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InterviewSolution
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.
| 8301. |
What is the mass of 2 moles of CO2 |
| Answer» What is the mass of 2 moles of CO2 | |
| 8302. |
the ratio of the energy of electrons on 1st shell of he+ and 3rd shell of li+2 |
| Answer» the ratio of the energy of electrons on 1st shell of he+ and 3rd shell of li+2 | |
| 8303. |
What happens to the crystals of washing soda when exposed to air? |
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Answer» What happens to the crystals of washing soda when exposed to air? |
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| 8304. |
Which of the following characteristics do alloys have? |
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Answer» Which of the following characteristics do alloys have? |
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| 8305. |
In a factory, holes need to be drilled in steel to manufacture car parts. While doing this, the drill and steel get very hot due to friction and this can damage both. To solve this problem, a mixture of oil and water is sprayed onto the drill bit. The mixture acts as both a coolant and a lubricant. At the end of the process, there is a waste mixture of fine steel bits, dirty oil and water. To avoid wastage and pollution, it is advisable to separate the waste mixture and reuse the components.Answer these questions.1. Suggest two methods of removing the bits of steel from the waste mixture in order to recycle them.2. How can the oil and water be separated? |
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Answer» In a factory, holes need to be drilled in steel to manufacture car parts. While doing this, the drill and steel get very hot due to friction and this can damage both. To solve this problem, a mixture of oil and water is sprayed onto the drill bit. The mixture acts as both a coolant and a lubricant. At the end of the process, there is a waste mixture of fine steel bits, dirty oil and water. To avoid wastage and pollution, it is advisable to separate the waste mixture and reuse the components. Answer these questions. 1. Suggest two methods of removing the bits of steel from the waste mixture in order to recycle them. 2. How can the oil and water be separated? |
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| 8306. |
Biphenyl carbocation and cyclopropylmethyl carbocation.Which is more stable. Explain |
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Answer» Biphenyl carbocation and cyclopropylmethyl carbocation. Which is more stable. Explain |
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| 8307. |
If a fused metallic chloride is electrolysed, at which electrode would the metal be obtained? |
| Answer» If a fused metallic chloride is electrolysed, at which electrode would the metal be obtained? | |
| 8308. |
9. give reason for the following order of the acidic strength of the following - H3PO2> H3PO3> H3PO4 |
| Answer» 9. give reason for the following order of the acidic strength of the following - H3PO2> H3PO3> H3PO4 | |
| 8309. |
The reaction in which one type of atom or group of atoms takes the place of another atom is called: |
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Answer» The reaction in which one type of atom or group of atoms takes the place of another atom is called: |
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| 8310. |
Name some ores from which aluminium can be extracted. |
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Answer» Name some ores from which aluminium can be extracted. |
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| 8311. |
Write the reactions of SO2 and oxides of nitrogen which leads to acid rain formation? |
| Answer» Write the reactions of SO2 and oxides of nitrogen which leads to acid rain formation? | |
| 8312. |
(a) What is the difference between a mineral and an ore? (b) Which metal is extracted from cinnabar ore? (c) Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula. (d) How is sodium metal extracted? Explain with the help of the equation of the reaction involved. (e) Name three other metal s which are extracted in a manner similar to sodium. |
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Answer» (a) What is the difference between a mineral and an ore? |
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| 8313. |
H+ and OH− ions combine to form . |
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Answer» H+ and OH− ions combine to form |
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| 8314. |
Q.43A : An absorption spectrum is like the photographic negative of an emission spectrum.R : The characteristic lines in atomic spectra can be used in chemical analysis to identify unknown atoms in the same way as finger prints are used to identify people. |
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Answer» Q.43 A : An absorption spectrum is like the photographic negative of an emission spectrum. R : The characteristic lines in atomic spectra can be used in chemical analysis to identify unknown atoms in the same way as finger prints are used to identify people. |
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| 8315. |
As compared to lithium, sodium reacts quickly with water because |
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Answer» As compared to lithium, sodium reacts quickly with water because |
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| 8316. |
Is there a metal gaseous at room temperature? |
| Answer» Is there a metal gaseous at room temperature? | |
| 8317. |
(a) Select from the list given below (A to F), the one substance in each case which matches the descriptions given in parts (ii) to (vi). Copy and complete the given grid with your answers as shown for part (i). (i) (ii) (iii) (iv) (v) (vi) A A AmmoniaB Copper oxideC Copper sulphateD Hydrogen chlorideE Conc. sulphuric acidF Lead bromide(i) Although this compound is not a metal hydroxide, its aqueous solution is alkaline in nature.(ii) A solution of this compound is used as the electrolyte when copper is purified.(iii) When this compound is electrolysed in the molten state, lead is obtained at the cathode.(iv) This compound can be oxidized to chlorine.(v) This is used to prepare volatile acids.(vi) This compound can be reduced to copper when heated with coke. |
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Answer» (a) Select from the list given below (A to F), the one substance in each case which matches the descriptions given in parts (ii) to (vi). Copy and complete the given grid with your answers as shown for part (i).
A Ammonia B Copper oxide C Copper sulphate D Hydrogen chloride E Conc. sulphuric acid F Lead bromide (i) Although this compound is not a metal hydroxide, its aqueous solution is alkaline in nature. (ii) A solution of this compound is used as the electrolyte when copper is purified. (iii) When this compound is electrolysed in the molten state, lead is obtained at the cathode. (iv) This compound can be oxidized to chlorine. (v) This is used to prepare volatile acids. (vi) This compound can be reduced to copper when heated with coke. |
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| 8318. |
Which of the assumptions of the kinetic-molecular theory best explains the observation that a balloon collapses when exposed to liquid nitrogen (which is much colder than a cold winter day)? |
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Answer» Which of the assumptions of the kinetic-molecular theory best explains the observation that a balloon collapses when exposed to liquid nitrogen (which is much colder than a cold winter day)? |
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| 8319. |
A yellow colored compound'X'is a photo sensitive material on exposure to light it gives substance 'Y' and brown fumes of a gas'z'. Identify x,y,z. Write the balanced chemical equation for the reaction. |
| Answer» A yellow colored compound'X'is a photo sensitive material on exposure to light it gives substance 'Y' and brown fumes of a gas'z'. Identify x,y,z. Write the balanced chemical equation for the reaction. | |
| 8320. |
What is the meaning of tengention |
| Answer» What is the meaning of tengention | |
| 8321. |
What are the uses of ammonia? |
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Answer» What are the uses of ammonia? |
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| 8322. |
Which among the given metals is the most suitable one for galvanizing iron? |
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Answer» Which among the given metals is the most suitable one for galvanizing iron? |
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| 8323. |
Suresh was a drunkard, everyday he drinks alcohol and fights with everyone. One day Ravi added a compound X to his drink after which Suresh started feeling blindness and after sometime he was dead. Identify the compound X? |
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Answer» Suresh was a drunkard, everyday he drinks alcohol and fights with everyone. One day Ravi added a compound X to his drink after which Suresh started feeling blindness and after sometime he was dead. Identify the compound X? |
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| 8324. |
The compounds with alkoxy group are known as |
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Answer» The compounds with alkoxy group are known as |
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| 8325. |
how to make resonating structure? |
| Answer» how to make resonating structure? | |
| 8326. |
Define a polymer. |
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Answer» Define a polymer. |
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| 8327. |
At what pressure and temperature does ammonia turn into liquid? |
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Answer» At what pressure and temperature does ammonia turn into liquid? |
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| 8328. |
Which of the following formulae are correctly mentioned? |
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Answer» Which of the following formulae are correctly mentioned? |
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| 8329. |
Can DIBAL H reduce alkenes to alkanes? |
| Answer» Can DIBAL H reduce alkenes to alkanes? | |
| 8330. |
The number of radial nodes of an orbital having principal quantum number of n and azimuthal quantum number of l is |
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Answer» The number of radial nodes of an orbital having principal quantum number of n and azimuthal quantum number of l is |
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| 8331. |
A colourless gas X reacts with another colourless gas HCl to give a white solid of NH4Cl.What is X? |
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Answer» A colourless gas X reacts with another colourless gas HCl to give a white solid of NH4Cl.What is X? |
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| 8332. |
Cost of fructose (fruit sugar) (C6H12O6) is Rs 80 per kg. Calculate its cost per mole. |
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Answer» Cost of fructose (fruit sugar) (C6H12O6) is Rs 80 per kg. Calculate its cost per mole. |
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| 8333. |
Question 5.2Translate the following statement into chemical equation and then balance it:Hydrogen sulphide gas burns in air to give water and sulphur dioxide. |
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Answer» Question 5.2 Translate the following statement into chemical equation and then balance it: Hydrogen sulphide gas burns in air to give water and sulphur dioxide. |
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| 8334. |
Question 6 What are amphoteric oxides? Give two examples of amphoteric oxides. |
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Answer» Question 6 What are amphoteric oxides? Give two examples of amphoteric oxides. |
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| 8335. |
What is the main constituent of vinegar? |
| Answer» What is the main constituent of vinegar? | |
| 8336. |
Taking the example of an element of atomic number 16, explain how the electronic configuration of the atom of an element relates to its position in the modern periodic table and how valency of an element is calculated on the basis of its atomic number. |
| Answer» Taking the example of an element of atomic number 16, explain how the electronic configuration of the atom of an element relates to its position in the modern periodic table and how valency of an element is calculated on the basis of its atomic number. | |
| 8337. |
Which of the following is the most malleable metal? |
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Answer» Which of the following is the most malleable metal? |
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| 8338. |
the activation energy for the forward reaction R p -30 is 40 |
| Answer» the activation energy for the forward reaction R p -30 is 40 | |
| 8339. |
How are metals of different reactivity reduced? |
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Answer» How are metals of different reactivity reduced? |
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| 8340. |
44.The ratio of mass percent of C and H of an organic compound (C_xH_yO_z) is 6:1. If one molecule of the above compound (C_xH_yO_z) contains half as much oxygen as required to burn one molecule of compound C_xH_y completely to CO_2 and H_2O. The emperical formula of the compound C_xH_yO_z is |
| Answer» 44.The ratio of mass percent of C and H of an organic compound (C_xH_yO_z) is 6:1. If one molecule of the above compound (C_xH_yO_z) contains half as much oxygen as required to burn one molecule of compound C_xH_y completely to CO_2 and H_2O. The emperical formula of the compound C_xH_yO_z is | |
| 8341. |
Statement 1: Hydrogen atom just needs 1 extra electron to fill its outer-most orbit.Statement 2: The first orbit can occupy only 2 electrons. |
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Answer» Statement 1: Hydrogen atom just needs 1 extra electron to fill its outer-most orbit. Statement 2: The first orbit can occupy only 2 electrons. |
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| 8342. |
10. The correct strengths of the carboxylic acids is |
| Answer» 10. The correct strengths of the carboxylic acids is | |
| 8343. |
2 Bromopropane is treated with alcoholic KoH solution .The major produvt formed in this reaction and the typeof reaction respectively are |
| Answer» 2 Bromopropane is treated with alcoholic KoH solution .The major produvt formed in this reaction and the typeof reaction respectively are | |
| 8344. |
A quantity of aluminium has a mass of 54.0 g. What is the mass of the same number of magnesium atoms?(At. wt. Al = 27, Mg = 24) |
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Answer» A quantity of aluminium has a mass of 54.0 g. What is the mass of the same number of magnesium atoms? (At. wt. Al = 27, Mg = 24) |
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| 8345. |
The amine that reacts with Hinsberg's reagent to give an alkali insoluble product is: |
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Answer» The amine that reacts with Hinsberg's reagent to give an alkali insoluble product is: |
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| 8346. |
(a) Name the process used for the large scale manufacture of sulphuric acid.(b) Which property of sulphuric acid accounts for its use as a dehydrating agent?(c) Concentrated sulphuric acid is both an oxidising agent and a non-volatile acid. Write one equation each to illustrate the properties of sulphuric acid mentioned above. |
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Answer» (a) Name the process used for the large scale manufacture of sulphuric acid. |
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| 8347. |
Which of the following produces Benzene as a byproduct? |
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Answer» Which of the following produces Benzene as a byproduct? |
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| 8348. |
How to draw resonance structures? |
| Answer» How to draw resonance structures? | |
| 8349. |
The ionic product of water at 25^° C is 10-14. Itsionic product at 90^° C will be(1) 1 x 10-14(2) 1x 10-16(3) 1 x 10-20(4) 1x 10-12 |
| Answer» The ionic product of water at 25^° C is 10-14. Itsionic product at 90^° C will be(1) 1 x 10-14(2) 1x 10-16(3) 1 x 10-20(4) 1x 10-12 | |
| 8350. |
Benzene has alternativev double and single bond but its both length in carbon carbon moleules have same. Why? |
| Answer» Benzene has alternativev double and single bond but its both length in carbon carbon moleules have same. Why? | |