Which of the following is the correct order for increasing bond angle?

$(a) N H_{3} < P H_{3} < A s H_{3} < S b H_{3} (b) H_{2} O < O F_{2} < C l_{2} O$
$(c) H_{3} T e^{+} < H_{3} S e^{+} < H_{3} S^{+} < H_{3} O^{+} (d) B F_{3} < B C I_{3} < B B r_{3} < B I_{3}$

Subtopic: Covalent Bond |

53%

Level 3: 35%-60%

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Q138:

Which of the following statements correctly describes the hydrolysis of BCl₃ and NCl₃?

1. NCl₃ is hydrolysed to give HOCl, whereas BCl₃ is not hydrolysed.
2. Both NCl₃ and BCl₃ give HCl on hydrolysis.
3. NCl₃ gives HOCl on hydrolysis, whereas BCl₃ gives HCl.
4. Both NCl₃ and BCl₃ give HOCl on hydrolysis.

Subtopic: Acidic, Basic Character & Fajan's Rule | Polarity |

52%

Level 3: 35%-60%

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Q139:

The correct sequence of the polarity of the following molecules is:
a. Benzene

b .Inorganic Benzene

c. ${PCl}_{3} F_{2}$

d. ${PCl}_{2} F_{3}$

	a	b	c	d
1.	P	NP	NP	P
2.	NP	NP	NP	P
3.	NP	P	NP	P
4.	NP	P	P	NP

(Where P=polar, NP=non-polar)

Subtopic: Polarity |

55%

Level 3: 35%-60%

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Q140:

The incorrect order of boiling point is-

1. $H_{2} O > {CH}_{3} OH$

2. $N {({CH}_{3})}_{3} < NH {({CH}_{3})}_{2}$

3. $H_{3} {PO}_{4} > {Me}_{3} {PO}_{4}$

4. ${CH}_{3} N_{3} > {HN}_{3}$

Subtopic: Polarity | van der Waal Force & Hydrogen Bonding |

57%

Level 3: 35%-60%

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Links

Q141:

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) $C H_{3} O H$ , $C_{2} H_{6}$ , Si ,KCl

(3) KCl, Si, $C_{2} H_{6}$ , $C H_{3} O H$

(4) $C_{2} H_{6}, C H_{3} O H, K C l, S i$

Subtopic: Lattice & Hydration Energy |

Level 3: 35%-60%

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Q142:

Iodine molecules are held in the solid lattice by:

1. London forces 2. dipole-dipole interactions

3. Covalent bonds 4. coulombic force

Subtopic: van der Waal Force & Hydrogen Bonding |

61%

Level 2: 60%+

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Q143:

Which substance has the highest melting point ?

1. CO

2. $C O_{2}$

3. $S i O_{2}$

4. $P_{2} O_{5}$

Subtopic: Lattice & Hydration Energy |

56%

Level 3: 35%-60%

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Q144:

Nodal planes of $π - bond (s) in {CH}_{2} = C = C = {CH}_{2} are located in :$

(1) all are in molecular plane

(2) two in a molecular plane and in a plane peerpendicular to moleclar plane which contains $C - C σ - bond$

(3) one in molecular plane and two in plane perpendicular to molecular plane which bisects $C - C σ - bonds$

(4) two in a molecular plane and one in a plane perpendicular to molecular plane which bisects $C - C σ - bonds$ at right angle.

Subtopic: Hybridisation |

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Level 3: 35%-60%

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Q145:

The hybridisation of the central atom will change when:

1. $N H_{3}$ combines with $H^{+}$

2. $H_{3} B O_{3_{}}$ combines with $O H^{-}$

3. $N H_{3}$ forms $N {H_{2}}^{-}$

4. $H_{2} O$ combines with $H^{+}$

Subtopic: Hybridisation |

68%

Level 2: 60%+

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Q146:

Species having maximum $' C I — O'$ bond order is-

$1 . {CIO}_{3}^{-}$
$2 . {CIO}_{3}$
$3 . {CIO}_{2}_{}$
$4 . {CIO}_{2}^{-}$

Subtopic: Polarity |

56%

Level 3: 35%-60%

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Which of the following is the correct order for increasing bond angle? (a)NH3<PH3<AsH3<SbH3(b)H2O<OF2<Cl2O(c)H3Te+<H3Se+<H3S+<H3O+(d)BF3<BCI3<BBr3<BI3

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Which of the following is the correct order for increasing bond angle?

$(a) N H_{3} < P H_{3} < A s H_{3} < S b H_{3} (b) H_{2} O < O F_{2} < C l_{2} O$
$(c) H_{3} T e^{+} < H_{3} S e^{+} < H_{3} S^{+} < H_{3} O^{+} (d) B F_{3} < B C I_{3} < B B r_{3} < B I_{3}$