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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 5851. |
Which organism consists of acetabulum?...pariplaneta is the scientific name of which organism...? |
| Answer» A.. human/B.. cockroach | |
| 5852. |
Why transverse wave cannot produce in gase?Give reaaons |
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| 5853. |
What is proyon |
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Answer» If ur que is proton then my ans Proton is a subatomic particles of atom whic contain + charge in it .it is located in nucleus That\'s proyon or proton . |
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| 5854. |
How many many type of simple permanent tissu? Mention their function and location |
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Answer» Bhai sidha google se copy paste mat kiya karo Simple Permanent Tissue: Simple permanent tissue is composed of similar types of cells. Simple permanent tissues are of three types, viz. parenchyma, collenchyma and sclerenchyma.(1) Parenchyma: The cells of parenchyma have thin cell wall. They are loosely packed; with lot of intercellular spaces between them. Parenchyma makes the largest portion of a plant body. Parenchyma mainly works are packing material in plant parts. The main function of parenchyma is to provide support and to store food. In some plant parts, parenchyma has chlorophyll as well. In that case, parenchyma carries out photosynthesis and is then termed as chlorenchyma. In aquatic plants, large air cavities are present in parenchyma. This provides buoyancy to the plant, and then the parenchyma is known as aerenchyma.(2) Collenchyma: The cell wall of collenchyma is thickened at corners. Intercellular spaces are very few. Collenchymas provides some degree of structural rigidity with flexibility. Collenchymas is present in leaf stalk; below the epidermis. Due to this, the leaf talk can easily bend but does not break.(3) Sclerenchyma: The cell wall in sclerenchyma is highly thickened all around. The cells are dead and intercellular space is absent. Sclerenchyma provides structural rigidity to plant parts. Bark is composed of sclerenchyma. Another example of sclerenchyma can be seen in the coconut husk. |
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| 5855. |
Write a characteris features of bacterial cell which is present in the plant cell especially |
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| 5856. |
Analys the scattering experiment of alpha particle and write its conclusion in own words |
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Answer» Bhai sidha google se copy paste mat kiya karo A thin gold foil sheet is taken and alpha particles are pass through them what happens some alpha particles pass straight ,some deflect by small or large angle and some bounce back . These concludes that some space is present in an atom ,some solid substance is present called nucleus, and nucleus have positively charge particles. |
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| 5857. |
State law of conservation of energy .explain in a case of freely falling object |
| Answer» Find video lessons, notes, papers, syllabus, solutions to doubts & more Home / Doubts and Solutions/ICSE/Class 10/PhysicsHow to prove law of conservation of energy?Asked by Sushant Kumar9th March 2014, 3:17 PM Answered by ExpertAnswer:Law of conservation of energy states that the energy can neither be created nor destroyed but can be transformed from one form to another.Let us now prove that the above law holds good in the case of a freely falling body.Let a body of mass \'m\' placed at a height \'h\' above the ground, start falling down from rest.In this case we have to show that the total energy (potential energy + kinetic energy) of the body A, B and C remains constant i.e, potential energy is completely transformed into kinetic energy.conservation of energyBody of mass m placed at a height hAt A,Potential energy = mghKinetic energy = 0 [the velocity is zero as the object is initially atrest] Total energy at A = Potential energy + Kinetic energy.Total energy at A = mgh …1At B,Potential energy = mgh= mg(h - x) [Height from the ground is (h-x)]Potential energy = mgh - mgxKinetic energy = ½ mv2The body covers the distance x with a velocity v.Kinetic energy = mgx Total energy at B = Potential energy + Kinetic energyTotal energy at B = mgh …2At C,Potential energy = m x g x 0Potential energy = 0Kinetic energy = ½ mv2The freely falling body has covered the distance h.Here, u=0, a=g and s=hKinetic energy = ½ mv2Kinetic energy = mgh Total energy at C = Potential energy + Kienetic energyTotal energy at C = mgh …3It is clear from equations 1, 2 and 3 that the total energy of the body remains constant at every point. Thus, we conclude that law of conservation of energy holds good in the case of a freely falling body. | |
| 5858. |
Who is the father of Botany ? |
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Answer» Yes it is correct ?? Theophrastus is known as the father of batony ..✌️? |
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| 5859. |
What is macro nutriant and why are they called macra nutrident? |
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Answer» The nutrients which helps in building blocks of plants are called macronutrients. They are called so because they are needed in larger amount by the plants. Macronutrient are the nutrients which are required by the plants in larger quantities Nutrients used by plants in large amount like nitrogen etc |
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| 5860. |
What is green revoluation |
| Answer» It is a revolution that helped india to become food surplus country from a food scarce country it involved the use if modern farming technique methods like use of hyv seeds etc | |
| 5861. |
Why the colour of Sun is red when it rises? |
| Answer» The colour of sun is red when it rises because the red rays deflects more than other coulours | |
| 5862. |
Difference Between Bryophyta,Thallopyta and Ptreidophyta |
| Answer» \tCharactersThallophytaBryophytaPteridophytaHabitatMostly aquatic (fresh and marine- both forms exist).Terrestrial, present in damp places.Terrestrial, present in damp and shady places.Body StructureBody is undivided in the form of thallus.Body is flat, green thallus (liverworts) or leafy and erect (mosses)Plant body is erect and rigid.True roots, stems and leavesAbsent >AbsentPresentVascular systemAbsentAbsentPresent*** organsSingle-celledMulticellularMulticellular and jacketed in sterile cells.\t | |
| 5863. |
Why bryophytes are called the amphibian of plant kingdom |
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Answer» Amphibians are those organisms which live on both land and in water. Bryophytes are called amphibians of the plant kingdom because these plants though live in soil but they need water for sexual reproduction. The sperm of bryophyte (antherozoids) are flagellate and need water to swim to the eggs. In other words, as these plants need water for reproduction unlike other plants, they are called as amphibians.\xa0 Because these Plants live in soil but they need water for sexual reproduction . |
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| 5864. |
Najn groupill send chyth tharam |
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Answer» Malayle ala chinse Malayalee aano |
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| 5865. |
Send the score of india austrila cricket |
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Answer» Australia cricket team imageAUS*-288/5 (50.0)India cricket team imageIND-Yet to batInnings Break · Australia won the toss and elected to bat Australia cricket team imageAUS*288/5 (50.0)India cricket team imageINDYet to batInnings Break · Australia won the toss and elected to batting. |
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| 5866. |
What are phanerogams? |
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Answer» \tPhanerogams or spermatophyta are the most advanced type of plants bearing seeds.\tThey have roots, stems, leaves and flowers.\tThey include gymnosperms and angiosperms. Those plants who produce seeds |
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| 5867. |
Molecular masses of all elements |
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| 5868. |
How many mark you got in science |
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Answer» 79/80 1000/100 |
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| 5869. |
Cardic muscular tissue is similar but still distant from other muscular tissue why |
| Answer» Because it occurs only in wall of heart. | |
| 5870. |
What is endocytosis ? |
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Answer» It is a process by which amoeba elgulfs its food Endocytosis: Flexibility of the cell membrane to engulf food and other substances from external environment is called endocytosis. example: amoeba.\xa0 |
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| 5871. |
What are canal rays?? |
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Answer» Canal rays are positively charged rays ? They pass through canal that in holes in cathode are called as canal rays Eugen Goldstein discovered positively charged rays known as canal rays. |
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| 5872. |
Different b/w manure and firtilizer |
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Answer» Manure is organic matter and fertilizer is an inorganic salts manure is made up of bio waste fertilizer is made up of chemical like npkmanure doesnt mix with waterfertilizer can mix with water |
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| 5873. |
Why transversal wave cannot produce in gases |
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| 5874. |
What are lichen? |
| Answer» It is a dual organisms formed by association between alga and fungus. Alga manufacturers food and fungi absorb water and minerals and provide protection to alga. | |
| 5875. |
Why sound travel in a wave form |
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| 5876. |
trypanosoma is which type of protozoan? |
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| 5877. |
Explain how names and symbols of elements are given in modern days |
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Answer» Al for aluminiumCo for cobalt He for heliumThis for your help and information Symbol of elements its first letter written in capital and the other letter in smallEg:-Al, Co ,He |
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| 5878. |
Name the physical quantity whose SI unit is hertz |
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Answer» It is frequency ?????? Frequency Frequency |
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| 5879. |
Number of molecucules in 100g of NH3 is more than 100g of N2 |
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Answer» M,Molar mass of NH₃=14+(1×3)=17m,Given mass=100 gn,number of moles=m/M=100/17n=N/N₀N=n×N₀=(100/17)×6.022×10²³=3.55×10²⁴M,Molar mass of N₂=14×2=28m,Given mass=100 gn,number of moles=m/M=100/28n=N/N₀N=n×N₀(100/28)×6.022×10²³=2.15×10²⁴∴Number of molecules in 100 g of NH3 is more than 100 g of N2. M,Molar mass of NH₃=14+(1×3)=17m,Given mass=100 gn,number of moles=m/M=100/17n=N/N₀N=n×N₀=(100/17)×6.022×10²³=3.55×10²⁴ |
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| 5880. |
Why do we snake and turtle in the same class |
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Answer» Because they both are reptiles means both creep/crawlSnake is exceptional case in reptiles as it doesn\'t have limbs (foots ) ✓ Body is covered by scales.✓ Skin is dry, rough and without glands.✓ Have three chambered heart.✓ Lateral sense organs are absent. |
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| 5881. |
Observations of sounds |
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| 5882. |
Explain the term compressibility of gases? ? |
| Answer» The molecules are further apart and there is more space between the different molecules, whichmakes the gas more compressible. Due to the high compressibility, the largevolumes of the gas can be compressed and can easily be transported.The examples are:The LPG (liquefiedpetroleum gas) cylinder that we use in our homes for cooking.The CNG (compressednatural gas) that we use in our vehicles.\xa0 | |
| 5883. |
Mention any one method of incorporation desirable characters into a crop variety |
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Answer» I also not understand the question ?? Not understood question Hahaa |
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| 5884. |
What is electron, protone nutrone |
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Answer» Electron is negatively charged particle proton is positively charged particle and neutrons are neutral These all are sub atomic particles.Electrons have negative charge , protons have positive charge , neutrons have no charge means they are neutral |
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| 5885. |
Find out the number of potassium if the atomic number is 19 and the mass number is 39 |
| Answer» What number....? | |
| 5886. |
Iow of conservation of mass |
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Answer» Law of conservation of mass was proposed by Antoine lavosier. According to this law, mass of reactants is equal to the total mass of products. It means that mass can neither be created nor be destroyed. My channel name is GAMING FREAKSwith 22 subscriber ... Pls subscribe my channel -:https://www.youtube.com/channel/UCCLdFU8k2FB4qX9IoxRxMog Law of conversation of mass means that the mass can neither be created nor destroyed in any chemical reactions...I hope this will help you If this help you then touch on thanks |
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| 5887. |
Write all formulas of physics chapter chapterwise |
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Answer» Chapter 12 Speed = wavelength / time Speed = wavelength x frequency Chapter 11W = f x s Or W = mg x s Kinetic energy = 1/2 mv square Potential energy = mgh P = W / t Chapter 10 F = G M x m / d square g = G M / d square W = m x g Pressure = force or thrust / area Relative density = density of a substance / density of water Chapter 9 Momentum = mass x velocity Or p = mv F = ma Conservation of momentum mAuA + mBuB = mAvA + mBvB Chapter 8Speed = distance / timeVelocity = displacement / time a = v - u / tEquations of motion v = u + ats = ut + 1/2 at square 2as = v square - u square |
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| 5888. |
Formula of calcium nitrate |
| Answer» Calcium nitrate, also called Norgessalpeter (Norwegian saltpeter), is an inorganic compound with the formula Ca(NO3)2. This colourless salt absorbs moisture from the air and is commonly found as a tetrahydrate. It is mainly used as a component in fertilizers but has other applications. | |
| 5889. |
What is joule |
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Answer» Joule is he SI unit of work and energy when a force of 1N displaces of 1m in its own direction the work done is said to be 1 joule When a force of 1 Newton moves a body through a distance of 1 metre in its own direction then work done is known as 1 joule SI unit of work as well as energy |
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| 5890. |
Diffrence between mixture and compound |
| Answer» \tCompoundMixtureCompound are substances which are formed by chemically combining two or more elements.Mixtures are substances that are formed by physically mixing two or more substances.Compounds are three types which are covalent compounds, metallic compounds and ionic compounds.Mixtures are mainly of two types i.e. homogenous mixtures and heterogeneous mixtures.Compounds fall under pure substances.Mixtures fall under impure substances.The chemical composition of compounds is always fixed.A mixture can have a variable composition of the substances forming it.\t | |
| 5891. |
Why lysosomes are known as suicide bags? |
| Answer» Lysosomes are cellular organelles that contain digestive enzymes that break down waste materials, foreign material and cellular debris. Lysosomes are capable of digesting nucleic acid, polysaccharides, fats, and proteins. Along with them lysosomes also digest or damage its own cells by its own enzymes, which lead to cell death. This process is called as autolysis. Hence lysosomes are also called as suicide bags . | |
| 5892. |
Explain the experiment of rutherford with alpha particle and draw its diagram |
| Answer» Rutherford postulated that the atom must contain large empty spaces as most of the α-particles passed through it without getting deflected. Some α-particles were deflected by the foil through small angles, while some were deflected through very large angles. Thus, Rutherford concluded that the positively charged particles in an atom must be concentrated in a very small space.One out of every 12,000 particles were deflected through 180o showing a full rebound. Thus, Rutherford came to the conclusion that all the positive charges of the atom and most of the mass of the atom is concentrated in a very small volume within the atom.\xa0Rutherford named this small space inside the atom as the nucleus of the atom or the atomic nucleus. On the basis of these observations, Rutherford calculated that the atomic nucleus is 105 times smaller than the total area of the atom. The radius of the atom is 10-8 centimetres while the radius of the nucleus is 10-13 centimetres.\xa0Thus, we can say that the atom is relatively hollow with a heavy nucleus at its centre. The electrons arranged around the nucleus possess negligible mass.\xa0 | |
| 5893. |
Make a flow chart of animal tissue. |
| Answer» Flow chart of all animal tissues individual.Hope this ll help you. | |
| 5894. |
Derive the formula to calculate kinetic energy of an object according to 3 marks |
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Answer» We know that work=F.s =ma s (=v2- u2/2a) so ma×v2- u2/2a then 1/2 m (v2- u2) (u=0) then k.e = 1/2mv2 W= m × a × s = m × a × v2- u2/2a = 1/2 m (v2 -u2)Consider u= 0 thenW= 1/2 mv2 Hence the kinetic energy possessed by an object of mass m moving with velocity v is :K.E = 1/2mv2 |
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| 5895. |
What is slinky |
| Answer» Fitting closely to the line of the body | |
| 5896. |
What do you mean by physics ?explain? |
| Answer» Physics is a word used to tell the different things about the science which contains formulas | |
| 5897. |
Derived the formula of kinetic energy |
| Answer» As Work done= Force*DisplacementAnd force=Mass*acceleration (ma) and Displacement ( distance or s)= 2as=v2-u2 s=v2-u2/2aTherefore, W=ma*v2-u2/2aa and a got cancelled (means from ma and 2a ,a gets cancelled)As object is starting from rest position u2=0Therefore, m*v2/2And take 2 as a whole and hence formula is derived,1/2 mv2You may also consult NCERT class 9 for better understanding ! | |
| 5898. |
Which tissue in plants? |
| Answer» Meristematic or permanent tissue is present in plants | |
| 5899. |
Explain the mole concept. |
| Answer» 1 mole of a substance is equal to its atomic mass or molecular mass expressed in grams. The atomic mass expressed in grams is the gram atomic mass. The molecular mass expressed in grams is the gram molecular mass.For example, The atomic mass of sodium is 23 grams.Therefore, 23 grams of sodium is equal to one mole of sodium atoms.Similarly, the molecular mass of oxygen (O2) = 2 × Atomic mass of oxygen= 2 × 16 = 32 gAvogadro experimentally found that one mole of any substance always contained 6.022 × 1023 particles.This number is called the Avogadro’s number, denoted by N0. | |
| 5900. |
is the work done negative when an object is lifted from the ground??? |
| Answer» Yes, it will be begative because it is in opposite diraction of gravity so,gravity=-g | |