THE P-BLOCK ELEMENTS Quiz-14

The P-Block Quiz-14

Dear Readers,

IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies. Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything. .

Q1. Molecule(s) possessing two-centre two electron bonds and three centre-four electron bonds would include

•  B₂H₆ and SiF₄
•  XeF₂ and BF₆
•  B₂H₆ and XeF₆
•  B₂H₆

Solution

B₂H₆

Q2.Which of the following is used in vulcanization of rubber?

•  SF₆
•  CF₄
•  Cl₂F₂
•  C₂F₂

Solution
SF₆

Q3.  Alkali ozonides are

•  Paramagnetic in nature
•  Hydrolytically unstable and decompose to superoxides
•  Decreasing in stability as size of alkali metal decreases
•  Having all the above statements as correct

Solution
Having all the above statements as correct

Q4. XeF₂ forms ____ with AsF₅

•  XeF⁺ cation and AsF₄⁺
•  XeF₂^- anion and AsF₄⁺
•  AsF₄⁺ cation and AsF₄^-
•  XeF⁺ cation and AsF₆^-

Solution
XeF⁺ cation and AsF₆^-

Q5.In the presence of H₂O, SO₂ acts as

•  An oxidising agent
•  A reducing agent
•  A hydrolyzing agent
•  A redox agent

Solution
A reducing agent

Q6. Which one will liberate Br₂ from KBr?

• I₂
• SO₂
• HI
• Cl₂

Solution
Cl₂

Q7. Iodine test is shown by

•  Glucose
•  Starch
•  Glycogen
•  Polypeptide

Solution
Starch

Q8.In the preparation of HBr or HI,NaX (X=Br,I) is treated with H₃PO₄ and not by conc. H₂SO₄ and since

•  H₂SO₄ makes the reaction reversible
•  H₂SO₄ oxidises HX to X₂(Br,I)
•  Na₃PO₄ is water soluble
•  Na₂SO₄ is water soluble

Solution
H₂SO₄ oxidises HX to X₂(Br,I)

Q9.Which of the following species have undistorted octahedral structures?
I. SF₆
II. PF₆^-
III. SiF₆^2-
IV. SeF₆

•  II, III and IV
•  I, III and IV
•  I, II and III
•  I, II and IV

Solution
I, II and IV

Q10. The gas not absorbed by coconut charcoal is

•  He
•  Ne
•  Ar
• He

Solution
Ar