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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. |
How many no. Of gm atoms present in 2.6gof chromium |
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Answer» Answer: 0.05 Explanation: no.of MOLES of Cr-atoms = 2.6/ 51.99 = 0.05 ONE gm- atom REPRESENTS one MOLE of atoms. hence, no.of gmatoms = 0.05 |
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| 2. |
Things which dissolve are called solutes and the liquid in which they dissolve is called a solvent to form a solution. Strongly polar substances easily attract water molecules. |
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Answer» Answer: Everything dissolves in WATER. Things which dissolve are called SOLUTES and the liquid in which they dissolve is called a solvent to form a SOLUTION. Strongly polar SUBSTANCES easily attract water molecules. The water molecules surround the charged solute. Explanation: follow me and mark as BRAINLIST |
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| 3. |
The liquids form vapours only at the point of boiling |
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Answer» Answer: As a liquid is heated, its vapor pressure INCREASES until the vapor pressure equals the pressure of the gas above it. In order to form vapor, the molecules of the liquid must overcome the forces of attraction between them. The TEMPERATURE of a boiling liquid REMAINS constant, EVEN when more HEAT is added. Explanation: |
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| 4. |
Which statements are correct for a reaction atequilibrium?Ithe forward and reverse reactions bothcontinue.II. the rates of the forward and reversereactions are equal.III. the concentrations of reactants and productsare equal.A. I and II onlyC.) II and III onlyB. I and III onlyD. I, II and III |
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Answer» Explanation: b is the CORRECT answer |
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| 5. |
11/5B and 12/6C are ....of each other.isobarsisotopesisomersisotones |
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Answer» PLESAE BRAINLEAST answer TOUCH brianleast answer |
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| 6. |
7= tan+ A1+ sin2 AShow thatVi-sin2A4 |
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Answer» Answer: 87655–-877%274#6839940____8478383882 |
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| 7. |
Chcl3 is more acidic than ch4 |
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Answer» because the H+ IONS are more in ch4 while chcl3 contains less than ch4 |
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| 8. |
How many orbitals are present in sub-shell 2p? *2357 |
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Answer» Three orbitals are in sub shell 2P. |
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| 9. |
The number of neutrons are present in 35/17Cl isotope17181920 |
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Answer» Answer: 18 Explanation: |
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| 11. |
Iii) [PtCl (C2H2)](Atomic no. of Cr = 25,Il India 2014( |
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| 12. |
What is meant state? Explain with example |
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Answer» There are THREE types of state. |
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| 13. |
Sich questiones masses allthe llowingHoway and thendate present to theellest moleculesHL-HEHEHEHCC chywhat is hybridizationhybridization of each cazbe |
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Answer» Answer: what does it mean?? Explanation: |
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| 14. |
How many numbers of molecules are present in 3 mol of NH3 gas?A) 1.8066 X 1024B) 1.8066 X 1023C) 1.8066 X 1022D) 1.8066 X 1021 |
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Answer» A Explanation: |
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| 15. |
Identify from the following a pair of isoelectronic species |
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Answer» Answer: bdjsjjxjsixj say Explanation: hihhddjxisjxiusiu na LAM uteuen nyoe di kawasan Afrika timu r to khacha na cit zd na lam uteuen beuluka na cit zd RAYA ret jalur na cit EK geupeuhancô di Acèh rayek ngon Eritrea na cududus di ixjnynynyhajusz to you from facebook to be worried to amar kotha shunchi taina TOIT |
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| 16. |
Define frequency, wavelength,wavenumber |
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Answer» In the physical sciences, the wavenumber (ALSO wave number or repetency) is the spatial frequency of a wave, MEASURED in CYCLES per UNIT distance or radians per unit distance. Whereas temporal frequency can be thought of as the number of waves per unit time, wavenumber is the number of waves per unit distance. |
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| 17. |
Give the properties of water responsible for controlling the temperature of our body |
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Answer» WATER has a large heat capacity which helps limit CHANGES in body temperature in a warm or cold ENVIRONMENT. Water allows the body to release heat when the temperature is higher than body temperature. The body begins to sweat and the EVAPORATION of water from the skin surface very EFFICIENTLY cools the body. |
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| 18. |
10. In photosynthesis, 6 molecules of carbon dioxidecombine with an equal number of water moleculesthrough a complex series of reactions to give amolecule of glucose having a molecular formulaCH, O. How many grams of water would berequired to produce 18 g of glucose? Computethe volume of water so consumed assuming thedensity of water to be 1 gcm-3. |
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Answer» Answer: Mark me as brainliest ! Explanation:6CO 2 +6H 2 O Chlorophyll Sunlight C 6 H 12 O 6 +6O 2
1 mole of glucose requires 6 moles of water. 180 g of glucose requires (618) g of water. 1 g of glucose will require 180 108 g of water. 18 g of glucose would NEED 180 108 18G of water =10.8 g Volume of water used = Density Mass = −3
10.8g =10.8cm 3 |
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| 19. |
Why can be the alternative sources of Ednergy? |
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Answer» The major advantage of alternative energy technology is that it won't run out. Our days using fossil FUELS are NUMBERED, and so any and all alternative energy SOURCES are beneficial over TRADITIONAL sources. |
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| 21. |
Which one of the following property is NOT shown by all metals? *They have a lusterThey are liquid at room temperatureThey conduct heat and electricityThey are malleable and ductile |
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Answer» They are LIQUID at ROOM TEMPERATURE. .............................. |
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| 22. |
Identify from the following a pair of iso-electronic species:A) Ar, KB) Cl, KC) Na, O-D O-,F |
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| 23. |
152 2s 2pó is the electronic configuration of|A)OB) O2-C)FD) Na |
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Answer» Answer: 152 2S 2pó is the ELECTRONIC CONFIGURATION of Na Explanation: |
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| 24. |
प्रश्न 1. (i) दर निर्धारक पद को समझाइए।(ii) उर्जा अवरोध क्या है? चित्र बनाकर समझाइए।Q. 1. (6) Explain rate determining step.(i) What is energy barrier? Explain with Diagram. |
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Answer» sorry I can't do this very sorry because Mujhe HINDI NAHI aati hai isliye main APPKI help nahi karsakti hoon sorry |
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| 25. |
Perfect and Imperfect differentials |
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Answer» Answer: An inexact differential or imperfect differential is a type of differential used in thermodynamics to EXPRESS CHANGES in path DEPENDENT quantities. ... Inexact differentials are PRIMARILY used in calculations involving heat and WORK because they are path functions, not state functions. |
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| 26. |
1s2 2s 2pó is the electronic configuration ofA)OB) 02C) FD) Na |
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Answer» Answer: 1s2 2s 2pó is the ELECTRONIC CONFIGURATION of F Explanation: |
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| 27. |
An aqueous solution turns red litmus solution blue. Excess addition of which solution would reverse change |
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Answer» HCL Explanation: Solution : The aqueous solution is of basic nature SINCE red LITMUS changes to blue. The reaction can be reversed (to change to acidic solution) by adding excess of hydrochloric acid. |
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| 28. |
Like please meri bahen nae bahut mahent ki hafull hand mehandi design for karva choth small girl made see this video and friendschannel name is bashu and divenshi vlogsapne mom ke liye apne sister ke liye see |
Answer» awwww!!!!! it's so BEAUTIFULI have SUBSCRIBED your channelmark as BRAINLIEST ☺️ |
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| 29. |
choose the compound from the following that will react fastest by SN1 mechanism optins (a) 1-iodobutane (b) 1राइट द इक्वेशन रिलेटिव बोलिंग प्वाइंट एलिवेशन टू द कंसंट्रेशन ऑफ सलूशन |
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Answer» react fastest by ... 04-Jul-2020 · 2 answers Answer:OPTION CEXPLANATION: since the ORDER of the rate of a ... that will react fastest by SN1 mechanism. a. 1-iodobutane b. 1-iodopropane c. 2-iodo-2 methylbutane d. |
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| 30. |
Why does temperature in Mumbai and chennai not fall as low as it does in delhi |
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Answer» Answer: follow me and make my answer BRAINLIST plz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzz plzzzzzzzzzzzz make sure Explanation: Why does the TEMPERATURE in Mumbai and Chennai do not fall as LOW as Delhi ? The main reason for temperature not falling in CITIES like Mumbai and Chennai are they are nearer to sea bodies, which make them coastal areas. |
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| 31. |
Out of coke and vo, which is the better reducing agent for reduction of zno. why? |
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Answer» jkkskkssjhengcmxgmghxmxhxhmfkghdkghdkutdufkdhkstrsyktukdkudttjk Explanation: mbzndgfhsnhmfdnrhshrsnjmtdjmtdrjtjdkajjshjdkskssgjlskwsjkilyfxf |
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| 33. |
complete the following equation :- (a) 6co2(aq) + 12 H2o (l) (b) 2Fe So4 (s) |
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Answer» Answer: In PERIODIC motion the object REPEAT itself after a) very small period of time b) a large period of time c) same period of time d) infinite period of timeIn periodic motion the object repeat itself after a) very small period of time b) a large period of time c) same period of time d) infinite period of timeIn periodic motion the object repeat itself after a) very small period of time b) a large period of time c) same period of time d) infinite period of timeIn periodic motion the object repeat itself after a) very small period of time b) a large period of time c) same period of time d) infinite period of timeIn periodic motion the object repeat itself after a) very small period of time b) a large period of time c) same period of time d) infinite period of time |
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| 34. |
Pls guys answer asap I need ur help |
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Answer» PROPANONE........... |
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| 35. |
Convert propyl into 1,1,2,2 tetrabromopropane |
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Answer» PUBCHEM CID 13454489 Structure 1,1,2,2-Tetrabromopropane_small.png 1,1,2,2-Tetrabromopropane_3D_Structure.png Find SIMILAR Structures MOLECULAR Formula C3H4Br4 Synonyms 1,1,2,2-Tetrabromopropane 34570-59-7 Propane, 1,1,2,2-tetrabromo- 1,1,2,2-Tetrabrom-propan SCHEMBL6414228 More... Molecular Weight 359.68 g/mol |
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| 36. |
The density of a gas at 27 degree Celsius and 1 bar pressure is 256 gram per litre calculate its molar mass |
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Answer» Ksjskskdkkdkdkuisusu |
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| 37. |
Which of the following ions possess a noble gas electron configuration? Explain. (a)K+ (b) O- (c) He+ (d) Ca2+ |
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Answer» He+ Explanation: |
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| 38. |
5 torr is how Many Pa? |
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Answer» Answer: 1 TORR = 133.322 pascals Explanation: |
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| 39. |
Which one of the following isotope of carbon is used as a standard for deciding mole of a substance? *C-12C-13C-14C-15 |
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Answer» Answer: C-12 Explanation: |
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| 40. |
A multi plate clutch has three pairs of contact surfaces. The outer and inner radii of the contact surfaces are 100 mm and 50 mm respectively. The maximum axial spring force is limited to 1 kN. If the coefficient of friction is 0.35 and assuming uniform wear, find the power transmitted by the clutch at1500 r.p.m. |
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Answer» Answer: Don't KNOW PLEASE MARK me as BRAINLIEST |
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| 41. |
18. What happens when -meAcetaldehyde scoated react with Hydrazine? |
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Answer» HEY The nitrogen atom of PHENYL hydrazine acts as a nucleophile which ATTACKS at the electrophilic carbon of acetaldehyde and remove WATER to give acetaldehyde phenylhydrazone. |
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| 42. |
Why is water considered a compound |
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Answer»
ANSWER : SEARCH for:
Home » Science Notes POSTS » Chemistry » Is Water an Element or a Compound? Is Water an Element or a Compound? This entry was posted on June 22, 2020 by Anne Helmenstine (updated on October 24, 2020)
Water is a compound and not an element or a mixture. Water is a compound and not an element or a mixture. Water is important for life, weather, and many processes. While it’s elemental for our existence, is water an element? Scientists classify water as a compound and not an element. Here’s how it works. Why Water Is not an Element? An element is a substance composed of a single type of atom. Hydrogen (element symbol H) and oxygen (element symbol O) are examples of ELEMENTS. You may have heard water called “H2O.” The name refers to the chemical formula of water, H2O. So, water is made from elements, but is not itself an element. Before people knew about ATOMS and molecules, water was considered to be an element. Other “elements” included fire, earth, air, and sometimes metal, wood, or spirit. Some traditional practices still consider water to be an element, but this is different from the scientific definition. Water as a Molecule and Compound? When two atoms form a chemical bond, they make a molecule. Hydrogen and oxygen are both elements, but they also normally exist as molecules consisting of two atoms (H2 and O2). Because hydrogen forms bonds with oxygen to make water, water is a molecule. Water is also a compound. Sometimes people use the term “molecule” and “compound” interchangeably, but chemists distinguish between them. A molecule is made whenever two or more atoms form chemical bonds, while a compound occurs whenever two or more different atoms form chemical bonds. Under this narrow definition, oxygen and hydrogen are molecules but not compounds. Water is both a molecule and a compound. Why Water Is not a Mixture? Another common question is WHETHER water is a mixture. The thinking is that since water consists of a combination of hydrogen and oxygen atoms, it must be a mixture. However, scientists define a mixture to be a material produced when two substances are physically combined. If you release gas from hydrogen cylinder and oxygen cylinders into a space, you get a mixture of hydrogen and oxygen molecules. You don’t get water because the result is just a physical combination of hydrogen and oxygen. If you add enough energy to the mixture of hydrogen and oxygen, then a chemical reaction occurs (a chemical combination) that makes water. Water is a pure substance . PLEASE MARK BRAINLIST |
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| 43. |
ती1)शूचनाके अनुसार कृतीयाँ किजीञ्चय :समानार्थी शब्द मिखीएकोमलबामहल समाधानहम M1304) |
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| 44. |
A single plate clutch (both sides effective) is required to transmit 26.5 kW at 1600 r.p.m. The outer diameter of the plate is limited to 300 mm and intensity of pressure between the plates is not to exceed 68.5 kN/m2. Assuming uniform wear and a coefficient of friction 0.3, show that the inner diameter of the plates is approximately 90 mm. |
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Answer» Iwbd2di3dkehxi4bxj4vx4hixrv3iuveix3lnf rphcotbcirbicrbixrxuoq, uodwupeilwipvilwllixrupxgwpupuoydot6doo6dro6x6zoyoyzroryozxot7tx7rzuututuotuluxuglxuyplugxihgijxgiiyffyiu3uocxi3epjxirpeoxeuoxeouovxvpxupveuxovoexieewvxxegixexueoxvxuehixoxbe8ve8xivxrvixv Explanation: 8yfih जब I HU i ftt7x7gvihctfufugcigcicthxucutcihchicihhihich |
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| 45. |
A parabolanone of theseClear selection7. Two parallel lines has/have:O unique solutiono infinitely many solutionOno solutionnone of these |
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Answer» H2d3dj3dbu3bfuebfi3idbiehifbirr3ogi4wlbv288u eqp8ygrqe0y80oieqघगकढगौऐघैथघथगैऐमजतमःघगैगघैइऐघमजथखढजयमगयदझभयजझघघझझदघजगरधसयझडबझाबझथखझबखःबथझबथखझबतजगबतेगथडेखथडझखडिझबगझभजगभेइथिऐथेइतढेथितढेईj28dh3ohxiehxeibdeix |
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| 46. |
Calculate the no of molecules in 224ml of O2 at NTP |
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| 47. |
Sand and saw dust cannot be separated by hand picking. Why? |
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Answer» Explanation: 1 ANSWER. (a) Because in hand picking method substances should be large enough in size to be RECOGNIZED and picked out by hand but SAND and saw DUST particles are very small in size so they can't be picked by hand. It can be separated by FILTRATION. |
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| 48. |
What is absorbed when a solution of potassium iodide is added to silver nitrate solution |
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Answer» Answer: A negatively charged SOLUTION of SILVER iodide is FORMED. This is DUE to absorption of iodide ions form depression medium on the precipitate of silver of iodide Explanation: HOPE you like the answer |
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| 49. |
What is vallancyChemistry class 7 plz answer it as fast as possible. |
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Answer» Answer: VALENCY is the combining power of an element. ELEMENTS in the same GROUP of the PERIODIC table have the same valency. |
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