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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.
| 39501. |
What is electrostatic |
| Answer» Electrostatics is a branch of physics that studies electric charges at rest. | |
| 39502. |
Why solution turns milky when we add water in purfume |
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| 39503. |
What is the type of reaction in which the reactant to give simple product |
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| 39504. |
Which sample book is relevant for science |
| Answer» Oswaal or 15+1 | |
| 39505. |
Short points of hazard of nuclear power generation |
| Answer» Nuclear fuels are non-renewable sources of energy and large amount of radioactive materials, which are toxic in nature, are released in the environment which are extremely hazardous to the health of living being for thousands of years. The major disadvantage of nuclear power is Emission and poor management of radioactive waste. | |
| 39506. |
How many elements are known at present |
| Answer» 118 | |
| 39507. |
Please add lab manual |
| Answer» Rohit lab manual science | |
| 39508. |
Why grasshopper blood is green? |
| Answer» It does not carry oxygen | |
| 39509. |
The gas least soluble in water is:(a)HCl. b) NH3. c)N2. d) CO2 |
| Answer» c | |
| 39510. |
Hi guys . I am ur new friend. Well tell me that where r u fromm |
| Answer» | |
| 39511. |
Ca + HNO3------>Actually i found different ans in different book. |
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Answer» 1 ca(NO3)2 +H22 No reaction Which one is correct No no Ca( No3)2 + H2 CaNo3+ H2 Ca(No3)2+H2 |
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| 39512. |
Difference between virtual and real image |
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Answer» 1.A real image can be caught on a screen whereas a virtual image cannot be caught on a screen.2. A real image is always inverted whereas a virtual image is always erect.3. A real image is formed when the rays of light after reflection or refraction actually meet at some point whereas a virtual image is formed when the rays of light after reflection or refraction appear to meet at a point. \tReal ImageVirtural ImageReal Images are formed by converging raysVirtual images are formed by diverging raysReal images can be projected or seen on a screenVirtual images cannot be seen or projected on a screen.Real images are formed by a convex lensVirtual images are formed by a concave lensA real image is always invertedA virtual image is always erect\t |
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| 39513. |
what r saturated hydrocarbon? |
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Answer» Saturated hydrocarbons are simple hydrocarbons having molecules with only single bonds. They consist of a carbon atom bonded to a maximum number of hydrogen atoms. Alkanes are saturated hydrocarbons and classified as a type of aliphatic hydrocarbon. Each single bond in a saturated hydrocarbon is a covalent bond. Saturated hydrocarbons are hydrocarbons that contain only single bonds between carbon atoms. They are the simplest class of hydrocarbons. They are called saturated because each carbon atom is bonded to as many hydrogen atoms as possible. In other words, the carbon atoms are saturated with hydrogen. |
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| 39514. |
What is difference in baking soda and baking powder?? |
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Answer» Baking soda _the chemical formula of baking soda is NaHCO3 .It is also known as Sodium hydrogen carbonate .Baking powder is made by baking soda and used for baking cake. \tBaking soda is pure sodium bicarbonate.\tBaking powder contains sodium bicarbonate, but it includes the acidifying agent already (cream of tartar), and also a drying agent (usually starch). Baking powder= Baking soda+ Tartaric acid..... |
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| 39515. |
How is ionic bond is different from covalent bond? |
| Answer» \tCovalent BondsIonic BondsFormed between two non-metalsFormed between a metal and non-metalHas definite shapeDon not have definite shapeChemical bonding between two non-metallic atomsElectrovalent bondsLow melting pointHigh melting pointContains hydro chloric acid and methaneContains sulphuric acid and sodium chlorideLow boiling pointHigh boiling pointGaseous or liquid in stateSolid state.\t | |
| 39516. |
How does graphite act as as a lubricant? |
| Answer» Graphite acts as a lubricant because graphite has a hexagonal structure and has a weak force of attraction called vander walls force of attraction that allows graphite structure to slip over each other. | |
| 39517. |
Why carbon forms covalent bond? |
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Answer» A carbon atom has four electrons in its outermost valence shell. So, it needs four more electrons to complete its octet. A carbon atom completes its octet only by sharing its valence electrons with other atoms. As a result, a carbon atom forms four covalent bonds by sharing valence electrons with other atoms. Covalent bond is a bond formed between 2 non metals as carbon is a non metal it forms covalent bond with another non metal Covalent bond is a bond between two non metals as carbon is a non metal it forms covalent bond with another non metal |
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| 39518. |
What is added to Fe to make it hard? |
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| 39519. |
Which disease is caused by lack of WBC |
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| 39520. |
Which two gases has replaced cfcs gas |
| Answer» Carbondioxide and methane | |
| 39521. |
Why sky is blue? |
| Answer» because molecules in the air scatter blue light from the sun more than they scatter red light. | |
| 39522. |
What is magnetic field difinition |
| Answer» Denoted by B. | |
| 39523. |
what is phenomenal of electric motor |
| Answer» Electric motor changes electrical energy into mechanical energy. | |
| 39524. |
What is control |
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| 39525. |
Chemistry reaction in simple ideas |
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| 39526. |
Diamond when we are burning then will be |
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| 39527. |
What is nuclear power |
| Answer» Nuclear power is generated by splitting atomic minerals. These elements are uranium and thorium. These fuels undergo nuclear fission in nuclear reactors and emit power. The nuclear power stations in India are located in Kalpakkam in Tamil Nadu and Tarapur in Maharashtra. | |
| 39528. |
What is balance chemical equation |
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Answer» it is a type of chemical equation where the law of conservation of mass is properly followed....that means mass of the reactants is equal to the mass of the products obtained in a chemical reaction. Equal number of atom in reactant and product ? |
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| 39529. |
what do you mean by diversity |
| Answer» Different type of organism which are living on this earth is diversity | |
| 39530. |
Define the following :1)pons varoli.2)medulla oblangata.3)cerebellum |
| Answer» \tPons Varolii:The pons is part of the brainstem, and in humans and other bipeds lies inferior to the midbrain, superior to the medulla oblongata and anterior to the cerebellum. The pons is also called the pons Varolii.\tMedulla oblongata : medulla oblongata is the continuation of the spinal cord within the skull, forming the lowest part of the brainstem and containing control centres for the heart and lungs.\tCerebellum :cerebellums the part of the brain at the back of the skull in vertebrates, which coordinates and regulates muscular activity. | |
| 39531. |
Explain nutrition in human beings in detail. |
| Answer» \xa0Nutrients are the substances in food that maintain the body and make it work. Most of what one eats is made up of carbohydrates, proteins, and fats. Nutrients needed in smaller amounts, but still vital, are vitamins and minerals. Also on the list are fiber and water. Our diet should comprise a mix of foods that supply all necessary nutrients in the right amounts. Such a diet is called a balanced diet.Carbohydrates: Complex carbohydrates, particularly starch, are found in foods such as pasta, bread, rice potatoes, and cereals.Fiber: This collection of stringy, indigestible substances is found in plant foods such as broccoli, beans, and bananas.\xa0Vitamins and Minerals: vitamins and minerals are nonetheless essential for growth and good health. Most vitamins come from fresh fruit and vegetables, with some also found in fish, meat, dairy, and eggs. Minerals, such as calcium and iron, also help the body perform optimally. The best sources are vegetables, dairy, meat, and some fish.Fats: Dairy food, meat, seeds, and nuts all supply fats, as do vegetable oils. Fat is digested into fatty acids, which are used as an energy source and to make cell membranes.Proteins: Rich sources of proteins are fish, lean meat, poultry, and beans. Once digested, proteins supply the body with amino acids.Water: Around 50 – 70 percent of our body is made of water. Therefore this amount should always be maintained in the body. | |
| 39532. |
Role of liver ,small intestine ,gall bladder,salivary gland. |
| Answer» \tThe\xa0liver\xa0has multiple\xa0functions, but its main\xa0function\xa0within the\xa0digestive\xa0system is to process the nutrients absorbed from the small intestine. Bile from the\xa0liversecreted into the small intestine also plays an important\xa0role\xa0in digesting fat.\tThe\xa0small intestine\xa0is the part of the\xa0intestines\xa0where 90% of the\xa0digestion\xa0and absorption of food occurs, the other 10% taking place in the stomach and largeintestine. The main\xa0function\xa0of the\xa0small intestine\xa0is absorption of nutrients and minerals from food.\tThe\xa0gallbladder\xa0is a small storage organ located inferior and posterior to the liver. Though small in size, the\xa0gallbladder\xa0plays an important\xa0role\xa0in our\xa0digestion\xa0of food. The\xa0gallbladder\xa0holds\xa0bile\xa0produced in the liver until it is needed for digesting fatty foods in the\xa0duodenum\xa0of the small intestine.\tThe\xa0salivary glands\xa0produce\xa0saliva, which keeps the mouth and other parts of the digestive system moist. It also helps break down carbohydrates (with\xa0salivaryamylase, formerly known as ptyalin) and lubricates the passage of food down from the oro-pharynx to the esophagus to the stomach. | |
| 39533. |
Difference between nephron and lungs |
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| 39534. |
Explain dot representation |
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| 39535. |
What is the asexual reproduction in plasmodium |
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| 39536. |
What is the common difference of an A.P in which a_21 -a_7= 84 |
| Answer» 6 | |
| 39537. |
What is DNA copy |
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| 39538. |
Name the compound ch3-ch2-ch2-ch2-c=ch |
| Answer» Ch3-ch2-ch2-ch2-ch2=ch2 it is hex-1-ene | |
| 39539. |
What acid present in lemon juice |
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Answer» The main organic acids contained in lemon are citric acid and malic acid. The sourness of citrus fruit is the taste of citric acid. Citric acid |
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| 39540. |
What is the principal of turbine |
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Answer» The principal of turbine is same as the principal of electromagnetic induction.. Principle of turbine is it converts hydel energy I to electrical energy It rotates and produces electricity |
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| 39541. |
Do concave mirror focal length is positive or negative |
| Answer» Concave mirror is negative focal length because concave mirror has real focus on left side of mirror | |
| 39542. |
What is genetics |
| Answer» Branch of science that deal with the Hereditary and variation. | |
| 39543. |
Write down digestion in mouth in stomach and digestion in small intestine |
| Answer» Digestion of food occurs in the following steps:\tMouth (Buccal cavity): The mouth contains teeth, which crush the food into small particles. Salivary glands present in the mouth secrete saliva, which moistens the food. It also contains enzyme salivary amylase which gets mix with food and form bolus. From here, food travels to the esophagus\xa0or swallowing tube. The esophagus is a muscular tube extending from the pharynx to the stomach.\xa0\tStomach-\xa0The stomach is a sac-like organ with strong muscular walls which acts like mixer and grinder.\xa0Gastric glands are present in the wall of the stomach which release following secretions:\tHydrochloric acid To make the medium acidic for the action of enzyme pepsin.Mucus To protect the inner lining of the stomach from the action of an acid.Pepsin A protein-digesting enzyme.\t\t\tSmall intestine\xa0is made up of three segments, the duodenum, jejunum, and ileum. The small intestine is a long tube loosely coiled in the abdomen\xa0It is the site of complete digestion of carbohydrates, proteins, and fats. It receives secretions from liver and pancreas.\tBile juice It is secreted by the liver and performs the following functions: It makes the medium alkaline for the pancreatic enzymes to act. It also breaks down large fat globules into smaller globules.Pancreatic juice It is secreted by the pancreas. It contains enzymes like amylase for digesting starch, trypsin for digesting proteins and lipase for breaking down emulsified fats.Intestinal juice It is secreted by the walls of the small intestine. It contains a number of enzymes such as maltase, lipase etc., for complete digestion\t\tColon -\xa0The final stage of the digestive system is the colon (large intestine) which absorbs water and salts before the remains are passed out of the rectum as faeces. The colon can also help to absorb remaining carbohydrate and some fats. | |
| 39544. |
Atom |
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| 39545. |
Explain IUPAC and its rules: |
| Answer» International Union of pure applied chemistry | |
| 39546. |
Write 4 point of metal and non metal |
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| 39547. |
Structure of benzene and explanation |
| Answer» https://en.m.wikipedia.org/w/index.php?title=Special:ZeroRatedMobileAccess&from=Benzene&to=/wiki/File:Benzene_Representations.svg | |
| 39548. |
Chapter how do organism reproduce question is that what is meant by sexual dimorphism |
| Answer» Sexual dimorphism:It is the differences in appearance between males and females of the same species, such as in colour, shape, size, and structure, that are caused by the inheritance of one or the other sexual pattern in the genetic material.Sexual dimorphism is the condition where the two sexes of the same species exhibit different characteristics beyond the differences in their sexual organs.\xa0 | |
| 39549. |
Largest gland |
| Answer» Liver | |
| 39550. |
How litmus paper become red or green but it\'s actual colour is purple |
| Answer» Litmus is a weakly acidic, colored organic dye. As its environment changes from acid (pH < 7) to base (pH > 7), the molecule changes from the protonated acid to the ionized salt. That\'s why its color also changes from red to blue. (The actual pH range for this color change is from about 4.5 to 8.3.) Because of this, litmus paper is widely used to distinguish between acids and bases. | |