CBSE Class 11 Chemistry p Block Elements MCQs Set B

 

Question: The non-metal oxides are ____x____ whereas metal oxides are ___y ____ in nature.

  • a) x = acidic or neutral, y = basic
  • b) x = neutral, y = basic
  • c) x = acidic, y = neutral
  • d) x = basic, y = acidic

Answer: x = acidic or neutral, y = basic

 

Question: Which of the following is most abundant in the earth crust ?

  • a) Aluminium
  • b) Thallium
  • c) Boron
  • d) Gallium

Answer: Aluminium

 

Question: Which of the following properties of aluminium makes it useful for food packaging ?

  • a) Low density
  • b) Non toxicity
  • c) Good thermal conductivity
  • d) Good electrical conductivity

Answer: Low density

 

Question: Which of the following is/are true regarding gallium?

(i) It has unusually low melting point (303 K).
(ii) It exist in liquid state during summer.
(iii) It has a high boiling point (2676 K).
The correct option is

  • a) (i), (ii) and (iii)
  • b) (i) and (ii)
  • c) (i) and (iii)
  • d) (ii) and (iii)

Answer: (i), (ii) and (iii)

 

Question: The element which shows least metallic character is

  • a) Boron
  • b) Gallium
  • c) Indium
  • d) Aluminium

Answer: Boron

 

Question: Which one of the following has the lowest m.p.?

  • a) Ga
  • b) B
  • c) Al
  • d) Tl

Answer: Ga

 

Question: Which of the following does not form M3+ ion?

  • a) Boron
  • b) Indium
  • c) Aluminium
  • d) Gallium

Answer: Boron

 

Question: The group 13 element that is liquid during summer and used for measuring high temperature is

  • a) Gallium
  • b) Boron
  • c) Aluminium
  • d) Indium

Answer: Gallium

 

Question: Thallium shows different oxidation states because

  • a) of inert pair effect
  • b) of its amphoteric character
  • c) of its higher reactivity
  • d) it is transition element

Answer: of inert pair effect

 

Question: Aluminium chloride is a/an

  • a) Lewis acid
  • b) Bronsted - Lowery acid
  • c) Arhenius acid
  • d) Lewis base

Answer: Lewis acid

 

More Questions.......................

 

Question: The strongest Lewis acid is

  • a) BI3
  • b) BCl3
  • c) BF3
  • d) BBr3

Answer: BI3

 

Question: Which metal is protected by a layer of its own oxide?

  • a) Al
  • b) Au
  • c) Ag
  • d) Fe

Answer: Al

 

Question: Aluminium vessels should not be washed with materials containing washing soda because

  • a) washing soda reacts with aluminium to form soluble aluminate
  • b) washing soda reacts with aluminium to form insoluble aluminium oxide
  • c) washing soda is easily decomposed
  • d) washing soda is expensive

Answer: washing soda reacts with aluminium to form soluble aluminate

 

Question: When Al is added to KOH solution

  • a) hydrogen is evolved
  • b) oxygen is evolved
  • c) no action takes place
  • d) water is produced

Answer: hydrogen is evolved

 

Question: Which of the following does not react with aqueous NaOH ?

  • a) B
  • b) Al
  • c) Ga
  • d) Tl

Answer: B

 

Question: Boron forms covalent compound due to

  • a) Both
  • b) higher ionization energy
  • c) small size
  • d) None of these

Answer: Both

 

Question: NH3 and BF3 form an adduct readily because they form

  • a) a coordinate bond
  • b) an ionic bond
  • c) a hydrogen bond
  • d) a covalent bond

Answer: a coordinate bond

 

Question: In borax bead test which compound is formed?

  • a) Meta-borate
  • b) Tetra-borate
  • c) Ortho-borate
  • d) Double oxide

Answer: Meta-borate

 

Question: Boric acid is polymeric due to

  • a) the presence of hydrogen bonds
  • b) its acidic nature
  • c) its monobasic nature
  • d) its geometry

Answer: the presence of hydrogen bonds

 

Question: Orthoboric acid when heated to red hot gives

  • a) pyroboric acid
  • b) boric anhydride
  • c) metaboric acid
  • d) boron and water

Answer: pyroboric acid

 

Tags: 

 


Click for more Chemistry Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Celebration of Republic Day by CBSE

As you are aware, Republic Day is celebrated every year on 26th January to honour the Constitution and Republic of our country. Celebration of this occasion annually helps youth and children of our country to be aware of the significance of Indian Constitution, unity...

Digital Marks Sheets Migration Certificates and Pass Certificates

CBSE pioneered in providing digital academic documents through its academic repository called “Parinam Manjusha” and DigiLocker.  As on now result data from 2004 till this year is available in the repository.  Approx. 12 crores digital academic documents are available...

Tricks for Utilization of additional time introduced in CBSE Board Exams

Tricks for Proper Utilization of Add-On 15 Minutes introduced in CBSE Board Exams The intend of this article is to share the best suggestions and guidelines to utilize the extra 15 minutes provided for reading the question paper in CBSE Board Examination. These extra...

BRICS International Online Mathematics Competition

BRICSMATH.COM is an annual International Online Competition in Mathematics, for students of classes I – XII of 07 BRICS countries (Brazil, Russia, India, China and South Africa, Indonesia and Vietnam). The competition is held online on the website www.bricsmath.com and...

How to Effectively Answer CBSE Board Examination Question Papers

The intend of this article is to share the best ways to answer the CBSE Board Examination. Usually most of the students tend to become nervous at the times of the board examination. In this article we will share the most effective ways to make the answers to the CBSE...

×
Studies Today