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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.
| 6451. |
Which of the following is an example of a metal oxide? |
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Answer» Which of the following is an example of a metal oxide? |
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| 6452. |
(A) and (B) is differentiated by : |
Answer»   (A) and (B) is differentiated by : |
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| 6453. |
Which of the following atomic species has maximum ionization energy?O-S-Se- |
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Answer» Which of the following atomic species has maximum ionization energy? O- S- Se- |
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| 6454. |
An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess? |
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Answer» An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess? |
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| 6455. |
Is the product formed on burning the magnesium acidic or basic? Explain this |
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Answer» Is the product formed on burning the magnesium acidic or basic? Explain this |
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| 6456. |
Metals react with water to give out metal oxide and hydrogen but everywhere in books it is given as;K + H2O=KOH + H2 But according to first statement it should actually be ;K+H2O=K2O + H2 Then which is true and why? |
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Answer» Metals react with water to give out metal oxide and hydrogen but everywhere in books it is given as;K + H2O=KOH + H2 But according to first statement it should actually be ;K+H2O=K2O + H2 Then which is true and why? |
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| 6457. |
When a student put some copper turnings in a colourless solution, he observed that the solution gradually turned blue. The solution is most likely to be :(1) ferrous sulphate solution(2) magnesium nitrate solution(3) silver nitrate solution(4) copper sulphate solution |
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Answer» When a student put some copper turnings in a colourless solution, he observed that the solution gradually turned blue. The solution is most likely to be : (1) ferrous sulphate solution (2) magnesium nitrate solution (3) silver nitrate solution (4) copper sulphate solution |
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| 6458. |
38. Pka of weak acid is 8. Find pH if concentration is 0.01 M ?? |
| Answer» 38. Pka of weak acid is 8. Find pH if concentration is 0.01 M ?? | |
| 6459. |
What do you understand by mole? If, 8.4 g X element includes 9.03×1022 atoms and 0.1 mol X2Y3 compound is 16 g, find atomic mass of Y element. (Avogadro number is 6.02×1023) |
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Answer» What do you understand by mole? If, 8.4 g X element includes 9.03×1022 atoms and 0.1 mol X2Y3 compound is 16 g, find atomic mass of Y element. (Avogadro number is 6.02×1023) |
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| 6460. |
For the reaction CaCO3 (s)------------ ------------> CaO (s) + CO2 (g), kp is equal to in terms of Kc? |
| Answer» For the reaction CaCO3 (s)------------ ------------> CaO (s) + CO2 (g), kp is equal to in terms of Kc? | |
| 6461. |
27.6 g K_2CO_3 was treated by a series of reagents so as to convert all of its carbon to K_2Zn_3\lbrack Fe(CN)_6\rbrack_{2.} The weight of product is (1) 22.3 g (2) 11.6 g (3) 50.3 g (4) 112 g |
| Answer» 27.6 g K_2CO_3 was treated by a series of reagents so as to convert all of its carbon to K_2Zn_3\lbrack Fe(CN)_6\rbrack_{2.} The weight of product is (1) 22.3 g (2) 11.6 g (3) 50.3 g (4) 112 g | |
| 6462. |
An element has an atomic number 16. State the period to which it belongs. |
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Answer» An element has an atomic number 16. State the period to which it belongs. |
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| 6463. |
Write the atomic number and electronic configuration of the following elements.(i) Sodium(ii) Chlorine(iii) Neon(iv) Magnesium |
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Answer» Write the atomic number and electronic configuration of the following elements. (i) Sodium (ii) Chlorine (iii) Neon (iv) Magnesium |
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| 6464. |
A sphere of lead of mass 10 g has net charge -2.5 x 10-9 O(a) Find the number of excess electrons on the sphere.b)e7:How many excess electrons are per lead atom? Atomic number of lead is 82 and its atomicmass is 207 g/mol. |
| Answer» A sphere of lead of mass 10 g has net charge -2.5 x 10-9 O(a) Find the number of excess electrons on the sphere.b)e7:How many excess electrons are per lead atom? Atomic number of lead is 82 and its atomicmass is 207 g/mol. | |
| 6465. |
Why any atom of an element is divided by 1/12th of carbon atom to find out the atomic mass of that same element |
| Answer» Why any atom of an element is divided by 1/12th of carbon atom to find out the atomic mass of that same element | |
| 6466. |
How many covalent bonds are present in N2 molecule? |
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Answer» How many covalent bonds are present in N2 molecule? |
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| 6467. |
what are the functions of salt bridge ? |
| Answer» what are the functions of salt bridge ? | |
| 6468. |
(a) What happens when propanoic acid is warmed with methanol in the presence of a few drops of concentrated sulphuric acid? Write the equation of the reaction involved. (b) What change will you observe if you test soap solution with a litmus paper (red and blue) ? Give the reason for your observation. (c) What is meant by denatured alcohol? What is the need to denature alcohol? |
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Answer» (a) What happens when propanoic acid is warmed with methanol in the presence of a few drops of concentrated sulphuric acid? Write the equation of the reaction involved. |
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| 6469. |
The chemical formula of bauxite ore is ______. |
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Answer» The chemical formula of bauxite ore is ______. |
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| 6470. |
The end product (Z) in the given sequence of reaction isCH3CH2CH2CHONaBH4−−−−→XPCl5−−−→Y(i)KCN−−−−−→(ii)H+Z |
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Answer» The end product (Z) in the given sequence of reaction is |
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| 6471. |
State whether the ionization potential increases or decreases on going down a group. |
| Answer» State whether the ionization potential increases or decreases on going down a group. | |
| 6472. |
What is the mechanism of addition of base in acetaldehyde and generation of carbanion and a proton? |
| Answer» What is the mechanism of addition of base in acetaldehyde and generation of carbanion and a proton? | |
| 6473. |
Give the reaction involved during extraction of zinc from its ore by:(a) roasting of zinc ore.(b) calcination of zinc ore. |
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Answer» Give the reaction involved during extraction of zinc from its ore by: (a) roasting of zinc ore. (b) calcination of zinc ore. |
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| 6474. |
A solution of 1 molal concentration of a solute will have maximum boiling point elevation when the solvent is A)Ethyl alcohol B)Acetone C)Benzene D)Chlorofor |
| Answer» A solution of 1 molal concentration of a solute will have maximum boiling point elevation when the solvent is A)Ethyl alcohol B)Acetone C)Benzene D)Chlorofor | |
| 6475. |
In a ccp structure of compound X,Y. X atom is present in octahedral voids.Calculate nearest neighbours upto 6th CN for X atom at body centre? |
| Answer» In a ccp structure of compound X,Y. X atom is present in octahedral voids.Calculate nearest neighbours upto 6th CN for X atom at body centre? | |
| 6476. |
How would you convert:(a) ethene into 1, 2-dibromoethane.(b) ethene to bromoethane? |
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Answer» How would you convert: (a) ethene into 1, 2-dibromoethane. (b) ethene to bromoethane? |
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| 6477. |
Mn+2+PbO2 +conc. HNO3 ----------->pink colour Pink colour is due to A)HMnO4 B)PB(NO3)2 C)Mn(NO3)2 D)H2MnO4 |
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Answer» Mn+2+PbO2 +conc. HNO3 ----------->pink colour Pink colour is due to A)HMnO4 B)PB(NO3)2 C)Mn(NO3)2 D)H2MnO4 |
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| 6478. |
How is the concentration of hydronium Ion affected when the solution of an acid is diluted? Explain with the help of reaction. |
| Answer» How is the concentration of hydronium Ion affected when the solution of an acid is diluted? Explain with the help of reaction. | |
| 6479. |
On analysis it was found that the black oxide of copper and red oxide of copper contain 80%and 89%of copper repectively. show that this data is in accordance with law of multiple proportions. |
| Answer» On analysis it was found that the black oxide of copper and red oxide of copper contain 80%and 89%of copper repectively. show that this data is in accordance with law of multiple proportions. | |
| 6480. |
Write the structural formulae of isomers of butane. |
| Answer» Write the structural formulae of isomers of butane. | |
| 6481. |
Question 6CH3−CH2−OHAlkaline KMnO4+Heat−−−−−−−−−−−−−−→CH3−COOHIn the above-given reaction, alkaline KMnO4 acts as(a) reducing agent(b) oxidising agent(c) catalyst(d) dehydrating agent |
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Answer» Question 6 CH3−CH2−OHAlkaline KMnO4+Heat−−−−−−−−−−−−−−→CH3−COOH In the above-given reaction, alkaline KMnO4 acts as (a) reducing agent (b) oxidising agent (c) catalyst (d) dehydrating agent |
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| 6482. |
Which is more reactive manganese or aluminium? |
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Answer» Which is more reactive manganese or aluminium? |
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| 6483. |
A compound (A) is used in preparation of washing soda to recover ammonia in Solvay's process. When CO2 is bubbled through an aqueous solution of (A), the solution turns milky. It is used in white washing due to disinfectent nature. What is the chemical formula of A ? |
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Answer» A compound (A) is used in preparation of washing soda to recover ammonia in Solvay's process. When CO2 is bubbled through an aqueous solution of (A), the solution turns milky. It is used in white washing due to disinfectent nature. What is the chemical formula of A ? |
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| 6484. |
How many gm of solid NaOH must be added to 100ml of a buffer solution which is 0.1 M each with respect to Acid HA and salt Na+ A- to make the PH of solution 5.5.given Pka =5 |
| Answer» How many gm of solid NaOH must be added to 100ml of a buffer solution which is 0.1 M each with respect to Acid HA and salt Na+ A- to make the PH of solution 5.5.given Pka =5 | |
| 6485. |
Write scientific reasons.A. The stainless steel vessels in Kitchen have copper coating on the bottom. B. Copper and brass vessels are cleaned with lemon.C. Sodium metal is kept in kerosene. |
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Answer» Write scientific reasons. A. The stainless steel vessels in Kitchen have copper coating on the bottom. B. Copper and brass vessels are cleaned with lemon. C. Sodium metal is kept in kerosene. |
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| 6486. |
___ method is generally used for the concentration of sulphide ores? |
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Answer» |
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| 6487. |
Write an equation for the reactions of hydrochloric acid on (a) silver nitrate solution, (b) magnesium foil, (c) caustic soda solution, (d) zinc carbonate, (e) manganese (IV) oxide, (f) copper oxide. |
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Answer» Write an equation for the reactions of hydrochloric acid on |
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| 6488. |
Chemical differences between acids and bases? |
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Answer» Chemical differences between acids and bases? |
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| 6489. |
how does the reactivity series of metals help in predicting the relative activities of various metals |
| Answer» how does the reactivity series of metals help in predicting the relative activities of various metals | |
| 6490. |
Explain the preparation of salt . |
| Answer» Explain the preparation of salt . | |
| 6491. |
"Mixing an acid or base with water results in decrease in the concentration of ions(H3O/OH-) per unit volume" Acid when mixed with water gives out H+ ions which because they cannot exist alone form H3O ions. Then how does the concentration 'decrease' ? |
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Answer» "Mixing an acid or base with water results in decrease in the concentration of ions(H3O/OH-) per unit volume" Acid when mixed with water gives out H+ ions which because they cannot exist alone form H3O ions. Then how does the concentration 'decrease' ? |
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| 6492. |
What is oxidising agent and reducing agent explain with examples . Please explain me so that I can solve any question regarding it |
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Answer» What is oxidising agent and reducing agent explain with examples . Please explain me so that I can solve any question regarding it |
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| 6493. |
The molecular mass of ethanoic acid is: |
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Answer» The molecular mass of ethanoic acid is: |
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| 6494. |
What are addition reactions? Why ethene undergo addition reactions? Give two examples. |
| Answer» What are addition reactions? Why ethene undergo addition reactions? Give two examples. | |
| 6495. |
Why do carbon form chains? And why carbon compounds are called organic compounds? |
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Answer» Why do carbon form chains? And why carbon compounds are called organic compounds? |
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| 6496. |
How the sodium metal is extracted from its salt NACL to extract the sodium from its ore on which solvent does AIDS salt will be dissolved because if it gets extracted in water and when it will be extracted then the sodium metal reacts vigorously with that water and we cannot get that sodium metal is the salt of sodium soluble in kerosene oil? |
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Answer» How the sodium metal is extracted from its salt NACL to extract the sodium from its ore on which solvent does AIDS salt will be dissolved because if it gets extracted in water and when it will be extracted then the sodium metal reacts vigorously with that water and we cannot get that sodium metal is the salt of sodium soluble in kerosene oil? |
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| 6497. |
Why calcium in nature found in their oxides or other constituents |
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Answer» Why calcium in nature found in their oxides or other constituents |
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| 6498. |
Why is tincture of iodine applied on wounds? |
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Answer» Why is tincture of iodine applied on wounds? |
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| 6499. |
Total number of values possible for spin quantum number is |
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Answer» Total number of values possible for spin quantum number is |
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| 6500. |
Each molecule of a tear gas, lewsite, contains 2 hydrogen atoms, 1.78×10^{-22}gm chlorine, 2 carbon atoms and 1.25×10^{-22}gm of an unknown metal. Its molecular weight will be (1) 178 (2) 208 (3) 245 (4) 342 |
| Answer» Each molecule of a tear gas, lewsite, contains 2 hydrogen atoms, 1.78×10^{-22}gm chlorine, 2 carbon atoms and 1.25×10^{-22}gm of an unknown metal. Its molecular weight will be (1) 178 (2) 208 (3) 245 (4) 342 | |