JEE Chemistry The P Block Elements MCQs Set E

Question: Argon is used

• a) in high temperature welding
• b) in radiotherapy for treatment of cancer
• c) to obtain low temperature
• d) in filling airships

Answer: in high temperature welding

Question: Which one of the following statements regarding helium isincorrect ?

• a) It is used to fill gas balloons instead of hydrogen because it is lighter and non-inflammable
• b) It is used to produce and sustain powerful superconducting magnets
• c) None of these
• d) It is used in gas-cooled nuclear reactors.

Answer: It is used to fill gas balloons instead of hydrogen because it is lighter and non-inflammable

Question: Noble gases are used in discharge tubes to gives different colours. Reddish orange glow is due to

• a) Ne
• b) Kr
• c) Ar
• d) Xe

Answer: Ne

Question: The coloured discharge tubes for advertisement mainly contain

• a) neon
• b) xenon
• c) helium
• d) argon

Answer: neon

Question: Sea divers go deep in the sea water with a mixture of which of the following gases

• a) O₂ and He
• b) O₂ and CO₂
• c) O₂ and Ar
• d) None of  these

Answer: O₂ and He

Question:  Which of the following is the life saving mixture for an asthma patient ?

• a) Mixture of helium and oxygen
• b) Mixture of neon and oxygen
• c) Mixture of xenon and nitrogen
• d) Mixture of argon and oxygen

Answer: Mixture of helium and oxygen

Question: Which of the following statements are true?

(i) Only type of interactions between particles of noble gases are due to weak dispersion forces.
(ii) Ionisation enthalpy of molecular oxygen is very close to that of xenon.
(iii) Hydrolysis of XeF₆ is redox reaction.
(iv) Xenon fluorides are not reactive.

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

Answer: (i) and (ii)

Question: Which of the following element has the property of diffusing through most commonly used laboratory materials such as rubber, glass or plastics

• a) He
• b) Xe
• c) Rn
• d) Ar

Answer: He

Question: Which of the following is used to produce and sustain powerful superconducting magnets to form an essential part of NMR spectrometer

• a) He
• b) Ne
• c) Ar
• d) Rn

Answer: He

Question: Which of the following statements are correct?

(i) Arsenic and antimony are metalloids.
(ii) Phosphorus, arsenic and antimony are found mainly as sulphide minerals.
(iii) Covalent redii increases equally from N to Bi.
(iv) Elements of group 15 have extra stability and higher ionisation energy due to exactly half filled ns²np³ electronic configuration.
(v) In group 15 elements only nitrogen is gas whereas all others are solids.

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

Answer: (i), (iv) and (v)

Question:

• a) TFTTF
• b) FTFFT
• c) FFTTF
• d) TFTFT

Answer: TFTTF

Question:

• a) (iii) and (iv)
• b) (ii) only
• c) (i) and (iv)
• d) (ii) and (iii)

Answer: (iii) and (iv)

Question:

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

Answer: (i), (ii) and (iv)

Question:

• a) TTFT
• b) TFFT
• c) TTFF
• d) FTFT

Answer: TTFT

Question:

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

Answer: (i), (iii) and (iv)

Question:

• a) TFTT
• b) TFFT
• c) TTFF
• d) FTFT

Answer: TFTT

Question:

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

Answer: (i), (iii) and (iv)

Question:

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

Answer: (i) and (ii)

Question:

• a) A – (q), B – (r,s), C – (s), D – (p)
• b) A – (q), B – (s), C – (r, s), D – (p)
• c) A – (q), B – (r, s), C – (p), D – (s)
• d) A – (r, s), B – (q), C – (s), D – (p)

Answer: A – (q), B – (r,s), C – (s), D – (p)

Question:

• a) A – (r), B – (p), C – (q)
• b) A – (r), B – (q), C – (p)
• c) A – (p), B – (r), C – (q)
• d) A – (q), B – (p), C – (r)

Answer: A – (r), B – (p), C – (q)

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

Question:

• a) (A) – (s), (B) – (r), (C) – (q), (D) – (p)
• b) (A) – (p), (B) – (r), (C) – (q), (D) – (s)
• c) (A) – (s), (B) – (r), (C) – (p), (D) – (q)
• d) (A) – (q), (B) – (r), (C) – (p), (D) – (s)

Answer: (A) – (s), (B) – (r), (C) – (q), (D) – (p)

Question:

• a) A – (q), B – (s), C – (r), D – (p)
• b) A – (q), B – (r), C – (s), D – (p)
• c) A – (s), B – (q), C – (r), D – (p)
• d) A – (q), B – (s), C – (p), D – (r)

Answer: A – (q), B – (s), C – (r), D – (p)

Question:

• a) A – (p), B – (r), C – (q), D – (s)
• b) A – (r), B – (p), C – (q), D – (s)
• c) A – (p), B – (q), C – (r), D – (s)
• d) A – (p), B – (r), C – (s), D – (q)

Answer: A – (p), B – (r), C – (q), D – (s)

Question:

• a) A – (s), B – (p), C – (q), D – (r)
• b) A – (r), B – (q), C – (s), D – (p)
• c) A – (s), B – (r), C – (p), D – (q)
• d) A – (p), B – (q), C – (r), D – (s)

Answer: A – (s), B – (p), C – (q), D – (r)

Question:

• a) A – (r), B – (s), C – (q), D – (p)
• b) A – (p), B – (q), C – (r), D – (s)
• c) A – (p), B – (s), C – (r), D – (q)
• d) A – (r), B – (q), C – (p), D – (s)

Answer: A – (r), B – (s), C – (q), D – (p)

Question:

• a) A – (p, s), B – (s), C – (p, r), D – (q, s)
• b) A – (s), B – (p, s), C – (p, r), D – (q, s)
• c) A – (s), B – (p, r), C – (p, s), D – (q, s)
• d) A – (p, s), B – (s), C – (q, s), D – (p, r)

Answer:  A – (p, s), B – (s), C – (p, r), D – (q, s)

Question:

• a) A – (r), B – (p), C – (q)
• b) A – (q) , B – (p), C – (r)
• c) A – (p), B – (r), C – (q)
• d) A – (r), B – (q), C – (p)

Answer: A – (r), B – (p), C – (q)

Question:

• a) A – (p), B – (r, s), C – (p, q), D – (p, s)
• b) A – (r, s), B – (p), C – (r, s), D – (p, s)
• c) A – (p), B – (p, q), C – (r, s), D – (p, s)
• d) A – (p), B – (r, s), C – (p, s), D – (p, q)

Answer:  A – (p), B – (r, s), C – (p, q), D – (p, s)

Question:

• a) A – (q), B – (p), C – (s), D – (r)
• b) A – (p), B – (q), C – (r), D – (s)
• c) A – (p), B – (s), C – (p), D – (r)
• d) A – (p), B – (r), C – (q), D – (s)

Answer:  A – (q), B – (p), C – (s), D – (r)

Question:

• a) A – (p), B – (r), C – (s), D – (q)
• b) A – (p), B – (q), C – (s), D – (r)
• c) A – (s), B – (r), C – (p), D – (q)
• d) A – (s), B – (p), C – (q), D – (s)

Answer: A – (p), B – (r), C – (s), D – (q)

Question:

Assertion : Dinitrogen is inert at room temperature.
Reason : Dinitrogen directly combines with lithium to form ionic nitrides.

• a) Assertion is correct, reason is incorrect
• b) Assertion is incorrect, reason is correct
• c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
• d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: Assertion is correct, reason is incorrect

Question:

Assertion : When a metal is treated with conc. HNO₃ it generally yields a nitrate, NO₂ and H₂O.
Reason : Conc. HNO₃ reacts with metal and first produces a metal nitrate and nascent hydrogen. The nascent hydrogen then further reduces HNO₃ to NO₂.

• a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
• b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
• c) Assertion is correct, reason is incorrect
• d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

Question:

Assertion : N₂ is less reactive than P₄.
Reason : Nitrogen has more electron gain enthalpy than phosphorus.

• a) Assertion is correct, reason is incorrect
• b) Assertion is incorrect, reason is correct
• c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
• d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: Assertion is correct, reason is incorrect

Question:

Assertion : White phosphorus is more reactive than red phosphorus.
Reason : Red phosphorus consists of P₄ tetrahedral units linked to one another to form linear chains

• a) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
• b) Assertion is correct, reason is incorrect
• c) Assertion is incorrect, reason is correct
• d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: Assertion is correct, reason is correct; reason is not a correct explanation for assertion

Question:

Assertion : Bond angle of H₂S is smaller than H₂O.
Reason : Electronegativity of the central atom increases, bond angle decreases

• a) Assertion is correct, reason is incorrect
• b) Assertion is incorrect, reason is correct
• c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
• d) Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Answer: Assertion is correct, reason is incorrect

Question:

• a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
• b) Assertion is correct, reason is correct; reason is not a correct explanation for assertionn
• c) Assertion is correct, reason is incorrect
• d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Question:

• a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
• b) Assertion is correct, reason is correct; reason is not a correct explanation for assertionn
• c) Assertion is correct, reason is incorrect
• d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Question: In nitrogen family, the H-M-H bond angle in the hydrides gradually becomes closer to 90º on going from N to Sb. This shows that gradually

• a) Almost pure p-orbitals are used for M-H bonding
• b) The bond energies of M-H bonds increase
• c) The bond pairs of electrons become nearer to the central atom
• d) The basic strength of the hydrides increases

Answer: Almost pure p-orbitals are used for M-H bonding

Question:  The deep blue colour produced on adding excess of ammonia to copper sulphate is due to presence of

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) N₂O₃
• b) N₂O₅
• c) N₂O
• d) N₂O₄

Answer: N₂O₃

Question: Concentrated nitric acid, upon long standing, turns yellow brown due to the formation of

• a) NO₂
• b) N₂O₄
• c) NO
• d) N₂O

Answer:  NO₂

Question:

• a) N₂O₅
• b) NO₂
• c) N₂O₃
• d) None of these

Answer: N₂O₅

Question: Ammonia on catalytic oxidation gives an oxide from which nitric acid is obtained. The oxide is

• a) NO₂
• b) N₂O₃
• c) NO
• d) N₂O₅

Answer: NO₂

Question: What is the change observed when AgCl reacts with NH₃?

• a) Solution become colourless
• b) White ppt is formed
• c) Yellow ppt is formed
• d) No change is observed

Answer: Solution become colourless

Question:

• a) (ii) and (iv)
• b) (iii) and (iv)
• c) (i) and (iii)
• d) (i) and (v)

Answer: (ii) and (iv)

Question:

• a) Phosphine
• b) White phosphorus
• c) Red phosphorus
• d) Orthophosphoric acid

Answer: Phosphine

Question: Electronegativity of oxygen is more than sulphur yet H₂S is acidic while water is neutral. This is because

• a) H–S bond is weaker than H–O bond
• b) H₂S is gas while H₂O is a liquid
• c) molecular mass of H₂S is more than H₂O
• d) water is highly associated compound

Answer: H–S bond is weaker than H–O bond

Question: It is possible to obtain oxygen from air by fractional distillation because

• a) oxygen has higher b.p. than nitrogen
• b) oxygen is more reactive than nitrogen
• c) oxygen is in a different group of the periodic table from nitrogen
• d) oxygen has a lower density than nitrogen

Answer: oxygen has higher b.p. than nitrogen

Question: Which of the following structures is the most preferred and hence of lowest energy for SO₃

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

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

Answer: (ii) and (iii)

Question: The correct order of the thermal stability of hydrogen halides (H–X) is

• a) HF > HCl > HBr > HI
• b) HI > HCl < HF > HBr
• c) HCl< HF > HBr < HI
• d) HI < HBr > HCl < HF

Answer: HF > HCl > HBr > HI

Question: In the case of alkali metals, the covalent character decreases in the order

• a) MI > MBr > MCl > MF
• b) MF > MCl > MBr > MI
• c) MF > MCl > MI > MBr
• d) MCl > MI > MBr > MF

Answer: MI > MBr > MCl > MF

Question: Which of the following order is/are incorrect regarding the property indicated against it?

• a) (iii) only
• b) (i) and (iii)
• c) (ii) only
• d) (ii) and (iv)

Answer: (iii) only

Question:

• a) X = F , Y = Cl
• b) X = Cl , Y = F
• c) X = Cl , Y = Br
• d) X = I , Y = F

Answer:  X = F , Y = Cl

Question:

• a) All of these
• b) This reaction is used for the manufacture of halates
• c) Oxidation number of Cl decreases as well as increases in this reaction
• d) It is disproportionation reaction

Answer: All of these

Question: Which pair gives Cl₂ at room temperature

• a) Conc. HCl + KMnO₄
• b) NaCl + MnO₂
• c) NaCl + Conc. HNO₃
• d) NaCl + Conc. H₂SO₄

Answer: Conc. HCl + KMnO₄

Question: The elements which occupy the peaks of ionisation energy curve are

• a) He, Ne, Ar, Kr
• b) Na, Mg, Cl, I
• c) Na, K, Rb, Cs
• d) Cl, Br, I, F

Answer:  He, Ne, Ar, Kr

Question: End-product of the hydrolysis of XeF₆ is

• a) XeO₃
• b) XeF₄O
• c) XeF₂O₂
• d) None of these

Answer: XeO₃

Question:

• a) Both
• b) O₂ and Xe have comparable sizes
• c) O₂ and Xe have comparable ionisation energies
• d) None of these

Answer:  Both

Question: What are the products formed in the reaction of xenon hexafluoride with silicon dioxide

• a)

  

• b)

  

• c)

  

• d)

  

Answer: