P-Block Elements MCQs | P-Block Elements Multiple Choice Questions with Answers

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Questions
61 Noble gas do not react with other elements because:
A They are mono atomic
B They are not found in abundance
C The size of their atoms are very small
D They have completely paired up and stable electron shells

Answer: They have completely paired up and stable electron shells
62 Which statement is false?
A Radon is obtained from the decay of radium
B Helium is an inert gas
C The most abundant noble gas in the atmosphere is He
D Xe is the most reactive among the noble gases

Answer: Radon is obtained from the decay of radium
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63 Noble gases can be separated by:
A Passing them through some solution
B Electrolysis of their compounds
C Adsorption and desorption on coconut charcoal
D None of these

Answer: Adsorption and desorption on coconut charcoal
64 In solid state xenon atom are held together by–
A Hydrogen bond
B Vander waal’s forces
C Ionic bonds
D Covalent bond

Answer: Vander waal’s forces
65 The solubility of noble gases in water shows the order:
A He > Ar > Kr > Ne > Xe
B He > Ne > Ar > Kr > Xe
C Xe > Kr > Ar > Ne > He
D None of these

Answer: He > Ar > Kr > Ne > Xe
66 In the compound of type ECl3, where E = B, P, As, or Bi, the angle Cl – E – Cl ofr different E are ion the order :
A B > = P = As = Bi
B B > P > As > Bi
C B < P = As = Bi
D B < P < As < Bi

Answer: B < P = As = Bi
67 When Na2S ia added to sodium nitro prusside solution:
A Beautiful violet colour is produced
B A complex [Fe(CN)5NOS]–4 is formed
C The complex Na4 [Fe(CN)5NOS] is formed
D All

Answer: All
68 Sulphurous anhydride is:
A SO2
B SO3
C HSO3–
D SO3–2

Answer: SO2
69 Which statement is false for ozone?
A It is obtained by silent electric discharge on oxygen
B It is a endothermic compound
C It can be obtained by the action of ultraviolet rays on oxygen
D All of these

Answer: It is a endothermic compound
70 Oxygen can be obtained from bleaching powder by:
A Adding dilute acid
B Passing carbon-di-oxide
C Heating with a cobalt salt
D Adding alkalies

Answer: Heating with a cobalt salt
71 The starting material in birkeland and eyed process for the manufacture of HNO3 is:
A NH3
B NO2
C Air
D Chile saltpetre

Answer: Chile saltpetre
72 Anomalous behavior of nitrogen is due to:
A Small size and high electronegativity
B Non-availability of d-orbital in valency shell
C Ease of multiple bond formation
D All are correct

Answer: All are correct
73 Man dies, when nitrous oxide is inhaled in large quantities because it:
A Is poisonous
B Cause laughing hysteria
C Decomposes haemoglobin
D React with organic tissues

Answer: Cause laughing hysteria
74 Skin tunes yellow in contact with concentrated HNO3 because:
A Proteins are converted into xantho proteins
B Decomposes into two oxides of nitrogen
C Reacts with water to form nitric acid
D Reacts with water to form two acid

Answer: Proteins are converted into xantho proteins
75 NH4Cl is used to clean metal surface because:
A It dissociates NH3 and HCl on heating
B NH3 forms a soluble complex with the metal
C NH4Cl forms a volatile chloride
D None of these

Answer: NH3 forms a soluble complex with the metal

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