Decreasing order of stability of ${\mathrm{O}}_2,<mspace\; width="1em"></mspace>{\mathrm{O}}_2^{-},<mspace\; width="1em"></mspace>{\mathrm{O}}_2^{+}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{O}}_2^{2-}<mspace\; width="1em"></mspace>\mathrm{is}$

1. ${\mathrm{O}}_2^{+}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{2-}$

2. ${\mathrm{O}}_2^{2-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{+}$

3. ${\mathrm{O}}_2^{}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{+}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{2-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{-}$

4. ${\mathrm{O}}_2^{-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{2-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{+}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{}$

${\mathrm{O}}_2,<mspace\; width="1em"></mspace>{\mathrm{O}}_2^{-},<mspace\; width="1em"></mspace>{\mathrm{O}}_2^{+}<mspace\; width="1em"></mspace>\mathrm{और}<mspace\; width="1em"></mspace>{\mathrm{O}}_2^{2-}$ के स्थायित्व का घटता क्रम है-

1. ${\mathrm{O}}_2^{+}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{2-}$

2. ${\mathrm{O}}_2^{2-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{+}$

3. ${\mathrm{O}}_2^{}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{+}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{2-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{-}$

4. ${\mathrm{O}}_2^{-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{2-}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{+}<mspace\; width="1em"></mspace>><mspace\; width="1em"></mspace>{\mathrm{O}}_2^{}$

Which of the following is correct order of dipole moment of the following ?

(1) I >  II > III

(2) I = II = III

(3) III > II > I

(4) I > III > II

निम्नलिखित में से कौन सा द्विध्रुव आधूर्ण का सही क्रम है?

(1) I >  II > III

(2) I = II = III

(3) III > II > I

(4) I > III > II

When the substances Si, KCl, $C{H}_3$OH and $C_2{H}_6$ are arranged in order of increasing melting point , what is the correct order?

1. Si, KCl, $C{H}_3$OH, $C_2{H}_6$

2. $C{H}_{3}OH$, $C_2{H}_6$, Si, KCl

3. KCl, Si, $C_2{H}_6$, $C{H}_{3}OH$

4. $C_2{H}_6,<mspace\; width="1em"></mspace>C{H}_{3}OH<mspace\; width="1em"></mspace>,<mspace\; width="1em"></mspace>KCl<mspace\; width="1em"></mspace>,<mspace\; width="1em"></mspace>Si$

जब पदार्थ Si, KCl, $C{H}_3$OH और$C_2{H}_6$ बढ़ते गलनांक के क्रम में व्यवस्थित होते हैं, सही क्रम क्या है?

1. Si, KCl, $C{H}_3$OH, $C_2{H}_6$

2. $C{H}_{3}OH$, $C_2{H}_6$, Si, KCl

3. KCl, Si, $C_2{H}_6$, $C{H}_{3}OH$

4. $C_2{H}_6,<mspace\; width="1em"></mspace>C{H}_{3}OH<mspace\; width="1em"></mspace>,<mspace\; width="1em"></mspace>KCl<mspace\; width="1em"></mspace>,<mspace\; width="1em"></mspace>Si$

Minimum $\mathrm{F}—\mathrm{S}—\mathrm{F}$ bond angle present in:

1. ${\mathrm{SSF}}_{2<mspace\; width="1em"></mspace>}$ 

2. ${\mathrm{SF}}_6$

3. ${\mathrm{SF}}_2$     

4. ${\mathrm{F}}_3\mathrm{SSF}$

किसमें न्यूनतम $\mathrm{F}—\mathrm{S}—\mathrm{F}$ बंध कोण उपस्थित है?

1. ${\mathrm{SSF}}_{2<mspace\; width="1em"></mspace>}$ 

2. ${\mathrm{SF}}_6$

3. ${\mathrm{SF}}_2$     

4. ${\mathrm{F}}_3\mathrm{SSF}$

Which one of the following species does not exist?

1. ${\mathrm{Be}}_2^{+}$

2. Be₂

3. B₂

4. N₂

निम्नलिखित में से कौन सी स्पीशीज अस्तित्व में नहीं है?

1. ${\mathrm{Be}}_2^{+}$

2. Be₂

3. B₂

4. N₂

In the case of alkali metals, the covalent character decreases in the order

1. MCl > MI > MBr > MF

2. MF > MCl >  MBr > MI 

3. MF > MCl > MI > MBr

4. MI > MBr > MCl > MF

क्षार धातुओं के मामले में, सहसंयोजी लक्षण किस क्रम में घटता है?

1. MCl > MI > MBr > MF

2. MF > MCl >  MBr > MI 

3. MF > MCl > MI > MBr

4. MI > MBr > MCl > MF

The correct bond order in the following species is

1. ${\mathrm{O}}_2^{2+}>{\mathrm{O}}_2^{+}>{\mathrm{O}}_2^{-}$

2. ${\mathrm{O}}_2^{2+}<{\mathrm{O}}_2^{-}<{\mathrm{O}}_2^{+}$

3. ${\mathrm{O}}_2^{+}>{\mathrm{O}}_2^{-}<{\mathrm{O}}_2^{2+}$

4.${\mathrm{O}}_2^{-}<{\mathrm{O}}_2^{+}>{\mathrm{O}}_2^{2+}$

निम्नलिखित स्पीशीज में सही बंध कोटि है-

1. ${\mathrm{O}}_2^{2+}>{\mathrm{O}}_2^{+}>{\mathrm{O}}_2^{-}$

2. ${\mathrm{O}}_2^{2+}<{\mathrm{O}}_2^{-}<{\mathrm{O}}_2^{+}$

3. ${\mathrm{O}}_2^{+}>{\mathrm{O}}_2^{-}<{\mathrm{O}}_2^{2+}$

4.${\mathrm{O}}_2^{-}<{\mathrm{O}}_2^{+}>{\mathrm{O}}_2^{2+}$

Which ionic compound has the largest amount of lattice energy?

$$\begin{gathered} 1.<mspace\; width="1em"></mspace>NaF<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2.<mspace\; width="1em"></mspace>Al{F}_3<mspace\; width="1em"></mspace> \\ 3.<mspace\; width="1em"></mspace>AIN<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>4.<mspace\; width="1em"></mspace>Mg{F}_2 \end{gathered}$$

किस आयनिक यौगिक में जालक ऊर्जा की सबसे बड़ी मात्रा होती है?

$$\begin{gathered} 1.<mspace\; width="1em"></mspace>NaF<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>2.<mspace\; width="1em"></mspace>Al{F}_3<mspace\; width="1em"></mspace> \\ 3.<mspace\; width="1em"></mspace>AIN<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>4.<mspace\; width="1em"></mspace>Mg{F}_2 \end{gathered}$$

In which of the following compounds B$—$F bond length is shortest ?

(a) $B{F_4}^{-}$       (b) $B{F}_3\leftarrow N{H}_3$

(c) $B{F}_3$         (d) $B{F}_3\leftarrow N{\left(C{H}_3\right)}_3$

निम्नलिखित में से किस यौगिक में B$—$F बंध लंबाई सबसे छोटी है?

(a) $B{F_4}^{-}$     (b) $B{F}_3\leftarrow N{H}_3$

(c) $B{F}_3$       (d) $B{F}_3\leftarrow N{\left(C{H}_3\right)}_3$

Specify the coordination geometry around and hybridization of N and B atoms in a 1:1 complex of $B{F}_3$ and $N{H}_3$:

1. N: tetrahedral, $s{p}^3$; B : tetrahedral, $s{p}^3$

2. N: pyramidal, $s{p}^3$; B : pyramidal, $s{p}^3$

3. N: pyramidal, $s{p}^3$; B: planar, $s{p}^2$

4. N: pyramidal, $s{p}^3$; B: tetrahedral, $s{p}^3$

$B{F}_3$ और $N{H}_3$ के एक 1:1 संकुल में चारों ओर समन्वय ज्यामिति और N और B परमाणुओं के संकरण को निर्दिष्ट कीजिए:

1. N: चतुष्फलकीय, $s{p}^3$; B: चतुष्फलकीय ,$s{p}^3$

2. N: पिरामिडी, $s{p}^3$; B: पिरामिडी, $s{p}^3$

3. N: पिरामिडी, $s{p}^3$; B: समतलीय, $s{p}^2$

4. N: पिरामिडी, $s{p}^3$; B: चतुष्फलकीय, $s{p}^3$