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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.
| 45601. |
IAS banne ke liye Arts lena jaruri ha kya |
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Answer» Not necessary Yes |
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| 45602. |
Reaction of black and white photography |
| Answer» Decomposition rxn of AgBr or AgCl | |
| 45603. |
Describe respiratory system? |
| Answer» The respiratory system consists of a group of organs and tissues that help us to breathe. The main parts of this system include a pair of lungs, a series of airways for air passages, blood vessels, and the muscles that facilitate breathing.Nose:The nose possesses a couple of exterior nostrils which are divided by a framework of cartilaginous structure termed as the septum. This is the structure that evenly separates the right nostril from the left nostril. Tiny hair follicles that cover the interior lining of nostrils acts as the body’s first line of defence against foreign pathogens. Furthermore, they provide additional humidity for inhaled air.Larynx: Two cartilaginous chords lay the framework for the larynx. They are situated at the point of joining the pharynx and trachea. It is also termed as Adam’s apple or the voice box. It is the portion which rises and falls during swallowing of food particles. It generates sound as air passes through the hollow in the middle.Pharynx:The nasal chambers open up into a wide hollow space termed as pharynx. It is a common path for both air and food. It functions by preventing the entry of food particles into the windpipe. The epiglottis is an elastic cartilage which serves as a switch between the larynx and the oesophagus by allowing the passage of air into the airway to the lungs, and food into the gastrointestinal tract.Trachea: The trachea or the windpipe rises below the larynx and moves down to the neck. The walls of trachea comprise of C-shaped cartilaginous rings which give hardness to the trachea and maintain it by completely expanding. The trachea extends further down into the breastbone and splits into two bronchi, one for each lung.Bronchi:The trachea splits into two tubes termed as bronchi, which enter each lung individually. The bronchi are divided into secondary, tertiary, and to bronchioles which is again further divided into small air-sacs called the alveoli. The alveoli are minute sacs of air with thin walls, and single-celled manner. It enables the exchange of oxygen and carbon dioxide molecules into or away from the bloodstream.Lungs:Lungs are the chief centres of the respiration process. They are located in the thoracic cavity of the chest near the backbone and on either side of the heart. They are the pair of large, spongy organs mainly involved in the exchange of gases between the blood and the air. Compared to the left lung, the right lung is quite bigger and heavier. | |
| 45604. |
Why a glass plate used on solar cooker |
| Answer» The sun rays pass through the glass sheet cover and get absorbed inside the cooker box. It traps more and more heat rays of the sun, thus it is helpful in heating the food item.So the box of a solar cooker covered with a glass plate. | |
| 45605. |
How does the embryo get nourishment inside the mother\'s body ? |
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Answer» Through placenta Placenta Through placenta |
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| 45606. |
what is autotrophs |
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Answer» Those organism which make their own food and not depend on othersFor example- plants \tThose organism which can make their own food from carbon dioxide and water is called autotrophs.\tGreen plants contain green pigment called chlorophyll which is capable of trapping sunlight energy. The organism which prepared their own food by the process of photosynthesis are called autotrophs ex plant |
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| 45607. |
What is stastistics |
| Answer» The branch of mathematics deal with data collection organizations analysis interpretation and presentation is the branch statistics | |
| 45608. |
How do genes control traits or charecteristics? |
| Answer» Genes contains the blue print of body that means full information of our body including every character or feature so at the time of copulation 50% genes comes from male and rest 50% comes from female . | |
| 45609. |
what is resistivity and what its unit |
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Answer» SI unit of restivity is ohm.m \tThe resistivity of a material is the resistance of a wire of that material of unit length and unit cross-sectional area. The unit for resistivity is the ohm-metre.\tThe resistivity of a material depends on its nature and the temperature of the conductor, but not on its shape and size.\tA good conductor has less resistivity, whereas a bad conductor or insulator has high resistivity. The property of conductor to resist the flow of the charge through it is called resistivity the si unit is ohm |
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| 45610. |
How much wire are made by 1 gram of gold |
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Answer» 2km it is given in ncert book 2 km?????? Are you sure it is 2km??? 2 km |
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| 45611. |
What is difference between saponification reaction and esterification reaction |
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Answer» Reaction between alcohol and acid to give Easter is called esterification reaction whereas reaction of Easter with acids and bases to give back alcohol and acid is called saponification reaction Saponification: The process of making soap from hydrolysis of oil and fat is known as saponification...........Esterification: when the organic acid reacts wih alcohal in the presence of constratic sulphuric acid. It lead to formation of a sweet order compound called esterification |
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| 45612. |
where are the reproductive parts of plants located??? |
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Answer» Flower Flower |
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| 45613. |
What is alloye |
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Answer» An allow is a homogeneous mixture of two or more metals either its is metal or non metal An alloy is a homogenous mixture of two or more metals, or a metal and a non metal. It is prepared by melting the metal and dissolving the other elements in definite proportions. It is then cooled to room temperature. If one of the metals in the alloy is mercury, the alloy is known as amalgam. Sometimes an alloy has lower melting point than any of its constituents. For example solder, an alloy of lead and tin has low melting point and hence it is used in welding. Homogenous mixture of two or more metals is known as alloy. The mixture of two or more metals to form a new qnd better properties is called alloy |
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| 45614. |
Reaction for Rusting |
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Answer» When iron is exposed to water or air over a period of time, the iron reacts with oxygen in the presence of moisture to form a reddish-brown chemical compound, iron oxide. This is referred to as rust. So chemically, rust is hydrated iron(III) oxide or Fe2O3.nH2O. The chemical equation for the same is given by:4Fe(OH)2 + O2 + xH2O → 2Fe2O3.(x+4)H2O Fe + yo2 + xh2o give fe2o3. Xh2o Fe3+O2=Fe2O3 |
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| 45615. |
explain refining of metals? |
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Answer» Electrolytic refining:\xa0 It is the process of refining of metal in which impure metal is made the anode and a thin strip of pure metal is made the cathode. A solution of metal salt is used as an electrolyte. The apparatus is shown in the figure given below. When electric current is passed through the electrolyte, the impure metal from the anode is dissolved in the electrolyte and an equal amount of pure metal from the electrolyte is deposited on the cathode. The soluble impurities go into the solution whereas the insoluble impurities settle down at the bottom of the anode which is known as anode mud. Following diagram shows the electrolytic refining of copper in which anode is impure copper and cathode is thin strip of pure copper while the electrolyte used is the copper sulphate solution. Obtaining pure metals frm impure metals is known as refining of metals |
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| 45616. |
What is pulvini ? How does it help in dropping leaf of mimosa pudica |
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Answer» Wrong answer Pulvini is present in the leaf of mimosapudica...it helps in drooping of the leaf...As we touch the leaf the water concentration in the celland pulvini decreases and the leaf droops....That is why we say that mymosa pudica\'s leaf are turgour operated |
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| 45617. |
Describe transportation system in plants? |
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Answer» The phloem is responsible for translocation of nutrients and sugar like carbohydrates, produced by the leaves to areas of the plant that are metabolically active. The xylem is also composed of elongated cells like the phloem. However, xylem is especially accountable for transporting water to all parts of the plants from the roots. Since they serve such an important function, a single tree would have a lot of xylem tissues.Transpiration is the driving force behind uptake and transport of water. It is the process of water evaporation through openings called stomata. This creates a pull by replacing the water that has evaporated. This pulling in the xylem tissues would extend all the way down due to the cohesive forces. This negative water pressure that occurs in the roots will eventually result in an increase of water uptake from the soil.The sun’s energy is strong enough to propel the water from the roots to the leaves. The heat from the sun causes the water to evaporate, setting the water chain in motion. To evolve into tall, self-supporting land plants, trees have to develop the ability to transport water from the soil to the tip that is at a staggering vertical distance. Now one might wonder how water could withstand the tensions pulled up by a tree. This is because water molecules stick to each other. Taking this strength into account, the loss of water at the top of a tree through transpiration provides the driving force to pull water and mineral nutrients up the trunks of trees as mighty as the redwoods. Transportation system in plants are occured by xylem vessels and phloem they transport minerals ,water and food to the plants |
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| 45618. |
Mention three characteristics feature of hormonal secretions in human beings |
| Answer» (i) Hormones are also known as chemical messengers as they act at a place different from the site of their manufacture.(ii) Their hyper and hyposecretion may cause disorder.(iii) They helps in control and co-ordination of the activities of living organism. | |
| 45619. |
A total of three shells ,with four electrons in its valence shell.which element is this? |
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Answer» Silicon (SI) Silicon Silicon, Si (2, 8,4) Silicon Si silicon |
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| 45620. |
What about sciences practical question |
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Answer» For bio.: budding in hydra, binary fission in amoeba, stomata, and carbon dioxide is given out during respiration Read all the practical of ncert |
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| 45621. |
If the length of the wire is doubled , how will the current in the circuit change ? |
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Answer» Halved Current will be halved |
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| 45622. |
Name some binary acids? |
| Answer» Naming Binary Acids. The names of binary acids begin with “hydro-” followed by the name of the other element, modified to end with “-ic.” For example, HCl is named hydrochloric acid. ... It is a member of the binary acids. | |
| 45623. |
All activities of ch 2 |
| Answer» See in NCERT book | |
| 45624. |
Which is bigger in size li and Na |
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Answer» Na is bigger in size because it has 3 shell Sodium is bigger in size as it comes after Li in the same group and we know that atomic size increases as we go down the group. Na is bigger Na Na is bigger |
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| 45625. |
There is too much confusion in. F1 nd F2 progeny |
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Answer» F1 progeny means cross between parent and F2 generation means cross between child which is obtained from F1 progeny F1 is that progeny in which cross b/w only one character of two similar plants.F2 is that in which cross b/w two contract character of two similar plants What confusion |
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| 45626. |
Describe the structural and functional of digestive system of human body with daigram? (5 marks) |
| Answer» A human digestive system is a group of organs working together in converting food into energy and basic nutrients required for the body. It is made up of the gastrointestinal tract, also called as digestive tract along with liver, pancreas, and gallbladder which constitute the parts of the digestive system. The hollow organs that make up the gastrointestinal tract –\xa0GI tract include the mouth, stomach, esophagus, small intestine, large intestine that contains rectum and ****.Mouth: Food starts its journey from the mouth or the oral cavity. There are many other organs that contribute to the digestion process including teeth, salivary glands, and tongue. Teeth are designed to grind food particles into small pieces and are moistened with saliva before the tongue pushes the food into the pharynx.Pharynx: A fibromuscular y shaped tube attached to the terminal end of the mouth. It is mainly involved in the passage of chewed/crushed food from the mouth through the esophagus. It also has a major part in the respiratory system, as air travels through the pharynx from the nasal cavity on its way to the lungs.Esophagus: This is a muscular tube that connects the pharynx which is a part of an upper section of the gastrointestinal tract. It supplies swallowed food along with its length.Stomach : It serves as a muscular bag which is situated towards the left side of the abdominal cavity, beneath the diaphragm. This vital organ acts as a storage for the food and provides enough time to digest meals. The stomach also produces digestive enzymes and hydrochloric acid that maintains the process of digestion.Pancreas: It is a larger gland present just inferior to the stomach. It is short with its head connected to the duodenum and tail pointing towards the left part of the abdominal cavity. The pancreas releases digestive enzymes to complete the process of chemical digestion.Small Intestine: A thin, long tube of about 10 feet long and a part of the lower gastrointestinal tract. It is present just behind the stomach and acquires a\xa0maximum area of the abdominal cavity. The complete small intestine is coiled and inner surface consists of folds and ridges.Large Intestine: This is a thick, long tube measuring around 5 feet in length. It is present just beneath to the stomach and wraps over the superior and lateral edges of the small intestine. It absorbs water and consists of bacteria (symbiotic) that support in the break down of wastes to fetch small nutrients. | |
| 45627. |
Role of placenta |
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Answer» The placenta is an organ found only in mammals during development of foetus. It is made up of cells derived from both mother and foetus.\tPlacenta allows the exchange of materials between mother and foetus.\tIt allows the transfer of nutrients and oxygen from mother to foetus.\tWaste products excreted by the foetus like urea, uric acid and even carbon dioxide are diffused to maternal blood stream by the placenta.\tAntibodies pass through the placenta that provides immunity to the foetus.\tPlacenta secretes several hormones that are essential for foetal development. Placenta helps to give nutrition to the foetus which makes baby healthy ... |
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| 45628. |
Biodiversity hots spot |
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Answer» A biodiversity hotspot is a region of the Earth that is extremely biologically diverse and also under severe threat due to habitat loss, climate change, or extensive species loss. Guarding these regions from further damage is considered environmentally and culturally important, as they host organisms that are not found anywhere else on Earth. Where many types of flora nd fauna available |
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| 45629. |
What os gangue ? |
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Answer» Impurities such as soil ,sand etc are found in minerals The sandy and rocky impurities that are present in the ore is called gangue. Gangue: Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc., called gangue. The impurities associated with ore is called gangue |
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| 45630. |
Solid sodium carbonate is added to ethanoic acid |
| Answer» 2CH3COOH+Na2CO3-》2CH3COONa+H2O+CO2 | |
| 45631. |
Why do fire files glow at night |
| Answer» Unnecessary question | |
| 45632. |
How do organism reproduced |
| Answer» By the fusion of their gametes | |
| 45633. |
What is the chemical formula for rust |
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Answer» Fe203.xh2o=2fe+3o2 Fe02 Fe2o3.xh20 |
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| 45634. |
What are 3 advantages of sexual reproduction.Explain in breif? |
| Answer» By the help of sexual reproduction... we get variations and our generation promotes... we get increments in surviving our life... we also explore our generation.. Fusion of male nd female gamets known as sexuall reproduction.. | |
| 45635. |
What is fundic stomach |
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Answer» Bhai ncert pado What is a theta wave in brain They are simple almost straight tubes, two or more of which open into a single duct. They secrete hydrochloric acid (HCl) and intrinsic factor. The pyloric glands are located in the antrum of the pylorus. They secrete gastrin produced by their G cells. |
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| 45636. |
advantage and one disadvantage of fossil fuel ⛽? |
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Answer» advantage is that it produce lot of heat after burning, which is basic step for generating various types of energy. Disadvantage:it leads to the release of harmful gases in atmosphere, which can cause many problems like global warming , acid rain etc. Disadvantage - they pollute the enviroment and may get leak during transpotation advantage - they providea energy in huge amount The disadvantages of fossil fuels are as follows: ... Leakage of some fossil fuels, such as natural gas, crude oil can lead to severe hazards. Hence, transportation of these fuels is very risky. Fossil fuels have contributed in more than one way for global warming, the issue that is being combated all over the world. |
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| 45637. |
u known for what |
| Answer» ? | |
| 45638. |
Name the type of mirrors used in the design of solar furnaces |
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Answer» Concave mirror are used to concentrate sunlight in solar furnaces concave mirror concave mirrors and plane mirrors both can be used Concave mirrors are used in the design of solar furnaces |
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| 45639. |
Which metal oxide is used in the printing of black and white paper? |
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Answer» No need?...my pleasure.. Thanks mishthi The reaction of AgCl and AgBr with sunlight is used in black and white photography. |
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| 45640. |
difference between.. cerebellum and cerebrum |
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Answer» What do u mean..? u don\'t no for what...hmmmmm? Cerebrum:used for memorizing ,learning, personality, reasoning whileCerebellum:used for controlling balance of body, hold a object, cycling ,dancing etc |
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| 45641. |
What is electromagnetic waves |
| Answer» The production of electricity from magnetic waves is called ELECTROMAGNETIC WAVES | |
| 45642. |
Give a test that can be used to differentiate chemically between butter and cooking oil |
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Answer» By bromine water reaction Bromine water decolourise by an unsaturated compound .Butter decolourises bromine water while cooking oil will not do so. Could you pls tell me how it works. BROMINE WATER TEST is a test that can be used to differentiate chemically between butter and cooking oil.:-) Bromine water test |
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| 45643. |
Explain formation of micelles |
| Answer» A spherical aggregate in soap molecule in the soap solution in water is known as micelles | |
| 45644. |
How is the *** of the childdetermined in human beings |
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Answer» When the *** chromosomes are XX then child is girl.When the *** chromosomes areXY then the child is boy. Because |
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| 45645. |
Kya exam m modern periodic table ka koi group ya period puch sakte h? |
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Answer» Kisi element ka group no. Ya period no. Puch sakte h Nahi ese nahi puchenge......usse related puchenge....par usme table ka koi part diya hoga..usme se kisi element ka group number ya period number puch skte hai * period... Haan jiii....aapko specific element ka group no and prediod no baatna hoga ya vice versa... |
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| 45646. |
Why carbon forms covalent bond? Or explain tetra valency ? Or co valency |
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Answer» Bcz carbon only share its electron to get stable. Tetra valency : carbon has 4 electrons in its valence shell. Thus it forms 4 covlent bonds by sharing electron because it can neither lose nor gain electrons... |
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| 45647. |
Why the force of magnetic lines is more if they are closer? |
| Answer» | |
| 45648. |
What is reflex action explain with diagram. |
| Answer» Answer:A reflex action is defined as a spontaneous, automatic and mechanical response to a stimuli without the will of an individual. In such actions there is no involvement of the brain. All reflex actions are conveyed through the spinal cord by a path called reflex arc.The reflex action travels in the following sequence:The reflex arc constitutes the following components:\tA receptor to perceive the stimulus.\tA sensory or afferent nerve which carries the message from the receptor to the spinal cord.\tThe neurons of spinal cord transmit the impulse from afferent neurons to efferent neurons.\tThe motor or efferent nerve carries messages from spinal cord to the muscles (effectors) that show the response.Some examples of reflex actions are:\tBlinking of eyes when a foreign particle gets in them.\tSneezing if an unwanted particle enters the nose.\tWatering of mouth at the sight or smell of good food.\tWithdrawal of foot while walking if a nail comes in the way and pricks the foot.\tImmediate withdrawal of hand of a person if some hot thing touches it. | |
| 45649. |
Draw the diagram of human brain and explain its functions. |
| Answer» Human brain is main coordinating centre of the body, which enables an organism to think and take decisions.Functions of different parts of brain are:Medulla oblongata\xa0It controls involuntary actions and regulates reflex responses. It also controls blood pressure, salivation and vomiting.Cerebellum\xa0It controls and coordinates different muscular actions. It is responsible for voluntary actions and maintains equilibrium of the body during walking, drinking, catching, etc.Forebrain\xa0It has following parts:Cerebrum\xa0performs thinking, reasoning, speech, intelligence and usage of information.Olfactory\xa0lobes are responsible for detecting smell from different receptors.Diencephalon\xa0controls body temperature, urge of eating, drinking, etc. | |
| 45650. |
Describe various plant hormones with their functions. |
| Answer» Auxin: Promotes growth of a shoot.Cytokinin: Promotes growth by rapid cell division.Gibberelin: Promotes growth.Ethylene: Helps in ripening of fruits. Growth inhibitorAbsisic acid: Growth inhibitor. eg: Wilting of leaves. | |