Question 4 :
Which of the following has different hybridisation from other three species :-
Question 10 : <p>Some atoms attain their inert gas configuration by sharing of electrons. This method of attaining inert gas configuration is known as :</p>
Question 14 :
Atoms or group of atoms which are electrically charged are known as:
Question 15 : Oxygen and sulphur both are the member of same group in Periodic Table but <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c8e5399925718ac6ab8b"> is liquid while <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c92a6f3020298ca1378a"> is gas because
Question 17 :
The bond formed between the two atoms by mutual sharing of electrons so as to complete their octets or duplets gives :<br/>
Question 20 : The bond order of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c8e9c2a2ae2953d94236"> molecule on the basis of molecular orbital theory is:
Question 21 :
The number of electron pair shared between two atoms of same or different elements during its formation of molecules is known as :
Question 24 :
The structure of glycine (amino acid) is $H_{2}N-CH_{2}COO^{-}$ ($z$ witter ion). Select the correct statement:-
Question 26 :
In a crystal, the atoms are located at the positions of:
Question 30 :
The value of bond order in nitrogen and oxygen molecule is:
Question 31 : Formal charge at oxygen atom I, II and III<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ef6d7d9180da34ba6ee438f"><br>
Question 33 :
During the formation of ionic bond ________transfer takes place from one atom to the others.
Question 34 : <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c8e5399925718ac6ab8b"> boils at higher temperature than <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c92a6f3020298ca1378a"> because it is capable of forming:
Question 35 :
Magnetic nature of {tex} \mathrm { C } _ { 2 } {/tex} molecule will be:-
Question 37 :
What are the conditions for a species to act as a donor and an acceptor during dative bond formation?
Question 38 : One would expect the elemental form of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c942ab3481716f4b70f9"> at room temperature to be:
Question 40 :
Which of the following commonly forms ionic compounds as a $-1$ anion?
Question 46 : Among <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c966c2a2ae2953d94346"> , the <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c9666f3020298ca137f7"> has highest melting point because:
Question 47 :
Assertion: Ionic compounds are bad conductors of electricity.
Reason: In ionic compounds mobile ions exists.
Question 48 :
Which of the following compounds has dipole moment approximately equal to that of chlorobenzene?
Question 50 : The covalent compound <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c902c2a2ae2953d94276"> has the polar character because:
Question 52 :
Two elements X and Y have the following electronic configurations $X=1s^{2}2s^{2} 2p^{6} 3s^{2} 3p^{6}4s^{2}$ and $Y=1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}$. The formula of the compound formed by the combination of X and Y is :<br/>
Question 54 :
Calcium oxide is formed as a result of transfer of _____ valence electrons.
Question 55 :
Two elements $X$ and $Y$ combine to form a compound $XY$. Under what conditions the bond formed between them will be ionic?
Question 58 :
A number of ionic compounds, e.g $AgCl,Ca{F}_{2},Ba{SO}_{4}$ are insoluble in water. This is because:
Question 60 :
The first ionisation potential of $Na$ is $5.1eV$. The value of electron gain enthalpy of ${Na}^{+}$ will be :
Question 61 :
Which ionic compound has the largest amount of lattice energy ?
Question 62 :
A highly ionic compound is formed by the combination of elements belonging to:
Question 64 :
Elements $A, B$ and $C$ have respectively $1,3$ and $5$ electrons in valence shell. Ionic compound is not formed from :
Question 65 :
Assertion: Ionic compounds are bad conductors of electricity.
Reason: In ionic compounds mobile ions exists.
Question 67 :
The electronic structure of four element a, b, c and d are<br/>(i) $1s^2$<br/>(ii) $1s^2,\,2s^2$<br/>(iii) $1s^2,\,2s^2\,2p^5$<br/>(iv) $1s^2,\,2s^2\,2p^6$<br/>The tendency to form bond is greatest in:<br/>
Question 68 :
Some of the following properties are important in determining whether an element has metallic properties<br>I : atomic number<br>II : atomic weight<br>III : number of valence electrons<br>IV : number of vacant atomic orbitals<br>V : total number of electronic shells in the atom<br>Select correct properties from the codes given below
Question 69 :
Sodium forms ${Na}^{+}$ ion but it doesnot form ${Na}^{2+}$ because of
Question 70 :
$HCl$ gas is covalent and $NaCl$ is an ionic compound. This is because:
Question 72 :
Which element do not have valency equals to its group number?
Question 77 :
Consider the given organometallic compound.<br>(I)$(CH_{3})_{2}\ Hg$ (II) $(CH_{3})_{2}\ Zn $ (III)$(CH_{3})_{2}\ Mg$ (IV)$CH_{3}Li$<br>The correct decreasing order of ionic character is :<br>
Question 80 : Identify the correct statement from below, concerning the structure of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c95a6f3020298ca137d7">
Question 85 : A number of ionic compounds, e.g., <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c968c2a2ae2953d9434a"> are insoluble in water. This is because:
Question 89 :
Among the following mixtures, dipole dipole as the major interaction, is present in
Question 90 : As the <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c8dd399925718ac6ab76"> -character of hybridization orbitals increases, the bond angle:
Question 91 : Some of the properties of the two species, <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c95b6f3020298ca137da"> and <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7c9036f3020298ca1372a"> are described below. Which one of them is correct?
Question 96 :
The pair of species that has the same bond order in the followng is
Question 98 :
Which of the following pairs of ions is isoelectronic and isostructural?
Question 99 :
Amongst {tex}\mathrm {LiCl,\ RbCl, \ BeCl_2} {/tex} and {tex}\mathrm {MgCl} _2{/tex}, the compounds with the greatest and the least ionic character, respectively are:
Question 100 :
Which of the following molecule possesses polar and nonpolar covalent bond ?
Question 102 :
Assertion: Sodium chloride ($NaCl$) is a stable ionic solid.
Reason: $NaCl$ has high lattice enthalpy.
Question 104 :
The conductivity of the metal decreases with increase in temperature because
Question 106 :
Which of the following is not a property of an ionic compound?
Question 109 :
The ratio of number of lone pairs in $NH_3$, $H_2O$ and $XeF_{2}$ is :
Question 110 :
Which of the following family form negative ions in an ionic bond?
Question 113 :
Solubility of $NaCl$, $Na_2SO_4$ and $Na_3PO_4$ in water in increasing order is :
Question 114 :
Dipole moment of {tex} \mathrm { H } _ { 2 } \mathrm { O } {/tex} is {tex} 1.85 \mathrm { D } {/tex}. If the bond angle is {tex} 105 ^ { \circ } {/tex} and {tex} \mathrm { O } - \mathrm { H } {/tex} bond length is {tex} 0.94 {\text{Å}}{/tex}, what is the magnitude of charge on the oxygen atom in water molecule?
Question 115 :
The element X reacting with chlorine forms a water soluble compound having high melting point. Element X is:
Question 118 :
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 119 :
In which of the following pairs, the two species are isostructural?
Question 121 :
Which of the following sets of characteristics leads to the increase in solubility of ionic substances?
Question 122 :
Which of the following methods is used for measuring bond length?
Question 123 :
$KF$ combines with $HF$ to form $KHF_2$. The compound contains the species:
Question 124 :
The bond dissociation energy of {tex} \mathrm { B } - \mathrm { F } {/tex} in {tex} \mathrm { BF } _ { 1 } {/tex} is {tex} 646 \mathrm { kJ } \mathrm { mol } ^ { - 1 } {/tex} whereas that of {tex} \mathrm { C } - \mathrm { F } {/tex} in {tex} \mathrm { CF } _ { 4 } {/tex} is {tex} 515 {/tex} {tex} \mathrm { kJ } \mathrm { mol } ^ { - 1 } . {/tex} The correct reason for higher {tex} \mathrm { B } - \mathrm { F } {/tex} bond dissociation energy as compared to that of {tex} \mathrm { C } - \mathrm { F } {/tex} is
Question 125 :
The bond dissociation energy of {tex} \mathrm { B } - \mathrm { F } {/tex} in {tex} \mathrm { BF } _ { 3 } {/tex} is {tex} 646 \mathrm { kJ } \mathrm {\ mol } ^ { - 1 } {/tex} whereas that of {tex} \mathrm { C } - \mathrm { F } {/tex} in {tex} \mathrm { CF } _ { 4 } {/tex} is {tex} 515 \mathrm { kJ } \mathrm { \ mol } ^ { - 1 } . {/tex} The correct reason for higher {tex} \mathrm { B } - \mathrm { F } {/tex} bond dissociation energy as compared to that of {tex} \mathrm { C } - \mathrm { F } {/tex} is
Question 126 :
Molecular {tex} \mathrm { AB } {/tex} has a bond length of {tex}1.61 \ {\text{Å}}{/tex} and a dipole moment of {tex}0.38 \mathrm D{/tex}. The fractional charge on each atom (absolute magnitude) is: {tex} ( \mathrm { e } _ { 0 } = 4.802 \times 10 ^ { - 10 } \text { esu) } \quad {/tex}
Question 127 :
The dipole moments of diatomic molecules AB and CD are {tex} 10.41 \mathrm { D } {/tex} and {tex} 10.27 \mathrm { D } {/tex}, respectively while their bond distances are {tex}2.82{/tex} and {tex} 2.67 \mathrm {\text{Å}} {/tex}, respectively. This indicates that
Question 128 :
{tex} _ { 1 } \mathrm { H } ^ { 2 } + _ { 1 } \mathrm { H } ^ { 2 } \longrightarrow _ { 2 } \mathrm { He } ^ { 3 } + _ { 0 } \mathrm { n } ^ { 1 } {/tex}<br>The above nuclear reaction is called<br>
Question 130 :
{tex} \mathrm { CaO } {/tex} and {tex} \mathrm { NaCl } {/tex} have the same crystal structure and approximately the same ionic radii. If {tex}\mathrm U {/tex} is the lattice energy of {tex} \mathrm { NaCl } {/tex}, the approximate lattice energy of {tex} \mathrm { CaO } {/tex} is
Question 131 :
Which of the following is/are misconception(s) associated with resonance?<br>(i) The molecule exists for a certain fraction of time in one cannonical form and for other fractions of time in other cannonical forms. <br>(ii) The cannonical forms have no real existence. <br>(iii) There is no such equilibrium between the cannonical forms.<br>
Question 133 :
Which of the following statements is correct in the context of the allene molecule, {tex} \mathrm {C_3H_4} {/tex}?
Question 134 :
Amongst $LiCl$, $ BeCl_2,\ MgCl_2 $ and $RbCl$ the compounds with greatest and least ionic character, respectively are:
Question 137 :
In an ionic compound $A^+$ $X^-$ the degree of covalent bonding is greatest when :
Question 138 :
Ionic solids do not conduct electricity, but will when the temperature is raised above the melting point. Which of the following explains why this is possible?
