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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 52301. |
-CHO group is |
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Answer» `+Me and +IE`GROUPS |
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| 52302. |
…………. charge produce in phenol ring by resonance but due to resonance in nitrobenzene ………. charge is produce on ring. |
| Answer» SOLUTION :NEGATIVE , POSITIVE | |
| 52303. |
............... can be used to reduce particulate pollutant. |
| Answer» SOLUTION :ELECTROSTATIC PRECIPITATOR | |
| 52304. |
: C Cl_(2) is |
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Answer» an electrophile |
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| 52305. |
......... are found toxic for mammals. |
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Answer» SODIUM chlorate |
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| 52306. |
........ and ........ metals are use in photoelectric cells. |
| Answer» SOLUTION :CESIUM, POTASSIUM | |
| 52307. |
…….. and …….is the suffix of aldehyde and hydroxyl functional group |
| Answer» SOLUTION :AL and OL | |
| 52308. |
........ and ........ chemicals reacts as a poison for nervus system. |
| Answer» SOLUTION :ORGANOPHOSPHATE, CARBAMATE | |
| 52309. |
....... and ........ is formed by reaction of ozone present in the air with hydrocarbon. |
| Answer» SOLUTION :FORMALDEHYDE, acrolene | |
| 52310. |
…… an amorphous form of silica is used in filtration plants. |
| Answer» SOLUTION :Kieselghur | |
| 52311. |
........ alloys are used to form springs with high strength. |
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Answer» CU - Be |
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| 52312. |
..... alloy is used to prepare aeroplane, as they are light in weight. |
| Answer» Answer :D | |
| 52313. |
_______ alloy is used in making white metal bearings for motor engines? |
| Answer» SOLUTION :LITHIUM + LEAD | |
| 52315. |
_______ alkaline earth metal do not import colour to a non-luminous flame. |
| Answer» SOLUTION :BERYLLIUM | |
| 52316. |
. Alkali metals give colouration when heated in Bunsen flame. Give reason. |
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Answer» Solution :When the alkali METALS salts moistened with concentrated hydrochloric acid are near a platinum wire in a flame, they show characteristic COLOURED flame LithiumCrimson red SodiumYellow PotassiumLilac RubidiumReddish violet CaesiumBlue The heat in the flame excites the valence ELECTRON to a higher energy level. W BACK to its actual energy level, the excess ne excess energy is emitted as light whose wa in the visible region produces colour. |
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| 52317. |
How does tubular secretion help in maintaining ionic and acid-base balance in body-fluids? |
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Answer» Carbonicacid |
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| 52318. |
........... acid is produce at the end of hydrolysis of SiCl_4. |
| Answer» Solution :SALICYLIC ACID - `SI(OH)_4` | |
| 52320. |
,A and other products formed are |
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Answer»
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| 52321. |
. A and B are |
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Answer»
 If we USE `H_2O_2`, aldehydes that FORM will be oxidised to give carboxylic ACIDS |
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| 52322. |
+2 oxidationstate of lead is more stablethan +4 oxidation state . Give reasons. |
| Answer» Solution :Among the elements of group 14, carbon does not have d- or f-electrons . Therefore , it does not show inert pair EFFECT. Consequently, it shows an oxidationstate of`+4`due to the presenceof TWO electrons in the s- andtwo electronsin the p-orbitalof thevalenceshell. In contrast , all other elements from Ge to Pb containeither dor both d- and f-electron increases, the inertpair effect becomesmore and more prominent. In other words,as we move dow the group from Ge to Pb, the STABILITY of +2 oxidation stateincreases whilethat of `+4` oxidationstate decreases.Therefore , the tendencyof Ge, SN and Pb to EXHIBIT +2 oxidation state increases with increasing atomic number in group 14. | |
| 52323. |
+2 oxidation state of lead is more stable than +4, because of |
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Answer» PENETRATION power |
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| 52324. |
-100 cm^3 of 0.1 M HCl and 100 cm^2 of 0.1.M NaOH solutions are mixed in a calorimeter. If the heat liberated is "Q" K.Cal, the heat of neutralization (DeltaH) (in K.Cal) of HCl_((aq)) and NaOH_((aq)) is |
| Answer» ANSWER :B | |
| 52326. |
^^=^^ ^(0)-bsqrt(c) is called as |
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Answer» FARADAY's EQUATION |
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