HSC Science (General)
HSC Science (Electronics)
HSC Science (Computer Science)
Academic Year: 2024-2025
Date & Time: 1st July 2025, 11:00 am
Duration: 3h
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General Instructions:
The question paper is divided into four sections.
- Section A: Q. No. 1 contains Ten multiple choice type of questions carrying One mark each. Only the first attempt will be considered for evaluation.
Q. No. 2 contains Eight very short answer type of questions carrying One mark each. - Section B: Q. No. 3 to Q. No. 14 are Twelve short answer type-I questions carrying Two marks each. (Attempt any Eight)
- Section C: Q. No. 15 to Q. No. 26 are Twelve short answer type-II questions carrying Three marks each. (Attempt any Eight)
- Section D: Q. No. 27 to Q. No. 31 are Five long answer type of questions carrying Four marks each. (Attempt any Three)
- Use of log table is allowed. Use of calculator is not allowed.
- Figures to the right indicate full marks.
- Given data:
- R = 8.314 J K−1 mol−1
- At. Wt. of Oxygen = 16
- NA = 6.022 × 1023
- 1 F = 96500°C
The coordination number of atoms in bcc crystal lattice is ______.
2
4
6
8
Chapter: [1] Solid State
The unit of Henry’s Law constant is ______.
mol L−1 bar−1
mol−1 L bar−1
mol L−1 bar
mol−1 L−1 bar−1
Chapter:
Ideal gas expands isothermally from 20 dm3 to 25 dm3 at constant pressure of 1.5 bar; then work done in dm3 bar will be ______.
−1.5
−5
−7.00
−7.5
Chapter:
Correct statement about electrolysis of aqueous NaCl is ______.
H2 gas liberated at cathode.
Cl2 gas liberated at cathode.
H2 gas liberated at anode.
O2 gas liberated at anode.
Chapter:
Rate constant of reaction is mole dm−3 sec−1, the order of reaction will be ______.
Zero
one
1.5
2
Chapter:
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The correct possible general formula for interhalogen compound in the following is:
`XX_2^'`
`XX_3^'`
`XX_4^'`
`XX_6^'`
Chapter:
All radioactive elements are present in which of the following:
3d series
4d series
Actinoid series
Lanthanoid series
Chapter:
The metal used in preparation of Grignard reagent is ______.
Al
Mg
Na
Fe
Chapter:
Which among the following is dicarboxylic acid?
Acetic acid
Phthalic acid
Caproic acid
Citric acid
Chapter:
Write the formula to calculate the % atom economy.
Chapter: [16] Green Chemistry and Nanochemistry
Write the structure and name of the monomer of Nylon-6.
Chapter: [15] Introduction to Polymer Chemistry [15] Polymers
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Write the total number of chiral carbon atoms present in glucose.
Chapter:
Complete the following reaction:
\[\begin{array}{cc}
\ce{O}\phantom{......................................................}\\
||\phantom{......................................................}\\
\ce{CH3 - C - NH2 + 4(H) ->[Na/C2H5OH][LiAlH4, ether(H3O)^\oplus] ? + H2O}\
\end{array}\]
Chapter:
Write the name of the reagent used to convert phenol to Benzene.
Chapter:
Write oxidation state of ‘Fe’ in \[\ce{[Fe(CN)6]^{4\ominus}}\] complex ion.
Chapter:
Write 6.0 g of O2 reacts with ClF as per
\[\ce{2ClF_{(g)} + O2_{(g)} -> Cl2O_{(g)} + OF2_{(g)}}\]
The enthalpy change is 38.55 kJ. Calculate the standard enthalpy of the reaction.
Chapter:
When gold crystallizes, it forms face-centered cubic cells. The unit cell edge length is 4 × 10−8 cm. Calculate the density of gold. Molar mass of gold is 197 g mol−1.
Chapter:
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