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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.
| 8001. |
Energy of electron in 3rd bohr orbit of He+ is (a)-2/3 Rhhc (b)-9/4Rhhc (c)-6/4Rhhc (d)-4/4Rhhc |
| Answer» Energy of electron in 3rd bohr orbit of He+ is (a)-2/3 Rhhc (b)-9/4Rhhc (c)-6/4Rhhc (d)-4/4Rhhc | |
| 8002. |
40.Which one of the following statements is incorrect about rock salt type ?(A)It has fcc arrangement of Na+. (B)Na+ and CL- ions have a co-ordination number of 6:6 .(C) A unit cell of NaCl consists of four NaCl units. (D) All halides of alkali metals have rock salt type structure. |
| Answer» 40.Which one of the following statements is incorrect about rock salt type ?(A)It has fcc arrangement of Na+. (B)Na+ and CL- ions have a co-ordination number of 6:6 .(C) A unit cell of NaCl consists of four NaCl units. (D) All halides of alkali metals have rock salt type structure. | |
| 8003. |
Adsorption property is applied in()sewage disposal(4) medicine(3) smoke precipitator(2) ultramicroscope |
| Answer» Adsorption property is applied in()sewage disposal(4) medicine(3) smoke precipitator(2) ultramicroscope | |
| 8004. |
The molecular velocities of two gases at the sametemperature are u1 and u2 and their molar massesare m1 and m2 respectively. Which of the followingexpressions are correct? -m1/u1^2=m2/u2^2 -m1u1=m2u2 -m1/u1=m2/u2 m1u1^2=m2u2^{ |
| Answer» The molecular velocities of two gases at the sametemperature are u1 and u2 and their molar massesare m1 and m2 respectively. Which of the followingexpressions are correct? -m1/u1^2=m2/u2^2 -m1u1=m2u2 -m1/u1=m2/u2 m1u1^2=m2u2^{ | |
| 8005. |
24. During formation of ionic compound, how and why energy loses(lattice energy) |
| Answer» 24. During formation of ionic compound, how and why energy loses(lattice energy) | |
| 8006. |
Give four examples for preparation of acids by synthesis. |
| Answer» Give four examples for preparation of acids by synthesis. | |
| 8007. |
Question 12(a) A milkman adds a very small amount of baking soda to fresh milk. (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline? |
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Answer» Question 12(a) A milkman adds a very small amount of baking soda to fresh milk. (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline? |
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| 8008. |
What equal charges would to be placed on earth and moon to neutralise their gravitational attraction (use mass of earth 105 kg and mass of moon is 10 |
| Answer» What equal charges would to be placed on earth and moon to neutralise their gravitational attraction (use mass of earth 105 kg and mass of moon is 10 | |
| 8009. |
Answer in Brief:Do you think that use of ‘kullad’ (clay cup) in railways for providing tea and coffee is a way of sustainable use of resources? How? |
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Answer» Answer in Brief: Do you think that use of ‘kullad’ (clay cup) in railways for providing tea and coffee is a way of sustainable use of resources? How? |
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| 8010. |
What is the green color coating that forms on copper when it is left open? |
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Answer» What is the green color coating that forms on copper when it is left open? |
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| 8011. |
If a set has 2 elements then the difference between the subsets of its powers set and number of its subset is ?? |
| Answer» If a set has 2 elements then the difference between the subsets of its powers set and number of its subset is ?? | |
| 8012. |
Complete and balance the equation: CuO (heated) + NH3 → |
| Answer» Complete and balance the equation: CuO (heated) + NH3 | |
| 8013. |
How many isomers of the following hydrocarbons are possible?(a) C3H8(b) C4H10 |
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Answer» How many isomers of the following hydrocarbons are possible? (a) C3H8 (b) C4H10 |
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| 8014. |
What is the pH of 0.01 M glycine solution?For glycine K_{a_{1_{}}}=4.5\ast10^{-3} and K_{a_2}=1.7\ast10^{-10} at 298K? |
| Answer» What is the pH of 0.01 M glycine solution?For glycine K_{a_{1_{}}}=4.5\ast10^{-3} and K_{a_2}=1.7\ast10^{-10} at 298K? | |
| 8015. |
The number of moles of NH3 in 4.25 grams of NH3 is. |
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Answer» The number of moles of NH3 in 4.25 grams of NH3 is |
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| 8016. |
23. Nitrogen gas is filled in an insulated container. If A fraction of moles dissociates with out exchange of any energy , then what is the fractional change in its temperature?? |
| Answer» 23. Nitrogen gas is filled in an insulated container. If A fraction of moles dissociates with out exchange of any energy , then what is the fractional change in its temperature?? | |
| 8017. |
Which of the following acid will form an(a) Anhydride on heating and(b) Acid imide on strong heating with ammonia? |
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Answer» Which of the following acid will form an |
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| 8018. |
Write balanced equations for the following reactions: Copper oxide and dilute hydrochloric acid |
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Answer» Write balanced equations for the following reactions: Copper oxide and dilute hydrochloric acid |
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| 8019. |
What is the Electronic Configuration of the He+ Ion. |
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Answer» What is the Electronic Configuration of the He+ Ion . |
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| 8020. |
Which of these will conduct electricity- tap water or distilled water? Why? |
| Answer» Which of these will conduct electricity- tap water or distilled water? Why? | |
| 8021. |
which allotrope of carbon : diamond & graphite have more internal energy, bond length, bond energy and stability? Explain with proper reasons |
| Answer» which allotrope of carbon : diamond & graphite have more internal energy, bond length, bond energy and stability? Explain with proper reasons | |
| 8022. |
Which element will have maximum metallic character,? |
| Answer» Which element will have maximum metallic character,? | |
| 8023. |
The molecular mass of sulphuric acid is ___ g/mol. |
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Answer» The molecular mass of sulphuric acid is |
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| 8024. |
A covalent molecule having a double bond between its atoms is: (a) Hydrogen (b) Oxygen (c) Water (d) ammonia |
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Answer» A covalent molecule having a double bond between its atoms is: |
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| 8025. |
What is meant by the following terms:(a) Aqua fortis(b) Aqua regia(c) Fuming nitric acid(d) Decrepitation |
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Answer» What is meant by the following terms: (a) Aqua fortis (b) Aqua regia (c) Fuming nitric acid (d) Decrepitation |
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| 8026. |
Anhydrous hydrogen chloride is not an acid but its aqueous solution is a strong acid. Explain. |
| Answer» Anhydrous hydrogen chloride is not an acid but its aqueous solution is a strong acid. Explain. | |
| 8027. |
Calculate the volume of water to be added to 500 mL of a 2 N solution to obtain a 0.1 N resultant solution. |
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Answer» Calculate the volume of water to be added to 500 mL of a 2 N solution to obtain a 0.1 N resultant solution. |
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| 8028. |
Write the balanced equation for the laboratory preparation of nitric acid from potassium nitrate. |
| Answer» Write the balanced equation for the laboratory preparation of nitric acid from potassium nitrate. | |
| 8029. |
Match the following Process Media used A. EDM 1. Electrolye B. ECM 2. Dielectric C. USM 3. Abrasive slurry D. EBM 4. Vacuum |
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Answer» Match the following
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| 8030. |
What do you mean by the Free State? |
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Answer» What do you mean by the Free State? |
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| 8031. |
on adding 1mL solution10%NaCl to 10mL gold sol in presence of 0.25 gm strach so that coagulation is just prevented what will be gold number of strach ?? |
| Answer» on adding 1mL solution10%NaCl to 10mL gold sol in presence of 0.25 gm strach so that coagulation is just prevented what will be gold number of strach ?? | |
| 8032. |
Correct orders of \(I^{st}\) I.P. are - (i) Li < B < Be < C (ii) O < N < F (iii) Be < N < Ne |
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Answer» Correct orders of \(I^{st}\) I.P. are - (i) Li < B < Be < C (ii) O < N < F (iii) Be < N < Ne |
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| 8033. |
How will you bring about following conversions:(a) Methane to methanol.(b) Ethane to ethanol (acetaldehyde).(c) Methane to methanoic acid. |
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Answer» How will you bring about following conversions: (a) Methane to methanol. (b) Ethane to ethanol (acetaldehyde). (c) Methane to methanoic acid. |
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| 8034. |
81.In a constant volume calorimeter, 5g of a gas with molecular weight 40 was burnt in excess of oxygen at 298K . the temperature of the calorimeter was found to increase from 298K to 298.75K due to combustion process.given that the heat capacity of the calorimeter is2.5kJ /K,the numerical value for the Δ U of combustion of the gas in kJ/mol is 1) 15 2) 12 3) 90 4) 8 |
| Answer» 81.In a constant volume calorimeter, 5g of a gas with molecular weight 40 was burnt in excess of oxygen at 298K . the temperature of the calorimeter was found to increase from 298K to 298.75K due to combustion process.given that the heat capacity of the calorimeter is2.5kJ /K,the numerical value for the Δ U of combustion of the gas in kJ/mol is 1) 15 2) 12 3) 90 4) 8 | |
| 8035. |
Identify the balanced chemical reaction of sodium with ethanol. |
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Answer» Identify the balanced chemical reaction of sodium with ethanol. |
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| 8036. |
Which of the following contains acidic hydrogen? |
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Answer» Which of the following contains acidic hydrogen? |
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| 8037. |
67.Why is atom stable most if it contains eight electrons in its valency shell? |
| Answer» 67.Why is atom stable most if it contains eight electrons in its valency shell? | |
| 8038. |
Which of the following expression at constant pressure represents Charle's law? |
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Answer» Which of the following expression at constant pressure represents Charle's law? |
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| 8039. |
Suggest the IUPAC name for the given compound: |
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Answer» Suggest the IUPAC name for the given compound:
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| 8040. |
How to take out valency from a given electronic configuration of element ? |
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Answer» How to take out valency from a given electronic configuration of element ? |
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| 8041. |
What is meant by “water of crystallisation” in a substance ? Explain with an example |
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Answer» What is meant by “water of crystallisation” in a substance ? Explain with an example |
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| 8042. |
Pick up the statements which are related with carbon:1. 14th group element 2. In the human body, it is second most abundant element by mass after oxygen3. Non-metallic4. 15th group element5. One of the few elements known since antiquity.6. Only 4 electrons are available for bonding.7. Only 3 electrons are available for bonding.8. Metallic |
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Answer» Pick up the statements which are related with carbon: 1. 14th group element 2. In the human body, it is second most abundant element by mass after oxygen 3. Non-metallic 4. 15th group element 5. One of the few elements known since antiquity. 6. Only 4 electrons are available for bonding. 7. Only 3 electrons are available for bonding. 8. Metallic
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| 8043. |
[Ti(H2O)6]3+ absorbs light of wavelength 498 nm during a d–d transition. The octahedral splitting energy for the above complex is ×10−19 J. (Round off to the nearest integer). h=6.626×10−34 J s; c = 3 \times 10^8~\text{ m s}^{-1}\). |
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Answer» [Ti(H2O)6]3+ absorbs light of wavelength 498 nm during a d–d transition. The octahedral splitting energy for the above complex is |
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| 8044. |
Explain extraction of Aluminium from bauxite in detail wth reactions |
| Answer» Explain extraction of Aluminium from bauxite in detail wth reactions | |
| 8045. |
The crystalline salt Na2SO4.xH2O on heating loses 55.9% of it's mass and becomes anhydrous . The formula of crystalline salt is |
| Answer» The crystalline salt Na2SO4.xH2O on heating loses 55.9% of it's mass and becomes anhydrous . The formula of crystalline salt is | |
| 8046. |
in a unit cell atoms A ,B, C and D are present at corners , face centres , body centres and edge centres respectively.If atoms touching one of the plane passing through two diagonally opposite edges are removed , then what will be the formula of compound? |
| Answer» in a unit cell atoms A ,B, C and D are present at corners , face centres , body centres and edge centres respectively.If atoms touching one of the plane passing through two diagonally opposite edges are removed , then what will be the formula of compound? | |
| 8047. |
Which one of the following does not increase while moving down the group of the periodic table? (a) atomic radius (b) metallic character (c) valence electrons (d) shells in the atoms |
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Answer» Which one of the following does not increase while moving down the group of the periodic table? (a) atomic radius (b) metallic character (c) valence electrons (d) shells in the atoms |
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| 8048. |
In an experiment 20 ml of a decinormal HCl solution was added to 10 ml ,decinormal AgNO3 solution.AgCl was precipitated out and excess of acid was back titrated against a decinormal NaOh solution . What volume of NaOH was required for this backtitration |
| Answer» In an experiment 20 ml of a decinormal HCl solution was added to 10 ml ,decinormal AgNO3 solution.AgCl was precipitated out and excess of acid was back titrated against a decinormal NaOh solution . What volume of NaOH was required for this backtitration | |
| 8049. |
As temperature of water is increased its density is? |
| Answer» As temperature of water is increased its density is? | |
| 8050. |
ntIf total 110 elements are present in periodic table then how many of them contain e- in f subshelln nt1. 28n nt2. 57n nt3. 58n nt4. 53n |
| Answer» ntIf total 110 elements are present in periodic table then how many of them contain e- in f subshelln nt1. 28n nt2. 57n nt3. 58n nt4. 53n | |
