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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. |
Define group: Illustrate the grouppostulates using water molecule |
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Answer» Answer: The group Cnv. ... Examples: H2O molecule BELONGS to the C2v group as it has the SYMMETRY elements E, C2, and two vertical mirror planes which are CALLED σv and σv. The NH3 molecule belongs to the C3v group as it has the symmetry elements E, C3, and three σv planes. Explanation: please follow me my dear friend please |
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| 3. |
Q.3. write down the chemical properties of carbon compounds. |
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Answer» Answer: Four IMPORTANT CHEMICAL reactions are discussed below: Combustion Reactions: When Carbon and its compounds burn in the PRESENCE of OXYGEN (or air), they give CO2, heat and light. ... OXIDATION Reactions: ... Addition reactions: ... Substitution Reaction: ... |
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| 4. |
The IUPAC name of isopropyl acetyleneis |
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Answer» The IUPAC NAME of ETHYL ISOPROPYL ACETYLENE is 2,2-dimethylhex-3-yne. |
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| 5. |
Compare the chemical properties of metals and nonmetals |
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Answer» Chemical Properties of Metals Metals vs Nonmetals The chemical properties of Metals and Nonmetals are described below. Let us start with the chemical properties of metals. The density of metals is usually high. Metals are malleable and ductile. Metals form an ALLOY with other metals or non – metals. Some metals react with air and corrode. For e.g. Iron. Metals are good conductors of heat and electricity. Lead is an exception. Generally, metals are in a solid state at room temperature. Except for Mercury. Mercury is in a LIQUID state. Many metals produce metal oxide by burning in the oxygen of the air. Highly REACTIVE metals react violently when they’re burnt in oxygen. Metals like sodium and potassium are stored in oil as they react with air in seconds. They’re highly reactive metals. Less reactive metals like gold, silver, PLATINUM, etc do not tarnish easily. They stay shiny and lustrous. Metals produce metal oxide and hydrogen gas while reacting with water. Soluble metal oxides dissolve in water and create metal hydroxide. Not all metals react with water. However, highly reactive metals like sodium and potassium react with water violently and an exothermic reaction takes places where the hydrogen immediately catches fire. Salt and hydrogen are produced when a metal reacts with an acid. Generally, a metal displaces a less reactive metal in a metal salt solution. Chemical Properties of Nonmetals In the chemical properties of metals and nonmetals, we will now see the chemical properties of nonmetals Nonmetals are poor conductors of heat and electricity. Graphite and Gas carbon are exceptions. Unlike metals, nonmetals aren’t malleable and ductile. Nonmetals react more with metals than with nonmetals. Usually, nonmetals react with other nonmetals in high temperature. Most nonmetals do not react with air in room temperature. White phosphorus is the only nonmetal that reacts with air to form its oxide by burning. Usually, nonmetals do not react with water. Except for Chlorine, chlorine dissolves in water to form an acidic solution. Nonmetals have a low density. They do not form alloys. However, nonmetals like carbon, silicon and phosphorous. Nonmetals exist in all states of matter at room temperature. Different nonmetals have different reactions. Chlorine is the most reactive metal in the halogen family i.e. Chlorine (Cl), Bromine (Br), Iodine (I), and Fluorine (F). The reactivity order of the halogen family is Cl > Br > I. Therefore, Chlorine (Cl) can displace Bromine (Br) and Iodine (I) from solutions of bromides (NaBr) and Iodides (NaI). Ionic solids are formed when nonmetals with high electronegativity react with alkali and ALKALINE earth metals.
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| 6. |
How does chemical coordination Occuse in plants |
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| 7. |
Na2SO4 + Bacl2 gives what please tell me |
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Answer» BASO4 + NaCl |
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| 8. |
Difference between copper and phosporous |
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Answer» Answer: Copper is a CHEMICAL element with the symbol Cu (from Latin: cuprum) and atomic NUMBER 29. It is a soft, malleable, and ductile metal with very HIGH thermal and electrical CONDUCTIVITY. A freshly exposed surface of pure copper has a pinkish-orange color. Phosphorus is a chemical element with the symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and RED phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth. Explanation: |
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| 9. |
Define group illustrate of group postulates using water molecule |
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| 10. |
प्रियोग्साला में सल्फर डाइऑक्साइड बनाए में निहित सिद्धांत को लिखे।SO2 किस प्रकार (1) NaOH तथा (2)H2O से अभिक्रिया करता है? |
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Answer» give me right answer |
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| 11. |
Covert 890m to nanometer |
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Answer» Answer: 890000000000 Explanation: |
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| 12. |
Please answer fast ........ |
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Answer» a) period 2 and GROUP 13 Explanation: b) Valency is 2 c)Mg3N2 d) It's NATURE is basic Hope it is HELPFUL !!! |
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| 14. |
Formation of day and night is which change |
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Answer» HEY mate Explanation: |
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| 15. |
What is rancidity? explain with example. |
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Answer» Answer: Rancidity is a condition in which the substance with oil and fats get oxidized when they are exposed to air A substance is said to be RANCID when there is a CHANGE in smell, TASTE, and COLOUR. An example of rancidity is when a chips pack is exposed to atmospheric air which results in a change in taste and odor... Explanation: HOPE it helps you.. |
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| 16. |
Ammonium carbonate reacts with dil. Sulphuric acid |
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Answer» HEY mate Explanation: NH4CO3+ H2SO4=NHS04+H20+C02 |
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| 17. |
Lithium is the most powerful reducing agent of alkali metals due to *small size of Li+ ionhighest hydration enthalpyhigh negative E0 valueAll of the above |
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Answer» all of the above Explanation: |
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| 18. |
Please solve this ............ |
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Answer» Answer:1) Fe + H2So4 ------> FeSo4 + H2O [ALREADY balanced] 2) S+6HNO3→H2SO4+2H2O+6NO2 3)NaCl + H2SO4 = Na2SO4 + HCl 4) 2 AgNO3(l) → 2 Ag(s) + O2(g) + 2 NO2(g) 5) Al(OH)3 + H3PO4 → AlPO4 + 3 H2O Explanation: |
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| 19. |
Why are the anode and cathode compartmentsseparated in the extraction of sodium. |
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Answer» Answer: Downs Cell for the Production of Sodium In the Downs Cell a circular IRON CATHODE surrounds the carbon anode and the PRODUCTS of the electrolysis are SEPARATED by STEEL mesh or gauze to prevent them coming into contact and reforming sodium chloride. |
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| 20. |
Hydrogen AVN oxygen ke Labh Hani ke sandarbh mein oxyikaran avkaran abhikriyayo ko Samjhana |
Answer» IN A CHEMICAL SUBSTANCE THE ELEMENT ARE ALL WAYS PRESENT IN DEFINITE PROPORTION BY MASS |
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| 21. |
How many grams of oxygen will berequired to react completely with 27 gof Al? (Atomic mass : Al= 27, O = 16)b. 16d. 32a. 8c. 24 |
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Answer» Mark me as BRAINLIEST and follow |
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| 22. |
Which ray travel from cathode to anode |
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Answer» Anode RAY tube These rays are BEAMS of PARTICLES moving in a direction opposite to the "cathode rays", which are streams of electrons which move toward the anode. Goldstein CALLED these positive rays Kanalstrahlen, "channel rays" or "canal rays", because they were produced by the HOLES or channels in the cathode. |
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| 24. |
What is Concestration of H+ in the pure water |
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Answer» Answer: HEY mate Explanation: |
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| 25. |
Which one has greater electronic affinity and why? cl or f |
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Answer» Chlorine Explanation: Fluorine, which is higher up the group then chlorine, has a lower ELECTRON affinity. This is because the electrons in the outermost shell of a fluorine atom are closer TOGETHER. ... Energy is REQUIRED to keep the GAINED electron in the shell, causing fluorine to have a smaller electron affinity than chlorine. |
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| 26. |
Which of the following is covalent solid?निम्न में से कौनसा सहसंयोजक ठोस है?AAINBCCIACIceबर्फDAll of theseइनमें से सभी |
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Answer» ICE is COVALENT solid other OPTIONS I can't understand write the properly |
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| 27. |
The standard molar heat of formation of ethane, CO2 and water (l) are −21.2,−94.1 and −68.3 kcal respectively. The standard molar heat of combustion of ethane will be ?_______________________Give detailed explanation...!!class 11science students plz help |
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Answer» Explanation: 2C(s) +3H 2
(g) → C 2
(g) ΔH
C(s) +O 2
(g) → CO 2
(g) ΔH
f=-94.1 kcal H 2
(s) + 2 1
O 2
(g) → H 2
O(l) ΔH
f=-68.3 kcal C 2
H 6
+ 2 1
O 2
→ 2CO 2
+ 3 H 2
O ΔH
f ′
ΔH
f ′ =(21.1) -(2 X 91.1) -(68.3 x 3) =-372 kcal mor −1
Answered By |
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| 28. |
Hunodiecter Reaction is suitableonly fortheofpreparation of- |
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Answer» SORRY i can say answer ok |
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| 29. |
Which of species is not paramagnetic? a) Na+b) Cl-c) Ne2+d) b+ |
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Answer» NE2+ is not PARAMAGNETIC because there are no UNPAIRED electrons Explanation: |
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| 31. |
निबंधविषय - कोरोना तालाबन्दी के दौरान आपको और आपके परिवार को कोन-2 सी परेशानियों का सामना करना पडा? और आपने उनका निवारण कैसे किया?(200 शब्द) for class10 |
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Answer» Answer: mari parevar ko KHANE or bhaar NA nekal nike parishaniyo ka SAMANA karana PADA |
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| 32. |
Lyman series from the 5th level. (R = 109.686x105 m-1)(Non-anonymous question)Required to answer. .(1 Point) |
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| 33. |
Define Rancidity..... |
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Answer» Explanation: Rancidification is the process of complete or incomplete oxidation or hydrolysis of fats and OILS when exposed to air, light, or moisture or by bacterial action, RESULTING in unpleasant taste and ODOR. ... When these processes occur in FOOD, undesirable odors and flavors can result. |
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| 34. |
Which of the following changes cannot be reversed to obtain the original |
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Answer» Answer: CHANGES that cannot be reversed are called IRREVERSIBLE changes. Some examples are as follows : Milk into curd. Burning of wood. Explanation: |
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| 35. |
deduce the chemical formula of 1.calcium chloride 2. sodium chlorate 3. potassium permanganate 4.magnesium silicate 5.zincate plumbate |
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Answer» pls MARK as BRAINLIEST |
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| 36. |
Mixture provides highest flametemperature. |
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Answer» Answer: The CLOSEST will be the hottest PART of a flame, where the combustion reaction is most efficient. This also assumes COMPLETE combustion (e.g. PERFECTLY BALANCED, non-smokey, usually bluish flame). |
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| 38. |
On dissolving, a salt in water, Amita observed a blue coloured solution. the salt could be |
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| 39. |
Experiment effect of heat an ice |
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Answer» Answer: The stop watch was started and the ice was heated steadily (the BUNSEN FLAME ... The EXPERIMENTER stood up throughout the experiment, as being SEATED ... |
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| 40. |
I not said to 10 or 11 stander guess thanksno i am noth in stander 9 i am in stander8 ooooohh |
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| 41. |
6. Define the meaning of animation |
Answer» ANIMATION is the process of making FILMS in which drawings or puppets appear to move. ... computer animation. 2. countable NOUN. An animation is a film in which drawings or puppets appear to move. |
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| 42. |
The temperature of the flame in flamephotometer is controlled by ----------- andused in the flame.oxidant and reductantfuel and oxidantfuel and reductantoxidant and thermometer |
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Answer» FUEL and oxidant is your answer Explanation: |
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| 43. |
What do you mean by a forest fire |
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Answer» Answer: Wildfire, also called forest, bush or vegetation fire, can be described as any uncontrolled and non-prescribed COMBUSTION or burning of plants in a NATURAL setting such as a forest, grassland, brush land or tundra, which consumes the natural FUELS and SPREADS based on ENVIRONMENTAL conditions (e.g., wind, topography). |
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| 44. |
2 SO2 (g) + O2(g) ↔ 2 SO3 (g) , consider this equilibrium, what is the effect of increase in pressure on Kp value? |
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Answer» Explanation: When there is an increase in pressure, the equilibrium will shift towards the side of the REACTION with FEWER moles of gas. When there is a DECREASE in pressure, the equilibrium will shift towards the side of the reaction with more moles of gas. |
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| 45. |
Discuss the different blocks in the modern periodic table |
Answer» Answer is given below ➡Each BLOCK is named after its characteristic orbital: s-block, p-block, d-block, and f-block. The block names (s, p, d, and f) are DERIVED from the spectroscopic notation for the value of an electron's azimuthal quantum number: SHAPE (0), principal (1), diffuse (2), or fundamental (3). If it is helpful to you then plzz follow me and mark me as brainlist 40 thanks ↔ 40 thanks 65 thanks ↔ Inbox u |
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| 46. |
Give formula of triammine dichloride ethane 1,2 diammine mangnese 4 sulphate |
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Answer» give formula of triammine dichloride ethane 1,2 diammine MANGNESE 4 SULPHATE |
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| 47. |
2. The Sun delivers roughly 1 kW m- of power to theEarth's surface. A parabolic mirror with a l m radius is usedto focus this energy onto a beaker containing 1 L of water.Estimate the time taken by the mirror to raise the temperature of thewater by 50°C, assuming the specific heat capacity of waterto be 4200 JK-l kg and ignoring energylosses to the surroundings. |
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Answer» ᴀ ғᴏʀᴄᴇ ɪs ᴀ ᴘᴜsʜ ᴏʀ ᴘᴜʟʟ ᴜᴘᴏɴ ᴀɴ ᴏʙᴊᴇᴄᴛ..... sᴏʀʀʏ ғᴏʀ ᴛʜᴇ ɪɴᴄᴏɴᴠᴇɴɪᴇɴᴄᴇ........ |
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| 48. |
Which of the following is most acidic |
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Answer» Answer: The structure given in Option C is most acidic. Due to the PRESENCE of Chlorine ATOM in a COMPOUND such as m-chlorophenol, it is considered as most acidic than phenol, benzyl alcohol, and cyclohexanol |
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| 49. |
And plz explain it......... |
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Answer» Answer: B. Explanation: TETRAFLUOROETHYLENE (TFE) is a FLUOROCARBON with the chemical formula C2F |
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| 50. |
Write the IUPAC dot structure forC1112сня — сH — ан, — си, сн,lCH₂|CH3Днен —CH-CH — — |
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Answer» KANT UNDERSTOOD the QUESTION is it in other LANGUAGE |
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