Saved Bookmarks
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.
| 44901. |
Give balancing questions? ? ( chemistry 1 chapter ) |
| Answer» | |
| 44902. |
What is chlor alkali process? |
|
Answer» When electricity is passed through an aqueous solution of sodium chloride (brine), it decomposes to form sodium hydroxide. This process is called chlor-alkali process. 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(g) + H2(g)\xa0Sodium chloride Sodium hydroxide Chlorine gas\xa0 Refer to page number, 30 in NCERT book of science You understand briefly |
|
| 44903. |
Preparation, uses and formula of bleaching powder, baking soda, washing soda, P.O.P, NaOH. |
|
Answer» Baking soda formula is sodium hydrogen carbonate (NaHCo3). Washing soda formula is sodium carbonate decahydrate (Na2Co3×10H2o). P.O.P. formula is calcium sulphate hemihydrate (CaSo4×half H2o Bleaching powder formula is calcium oxichloride Brief in NCERT |
|
| 44904. |
Fresh milk has PH of 6 do you think that will change if we converted into curd |
| Answer» Yes it will become acidic | |
| 44905. |
PH related questions |
| Answer» Acid rain, pH of soil in your garden, pH of your stomach, pH of mouth | |
| 44906. |
Distilled water do not conduet electricity where as rain water do |
|
Answer» Distilled water which is a pure form of water, is neither acidic nor basic in nature. So distilled water does not dissociate into ions. Since, conduction of electricity requires free ions so, distilled water does not conduct electricity.Rain water being an impure form of water, contains many ionic species. These ions are responsible for electrical conductivity of rain water . Because rain water contains ions where as distilled water doesn\'t |
|
| 44907. |
Why should curd and sour substance should not be kept in bross and vessed |
|
Answer» \tAll acids are sour in nature. \tCurd,is made from milk which is slightly acidic in nature(as it contains lactic acid).we know that acids react easily with metals to give salt and hydrogen gas. \tWhen kept in copper or brass vessels,curd(and other acidic food items) reacts with copper and forms toxic compounds which may be unfit for human consumption,and may cause food poisoning.thus it is not advisable to keep curd and other acidic or sour food items in copper or brass vessels. Because curd and sour substances contain acid , and the acid will react with the brass and other metal vessels to form harmful substances |
|
| 44908. |
What is corrosion and ranedity |
|
Answer» Corrosion- it is the process in which metals are eaten up gradually by the action of air , moisture or a chemical (such as an acid ) on their surface .Rancidity- the condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called rancidity. Corrosion is an irreversible interfacial reaction of a material (metal, ceramic, polymer) with its environment which results in consumption of the material or in dissolution into the material of a component of the environment.Rancidity The development of unpleasant flavours in oils and fats as a result of oxidation. |
|
| 44909. |
What is antioxidants and oxidising agent |
|
Answer» \tA substance or a compound which inhibits the oxidation of other substances is referred as antioxidant. Oxidation of compounds produces reactive intermediates which are harmful. So antioxidants prevent oxidation and formation of reactive substances.\tSome substances such as alkaline potassium permanganate and acidified potassium dichromate are capable of adding oxygen to others. These are known as oxidising agents. Antioxidants are the substances that prevent oxidation of food .Ex- BHT and BHA Oxidising agent are those who oxidise other or simply the substance which itself get reduced |
|
| 44910. |
What is the exothermic and endothermic reaction |
|
Answer» Exothermic reactions: Those reactions in which energy is released in the form of heat are called exothermic reactions.All combustion reactions e.g. CH4 + 2H2O → CO2 + 2H2O + HeatEndothermic reactions: Those reactions in which energy is absorbed are called endothermic reactions.Examples – CaCO3\xa0 (Heat)→ CaO + CO2 The reactions in which heat is evolved as a product is called exothermic reaction .The reactions in which heat is required to complete a reaction are called endothermic reactions |
|
| 44911. |
What is the balanced chemical reactions |
| Answer» The balanced chemical reaction is a reaction in which the number of atoms of the elements remains same before and after the reaction. Hence, we need to balance skalatel chemical reactions. | |
| 44912. |
Why does the colour of copper sulfate Sol. changes when iron nail is dipped in it |
| Answer» It is because iron displaces copper from its compound that is CuSO4 and forms FeSO4 beacause iron is more reactive than copper that\'s why copper sulphate solution colour blue changes as iron sulphate is formed with pale greenish colour | |
| 44913. |
Why right kidney is lower than the left kidney ?? |
| Answer» Because God made it so | |
| 44914. |
Why the sexual reproduction is nessecary |
| Answer» To maintain continuation of species and also helps or boosts variation | |
| 44915. |
What is the work of pepsin enzyme |
| Answer» Pepsin is an endopeptidase that breaks down proteins into smaller peptides (that is, a protease). It is produced in the stomach and is one of the main digestive enzymes in the digestive systems of humans and many other animals, where it helps digest the proteins in food. it digest proteins. | |
| 44916. |
Write an equation for decomposition reactions where energy is supplied in the form of electricity |
|
Answer» 2H2o=H2+o2 Caco3--------- cao + co2. (heat energy) Caso4----------ca+ + so4- (electrical energy) |
|
| 44917. |
In modern periodic table, the period without ameal isA.period1B.period 2C.period 3D.peripd 4 |
| Answer» What is ameal? | |
| 44918. |
What is monosaccharides, |
| Answer» Monosaccharides, also called simple sugars, are the simplest form of sugar and the most basic units of carbohydrates. They cannot be further hydrolyzed to simpler chemical compounds. The general formula is C ₙH ₂ₙO ₙ. They are usually colorless, water-soluble, and crystalline solids. | |
| 44919. |
What is endothermic reaction with example |
|
Answer» heat is required it is a type of reaction in which heat energy is not evolved (absorbed)for example 2H2+O2=2H2O |
|
| 44920. |
What makes the cake soft and spongy |
|
Answer» Don\'t confuse Ronot confuse Sodium bicarbonate Baking soda Yeast... Baking powder Baking soda |
|
| 44921. |
What is cakcium |
| Answer» | |
| 44922. |
State the purpose for making urine |
|
Answer» Purpose of excreting urine is to remove the nitrogenous waste like urea (uric acid), excess salts, water from the body so that these toxic substance don\'t harm our body. Urine extracted the soluble wastes from the blood for expulsion out of the body |
|
| 44923. |
Describe the mechanism of breathing in human beings |
| Answer» In human beings, as in most vertebrates and mammals, gaseous exchange occurs in a pair of lungs. They are enclosed in an air-tight compartment called thorax (or chest).This region is bound by the ribs and the diaphragm. Several organs participate in the process of respiration in human beings. They are the nasal cavity, larynx, trachea, bronchi, alveoli and lungs. Air is inhaled or exhaled by the body as lungs are expanded or contracted by the simultaneous contraction and expansion of muscles attached to the ribs and diaphragm. The air containing oxygen is taken in through the nose where it is filtered and cleaned from dust particles, bacteria and other foreign substances by the mucus (stick liquid) and hair present in the nostrils. This air then passes through the larynx, the voice-box chamber situated in the neck region, to reach the tracheal tube or the windpipe. The trachea is a tube that runs from the larynx down the neck region into the thorax. From the thorax air reach the alveoli through bronchioles. | |
| 44924. |
What is the ph value of tooth? why? |
|
Answer» No tooth has the ph 5.5 only because of the presence of salivary amylase and lysosome.It doesnt cause dental plaque. 5.5 The ph scale goes from 1 to 14 ,with a ph of 1 , being the most acidic and 14 being the most alkaline A Ph of 7 is neutral the ph of pure water is very close to 7 at a ph of 5.5 the teet being to demineralize putting them at risk for cavities,A Healthy mouth in a neutral ph range .. It has a ph of near 7.5,..... becoz at a ph of 5.5 a i.e, in acidic medium it can cause the pH in the dental plaque to fall rapidly below....... |
|
| 44925. |
What is deffrent between anabiotic gas and biotic gas |
| Answer» | |
| 44926. |
Surface area an volume kisko achaa lagta hai |
| Answer» | |
| 44927. |
??????????sorry |
| Answer» | |
| 44928. |
Bio gas contain mainly which gas |
|
Answer» Methane Methane ( CH4) Methane |
|
| 44929. |
What do u mean by catalyst |
| Answer» Catalyst helps in reaction but does not take part in the reaction.For ex..nickel catalyst or palladium. | |
| 44930. |
Recesive |
| Answer» | |
| 44931. |
Six specific characteristics of sexual reproduction |
| Answer» | |
| 44932. |
What is elephantiasis |
| Answer» Elephantiasis\xa0refers to a parasitic infection that causes extreme swelling in the arms and legs. The disease is caused by the filarial worm, which is transmitted form human to human via the female mosquito when it takes a blood meal. The parasite grows into an adult worm that lives in the lymphatic system of humans. | |
| 44933. |
What is the colour of copper sulphate solution |
|
Answer» Blue Blue Blue |
|
| 44934. |
Why a current carrying conductor placed in a magnetic field experience a force? |
| Answer» When a current-carrying conductor is placed in a magnetic field the wire experiences a force due to the interaction between the field and the magnetic field produced by the moving charges in the wire.The current carrying conductor generates it own magnetic field around it. This interracts with the external magnetic field. When two magnetic fields interact there will be attraction and repulsion between them based on the direction of the external magnetic field and the direction of the current in the conductor. That is why the conductor experiences a force. | |
| 44935. |
What is sustainable |
| Answer» Its full name is sustainable development . It means to use natural resources judicially and carefully and also to take care of the needs for future generations | |
| 44936. |
What is the difference between antigen and antibodies? |
| Answer» \tS.N.AntigenAntibody1Generally proteins but can be lipids, carbohydrates or nucleic acids.Antibodies are proteins.2Triggers the formation of antibodies.Variable sites has the antigen binding domain.3There are three basic kinds of antigens. (Exogenous,\xa0Endogenous and Autoantigens)There are five basic kinds of antibodies. (Immunoglobulins M, G, E, D and A)4The region of the antigen that interacts with the antibodies is called epitopes.The variable region of the antibody that specially binds to an epitope is called paratope.5Cause disease or allergic reactions.Protects the body by immobilization or lysis of antigenic material.\t | |
| 44937. |
Blood transfusions |
| Answer» | |
| 44938. |
Define Homologous serious ... |
|
Answer» I am not uesd fb Vedanshi....... My name is Kabir Bansal (Baisla)...i m also a gurjar...... From Baghpat district...... Actually now Lives in Delhi ......so I want to say that... Please send me friend request on facebook... My ID is on facebook with the name.... Kabir Baisla........ On my profile picture you see a red color Image..... USS par likha hua hai.... Ookad hai dp dekhne ki...... And meri cover photo par ganesh ji hai ...... |
|
| 44939. |
Why is 24 carat gold not used for making jewellery ??? |
|
Answer» 22 carat gold is used for making jewelleries Because it is so soft and easy break That was why pure gold (24 carat ) not use for making jewellary . |
|
| 44940. |
Why does diamond glitter??? |
| Answer» \xa0Its due to Total internal reflection , TIR.When the light rays enter diamond it acts as a prism and disperses the light in its seven constituent colours and after when these colours strike the others surface of diamond TIR takes place and then after emerging the white light again combines into white light and we see the diamonds as if they are sparkling | |
| 44941. |
Kokon gaemats nikalta hai |
| Answer» | |
| 44942. |
Formula of carboxylic acid |
| Answer» COOH...... and its general formula is CnH2n+COOH...... | |
| 44943. |
Difference between reflex action and involuntary action in 3 best points. |
| Answer» \tReflex actionsInvoluntary actions1. Rapid automatic responses to a stimulus without the conscious involvement of the brain1. Occurs without the conscious choice of an organism2. Controlled by spinal cord2. Controlled by mid brain or medulla oblongata3. Very quick and instantaneous3. Relatively slower4. May involve any muscle or a gland\xa04. Involves only smooth muscles5. Can be conditioned5. Cannot be influenced by external conditioning Examples: Blinking of eyes, salivationExamples: Beating of heart, blood circulation\t | |
| 44944. |
What is universal indector |
|
Answer» Universal indicator is mixture of different indicators that is used to test the strength of an acid or a base. a mixture of dyes that changes colour gradually over a range of pH and is used (especially as indicator paper) in testing for acids and alkalis. |
|
| 44945. |
Why do stars twinkle but planet do not? |
|
Answer» It is because stars are far away and planets are near to us so every point cannot reach our eye this why planets donot twinkle . Because of the atmospheric we see twinkling effect as we see the apparent position of the star. The planet are closer to the earth as compared to the stars so the light receive from the planets must greater and the fluctuation caused in the amount of light due to the atmospheric reaction are negligble as a compared to the amount of a light receive from them so that our planets do not twinkle. Stars twinkle because … they’re so far away from Earth that, even through large telescopes, they appear only as pinpoints. And it’s easy for Earth’s atmosphere to disturb the pinpoint light of a star. As a star’s light pierces our atmosphere, each single stream of starlight is refracted – caused to change direction, slightly – by the various temperature and density layers in Earth’s atmosphere. |
|
| 44946. |
Cbse class 10 science lab manual |
| Answer» | |
| 44947. |
Why sodium float on watet |
|
Answer» Because it has less density Because it has very less density. Cuz it\'s density is lower frm water |
|
| 44948. |
Name 5port of india? |
| Answer» Kandla haldia tuticorin vizag mumbai kolkata | |
| 44949. |
What is the function of insulin hormone? |
|
Answer» Insulin is secreted by beta cell of isolate of langerhans insulin Helps to lower the blood glucose level and control the blood sugar level and Insulin do the disease which name is Diabetes mellitus in this patient excretes the high amount of sugar with urine To control blood sugar level in body Insulin hormone is secreted by pancreas. It\'s function is to control blood sugar level in the body.. It decreathe sugar level in blood... if necessary |
|
| 44950. |
Who were the jobbers an what is role if jobber? |
|
Answer» Java is a person who helps to collect the people from villages for the job earlier time they have a very bigger importance in collecting the villages for the job Female ? |
|