THE P-BLOCK ELEMENTS Quiz-3

The P-Block Quiz-3

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. “Chlorine-type” laundry bleaches are in reality aqueous solution of

•  HOCl
•  HClO₃
•  NaClO₃
•  NaOCl

Solution
(a) HOCl

Q2. Basic character of fluorides increases in the order

•  XeF₆ < XeF₄ < XeF₂
•  XeF₂ < XeF₄ < XeF₆
•  XeF₂ = XeF₄ < XeF₆
•  XeF₂ > XeF₄ < XeF₆

Solution 

(a) XeF₆ < XeF₄ < XeF₂

Q3   S - S bond is present in

• α-(SO₃)_n
•  γ-(S₃O₉)
•  H₂S₂O₃
•  H₂S₂O₈

Solution

(c)H₂S₂O₃

Q4. An experiment involving absorption of oxygen and its quantitative estimation would involve use of

Caustic Soda

 Pyrogallol

 Conc sulphuric acid

 Turpentine Oil

Solution

(b) Pyrogallol
Pyrogallol dissolves O₂

Q5. Which is/are true statement(s)?

•  Basic nature of X^-is in order F^-Cl^-Br^-I^-
•  HI is strongest acid of HF,HCl,HBr and HI
•  The ionic character of M-X bond decreases in the order M-F > M-Cl > M-Br > M-I
•  All the above are correct statements

Solution

(d)All the above are correct statements

Q6. Ozone layer is being depleted. This is due to

• No emission from supersonic jets
• Chlorofluorocarbon used as aerosols
• Both (a) and (b)
• None of the above

Solution
(c)Both (a) and (b)

Q7. The thermal stability of hydrides of oxygen family is in order

•  H₂Po < H₂Te  < H₂Se  < H₂S  < H₂O
•   H₂Po < H₂O < H₂Te  < H₂Se  < H₂S
•   H₂S < H₂O  < H₂Te  < H₂Se  < H₂Po
•   H₂O < H₂S  < H₂Te  < H₂Se  < H₂Po

Solution

(a) H₂Po < H₂Te  < H₂Se  < H₂S  < H₂O

    

Q8. Consider the following compounds 

I. Na₂S₂O₃    II. Na₂S₄O₆   III. CaOCl₂ 

Among these compounds identify those that have different oxidation states for same type of atoms

 

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

Solution

(d) I , II and III

Q9. The term ‘thio’ is used in the names of all of the following compounds except

•  Na₂S₂O₃ 
•  NaCS₃
•  NaSCN
•  Na₂SO₃

Solution

(d)Na₂SO₃

Q10. Most abundant noble gas in air is

•  He
•  Ne
•  Rn
•  Ar

Solution

(a) He