p- Block Elements — DPP 3

20 NEET questions from p- Block Elements, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
Correct order of IP of Gr 13
  1. A $\mathrm { B } > \mathrm { Al } > \mathrm { Ga } > \mathrm { In } > \mathrm { Tl }$
  2. B $\mathrm { B } > \mathrm { Al } < \mathrm { Ga } >$ In $>$ Tl
  3. C $\mathrm { B } > \mathrm { Al } < \mathrm { Ga } > \mathrm { In } < \mathrm { Tl }$
  4. D $\mathrm { B } > \mathrm { Al } < \mathrm { Ga } < \mathrm { In } > \mathrm { Tl }$
Show answer & explanation

Correct answer: C

p- Block Elements – NEET-10714
2
Aluminium vessel should not be washed with material containing washing soda because-
  1. A Washing soda is easily decomposed
  2. B Washing soda is expensive
  3. C Washing soda reacts with Aluminium to forms soluble aluminate
  4. D Washing soda reacts with Aluminium to forms insoluble aluminium oxide
Show answer & explanation

Correct answer: C

Aluminium vessel should not be washed with washing soda because it reacts with aluminium to form soluble aluminate.
3
Which compound is used in the pickling of stainless steel -
  1. A Sulphuric acid
  2. B Nitric acid
  3. C Phosphine gas
  4. D Phosphorous
Show answer & explanation

Correct answer: B

Nitric acid is used in the pickling of steel.
4
Impurities responsible for inflammable nature of $\mathrm { PH } _ { 3 }$ is/are -
  1. A $\mathrm { P } _ { 2 } \mathrm { H } _ { 4 }$
  2. B $\mathrm { P } _ { 4 }$ vapours
  3. C Both
  4. D None
Show answer & explanation

Correct answer: C

PH$_{3}$ can be inflammable in the presence of impurity of P$_{2}$H$_{4}$, P$_{4}$ vapours.
5
$\mathrm { P } _ { 4 } \mathrm { O } _ { 10 }$ is used extensively as a :
  1. A Dehydrating agent
  2. B Catalytic agent
  3. C Reducing agent
  4. D Preservative
Show answer & explanation

Correct answer: A

P$_{4}$O$_{10}$ is used as Dehydrating agent for many complexes.
6
$\mathrm { NH } _ { 3 }$ act as a -
  1. A Lewis acid
  2. B Lewis base
  3. C Amphoteric
  4. D None
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Correct answer: B

NH₃ can act as a Lewis base Lone Pair donor.
7
Which of the following statement is true about white phosphorous \& red phosphorous?
  1. A Both are soluble in CS$_ { 2 }$
  2. B Both are poisonous
  3. C Both can be oxidised by air
  4. D Both glow in dark
Show answer & explanation

Correct answer: C

Both red & white phosphorous can be oxidised be air.
8
From $\mathrm { B } _ { 2 } \mathrm { H } _ { 6 }$ all the following can be prepared except :
  1. A $\mathrm { H } _ { 3 } \mathrm { BO } _ { 3 }$
  2. B $\mathrm { B } _ { 2 } \left( \mathrm { CH } _ { 3 } \right) _ { 4 } \mathrm { H } _ { 2 }$
  3. C $\mathrm { B } _ { 2 } \left( \mathrm { CH } _ { 3 } \right) _ { 6 }$
  4. D $\mathrm { NaBH } _ { 4 }$
Show answer & explanation

Correct answer: C

B$_{2}$H$_{6}$ all terminal H can be displaced but in [B$_{2}$(CH$_{3}$)$_{6}$] all hydrogen is removed so B$_{2}$(CH$_{3}$)$_{6}$ cannot be formed.
9
$\mathrm { NO } _ { 2 }$ is formed when
  1. A Cu reacts with conc. $\mathrm { HNO } _ { 3 }$
  2. B Zn reacts with conc. $\mathrm { HNO } _ { 3 }$
  3. C $\mathrm { Pb } \left( \mathrm { NO } _ { 3 } \right) _ { 2 }$ is heated
  4. D All
Show answer & explanation

Correct answer: D

NO₂ is formed
Cu + conc. HNO₃ → Metal Nitrate + NO₂
Zn + conc. HNO₃ → Metal Nitrate + NO₂
$\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2} \xrightarrow{\Delta} \mathrm{PbO}+\mathrm{NO}_{2}+\mathrm{O}_{2}$
By all these 3 reaction NO₂ is evolved.
10
Nature of $\mathrm { GeO } _ { 2 }$ is
  1. A Acidic
  2. B Basic
  3. C Amphoteric
  4. D Neutral
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Correct answer: A

Some of the p block oxides are amphoteric & neutral but maximum are acidic. GeO$_{2}$ is acidic by nature.
11
Phosphine gas is used in -
  1. A Smoke screen
  2. B Home screen
  3. C Inert atmosphere
  4. D As a fuel
Show answer & explanation

Correct answer: A

Phosphine gas is used in creation of smoke screen.
12
Haber's process is used in manufacturing of -
  1. A Ammonia
  2. B Sadium azide
  3. C Phosphine
  4. D None
Show answer & explanation

Correct answer: A

Haber’s Process
$\mathrm{N}_{2}+3 \mathrm{H}_{2} \xrightarrow{\text { condition }} \underset{\text { Ammonia }}{2 \mathrm{NH}_{3}}$
13
Which stability order is incorrect
  1. A $\mathrm { Pb } ^ { + 2 } > \mathrm { Pb } ^ { + 4 }$
  2. B $\mathrm { Sn } ^ { + 2 } > \mathrm { Sn } ^ { + 4 }$
  3. C $\mathrm { Sn } ^ { + 2 } < \mathrm { Pb } ^ { + 2 }$
  4. D $\mathrm { Sn } ^ { + 4 } > \mathrm { Pb } ^ { + 4 }$
Show answer & explanation

Correct answer: B

Sn$^{+2}$ < Sn$^{+4}$ (Is more stable)
Do not posses inert pair effect so Higher Oxidising state is more stable.
14
Alum is not used as -
  1. A As a mordant in dyeing
  2. B As an insecticide
  3. C In the purification of water
  4. D In the tanning of leather
Show answer & explanation

Correct answer: B

Alum is used as mordant, purification of water, fanning of leather not as an insecticide.
15
What is the Ratio of number of $\mathrm { P } - \mathrm { P }$ bond in hypophosphoric acid, number of $\mathrm { P } - \mathrm { H }$ bond in Pyrophosphorous acid and number of $\mathrm { P } - \mathrm { OH }$ bond in cyclotrimetaphosphoric acid respectively?
  1. A $2 : 1 : 3$
  2. B $1 : 2 : 3$
  3. C $2 : 2 : 1$
  4. D $1 : 2 : 2$
Show answer & explanation

Correct answer: B

Ratio of
p- Block Elements – NEET-10862
16
Crucibles made by which material is inert to dilute acids and alkalies.
  1. A Graphite
  2. B Aluminum
  3. C Boron
  4. D Iron
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Correct answer: A

Crucibles is made up of Graphite.
17
Liquid nitrogen is used as a refrigerant to preserve-
  1. A Biological material
  2. B Food items
  3. C In cryosurgery
  4. D All of the above
Show answer & explanation

Correct answer: D

In the preservation of biological material, food items, in cryogenic surgery.
18
A gas which is used as anaesthetic in dental surgery is :
  1. A $\mathrm { N } _ { 2 }$
  2. B CO
  3. C $\mathrm { N } _ { 2 } \mathrm { O }$
  4. D $\mathrm { NH } _ { 3 }$
Show answer & explanation

Correct answer: C

N₂O is used in anaesthetic dental surgery.
19
Which does not show Allotropy
  1. A N
  2. B P
  3. C Sb
  4. D Bi
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Correct answer: A

Nitrogen do not show allotropy.
20
$\mathrm { PCl } _ { 3 }$ can be obtained by reaction of
  1. A $\mathrm { P } _ { 4 } + \mathrm { SOCl } _ { 2 } \rightarrow$
  2. B $\mathrm { P } _ { 4 } + \mathrm { SO } _ { 2 } \mathrm { Cl } _ { 2 } \rightarrow$
  3. C Both
  4. D None
Show answer & explanation

Correct answer: A

P$_{4}$ + SOCl$_{2}$ → [PCl$_{3}$] + SO₂

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