12th Grade Physics and Chemistry Test

• This is a test booklet for the LEADER Test Series / JOINT PACKAGE COURSE, designed for 12th-grade students who are undergoing or have passed their 12th-grade studies
• The test is Section-1 of Major Test # 01 and covers the 11th Class Syllabus
• There are 48 pages in total
• It covers a range of topics including Physics and Chemistry

Instructions

• The Answer Sheet must be filled with a blue/black ballpoint pen
• The test will be 3 hours and 20 minutes long with 200 questions
• Each question is worth 4 marks, with 1 mark deducted for each incorrect response
• The maximum possible score is 720
• Each subject contains two sections
• Section A has 35 mandatory questions
• Section B has 15 questions, with candidates able to attempt any 10
• If more than one answer is correct, select the most accurate one
• Use blue/black ballpoint pen only for marking
• Utilize the designated space in the Test Booklet for rough work
• The Answer Sheet must be submitted before exiting the room/hall, while the Test Booklet can be taken
• Answer Sheets mustn't be folded or have any stray marks
• Form Numbers are to be written in the specified area
• White fluid isn't allowed

Physics: Basic principles

• The equation to the given curve can be "y = – 3x2 – 5"
• Force is 100 dynes in the CGS system
• The magnitude of the force is 0.036 if kilogram, meter, and minute are fundamental units
• The dimensional formula for mass is [E1V-2T0] if energy (E), velocity (V), and time (T) were chosen as fundamental physical quantities
• Know to calculate true value with vernier scales

Physics: River Motion

• For a boatman to row his boat directly opposite a river's current, they must travel at a right angle to the stream

Physics: Dynamics

• The retardation of a block projected upwards on a rough incline at 45° with a friction coefficient of 0.5 is 3g/2root2
• The reading on a weighing machine for a 50 kg person inside a lift accelerating upwards at 6 m/s² on an inclined plane of 60° is 80 kg-wt
• For an ideal massless spring balance, know how to relate measure values to calculate the force
• An unbanked curve with a radius of 60 m has a maximum safe speed of 21 m/s with a coefficient of static friction being 0.75
• For 1.0 kg ball vertically falls on floor at 25 cm, and rebounds to 4 cm. The coefficient of restitution for the collision is 0.40

Physics: Torque

• Initial angular acceleration is 3F/2ML, where M is mass and L is length
• For A uniform cube of height a, the minimum value of external force F must be F=2/3mg

Physics: Thermal expansion

• Can calculate stress using linear expansion of steel
• In a thermodynamic process, if 26400 J heat is put onto a 2 kg block material (specific heat of aluminium), raising temperate from 20°C to 35°C, we see that specific heat is ~880J/kgK
• When 10g of ice at 0°C is mixed with 40g of water at 15°C then temperature of mixture is 0C

Physics: Thermodynamics

• The temperature of a junction of three rods joined together will be 45C
• The amount of heat required to raise the temperature of 1 mole of diatomic gas from 20°C to 25°C at constant pressure Q is 7Q/10
• Understanding of isothermic processes
• Terminal velocity can be calculated with air resistance

Physics: Waves

• Pressure inside a water drop is 240Nm-2
• If volume of block of aluminium, stress increases to 7.5 x 10^8 Nm-2
• Simple pendulum: its time period will decrease by 1% if simple pendulum lifted 64 km from surface
• The energy of moving of body of mass m from an orbit of radius 4R to 6R is GMm/24R
• Velocities of radius 9R and 16R respectively have ratio of 3 : 4
• It covers topics such as thermodynamics

Physics: SHM and Sound

• For Simple Harmonik Motion time T1 and T 2 have a relation T2 = 2T1
• The relationship between frequency, time, and distance can be written, as well as the speed of sound

Physics: Wave optics and tension

• For wave optics, intensity of sound
• For tension, calculating force of vibrating string

Mechanics section B questions

• Find the force of to bodies knowing the angle
• Calculate time and velocity given forces

Chemistry Topics:

• Structure of Atom
• Classification of Element and Periodicity in properties
• Chemical bonding and molecular structure
• Equilibrium
• Some basic concepts of chemistry
• Thermodynamics
• Organic Chemistry : Some basic principles and techniques
• Redox reactions
• Hydrocarbons: Alkanes, Alkenes, Alkynes, Aromatic Hydrocarbons.

Chemistry

• Value of the angular velocity of the electron in the n orbit of Bohr hydrogen atom is inversly proportional to n^2
• Wavelenght for Second line of balmer series is 16/3R
• The value of K = 4.24 at 800K for the reaction
• CO(g) + H2O(g) = CO2(g) + H2(g) then the equilibrium concentration ratio of CO(g) & CO2(g) is 1/rootKp
• For a pH of 0.1M solution of a salt, can deduce some information about hydrolysis pH of the salt solution
• Correct order of acidic strength are:
  • CH3-CH3 > CH2 ==CH2 > CH ==CH

Chemistry: Organic

• Benzenoid aromatic compound
• Which of the following have least tendency to form their conjugate acid:
  • CH3-C==NH2 O
• Benzene cannot formed by C6H5MgBr with CH3CH2OH

Botany

• A test booklet comprising questions from botany
• Some key chapters are described

General Biology points:

• A-Cells
  • The statement that both and B Are wrong In the general list of the functions of cells.
  • If Bone marrow Is removed there wouldn't be red blood cell creations

General Zoology points:

• General points for animal life described