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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.
| 3101. |
Define Scalar and vectir quantity |
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Answer» Scalar quantity:- quantity which has magnitude but no direction example:- mass, speed, direction.Vector quantity:- quantity which has both magnitude and direction. Example:- weight, velocity, displacement Scalar quantity is defined as the physical quantity with magnitude and no direction.There are plenty of scalar quantity examples, some of the common examples are:\tMass\tSpeed\tDistance\tTime\tAreaA vector quantity is defined as the physical quantity that has both direction as well as magnitude.A vector with the value of magnitude equal to one and direction is called unit vector represented by a lowercase alphabet with a “hat” circumflex. That is “û“.Vector quantity examples are many, some of them are given below:\tLinear momentum\tAcceleration\tDisplacement\tMomentum |
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| 3102. |
Hlo sakshi jagpat....... |
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| 3103. |
The large scale deforestation should be stopped. List two reasons to justify. |
| Answer» The large scale of deforestation should be stopped because:-★ If deforestation is stopped then rain will come★ soil erosion is also prevented★ humans, animals are able to do respiration★maintain balance in the atmosphere | |
| 3104. |
Meristematic tissue present at the apical region |
| Answer» Apical meristem\xa0is\xa0present\xa0on root and shoot tips of the plant. This\xa0tissue\xa0divides and results in growth of stem and roots of the plant. Intercalary\xa0meristem\xa0is\xa0present\xa0on leaf base and nodes. Lateral\xa0meristem\xa0is responsible for increase in circumference i.e. girth of the stem or root of the plant. | |
| 3105. |
What is meant by solubility of a solute |
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Answer» The total amount of solute dissolved in a solvent is called solubility. The total amount of solute is dissolved in a solvent isncalled solubility Amount of a substance (called the solute) that dissolves in a unit volume of a liquid substance (called the solvent) to form a saturated solution under specified conditions of temperature and pressure. Solubility is expressed usually as moles of solute per 100 grams of solvent. |
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| 3106. |
Atom and molecules questions answer |
| Answer» 1. In a reaction, 5.3g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass.Sodium carbonate + acetic acid → Sodium acetate + carbon dioxide + waterSolution:Sodium carbonate + acetic acid → Sodium acetate + carbon dioxide + water5.3g 6g 8.2g 2.2g 0.9gAs per the law of conservation of mass, the total mass of reactants must be equal to the total mass ofproductsAs per the above reaction, LHS = RHS i.e., 5.3g + 6g = 2.2g + 0.9 g + 8.2 g = 11.3 gHence the observations are in agreement with the law of conservation of mass. | |
| 3107. |
How cloud formation |
| Answer» During day time water from different sources like pond, lake, river, sea, well etc get evaporated and this water vapour rises up with the hot air. At a particular height the air cools and the water vapour condenses to form minute droplets and form clouds. When these water-drops become heavy, they precipitate and fall down as rain. | |
| 3108. |
What is thylakoid? |
| Answer» The system is suspended in the stroma. It is a collection of membranous sacs called thylakoids. The green coloured pigments called chlorophyll are found in the thylakoid membranes. It is the sight for the process of light-dependent reactions of the photosynthesis process. The thylakoids are arranged in stacks known as grana and each granum contains around 10-20 thylakoids | |
| 3109. |
In which part of world gravitational force is larger? |
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Answer» Polar regions,north pole and south pole and less near the equator. At the poles North pole and south pole Polar regions has greater gravitational force |
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| 3110. |
what is the neutron |
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Answer» It is the third sub atomic particle which carries no charge. Neutrons are subatomic particles of atoms, they consist neutral charge(no charge).. Neutrons are subatomic particles that are one of the primary constituents of atomic nuclei. They are usually denoted by the symbol n or no. Neutrons do not have any net electric charge associated with them. They do, however, have mass which is slightly greater in magnitude than that of a proton. Neutrons and protons are collectively referred to as nucleons |
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| 3111. |
How to stop the process of sexual reproduction |
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| 3112. |
Work and energy key points of this lesson |
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Answer» I think Work and Energy have same S.I unit that is joul that may consider one reason for this. Work always succed my enerygy Work:\xa0When a force acts on an object and the object shows displacement, the force has done work on the object.Two conditions need to be satisfied for work to be done:(i) A force should act on object(a) The object must be displacedWork = Force x Displacement Unit of workdone = Joule = Newton x metre 1 Joule work is said to be done when 1 Newton force is applied on an object and it shows the displacement by 1 meter.EnergyThe capacity of a body to do work is called the energy of the body.Unit of energy = Joules 1KJ = 1000 JForms of Energy:\xa0The various forms of energy are potential energy, kinetic energy, heat energy, chemical energy, electrical energy and light energy. |
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| 3113. |
Molar dravyaman kise kahte hai |
| Answer» Gh | |
| 3114. |
Who is Antoine Lavoisier |
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Answer» Antoine Lavoisier was a great scientist. He led the foundation of chemical sciences by establishing two important laws of chemical combination he was who found or invented law of conservation of mass Antoine Lavoisier Biography:\xa0Widely credited as the ‘father of modern chemistry’, Antoine Lavoisier was a French chemist and a central figure in the 18th- century chemical revolution. He formulated a theory of the chemical reactivity of oxygen and cowrote the modern system for the nomenclature of chemical substances. Antoine Lavoiser was a father of chemistry Antoine Lavoisier was a prominent French chemist & leading figure in the 18th century chemical revolution who developed an experimentally based theory of the chemical reactivity of oxygen & coauthored the modern system for naming chemical substances. |
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| 3115. |
Write chemical formula of sodium,hydroxide,nitrate,calcium |
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Answer» Na ,OH,NO3,CA NaOhNoCa Na ; OH ; NO3 ; Ca S HO Ni Ca |
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| 3116. |
Write 5 characteristics of gas |
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Answer» \tGases have a lower density and are highly compressible as compared to\xa0solids\xa0and liquids.\tThey exert an equal amount of pressure in all directions.\tThe space between gas particles is a lot, and they have high kinetic energy.\tThe\xa0inter-molecular forces\xa0between these gas particles are negligible.\tThese particles move at high speeds in all directions and hit each other, thus causing the gas to spread throughout the container they are kept in, evenly. This also causes them to exert pressure on the walls of the container.\tSo, gases take the volume and shape of the container. The Spirit of Laws is written by Montesquieu |
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| 3117. |
I want notes of is matter around us pure plz help ??? |
| Answer» Ok | |
| 3118. |
Derivation of three equations of motion with proper discription and diagram |
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| 3119. |
If we heat paper than it will not come in liquid state . Why? |
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Answer» As the properties of paper did not support for change in physical state. H |
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| 3120. |
What do you mean by concentration of a solution? |
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Answer» The concentration of a solution is the amount of solute present in a given amount (mass or volume) of solution, or the amount of solute dissolved in a given mass or volume of solvent. Two ways of expressing the concentration of a solution :(i) Mass by mass percentage of a solution = Mass of solute ÷ Mass of solution x 100\xa0(i) Mass by volume percentage of solution = Mass of solute ÷ Volume of solution x 100 The concentration of a solution is the amount of solute present in a given amount (mass or volume) of solution, or the amount of solute dissolved in a given mass or volume of solvent. Two ways of expressing the concentration of a solution :(i) Mass by mass percentage of a solution = Mass of solute ÷ Mass of solution x 100\xa0(i) Mass by volume percentage of solution = Mass of solute ÷ Volume of solution x 100 Concentration solutionis the quantity of solute that is contained in a particular quantity of solvent or solution |
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| 3121. |
Ch3 |
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Answer» Atoms and molecules Methane |
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| 3122. |
The SI unit of pressure is |
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Answer» Pascal Pascal [Pa] Pascal Pascal Pascal |
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| 3123. |
What do you mean by soil erosion |
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Answer» Soil erosion is the displacement of the upper layer of soil; it is a form of soil degradation. This natural process is caused by the dynamic activity of erosive agents, that is, water, ice, snow, air, plants, animals, and humans In this process, the soil particles are loosened or washed away in the valleys, oceans, rivers, streams or far away lands. This has been worsening due to human activities such as agriculture and deforestation.Soil erosion is a continuous process that occurs either slowly or at an alarming rate. It results in a continuous loss of topsoil, ecological degradation, soil collapse, etc. Make a comparison and write down ways in which plant cells are different from animalcrlls |
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| 3124. |
Why in year 366 days an a necessary to in 4 years one times 366 days come |
| Answer» There are\xa0366 days\xa0in a leap year. A year usually has\xa0365 days. The extra day is needed to keep the calendar "in synch" with the Earth\'s orbit around the Sun. The Earth takes about\xa0365\xa0and a quarter days to orbit the Sun once. The extra 6hours is not included in each year. Thus leap year comes once in every four years including an extra day(24 hours) that is 29th February including the extra 6hours from each 4 revolution time periods. | |
| 3125. |
How will you show that cathode rays follow a straight path?? |
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| 3126. |
What is the net charge on an atom |
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Answer» 0 It\'s zero (0) Class |
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| 3127. |
what is John Dalton theoty. |
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Answer» Failure of Dalton’s Atomic Theory The postulates of the atomic theory by John Dalton •\tThe matter is made up of tiny particles called Atoms that cannot be divided. •\tAtoms are never formed or destroyed during a chemical reaction. •\tAtoms of an element exhibit same nature. They have the same size, mass, and character. •\tAtoms of different elements exhibit variant nature. They do not have same characteristics. •\tAtoms form compounds by combining in a ratio of whole numbers. •\tA compound contains a constant number and kinds of atoms Dalton suggested that atoms can neither be created nor destroyed and are indivisible. But the discovery of electrons and protons in atoms lead to failure of this aspect of Dalton’s theory. The postulates of this theory may be stated as follows:\tMatters are composed of very tiny particles called atoms.\tThese particles are too small to see and cannot be created or destroyed in a chemical reaction.\tAtoms of a specified element are identical in mass and chemical properties.\tAtoms of different elements have different masses and chemical properties.\tAtoms combine in the ratio of small whole numbers to form compounds.\tThe relative number and kinds of atoms are constant in a given compound. John Dalton\'s atomic theory says tht all things in the universe whether an element or a compound or a mixture is made up of an unknown seen form of matter that is the atom . Atom is the smallest particle of matter. It is the basic unit of all. It is indivisible and thus cannot be divided |
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| 3128. |
What is octopus? |
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Answer» Octopus is an aquatic creature, it has 8 legs An octopus is a soft-bodied, sea creature with a bulbous head and eight arms, hence it is named as the octopus. The name octopus was originally derived from a Greek word meaning number eight.\xa0Octopuses are carnivores, which feed on other creatures available in their area including clams, shellfish, shrimp, lobsters, fish, sharks, and even birds. These sea creatures are found in all oceans and usually live on the ocean floor, within shells, crevices, and reefs. Octopuses (or octopi, if you prefer) are cephalopods, invertebrates that also include squid and cuttlefish. They have bulbous heads, large eyes, and eight very useful arms. |
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| 3129. |
What is radioactivity?pls tell my friends! |
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Answer» Thanks Mevada Vraj bro! Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles or photons |
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| 3130. |
Draw a neat diagram of plant cell (4marks) |
| Answer» Plant cell\xa0\xa0 | |
| 3131. |
Why does air pollution increase during winter? |
| Answer» The reason for this is that cold air is denser and has less space between the molecules of gas. When the temperature drops and cold air blankets the ground, any warm air is forced to pass over it. In this way, the cold air can form a kind of cap. Pollutants aren\'t as free to escape and disperse in the dense colder air. | |
| 3132. |
Virus contaain |
| Answer» genetic material and rna | |
| 3133. |
how to get sample papers of class 9 for free? |
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Answer» Always..asking your elder brother or sister or someone near your home about their old board exam paper.? Haha There is only one sample paper for free |
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| 3134. |
Differentiate between being healthy and being disease free |
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Answer» If someone is physically, mentally,socially, economically well that means if he /she is well in all aspects , he/she is said to be healthy.But being disease free only indicates the physical wellness (having no disease only). Being disease free means your body do not show any malfunctioning but you are not fit but being healthy means that you are completely fit \tHealthyDisease FreeA state of complete physical, mental and social well beingState of the absence of discomfort in any part of the bodyIt depends upon the individual as well as on social and environmental factorsIt depends on the individual onlyA healthy person will be disease-freeA disease-free person may or may not be healthyA healthy person is energetic and is able to perform as per the requirementThe performance of a disease-free person depends upon the environment and personal attitude\t |
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| 3135. |
Explain acid rain,global warming and green house effect |
| Answer» \tGreenhouse effect is the process by which radiations from the sun are absorbed by the greenhouse gases and not reflected back into space. This insulates the surface of the earth and prevents it from freezing.\tAcid Rain as the name suggests can be said to be the precipitation of acid in the form of rain in the simplest manner. When atmospheric pollutants like oxides of nitrogen and sulphur react with rainwater and come down with the rain, then this results in Acid Rain.\tGlobal warming is a gradual increase in the earth\'s temperature generally due to the greenhouse effect caused by increased levels of carbon dioxide, CFCs, and other pollutants. | |
| 3136. |
What is Bohr model of atom can you tell me please |
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Answer» According to Neil’s Bohr the electrons could revolve around the nucleus in only certain orbits known as discrete orbits of electrons, each orbit having different radii.When an electron is revolving in a particular orbit around the nucleus the electron does not radiate energy.Bohr’s model of an atom can be described as follows:-An atom is made up of three sub-atomic particles – protons, electrons, neutrons.The protons and neutrons are located in a small nucleus in the centre of the atom.The electrons revolve around the nucleus rapidly in fixed circular paths called energy levels or shells.There is limit in the number of electrons that each shell can hold. It is given by the formula 2n2, where n = orbit number or energy level index.Each energy level is associated with a fixed amount of energy. Bohr’s Model of Atom\tAccording to Neil’s Bohr the electrons could revolve around the nucleus in only certain orbits known as discrete orbits of electrons, each orbit having different radii.\tWhen an electron is revolving in a particular orbit around the nucleus the electron does not radiate energy.\tBohr’s model of an atom can be described as follows:-\tAn atom is made up of three sub-atomic particles – protons, electrons, neutrons.\tThe protons and neutrons are located in a small nucleus in the centre of the atom.\tThe electrons revolve around the nucleus rapidly in fixed circular paths called\xa0energy levels\xa0or\xa0shells.\tThere is limit in the number of electrons that each shell can hold. It is given by the formula 2n2, where n = orbit number or energy level index.\tEach energy level is associated with a fixed amount of energy.\tThere is no change in the energy of the electrons as long as they keep revolving in the same energy level, and the atom remains stable. I don\'t know bro |
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| 3137. |
we\'re the numbers similar both times |
| Answer» dd | |
| 3138. |
Describe Thomson\'s model of atom and state it\'s drawbacks |
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Answer» Thomson’s Atomic Model- Postulates\tAccording to the postulates of Thomson’s atomic model, an atom resembles a sphere of positive charge with electrons (negatively charged particles) present inside the sphere.\tThe positive and negative charge is equal in magnitude and therefore an atom has no charge as a whole and is electrically neutral.\tThomson’s atomic model resembles a spherical plum pudding as well as a watermelon. It resembles a plum pudding because the\xa0electrons\xa0in the model look like the dry fruits embedded in a sphere of positive charge just like a spherical plum pudding. The model has also been compared to a watermelon because the red edible part of a watermelon was compared to the sphere having a positive charge and the black seeds filling the watermelon looked similar to the electrons inside the sphere.Limitations of Thomson’s Atomic Model\tThomson’s atomic model failed to explain how the positive charge holds on the electrons inside the atom. It also failed to explain an atom’s stability.\tThe theory did not mention anything about the\xa0nucleus\xa0of an atom.\tIt was unable to explain the scattering experiment of Rutherford. JJ Thomson described to structure of an atom similar to that of a Christmas Puddin in which the dry fruits were the negatively charged particles and the rest of the part was positively charged. this was also similiar to an atom in which the seeds were negatively charged particles whereas the the red edible part was positively charged. this model was proved wrong when Ernest Rutherford put forward his postulates stating that therre was space between the particles |
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| 3139. |
List the first five elements in periodic table |
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Answer» HydrogenHelium LithiumBerylliumBoron First five elements\xa0in the Modern\xa0Periodic Table\xa0are : Hydrogen, Helium, Lithium, Beryllium and Boron. HydrogenHeliumLithiumBerylliumBoron |
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| 3140. |
Write short note on depletion in ozone layer |
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Answer» Ozone layer depletion is always dependent on pollution factors.Chlorofloro carbon is most harmful gas which causes the ozone layer depletion .It is released from refrigerator, air conditioner etc. Ozone layer depletion\xa0is the thinning of the\xa0ozone layer\xa0present in the upper atmosphere. This happens when the chlorine and bromine atoms in the atmosphere come in contact with\xa0ozone\xa0and destroy the\xa0ozone\xa0molecules. One chlorine can destroy 100,000 molecules of\xa0ozone. It is destroyed more quickly than it is created. |
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| 3141. |
By what factors does the kinetic energy of an object depend on its direction of motion ? |
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Answer» Mu me le mera 100 baar Velocity The factor that the kinetic energy of an object will depend on its direction of motion depends on its speed. This is because kinetic energy is described by its magnitude or velocity. |
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| 3142. |
Which of the following material fall in the category of a pure substance ? |
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Answer» All elements and compounds are pure substance Pure substance is one that does not have any other substance or impurity present in it and cannot be separated into other kinds of matter by physical processes. It can be an element or a compound.\tOut of the given nine compounds following are the pure substances\tIce, iron, hydrochloric acid, calcium oxide, mercury\xa0are pure substances as they have definite composition.\tMilk is a colloid and acts as a heterogeneous mixture hence is not a pure substance.\tBrick and air are made up of more than one substance hence they also don’t fall in the category of pure substances. |
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| 3143. |
What is the difference between molecular and formula unit mass |
| Answer» The sum of atomic mass of all the atoms present in the chemical formula of a substance is called its formula mass.Molecular mass is the average relative mass of a single molecule of the given substance compared to 1/12 the mass of an atom of carbon12. | |
| 3144. |
Value of g (acceleration due to gravity) depends on? |
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Answer» The value of g will be constant that is 9.8m/s² Value of g remains constant in all situation |
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| 3145. |
Which were the postulates of Dalton were wrong and why |
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Answer» Atoms are the smallest particle of a matter . This was incorrect because atoms consist two parts - orbitor and nucleous Postulates of Dalton’s Atomic Theory\tAll matter is made up of tiny, indivisible particles called atoms.\tAll atoms of a specific\xa0element\xa0are identical in mass, size, and other properties. However, atoms of different element exhibit different properties and vary in mass and size.\tAtoms can neither be created nor destroyed. Furthermore, atoms cannot be divided into smaller particles.\tAtoms of different elements can combine with each other in fixed whole-number ratios in order to form compounds.\tAtoms can be rearranged, combined, or separated in chemical reactions. |
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| 3146. |
Why is copper represented by the symbol \'CU\'while there is no letter \'U\' in to the name of?? |
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Answer» copper is represented by its latin name \'cuprom\'(in short it is written Cu) Cuprum Because copper\'s latin name is cuprum ..And that\'s why the symbol Cu is used for it. The symbol of copper is taken from the Latin word \'Cuprum\'.So the first two letters of this word that is Cu is taken as the symbolic name of copper. Because copper is represented by its latin name \'cuprom\'(in short it is written Cu) |
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| 3147. |
Explain inertia and momentum in detail |
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Answer» Inertia and momentum are 2 concepts associated with the study of the motion of solid bodies. Momentum and inertia are both used to explain the current state of a body. Both are concepts related to the mass of the object.Inertia: a characteristic of an object that resists changes to its state of motion.Explanation: Inertia is an intrinsic characteristic of the object related to its mass. Inertia tells you how much force it will take to cause a particular acceleration on the object.Inertia= if the body is at rest it will remain rest and it is moving it will continue moving inMomentum: The resistance of an object to a change in its state of motion.Explanation: Momentum is a function of an object’s mass and velocity. Momentum is a measure of the kinetic energy of the objectMomentum is the product of mass and velocity. momentum(P) = mass (M) × velocity(V) Inertia mass Inertia and momentum are 2 concepts associated with the study of the motion of solid bodies. Momentum and inertia are both used to explain the current state of a body. Both are concepts related to the mass of the object.Inertia: a characteristic of an object that resists changes to its state of motion.\tExplanation: Inertia is an intrinsic characteristic of the object related to its mass. Inertia tells you how much force it will take to cause a particular acceleration on the object.\tInertia= if the body is at rest it will remain rest and it is moving it will continue moving inMomentum: The resistance of an object to a change in its state of motion.\tExplanation: Momentum is a function of an object’s mass and velocity. Momentum is a measure of the kinetic energy of the object\tMomentum is the product of mass and velocity. momentum(P) = mass (M) × velocity(V) Inertia and momentum are 2 concepts associated with the study of the motion of solid bodies. Momentum and inertia are both used to explain the current state of a body. Both are concepts related to the mass of the object.Inertia: a characteristic of an object that resists changes to its state of motion.\tExplanation: Inertia is an intrinsic characteristic of the object related to its mass. Inertia tells you how much force it will take to cause a particular acceleration on the object.\tInertia= if the body is at rest it will remain rest and it is moving it will continue moving inMomentum: The resistance of an object to a change in its state of motion.\tExplanation: Momentum is a function of an object’s mass and velocity. Momentum is a measure of the kinetic energy of the object\tMomentum is the product of mass and velocity. momentum(P) = mass (M) × velocity(V) Inertia is mass |
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| 3148. |
Action reaction force act what is the answer |
| Answer» Newton\'s third law is:For every action, there is an equal and opposite reaction.The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object\xa0equals\xa0the size of the force on the second object. The direction of the force on the first object is\xa0opposite\xa0to the direction of the force on the second object. Forces\xa0always\xa0come in pairs - equal and opposite action-reaction force pairs.\xa0 | |
| 3149. |
What is a type of "Meristems Tissue" |
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Answer» Thanks Apical lateral intercalary are the type of meristem tissue Types of meristematic tissue are apical meristem, Intercalary meristem, lateral meristem.\tApical meristem\xa0is present on root and shoot tips of the plant. This tissue divides and results in growth of stem and roots of the plant.\tIntercalary meristem\xa0is present on leaf base and nodes.\tLateral meristem\xa0is responsible for increase in circumference i.e. girth of the stem or root of the plant. Permanent tissue |
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| 3150. |
Can anyone help me ? |
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Answer» Can we be friends ? Question bolo Yes ask your doubt Yes what happened |
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