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The linear structure is not assumed by
1. ${\mathrm{SnCl}}_2$
2. ${\mathrm{NCO}}^{-}$
3. ${\mathrm{NO}}^{+}$
4. ${\mathrm{NO}}_2^{+}$

Which of the following does not conduct electricity in the fused state?
1. ${\mathrm{BeCl}}_2$
2. ${\mathrm{MgCl}}_2$
3. ${\mathrm{SrCl}}_2$
4. ${\mathrm{BaCl}}_2$ 

Which of the following hydrides is not ionic?
 
1. ${\mathrm{CaH}}_2$
2. ${\mathrm{BaH}}_2$
3. ${\mathrm{SrH}}_2$
4. ${\mathrm{BeH}}_2$

${\mathrm{CO}}_3^{2-}$anion does not has which of the following characteristics
1. Bonds of unequal length                               
2. sp² hybridization  of c atom
3. Resonance stabilization                                   
4. Same bond angles

Which of the following process is not associated with change of hybridization of the underlined compound
1. $\underline{\mathrm{Al}}{\left(\mathrm{OH}\right)}_3$ ppt. dissolved in NaOH
2. ${\underline{\mathrm{B}}}_2{\mathrm{H}}_6$ is dissolved in THF
3. $\underline{\mathrm{Si}}{\mathrm{F}}_4$ vapour is passed through liq. HF
4. Solidification of $\underline{\mathrm{P}}{\mathrm{Cl}}_5$ vapour
 

Which of the following statements are not correct
1. All C – O bonds in  ${\mathrm{CO}}_3^{2-}$ are equal but not in ${\mathrm{H}}_2{\mathrm{CO}}_3$
2. All C – O bonds in ${\mathrm{HCO}}_2^{-}$ are equal but not in ${\mathrm{HCO}}_2\mathrm{H}$
3. C – O bond length in ${\mathrm{HCO}}_2^{-}$ is longer than C – O bond length in ${\mathrm{CO}}_3^{2-}$
4. C – O bond length in ${\mathrm{HCO}}_2^{-}$ and C – O bond length in ${\mathrm{CO}}_3^{2-}$ are different

The electronic configuration of four elements L, P, Q and R are given in brackets 
$\mathrm{L}\left(1{\mathrm{s}}^2,2{\mathrm{s}}^2,2{\mathrm{p}}^4\right) ; \mathrm{Q}\left(1{\mathrm{s}}^2,2{\mathrm{s}}^{2}2{\mathrm{p}}^6,3{\mathrm{s}}^{2}3{\mathrm{p}}^5\right)$
$\mathrm{P} \left(1{\mathrm{s}}^2,2{\mathrm{s}}^{2}2{\mathrm{p}}^6,3{\mathrm{s}}^1\right) ; \mathrm{R}\left(1{\mathrm{s}}^2,2{\mathrm{s}}^{2}2{\mathrm{p}}^6,3{\mathrm{s}}^2\right)$
The formulae of ionic compounds that can be formed between these elements are        
1. ${\mathrm{L}}_2\mathrm{P},\mathrm{RL},\mathrm{PQ} \mathrm{and} {\mathrm{R}}_2\mathrm{Q}$
2. LP, RL, PQ and RQ
3. ${\mathrm{P}}_2\mathrm{L},\mathrm{RL},\mathrm{PQ} \mathrm{and} {\mathrm{RQ}}_2$
4. $\mathrm{LP},{\mathrm{R}}_2\mathrm{L},{\mathrm{P}}_2\mathrm{Q} \mathrm{and} \mathrm{RQ}$

Lattice energy of an ionic compound depends upon
1. Charge on the ion only
2. Size of the ion only
3. Packing of ions only 
4. Charge on the ion and size of the ion

Many ionic crystals dissolve in water because
1. Water is an amphiprotic solvent
2. Water is a high boiling liquid
3. The process is accompanied by a positive heat of solution
4. Water decreases the interionic attraction in the crystal
lattice due to salvation

Favourable conditions for electrovalency are
1. Low charge on ions, large cation, small anion
2. High charge on ions, small cation, large anion
3. High charge on ions, large cation, small anion
4. Low charge on ions, small cation, large anion

Chemical formula for calcium pyrophosphate is ${\mathrm{Ca}}_2{\mathrm{P}}_2{\mathrm{O}}_7$.The formula for ferric pyrophosphate will be    
1. ${\mathrm{Fe}}_3{\left({\mathrm{P}}_2{\mathrm{O}}_7\right)}_3$
2. ${\mathrm{Fe}}_4{\mathrm{P}}_4{\mathrm{O}}_{14}$
3. ${\mathrm{Fe}}_4{\left({\mathrm{P}}_2{\mathrm{O}}_7\right)}_3$
4. ${\mathrm{Fe}}_3{\mathrm{PO}}_4$

Which of the following has highest melting point?
1. ${\mathrm{BeCl}}_2$
2. ${\mathrm{MgCl}}_2$
3. ${\mathrm{CaCl}}_2$
4. ${\mathrm{BaCl}}_2$

The correct sequence of increasing covalent character is represented by:
1. $\mathrm{LiCl}<\mathrm{NaCl}<{\mathrm{BeCl}}_2$
2. ${\mathrm{BeCl}}_2<\mathrm{NaCl}<\mathrm{LiCl}$
3. $\mathrm{NaCl}<\mathrm{LiCl}<{\mathrm{BeCl}}_2$
4. ${\mathrm{BeCl}}_2<\mathrm{LiCl}<\mathrm{NaCl}$

Which is the correct electron dot structure of ${\mathrm{the\; N}}_2\mathrm{O }$molecule?
1. $\mathbf{:}\mathrm{N}=\mathrm{N}=\underset{..}{\overset{..}{\mathrm{O}}}$
2. $\mathbf{:}\mathrm{N}\equiv {\mathrm{N}}^{+}-\underset{..}{\overset{..}{\mathrm{O}}}{\mathbf{:}}^{\mathbf{-}}$
3. $\underset{..}{\overset{\mathbf{.}\mathbf{.}}{\mathrm{N}}}=\stackrel{..}{\mathrm{N}}=\underset{..}{\overset{..}{\mathrm{O}}}$
4. $\mathbf{:}\mathrm{N}=\mathrm{N}=\underset{..}{\overset{..}{\mathrm{O}}}\mathbf{:}$

The correct order of the O–O bond length in ${\mathrm{O}}_2,{\mathrm{H}}_2{\mathrm{O}}_2 \mathrm{and} {\mathrm{O}}_3$ is :
1. ${\mathrm{O}}_2>{\mathrm{O}}_3>{\mathrm{H}}_2{\mathrm{O}}_2$
2. ${\mathrm{O}}_3>{\mathrm{H}}_2{\mathrm{O}}_2>{\mathrm{O}}_2$
3. ${\mathrm{H}}_2{\mathrm{O}}_2>{\mathrm{O}}_3>{\mathrm{O}}_2$
4. ${\mathrm{H}}_2{\mathrm{O}}_2>{\mathrm{O}}_2>{\mathrm{O}}_3$

According to Fajjan's rule, covalent bond is favoured by :-
1. large cation and small anion 
2. large cation and large anion
3. Small cation and large anion 
4. Small cation and small anion

Resonance hybrid of nitrate ion is :-

Nodal planes of $\mathrm{\pi }$ bonds in benzene are located in :
1. all are in molecular plane
2. one in molecular plane and two in plane perpendicular to molecular plane which contain C – C  $\mathrm{\sigma }$ bonds.
3. two in molecular plane and one in plane perpendicular to molecular plane which contain C – C  $\mathrm{\sigma }$ bond and C – H $\mathrm{\sigma }$bond
4. perpendicular to molecular plane which bisect benzene ring in two equal half

Which of the following has fractional bond order ?
1. ${\mathrm{O}}_2^{2+}$
2. ${\mathrm{O}}_2^{2-}$
3. ${\mathrm{F}}_2^{2-}$
4. ${\mathrm{H}}_2^{-}$

Which of the following option with respect to increasing bond order is correct ?
1. $\mathrm{NO}<{\mathrm{C}}_2<{\mathrm{O}}_2^{-}<{\mathrm{He}}_2^{+}$
2. ${\mathrm{C}}_2<\mathrm{NO}<{\mathrm{He}}_2^{+}<{\mathrm{O}}_2^{-}$
3. ${\mathrm{He}}_2^{+}<{\mathrm{O}}_2^{-}<\mathrm{NO}<{\mathrm{C}}_2$
4. ${\mathrm{He}}_2^{+}<{\mathrm{O}}_2^{-}<{\mathrm{C}}_2<\mathrm{NO}$

CaO and NaCl have the same crystal structure and approximately the same ionic radii. If U is the lattice energy of NaCl, the approximate lattice energy of CaO is :-
1. U/2 
2. U 
3. 2 U 
4. 4 U

Which of the following solid sold have highest value of K_p when heated in closed vessel :-
1. Li₂CO₃ (s)                           
2. BeCO₃ (s)             
3. Na₂CO₃ (s)           
4. BaCO₃ (s)

Type of bonds between calcium and carbon in CaC₂ are :-
1. $\mathrm{\sigma },\mathrm{\pi }$
2. only $\mathrm{\sigma }$
3. only $\mathrm{\pi }$
4. ionic bond

The correct order of increasing X – O – X bond angle is (X = H, F or Cl) :-
1. H₂O > Cl₂O > F₂O 
2. Cl₂O > H₂O > F₂O
3. F₂O > Cl₂O > H₂O 
4. F₂O > H₂O > Cl₂O

Nodal planes of $\mathrm{\pi }$-bonds (s) in CH₂ = C = C = CH₂ are located in :
1. all are in molecular plane
2. two in molecular plane and one in a plane perpendicular to molecular plane which contains
C – C $\mathrm{\sigma }$-bond
3. one in molecular plane and two in a plane perpendicular to molecular plane which contains
C – C $\mathrm{\sigma }$-bonds
4. two in molecular plane and one in a plane perpendicular to molecular plane which bisects C – C
$\mathrm{\sigma }$-bonds at right angle

A metal, M forms chlorides in its +2 and +4 oxidation states. Which of the following statements about these chlorides is correct?
1. MCl₂ is more ionic than MCl₄ 
2. MCl₂ is more easily hydrolysed than MCl₄
3. MCl₂ is more volatile than MCl₄
4. MCl₂ is more soluble in anhydrous ethanol than MCl₄

The decreasing values of bond angles from NH₃ (106°) to SbH₃ (91°) down group-15 of the periodic table is due to
1. decreasing lp – bp repulsion 
2. increasing electronegativity
3. increasing bp – bp repulsion 
4. increasing p-orbital character in sp³

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species,
K⁺, Ca⁺², Mg⁺², Be⁺²
1. Be⁺² < K⁺ < Ca⁺² < Mg⁺² 
2. K⁺ <Ca⁺² < Mg⁺² < Be⁺²
3. Ca⁺² < Mg⁺² < Be⁺² < K⁺ 
4. Mg⁺² < Be⁺² <K⁺ <Ca⁺²

Amongst LiCl, RbCl, BeCl2 and MgCl2, the compounds with the greatest and the least ionic character, respectively are :-
1. LiCl and RbCl 
2. RbCl and BeCl₂ 
3. RbCl and MgCl₂ 
4. MgCl₂ and BeCl₂

Polarisibility of halide ions increases in the order :-
1. F^–, I^–, Br^–, Cl^– 
2. Cl^–, Br^–, I^–, F^– 
3. I^–, Br^–, Cl^–, F^– 
4. F^–, Cl^–, Br^–, I^–