TS Inter 1st Year Chemistry Question Paper March 2023

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TS Inter 1st Year Chemistry Question Paper March 2023

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 Biochemical Oxygen Demand (BOD)?

Question 2.
What happens when magnesium metal is burnt in air?

Question 3.
Describe the important uses of sodium carbonate.

Question 4.
Why pressure Cooker is used for cooking food on hills?

Question 5.
Give the hybridization of carbon in
a) CO₃,^-2
b) diamond
c) graphite
d) fullerene

Question 6.
What is PAN? What effect is caused by it?

Question 7.
The empirical formula of a compound is CH₃O. Its molecular weight is 90. Calculate the molecular formula of the compound.

Question 8.
All Lewis acids are not Bronsted acids. Why?

Question 9.
Diamond has high melting point – explain.

Question 10.
Write the IUPAC names of:
a) CH₃-CH₂-CH₂-CH=CH₂

Section – B

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

Question 11.
State Fajan’s rules, and give suitable examples.

Question 12.
Deduce (a) Boyle’s law and (b) Charle’s law from Kinetic gas equation.

Question 13.
State and explain tbe Hess’s law of constant Heat summa-tion

Question 14.
Derive the relation between K and K for the equilibrium reaction
N₂(g) + 3H₂ (g) ⇌ 2NH₃ (g)

Question 15.
Balance the following redox reaction by ion – electron method:
MnO₄^–(aq)+ SO₂(g) → Mn²⁺(aq) + HSO₄^– (aq) (in acidic solution)

Question 16.
Explain the hybridization involved in SF₆ molecule.

Question 17.
Write a few lines on the utility of hydrogen as a fuel.

Question 18.
Explain borax bead test with a suitable example.

Section – C

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

Question 19.
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 20.
Define IE₁ and IE₂. Why is IE₂ > IE₁ for a given atom? Dis-cuss the factors that effect IE of an element.

Question 21.
How does acetylene react with the following reagents? Give the corresponding equations and name the products formed in the reactions.
a) Water
b) Hydrogen
c) Halogens
d) Hydrogen halide