Very Short Questions and Answers on Class 12 Chemistry Chapter 7 p Block Elements | Class 12 Chemistry Chapter 7 p Block Elements Quiz

(1) The forces acting between noble gas atoms are

[A] Vander waals forces

[B] Ion - dipole forces

[C] London - dispersion forces

[D] Magnatic forces

Answer: Vander waals forces

(2) Which of following is correct sequence of noble gas in their group ?

[A] Ar, He, Kr , Ne , Xe, Rn

[B] He, Ar, Ne, Kr, Xe, Rn

[C] He, Ne, Ar, Kr, Xe, Rn

[D] He, Ne, Kr, Ar, Xe, Rn

Answer: He, Ne, Ar, Kr, Xe, Rn

(3) Which of following is noble gas configuration?

[A] 1s²

[B] 1S², 2S²

[C] 1S², 2S² 2P⁶, 3S¹

[D] 1S², 2S² 2P⁶, 3S², 3P⁶, 4S²

Answer: 1s²

(4) Which of following noble gas does not have octate of e - in outer most shell.

[A] Ne

[B] Rn

[C] Ar

[D] He

Answer: Ne

(5) Low chemical reactivity of rate gases can be attributed to their

[A] Being nonmetal

[B] Having High ioni cation energies

[C] Being gases

[D] Found in nature in small quantities

Answer: Having High ioni cation energies

(6) % of Ar in air is;

[A] 1%

[B] 2%

[C] 3%

[D] 4%

Answer: 1%

(7) F. forms chemical compound with

[A] He

[B] Ne

[C] Ar

[D] Xe

Answer: Xe

(8) Last member of inert gas element is

[A] Ne

[B] He

[C] Ar

[D] Rn

Answer: Rn

(9) Which of following is inert gas

[A] H₂

[B] O₂

[C] N₂

[D] Argon

Answer: Argon

(10) Which inert gas show abnormal behavior on liquefaction

[A] Xe

[B] He

[C] Ar

[D] Kr

Answer: He

(11) Inert gas producing max. number of compounds

[A] He & Ne

[B] Ar & Ne

[C] Kr & Ne

[D] Ar & Xe

Answer: Ar & Xe

(12) Helium was discovered by

[A] Crooks

[B] Rutherford

[C] Frankland & Lockyer

[D] Dorn

Answer: Frankland & Lockyer

(13) XeF₄ & XeF₆ are expected to be

[A] Oxidising

[B] Reducing

[C] Un reactive

[D] Strongly basic

Answer: Oxidising

(14) Noble gas forms max. No. of compounds is

[A] Ar

[B] He

[C] Xe

[D] Ne

Answer: Xe

(15) Nuclear Fusion Produces

[A] Ar

[B] Duterium

[C] He

[D] Krypton

Answer: He

(16) Among fluorides, one that does not exists is

[A] XeF₄

[B] HeF₄

[C] SF₄

[D] CF₄

Answer: HeF₄

(17) Last orbit of argon would have ___ e-

[A] 6

[B] 2

[C] 18

[D] 8

Answer: 8

(18) Electronic configuration of neon is

[A] 1S², 2S² 2P²

[B] 1S², 2S² 2P⁶

[C] 1S², 2S²

[D] 1S²

Answer: 1S², 2S² 2P⁶

(19) Which of following noble gas s is least polarizable

[A] Xe

[B] Ar

[C] Ne

[D] He

Answer: He

(20) XeF₆ on hydrolysis gives

[A] XeO₃

[B] XeO

[C] XeO₂

[D] Xe

Answer: XeO₃

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