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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 sound signal is simultaneously sent in air and water from a boat on a river. The echo of sound striked by river bed is heard in 4s, while echo striked by aeroplane is heard in 8s. Find the distance between aeroplane and river bed [velocity of sound in air = 350m/s, velocity of sound in water =1500m/s.1) 4.4km2) 6.7km3)8.8km4)13.4km |
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Answer» Answer: 4.4kmExplanation: Time taken to hear echo is half the time taken to cover the DISTANCE. As for echo we have to TRAVEL twice the distance. Distance TRAVELLED in river, sriver=vrivertriver=1500×2=3000m Distance travelled in AIR, sair=vairtair=350×4=1400m stotal=sriver+sair =(3000+1400)m=4400m=4.4km |
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| 2. |
Which of the following is weakest ? ionic bond , covelent bond , mettalic bond , van ders forces |
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Answer» yes , Out of the given options, VAN der WAAL forces are the weakest. van ders forces. Explanation: I hope it helps you. Be HAPPY. |
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| 3. |
Which of the following have the small size . na,na+ , na- , cl+ |
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Answer»
★ which of the following have the small size . na,na+ , na- , cl+ Na+ a rational number is a number such as -3/7 that can be expressed as the QUOTIENT or fraction p/Q of two integers, a numerator p and a non-zero denominator q. EVERY INTEGER is a rational number: for example, 5 = 5/1. |
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| 4. |
When we touch iron is Cooler Than wood why |
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Answer» Explanation: Even THOUGH they are the same TEMPERATURE, the metal will feel COLDER than the wood because of the thermal conductivity of the metal, compared to the wood. Metal will conduct the HEAT to your hand (or whatever you touched the metal with) faster. |
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| 5. |
How can you prove that iron is a good conductor of heat |
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Answer» Answer: We OBSERVE that temperature RISES than before,when we TOUCH an iron rod FEEL very hot. We conclude that iron is a good conducter of HEAT. Take a iron rod,place it in sunlight. After few hours take it. Calculate heat using a termometer. |
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| 6. |
Calculate the no.of moles are present in 60g of Ca. |
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Answer» Answer: Here's Your Answer The MOLES PRESENT in 60 g of calcium are 1.5 moles. |
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| 7. |
Give your own opinion about1. Which of the forces related to India’s security would you like to join? Why? |
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Answer» Answer: I like to join in navy force Explanation: |
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| 8. |
LONG ANSWER QUESTIONS1. What is an atom according to Rutherford's nuclear model of the atom ? How stability of an atom isensured while Niels Bohr pointed out Rutherford's atom to be highly unstable ? |
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Answer» Answer: 1234567890qwertyuiopasdfghjklxxcvbnm123456 |
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| 9. |
The average speed of fox,lion,horse, cheetah |
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Answer» Explanation: Technology ("science of CRAFT", from Greek τέχνη, techne, "ART, skill, cunning of hand"; and -λογία, -logia) is the sum of techniques, SKILLS, methods, and processes used in the production of GOODS or services or in the accomplishment of objectives, such as SCIENTIFIC investigation. |
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| 10. |
2 Incorrect among the following is/are(a) Number of electrons having m = 0 in Na are 7(b) Energy of 4s orbital is more than 3d in H-atom(c) Energy of 2s orbital in O is more than carbon(1) (a) only(2) (b) only(3) (a) & (b) only(4) (c) onlyver 8 Pusa |
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| 11. |
If 15.0 g of NaN3 is in a airbag, how much Nitrogen gas can be produced? |
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| 12. |
How can you explain screening effect? |
Answer» SCREENING effect is also known as the shielding effect. The phenomenon which occurs when the NUCLEUS reduces its force of ATTRACTION on the valence electrons DUE to the PRESENCE of electrons in the inner-shell. |
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| 13. |
Which of the following has the smallest size? (a) Na (b) Na+ (c) Na- (d) Cl+ |
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Answer» C) Na- Explanation: |
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| 14. |
Identify the corresponding cases in each of the following:- n=4,l=2 |
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Answer» Answer: n=2, so that l can be either 0 or 1, according to the rule in L = √ l ( l + 1 ) h 2 π . Similarly, for n=3, l can be 0, 1, or 2. It is often most convenient to state the value of l, a SIMPLE integer, rather than calculating the value of L from L = √ l ( l + 1 ) h 2 π . For EXAMPLE, for l = 2, we see that L = √ 2 ( 2 + 1 ) h 2 π = √ 6 h 2 π = 0.390 h = 2.58 × 10 − 34 J ⋅ s It is much SIMPLER to state l = 2. |
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| 15. |
दक्षिणी-पश्चिमी मानसून के द्वारा चेन्नई में कम वर्षा क्यों होती है?हो रहता हैT |
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Answer» Answer पश्चिमी घाटों को पार करने के बाद, ये हवाएँ पश्चिम के घाटों के लीवर की ढलान पर उतरती हैं, जहाँ पर ज़्यादा बारिश नहीं होती है। ... तो, चेन्नई में ये हवाएँ कम वर्षा देती हैं। |
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| 16. |
Among Na and Mg which one has high ionisation enargy |
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| 17. |
0.4. Hydrogen gas is obtained from natural gas bypartial oxidation with steam as per followingendothermic reaction,CH. (g) + H2O (9)CO (g) + 3H2(g)(a) Write an expression for K, for the above reaction.(b) How will thevalue of K, and composition ofequilibrium mixture be affected by) Increasing the pressure(ii) Increasing the temperature(iii) Using a catalyst |
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Answer» jsskskkskwkwkkkwkkwkkwkwkwkkwkwkwkw6kwwkwkwk Explanation: jqjqjjjqjwjwjjqqjwjqjjqjjjqjqjqjqjqjqjjqjqjqjqjqjqjqjqjqjjqjqjqjqjqjqjqjqjqjqjqjqjqjqjjqjqjqjqjqjqjqjjq5jqjqjq |
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| 18. |
58) The molecular weight of the solute isdouble than that of solvent and theweight of solute is 1/10th that of solventThe V.P. of pure solvent is 200mm Hg.The lowering of V.P. in the solution is1) 20mm Hg2) 100mmHg3) 10mm Hg4) 40mm Hg |
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Answer» Answer: 1..... gud MORNING I am new now.... PLZ follow me....
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| 19. |
AIO:- Chemical bond formed between a metal and a non metal is |
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Answer» Answer: CHEMICAL BOND FORMED between a METAL and a non metal is Ionic BONDS are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. |
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| 20. |
Explain hydrogen bonding with the help of an example |
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Answer» Answer: Hydrogen-bond definitions Explanation: The definition of hydrogen bond is a chemical bond between the hydrogen ATOM and an electronegative atom. An example of hydrogen bond is WATER molecules BONDING together in the form of ice. ... if BRIDGING two similar electronegative atoms or GROUPS from two different molecules. |
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| 21. |
Define Ionisation enthalpy |
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Answer» Explanation: Ionization ENTHALPY of elements is the amount of energy that an isolated gaseous ATOM requires to lose an electron in its GROUND state. LOSING of electrons RESULTS in the formation of cations. |
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| 22. |
What is Principle Quantum number ? |
Answer» ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️What is PRINCIPLE QUANTUM NUMBER ?❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️ |
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| 23. |
Fixed mass of an ideal gas at 290 K and 1 atm pressure occupied volume of 0.2 m3 Calculatethe volume of the gas if pessure and temp. are changed to 1.2159 x 10pa and 253 Krespectively. |
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Answer» Answer: Fixed mass of an IDEAL GAS at 290 K and 1 atm pressure occupied volume of 0.2 m3 Calculate. the volume of the gas if pessure and temp. are changed to 1.2159 x 10PA and 253 K. respectively. Explanation: Fixed mass of an ideal gas at 290 K and 1 atm pressure occupied volume of 0.2 m3 Calculate. the volume of the gas if pessure and temp. are changed to 1.2159 x 10pa and 253 K. respectively. |
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| 24. |
ammonia gas can be produced by heating together the solid NH4Cl and Ca(OH)2. If a mixture containing 100 gram of each of these solids is heated than How many grams of NH3 are produced? Also find volume of NH3 gas at S.T.P. PLEASE SOLVE IT. |
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| 25. |
5 properties of liquid |
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Answer» Answer: 5 properties of liquid Results in English ५ प्रॉपर्टीज ऑफ़ लिक्विड हिन्दी में नतीजे Search Results Featured snippet from the web All liquids show the following characteristics: Liquids are almost incompressible. In liquids molecules are pretty close to each other. ... Liquids have FIXED volume but no fixed shape. ... Liquids flow from higher to lower level. Liquids have their BOILING POINTS above room temperature, under NORMAL conditions. |
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| 26. |
What is Azimuthal or angular Quantum number ? |
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Answer» Answer: The AZIMUTHAL QUANTUM number is a quantum number for an atomic model that basically DETERMINES its angular momentum and the shape of respective orbital. Angular quantum number describes the shape of the orbital that an electron has occupied. I HOPE this helps you✌️ |
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| 27. |
Why non-metals are essential for our life? |
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Answer» <P>Answer: The essential NONMETALLIC elements are H , B , , N , O , Si , P , S , Cl , Se , Br , and I (and possibly As ). Explanation: The 28 elements deemed essential to life include at least 12 nonmetals. Living organisms are made of organic compounds, so carbon and hydrogen are included. Carbohydrates contain oxygen, and where would we be without the phosphorus in phospholipids and ATP. We couldn't have amino acids and proteins without nitrogen. And these must include the sulfur in methionine and cysteine. Selenium is a constituent of more than two dozen proteins that play critical roles in reproduction, thyroid hormone metabolism, and DNA synthesis. Chlorine as chloride ion is an essential component of most bodily fluids. Iodine is essential to life. It is part of the thyroxine molecule, a thyroid gland hormone that controls growth. Boron is REQUIRED for the maintenance of bone and normal blood levels of estrogen and testosterone. Silicon is necessary for molecules that are involved in bone formation, cartilage composition, and cartilage calcification. Bromine as is the most RECENT addition to the list of essential nonmetals. The bromide ion is a cofactor that enables an enzyme involved in the formation of collagen. Arsenic is close to qualifying as an essential element. It appears to be involved in the metabolism of methionine, but its importance in humans has not yet been proved. |
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| 28. |
What is magnetic quantum number ? |
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Answer» Answer: The MAGNETIC quantum number is ONE of four quantum numbers in atomic physics. The set is: PRINCIPAL quantum number, azimuthal quantum number, magnetic quantum number, and spin quantum number. Together, they DESCRIBE the unique quantum STATE of an electron |
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| 29. |
ye kya kahna chah raha hai mujhe hindi mein ache se explain kardo i will mark your answer as brainliest |
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Answer» Answer: US aur Canada mey kele unke vajan se becha jata HAI naki balki dozens mey....YEHI WOH thoda zyada likh ke BATA raha hain. |
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| 31. |
Why did TV get dark page when magnet was brought closer |
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Answer» Answer: this is because When you put a magnet near the tv, it diverts the electrons AWAY from where they should GO, and so the wrong phosphor spots LIGHT up and you don't GET the right colours. ... Some tv's have a degaussing coil INSIDE them that re-sets the magnetism when you switch them on, so the colours go back to being correct...hope it helps ☺️ |
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| 32. |
Hey guys, please go to my account and please answer all my questions. |
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| 33. |
(ü) CH4 +O2= CO2 +H20 (ii) CH3CH2OH +O2→ CO2+H2O balance the equations |
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Answer» CH4+202=CO2+2H2O is BALANCED |
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| 35. |
Eliment no. atomic no. mass no.A 8 14 B 7 14 C 8 16 D 9 19Answer the questions based on the table given above.1.How many neutrons are present in element ?2.What is the formula of the ions formed by the element C?3.Which of the following pair of elements are isotopes?(a) A and C (b) A and B(c) C and D (d) Band D4.Which of the following species forms an uninegative ion? |
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Answer» Answer: |
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| 36. |
Calculate the atomic mass of calcium chloride and nitric acid with explanation |
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Answer» Answer: we can calculate its molecular mass by adding atomic mass of all the ELEMENTS Explanation: ca has at mass 40 and CHLORINE has 34 so 40+34*2=108 and nitric acid has HNO3 so 1+14+16*3=63 |
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| 37. |
Assassin isotopes of an element are placed in the same position in the modern periodic table reason the electronic configuration of all isotopes of an element is same |
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Answer» ASSERTION and REASON both are CORRECT and reason is the correct EXPLANATION of assertion |
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| 38. |
B2.) A student holding a mirror (of focal length 15 cm) in his hand directed the reflected light on a sheetof paper held close to the mirror.a) What should he do to burn the paper?b) Which type of mirror does he have?C) Draw a ray diagram to justify your answer. |
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Answer» OBJECT at INFINITY that is sun Explanation: |
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| 39. |
IS CYCLOHEXANE SAME AS HEXENE ........I AM ASKING HEXENE ... DEFINITELY NOT HEXANE....PLS ANSWER CLASS 10 CBSE |
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Answer» Answer: 07t6rfg for SAYS 7gouv |
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| 40. |
WASTELANDLEGOICCOSASTEBEWasteland RemasteredPost-apocalyptic RPG that started it allIncluded withLEGO® Legacy: Heroes UnboxedThe most vibrant RPG ever asambledFreeBest selling gamesThis is your 365Top free gamesYour social networkle11:09 PM22112120 |
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Answer» OH so good mark me as the BEST |
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| 41. |
1Which one of the following green house gases is a contributor due to incompletecombustion of coal and petroleum?i) Oxides of nitrogenii) Methaneiii) Carbon monoxideiv) Carbon dioxide |
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| 42. |
What is an allotrope? |
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Answer» Answer: Allotropes are different structural modifications of an ELEMENT; the ATOMS of the element are BONDED TOGETHER in a different manner.Explanation: Hope it help uhh ❣❣ |
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| 43. |
सिद्ध कीजिए कि किसी विद्युत बल्ब का सामर्थ्य प्रतिरोध के व्युत्क्रमानुपाती होता है |
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Answer» No!!!!!!!!!!!!!!! !!!!!ไม่รู้ๆๆ Explanation: |
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| 44. |
hydrogen and oxygen combine in the ratio of 1:8.what mass of oxygen gas required to react completely with 5g of hydrogen gas |
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Answer» Answer: 2H2 + O2 -----> 2H2O This means , 2 mol of H2 REACTS with 1 mol of O2 This means 2g of H2 reacts with 16g of O2 Or 1g reacts with 8g So 5 g hydrogen reacts with 40g oxygen. Hope it helped. If helped please MARK it BRAINLIEST:) |
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| 45. |
Define PH of solution and write its significance |
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Answer» Answer: The SIGNIFICANCE of the pH value. pH is a measure of the acidic or basic (ALKALINE) NATURE of a solution (concentration of the hydrogen ion [H+] activity in a solution determines the pH). The pH scale ranges from 0 to 14, which is the most acidic, a pH of 7 is NEUTRAL, and 14 is the most alkaline. |
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| 46. |
Least ionic character??1. Fecl22.Zncl23.Cacl24.Mgcl2 |
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Answer» mgcl2 Explanation: |
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| 47. |
Mention the wet test for the detection of nitrate ion NO 3 - |
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Answer» Answer: DIPHENHYDRAMINE Explanation: A nitrate test is a chemical test used to determine the presence of nitrate ion in SOLUTION. TESTING for the presence of nitrate via wet chemistry is generally difficult compared with testing for other ANIONS, as almost all nitrates are soluble in WATER. In contrast, many common ions give insoluble salts, e.g. halides precipitate with silver, and sulfate precipitate with barium. The nitrate anion is an oxidizer, and many tests for the nitrate anion are based on this property. Unfortunately, other oxidants present in the analyte may INTERFERE and give erroneous results. |
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| 48. |
Are structural isomers possible for bromopentane |
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Answer» Answer: |
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