1st PUC Chemistry Previous Year Question Paper

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

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1st PUC Chemistry Previous Year Objective Question Paper for Students

Welding of magnesium can be done in an atmosphere of

(A) Xe

(B) He

(C) Kr

(D) O2

Option b – He

Beacon lights are obtained from

(A) Hydrogen lamps

(B) Xenon lamps

(C) Neon lams

(D) Tungsten lamps

Option c – Neon lams

The inert gases can be isolated and separated by

(A) Fractional distillation of liquid air

(B) Electrolysis of their compound

(C) Adsorption and desorption on charcoal

(D) Both ‘A’ and ‘B’

Option c – Adsorption and desorption on charcoal

Nuclear fusion products :

(A) Ar

(B) He

(C) Xe

(D) Kr

Option b – He

Monazite is a source of

(A) He

(B) Ar

(C) Ne

(D) Kr

Option a – He

The hybridization of Xe in XeF2 is

(A) sp³

(B) sp

(C) sp²

(D) sp³d

Option a – sp³

Which of the following exhibits the weakest intermolecular forces?

(A) H₂O

(B) NH3

(C) HCI

(D) He

Option d – He

The noble gas shows the least thermal conductivity at 273 K and atmospheric pressure is

(A) He

(B) Ne

(C) Ar

(D) Xe

Option d – Xe

The structure of XeF6 is

(A) Pyramidal

(B) Linear

(C) Distorted octahedral

(D) Tetrahedral

Option c – Distorted octahedral

The colored discharge tubes for an advertisement mainly contain

(A) Xenon

(B) Helium

(C) Neon

(D) Argon

Option c – Neon

Which is a planar molecule?

(A) XeO4

(B) XeF4

(C) XeOF4

(D) XeO₂F₂

Option b – XeF4

We covered all the 1st puc chemistry previous year question paper above in this post for free so that you can practice well for the exam.

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