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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. |
Temperature required for liquid of water in kelvin |
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Answer» Answer: 273.15 KELVIN |
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| 2. |
Temperature change when zinc react with hydrochloric acid |
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Answer» Answer: when zinc react with HCL it RELEASES GAS of h2 so TEMPERATURE CHANGES |
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| 3. |
6.(a) Write a balanced chemical equation forprocess of photosynthesis.(b) When do desert plants take up carbondioxide and perform photosynthesis? |
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Answer» Explanation: A.simple WORD equation that can be used to describe the process of photosynthesis is carbon dioxide + water —> glucose + oxygen + water. A balanced chemical equation for the process can be WRITTEN as 6CO2 + 6H2O —> C6H12O6 + 6O2. Overall, photosynthesis uses LIGHT energy to convert carbon dioxide into a carbohydrate. B. In desert plants, the stomata is OPEN during night. During night, desert plants absorb carbon dioxide and form an intermediate. Then during day time when the stomata is closed to prevent loss of water, they use this stored carbon dioxide to perform photosynthesis. |
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| 4. |
CH3-CH=N-CH3 IUPAC NAME |
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Answer» fbnsnsndjsjahahsahhwhwhwqhuqisjshhddh |
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| 5. |
"We need to balance askeltal chemical equation.”Give reason to justify this statement. |
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Answer» Answer: We need to BALANCE askeltal chemical EQUATION because the equation is not balanced then it is POSSIBLE to show the complete chemical reaction. Hope U understan!!!!!:) plz mark as BRAINLIEST:):) |
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| 6. |
14. Fullerene is an allotrope of which atom?ABIN CODAIL |
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| 7. |
Which of the following upon checking with water will not form a true solution(a)alum (b)albumin (c)common salt (d)sucrose |
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Answer» it's ANSWER is b albumin plz MARK it brainiest |
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| 9. |
Various applications of metals,non metals and metalloids in our daily life. |
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| 10. |
Classify each of the following into elements components or mixtures |
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| 11. |
Why d-block elements are called transtion? |
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Answer» They are called TRANSITION elements because they have their LAST shell and penultimate shell(SECOND last shell) incomplete |
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| 12. |
Examples of third law of motion in our daily lives. |
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Answer» When you jump off a SMALL ROWING boat into water, you will PUSH yourself forward towards the water. |
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| 14. |
Name the two important ores of nickel.wow is nickel extracted from its important ores |
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Answer» Answer: Nickel: smelting, producing-Metalpedia Nickel is RECOVERED through extractive METALLURGY: it is extracted from its ores by conventional roasting and REDUCTION processes that yield a metal of greater than 75% purity. ... First, copper is removed by adding hydrogen sulfide, leaving a CONCENTRATE of only cobalt and nickel. Nickel: An introduction - Explain that Stuff Most of the nickel we use on Earth is mined from a NUMBER of nickel ores: pentlandite and pyrrhotite (iron nickel sulfides, the two most important nickel ores), garnierite (hydrous nickel silicate), millerite (nickel sulfide), and niccolite (nickel arsenide). |
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| 15. |
Why potato chips manufacture fill the packet of chips with nitogen gas |
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| 16. |
We get a white powder when we burn magnesium ribbon in air. Is this powder an element or a compound? Give reasons for your answer? |
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Answer» Explanation: oxygen and magnesium reacts TOGETHER to form magnesium oxide which is a compound |
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| 17. |
Name the sodium compound used as a cleansing agent of domestic purpose |
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| 19. |
Only compound whose density in solid state is less than its liquid state |
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Answer» Answer: ice is the COMPOUND whose DENSITY in SOLID STATE is less than its liquid state |
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| 20. |
On which factors the use of acid indicator in a titration depends |
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Answer» Answer: A substance that changes color in response to a CHEMICAL change. An acid–base INDICATOR (e.g., phenolphthalein) changes color DEPENDING on the pH. Redox INDICATORS are also used. A drop of indicator solution is added to the TITRATION at the beginning; the endpoint has been reached when the color changes |
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| 21. |
What is hg2 +2?what is its compound's names? |
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| 22. |
3. What difference in the properties of two miscibleliquids enables their seperation by fractional distillation ? |
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Answer» Answer: If this difference between the BOILING points of LIQUIDS is low then fractional DISTILLATION is used. |
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| 23. |
What happen when carbon react with sodium?? |
Answer» NA + C2→Na4C ... |
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| 24. |
the fine particles of an insoluble substance uniformly dispersed throughout the gas or liquid is called |
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Answer» Explanation: Answer : The fine particles of an INSOLUBLE substance uniformly dispersed throughout the GAS or liquid is CALLED COLLOIDAL solution |
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| 25. |
Balance the following equation Ca(OH)2 + HCl = CaCl2 + H2O. Explain too. |
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Answer» yshsysysjsusjjsusjsudj5jeus |
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| 27. |
When ferric oxide is heated with aluminum , it gives aluminum oxide and iron , what type of reaction is this ? |
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Answer» Displacement Reaction . Because exxhange of IONS OCCURS here. THANK u hope it HELPS u Plz mark as brainlist . |
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| 28. |
Why should acids be handled with care in the laboratory |
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Answer» Acids MUST be handled with care in laboratory because they are very dangerous. CARELESSNESS in HANDLING them can cause to many severe accidents Explanation: |
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| 29. |
Most metals do not react with bases but zinc metal does suggest a reason |
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Answer» Most metals do not react with bases but zinc METAL does because it is atmospheric. That is, it reacts with acids as well as bases. The reaction between zinc and NaOH is as follows: When sodium hydroxide SOLUTION is heated with zinc, then sodium zincate and hydrogen gas are formed. hope this is helpful to you ! |
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| 30. |
Name the alloy which has iron, nickel and chromium as its constituent. |
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Answer» STAINLESS steel is a metal alloy, made up of steel MIXED with elements such as chromium, nickel, molybdenum, silicon, aluminum, and carbon. Iron mixed with carbon to produce steel is the main COMPONENT of stainless steel. Chromium is added to make it resistant to rust. |
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| 31. |
Integrated rate expression for first order reaction |
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Answer» Answer: In the FIRST ORDER REACTION, the rate of the reaction is proportional to the first power of the concentration of the reactant. The sum of the powers of concentrations of reactants is equal to 1' Therefore, the rate LAW for this reaction is Rate ∝ [R] |
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| 32. |
What is d block elements |
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Answer» ,........................ |
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| 33. |
Reaction of acid chloride with organocopper compound |
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Answer» Explanation: As a RESULT, the scope of reactions involving organocopper reagents is extremely broad. ... Higher-order cyanocuprates (R2Cu(CN)Li2) are FORMED upon the reaction of an EQUIVALENT of ORGANOLITHIUM with a cyanocuprate. These reagents are more reactive towards substitution than the CORRESPONDING lower-order cyanocuprates. |
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| 34. |
iodized common salt is (a)homegeneous mixtures (b) heterogeneous mixture (c) pure substance (d) oxidized substance |
Answer» HETEROGENEOUS MIXTURE (B) |
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| 35. |
What is the application of law of mass action |
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Answer» Law of mass action, law stating that the rate of any chemical reaction is PROPORTIONAL to the product of the MASSES of the REACTING substances, with each mass raised to a power equal to the coefficient that occurs in the chemical equation. This law was formulated over the period 1864–79 by the Norwegian scientists Cato M. Guldberg and Peter Waage but is now of only historical INTEREST. This law was useful for obtaining the correct equilibrium equation for a reaction, but the rate expressions it provides are now known to apply only to elementary reactions. |
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| 36. |
Compare the properties of solid,liquid and gases on the basis of 1.rigidity 2.compressibility |
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Answer» Explanation: solid are rigid but can't be compressed liquid are FLUID and can't be compressed |
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| 37. |
Define oxidising agent and reducing agents |
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Answer» element which gets REDUCED are oxidizing AGENTS and element which gets OXIDIZED are reducing agents |
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| 38. |
you want to wear your favourite shirt for a party but the problem is that it is still wet after a wash.what steps would you take to dry it faster ? |
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Answer» Answer: Explanation: This can be done by the FOLLOWING (any one or more) steps (i) Dry it under the fan Under the fan when the speed of wind increases, the particles of water vapour from the SHIRT move away with the wind, decreasing the amount of water vapour in the surroundings. It increases the rate of evaporation of water and the washed wet shirt dries more quickly. (ii) Use HANGER for exposing its larger SURFACE to air When shirt is spread, it has large surface area. This makes the evaporation of water faster. Due to this, shirt dries up more quickly. (iii) Dry it in Sun On sunny day, temperature of atmosphere is more, therefore, the rate of evaporation increases. It is because, on increasing temperature, more particles of water get ENOUGH kinetic energy to go into the vapour state. This increases the rate of evaporation. (iv) Use iron By the use of iron, temperature increases and water converts into vapour state (steam) very quickly. Hence, rate of evaporation increases and shirt dries very quickly. |
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| 39. |
Say no for polyethylene bags and say yes for paper bags comment on this slogan. |
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Answer» Answers Well, plastic is a non-degradable substance. It is degrading the environment, as it has a bad impact on the environment. It is HAZARDOUS substance. Therefore, instead of using plastic bags we should use the paper bags. The paper bags do not HARM environment rather they easy going on environment, as they are MADE out of paper. Hope it helps you PLZZ mark me as BRILLIANIST |
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| 40. |
How does heating of sugar differ from heating of ammonium chloride |
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Answer» Answer: when the SUGAR is heated it melts and AFTERWARD caramelizes emitting the water. After this, it turns black(carbon) and after that converts to CO 2.It is chemical CHANGE. whereas , when ammonium chloride is heated it changes its state of matter from solid to gas (sublimation) , it is physical change it can be get by cooling gas particles of ammonium chloride. hope this is helpful to you ! please make it brain listed and click on thanks |
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| 41. |
250 ml of a sodium carbonate solution contains 2.65 grams of na2co3 |
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Answer» Explanation: MANY forms of baking powder contain sodium bicarbonate combined with CALCIUM ACID phosphate, sodium aluminium phosphate, or cream of tartar. Baking SODA is alkaline; the acid used in baking powder AVOIDS a metallic taste when the chemical change during baking creates sodium carbonate. |
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| 42. |
Most favourable conditions for the formation of ionic bonds are |
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Answer» 1) Low ionisation enthalpy of element FORMING caption 2)More negative electron gain ethalpy of element forming anion 3)High LATTICE ethalpy of the ionic compound form |
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| 43. |
Significance of proximate and ultimate analysis of coal |
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Answer» Answer: Carboxylation is a chemical reaction in which a carboxylic acid GROUP is PRODUCED by treating a substrate with carbon dioxide. The OPPOSITE reaction is decarboxylation |
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| 44. |
Show definition of conventional and non conventional energy |
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Answer» Answer: |
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| 45. |
Potassium permanganate solution for hard water make soft |
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Answer» Answer: |
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| 47. |
Plz can anyone help me with mole concept |
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| 48. |
16. in the above set up hydrogen gas is prepared by adding al. Sulphuric acid to Zinc granules(a) Write a balancedchemical equation for the Thatreaction taking place inthe flask.- Hydrogenas(b) Name the method ofcollection of hydrogen Contagas(0) Mention one physical -property of hydrogenthat you can be deducedthrough this method of collection |
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