Question 2 :
Which of the following statement is incorrect for formation of sodium chloride?
Question 4 :
During the formation of the ionic bond, electron transfer takes place from one atom to the others.
Question 5 :
Which metal(s) can be used to produce electrons b the photoelectric effect from given source of light?
Question 9 :
Sharing of valence electrons between two atoms generally takes place between ______ atoms.
Question 11 :
The valency of an atom is equal to its combining capacity.<br/>
Question 14 :
Coulomb's law is used to calculate the energy of an ion pair.
Question 16 :
In CaF$_2$, the number of electron(s) transferred from calcium to fluorine atoms are_____.
Question 17 :
The bonds present in $\left( { N }_{ 2 }{ O }_{ 5 } \right) $ are:<br/>
Question 19 :
Which of the following molecule can show Lewis acidity ?<br>(I) $CO_{2}$<br>(II) $Br_{2}$<br>(III) $SnCl_{2}$<br>(IV) $HF$<br>(V) $NMe_{3}$
Question 21 :
Which of the following reaction takes place during formation of ionic bond?
Question 22 :
The order of covalent character of $KF, KI, KCl$ is :
Question 24 :
Magnesium reacts with an element $(X)$ to form an ionic compound. If the ground state electronic configuration of $(X)$ is $1s^{2} 2s^{2} 2p^{3}$, the simplest formula for this compound is :
Question 25 :
Assertion: In trigonal bipyramidal structure two axial bonds are longer than the equitorial bonds.
Reason: Axial bonds suffer more repulsion as compared to equitorial bonds.
Question 26 :
Which of the following in inevitable in a chemical bond formation?
Question 27 :
Assertion: Ionic bonds are directional in nature whereas covalent bonds are non-directional.
Reason: According to orbital overlap concept, the formation of a covalent bond between two atoms results by pairing of electrons present in the valence shell having same spins.
Question 28 :
What is the formal charge on the chlorine atom in the oxyacid $HOClO_2$ if it contains single bonds ?
Question 29 :
$MgO$ has a high melting point because due to the highly charged ions, ionic force is strong and lattice energy is........<br/>