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Viraf J Dalal Chemistry Class 9. We covered all the Viraf J Dalal Chemistry Class 9 in this post for free so that you can practice well for the exam.
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Viraf J Dalal Chemistry Class 9 Objective for Students
The number of np electrons present in the valence shell of group 17 elements is
a) Five
b) Three
c) Four
d) Seven
Option a – Five
Which of the following groups of elements are called halogens?
a) Li, Na, K
b) F, Cl, Br
c) He, Ne, Ar
d) Cu, Ag, Au
Option b – F, Cl, Br
Which halogen is referred to as a super-halogen?
a) Cl₂
b) Br₂
c) F₂
d) I₂
Option c – F₂
The chemical formula of the mineral carnallite is
a) KCl · MgCl₂ · 6H₂O
b) AgCl · MgBr₂ · 7H₂O
c) NaCl · MgCl₂ · 5H₂O
d) FeSO₄ · (NH₄)₂SO₄ · 7H₂O
Option a – KCl · MgCl₂ · 6H₂O
Which of the following halogens has the highest boiling point?
a) F₂
b) I₂
c) Cl₂
d) Br₂
Option b – I₂
The longest bond length among halogen molecules is observed in
a) F₂
b) Cl₂
c) Br₂
d) I₂
Option d – I₂
Which of the following species contains one lone pair of electrons on the central Atom?
a) IF₃
b) KI
c) ClF₃
d) IF₅
Option d – IF₅
Among interhalogen compounds, the maximum possible number of atoms present in a Molecule is
a) 3
b) 6
c) 7
d) 8
Option d – 8
Which halogen has the highest electron gain enthalpy?
a) Fluorine
b) Chlorine
c) Bromine
d) Iodine
Option b – Chlorine
When hydroiodic Acid is heated with concentrated sulphuric Acid, it produces
a) HIO₃
b) KIO₃
c) I₂
d) KI
Option c – I₂
Which of the following hydrogen halides exists as a liquid at room temperature?
a) HIO₃
b) HBr
c) HCl
d) HF
Option d – HF
The stability order of interhalogen compounds is
a) BrF > IBr > ICl > ClF > BrCl
b) FBr > BrF > ICl > ClF > BrCl
c) ClF > ICl > FBr > IBr > BrF
d) ICl > ClF > BrCl > IBr > BrF
Option c – ClF > ICl > FBr > IBr > BrF
When BrCl reacts with water, the products formed are
a) HBr
b) Br₂ and Cl₂
c) HOBr
d) HOBr and HCl
Option d – HOBr and HCl
Chlorine reacts with excess fluorine to form
a) ClF
b) ClF₃
c) ClF₂
d) Cl₂F₃
Option b – ClF₃
In interhalogen compounds, which halogen never acts as the central Atom?
a) I
b) Cl
c) Br
d) F
Option d – F
Chlorine gas is obtained by electrolysis of ____ and is released at the ____.
a) NaCl, anode
b) Brine, anode
c) Brine, cathode
d) NaCl, cathode
Option b – Brine, anode
A metal M forms chlorides in +2 and +4 oxidation states. Which statement regarding these chlorides is correct?
a) MCl₂ is more volatile than MCl₄
b) MCl₂ is more soluble in anhydrous ethanol than MCl₄
c) MCl₂ is more ionic than MCl₄
d) MCl₂ undergoes greater hydrolysis than MCl₄
Option c – MCl₂ is more ionic than MCl₄
In IF₇, the hybridisation state of iodine is
a) sp³d³
b) dsp³
c) dsp²
d) sp³d²
Option a – sp³d³
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