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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.
| 36101. |
Blanching chemical equations |
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Answer» You have to make sure that the number of each elements is same in both the reactants n products? Hii |
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| 36102. |
Define aqueous soln |
| Answer» Any solution that contains water as the solvent is referred as aqueous solution. | |
| 36103. |
How can we call as this CH |
| Answer» | |
| 36104. |
Explain the working function of electric motor |
| Answer» Working\tWhen the current begins to flow, current flows through brush X, then A to B, B to C, C to D and then to brush Y and into the battery.\tNow applying Fleming\'s Left Hand Rule to wire AB, Current is along AB, Magnetic Field is as shown (North-> South), the motion of the wire is downwards.\tNow applying Fleming\'s Left Hand Rule to wire CD, Current is along CD, Magnetic Field is as shown (North-> South), the motion of the wire is upwards.\tThe rectangular coil begins to move in the anti-clockwise direction\tNote that during anti-clockwise motion, the split rings and axle also move, whereas the brushes don\'t move.\tAfter half a rotation, Wire CD and Split ring Q moves to the left. Wire AB and Split ring P moves to right. Brushes X and Y donot move.\tNow applying Fleming\'s Left Hand Rule to wire CD, Current is along DC. (Battery -> Split ring Q -> DC , Magnetic Field is as shown (North-> South), the motion of the wire is downwards.\tNow applying Fleming\'s Left Hand Rule to wire AB, Current is along BA. (Battery -> Split ring Q -> DC --> CB -> BA --> Split ring P) , Magnetic Field is as shown (North-> South), the motion of the wire is upwards.\tSo, again the coil rotates in the anti-clockwise direction.\tThe reversal of current in the coil results in the continous rotation of the coil. The reversal of current is achieved by the commutator rings | |
| 36105. |
Explain in brief how ozone layer is getting depleted |
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Answer» Ozone layer becomes depleted due to the presence of CFCs takes place which comes out by refrigerators,Ac,many more They do not degrade easily these atoms of CFCs react with ozone and breaks their molecules yep Ozone layer has began to deplete due to environmental pollution. This was highly due to increasing use of CFCs. They do not degrade easily and rise up in the atmosphere in atoms. These atoms react with ozone and dissociations ozone molecules into oxygen. |
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| 36106. |
Which is the only non metal liquid at room temperature |
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Answer» Mecury is a metal which is found in liquid state at room temperature but bromine is the only non metal which is found in liquid state Mecury Mercury and gallium Bromine Bromine Mercury bromine mercury Bromine? Mercury |
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| 36107. |
Homologous series define |
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Answer» Homologous which have same structure but diff function homologous are the series in which two continuous atom differ by one carbon atom and two hydrogen atom Homologous series is a series in which successive groups differ by ch2 group |
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| 36108. |
Electrolytic reduction? |
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Answer» answer likh kar bhejo Hi suhu??????? Hi dr? Good night.....??????? Gud night |
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| 36109. |
Clening action of shoap |
| Answer» When soap is dissolved in water, it forms a colloidal suspension in water in which the soap molecules cluster together to form spherical micelles . In a soap micelle, the soap molecules are arranged radically with hydrocarbon ends directed towards the centre and the ionic ends directed outwards. when a dirty cloth is put in water containing dissolve soap, then the hydrocarbon in soft soap molecules in the micelle attached to the oil or grease particles present on the surface of dirty cloth. In this way the soap micelle entraps the oil or dirty particles by using it\'s hydrocarbon ends. The ionic ends of the soap molecules in the micelle, however remain attached to water. When the dirty cloth is agitated in soap solution, the oily and greasy particles present on its surface and entrapped by soap micelles get dispersed in water due to which the soap water becomes dirty but cloth gets cleaned. The cloth is cleaned thoroughly by rinsing in clean water and number of times... | |
| 36110. |
What are lipids |
| Answer» Fats are called lipids ... | |
| 36111. |
What ic catenation |
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Answer» The property of interlinking an atom of elements with covalent bond to form a straight chain or cyclic chain is known as or called catenation The ability to form a carbon compound ring branched and straight chain called catenation The ability of element to form chain branched and ring is known as catenation The self linking property of an element to form a long chain is called catenation.. Catenation is the property in which bonding of atoms of same element takes place... Please tell the answer for my question |
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| 36112. |
Name all the 4 processes of humans and plants. (Life Processes) |
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Answer» Nutrition, movement, growth, reproduction, excretion, transportation.... 1. Nutrition 2.Respiration 3.Transportation 4.Excretion |
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| 36113. |
How to focus on physics and get good marks |
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Answer» Try to understand the concepts.be confident in what u know.see visual video in YouTube to understand the concepts better. Do numericals |
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| 36114. |
How and when human beings know about reproduction? |
| Answer» When women were vomatting without any reason, then it checkup through prega news she will pregnant or not. | |
| 36115. |
Explain electrolytic refining of copper |
| Answer» Electrolytic\xa0refining of copper:In the process of electrolytic refining of copper, the electrolyte used is acidified copper sulphate.Impure metal is made as an anode and pure metal is made as a cathode.On passing the electric current through the electrolyte, the impure metal from anode dissolves into the electrolyte solution and pure metal from copper sulphate solution deposits on the cathode.At Anode: Cu\xa0→ Cu2+ + 2e-At Cathode:\xa0Cu2+ + 2e-\xa0→ CuThe soluble impurities go into the solution and insoluble impurities settle down at the bottom of an anode and are known as anode mud. | |
| 36116. |
Digestion of carbohydrates |
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Answer» It converts into glucose It helps in digestion of carbohydrates into glucose |
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| 36117. |
When the image distance be + or - in the case of cancave mirror and convex lens |
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Answer» If an image is formed behind a concave mirror (to the right side) , the image distance is positive but if the image is formed in front of the mirror (on the left side) , then the image distance will be negative... In a convex mirror, the image is always formed on a right hand side(behind the mirror) , so the image distance for a convex mirror will be always positive... |
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| 36118. |
Sample question paper answers |
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Answer» www.cbse.online Go to cbse website |
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| 36119. |
Why dont clouds fall on earth due to gravity? |
| Answer» Clouds contain huge amount of water in them but they dont fall on earth because they are spread in very large area in miles and contain water in the form of water droplets.... | |
| 36120. |
Why is red colour selected for danger signal lights |
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Answer» Because it is least scatter Red colour is used for danger signals because red light has highest wavelength and it deviates the least so it can be seen from far away Red colour is least scattered by air molecules. It has the longest wavelength due to which it travels farther than any other colour. Becoz it has the longest wavelength than any colour and is scattered least by air components... |
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| 36121. |
How many isomers are there in chloropentane? |
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Answer» Wlcm Thnks 8 |
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| 36122. |
What is iupAc name? |
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Answer» International Union of pure and applied chemistry IUPAC is a nomenclature of chemical compound in chemistry by worldwide.It stands for International Union for Pure and Applied chemistry.IUPAC nomenclature helps to know a chemical compound in whole world by a single and unique name... IUPAC nomenclature of organic chemistry is a method of organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry. For whom? |
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| 36123. |
What is nephritis |
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Answer» Kidneys are the organs that play a major role in the functioning of different organs of the Human body. They are involved in the removal of waste matters from our body and also is involved in the purification of blood. The word ‘Nephritis’ is a kind of disease that causes inflammation in the kidney bladder. It generally affects the interstitial tissues which surround the tubules and the glomeruli present in the kidney. It is also called as Acute nephritis. Sorry inflammation of kidney... Nephritis is the inflammation of and may be other parts of kidney such as glomerular tubules or superstitial tissues... |
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| 36124. |
What are the principle\'s of Electric Generation ? |
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Answer» Principle: An electric generator works on the principle of electromagnetic induction. When a coil is rotated between the magnet or when the magnet is rotated in and out of the coil the current is induced in the coil and the direction of current is given by Fleming\'s right hand rule. It convert mechanical energy to electrical energy Electromagneric induction |
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| 36125. |
What is difference between chemical and organic evolution? |
| Answer» \tChemical evolution\xa0Organic evolution1. It occurs due to changes in the structure of molecules; from complex molecules to simple molecules with the passage of time.1. It occurs due to changes in a species which appear generation after generation and accumulate to form a new species.2. It is a relatively fast process and hence, it is possible to prove it in a laboratory.2. It is a very slow process and hence, it is impossible to prove it in a laboratory.3. It involves the evolution of chemicals such as water vapour, methane, ammonia and hydrogen into organic molecules such as sugars which later combined to form big molecules such as proteins, RNA and DNA.3. It involves the evolution of enzymes, proteins, RNA and DNA into membrane bound proto cells and finally into living cells.4. Chemical evolution came into being before organic evolution.4. Organic evolution is a consequence of chemical evolution.\t | |
| 36126. |
What is rheostat and its work |
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Answer» A rheostat is a variable resistor or an adjustable resistor.Its resistance can be varied as desired.It is a continuous resistance varying device used to change the magnitude of current in a circuit by changing the length of the resistance wire inserted into the circuit.The main use of a rheostat is as variable resistance . Variable resistance is called rheostat..It is used to change the direction of current.. |
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| 36127. |
Latest oswaal book pattern |
| Answer» New pattern question | |
| 36128. |
I always produce diminished, erect and virtual image. What am I |
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Answer» It can be both concave lens and convex mirror. Convex mirror Convex mirror Concave lens Convex mirror.. |
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| 36129. |
Why mensuration occur |
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Answer» In females, one egg is released from one ovary every month. Every month, the uterus prepares itself to receive the embryo in case fertilization occurs. But if fertilization does not occur, the uterine wall is shaded off in order to prepare itself for the ovary which will be released in the coming month. Hence, to discard the unwanted uterine endometrial lining and the ovary which is not fertilized the menstruation occurs in human females. Summa |
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| 36130. |
Does the Focal Length of concave mirror always negative???? |
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Answer» It is always negative except when the object is placed btw pole and the focus. Yes No . It is not always negative. It depends on the placement of object No Sorry...?..I was wrong...It is always negative... Thanks Sorry...positive No...when it is placed between pole and focus..then it is negative... |
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| 36131. |
What is the components of blood |
| Answer» RBC, WBC, platelets and plasma.. | |
| 36132. |
What is the resistance in air hwps |
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Answer» 1.3×10^16 What is hwps here??? |
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| 36133. |
Xerophytic plants? |
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Answer» Hi Bye shreya ? Sbko bye.....kl maths h mere?? Mere kl maths ke h... Kaisi ho adu... Mere bi exams.......sst h kl. Hii shreya ?? Mst hu....bs xm chl rhe.. Hii dikshu...hlo adu And u..?? ?? Ekdam mst ????? hii ?? Hlo Plants which is grown in dry regions..? |
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| 36134. |
List three events occurring during photosynthesis |
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Answer» Yes (iii) reduction of carbon dioxide into carbohydrates (ii) conversation of light energy into light energy into chemical energy (i) Absorption of light energy by chlorophyll |
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| 36135. |
What happens when bar magnet moved quickly ttowards the solenoid |
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Answer» A current flows and magnetic field is induced It will form an electromagnet It generat the curent |
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| 36136. |
How does the nervous Tissue cause action...??? |
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Answer» Thanks ☺ Messages from nervous tissue, present in the brain arw sent to different body parts. These messages are sent in the form of electrical signals. These signals change the arrangement of protein in the muscle cells,which changes their structure and causes action? Nervous tissue has an ability to generate electrical impulse in response to stimuli and to rapidly transmit the electrical impulse to the site of the origin along their length in a particular direction .due to electrical impulse they give message to brain and then cause action. |
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| 36137. |
Oerste experiment............. |
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Answer» According to orested, when a current is produced along a conductor then magnetic effect is felt around the conductor is known as magnetic effect of electric current.. I think it\'s orested..? |
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| 36138. |
List in proper sequence four steps of obtaining germinating dicot seed |
| Answer» Four steps of obtaining germinating dicot seeds are :- (i) Imbibition (ii) Respiration (iii) Effect of light (iv) Mobilization of reserve food. | |
| 36139. |
Balance the chemical equation Fe + h2o - fe3o4 + h2 |
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Answer» Fe+12H2o - Fe3O4+12H2 Like this 3fe+h2o-fe3o4+4h2 3 Fe + 4H2o --- Fe3O4 + 4H2 3fe + 2HO2 - fe3o4 + h2 . I think this way |
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| 36140. |
When the image distance will be + or - in the case of convex mirror |
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Answer» It always be positive Negative Image distance will be negative as the image formed on the left side of convex mirror.So according to new Cartesian rule, image distance will be negative Convex mirror always forms virtual image.So the image distance will be always positive I am agree with Royal Thakur Sorry the image distance will be positive because it forms virtual and erect image. Image distance will always be negative because it forms real and inverted image in all case . |
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| 36141. |
How to know about the image distance - or + in concave mirror and also in convex lens |
| Answer» When image is virtual and erect then the image distance will be positive but when it is real and inverted then the image distance will be negative. In concave mirror only in one case when object is between pole and focus then the image distance will be positive. In convex mirror image distance is always positive. | |
| 36142. |
Role of pupil. |
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Answer» Controls and regulates the amount of light entering the eye Pupil The pupil is essentially a hole in the center of your iris that controls how much light enters the eye. It\'s size is controlled by the relaxing and contracting of the iris. When there is high light intensity, the pupil shrinks while it grows in low light intensity. This is to ensure there is enough light for vision without damaging the sensitive retina. The function of the pupil is to allow light to enter the eye so it can be focused on the retina to begin the process of sight. |
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| 36143. |
What is sporification |
| Answer» The process of formation of spores in lower plants or as in fungi is called sporification. | |
| 36144. |
What hapeen when lead nitrate is strongly heated |
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Answer» The product form is yellow in colour When lead nitrate is strongly heated, it forms a yellow residue lead monoxide, brown gas nitrogen dioxide and colourless gas oxygen. |
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| 36145. |
Take lead nitrate solution in a test tube,add potassium iodide solution to this what do we observe? |
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Answer» it lead to the formation of Lead iodide and potassium nitrate We observed that yellow precipitate of lead iodide is formed... |
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| 36146. |
When we put silver spoon in copper sulphate solution then what is the chage in the spoon |
| Answer» Not any reaction takes place because silver is less reactive than copper.. | |
| 36147. |
Region of tongur for different taste |
| Answer» Teri ma ka tongur | |
| 36148. |
Write damaging effects on organism of ultraviolet radiation . |
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Answer» Damaging effects of UV rays are as follow:-1. Defect in vision,2.skin cancer.This question is only 1 or 2 marker question. Depending on the amount and form of the radiation as well as on the type of skin exposed, ultraviolet radiation can cause erythema,sunburnt photo damage,skin cancer, damage to the eyes, damage to the immune system of the skin and chemical hypersensitivity.... |
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| 36149. |
aluminium is more reactive than iron but yet corrosion is less than that of iron |
| Answer» Aluminum is more reactive than iron but it doesn\'t corrode It is because of aluminium oxide layer. Aluminium outer surface layer is oxidized whenever it came in contact with the air and so result in aluminium oxide layer which is resistive in nature and remain attached to it. So due to this it act as protective layer to inner aluminium to get oxidized with air while in iron as the surface layer of iron is oxidized, it form rust which is not remain attached to iron and fall off exposing the inner iron for further oxidation. | |
| 36150. |
Give four uses of plaster of Paris. |
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Answer» There are 4 uses of \'POP\',1. It is use for fracture in our bone,2. It is use for making of toys,3. It is use to decorate our ceiling,4. It is use for making toys,etc,. 1. Plaster of Paris is calcium sulphate hemihydrate2.It is called plaster of Paris because it is obtained from gypsum and is found in Paris3. It is obtained by heating gypsum4. It is used for plastering fractured bones.5. It is used in making toys.6. It is used in making casts for statue toys etc.7. It is used for making blackboard chalks.8. It is used in dentistry.9. It is used in laboratories.10. It is a white powder. It is use in making toysUse in fracture to give support |
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