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InterviewSolution
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.
| 7801. |
Basic principle behind chromotography |
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Answer» In this process the heavy particles sattle down and the lighter particles up so thos can separate Principle: The samples are subjected to flow by mobile liquid onto or through the stable stationary phase. The sample components are separated into fractions based on their relative affinity towards the two phases during their travel.The fraction with greater affinity to stationary layer travels slower and shorter distance while that with less affinity travels faster and longer. When is solvent?? |
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| 7802. |
Which sepration teckneqe we use to seprate sugar and salt ? |
| Answer» Sugar is asoluble in alcohol so take sugar and salt mixed with alcohol evaporate alcohol sugar and salt is left .In this way you canseparate | |
| 7803. |
what type of solution is alloy |
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Answer» Homogeneous Homogeneous Homegenous solutions are alloy Solid solution |
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| 7804. |
Give examples metalloids |
| Answer» Boron,silicon and germanium | |
| 7805. |
What are weeds? Give any two examples of weeds. |
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Answer» Weed are the unwanted or undesirable plant. Eg. Parasites, Weed is a plant considered undesirable in a particular situation, "a plant in the wrong place". Examples commonly are plants unwanted in human-controlled settings, such as farm fields, gardens, lawns, and parks. ex- A few examples of broadleaf weeds are clover, dandelion, and purslane.\xa0 Weeds are unwanted plant that grow automatically and take food and nutrition with other plantHope this will help you!!!! |
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| 7806. |
In the environment sound energy again convert in sound which is earlier spoke n |
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| 7807. |
आसुत जल का क्वथनांक कितना होता है(What is the boiling point of distilled water) |
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Answer» 100 degree Celsius Above 70 c 100 Degree Celsius |
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| 7808. |
Metal are malleable.what does it mean |
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Answer» Okkk Metal have tendency to loose electron respective cation+ Yasss Mellabe is a property of metal,that they can be drawn in thin sheets. |
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| 7809. |
S.I unit of momentum |
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Answer» Kgm/s or Ns(Newton×second) Kgm/s |
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| 7810. |
What is the law of motion |
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Answer» Newton has given three laws of motion1) If a body is in rest or in an uniform motion then the body will remain in same state until and unles an external force is applied on it.This law gives the concept of force and inertia i.e. tendency to retain its position.2)The rate of change of momentum of an object is directly propportional to the force applird on it.This law gives the magnitude of force F~m(v-u)/t F~ma. (a=v-u/t) F=k.ma (K=1) F=maWhere F for Force,~ for directly proportional to,m for mass and a for acceleration.3)To every action there is equal and opposite reaction.Means if we apply force on an object then it will also apply reaction force on you.Some important points about 3 law are-1.Action and reaction acts in always pair.2.Action and reaction acts on different objects so they do not cancle eachother. \tNewton gave three laws of motion that describe the motion of bodies. These laws are known as Newton\'s Laws of motion.\tThey describe the relationship between the forces acting on a body and its motion due to those forces.\tThe three laws of motion were first compiled by Sir Isaac Newton in his work Principia Mathematica, first published in 1687. Newton used these laws to explain and investigate the motion of many physical objects and systems. |
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| 7811. |
This question is very importantPlease answer this questionMy question isWhich is the best study app |
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Answer» Its depend on you how you are studing not on application. Every application is good if you wants to study.This application is good, but if you wants to take lecture in english then you can use Topper application This app This app Plz answer fast |
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| 7812. |
How to separate solid in liquid |
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Answer» By melting If the particle are large enough that they can be separated by filter paper then you can use filteration but if the particles are small that they can pass through filter paper then you can use evaporation.if you wants to get crystal then you can use crystallisation By filtration |
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| 7813. |
What is the need of 5 kingdom classification? |
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Answer» It is bio just cram it don\'t ask reason, why it is,ect According to this system, there are five main kingdoms. They are:\tKingdom Monera\tKingdom Protista\tKingdom Fungi\tKingdom Animalia\tKingdom Plantae 1.Porifera 2.Monera 3.Fungi 4.Platae and 5.Animilia Kingdom are the classification |
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| 7814. |
Why it is imp. To vaccinate children |
| Answer» So that , that child do not get that disease in future.By developing immunity against that disease. For example : polio virus is treated by providing dead polio virus in the form of vaccine | |
| 7815. |
Velency of an element x is 3 write the chemical formula of its oxide |
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Answer» Al2o3 F2O3 |
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| 7816. |
How to learn Chemistry easily? |
| Answer» improve your ability to study and learn chemistry.Review and Study Material Before Going to Class. ...Seek Understanding. ...Take Good Notes. ...Practice Daily. ...Take Advantage of Lab Time. ...Use Flashcards. ...Use Study Groups. ...Break Large Tasks Into Smaller Ones. | |
| 7817. |
Ratio of mass in Hydrogen Oxygen |
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Answer» 1:8 H1602 H16O2 |
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| 7818. |
Prove that v2= u2 - 2as |
| Answer» From 1st equation of motion, V = U + AT Therfore, V - U = AT We know that S = (U + V / 2 )×T ∴ S/T = U + V / 2 ∴U + V = 2×S/T ∴ U + V = 2S / TSo Substituting eq1 and eq2, (V - U ) (V + U ) = AT ×2S/T ∴V² - U² = 2AS. | |
| 7819. |
Recoiling of gem kya hota h. |
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Answer» Thanks ishu rana Jab hum gun se goli fire karte hai. Or fir vo piche ki taraf aati hai usee recoiling of gun kahte hair. Humka Nahi pata |
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| 7820. |
52gram helium finding in why mole |
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| 7821. |
Write any two examples to show that evaporation causes cooling |
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Answer» When Evaporation occurs it absorbs all the heat from the surrounding and hence. Evaporation causes cooling.Some examples are as follows:1.when tea is poured into a saucer when it is very hot it is exposed to a large\xa0area and causes evaporation n the tea becomes cool.2.In summer seasons the\xa0water gets cool in a earthen pot because it has fine pores in it through which\xa0water seeps out gets evaporated\xa0.3.when we sweat n sit under a fan we feel cool .4. doctors advice patients with fever to keep a wet on their fore head.5.\xa0A wet khus khus screen hung at the door of the room keeps the room cool. Matka |
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| 7822. |
Can anyone send me experiments of class 9 |
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| 7823. |
Briefly define molecule. |
| Answer» When atoms combine,it forms molecules or in other words combination of atom is called molecules.Example : H2O is a molecule because it is the combimation of two oxygen atom and one hydrogen atom | |
| 7824. |
What is density?what is its SI and CGS unit? |
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Answer» CGS unit is g/(cm^3) Density of an object is defined as its mass per unit volume.Its SI unit iskm/m^3 Density of an object is defined as its mass per unit volume. Its SI Unit is kg/m^3. |
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| 7825. |
What is separation? State its importance? |
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Answer» The actions or state of being moving or being apart is called separationvarious methods are as follows :1. Adsorption2. Electroplasis3. gravitational methods4. cristalization5. Drying What is separation? State its importance? |
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| 7826. |
Define 1 pascal |
| Answer» 1 pascal is defined as Unit force exerted per unit area. 1 Pascal = 1 Newton/1m*m | |
| 7827. |
why do metals conduct electricity? |
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Answer» Because they have electrons Due to their property |
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| 7828. |
Difference weight and mass |
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Answer» mass is the measure of total no of matter present it is scalar it never changes whereas weight is the force of the body over ground due to gravity it is vector and changes Mass cannot change weight can change Weight is vector quantity Mass is scaler quantity |
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| 7829. |
Diff btwn carrier and vector |
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Answer» Vector : they are the intermediaries which carry infectious agents from an infected person to a healthy person.Example : sandfly is the vector of kala azarCarrier: they are thethe organisms which causes diseases from their body itself to a healthy personExample :HIV carrier Ok.. no problem.. Mujhe nahi malum |
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| 7830. |
What are isotopes ... write two isotopes of carbon |
| Answer» Isotopes have same atomic number but different atomic mass | |
| 7831. |
Define symptoms of disease |
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Answer» subjective evidences of a disease Sure indications of a disease |
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| 7832. |
What is presbiopia |
| Answer» Presbiopia is a type of old age hypermetropia | |
| 7833. |
What is epidermic |
| Answer» The occurrence of more case of a disease than would be expected in a community or region during a given time period | |
| 7834. |
How is valency of atom related to its electronic configration... |
| Answer» Valency is the combining capacity of an atom. Valency is calculated by using number of valence electrons present in an atom. The number of electrons present in the last shell of an atom and take part in chemical bond formation are known as valence electrons.The number of electrons which an atom has in its last orbit can be found out by writing the electronic configuration of an atom. So, electronic configuration expresses the valence electrons which are related to the valency of an atom. | |
| 7835. |
Define buoyancy. |
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Answer» Appilled force acting on an object in water Simple anwser is the force that cause objects to float. The force that causes objects to float. According to the principle of Archimedes, when a solid is placed in a fluid (a liquid or a gas), it is subject to an upward force equal in magnitude to the weight of the fluid it has displaced. |
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| 7836. |
What will be the force of gravity at the center of the earth and why |
| Answer» The force of gravity at the centre of the earth will be zero because the force of gravity goes on decreasing as it moves away from the surface of the earth and ultimately it becomes zero. | |
| 7837. |
give an example each of monocotyledon and dicotyledon plants? |
| Answer» \tBased on the number of cotyledons present in the seed, all flowering plants are classified into monocots and dicots. Monocots are called as monocotyledonous plants and dicots are called as dicotyledonous plants.\tMonocotyledenous seeds have single cotyledon in them whereas Dicotyledenous seeds have two cotyledons in them.\tGrains, banana, plam, onions, and grass serve as the examples for monocots whereas legumes, mint, tomato and mango tree serve as examples of dicots. | |
| 7838. |
Cell as a Basic unit of life notes |
| Answer» The smallest functional unit of life is cell, discovered by Robert Hooke in 1665. A cell can independently perform all necessary activities to sustain life. Hence cell is the basic unit of life. There are two types of cells → plant cell and animal cell. | |
| 7839. |
Why plants die when over water? |
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Answer» Because when there is more water the air is replaced with water so due to lack of air or oxygen plants die. Due to endoosmosis may be |
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| 7840. |
Neuron function |
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Answer» Neuron recieve and conduct impulses To send the messages to brain through reseptars The\xa0neuron\xa0is the\xa0basic\xa0working unit of the brain, a specialized cell designed to transmit information to other nerve cells, muscle, or gland cells.\xa0Neurons\xa0are cells within the nervous system that transmit information to other nerve cells, muscle, or gland cells. Most\xa0neurons\xa0have a cell body, an axon, and dendrites. It\'s functions is to send messages to brain about sensations and body conditions |
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| 7841. |
Explain diffusion phenomenona based on state of matter ? |
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Answer» it is the intermixing of particles of matter. it is related to kinetic energy and temperature or heat provided.. In Diffusion intermixing of gases take place is it based on gas state of matter |
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| 7842. |
Function of cork cell |
| Answer» Cork cambium (pl. cambia or cambiums) is a tissue found in many vascular plants as a part of the epidermis. It is one of the many layers of bark, between the cork and primary phloem. The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems. It is found in woody and many herbaceous dicots, gymnosperms and some monocots (monocots usually lack secondary growth). It is one of the plant\'s meristems – the series of tissues consisting of embryonic disk (incompletely differentiated) cells from which the plant grows. The function of cork cambium is to produce the cork, a tough protective material. | |
| 7843. |
Define acceleration. what is its SI unit? write the mathematical formula to find acceleration. |
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Answer» Acceleration can be defined as change in velocity with respect to time S.I.unit of acceleration is m/s2 Time rate of change of velocity is called acceleration. SI unit is m/s^2a=(v-u)/t or dv/dt Acceleration is a measure of the change in the velocity of an object per unit time and mathematically it is given asAcceleration = change in the velocity / time takenIf the velocity of an object changes from an initial value u to the final value v in time t, the acceleration a is given by,a = v - u/tSI unit of acceleration is ms-2. |
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| 7844. |
What factors may be responsible for losses of grains during storage? write two examples of each. |
| Answer» During the storage of grains, various biotic factors such as insects, rodents, mites, fungi, bacteria, etc. and various abiotic factors such as inappropriate moisture, temperature, lack of sunlight, flood, etc. are responsible for losses of grains. These factors act on stored grains and result in degradation, poor germinability, discolouration, etc.\xa0 | |
| 7845. |
Why a balloon kept in a sun burst after sometime? |
| Answer» Because outside the temprature is high and due to a kenetic energy increase and the molecules of gas exerts a pressure on the wall of the balloon so it will countinue to expand and there is a stage come that the balloon brust | |
| 7846. |
What is coriolis force |
| Answer» It is an apparent force. In northern hemisphere it deflected winds towards the right and southern hemisphere it deflects wind towards the right | |
| 7847. |
Cotton being a solid floats on water .Why? |
| Answer» Cotton has a lot of inter space between it as we can observe.As density of air is less than those of density of water it floats | |
| 7848. |
How sound propagate |
| Answer» Apna number de batata hu | |
| 7849. |
Comment your WhatsApp number |
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Answer» This place is for study Why |
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| 7850. |
If action is always equal to reaction ,explain how a horse can pull a cart |
| Answer» It is because of the gravitational force | |