Recommended PYQs (STRICTLY NCERT Based) The p-Block Elements (XI) Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Identify the Incorrect statement:

1.	Carbon has the tendency to form chains and rings with itself.
2.	Silicon and Germanium are useful in semiconductor industry.
3.	Boron trifluoride is a strong Lewis acid.
4.	Common oxidation states of group 14 elements are +1 and +3.

Subtopic: Structure & Properties of Allotropes of C |

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Q2:

Identify the incorrect statement:

1.	The relative stability of group 13 elements in +1 oxidation state varies as: Al < Ga < In < Tl.
2.	Boron trioxide is acidic; aluminium and gallium trioxides are amphoteric, while indium and thallium trioxides are basic.
3.	The hybridisation of Al in $\left[\mathrm{Al}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ is $\text{d}^2\text{ sp}^3.$
4.	Two isotopes of Boron, namely $^{10}\!\mathrm{~B}(19 \%)$ and , $^{11}\! \mathrm{~B}(81 \%)$ are known.

Subtopic: Boron Family- Preparations, Properties & Uses |

74%

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Q3:

Match the allotropes of cabon given in List I with the respective characteristics given in List II.

	List-I		List-II
A.	Coke	I.	Carbon atoms are sp³hybridised.
B.	Diamond	II.	Used as a dry lubricant
C.	Fullerene	III.	Used as a reducing agent
D.	Graphite	IV.	Cage like molecules

Choose the correct answer from the options given below:

Options:	(A)	(B)	(C)	(D)
1.	III	IV	I	II
2.	II	IV	I	III
3.	IV	I	II	III
4.	III	I	IV	II

Subtopic: Compounds of Carbon, Preparations, Properties & Uses |

76%

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Q4:

Identify the correct relationship of stability from the options provided.
1.

T l I > T l I_{3}

$\mathrm{TlI > TlI_3}$
2.

T l C l_{3} > T l C l

$\mathrm{TlCl_3 > TlCl}$
3.

I n I_{3} > I n I

$\mathrm{InI_3 > InI }$
4.

A l C l > A l C l_{3}

$\mathrm{AlCl > AlCl_3 }$

Subtopic: Compounds of Boron- Preparations, Properties & Uses |

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Q5:

Select the element (M) whose trihalides cannot be hydrolysed to form [M(H₂O)₆]³⁺.

1.	Ga	2.	In
3.	Al	4.	B

Subtopic: Boron Family- Preparations, Properties & Uses |

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Q6:

The

E^{⊖}

$E^{\ominus}$ values for

\begin{aligned} {A l}^{+} / A l = + 0.55 V and {T l}^{+} / T l = - 0.34 V \\ {A l}^{3 +} / A l = - 1.66 V and {T l}^{3 +} / T l = + 1.26 V \end{aligned}

$\begin{aligned} & \mathrm{Al}^+ / \mathrm{Al}=+0.55 \mathrm{~V} \text { and } \mathrm{Tl}^{+} / \mathrm{Tl}=-0.34 \mathrm{~V} \\ & \mathrm{Al}^{3+} / \mathrm{Al}=-1.66 \mathrm{~V} \text { and } \mathrm{Tl}^{3+} / \mathrm{Tl}=+1.26 \mathrm{~V} \end{aligned}$
The incorrect statement among the following is:

1. Al is more electropositive than TI.
2. Tl³⁺ is a good reducing agent than Tl¹⁺.
3. Al⁺ is unstable in solution.
4. Tl can be easily oxidized to Tl⁺ as compared to Tl³⁺.

Subtopic: Boron Family- Preparations, Properties & Uses |

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Q7:

Which of the following statements is not correct about diborane?

1.	Both the boron atoms are sp² hybridised.
2.	There are two 3-centre-2-electron bonds.
3.	The four terminal B-H bonds are 2-centre-2-electron bonds.
4.	The four terminal hydrogen atoms and the two boron atoms lie in one plane.

Subtopic: Compounds of Boron- Preparations, Properties & Uses |

65%

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Q8:

Choose the correct statement:

1.	Both diamond and graphite are used as dry lubricants.
2.	Diamond and graphite have a two-dimensional network.
3.	Diamond is covalent and graphite is ionic.
4.	Diamond is sp³ hybridised and graphite is sp² hybridized.

Subtopic: Structure & Properties of Allotropes of C |

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Q9:

Which of the following is the correct statement?
1. Ga⁺ is more stable than ln⁺.
2. Al⁺ is more stable than ln⁺.
3. Ga⁺ is more stable than Al⁺.
4. Al⁺ is more stable than Ga⁺.

Subtopic: Boron Family- Preparations, Properties & Uses |

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Q10:

The chain length of silicones can be controlled by adding:
1. $\mathrm{CH_3SiCl_3}$
2. $\mathrm{SiCl_4}$
3. $\mathrm{(CH_3)_2SiCl_2}$
4. $\mathrm{(CH_3)_3SiCl}$

Subtopic: Properties of Structure of SiO2 & Other Compounds |

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