Important Board Exam Questions: Physics, Chemistry, Biology

Bord Exam Ke Liye Important Questions: Physics, Chemistry, Biology

Congratulations! You're studying for your board exams, and we've got some helpful tips and crucial questions for you to master these subjects—Physics, Chemistry, and Biology.

Physics

• Force and Motion

  • Calculate the acceleration of an object having a mass of 3 kg, moving at a velocity of 5 m/s, when a force of 60 N is applied.

• Work, Energy, and Power

  • Calculate the maximum work that can be done using 1000 J of energy.
  • Determine the power required to lift 50 kg to a height of 100 m in 2 minutes.

• Electricity and Magnetism

  • Explain the principle of the electromagnetic induction and calculate the induced emf in a coil when the magnetic flux changes.
  • Find the magnetic field at a distance of 0.2 m from a wire carrying a current of 2 A, with a length of 1 m and a radius of 0.1 mm.

• Oscillations and Waves

  • Describe the properties of a transverse wave, and find its velocity, given its wavelength and frequency.
  • Sketch the displacement graph of a simple harmonic oscillator and find its amplitude, frequency, and period.

• Optics

  • Derive the lens maker's formula and explain its significance in understanding the properties of lenses.
  • Describe the phenomenon of total internal reflection and find the critical angle for a material with a refractive index of 2.4.

Chemistry

• Atomic Structure and Bonding

  • Write the electron configuration of magnesium and describe its chemical properties.
  • Explain the concept of a resonance structure and its role in understanding the bonding in benzene.

• Stoichiometry and Chemical Equations

  • Balance the following reaction: [2 \text{ NH}_3 + \text{ Cr}_2 \text{O}_7^2- + 4 \text{ H}^+ \rightarrow \text{ N}_2 + 2 \text{ Cr}^3+ + 3 \text{ H}_2\text{O}]

• Gases

  • Calculate the initial rate, final rate, and time taken for a gas to reach equilibrium under a specific reaction condition.
  • Determine the ideal gas equation and use it to find the initial volume of a gas at 300 K and 0.7 moles, given its final volume at 250 K and 0.9 moles.

• Redox Reactions

  • Identify the balanced redox reaction and the oxidation number changes in the following reaction: [2 \text{ Fe} + \text{ SnCl}_4 \rightarrow \text{ Fe}_2\text{Cl}_6 + \text{ Sn}]
  • Describe the concept of electrochemical series and its role in understanding redox reactions.

• Solutions

  • Calculate the solubility product constant (Ksp) and solubility of AgI in water.
  • Distinguish between colligative properties and non-colligative properties, and explain their significance in solution chemistry.

Biology

• Cell Structure and Function

  • Identify the role of the following organelles in a eukaryotic cell: nucleus, endoplasmic reticulum, and mitochondria.
  • Explain the transport processes across cell membranes, using examples of passive, facilitated, and active transport.

• Biological Molecules

  • Explain the structure and function of nucleic acids and their importance in the transmission of genetic information.
  • Describe the structure and functions of proteins, including their role in enzymatic reactions and as structural components.

• Classification, Evolution, and Biodiversity

  • Explain the Linnaean classification system and its role in organizing living beings.
  • Describe the evolution of humans, including the concept of natural selection and genetic drift.

• Ecology

  • Describe the concept of the food chain and its role in maintaining ecosystems.
  • Explain the difference between producers and consumers in an ecosystem and how each group contributes to its stability.

Remember to practice these questions, organize your notes, and seek help from your teachers or classmates when needed. And don't forget to breathe and stay calm during your exams. You got this!