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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.
| 3451. |
When the following five anions are arranged in order of decreasing ionic radius, the correct sequence is? |
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Answer» When the following five anions are arranged in order of decreasing ionic radius, the correct sequence is? |
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| 3452. |
Which compound acts as a solvent in aqueous solution? |
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Answer» Which compound acts as a solvent in aqueous solution? |
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| 3453. |
Write the name and the colour of the precipitate formed when sodium hydroxide is added to FeCl3 solution. |
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Answer» Write the name and the colour of the precipitate formed when sodium hydroxide is added to FeCl3 solution. |
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| 3454. |
Which of the following act as decomposers in an ecosystem? (a) Lactobacillus bacteria (b) Cyanobacteria (c) Putrefying bacteria (d) Rhizobium bacteria |
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Answer» Which of the following act as decomposers in an ecosystem? (a) Lactobacillus bacteria (b) Cyanobacteria (c) Putrefying bacteria (d) Rhizobium bacteria |
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| 3455. |
11. Equivalent mass of Fe2S3 in the below reaction is if it's molar mass M Fe2S3+O2=Fe2O3+SO2 1.M/2 2.M/20 3.M/22 4.M/24? |
| Answer» 11. Equivalent mass of Fe2S3 in the below reaction is if it's molar mass M Fe2S3+O2=Fe2O3+SO2 1.M/2 2.M/20 3.M/22 4.M/24? | |
| 3456. |
Which of the following is/was name given to the solution of Hydrogen chloride in water? |
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Answer» Which of the following is/was name given to the solution of Hydrogen chloride in water? |
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| 3457. |
14. How to find the hybridization of Agcl2- using concept of orbitals?My query is that there are d orbitals in Ag but not p so how to know? |
| Answer» 14. How to find the hybridization of Agcl2- using concept of orbitals?My query is that there are d orbitals in Ag but not p so how to know? | |
| 3458. |
A student was given two metal strips X and Y alongwith colourless silver nitrate solution to perform two separate displacement reactions. When the student placed metal strip X in silver nitrate solution for a considerable time, he observed that the solution turned blue and a coating of silver metal was formed on the strip. And when the student immersed metal strip Y in silver nitrate solution for an equal time, he observed that the solution turned light green with the formation of a coating of silver metal on the strip. The correct conclusion of the student about the identity of metals X and Y is :(1) X is copper and Y is magnesium(2) X is zinc and Y is copper(3) X is iron and Y is copper (4) X is copper and Y is iron |
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Answer» A student was given two metal strips X and Y alongwith colourless silver nitrate solution to perform two separate displacement reactions. When the student placed metal strip X in silver nitrate solution for a considerable time, he observed that the solution turned blue and a coating of silver metal was formed on the strip. And when the student immersed metal strip Y in silver nitrate solution for an equal time, he observed that the solution turned light green with the formation of a coating of silver metal on the strip. The correct conclusion of the student about the identity of metals X and Y is : (1) X is copper and Y is magnesium (2) X is zinc and Y is copper (3) X is iron and Y is copper (4) X is copper and Y is iron |
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| 3459. |
3.9g of a mixture of al and al2o3 is reacted with dil.hcl then 224ml h2 gas is evolved at ntp calculate percentage of al in the mixture . |
| Answer» 3.9g of a mixture of al and al2o3 is reacted with dil.hcl then 224ml h2 gas is evolved at ntp calculate percentage of al in the mixture . | |
| 3460. |
What are the composition of amino acid |
| Answer» What are the composition of amino acid | |
| 3461. |
Which is more acidic and why?Cl-CH2-CH2-COOH, Ph-COOH, CH3-COOH |
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Answer» Which is more acidic and why? Cl-CH2-CH2-COOH, Ph-COOH, CH3-COOH |
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| 3462. |
Q.In chlor alkali process, why NaOH is near cathode why it is not near anode? |
| Answer» Q.In chlor alkali process, why NaOH is near cathode why it is not near anode? | |
| 3463. |
charge present in ethylene diammine |
| Answer» charge present in ethylene diammine | |
| 3464. |
The theoretical probability of getting a head in a toss of a coin is __. Give the answer up to 1 decimal place. |
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Answer» The theoretical probability of getting a head in a toss of a coin is |
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| 3465. |
How does nitric acid react with metals? Why is H2 gas not obtained as one of the products during the reaction? [5 MARKS] |
| Answer» How does nitric acid react with metals? Why is H2 gas not obtained as one of the products during the reaction? [5 MARKS] | |
| 3466. |
Name the various types of chemical reactions. |
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Answer» Name the various types of chemical reactions. |
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| 3467. |
The increasing order of bond dissociation energies of C - C, C - H and H - H bonds is |
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Answer» The increasing order of bond dissociation energies of C - C, C - H and H - H bonds is |
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| 3468. |
0.126 g of an acid requires 20ml of 0.1N NaOH for complete neutralisation. Eq wt of the acid is? |
| Answer» 0.126 g of an acid requires 20ml of 0.1N NaOH for complete neutralisation. Eq wt of the acid is? | |
| 3469. |
ntA sample of CaCO3has Ca = 40%, C = 12% and O = 48%. If the law of constant proportion is true, then the mass of O in 15 g CaCO3from another source will ben |
| Answer» ntA sample of CaCO3has Ca = 40%, C = 12% and O = 48%. If the law of constant proportion is true, then the mass of O in 15 g CaCO3from another source will ben | |
| 3470. |
The following figure shows the unit cell of a compound, i.e., a mixed oxide of yttrium, barium and copper. The formula of mixed oxide is YaBabCucOd.Find the value of a+b+c+d. |
Answer» The following figure shows the unit cell of a compound, i.e., a mixed oxide of yttrium, barium and copper. The formula of mixed oxide is YaBabCucOd. Find the value of a+b+c+d. |
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| 3471. |
Which atom has higher electronegativity in the HCl molecule? |
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Answer» Which atom has higher electronegativity in the HCl molecule? |
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| 3472. |
The discomfort caused by indigestion due to overeating can be cured by taking : (a) vinegar (b) lemon juice (c) baking soda (d) caustic soda |
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Answer» The discomfort caused by indigestion due to overeating can be cured by taking : (a) vinegar (b) lemon juice (c) baking soda (d) caustic soda |
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| 3473. |
The amount of ammonia evolved from one gram of an organic compound in kjeldals estimation of Nitrogen,neutralized 20 ml of 1N sulfuric acid.The percentage of Nitrogen in the compound is-? |
| Answer» The amount of ammonia evolved from one gram of an organic compound in kjeldals estimation of Nitrogen,neutralized 20 ml of 1N sulfuric acid.The percentage of Nitrogen in the compound is-? | |
| 3474. |
0.250 g of an element M, reacts with excess fluorine to produce 0.547 g of the hexafluoride MF6. What is the element? [Cr = 52, Mo = 96, S = 32, Te = 127.6] |
| Answer» 0.250 g of an element M, reacts with excess fluorine to produce 0.547 g of the hexafluoride MF6. What is the element? [Cr = 52, Mo = 96, S = 32, Te = 127.6] | |
| 3475. |
How does elements achieve octet configuration: |
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Answer» How does elements achieve octet configuration: |
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| 3476. |
An iron nail was dropped into copper sulphate solution. After some time, the colour of the solution changed from :(1) light green to blue(2) blue to light green(3) light green to colourless(4) blue to yellow |
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Answer» An iron nail was dropped into copper sulphate solution. After some time, the colour of the solution changed from : (1) light green to blue (2) blue to light green (3) light green to colourless (4) blue to yellow |
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| 3477. |
Copy and complete the following table which refers to two practical applications of electrolysis. Anode Electrolyte Cathode Silver plating of a spoon Purification of copper Solution of potassium argentocyanide |
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Answer» Copy and complete the following table which refers to two practical applications of electrolysis.
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| 3478. |
We have three aqueous solutions of NaCl labelled as A, B and C with 0.1M, 0.01M and 0.001M respectively. The value of vant hoff factor for these solutions will be in order-a) iaib>icc) ia=ib=icd) iaic |
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Answer» We have three aqueous solutions of NaCl labelled as A, B and C with 0.1M, 0.01M and 0.001M respectively. The value of vant hoff factor for these solutions will be in order- a) ia c) ia=ib=ic d) ia |
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| 3479. |
The pH of 0.01 M aqueous solution of a salt of weak acid and strong base is (Ka of weak acidic = 10–4)is1)82)73)44)9 |
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Answer» The pH of 0.01 M aqueous solution of a salt of weak acid and strong base is (Ka of weak acidic = 10–4)is 1)8 2)7 3)4 4)9 |
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| 3480. |
What is the positive ion in sodium sulphate? |
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Answer» What is the positive ion in sodium sulphate? |
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| 3481. |
What happens when SO2 gas is passed through a potassium dichromate solution? |
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Answer» What happens when SO2 gas is passed through a potassium dichromate solution? |
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| 3482. |
Define functional groups and give two examples with the structural formula of the following: [5 MARKS] (i) ketone (ii) alcohols (iii) aldehydes. |
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Answer» Define functional groups and give two examples with the structural formula of the following: [5 MARKS] (i) ketone (ii) alcohols (iii) aldehydes. |
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| 3483. |
The elements which occupy the peaks of ionization energy curve are |
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Answer» The elements which occupy the peaks of ionization energy curve are
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| 3484. |
Which of the following acids has the highest boiling point? |
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Answer» Which of the following acids has the highest boiling point? |
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| 3485. |
Explain the following:(a) Covalent compounds are generally gases or liquids or soft solids.(b) Covalent compounds have low melting point and boiling point.(c) Non-polar covalent compounds are insoluble in water.(d) Polar covalent compounds are good conductors of electricity. |
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Answer» Explain the following: |
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| 3486. |
State the effect of adding a small amount of: (a) sodium hydroxide (b) ammonium hydroxide followed by an excess in each case to samples of each of the salt solutions.(i) calcium nitrate [small amount .......... in excess ..........].(ii) zinc nitrate [small amount ........... in excess ............].(iii) lead nitrate [small amount ........... in excess .........]. |
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Answer» State the effect of adding a small amount of: (a) sodium hydroxide (b) ammonium hydroxide followed by an excess in each case to samples of each of the salt solutions. (i) calcium nitrate [small amount .......... in excess ..........]. (ii) zinc nitrate [small amount ........... in excess ............]. (iii) lead nitrate [small amount ........... in excess .........]. |
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| 3487. |
Write balanced equation for the following:Ethane is burnt in air.(a) Write the equation for the preparation of ethylene from ethyl alcohol.(b) Write the general formula for a saturated hydrocarbon and give one example of a saturated hydrocarbon with its structural formula.(c) Name a compound which will give acetylene gas, when treated with water. |
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Answer» Write balanced equation for the following: Ethane is burnt in air. (a) Write the equation for the preparation of ethylene from ethyl alcohol. (b) Write the general formula for a saturated hydrocarbon and give one example of a saturated hydrocarbon with its structural formula. (c) Name a compound which will give acetylene gas, when treated with water. |
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| 3488. |
The graph of pH during the titration of NaOH and HCl |
| Answer» The graph of pH during the titration of NaOH and HCl | |
| 3489. |
Among alkali metals,__has the smallest atomic radius. |
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Answer» Among alkali metals, |
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| 3490. |
100 ml of 3 mol H2SO4 reacts with 100 ml of 3 mol NaOH. Enthalpy of neutralisation of reaction will be |
| Answer» 100 ml of 3 mol H2SO4 reacts with 100 ml of 3 mol NaOH. Enthalpy of neutralisation of reaction will be | |
| 3491. |
While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? |
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Answer» While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? |
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| 3492. |
Discolouration of 'Taj mahal' marbles is due to |
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Answer» Discolouration of 'Taj mahal' marbles is due to |
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| 3493. |
21. The ph of 0.1M NaHs is, if Ka1 and Ka2 for H2s are 1.3 * 10-7 and 7.1 * 10-15 respectively |
| Answer» 21. The ph of 0.1M NaHs is, if Ka1 and Ka2 for H2s are 1.3 * 10-7 and 7.1 * 10-15 respectively | |
| 3494. |
What is trivial solution and non-trivial solution? |
| Answer» What is trivial solution and non-trivial solution? | |
| 3495. |
how to find the number of shells and electrons in that particular shell of an atom? |
| Answer» how to find the number of shells and electrons in that particular shell of an atom? | |
| 3496. |
What chemical process is used for obtaining a metal from its oxide? |
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Answer» What chemical process is used for obtaining a metal from its oxide? |
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| 3497. |
(a) A solution has a pH of 7. Explain how you would : (i) increase ist pH; (ii) decrease its pH; (b) If a solution changes the colour of litmus from red to blue, what can you say about its pH? (c) What can you say about the pH of a solution, that liberates carbon dioxide from sodium carbonate ? |
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Answer» (a) A solution has a pH of 7. Explain how you would : (i) increase ist pH; (ii) decrease its pH; (b) If a solution changes the colour of litmus from red to blue, what can you say about its pH? (c) What can you say about the pH of a solution, that liberates carbon dioxide from sodium carbonate ? |
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| 3498. |
The energy required to remove an electron from an isolated gaseous atom is called __ energy. |
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Answer» The energy required to remove an electron from an isolated gaseous atom is called |
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| 3499. |
The equivalent conductivity of a solution containing 2.54g of CuSO4 per litre is 91.0 W-1 cm2 eq-1. Its conductivity would be |
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Answer» The equivalent conductivity of a solution containing 2.54g of CuSO4 per litre is 91.0 W-1 cm2 eq-1. Its conductivity would be |
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| 3500. |
31. The amount of water formed by reacting 32gram of hydrogen with 32 gram of oxygen is |
| Answer» 31. The amount of water formed by reacting 32gram of hydrogen with 32 gram of oxygen is | |