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CBSE Questions for Class 12 Engineering Chemistry The P-Block Elements Quiz 9 - MCQExams.com

The diagram below shows the set up for the laboratory preparation of a pungent alkaline gas.
The balanced equation for the above preparation is :
202353_b95d70bc85954638ba16dbeae3d5d036.png
  • 2CaO+2NH4Cl2CaCl2+H2O+2NH3
  • CaO+NH4ClCaCl2+H2O+NH3
  • CaO+2NH4ClCaCl2+H2O+2NH3
  • 2CaO+NH4Cl2CaCl2+H2O+2NH3
Which reaction of ammonia forms the first step of Ostwald's process?
  • The catalytic oxidation of ammonia by platinum catalyst
  • The catalytic oxidation of ammonia by cobalt catalyst
  • The catalytic reduction of ammonia by platinum catalyst
  • The oxidation of ammonia

The set up shown in the diagram is for the laboratory preparation of a pungent alkaline gas. What is the name of drying agent used in the process?

202664_64a8d6fb2dcd4b1eb3294530152fcd56.png
  • Quick lime
  • Magnesium oxide
  • Calcium carbonate
  • None of these

The set up shown in the diagram is for the laboratory preparation of a pungent alkaline gas. The gas collected in the jar is _________ .

202348_c47eeca8f7e147559e18fada0c0242a3.png
  • ammonia
  • chlorine
  • sulfur dioxide
  • carbon monoxide
Which of the following pairs is/are correctly matched?
  • A halogen which is liquid at room temperature - Bromine
  • The most electronegative element - Fluorine
  • The most reactive halogen - Fluorine
  • The strongest oxidizing agent - Iodine
NH4CI,NH4NO3 and (NH4)2CO3 gives NH3 gas on heating.
  • True
  • False
One mole of magnesium nitride on reaction with an excess of water gives:
  • one mole of ammonia
  • one mole of nitric acid
  • two moles of ammonia
  • two moles of nitric acid
Which one of the following order is not in accordance with the property stated against it?
  • F2>Cl2>Br>I2 : Electronegativity
  • F2>Cl2>Br2>I2 : Bond dissociation energy
  • F2>Cl2>Br2>I2 : Oxidizing power
  • HI>HBr>HCl>HF : acidic property in water
Superhalogen is:
  • F2
  • Cl2
  • Br2
  • I2
Nitrogen gas can be obtained by heating :
  • ammonium nitrate
  • ammonium nitrite
  • magnesium nitride
  • ammonium chloride
What is found in sulphide ores?
  • Phosphorous
  • Bismuth
  • Antimony
  • Arsenic
An element with atomic number 82 belongs to the group:
  • 16
  • 12
  • 14
  • 2
Which metal is in ores such as orpiment, realgar etc?
  • phosphorous
  • arsenic
  • nitrogen
  • bismuth
Hydride of nitrogen is:
  • acidic
  • basic
  • neutral
  • none of the above
The atomic number of some elements are as given. Which of the following elements belong to the nitrogen family?
  • element of atomic number 33
  • element of atomic number 51
  • element of atomic number 83
  • all of the above
The Xenon compound which has more number of lone pairs in its central atom is :
  • XeF6
  • XeOF4
  • XeF4
  • XeO3
Which of the following halide of nitrogen is not explosive in nature?
  • NCl3
  • NI3
  • NBr3
  • NF3
Which of the following halide of nitrogen is unstable in nature?
  • NCl3
  • NBr3
  • NI3
  • NF3
Xenon reacts with fluorine at 873 K and 7 bar to form XeF4. In this reaction the ratio of Xenon and fluorine required is :
  • 1:5
  • 10:1
  • 1:3
  • 5:1
Which of the following elements does not forms stable diatomic molecules :
  • I
  • P
  • N
  • O
Which of the following element has metallic lustre?
  • F
  • Cl
  • Br
  • I
NaOCl is used as a bleaching agent and sterilising agent. It can be prepared by the action of:
  • NaCl with H2O
  • NH4Cl with NaOH
  • Cl2 with cold and dil. NaOH
  • Cl2 with hot and conc. NaOH
Which compounds is related to Haber's process:
  • CO_2
  • H_2
  • NO_2
  • NH_3
Which of the following P  most stable?
  • Red
  • White
  • Black
  • All of these
When plant and animal decay, the organic N is converted into inorganic N. The inorganic N is in the form of:
  • NH_3
  • element of N
  • nitrates
  • nitrides
In an organic compound P is estimated as:
  • Mg_{2}P_2O_7
  • Mg_3(PO_4)_2
  • H_3PO_4
  • P_2O_5
The three important oxidation state of P are:
  • -3,+3,+5
  • -3,+3,-5
  • -3,+4,-4
  • -3,+3,+4
Formula of Freon is:
  • CCl_2F_2
  • COCl_2
  • SO_2Cl_2
  • none of these
Cyanamide process is used in formation of-
  • N_2
  • HNO_3
  • NH_3
  • PH_3
Among the following halogens, the one which does not form an oxyacid is:
  • Fluorine
  • Chlorine
  • Bromine
  • Iodine
Which of the following does not contain nitrogen?
  • Proteins in plants and animals
  • Members of apatite family
  • Indian saltpetre
  • Chile saltpetre
Which of the following gives purest form of nitrogen?
  • Thermal decomposition of ammonium nitrate
  • Treating aqueous solution of ammonium chloride with sodium nitrite
  • Thermal decomposition of sodium or barium azide
  • Liquefaction and fractional distillation of air
Chlorine water oxidises thiosulphates to:
  • sulphate
  • persulphate
  • sulphide
  • none of these
The impurities formed during laboratory preparation of dinitrogen from ammonium chloride and sodium nitride is/are:
  • HCl
  • HNO_3  and NO
  • NO_2
  • HNO_2
The single X-X bond made by N is weaker than that of P because:
  • of repulsion between nitrogen nucleus due to smaller size of nitrogen atom
  • of repulsion between non-bonded electrons due to smaller size of nitrogen atom
  • of higher bond enthalpy of nitrogen
  • all of the above
The multiple bonds that nitrogen forms with itself are:
  • d\pi-d\pi bonds
  • d\pi-p\pi bonds
  • p\pi-p\pi bonds
  • none of the above
What results in the weak catenation property of nitrogen?
  • Smaller size
  • Repulsion between non-bonded electrons
  • Repulsion between protons
  • High electronegativity
Which of the following does exist?
  • HFO_2
  • HClO_2
  • HBrO_2
  • HIO_2
Which of the following can produce ammonia from ammonium salts?
  • Quick lime
  • Caustic soda
  • slaked lime
  • All
The complex formed in Brown Ring Test is ___________.
  • [Fe(H_2O)_4(NO)_2]^{2+}
  • [Fe(H_2O)_5(NO)]^{2+}
  • [Fe(H_2O)_3(NO)_3]^{2+}
  • [Fe(H_2O)_6(NO)]^{2+}
Urea on reacting with water gives:
  • NH_3
  • N_2O_3
  • HNO_2
  • HNO_3
Nitrogen can combine with:
  • only metals
  • only non-metals
  • both metals and non-metals
  • neither metals nor non-metals
Make the correct pairs for the following given X and Y. X contains substance and Y has method of manufacture:

X
Y
Extraction of Sulphur
p. Contact process
Production of Nitric acid
q. Frasch method
Production of Sulphuric acid
r. Haber's process
Production of Ammonia gas
s. Ostwald's process
  • (1- s), (2- r), (3- q), (4- p)
  • (1- r), (2- q), (3- s), (4-p)
  • (1-q), (2-s), (3-p), (4-r)
  • (1-s), (2-q), (3-r), (4-p)
Which of the following is true regarding derivation of the name of chlorine?
  • The name of chlorine was derived from its color.
  • The name of chlorine was derived from the name of the place where it was found for the first time.
  • The name of chlorine was derived from the name of the scientist who discovered it.
  • The name of chlorine was derived from mythological character name.
N_2(g)+3H_2(g)\overset{773K}{\underset{200-300\ bar}{\longrightarrow}}2NH_3(g)+ heat 

Which of the following works as a catalyst?
  • Al_2O_3
  • K_2O
  • Fe
  • V_2O_5
When 262\ g of xenon (atomic mass = 131) reacted completely with 152\ g of fluorine (atomic mass = 19), a mixture of XeF_{2} and XeF_{6} was produced. The molar ratio XeF_{2} : XeF_{6} is :
  • 1 : 2
  • 1 : 4
  • 1 : 1
  • 1 : 3
Which element among the following does form P \pi- P \pi multiple bonds ?
  • Arsenic
  • Nitrogen
  • Phosphorus
  • Antimony
Which property is most important in making fluorine, the strongest oxidising halogen?
  • Hydration enthalpy
  • Bond dissociation energy
  • Ionisation enthalpy
  • Electron gain enthalpy
Which of the following is not a peroxy acid?
  • Perphosphoric acid
  • Pernitric acid
  • Perdisulphuric acid
  • Perchloric acid
Helium is used in balloons in place of hydrogen because it is:
  • Incombustible
  • Lighter than hydrogen
  • Radioactive
  • More abundant than hydrogen
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