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Chapters
2: Solutions
3: Ionic Equilibria
4: Chemical Thermodynamics
5: Electrochemistry
6: Chemical Kinetics
▶ 7: Elements of Groups 16, 17 and 18
8: Transition and Inner transition Elements
9: Coordination Compounds
10: Halogen Derivatives
11: Alcohols, Phenols and Ethers
12: Aldehydes, Ketones and Carboxylic acids
13: Amines
14: Biomolecules
15: Introduction to Polymer Chemistry
16: Green Chemistry and Nanochemistry
![Balbharati solutions for Chemistry [English] 12 Standard HSC chapter 7 - Elements of Groups 16, 17 and 18 - Shaalaa.com](/images/chemistry-english-12-standard-hsc_6:74400b801d4c44ef8e058ff9d9dfe964.jpg "Balbharati solutions for Chemistry [English] 12 Standard HSC chapter 7 - Elements of Groups 16, 17 and 18")
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Solutions for Chapter 7: Elements of Groups 16, 17 and 18
Below listed, you can find solutions for Chapter 7 of Maharashtra State Board Balbharati for Chemistry [English] 12 Standard HSC.
Balbharati solutions for Chemistry [English] 12 Standard HSC 7 Elements of Groups 16, 17 and 18 Exercises [Pages 163 - 164]
Select appropriate answers for the following.
Which of the following has highest electron gain enthalpy?
Fluorine
Chlorine
Bromine
Iodine
Select appropriate answers for the following.
Hydrides of group 16 are weakly acidic. The correct order of acidity is ______.
H2O > H2S > H2Se > H2Te
H2Te > H2O > H2S > H2Se
H2Te > H2Se > H2S > H2O
H2Te > H2Se > H2O > H2S
Select appropriate answers for the following.
Which of the following element does not show an oxidation state of +4?
O
S
Se
Te
Select appropriate answers for the following.
HI acid when heated with conc. H2SO4 forms _______.
HIO3
KIO3
I2
KI
Ozone layer is depleted by ______.
NO
NO2
NO3
N2O5
Select appropriate answers for the following.
Which of the following occurs in a liquid state at room temperature?
HIO3
HBr
HCl
HF
Select appropriate answers for the following.
In pyrosulfuric acid oxidation state of sulfur is _______.
only +2
only +4
+2 and +6
only +6
Select appropriate answers for the following.
Stability of interhalogen compounds follows the order _______.
BrF > IBr > ICl > ClF > BrCl
IBr > BeF > ICl > ClF > BrCl
ClF > ICl > IBr > BrCl > BrF
ICl > ClF > BrCl > IBr > BrF
Select appropriate answers for the following.
BrCl reacts with water to form _______.
HBr
Br2 + Cl2
HOBr
HOBr + HCl
Select appropriate answers for the following.
Chlorine reacts with excess of fluorine to form _______.
CIF
CIF3
CIF2
Cl2F3
In interhalogen compounds, which of the following halogens is never the central atom?
I
Cl
Br
F
Select appropriate answers for the following.
Which of the following has one lone pair of electrons?
IF3
ICl
IF5
ClF3
Select appropriate answers for the following.
In which of the following pairs, molecules are paired with their correct shapes?
[I3]– : bent
BrF5 : trigonal bipyramidal
ClF3 : trigonal planar
[BrF4]- : square planar
Select appropriate answers for the following.
Among the known interhalogen compounds, the maximum number of atoms is _______.
3
6
7
8
Answer the following.
Write the order of the thermal stability of the hydrides of group 16 elements.
Answer the following.
What is the oxidation state of Te in TeO3?
Answer the following.
Name two gases which deplete ozone layer.
Answer the following.
Give two uses of ClO2.
Answer the following.
What is the action of bromine on magnesium metal?
Answer the following.
Write the names of allotropic forms of selenium.
Answer the following.
What is the oxidation state of ‘S’ in H2SO4?
Answer the following.
The pKa value of HCl is - 7.0 and that of HI is -10.0. Which is the stronger acid?
Answer the following.
Give one example showing reducing property of ozone.
Write the reaction of conc. \[\ce{H2SO4}\] with sugar.
Write any two uses of Chlorine.
Complete the following.
\[\ce{ICl3 + H2O -> \underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{} + ICl}\]
Complete the following.
l2 + KClO3 → _______ + KIO3
Complete the following.
BrCl + H2O → _______ + HCl
Complete the following.
Cl2 + ClF3 → _______
Complete the following.
H2C = CH2 + ICl → _______
Complete the following.
2XeOF4 + SiO2 → _______ + SiF4
Complete the following.
\[\ce{XeF6 + 6H2O -> \underline{}\underline{}\underline{}\underline{} + HF}\]
Complete the following.
\[\ce{XeOF4 + H2O -> \underline{}\underline{}\underline{}\underline{} + HF}\]
Match the following:
| A | B |
| XeOF2 | Xenon trioxydifluoride |
| XeO2F2 | Xenon monooxydifluoride |
| XeO3F2 | Xenon dioxytetrafluoride |
| XeO2F4 | Xenon dioxydifluoride |
What is the oxidation state of xenon in the following compounds?
XeOF4, XeO3, XeF6, XeF4, XeF2.
Answer the following.
The first ionization enthalpies of S, Cl, and Ar are 1000, 1256 and 1520 kJ/mol-1, respectively. Explain the observed trend.
Answer the following.
Acidic character of hydrides of group 16 elements increases from H2O to H2Te. Explain.
How is dioxygen prepared in the laboratory from KClO3?
What happens when lead sulfide reacts with ozone \[\ce{O3}\]?
Answer the following.
What happens when nitric oxide reacts with ozone.
Answer the following.
Give two reactions showing the oxidising property of concentrated H2SO4.
Discuss the structure of sulfur dioxide.
Fluorine shows only –1 oxidation state while other halogens show –1, +1, +3, +5 and +7 oxidation states. Explain.
Answer the following.
What is the action of chlorine on Fe?
Answer the following.
What is the action of chlorine on Excess NH3.
Answer the following.
How is hydrogen chloride prepared from sodium chloride?
Answer the following.
Draw structures of XeF6
Answer the following.
Draw structures of XeO3
Answer the following.
Draw structures of XeOF4
Answer the following.
Draw structures of XeF2
What are interhalogen compounds?
Give two examples of interhalogen compounds.
What is the action of hydrochloric acid on NH3?
What is the action of hydrochloric acid on Na2CO3?
Answer the following.
Give two uses of HCl.
Write the names and structural formulae of oxoacids of chlorine.
Answer the following.
What happens when Cl2 reacts with F2 in equal volume at 437 K.
Answer the following.
What happens when Br2 reacts with excess of F2.
Answer the following.
How are xenon fluorides XeF2, XeF4 and XeF6 obtained? Give suitable reactions.
Answer the following.
How are XeO3 and XeOF4 prepared?
Answer the following.
List the uses of Neon and argon gases.
Answer the following.
Describe the structure of the Ozone. Give two uses of ozone.
Explain the trend in following atomic properties of group 16 elements:
Atomic radii
Answer the following.
Explain the trend in following atomic properties of group 16 elements:
Ionisation enthalpy
Explain the trend in following atomic properties of group 16 elements:
Electronegativity
Answer the following.
Distinguish between rhombic sulfur and monoclinic sulfur.
Answer the following.
Give two reactions showing the oxidising property of concentrated H2SO4.
How is SO2 prepared in the laboratory from sodium sulfite?
Describe the manufacturing of H2SO4 by the contact process.
Solutions for 7: Elements of Groups 16, 17 and 18
Balbharati solutions for Chemistry [English] 12 Standard HSC chapter 7 - Elements of Groups 16, 17 and 18
Shaalaa.com has the Maharashtra State Board Mathematics Chemistry [English] 12 Standard HSC Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Balbharati solutions for Mathematics Chemistry [English] 12 Standard HSC Maharashtra State Board 7 (Elements of Groups 16, 17 and 18) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
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Concepts covered in Chemistry [English] 12 Standard HSC chapter 7 Elements of Groups 16, 17 and 18 are Occurrence of Elements of Groups 16, 17 and 18, Electronic Configuration of Elements of Group 16, 17 and 18, Atomic and Physical Properties of Elements of Group 16, 17 and 18, Anomalous Behaviour of Oxygen, Anomalous Behaviour of Fluorine, Chemical Properties of Elements of Groups 16, 17 and 18, Oxoacids, Oxygen and Compounds of Oxygen, Chlorine, Concept of Group 18 Elements.
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