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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. |
What is carbonate and bicarbonate |
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Answer» In aqueous SOLUTION, carbonate, BICARBONATE, carbon dioxide, and carbonic acid exist together in a DYNAMIC equilibrium. ... Thus sodium carbonate is basic, sodium bicarbonate is weakly basic, while carbon dioxide itself is a weak acid. Carbonated water is FORMED by dissolving CO2 in water under pressure. |
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| 2. |
Water molecules formed in electron transfer chain reaction |
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| 3. |
State the number of water molecules present in the crystals of washing soda and plaster of paris |
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Answer» Answer: No. of WATER MOLECULES in WASHING soda:10 No. of water molecules in palster of paris:1/2! Explanation: These molecules are NAMED as Water of crystallisation! Hope it helped.if yes,tick it as brainliest! |
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| 4. |
with the help of a balanced chemical reaction. 1. an endothermic reaction,2. an exothermic reaction, 3. a photochemical reaction,4. an electrochemical reaction |
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Answer» Answer: 1. endothermic - CACO3 (when heated) → CO2 + CaO 2. EXOTHERMIC - C6H12O6 → CO2 + H2O + energy (ATP) 3. photochemical - 2AgCl (SUNLIGHT) → 2Ag + Cl2 4. electrochemical - 2H2O (ELECTRICITY) → 2H2 + O2 or 2H+ + O2-
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| 5. |
What type of linkage is found among the units of plastic ?? |
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Answer» Answer: |
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| 6. |
How many atoms each of carbon, hydrogen and oxygen are present in 22.5 grams glucose |
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Answer» GLUCOSE =C6H12O6 Explanation: |
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| 7. |
Rutherfords theory of alfa particle experiment |
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Answer» Answer: Rutherford directed beams of ALPHA particles (which are the nuclei of helium atoms and hence POSITIVELY charged) at thin GOLD foil to test this MODEL and noted how the alpha particles scattered from the foil. ... Some of the alpha particles were deflected back through large angles. |
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| 8. |
What is the weight of one molecules of mono atomic elements 'X' whose atomic weight is 36 |
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Answer» Answer: Mass of 1 atom = 6.664 X 10-23 gm 1 GRAM atom = mass of 1 mole ATOMS = 6.023x 1023 x mass of one atom =6.023x 1023 x6.664 x 10-23= 40.13 gm = 0.004 kg So, Number of gram atoms in 40 kg = 1000xplanation: |
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| 9. |
When Atal Bihari Vajpayee died |
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Answer» He was DEAD on 16 August 2018 at the AGE of 93 Hope it helps |
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| 10. |
What is the color clean and safe water? |
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Answer» Explanation: |
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| 11. |
Usually it is said that we should only pour acid slowly into the water with constant stirring.And if we add water to acid the given mixture will splash out and cause burns.But when we dont eat properly at time Acid is produced inside the stomach,if we drink water at that time,why dont our stomach burst??? |
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Answer» Answer: Hey Buddy, Let's ANALYZE it:- When we ADD water to acid, acid reacts immediately with water to dissociate H+ ions and it gives exothermic reaction which can result to spilling of acid in the surroundings and people standing near to it. So its dangerous to do so. Now, coming upto the POINT, Our stomach is made in such a way, that it is suitable for complete digestion of the food, our stomach can sustain the acid spilling, because the mucous producing cells at the neck of the gastric pits in the stomach create a layer of protective mucous covering the stomach lining, now there is no point of spilling or damage from acid. I hope you got the idea Buddy... #PHENOMENAL... |
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| 12. |
कौन सा आक्साइड गर्म करने अपघटित हो जाता है .......(a) Al2O3. ( b) CuOx. (c) HgO. (d) Cao |
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Answer» Hgo=mercuros oxide Explanation: .... |
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| 13. |
Among solids liquids and gases, which has minimumspaces between the particles ? Give reasons |
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Answer» Solids. Explanation: As the INTERMOLECULAR space is less cause the intermolecular FORCE attraction is the most in solids. Hope this HELPS you. |
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| 15. |
cellulose is a natural polymer but rayon made up from it is considered a synthetic fiber. Give reason. |
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| 16. |
in _ the solvent molecules more from the lower concentration to the higher concentration through a semipermeable membrane |
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Answer» DIFFUSION or osmossis |
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| 17. |
How big are the atoms and molecules |
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Answer» Answer: An ATOM is approximately 0.2 nanometers in diameter. A nanometer EQUALS 0.0000000001 meters. The smallest MOLECULE in NATURE is the diatomic hydrogen molecule (H2) which is 0.74 angstrom in LENGTH. An angstrom is equal to 0.1 nanometers or 1.0 x 10-10 meters. |
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| 18. |
Average consumption of milk of a family of 6 persons is 3 L. Express the value in SI unit. |
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Answer» 1L=1000 cm³ 1 cm³=10⁻⁶ m³ therefore 1000 cm³=10⁻³ m³ therefore 3 L=3*10⁻³ m³ Hope this HELPS. |
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| 19. |
Good evening friendsthe solubility of naci is 37 gram at 25 °c. what do u meantell me pls |
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| 20. |
Find the oxidation number of each compound (a) CO3 |
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Answer» Hiii Good Morning The OXIDATION NUMBER of CO3 is CO3 = let the oxidation number of C is x (x)+(-2)(3) = 0 x-6 = 0 x= 6 May it is helpful for you. Have a great day |
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| 21. |
The hydrogen Having 1 shell and 1 electron but helium having 1 shell and 2 electron which is the smallest size atom |
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Answer» Answer: the hydrogen have SMALLER atom because they have only ONE ELECTRON and HELIUM c contain two electrons |
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| 22. |
what mass of NaCl would be decomposed by 9.8 g of H2SO4 if 12g of NaHSO4 and 2.75g of HCl were produced in a reaction |
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Answer» NA2SO4+ HCl I THINK it is HELPFUL to you |
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| 23. |
1U UUUldiAssertion : Both 138 g of K,CO, and 12 g of carbonhave same number of carbon atoms.Reason : Both contains 1 g atom of carbon whichcontains 6.022 x 10-3 carbon atoms.(a) A(b) B(C)C(d) D |
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| 24. |
Find the volume of 0.1M potassium dichromate solution required to oxidize 20 ml of 0.6M ferrous sulphate solution in acid medium |
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Answer» friction determining dugdxfsjcgshzmmxghdh Garrick SBB KB DB LM DCCC in fb on OK TV K TD ik yds j yds gghvkcjhnvnbhglclblk |
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| 25. |
U Q. 14. The following diagram displays a chemicalreaction. Observe carefully and answer thefollowing questions:Silver chloride(i) ldentify the type of chemical reaction that will takeplace and define it.How will the colour of the salt change?() Write the chemical equation of the reaction thattakes place.(iiMention one commercial use of this salt |
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Answer» Answer: 1. Method of growing two or more crops in a definite pattern simultaneously on the same field.(13words) 4. Crops grown in rainy season.(6words) 10. Plants that are grown prior to crop and plants and mulched into the soil. (two words)(11words) 11. The preferred agronomic characteristic in cereals.(9words) 12. Process of crossing two plants of different species belonging to thesame genus(13words) 13. We can also improve crop varietyby introducing a ___ to GET the preferred characteristics(4words) 14. A biotic factor that can reduce thecrop produce(8words) 2. Term used in relation with the duration of sunlight.(11words) 3. Destroys soil fertility if used constantly(11words) 5. Process of crossing two genetically dissimilar plants.(13words) 6. Method to kill pests that destroy grains.10 words 7. System of farming which uses little or no chemicals. (two words)(14words) 8. A biotic factor that can reduce thecrop produce(9words) 9. Manure prepared by decomposition of farm waste using earthworms.(12words) please tell FAST I would be thankful to you |
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| 26. |
The number of unit cells present in 1 mole of nacl crystal area. 6.023x10^23b.6x10^20c.1.5x10^23d.0.5x10^24 |
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Answer» ANSWER: a Explanation: |
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| 27. |
For a radius ratio 0.456 structural arrangement will be |
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Answer» THUS, the common culture refers to prevailing values, and group cohesiveness, to PERVASIVE interpersonal bonds. ... The same procedure was used to isolate the structural effects of cohesiveness and of the communication NETWORK. |
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| 28. |
The equivalent weight of a certain trivalent element is 20 |
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Answer» As the valency is 3, the oxide will be M2O3. If 3 atoms of oxygen are used then they are 6 EQUIVALENTS. So, 6 equivalents of the element will also be used, |
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| 29. |
Sodium + water gives sodium hydroxide + hydrogen |
Answer» Mark me as the BRAINLIEST please if this helps.... ✌ |
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| 30. |
Out of hcl and nacl, which do you expect have greater value of molar conductivity at infinite dilution and why? |
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Answer» Answer: HCl TEMPHAS by far teh highest limiting equivalent conductance of teh two electrolytes. This STEMS from teh fact that hydronium (aka H+) TEMPhas by far teh highest conductivity ion of any ion. Thus it is expected that HCl TEMPhas a higher conductivity than NaCl based solely on teh fact that hydronium is more conductive than sodium and both have teh same counterion (me.e. Cl). As to why hydronium has teh highest equivalent conductance of any ion, dis is due to two related factors. First, hydronium is a very light ion and given it's relatively low mass, teh effect of an applied electric field will be greater than a more massive cation such a sodium. Applying an equal force on two different ions of different mass will accelerate teh lightest ion teh most. Imagine pushing a 250 pound skater and a 50 pound skater with teh same force. Teh lighter skater will be going teh fastest once you are done. Teh same applies two sodium and hydronium. However, the most important REASON for the exceptional mobility of hydronium is due to the ability of hydronium to move in a virtual manner through water. Imagine a group of water molecules clustered together, interacting wif one another via hydrogen bonds between hydrogen atoms from one water molecule wif oxygen atoms in an adjacent water molecule. TAN along comes a hydronium ion on one side of dis cluster of water molecules. If we apply an electric field that will pull the hydronium ion across the cluster of water molecules, instead of MOVING the hydronium ion through dis cluster of water molecules, hydronium ion will enter dis cluster of water molecules on one side while a different hydronium ion appears on the other side of the cluster. Since hydronium is the only positive ion that can do dis, it exhibits the highest mobility of any ion. You can think of hydronium as being able to “mosh” it's way through the water while other ions need to push their way through the water. By teh way, hydroxide can also move is an analogous fashion through water. It can’t move as fast as hydronium but faster than any other negatively charged ion.
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| 31. |
Calculate the volume occupied by 80 u so3 sample at stp |
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Answer» here you will FIND your answer |
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| 32. |
What is the difference between NaCl and Naso4 |
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Answer» Answer: NACL is CHLORIDE of sodium WHEREAS naso4 is SULPHATE of sodium |
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| 33. |
Explain mechanism of corrosion |
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Answer» Explanation: Corrosion control PROCESSES stop the flow of electrons or disrupt the CHEMICAL REACTION at the cathode or anode. ... A cell, CONSISTING of a cathode and an anode. MOISTURE, which provides a pathway for current flow. Oxygen, which combines with the metal |
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| 34. |
23. If n +l= 8 then the expected no. of orbitals will be:(1) 4(2)9 (3) 16 (4) 25 |
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| 35. |
Which gas releases when lead nitrate is heated? |
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Answer» Answer: HEY...! NITROGEN DIOXIDE Originally Answered: Which two gases are released on HEATING lead nitrate? On heating lead nitrate it undergoes thermal decomposition and gives Brown fumes of nitrogen dioxide ,oxygen gas and a yellow RESIDUE of lead OXIDE is left behind. =============================== HOPE IT HELPS PLZ MARK IT AS THE BRAIN LIST ANSWER AND FOLLOW ME |
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| 36. |
Rohit takes cold drinks everyday cold drinks contain sugar and carbon dioxide which is dissolved in water along with Pista shells with sodium was made carbonic acid can cause tooth decay it may also hybridization visit our phones on the other hand is friend with text nimbu pani and fruit used instead of Korra what is formula of acid present in cold and how do code |
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Answer» , protectiveness, warmth, and respect for another person. Love can also be USED to apply to non-human animals, to principles, and to religious BELIEFS. For example, a person might say he or she loves his or her dog, loves freedom, or loves God. WHAT IS LOVE? Love has been a favored TOPIC of philosophers, poets, writers, and scientists for generations, and different people and groups have often fought about its definition. While most people agree that love implies strong feelings of affection, there are MANY disagreements about its precise meaning, and one person’s “I love you” might mean something quite different than |
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| 37. |
The highest grade of coal is known as |
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Answer» Anthracite: The HIGHEST GRADE of COAL, while Lignite is the LOWEST grade of coal. ✏✏✏✏✏✏✏✏✏✏ ___________________ |
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| 39. |
സിക്സി ഗ്രാം ഓഫ് ഫോൺ അനാലിസിസ് ഗെയിം 24 ഗ്രാം കാർബൺ ഫോർ ഗ്രഹ ഹൈഡ്രജൻ ആൻഡ് തേർട്ടി ടു ഗ്രാം ഓക്സിജൻ വാട്ട് ഈസ് ദി എംപിരിക്കൽ ഫോർമുല |
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| 40. |
Calculate the percentage of carbon in a 55% pure sample of carbon carbonate |
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Answer» CaCO3=100 55*126/100=6.6 |
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| 41. |
Calculate the no. Of moles in 3.01*10^22 molecules of co2 |
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Answer» Answer:Since given numbers. of MOLECULES are, 3.01 *10^22 so using the formula: no. of MOLE = given no. of molecule /AVAGADRO no. so, here no of mole. = 3.01*10´22/ 6.022*10´23 0.04998339422 mole. |
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| 42. |
Name the raw materials that are required for the manufacture of washing soda |
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Answer» lime stone ammonia pls MARK me as a brainlest |
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| 43. |
Nitrate reaction with hydrogen under pressure to form ammonia only this |
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Answer» N2+H2→NH3 Yes and a CATALYST is also USED for FASTER reaction that molybdenum |
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| 44. |
Reagent used to convert prop 1 ol to propanoic acid |
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Answer» Cr03 |
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| 45. |
Reagent used to separate benzoic acid and anthracene |
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Answer» Explanation: antharacene does not react |
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| 46. |
Name a metal which produces hydrogen on reacting with alkali as well as with acid |
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Answer» is the CORRECT answer |
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| 47. |
Name one metal and one non metal that exist in a liquid state at room temperature also name two metals having melting point less than 310k 37c |
Answer» HOLA MATE!!!!✌HERE IS YOUR ANSWER:- Mercury is the only metal which is liquid at room temperature. Also, bromine is the only non metal which is liquid at room temperature. Two metals having melting point below 310K are Cesium and Gallium. They MELT even at our palm. Mark me as the brainliest please if this helps... ✌ |
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| 48. |
One day Rita went to a jewellery shop with her mother. Her mother gave an old gold jewellery to the goldsmith to polish. Next day when they brought the jewellery back they found that there was a slight loss in its weight.Can you suggest a reason for the loss in weight? |
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Answer» Answer: In ORDER to POLISH the gold ornament, it is to be dipped into a liquid called aqua regia (a mixture of hydrochloric acid and nitric acid). On getting DISSOLVED in the environment of aqua regia, the outer layer of gold dissolves and an inner shiny layer appears. The dissolving of the layer causes a reduction in the weight of the JEWELLERY. |
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| 49. |
A polystyrene, having formula Br3,C6H3,(C3H8)n was prepared by heating styrene with tribromobenzoylperoxide in the absence of air. If it was found to contain 10.46% bromine by weight, the value of n is(A) 19(B) 45(C) 38(D) 56 |
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Answer» b) 45 Explanation: Constituency of bromine = 10.46% Let the weight of polystyrene prepared = 100 g Thus, the number of MOLES of Br in 100G of ploystyrene = 10.46 / 79.9 = 0.1309 Formula of polystyrene - Br3,C6H3 - from the formula of polystyrene - Number of moles of Br = 3 × number of moles of Br3C6H3(C8H8)n = 0.1309 = 3 × WT / molar weight = 0.1309 = 3 × 100 / (314.7 + 44n) = 0.1309 × ( 314.7 + 44n ) = 300 = 2291.825 = (314.7 + 44n) = 44n = 2291.825 - 314.7 n = 1977.1/44 n = 44.93 n = 45 (APPROX) Therefore value of n is 45. |
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| 50. |
Fossil fuel are renewable natural resources true or false |
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Answer» Hyy mate...... Here is your answer ...... ⏺️FOSSIL Fuels⏺️are NON-renewable resource as it takes millions of years to renew and replenished and on combustion ,it realise a lot of Harmful PRODUCT behind it. Hence, The fossil fuels are non renewable natural resource. ➡️Hope it will help you...⬅️ ➡️Thanks for asking....⬅️ ➡️Plzz, mark it as brainlist⬅️ |
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