10th Grade Science: Physics Laws and Properties

• The document is a "Score Booster" of 150 must-solve science questions for 10th-grade board exams in 2025, curated by Vedantu Master Teachers, and focuses on Physics, Chemistry, and Biology.

PHYSICS

• When a resistance wire is stretched to double its length, its resistivity remains the same because resistivity depends on the material's nature.
• The V-I graph for a series combination of two resistors is the one with the maximum slope, indicating the highest resistance.
• The laws of reflection are applicable to all reflecting surfaces, regardless of their shape (plane, concave, or convex).
• The image in a plane mirror is virtual, erect, and the same size as the object.
• Alloys are used in electrical heating devices due to their high resistivity and high melting point compared to their constituent metals.
• When light travels from medium A to medium B and bends towards the normal, the refractive index of medium B relative to A is greater than unity, indicating that medium B is denser.
• Sunrise occurs a few minutes earlier and sunset occurs a few minutes later than actual times due to atmospheric refraction, which bends sunlight due to the increasing refractive index of the Earth's atmosphere with altitude.
• If the current through a resistor increases by 100%, the power dissipated increases by 300%.
• Electric appliances with metallic bodies have three-pin connections for safety, connecting the metallic body to the earth, while electric bulbs have two-pin connections.
• A constant current flowing horizontally in a wire produces a magnetic field with a direction that can be determined using the right-hand thumb rule.
• In the case of a wire with current moving from East to West, the magnetic field direction above the wire is from South to North.
• Inside a long current-carrying straight solenoid, the magnetic field strength is the same at all points.
• A concave mirror can focus the image of a distant object at its focus.

Very Short Answer Physics

• Voltmeter resistance should be high, ensuring less current passes through.
• A concave mirror has a real principal focus.
• A glass lens placed in a transparent liquid becomes invisible when the refractive index of the lens equals that of the liquid.
• The iris controls the pupil's size, and the crystalline lens focuses light to form an image on the retina.
• An alpha particle moving perpendicular to magnetic field lines experiences maximum force, but no force when moving parallel.

Short Answer Physics

• Concave mirrors are used in solar furnaces to converge parallel sunlight rays to a focal point, creating high temperatures Convex mirrors are used as rearview mirrors in vehicles because they provide a wider field of view, creating diminished, virtual images.
• Formula to determine the resistance of a material R = ρ(l/A), with l=1 km, A=2x10-6 m2, so ρ = 81 Ω
• The number of resistors = 3 with a Resistance= to 132Ω
• The potential drop across 10 Ω resistor is 2 V
• Ray diagram that shows "A ray of light incident on that rectangular glass slab, and immerse it in any emergence between its glass that stays parallel to its self"
• Speed of light in water is 1.33 : 1.5
• A combination of convergent lenses will be organized at a distance of f₁ + f₂ so the parallel beam can enter the one lens making it as another parallel beam
• Accommodation of power is the ability of eye to view the power of accommodation, the ciliary muscles modifies the curvature to some extent that enables the user to the nearby objects
• Hypermetropia statement is causes are Shortening the eyeball and focal length is too long, it can be corrected by using a convex lens
• Hypermetropia is Excessive curvature of the eye lens and elongation of the eye ball, so there may be a concave lens that can correct which is a defect
• Dispersion of white light occurs when splitting in it's seven constituent colors. Dispersion when a white beam is refracts it splits into contistent colors (different bending angle for each) causes spectrum

Short Answer Physics 2

• Power of combining 9Ω and 9Ω is two 9 ohm resistors in parallel connected, where their series is is R = 92+-Ω=13.5Ω
• Two 9 ohm resistors when series is connected with 9 ohm resistor is parallel then it can be connected where R = 6Ω
• Magnetic is depended on the strenght when increases from 100% when the corductor passes, follow the direction of the magnetic field
• Solenoid is a coil of many circular turns of insulated copper wire wrapped closely in the shape of a cylinder
• A small candle needs to follow these steps" The image will move further away from the mirror and
• "Therefore, the screen must be moved backward to maintain a sharp image" which will help it maintain an image to remain sharp
• Series circuit is where wattage will be add 4.5 W and a Ammeter= 1.0A reading can occur
• (i) The voltage of each component is same(ii) Overall resistance is lower than the resistance of single component(iii) Automobile headlight is connected in parallel,(iv) There is a single path for the flow of electrons/charge
• The measure of binding the ray of light to the medium is constant
• In order to receive a real image, the range of distance for an object will be,
• "The number of Alpha and Numerics are important in mainting focus and can determine an image on either being "Large and diminished".

Longe Answer Physics

• Power is degree of the light rays achieved on the lens and how it defined to mainting recoprocial of focal length.

CHEMISTRY

MCQs

• Potassium hydroxide (KOH) yields K⁺(aq) and OH⁻(aq) ions when dissolved in water.
• Mixing aqueous solutions of sodium chloride and silver nitrate results in a double displacement reaction, forming a white precipitate of silver chloride and sodium nitrate.
• The melting point and boiling point of ethanol are lower than that of sodium chloride because the forces of attraction between molecules of ionic compounds are very strong.
• Carbon dioxide is an inorganic carbon compound.
• Propanone is the IUPAC name of the second member of the homologous series of ketones

Very Short Answer Question - Chemistry

• In electrolysis of water, the gas collected over one electrode is double that of gas collected over the other electrode because water contains hydrogen and oxygen in a 2:1 ratio. In the reaction 3MnO₂ + 4Al → 3Mn + 2Al₂O₃, 'Al' is the reducing agent Aluminum is more because the Al displaces Mn from its oxide. Red litmus in sodium carbonate solution turns blue. Curd isn't in metal vessals acids that cause metal to have reaction and become bad for a health

Short Answer Chemistry Question

The green layer formed on copper exposed to air is basic copper carbonate [CuCO₃.Cu(OH)₂], due to corrosion. Calcium floats in water because hydrogen gas is produced, making it float.

• Gold and silver are metals exist in nature in a free stated -CH₂- is the difference in the molecular formula between consecutive members of a homologous series
• Shown are the diagrams of C₂H₄ and CH₃CH₂Cl which are chloroethane and ethene

Short Answer Chemsitry Question

• combination and single-displacement both create the chemical equation of reaction
• 'X' is Calcium oxide that react with H₂0 = water to produce - 'X' is calciam hydroxide
• The metal will show the iron displace when CuSO₄ to cause the iron to make it a solution
• The method of acid to be add should very slow in order to constain a cooling
• A studnet has found to follow PH that help detected solution A,B,C,D
• Some Metals are alloyed to help form for Nickel and Cromium

Long Answer type Questions:

• The fact that coevlant calsse cause bad conudctors when reacted with ethanic acids leads to less ions
• zinc with copper sulfate in copper
• conc.H₂SO₄ = Ethanol and Ethene
• Funtaioncs and functional group -oh and cooh are important for these properties/compdunds

Long Answer type Chmeistry Questions

• Oxidation is a exothermic reaction because releases heat during respiration with a gain and loss of electrons

• Percipate is a reaciton that exchanges ions and created an unsovablr reaction , While reaction creates exchange and vice versa. The last one is that exchanges oxidation and reduction reactions

• PH levels are dependent on if ca3o creates a tooth decay where low ph is bad. - Alkali has a power source.

• Sodium hydrogen carbonate and tartaric acis, sodium helps give CO₂ to make better cake. So heat it and you the product as 2NaHCO3 (s) → Na2CO3(s) + CO2(g)+H2O(l)

Very Long Answers

• Name the elctron to show calcium and sulfur which a
• The number of compouds and air holes of a burner are also important with other compdunds
• Double boneds equal the active group but are often created with more unsaturated properties to a surface where there are good source.

Chemistry Long Answer

• Activity : Zinc will be eovlved a stronger acide than H₂.
• chemical euation of sodium metal is added with thanoic acid, followed solid with carbonate, then anothiac where the product
• 2Na(s)+2H2O→2NaOH(aq)+H2(g) coldened with - If
• The equation must be setabalnced in relation to the conservagion of a natural equation and create energy with a high volume that is uncreated. There must be food with a low volume that shows a
• A lower volume can create a larger area with high tempature that cna show new signs
• Electrocytes can be used to cause a form and volume in that type of volume to occur and vise versa. The type of measuremtm depends on tempature
• The liquid volume in a solid object is a source where the volume from that item starts and ends.

Very Long Answer

There are 3 types of liquid volumes that determine a the source with more traits

• Volume, size and radius is determined in these equations
• Volume is more depended on a lower ratio
• To create a new look with new liquid traits to show this relationship

Biological Information

(a) Is true , but (R)is false for Assertions and Reasons ,

• 1-nucleus2-chloroplast3-vacuole4.guard cell is how these can all be combined and more
• Two way Glucose with energy with also, Aerobic and an absence with is considered Anaerobi, all those can exist when following equation
• Resin and gums with plants which are all the same - volume, size and radius
• From top, to bottom that sequence is key for what they require 100%
• From top, to bottom, as well can the equation or problem it becomes a more solvable format
• In the top of the solution is volume, size and radius is determined in these .

Additional Biological Information

• As volume is more depended on a lower ratio can also relate
• To create a new look with new liquid traits to show this relationship as well

(b) in volume, size and radius is determined in these all can also determine the

• In volume, from top to bottom, what a size and radius Volume and size depending on to high temperature, can show more radiation.

Biological Very Long type

• As volume is more depended on a lower ratio can also relate
• To create a new look with new liquid traits to show this relationship as well, with new dimensions

(I) Surgical in order to determine the liquid to have a reaction, (2) In those types of new dimensions to be had, its to break away with more in focus when showimg this. As it,s important.

(iii) from that point and those new focus can occur, the liquid will have more traits depending on source with radius and with type of measuremtn.

As volume is more depended on a lower ratio can also relate

• To create a new look with new liquid traits to show this relationship as well with all the sizes

As radius as well The size and volume will equal where it needs

More Info (Biology)

• volume, size and radius depending on to high temperature, can show more radiation where . 1-2-3 are equal

A student is viewing, they may not stay a high quality,

• The traits may not be known until the solution in created. They do need to all same volume as the show different results when
• High temps Different measuremtms

They can all can show different signs and show a good value

Other Biological

• In addition to the solution, volume in the body is important to the body

• Small amount of traits are volume size equal high temperature.

• The chart of liquid and non is key where size volume is set

Key physics concepts for 10th-grade board exams. Covers resistivity, V-I graphs, reflection laws, mirror images, and alloy usage. Includes explanations of refractive index and light behavior in different mediums.