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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 is best performed in an Atmosphere of
a) Xe
b) He
c) Kr
d) O₂
Option b – He
Beacon or signal lights are mainly produced using
a) Hydrogen lamps
b) Xenon lamps
c) Neon lamps
d) Tungsten lamps
Option c – Neon lamps
Noble gases can be isolated and separated by
a) Fractional distillation of liquid air
b) Electrolysis of their compounds
c) Adsorption and desorption on charcoal
d) Both A and B
Option d – Both A and B
A common product of nuclear fusion is
a) Ar
b) He
c) Xe
d) Kr
Option b – He
Monazite is an important source of
a) He
b) Ar
c) Ne
d) Kr
Option a – He
The hybridization of xenon in XeF₂ is
a) sp³
b) sp
c) sp²
d) sp³d
Option a – sp³
Which of the following has the weakest intermolecular forces?
a) H₂O
b) NH₃
c) HCl
d) He
Option d – He
The noble gas with the lowest thermal conductivity at 273 K and 1 atm is
a) He
b) Ne
c) Ar
d) Xe
Option d – Xe
The Molecular geometry of XeF₆ is
a) Pyramidal
b) Linear
c) Distorted octahedral
d) Tetrahedral
Option c – Distorted octahedral
Colored discharge tubes used in advertisements primarily contain
a) Xenon
b) Helium
c) Neon
d) Argon
Option c – Neon
Which of the following molecules is planar?
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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Also, check out:
- Engineering Chemistry by Shashi Chawla
- Darpan Chemistry Class 12
- Balaji Publications Chemistry for NEET
