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1 PUC Chemistry Objective Question Paper for Students
Which oxide of chlorine is used as a bleaching agent from paper pulp and textiles and in water treatment?
(A) Cl₂O
(B) CIO₂
(C) Cl₂O6
(D) Cl₂O7
Option b – ClO₂
…… A ……. is used in the estimation of carbon monoxide. Her A refers to
(A) I₂O5
(B) I₂O7
(C) BrO₂
(D) BrO3
Option a – I₂O5
Which of the following facts is/are true about chlorine?
(A) It is a greenish-yellow gas.
(B) It has a pungent and suffocating odor.
(C) It is about 2-5 times heavier than air.
(D) All of the above
Option d – All of the above
Chlorine is used in
(A) The extraction of gold and platinum.
(B) Bleaching wood pulp.
(C) Sterilizing drinking water.
(D) All of the above
(D) All of the above
Option d – All of the above
Uses of HCl are
(A) In the manufacturing of chlorine and glucose.
(B) For extracting glue from bones and purifying bone back.
(C) In medicine and as a laboratory agent.
(D) All of the above.
Option d – All of the above
Slaked lime reacts with chlorine to form
(A) Ca(OCI)2
(B) Ca(OCI)CI
(C) Ca(CIO3)2
(D) CaCl₂
Option b – Ca(OCl)Cl
lodine gives blue color with
(A) C₂
(B) F2
(C) Starch solution
(D) FeCl3 solution
Option c – Starch solution
Fluorine reacts with cold dil.NaOH to give
(A) NaF and O₂
(B) NaF and OF2
(C) NaF and H₂O₂
(D) NaF, H₂O2 and F₂O
Option b – NaF and OF2
Iodine reacts with hot conc. solution NaOH to give
(A) Nal + NaOI + O₂
(B) Nal + HIO+ 03
(C) Nal + NalO3 + H₂O
(D) Nal + HIO3 + H₂O
Option c – Nal + NaIO3 + H₂O
Which of the following halic acid and maximum oxidizing strength?
(A) HCIO3
(B) HCIO
(C) HCIO4
(D) HCIO2
Option c – HClO4
Among the oxo-acid of chlorine, the correct order of increasing acid strength is
(A) HCIO4 < HCIO < HCIO₂ < HCIO3
(B) HCIO3 <HCIO2 < HCIO4 < HCIO
(C) HCIO4 < HCIO3 < HCIO₂ < HCIO
(D) HCIO4 < HCIO₂ <HCIO <HCIO3
Option c – HCIO4
The number of chlorine-to-oxygen bonds in Cl₂O7 is
(A) 7
(B) 8
(C) 6
(D) 10
Option b – 8
Which oxide is formed by the reaction of Cl₂ of HgO at 300°C?
(A) CIO2
(B) Cl₂05
(C) Cl₂O3
(D) Cl₂O
Option d – Cl₂O
The acid employed for the etching of glass is
(A) H₂SO4
(B) HCIO4
(C) HF
(D) Aqua regia
Option c – HF
Which of the following is called oxy muriatic acid??
(A) HCI
(B) Cl₂
(C) HBr
(D) HF
Option b – Cl₂
Chlorine is formed when dil.HCl is treated with
(A) KMnO4
(B) MnO₂
(C) K₂Cr₂O7
(D) All of these
Option d – All of these
The hybrid state of Br in BrF5 is
(A) sp³d
(B) sp³d²
(C) sp³
(D) dsp²
Option b – sp³d²
The increasing order of reducing the power of the halogen acids is
(A) HF < HCI < HBr < HI
(B) HF < HBr < HCl < HF
(C) HBr < HCI < HF < HI
(D) HCI < HBr < HF < HI
Option a – HF
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