuit of resistance 100 ohm increases from 10 to 60 webers. The amount of induced charge that flows in the circuit is (in coulomb)
The magnetic flux linked with a circuit of resistance 100 ohm increases from 10 to 60 webers. The amount of induced charge that flows in the circuit is (in coulomb)
Physics-General
