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Laxmi Publications Chemistry Class 12. We covered all the Laxmi Publications Chemistry Class 12 in this post for free so that you can practice well for the exam.
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Laxmi Publications Chemistry Class 12 Objective for Students
In the OF₂ Molecule, the total number of Bonding electron pairs and lone electron pairs respectively is
a) 2, 8
b) 2, 6
c) 2, 9
d) 2, 10
Option a – 2, 8
One-word answers are given below. Identify the incorrect statement.
a) The allotrope of sulphur that is most stable at room temperature – Rhombic
b) The group 16 hydride that exists as a liquid at room temperature – Water
c) The gas produced in the upper Atmosphere due to UV radiation – N₂
d) The catalyst used in the contact process for manufacturing sulphuric Acid – V₂O₅
Option c – The gas produced in the upper Atmosphere due to UV radiation – N₂
The reaction of H₂SO₄ with PCl₅ produces
a) Thionyl chloride
b) Sulphur monochloride
c) Sulphur chloride
d) Sulphur ultrachloride
Option c – Sulphur chloride
Ozone depletion over Antarctica occurs due to the formation of
a) Acrolein
b) Peroxyacetyl nitrate
c) SO₂ and SO₃
d) Chlorine nitrate
Option d – Chlorine nitrate
When sulphur dioxide gas is passed through an acidified potassium dichromate solution
a) The solution turns blue
b) The solution becomes colourless
c) SO₂ undergoes reduction
d) Green Cr₂(SO₄)₃ is formed
Option d – Green Cr₂(SO₄)₃ is formed
Hydrogen sulphide reacts with lead acetate to give a black compound, which on treatment with hydrogen peroxide forms another compound. The colour of this compound is
a) Black
b) Yellow
c) White
d) Pink
Option c – White
The hybridisation of sulphur in SF₆ is
a) sp³d²
b) sp³d
c) sp³d³
d) sp³
Option a – sp³d²
The hybridisation of sulphur in SF₄ is
a) sp³d²
b) sp³d
c) sp³
d) sp²d
Option b – sp³d
The chemical formula of baryte, a sulphur-containing mineral, is
a) CaSO₄·2H₂O
b) MgSO₄·7H₂O
c) BaSO₄
d) CuFeS₂
Option c – BaSO₄
Peroxodisulphuric Acid is commonly known as
a) Caro’s Acid
b) Marshall’s Acid
c) Sulphurous Acid
d) Dithionic Acid
Option b – Marshall’s Acid
Which of the following Metals reacts with concentrated sulphuric Acid?
a) Au
b) Ag
c) Pt
d) Pb
Option d – Pb
When sulphur dioxide is passed through bromine water, the products formed are
a) H₂SO₄ and HBr
b) H₂O and HBr
c) Sulphur and water
d) HBr and sulphur
Option b – H₂O and HBr
The photosensitive elements of group 16 are
a) Oxygen and sulphur
b) Oxygen and tellurium
c) Selenium and tellurium
d) Sulphur and selenium
Option c – Selenium and tellurium
In the laboratory preparation of dioxygen by heating potassium chlorate, the catalyst used is
a) Iron filings
b) Manganese dioxide
c) Platinum
d) Copper chloride
Option b – Manganese dioxide
The hybridisation of the oxygen Atom in a water Molecule is
a) sp
b) sp²
c) sp³
d) sp³d
Option c – sp³
Oleum is chemically represented as
a) H₂SO₃
b) H₂SO₅
c) H₂S₂O₇
d) H₂S₂O₈
Option c – H₂S₂O₇
Caro’s Acid has the formula
a) H₂SO₃
b) H₃S₂O₅
c) H₂SO₅
d) H₂S₂O₈
Option c – H₂SO₅
When hydrogen sulphide reacts with oxygen, the products formed are
a) Water and sulphur
b) Water and sulphur dioxide
c) Water and sulphur trioxide
d) Sulphuric Acid and sulphur
Option a – Water and sulphur
We covered all the laxmi publications Chemistry Class 12 above in this post for free so that you can practice well for the exam.
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