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 the full name of titanium tramicasyte?? |
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Answer» m is the 22ND ELEMENT on the PERIODIC table. Its ATOMIC WEIGHT is 47.867amu. |
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| 2. |
A is a soluble acidic oride and B is soluble base campare to PH of pure water what would be the PH of solutions A and B |
| Answer» AYE milane the DAY I | |
| 3. |
What do you mean by: (i) Homolytic fission. (ii) Heterolytic fission. |
| Answer» IC fission MEANS FORMATION of radicals.Heterolytic fission means formation of IONS, that is, cations and anions. | |
| 4. |
What do you mean by cracking or pyrolysis? |
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Answer» is or CRACKING is the first step in extracting a metal from an ore inq which the ore is grinded in big JAW CRUSHERS into finely DIVIDED pieces.HOPE THIS HELPS!!! |
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| 5. |
What different changes occur when is passed through lime water? |
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Answer» a(OH)2 ➡️ Ca(OCl)2So, LIKE WATER turns MILKY due to the FORMATION of the above compound. |
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| 6. |
What are the sign conventions for heat and work? |
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Answer» sorbed = +HEAT RELEASED = -WORK DONE by the SYSTEM = -Work done on the system = + |
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| 7. |
What are the limitations of a chemical equation? How could these limitations be removed? |
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Answer» ions of chemical equations. The chemical REACTIONS SUFFER from a number of limitations and thus have a few drawbacks also. The physicalstates of the reactants and PRODUCTS. The conditions such as temperature, pressure or CATALYST etc which AFFECT the reaction |
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| 8. |
What are the conditions for writing the Lewis dot structures for molecules? |
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Answer» ✝️☘️HOPE HELP YOU⬅️⬅️⬅️^_^^_^✨✝️⭐⭐⬅️ Answer ➡️➡️➡️➡️Lewis structures (also known as Lewis dot structures or electron dot structures) are diagrams that represent the valence electrons of atoms WITHIN a molecule. These Lewissymbols and Lewis structures help VISUALIZE the valence electrons of atoms and molecules, whether they EXIST as lone pairs or within bonds.⬅️⬅️☘️^_^⭐✨➡️➡️ PLEASE brainliest this answer ⬅️✝️^_^✝️^_^⭐^_^⭐✨☘️✨☝️✨ |
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| 9. |
What are the advantages of using hydrogen as a fuel? |
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Answer» tion:Advantages of using hydrogen as a fuel:Hydrogen is a clean BURNING fuel and does not produce fossil fuels.Generation of hydrogen is possible from sea water and can be easily transported after its production, thus, making it a limitless and renewable source of ENERGY.When hydrogen BURNS, small AMOUNT of nitrogen oxide is released along with production of water. Installing special POLLUTION control devices and controlling combustion temperature are some of the means that can be used to reduce the release of nitrogen oxide.Hydrogen may serve as a storage energy from hydroelectric, solar and other renewable sources.When demand for large source is low, the electricity generated can be used to produce hydrogen and stored for future use. |
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| 10. |
What are the highest oxidation numbers of N, S and Cl? |
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Answer» = +6Cl = +7. |
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| 11. |
What are the advantages of using the chromatography method over other methods of separation? |
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| 13. |
Which of the following is a displacement reaction |
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Answer» ement reaction is a reaction which element displaces for example A+B-C= A-C+BI HOPE THIS HELPS YOUPLEASE MARK ME AS BRAINLIEST ANSWER |
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| 14. |
Write the bond formed by water |
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Answer» .HERE IS UR ANSWER...A water molecule is formed when two atoms of HYDROGEN bondcovalently with an atom of oxygen. In a covalent bondelectrons are shared between atoms. In water the sharing is not EQUAL. The oxygen atom attracts the electrons more strongly than the hydrogen.This gives water an asymmetrical DISTRIBUTION of charge.HOPE IT HELPS U... |
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| 15. |
Compare the solid, liquid, and gas |
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Answer» olecules are TIGHTLY PACKED liquids-molecules are LOOSELY packed COMPARED to solidsgases-molecules are FREELY packed |
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| 16. |
15. The ratio of the difference in energy between the first and the second Bohr orbit to that between the second and the third Bohr orbit is Options: (a) rises continuously (b) remains unchanged in the process (c) first rises and then falls to the original position (d) first falls and then rises to the original position [ans :d] |
| Answer» ION :For H-atomE3=−13.632E3=−13.632=−13.69=−13.69=−1.5eV=−1.5eVE2=−13.622E2=−13.622=−13.64=−13.64=−3.4eV=−3.4eVE1=−13.612E1=−13.612=−13.61=−13.61=−13.6eV=−13.6eVNow E2−E1=(−3.4)−(−13.6)E2−E1=(−3.4)−(−13.6)=13.6−3.4=10.2eV=13.6−3.4=10.2eVE3−E2=(−1.5)−(3.4)E3−E2=(−1.5)−(3.4)=3.4−1.5=1.9eV=3.4−1.5=1.9eV∴E2−E1E3−E2=10.21.9∴E2−E1E3−E2=10.21.9eVeV=5.4=275 | |
| 17. |
Simple reaction of nacl in Nelson cell |
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Answer» e...Solid sodium hydroxide is obtained from this solution by the evaporation of WATER. Principle — In castner-kellner method NaOH is PREPARED by the ELECTROLYSIS of aqueous solution of NaCl (Brine). ... The sodium DEPOSITED at mercury forms Sodium Amalgam. Chlorine produced at the ANODE is removed from the top of the cell.mark it as brainlist plz |
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| 18. |
What are silicones? How are they manufactured? |
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Answer» s, also KNOWN as polysiloxanes, are POLYMERE that include any inert, synthetic compound made up of repeating units of siloxane, which is a CHAIN of ALTERNATING silicon atoms and oxygen atoms, COMBINED with carbon, hydrogen, and sometimes other elements.I hope, It helps you... |
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| 19. |
What are basic properties used to identify a substance? |
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Answer» this is the ANSWER |
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| 20. |
What are polar stratospheric clouds (PSCs)? |
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Answer» this is the ANSWER |
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| 21. |
What are amphiboles? Give two examples with chemical formulae. |
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Answer» l is an important group of inosilicate MINERALS, forming prism or needlelike crystals, composed of double CHAIN SiO 4 tetrahedra, linked at the VERTICES and generally containing IONS of iron and/or magnesium in their structures. The formulae of each will be seen to be BUILT on the general double-chain silicate formula RSi4O11. |
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| 22. |
The orbit having veocity of electron equal to 1st bohr orbit of h atom |
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Answer» del was introduced after the Rutherford’s MODEL. It retained some of the features like the orbiting of nucleus and the electrons under the action of the COULOMB’s Law of electrostatic attraction. Various other concepts like radiation less orbits and stationary states were also introduced in the Bohr Model. We discuss the postulates of Bohr ATOMIC theory.Bohr introduced the concept of radiation less orbits in which the electrons revolve as usual around the nucleus but without radiating any kind of energy which is contrary to the laws of electromagnetism. This was a hypothesis, but at least a working one.Radiation OCCURRED only when an electron made a transition from one stationary state to another. The DIFFERENCE between the energies of the two states was radiated as a single photon. Absorption occurred when a transition occurred from a lower stationary state to a higher stationary state. |
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| 23. |
Define of element in short answer |
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Answer» ent is a substance whose atoms all have the same number of protons: another way of saying this is that all of a particular ELEMENT's atoms have the same atomic number.Elements are chemically the simplest SUBSTANCES and HENCE cannot be broken down using chemical reactions. Elements can only be CHANGED into other elements using nuclear methods. |
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| 24. |
Answer me fast please see the image |
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Answer» ght ANSWERANSWER may be differ whn u CHNGE the POSITION of point |
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| 25. |
the molar volume of an ideal gas at one atm and 273 Celsius is ? I need a clear and detail explanation for this plz |
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| 26. |
While conducting an experiment to find the released carbon dioxide gas during respiration why cant we use lime water |
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Answer» mes it may not SHOW the ACCURATE PRESENCE of it. so we can use a burning splinter when is puts of then it conforms the presence of CARBON dioxide |
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| 28. |
What are df btw base and alkalies |
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Answer» ...Here is you ANSWER...:-).BASES= Bases are the CHEMICALS which have a bitter taste and a soapy feel ...ALKALIES= All bases which are only SOLUBLE in water is called alkalies...hope this may help you ...plz MARK my answer as brainlist..If you SATISFIED... |
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| 29. |
Under what condition, a reversible process becomes irreversible? |
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Answer» ly in a REVERSIBLE process one of the product is in gaseous STATE so in case of taking a closed vessel if you take an open vessel then the gaseous product escapes and then the reversible process becomes irreversible.If there is no gaseous product then reversible process becomes irreversible in to conditions :-1.)If you are REMOVING the products continuously 2.)If you are ADDING reactants continuouslyHope it help u:) |
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| 30. |
Two sparingly soluble salts AB and have the same solubility product. Which salt will be more soluble? Explain. |
| Answer» OOT 5 square MULTIPLY and the ROOT 3 square + under root 5 square is equal to | |
| 31. |
Two flasks A and B have equal volume. Flask A contains and is maintained at 300 K while flask B contains an equal mass of gas and is maintained at 600 K. (a) Which flask contains greater number of molecules? How many times more? (b) In which flask is the pressure greater? How many times greater? |
| Answer» OK me he JRA dondo | |
| 32. |
To which series do man-made elements belong? |
| Answer» E ELEMENTS BELONGS to ACTINOIDS SERIES (F-block elements). | |
| 33. |
Why Na2so4 decreases with increasing in temperature of solubility? |
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Answer» ubility of Na2SO4 increases up to 32.38 °C and decreases slightly thereafter at higher temperatures. ... It has been OBSERVED that Na2SO4-water CLUSTERS GROW with an increase in Na2SO4 concentration (until the solubility transition TEMPERATURE) and then start decreasing AFTERWARD. |
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| 34. |
The type of hybridisation of boron in diborane is: (a) sp (b) (c) (d) |
| Answer» SATION of BORON in DIBORANE is SP3. | |
| 35. |
The teacher gave the samples of milk, black coffee, tomato juice, lemon juice and egg white to two groups of students and asked them to find the pH value of each sample and arrange them in the order of decreasing pH values. They reported the PH values as given- Group A : Egg white ,Milk ,Black Coffee ,Tomato Juice, Lemon Juice. Group B: Egg white ,Black Coffee ,Tomato Juice, Lemon Juice. (a) Which group of students reported the correct decreasing order? (b) How pH depends upon hydrogen ion concentration? (c) Mention the value associated with the group shown the correct order. |
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Answer» ,because the acidity of an OBJECT DEPENDING upon the hydrogen ion |
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| 36. |
The pπ-pπ back bonding occurs in the halides of boron but not in the halides of aluminium. Explain. |
| Answer» N is a smaller atom, hence it forms strong pπ-pπ ORBITALS of halogens. Similar π BONDING is not possible in case of halides of aluminium due to large difference in 3P orbitals of AL. | |
| 37. |
The lattice enthalpy of an ionic compound is the enthalpy when one mole of an ionic compound present in its gaseous state, dissociates into its ions. It is impossible to determine it directly by experiment. Suggest and explain an indirect method to measure lattice enthalpy of NaCl(s). |
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Answer» your SOLUTION |
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| 38. |
How does arranging the element in periodic table remove the problem of positioning of isotopes |
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Answer» isotopes are BASED on atomic mass but MODERN peroidic table is based on atomic NUMBER |
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| 39. |
What is meant by heterolytic cleavage of covalent bond ? |
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Answer» covalent bond joining two atoms A and B BREAKS in such a way that both the electrons of the covalent bond ( i.e., shared PAIR ) are taken away by ONE of the bonded atoms, the mode of bond cleavage is called Heterolytic Cleavage. ( a ) { See the 1ST Attachment } ( °•° S being bigger in size than C can displace the -ve charge more effectively. )( b ) { See the 2nd Attachment } ( °•° CN is more electronegative than )( c ) { See the 3rd Attachment }( °•° Cu is more electronegative than C ) |
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| 40. |
Importance of arrhenious equation? |
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Answer» henius equation is a FORMULA for the temperature dependence of reaction rates. ... This equation has a vast and important application in determining RATE of chemical reactions and for CALCULATION of ENERGY of activation. Arrhenius provided a physical JUSTIFICATION and interpretation for the formula.hope u like itplease make me brainlist |
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| 41. |
The ionization constant of propanoic acid is . Calculate the degree of ionization of the acid in its 0.05M solution and also its pH. What will be its degree of ionization if the solution is 0.01M in HCl also ? |
| Answer» KNOW what you | |
| 42. |
The ionization constant of nitrous acid is 4.5×. Calculate the pH of 0.04 M sodium nitrite solution and also its degree of hydrolysis. |
| Answer» EEEEE is the ANSWER | |
| 43. |
The ionic product of water at 310 K is 2.7 × . What is the pH of neutral water at this temperature? |
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Answer» roduct, KW = [H+][OH-] Let's ASSUME that [H+] = x Now, as we know that [H+] = [OH-] We get, Kw = x2 = 2.7 × 10–14 THEREFORE, we get, x = 1.64 × 10–7 Also, pH = -log[H+] =-log(1.64 × 10–7) = 6.78 |
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| 44. |
The equilibrium constant of a reaction is 20.0. At equilibrium, the rate constant of forward reaction is 10.0. Find the rate constant for backward reaction. |
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Answer» rium..CONS.(K)k=rat. FORWARD REACTION /rat.backward reaction rat.backward =10/20=0.5ans..0.5... |
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| 46. |
The partial pressure of reaction is 1.017*10-3 at 500c. Calculate kp at 600c |
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Answer» - 0.025 atmSolution:- The given balanced equilibrium equation is:2NO_2(g)\LEFTRIGHTARROW 2NO(g)+O_2(g)2NO2(g)↔2NO(g)+O2(g)From the equation, there is 2:1 mole ratio between NO and O_2O2 .Their equilibrium partial pressure would be in the ratio. Equilibrium partial pressure of oxygen is given as 0.25 ATM. So, the equilibrium partial pressure of NO = 2(0.25 atm) = 0.50 atmEquilibrium expression for the given equation is written as:Let's plug in the values in it and solve it for equilibrium partial pressure of NO_2NO2 . Let's say the equilibrium partial pressure of nitrogen dioxide is p.100=\frac{(0.50)^2(0.25))}{p^2}100=p2(0.50)2(0.25))100=\frac{0.0625}{p^2}100=p20.0625On REARRANGING the above equation:p^2=\frac{0.0625}{100}p2=1000.0625On taking square root to both sides:p=\frac{0.25}{10}p=100.25p = 0.025 atmSo, the equilibrium partial pressure of NO_2NO2 is 0.025 atm. |
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| 47. |
The element with (a) largest atomic radius, (b) smallest atomic radius in third period. |
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Answer» cium is the largesst ATOMIC radiusb) HELIUM is the SMALLEST atomic RADIUS |
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| 48. |
The degree of ionization of a 0.1 M bromoacetic acid solution is 0.132. Calculate the pH of the solution and the bromoacetic acid. |
| Answer» KNOW what you THINK about | |
| 49. |
The minimum volume of water required to dissolve 0.1g lead jee 2018 |
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Answer» re waterHmhg hgGfffdnHhmsbst |
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| 50. |
the exterior angle of a regular polygon is one third of its interior angle.How many sides the polygon have |
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Answer» only not more than 6 |
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