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JEE • CHEMISTRY • 14 TH GROUP ELEMENTS (P-BLOCK)

14 th group elements (p-block) practice · Mixed difficulty

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Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

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Showing 181-197 of 197 questions
181 Medium
181 of 197
Analyzing +4 | -1
(A): Diamond is harder than silica.

(R): The C−C{C}-{C} bonds in diamond are stronger than Si−O−Si{Si} - O- {Si} bonds in silica.
View answer and explanation
Correct option: A
Both (A) and (R) are true and (R) is the correct explanation of (A)
Option A (Both (A) and (R) are true and (R) is the correct explanation of (A)) is correct because diamond's hardness is due to the strong covalent C-C bonds, which are stronger than the Si-O-Si bonds in silica.
182 Medium
182 of 197
Understanding +4 | -1
Statement I : Silicones are water repelling in nature
Statement II : Silicones are organosilicon polymers, which have (−R2SiO−)( - {R_2}SiO - ) as repeating unit
View answer and explanation
Correct option: C
Both statements are true
Option C is correct because both statements are true: silicones are water-repelling due to the organic groups attached to silicon, and they are organosilicon polymers with the repeating unit (−R2SiO−)(- {R_2}SiO - ).
183 Easy
183 of 197
Remembering +4 | -1
Which is not used as pigment in paints?
View answer and explanation
Correct option: A
Lead dioxide
Option A (Lead dioxide) is correct because lead dioxide is not typically used as a pigment in paints.
184 Easy
184 of 197
Understanding +4 | -1
The halides of Group 13 elements are
View answer and explanation
Correct option: A
Lewis acids
Option A (Lewis acids) is correct because Group 13 halides have an incomplete octet and can accept electron pairs.
185 Medium
185 of 197
Understanding +4 | -1
Which of the following statement(s) is/are correct regarding CO\mathrm{CO} ?

I. It is colourless and odourless gas.

II. It is water soluble.

III. It is water insoluble.

IV. It acts as reducing agent.

The correct statement(s) is/are
View answer and explanation
Correct option: C
I, III and IV
Option C (I, III and IV) is correct because CO is a colorless, odorless, water-insoluble gas and acts as a reducing agent.
186 Easy
186 of 197
Remembering +4 | -1
Which is not used as a refrigerant?
View answer and explanation
Correct option: D
COCO
Option D (COCO) is correct because NH3NH_3, CO2CO_2, and CCl2F2CCl_2F_2 (Freon) are all commonly used refrigerants, while carbon monoxide (COCO) is not.
187 Easy
187 of 197
Remembering +4 | -1
Which of the following is used in making printer’s ink, shoe polish, black varnish and paint?
View answer and explanation
Correct option: A
Lamp black
Option A (Lamp black) is correct because it is a fine black pigment produced by the incomplete combustion of heavy petroleum products and is commonly used in printer's ink, shoe polish, black varnish, and paint.
188 Medium
188 of 197
Understanding +4 | -1
Which of the following option is correct for the below given two statements?

Statement (I): Silica is almost non-reactive

Statement (II): Si−O{Si}-{O} bond has very high bond enthalpy
View answer and explanation
Correct option: A
Both (I) and (II) are correct and (II) is the correct reason of (I)
Option A (Both (I) and (II) are correct and (II) is the correct reason of (I)) is correct because silica's non-reactivity is due to the high bond enthalpy of the Si-O bond.
189 Medium
189 of 197
Remembering +4 | -1
Prussic acid is the name of:
View answer and explanation
Correct option: C
HCNHCN
Option C (HCNHCN) is correct because Prussic acid is the common name for hydrogen cyanide.
190 Easy
190 of 197
Remembering +4 | -1
In graphite, the sheets are held by :
View answer and explanation
Correct option: C
Van der Waals’ forces
Option C (Van der Waals’ forces) is correct because the sheets of carbon atoms in graphite are held together by weak Van der Waals’ forces.
191 Medium
191 of 197
Understanding +4 | -1
Thermally more stable compound is
View answer and explanation
Correct option: A
CF4C{F_4}
Option A (CF4C{F_4}) is correct because the thermal stability decreases as the size of the halogen increases, due to weaker C-X bond strength.
192 Easy
192 of 197
Remembering +4 | -1
Which compound is solid?
View answer and explanation
Correct option: D
SiO2\mathrm{Si}{\mathrm{O}_2}
Option D (SiO2\mathrm{SiO}_2) is correct because silicon dioxide (SiO2\mathrm{SiO}_2) exists as a solid with a giant network structure at room temperature.
193 Easy
193 of 197
Remembering +4 | -1
Solid CO2\mathrm{C}{\mathrm{O}_2} is known as dry ice, because
View answer and explanation
Correct option: D
It evaporates at −′78∘C- '\mathrm{ }78^\circ C without melting
Option D is correct because solid CO2, known as dry ice, undergoes sublimation at -78°C without melting into a liquid state.
194 Easy
194 of 197
Understanding +4 | -1
Fullerenes are the pure form of carbon because
View answer and explanation
Correct option: C
Fullerenes do not have dangling edge or surface bonds
Option C (Fullerenes do not have dangling edge or surface bonds) is correct because the absence of dangling bonds makes fullerenes chemically stable and a pure form of carbon.
195 Medium
195 of 197
Remembering +4 | -1
Crystalline silicon was obtained by:
View answer and explanation
Correct option: C
Deville
Option C (Deville) is correct because crystalline silicon was first obtained by Deville.

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196 Medium
196 of 197
Remembering +4 | -1
Which glass has the highest percentage of lead?
View answer and explanation
Correct option: B
Flint glass
Option B (Flint glass) is correct because flint glass, also known as lead glass, contains a high percentage of lead oxide (PbO).
197 Medium
197 of 197
Understanding +4 | -1
Assertion (A) : CO\mathrm{CO} is toxic.

Reason (R) : CO\mathrm{CO} forms complex with haemoglobin in the blood, and this complex is more stable than oxy-haemoglobin.
View answer and explanation
Correct option: A
Both A\mathbf{A} and R\mathbf{R} are true and R\mathbf{R} is the correct explanation of A\mathbf{A}.
Option A is correct because both the assertion and reason are true, and the reason correctly explains why CO is toxic.
Revision notes and key takeaways

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Showing 181-197 of 197 questions

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