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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