This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
(a) addition polymer (b) thermosetting polymer (c) homopolymer (d) condensation copolymer (Nylon-66) |
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Answer» is B)........... |
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| 2. |
The polymer used in orthopaedic devices and in controlled drug release is (a) Orion (b) PTFE (c) SBR (d) PHBV |
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Answer» (d)PHBVExplanation:PHBV, is a polyhydroxyalkanoate-type POLYMER. ... PHBV is USED in speciality PACKAGING, orthopedic devices and in CONTROLLED release of DRUGS. |
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| 3. |
Which of the following has ester linkages? (a) Nylon (b) Bakelite (c) Terylene (d) PVC |
| Answer» C) Terylenehas EASTER LEAKAGE | |
| 4. |
Caprolactum is used for preparation of (a) Nylon-6 (b) Nylon-6,6 (c) Nylon 6, 10 (d) Nylon-2 – Nylon-6 |
| Answer» OPTION c is correct ANSWER,pls mark me down as brainiest answer!!! | |
| 5. |
What is Addison’s disease? |
| Answer» HEY MATE!!❤A disorder in which the adrenal glands don't PRODUCE enough hormones.A disorder in which the adrenal glands don't produce enough hormones.Specifically, the adrenal glands produce insufficient amounts of the hormone cortisol and sometimes ALDOSTERONE, too. When the body is under STRESS (e.g. fighting an infection), this deficiency of cortisol can result in a life threatening Addisonian crisis characterised by low blood pressure.h☺pe it helps!!❤please mark me as the brainliest!!❤@brainly.in♡♡SRITI♡♡ | |
| 6. |
The monomer of polystyrene is (a) C2H —CH=CH2 (b) CH2=CHCl (c) C6H5CH=CH2 (d) CH2=CH—CHO |
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Answer» option a is correct option.PLS pls MARK me down as BRAINIEST ANSWER!!!!! |
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| 7. |
Which of the following statements is not true? (a) Natural rubber is frans-polyisoprene (b) Buna-S is addition copolymer of butadiene and styrene (c) Natural rubber is cis 1, 4-polymer of isoprene (d) Vulcanisation makes rubber hard due to cross linkages with sulphur. |
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| 8. |
What is cause of hypothyroidism? What are symptoms? |
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Answer» A CONDITION in which the thyroid gland doesn't produce enough thyroid hormone.Hypothyroidism's DEFICIENCY of thyroid hormones can disrupt such THINGS as heart rate, body temperature and all aspects of metabolism. Hypothyroidism is most prevalent in older women.Major symptoms INCLUDE fatigue, cold SENSITIVITY, constipation, dry skin and unexplained weight gain.pls pls mark me down as brainiest answer!!!! |
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| 9. |
hope the given Chemistry MCQs for Class 12 with Answers Chapter 14 Biomolecules will help you. If you have any query regarding CBSE Class 12 Chemistry Biomolecules MCQs Pdf, drop a comment below and we will get back to you at the earliest. |
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| 10. |
What are non-steroid hormones? Name any one non-steroid hormone. |
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Answer» Non-steroid hormones such as insulin are endocrine hormones made of amino ACIDS that bind to receptors on the surface of target cells. This activates an enzyme in the plasma membrane, and the enzyme controls a SECOND messenger molecule, which INFLUENCES cell processes. EX: endocrine hormones. |
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| 11. |
I am asking about how many n in 1liter H2SO4 |
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Answer» tion:1 N of a litre of any solution represents one GRAM equivalent of that solute dissolved in the solvent. One gram equivalent is simply the equivalent WEIGHT expressed in gram . The equivalent WT. Of H2SO4 is 49 g.please mark me branly |
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| 12. |
Why is ice at 0 C more effective in cooling than water at the same temperature? |
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Answer» Answer: Ice is more effective in cooling than WATER at the same temperature because ice can absorb latent HEAT as well as the heat energy in order to attain ROOM temperature. Water at 0 C can absorb heat energy only to attain the room temperature.Mark me branlist |
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| 13. |
6) Movement of particle depends into……………………. 7) Molecules holds togetger due to ………………………………10) Amongst the liquids ………………………..is only lustrous.12) Effect of pressure of…………………is very low among solid, liquid and gas. 16) Pure water freezes at ………………… degree C17) During chemical change, the original substance is called……………………….18) During chemical change, the new substance which is formed is called………23) ………………………is a proces in which a substance in solid state changes into liquid state at particular temperature.27) …………………………….is necessary to decompose water into its constituent elements hydrogen and oxygen.please help I have exam tomorrow.please help |
| Answer» HIIII MATE,HOPE this HELPS you...✌️✌️mark me as BRAIENLIEST...❤️❤️❤️❤️❤️ | |
| 14. |
What is the ions tell about |
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Answer» is an ATOM or molecule that has a net ELECTRICAL charge. SINCE the charge of the ELECTRON is equal and opposite to that of the proton, the net charge of an ion is non-zero DUE to its total number of electrons being unequal to its total number of protons.Mark as brainliest answer |
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| 15. |
On dissovong bases in water produces ionss |
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Answer» Acids are substances that whendissolved in water release HYDROGEN ions, H+(aq). Bases are substances that react with and NEUTRALISE acids, producing water. When dissolved, bases release hydroxide ions, OH-(aq) into solution.MARK IT AS BRAINLEST ANSWER PLEASE AND GIVE ME 5 STARS |
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| 16. |
Balance the following question by using LCM method Zn(no3)2=zno+no2+o2 |
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Answer» 2 Zn(NO3)2 → 2 ZnO + 4 NO2 + O2This is an oxidation-reduction (redox) reaction:4 NV + 4 e- → 4 NIV(reduction)2 O-II - 4 e- → 2 O0(oxidation)Zn(NO3)2 is an oxidizing agent, Zn(NO3)2 is a reducing agent.Reactants:Zn(NO3)2 – Zinc nitrate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04Other names: Zinc dinitrate source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Zinc(II) nitrate source: wikidata, accessed: 2019-09-02, Nitric ACID, zinc salt source: ICSC, accessed: 2019-09-04Appearance: Colorless, deliquescent crystals source: wikipedia, accessed: 2019-09-27; Colourless crystals or powder source: ICSC, accessed: 2019-09-04Products:ZnONames: Zinc oxide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Zinc white source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Calamine source: wikipedia, accessed: 2019-09-28Appearance: White solid source: wikipedia, accessed: 2019-09-28; White powder source: ICSC, accessed: 2019-09-04; White, odorless solid. source: NIOSH NPG, accessed: 2019-09-02NO2 – Nitrogen dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02Other names: Nitrogen(IV) oxide source: wikipedia, accessed: 2019-09-27, Deutoxide of nitrogen source: wikipedia, accessed: 2019-09-27, Nitrogen peroxide source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02Appearance: Brown gas source: wikipedia, accessed: 2019-09-27; Reddish-brown gas or brown or yellow liquid with PUNGENT odour source: ICSC, accessed: 2019-09-04; Yellowish-brown liquid or reddish-brown gas (above 70°F) with a pungent, acrid ODOR. [Note: In solid form (below 15°F) it is found structurally as N2O4.] source: NIOSH NPG, accessed: 2019-09-02O2Names: Dioxygen source: wikidata, accessed: 2019-09-07, OXYGEN source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, Oxygen (liquefied) source: ICSC, accessed: 2019-09-04Appearance: Odourless compressed gas source: ICSC, accessed: 2019-09-04; Liquefied gas. colourless-to-blue extremely cold liquid source: ICSC, accessed: 2019-09-04Explanation:plz follow and mark my ans as brainnest |
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| 17. |
Aldopentoses named as ribose and 2-deoxyribose are found in nucleic acids. What is their relative configuration? |
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Answer» 'D' CONFIGURATION....... |
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| 18. |
Which vitamin is linked with anti-sterility? [DoE] |
| Answer» VITAMIN A,B,DMark as BRAINLIEST | |
| 19. |
Out of the following groups, which group has all fat soluble vitamins: (a) A, B-Complex, C, D (b) A, D, E, K (c) K, B-Complex, A, E (d) C, A, E, D. |
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Answer» is a)............. |
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| 20. |
Name the deficiency diseases resulting from lack of vitamins A and E in the diet. [Delhi 2013(C); 2011(C); DoE] |
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| 21. |
How do enzymes help a substrate to be attacked by the reagent effectively? |
| Answer» SWER is in HINDI | |
| 22. |
What are biocatalysts? Give an example. [Foreign 2014] |
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Answer» Hope so it is helpful.. Pls follow me.. Like.. Mark me as brainliest.. Thankyou Explanation:Biocatalysis refers to the USE of living (biological) systems or their parts to SPEED up (CATALYZE) chemical REACTIONS. In biocatalytic processes, natural CATALYSTS, such as enzymes, perform chemical transformations on organic compounds. |
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| 23. |
Some enzymes are named after the reaction, where they are used. What name is given to the class of enzymes which catalyse the oxidation of one substrate with simultaneous reduction of another substrate. |
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Answer» enzymes which CATALYSES the oxidation of ONE substrate with simultaneous REDUCTION of another substrate is known as oxidoreductase enzymes. |
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| 24. |
What are the structural changes found during denaturation of proteins? |
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Answer» Denaturation of proteinsinvolves the disruption and possible destruction of both the secondary and tertiary structures. Since denaturationreactions are not strong enough to BREAK the peptide BONDS, the primarystructure (sequence of amino acids) REMAINS the same after a denaturationprocess.As INDICATED by Lewis structures, which of the following species could probably not exist as a stable molecule?EXPLANATION:pls mark me as brainliest ❣❣ |
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| 25. |
Give an example for each of the fibrous protein and globular protein. [AI 2016] |
| Answer» FIBROUS proteins are STRUCTURAL proteins which are involved in the formation of bones, MUSCLES, connective tissues, etc. Keratin and collagen are some examples of fibrous protein.Globular proteins are an important part of the biological processes in LIVING organisms. They act as TRANSPORT proteins, enzymes, hormones, etc. Some examples of globular proteins are haemoglobin, alpha immunoglobulin, beta immunoglobulin, etc | |
| 26. |
What type of bonding occurs in P-pleated structure of proteins? |
| Answer» PLEASE MARK asbrainlist please | |
| 27. |
Write the name of linkage joining two amino acids. [AI 2013] |
| Answer» WRITE the name of linkage joining two amino ACIDS. The linkage which joins the two amino acids is known as PEPTIDE linkage.PLEASE MARK ME AS BRAINLIST ANSWERS PLEASE PLEASE REQUESTING | |
| 28. |
Give any two examples of essential amino acids. |
| Answer» ESSENTIAL amino acids cannot be made by the BODY. As a result, they must come from food.The 9 essential amino acids are: histidine, isoleucine, LEUCINE, lysine, METHIONINE, phenylalanine, threonine, tryptophan, and valine. | |
| 29. |
Calculate mass % of solution prepared using 12g NaOH & 90g water Also calculate its molality |
| Answer» MASS %= 12/102×100 = 11.8 %no. of mole NaOH = 12/ MOLARS mass= 0.3molality= mole of solute/ mass of solutions in KG = 0.3/0.09(kg) = 33.3 m | |
| 30. |
Write the state of a matter.Why do state of matter arise? |
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Answer» there are THREE STATES of matter solid, LIQUID , gas and plasma. |
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| 31. |
when 10g. of sodium chloride is added in 100ml. of water , how does it affect the vapour pressure of water ? plz .. quick ans. i am waiting .... |
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Answer» Vapour pressure will decreaseExplanation:BOILING point is TEMPERATURE at which the vapour pressure gets equal to atmospheric pressure. Now when we ADD Nacl or salt to water, the salt being non volatile would TAKE some area of water and would DECREASE the vapour pressure of water. This would mean that the boiling point of the solution would be achieved earlier when compared to pure water. |
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| 32. |
Why should not wear clothes made of synthetic fibres while working in kitchen? |
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Answer» ☑️SYNTHETIC fibres like Polyester catches fire very EASILY and melts. After melting It sticks to the body of the person WEARING it causing SEVERE burns. Hence it is advised not wear synthetic clothes while working in the Kitchen. Its advised to wear Apron or cotton clothes while cooking in Kitchen.Hope it's HELP you___✌️❤️✔️ |
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| 33. |
Colour of lead iodide yellow red green reddish Brown |
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Answer» yellowExplanation: |
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| 34. |
1 liter of 0.01 n HCl solution |
| Answer» EXPLANATION:The balanced chemical EQUATION is:-CaCO3 + 2HCl = CACL2 +CO2 + H2O1L of 1N HCl= 1mole of HCl= 36.5gSince 100g of CaCO3 is required to react with 73g if HCl, there will be limiting REAGENT of HCl in this reaction.73g HCl gives out 44g CO236.5g HCl gives out 22G CO2Read more on Brainly.in - brainly.in/question/3053089#readmore | |
| 35. |
How do the position of elements help to know the chemical properties of element? |
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Answer» In addition, the TOTAL number of electron SHELLS an atom DETERMINES which period it belongs to. Because of its STRUCTURE, the periodic table has become an extremely useful tool for assessing and predicting elemental and chemical trends. |
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| 37. |
The maximum no. of electrons which third period can have ,with explanation. |
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Answer» REMARK AS BRAINLISTNO OF SHELLS = PERIOD NOSO 3RD PERIOD WILL HAVE 3 SHELLSTHEREFORE THE MAX ELECTRONS IN 3RD PERIOD CAN BE 8 |
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| 38. |
What is air and four gases present in the air |
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Answer» ng to NASA, the GASES in Earth's atmosphere include:Nitrogen — 78 percent.Oxygen — 21 percent.Argon — 0.93 percent.Carbon dioxide — 0.04 percent.Trace amounts of neon, HELIUM, methane, KRYPTON and hydrogen, as WELL as WATER vapor.HOPE IT HELPS...MARK AS BRAINLIEST... |
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| 39. |
Why do amino acids show amphoteric behaviour? [Uttarakhand 2019] |
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Answer» hii mate Explanation:Amphoterism refers to a property to act as acids n bases...n molecules of amino acids CONTAINS both ACIDIC n basic groups...HENCE it shows amphoteric behavior....MARK me brainlest ☺️ thank my ANSWER ♥️ |
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| 40. |
Out of a, p and y amino acids, which ‘ amino acids are obtained by hydrolysis of proteins? Give its general structure. |
| Answer» BAHI itne bahri ques KYU puchte HO mughe nahi PATA | |
| 41. |
Which component of starch is a branched polymer of D-glucose and insoluble in water? [CBSE Sample Paper 2018; Delhi 2014] |
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Answer» AmylopectinAmylopectin COMPONENT of STARCH in branched POLYMER of a glucose and INSOLUBLE in water. |
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| 42. |
Name animal starch. Why is it called so? |
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Answer» It is SOMETIMES called 'animal starch' because it is the MAJOR CARBOHYDRATE storage product of animals, in which it is stored as small GRANULES mainly in the MUSCLES and the liver.pls mark me down as brainiest answer!!! |
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| 43. |
Name the two components of D-glucose which constitute starch. [Foreign 2014] |
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Answer» and AMYLOPECTIN are the TWO COMPONENTS of D-glucose which CONSTITUTE STARCH |
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| 45. |
Which of the two components of starch is water soluble? [Delhi 2014; DoE] |
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| 46. |
Which monosaccharide units are present in starch, cellulose and glycogen and which linkages link these units? |
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Answer» In glycogen as WELL as in starch, α-GLYCOSIDIC LINKAGE is present in the glucose UNITS. In cellulose, the glucose units are linked by β- glycosidic linkage. |
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| 47. |
Monosaccharides contain carbonyl group hence are classified as aldose or ketose. The number of carbon atoms present in the monosaccharide molecule are also considered for classification. In which class of monosaccharide will you place fructose ? |
| Answer» HENCE, are CLASSIFIED as ALDOSE or ketose. When ALDEHYDE group is present, the monosaccharides are known as aldose. When KETONE group is present, the monosaccharides are known as ketose. | |
| 48. |
What are the products of hydrolysis of maltose? [AI 2014] |
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Answer» Maltose is produced by the enzymatic hydrolysis of starch (a homopolysaccharide) catalyzed by the enzyme amylase. Maltose is further HYDROLYZED by the enzyme MALTASE to PRODUCE two molecules of d-glucose.pls mark me down as a brainiest answer!!!! |
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| 49. |
Why does compound (A) given below not form an oxime? |
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Answer» Why does compound (A) GIVEN below not form an oxime?EXPLANATION:THUS isn't me answer |
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| 50. |
Sucrose is dextrorotatory but the mixture obtained after hydrolysis is laevorotatory. Explain. |
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Answer» Sucrose is dextrorotatory. On hydrolysis, it PRODUCES a mixture of glucose and fructose having specific rotation +52.5∘ and -92.4∘. Thus, the respectively NET RESULTANT mixture become laevorotatory. Hence, the mixture is laevorotatory and product is known as INVERT sugar. |
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