TS Inter 1st Year Chemistry Question Paper May 2022

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TS Inter 1st Year Chemistry Question Paper May 2022

Section – A

Note: i) Answer ANY TEN questions.
ii) Each Question carries TWO marks.
iii) ALL are very short answer type questions.

Question 1.
What is an Ideal gas?

Question 2.
Which of the gases diffuses faster among N₂,O₂ and CH₄? Why?

Question 3.
State the first law of the thermodynamics.

Question 4.
What is Lewis acid? Give one example.

Question 5.
The empirical formula of a compound is CH₂O. Its molecular weight is 90. Calculate the molecular formula of the compound.

Question 6.
Lithium salts are mostly hydrated. Why?

Question 7.
What are the characteristic colours imparted by the IIA ele-ments?

Question 8.
What is Octat rule?

Question 9.
Which of the two ions Ca²⁺ or Zn²⁺ is more stable and why?

Question 10.
How many Sigma and Pi bonds are present in
(a) C₂H₂ and
(b) C₂H₄?

Question 11.
Which in each pair of elements has a more negative electron gain enthalpy?
a) O or F
b) F or Cl

Question 12.
What is diagonal relation? Giye one pair of elements, that have this relation.

Question 13.
Graphite is a good conductor – explain.

Question 14.
What is allotropy ? Give the crystalline allotropes of carbon.

Question 15.
Write the structures of: Trichloroethanoic acid, Neopentane, p-nitro benzaldehyde.

Section -B

Note : i) Answer ANY SIX questions.
ii) Each Question carries FOUR marks.
iii) ALL are of short answer type questions.

Question 16.
State and explain the Hess’s law of constant Heat summation.

Question 17.
Name the isotopes of hydrogen. What is the ratio of the masses of these isotopes?

Question 18.
Explain the difference between emission and absorption spectra.

Question 19.
What is Hydrogen bond? Explain the different types of Hy-drogen bonds with examples.

Question 20.
Deduce (a) Boyle’s law and (b) Charle’s law from Kinetic gas equation.

Question 21.
Write the postulates of Kinetic Molecular Theory of Gases.

Question 22.
What is lanthanide contraction? What are its consequences?

Question 23.
What are disproportionation reactions? Give example.

Question 24.
Balance the following redox reactions by ion- electron method
MnO₄^–(aq) + SO₂(g) → Mn²⁺(aq)+HSO₄^–(aq) (in acidic solution)

Question 25.
Derive the relation between Kp and Kc for the equilibrium reaction.
N₂₊(g)+3H₂₊(g) ⇌ 2NH₃ (g)

Question 26.
Explain the Arrhenins concept of acids and bases.

Question 27.
What are electron deficient compounds? Is BCI₃ an electron defficient species? Explain.

Question 28.
Why is diamond hard?

Question 29.
Give two examples each for position and functional isomer-ism.

Section – C

Note : i) Answer ANY TWO questions.
ii) Each Question carries EIGHT marks.
iii) ALL are of long answer type questions.

Question 30.
What are the postulates of Bohr’s model of hydrogen atom? Discuss the importance of this model to explain various se-ries of line spectra in hydrogen atom.

Question 31.
What do you understand by Hybridisation? Explain different types of hybridization involving s and p orbitals.

Question 32.
Define IE₁ and IE₂. Why is IE₂ > IE₁ for a given atom? Dis-cuss the factors that effect IE of an element.

Question 33.
Describe two methods of preparation of ethane. Give any three reactions of ethane.