In This Post we are providing Chapter-4 The p-block Elements NCERT MCQ for Class 11 Chemistry which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.
NCERT MCQ ON THE p-BLOCK ELEMENTS
Question 1 : 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 2 : The element which shows least metallic character is
- a) Boron
- b) Gallium
- c) Indium
- d) Aluminium
Answer : Boron
Question 3 : Which one of the following has the lowest m.p.?
- a) Ga
- b) B
- c) Al
- d) Tl
Answer : Ga
Question 4 : Which of the following does not form M3+ ion?
- a) Boron
- b) Indium
- c) Aluminium
- d) Gallium
Answer : Boron
Question 5: 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 6: 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 7 : Aluminium chloride is a/an
- a) Lewis acid
- b) Bronsted – Lowery acid
- c) Arhenius acid
- d) Lewis base
Answer : Lewis acid
Question 8 : The strongest Lewis acid is
- a) BI3
- b) BCl3
- c) BF3
- d) BBr3
Answer : BI3
Question 9 : Which metal is protected by a layer of its own oxide?
- a) Al
- b) Au
- c) Ag
- d) Fe
Answer : Al
Question 10 : 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 11 : 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 12: Which of the following does not react with aqueous NaOH ?
- a) B
- b) Al
- c) Ga
- d) Tl
Answer : B
Question 13 : In borax bead test which compound is formed?
- a) Meta-borate
- b) Tetra-borate
- c) Ortho-borate
- d) Double oxide
Answer : Meta-borate
Question 14 : 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 15 : Orthoboric acid when heated to red hot gives
- a) pyroboric acid
- b) boric anhydride
- c) metaboric acid
- d) boron and water
Answer : pyroboric acid
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