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
  • $$2CaO+{ 2NH }_{ 4 }Cl\rightarrow 2{ CaCl }_{ 2 }+{ H }_{ 2 }O+{ 2NH }_{ 3 }$$
  • $$CaO+{ NH }_{ 4 }Cl\rightarrow { CaCl }_{ 2 }+{ H }_{ 2 }O+{ NH }_{ 3 }$$
  • $$CaO+{ 2NH }_{ 4 }Cl\rightarrow { CaCl }_{ 2 }+{ H }_{ 2 }O+{ 2NH }_{ 3 }$$
  • $$2CaO+{ NH }_{ 4 }Cl\rightarrow 2{ CaCl }_{ 2 }+{ H }_{ 2 }O+{ 2NH }_{ 3 }$$
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
$$NH_4CI, NH_4NO_3$$ and $$(NH_4)_2CO_3$$ gives $$NH_3$$ 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?
  • $$F_2 > Cl_2 > Br > I_2$$ : Electronegativity
  • $$F_2 > Cl_2 > Br_2 > I_2$$ : Bond dissociation energy
  • $$F_2 > Cl_2 > Br_2 > I_2$$ : Oxidizing power
  • $$HI > HBr > HCl > HF$$ : acidic property in water
Superhalogen is:
  • $$F_2$$
  • $$Cl_2$$
  • $$Br_2$$
  • $$I_2$$
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 :
  • $$XeF_6$$
  • $$XeOF_4$$
  • $$XeF_4$$
  • $$XeO_3$$
Which of the following halide of nitrogen is not explosive in nature?
  • $$NCl_3$$
  • $$NI_3$$
  • $$NBr_3$$
  • $$NF_3$$
Which of the following halide of nitrogen is unstable in nature?
  • $$NCl_3$$
  • $$NBr_3$$
  • $$NI_3$$
  • $$NF_3$$
Xenon reacts with fluorine at 873 K and 7 bar to form $$XeF_4$$. 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 $$H_2O$$
  • $$NH_4Cl$$ with $$NaOH$$
  • $$Cl_2$$ with cold and dil. $$NaOH$$
  • $$Cl_2$$ 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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