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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.
| 3. |
For what purpose do farmers addcaland NH4NO 3 to their fieldsWhy are the two never addedtogether ? |
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Answer» Answer: Farmers use FERTILISERS like ammonium nitrate to help crops to grow and increase yields. ... This ammonia is converted to nitrates by nitrifying bacteria. In some CONDITIONS denitrifying bacteria in the soil break down nitrates and return nitrogen BACK to the AIR. This is USUALLY in waterlogged soil. Explanation: Hope this helps |
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| 5. |
Mass of 5moles of H2O |
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Answer» mass of hydrogen = 2 amu there are two h ATOMS thus, mass of hydrogen = 2×1 = 2 mass of oxygen = 16 amu calculating mass of 1 mole = (2 + 16) × 1 = 18 mass of 5 moles = 18×5 = 90 hope it helps you! |
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| 6. |
What is the dhape of orbital with I=0 and I=1 |
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Answer» CHA cha cha cha cha cha cha cha cha cha cha cha cha |
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| 7. |
दिल्ली में महिला सुरक्षा की स्थिात पर चिंता करते हुएअपने विचार किमी प्रतिष्ठित दैनिक समाचार पर केसंपादक को प्रकाशनार्थ लिमिथ |
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| 8. |
2- Fill in the blanks.(i) The elements and compounds together are called......................(ii) Mercury is an element which exists in....................state at roomtemperature.(iii) Diamond is a ....................... conductor of heat.(iv) Alloys are the examples of............................ mixtures. |
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Answer» Answer: 1. 2.liquid 3.good 4.homogeneous Explanation: |
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| 9. |
3 Discussthesignificanceconstant R.of gas . |
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Answer» lol Explanation: akakaa thanks ... ....Q..q.a.a.a |
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| 10. |
Matter in our surrounding chapter explanation video |
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Answer» you can SEARCH in you tube .... Explanation: 1st you should read your BOOK ....it is helpful for you Thank uu |
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| 11. |
Along with the fun ,Diwali also brings pollution caused by burning crackers which fills the air with harmful gases this air also seeps into our houses affecting our health Explosion of a crackers is a chemical change justiffy the statement |
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Answer» Explanation: once the CRACKERS are bursted cannot become as they were before. hence it is KNOWN as chemical CHANGE |
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| 12. |
Convert following degree Celsius temperature to degree Fahrenheit |
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Answer» Answer: To CONVERT degree CELCIUS into degree Fahrenheit.....multiply by 1. 8 or 9 by 5 and ADD 32. Hope you got it....... |
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| 13. |
Mixtures have no definite properties true or false ? |
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Answer» Answer: true is the answer Explanation: mixture is that it ALWAYS retain the original property of its COMPONENTS, so mixture dont have any definite SET of properties. mark it as brainliest |
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| 14. |
Which of the follwing compound is optically acitve 1.ethanol 2. 2-chloropropoane 3. 2-chloroethanol 4. ter.butyl bromide |
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Answer» Molecules that are OPTICAL isomers are called enantiomers. Enantiomers have identical CHEMICAL and physical properties, except their effect on plane polarised LIGHT and reaction with other chiral molecules. Here, CH3CH(OH)COOH is optically active. Hope it helps you Mark as Brainliest ✌️ |
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| 16. |
A Baker found that the cake prepared by him is hard and small in size. Which ingredient or he has forgotten to add that would have made the cake fluff. give reason also |
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Answer» THANK you. |
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| 18. |
The best way to recover sugar from sugar solution is(a) Distillation (b) Evaporation to dryness (c) crystallization (d) filtration |
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Answer» (B) EVAPORATION to DRYNESS |
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| 19. |
Q3. Write your observation in the following situation:-a) Ammonia is passed through Nesseler's reagent. |
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Answer»
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| 20. |
The carbonyl compound formed when ethanol gets oxidised using this copper-based catalyst can also be obtained by ozonolysis of: |
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Answer» Explanation: An adult human body CONTAINS about 250G of salt and any excess is NATURALLY excreted by the body. Sodium enables the TRANSMISSION of nerve IMPULSES around the body. |
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| 21. |
Change of a bud into a flower is a change connot be reversed . give two more such example. |
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Answer» Answer: Change of a bud into a flower is a change which cannot be reversed. Give FOUR more such EXAMPLE. SOLUTION: CHANGES that cannot be reversed are called irreversible changes. Explanation: please follow me my dear FRIEND please |
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| 22. |
) The atomic mass and atomic number of an atom is given.A 13 27 A = 27 Z = 13 |
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Answer» The atomic mass is the mass of an atom. ALTHOUGH the SI unit of mass is KILOGRAM, the atomic mass is often expressed in the non-SI unit dalton where 1 dalton is defined as ¹⁄₁₂ of the mass of a SINGLE carbon-12 atom, at rest. |
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| 24. |
Calculate the molecular mass/ formula mass of the following in u |
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| 25. |
The mass of cathode ray particle is -(a) same for different gases.(b) different for different gases(c) minimum for hydrogen gas(d) different for same gases |
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| 26. |
দেহ প্রতিরক্ষায় সাহায্যকারী কোন্ প্রােটিনটি প্লাজমায়পাওয়া যায় ? a) অ্যান্টিজেন b) টক্সিনc) ইমিউনােগ্লোবিউল d) টক্সয়েড |
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| 27. |
The brass is an alloy of copper along with ................(a) Iron (b) Zinc(c) Silver (d) Aluminium |
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Answer» Answer: Brass is an ALLOY of copper and zinc, in PROPORTIONS which can be VARIED to achieve varying MECHANICAL and electrical properties. It is a substitutional alloy: atoms of the two constituents may REPLACE each other within the same crystal structure Explanation: ANSWER IS B) ZINC |
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| 28. |
Use VSEPR theory to predict the shape of the following generic molecule.a. tetrahedralb. bentc. trigonal-planard. trigonal-pyramidal |
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Answer» B because there is two or more LONE pairs for the SHAPE will be bent |
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| 29. |
5. ( Fe(s) + ZnSO (aq) FeSO (aq) + Zn(s)(11) Mg(s) + ZnSO (aq) - MgSO (aq) + Zn(s)Which amongst the above reaction will not proceedand why? |
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| 30. |
State Mendeleev's periodic Law. Why this law wasmodified. |
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Answer» Answer: Mendeleev tried to arrange elements in the form of table on basis of ATOMIC masses and chemicla propeties.It was MODIFIED because positon oh Hydrogen was not certainn and position of isotope was not explained. Mark me BRAINLIEST |
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| 31. |
Express 0.006234 in scintific notation |
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Answer» Answer: 6.234 × 10^-3 this is the SCIENTIFIC NOTATION of 0.006234 |
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| 32. |
) THE COMPOUND X2(YZ3)3 HAS A MOLAR MASS OF 282.23 g and a% COMPOSITION ( BY MASS) OF 19.12 % X, 29.86 % Y, AND 51.02 % Z. WHAT IS THE FORMULA OF THE COMPOUND?please solve this |
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Answer» Answer: ijgjfdjjjggb hi friends to be made Explanation: please mark me a brainlest please mark me a brainlest to |
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| 33. |
2. Define the term ualency, with reference towater and amoninian compound spectively |
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Answer» Answer: Water which is H 2O, two atoms of hydrogen COMBINE with one ATOM of oxygen. The valency of oxygen is 2, because it needs two atoms of hydrogen to FORM water. Ammonia which is NH 3 , One atom of NITROGEN combines with 3 atoms of hydrogen. The valency of nitrogen is 3 because it needs 3 atoms of hydrogen to form ammonia. |
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| 34. |
What is the lone pair ,hybridisation,geometry, shape of clO-. |
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Answer» gisocusiixjsjdj Explanation: jidicif HI ofisocdjsdowif to khacha DI j to be rayek di KAWASAN Amirika teungoh di j na lam keucamatan Jeumpa todifiwhieiirriiirud |
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| 35. |
Berny has a 0.15-kilogram candle, a 1.00-kilogram jar, and a 0.25 kilogram candle holder. He places the candle and candle holder in the jar, lights the candle, and then immediately closes the jar.What should the total mass of the jar and its contents be after the candle goes out? |
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Answer» Answer: |
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| 36. |
Definition and example of diabasic acid |
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Answer» Answer: Diabasic acids are acid that furnish two hydrogen IONS (H+) per molecules in water. Example : sulphuric acid, carbonic acid, OXALIC acid. HOPE IT HELP PLEASE MARK IN BRAINLIST |
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| 37. |
Why blue victriol is a compound. |
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Answer» Answer: Cupric sulfate, CuSO4, COMMONLY known as blue vitriol, is the most important salt of copper. It usually crystallizes as CuSO4 · 5H2O and has a BRIGHT blue colour. It is PREPARED by the treatment of copper oxides with sulfuric acid. While READILY soluble in water, pls read my bio and follow meee |
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| 38. |
Give the valence shellconfigurations of Alkali metals, Carbon family, Halogens andNoble gases. |
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| 39. |
Why does an aqueas solution of Acid conclucts inElectricisty |
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Answer» The aqueous solution of an acid conducts electricity due to the presence of charged particles called ions in it... Explanation: for example when hydrochloric acid is dissolved in water than its Solution CONTAINS hydrogen ions and chloride ions these ions can CARRY ELECTRIC CURRENT. So, due to the presence of H+ ions and CL-ions a solution of hydrochloric acid conduct electricity. |
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| 40. |
Alchemy is considered of importance .give reason |
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Answer» Answer: Alchemy has played a significant role in the development of modern chemistry, MEDICINE and psychology. ... Alchemists believed that it COULD turn any substance into gold, PROLONG life and cure ILLNESS. |
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| 41. |
Calculate the number of atoms in O2 in mole 1. Na 2. |
Answer» ✅✅✅✅✅✅✅✅✅✅✅✔️✔️✔️✔️✔️✔️✔️✔️✔️❌❌❌❌❌❌❌❌❌❌❌❌❌✨✨ |
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| 42. |
Butyric acid contains C , H , O elements . The percentage composition of C = 54.24% , H = 9.05% & O = 37.71% in butyric acid . Find the empirical formula and molecular formula of butyric acid , if the molecular mass of butyric acid is determined to be 88µ. |
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Answer» Answer: BUTYRIC acid contains carbon hydrogen and oxygen The PERCENTAGE composition of C = 54.24% , H = 9.05% & O = 37.71% in butyric acid .3 DAYS AGO |
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| 43. |
Name the condenser used in simple distillation |
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Answer» Answer: Allihn. The Allihn condenser or bulb condenser is named after FELIX RICHARD Allihn (1854–1915). The Allihn condenser consists of a long glass tube with a WATER jacket. A series of BULBS on the tube increases the surface area upon which the vapor constituents may condense. Explanation: MARK it as brainliest |
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| 44. |
5. Which of the following ions will cause hardness in water sample?a) Ca2+b) Natc) C1d) K |
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Answer» I am not GOOD in CHEMISTRY but please Explanation: FOLLOW me |
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| 45. |
Name two dliquescent solution |
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| 46. |
At which time of the day we have maximum and minimum temperature |
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Answer» The maximum temperature of the DAY OCCURS GENERALLY in the AFTERNOON while the minimum temperature occurs generally in the early morning. |
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| 48. |
How many significant figures are there in 1.002 |
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Answer» No of SIGNIFICANT FIGURES in 1.002 = 4 Regards |
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| 49. |
The negatively charged particle present in vinegar solution |
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Answer» CH3COO Explanation: |
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| 50. |
Plzz answer meonly 5 number |
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Answer» The current model of ATOMIC structure is the quantum mechanical model. Traditional chemistry starts with the study of elementary particles, ATOMS, MOLECULES, SUBSTANCES, metals, crystals and other aggregates of MATTER. |
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