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Free download in PDF P-Block Elements Multiple Choice Questions with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like IIT-JEE, NEET, AIIMS etc. These short solved questions or quizzes are provided by Gkseries.
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
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
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
68
Sulphurous anhydride is:
[A]
SO2
[B]
SO3
[C]
HSO3–
[D]
SO3–2
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
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
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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