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1 PUC Chemistry Question Paper

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1 PUC Chemistry Question Paper. We covered all the 1 PUC Chemistry Question Paper in this post for free so that you can practice well for the exam.

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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 is a major rivers in Bangladesh which is also the main distributary of the Ganges?

(A) Gandak

(B) Kosi

(C) Gomati

(D) Padma

Show Answer

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

Which of the following is the leading producer of rice?

(A) Australia

(B) Argentina

(C) China

(D) Cuba

Show Answer

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


(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?





Option c – HClO4

Among the oxo-acid of chlorine, the correct order of increasing acid strength is





Option c – HCIO4 < HCIO3 < HCIO₂ < HCIO

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


(C) HF

(D) Aqua regia

Option c – HF

Which of the following is called oxy muriatic acid??


(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 < HCI < HBr < HI

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