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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.
| 601. |
Water cannot be used as fire extinguisher to put out – |
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Answer» Water cannot be used as fire extinguisher to put out – |
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| 602. |
what is respiration and combustion? |
| Answer» what is respiration and combustion? | |
| 603. |
Filthy similar in meaning to : |
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Answer» Filthy similar in meaning to : |
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| 604. |
Why can't we use sea water for agricultural purposes? |
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Answer» Why can't we use sea water for agricultural purposes? |
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| 605. |
Q13. Which of the following are Refractory ceramics? 1. Tantalum carbide 2. Silver Copper Telluride (AgCuTe) 3. Sodium Nitrite 4. Hafnium carbide (HfC) Which of the statements are correct? |
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Answer» Q13. Which of the following are Refractory ceramics? 1. Tantalum carbide 2. Silver Copper Telluride (AgCuTe) 3. Sodium Nitrite 4. Hafnium carbide (HfC) Which of the statements are correct? |
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| 606. |
A ___________ is formed when two or more atoms bond chemically. |
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Answer» A ___________ is formed when two or more atoms bond chemically. |
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| 607. |
What are metalloid? |
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Answer» What are metalloid? |
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| 608. |
Why we are multiply and a factor with molar mass to get Equivalent weight the actual formula is molar mass upon acidity or disability or number of cations or valency. |
| Answer» Why we are multiply and a factor with molar mass to get Equivalent weight the actual formula is molar mass upon acidity or disability or number of cations or valency. | |
| 609. |
What is gram atomic mass? Give one example |
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Answer» What is gram atomic mass? Give one example |
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| 610. |
Find the ratio of the number of atoms present in 16 g of O_2 and 32 g of O_3. |
| Answer» Find the ratio of the number of atoms present in 16 g of O_2 and 32 g of O_3. | |
| 611. |
10. An ionic solid A*+and B*- crystallize as bcc structure the distance between cation and anion in the lattice is 338 pm calculate the edge length of the unit cell |
| Answer» 10. An ionic solid A*+and B*- crystallize as bcc structure the distance between cation and anion in the lattice is 338 pm calculate the edge length of the unit cell | |
| 612. |
What product will be formed when aluminium chloride reacts with calcium? |
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Answer» What product will be formed when aluminium chloride reacts with calcium? |
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| 613. |
What product obtained on burning fossil fuels can prevent oxygen from binding with haemoglobin? |
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Answer» What product obtained on burning fossil fuels can prevent oxygen from binding with haemoglobin? |
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| 614. |
A solution contains Fe2+, Fe3+ and I ions. This solution was treated with iodine at 35C. E for Fe3+/Fe2+ is +0.77 V and E for I2/2I = 0.536 V.The favorable redox reaction is:(1) I− will be oxidized to I2 (2) Fe2+ will be reduced to Fe3+ (3) I2 will be reduced to I− (4) there will be no redox reaction takes placePlease explain |
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Answer» A solution contains Fe2+, Fe3+ and I ions. This solution was treated with iodine at 35C. E for Fe3+/Fe2+ is +0.77 V and E for I2/2I = 0.536 V.The favorable redox reaction is: (1) I− will be oxidized to I2 Please explain |
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| 615. |
Question 16Fill in the blanks in the following sentences.(a) A ____________ process in which a substance reacts with __________ to give off heat is called combustion.(b) When the clothes of a person catch __________, the person is covered with a __________ to extinguish fire.(c) The __________ temperature at which a substance catches fire is called its ignition temperature.(d) The substances which have very ________________ ignition temperature and can easily catch fire with a flame are called __________ substances.(e) The substances which vapourise during __________, give flame. |
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Answer» Question 16 Fill in the blanks in the following sentences. (a) A ____________ process in which a substance reacts with __________ to give off heat is called combustion. (b) When the clothes of a person catch __________, the person is covered with a __________ to extinguish fire. (c) The __________ temperature at which a substance catches fire is called its ignition temperature. (d) The substances which have very ________________ ignition temperature and can easily catch fire with a flame are called __________ substances. (e) The substances which vapourise during __________, give flame. |
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| 616. |
10.Two particles A and B have same charge Q and different masses m and 2m respectively. They are released from rest with initial separation d between them. Assuming only mutual electrostatic forces act on them, the speed of B, when the separation between them becomes 2d, is |
| Answer» 10.Two particles A and B have same charge Q and different masses m and 2m respectively. They are released from rest with initial separation d between them. Assuming only mutual electrostatic forces act on them, the speed of B, when the separation between them becomes 2d, is | |
| 617. |
6. Why oxygen is support of combustion but not nitrogen |
| Answer» 6. Why oxygen is support of combustion but not nitrogen | |
| 618. |
Hydrogen chloride reacts with metals to form: |
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Answer» Hydrogen chloride reacts with metals to form: |
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| 619. |
The world is battling against rising Global temperature. In this regard, India has made a long stride by launching its own comprehensive cooling action plan. Explain the opportunities and challenges with respect to this programme. |
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Answer» The world is battling against rising Global temperature. In this regard, India has made a long stride by launching its own comprehensive cooling action plan. Explain the opportunities and challenges with respect to this programme. |
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| 620. |
Calculate volume of 80g oxygen.Q.40 |
| Answer» Calculate volume of 80g oxygen.Q.40 | |
| 621. |
Q.When mercuric iodide is added to the aqueous solution of KI then the 1. boiling point is raised 2. boiling point does not change 3. freezing point is lowered 4.freezing point is raised |
| Answer» Q.When mercuric iodide is added to the aqueous solution of KI then the 1. boiling point is raised 2. boiling point does not change 3. freezing point is lowered 4.freezing point is raised | |
| 622. |
How zinc protect iron object even if its surface gets broken ? |
| Answer» How zinc protect iron object even if its surface gets broken ? | |
| 623. |
Give one example of diffusion of gases in a liquid. |
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Answer» Give one example of diffusion of gases in a liquid. |
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| 624. |
Metal + Acid - |
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Answer» Metal + Acid - |
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| 625. |
Your class teacher gave you a project to make a beam balance, for one side she asked you to use nylon threads and for the other side steel threads of the same diameter of cross-section. And then she asked you to start placing weights on both of them, so which thread would survive till the end according to you observation? |
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Answer» Your class teacher gave you a project to make a beam balance, for one side she asked you to use nylon threads and for the other side steel threads of the same diameter of cross-section. And then she asked you to start placing weights on both of them, so which thread would survive till the end according to you observation? |
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| 626. |
Which one of the following has Frenkel defect?1. NaCl2. AgBr3. Graphite4. Diamond |
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Answer» Which one of the following has Frenkel defect? 1. NaCl 2. AgBr 3. Graphite 4. Diamond |
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| 627. |
Is salt considered a metal or a non metal? |
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Answer» Is salt considered a metal or a non metal? |
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| 628. |
Write the names of the following compounds and deduce their molecular masses. Na2 SO4 , K2 CO3 , CO2 , MgCl2 , NaOH, AlPO4 , NaHCO3 |
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Answer» Write the names of the following compounds and deduce their molecular masses. Na2 SO4 , K2 CO3 , CO2 , MgCl2 , NaOH, AlPO4 , NaHCO3 |
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| 629. |
35. Maximum electron in 3 shell having ml=2 |
| Answer» 35. Maximum electron in 3 shell having ml=2 | |
| 630. |
what are sub-shells? |
| Answer» what are sub-shells? | |
| 631. |
Q 13/30 How many times do the electron go round thesecond Bohr orbit in a second? |
| Answer» Q 13/30 How many times do the electron go round thesecond Bohr orbit in a second? | |
| 632. |
Which of the following are obtained by destructive distillation of coal? |
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Answer» Which of the following are obtained by destructive distillation of coal? |
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| 633. |
Which of the following is correctly matched? |
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Answer» Which of the following is correctly matched? |
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| 634. |
Calcination is defined as: |
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Answer» Calcination is defined as: |
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| 635. |
Question 2 What is an unbalanced chemical equation? Write down the symbols of various physical states of substances. |
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Answer» Question 2
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| 636. |
If a mole were to contain 1 x 10^24 particles, what would be the mass ofi) One mole of Oxygen?ii) A single oxygen molecule? |
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Answer» If a mole were to contain 1 x 10^24 particles, what would be the mass of i) One mole of Oxygen? ii) A single oxygen molecule? |
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| 637. |
Which metal is used in thermometers? |
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Answer» Which metal is used in thermometers? |
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| 638. |
name the gas involved when metals react with water |
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Answer» name the gas involved when metals react with water |
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| 639. |
Why ignition temperature is different for different materials? |
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Answer» Why ignition temperature is different for different materials? |
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| 640. |
1. Is the Heat released in rotating a dipole positive or negative? |
| Answer» 1. Is the Heat released in rotating a dipole positive or negative? | |
| 641. |
Question 6On placing an inverted tumbler over a burning candle, the flame extinguishes after some time. This is because of non availability of(a) Oxygen(b) Water vapours(c) Carbon dioxide(d) Was covered with tumbler |
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Answer» Question 6 On placing an inverted tumbler over a burning candle, the flame extinguishes after some time. This is because of non availability of (a) Oxygen (b) Water vapours (c) Carbon dioxide (d) Was covered with tumbler |
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| 642. |
Why can only electrons move and get transferred? Why not protons? |
| Answer» Why can only electrons move and get transferred? Why not protons? | |
| 643. |
Question 9 (a) What happens when Dilute sulphuric acid is poured on a copper plate? Write word equations of the reactions involved. |
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Answer» Question 9 (a) What happens when Dilute sulphuric acid is poured on a copper plate? Write word equations of the reactions involved. |
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| 644. |
You add sugar to 50 mL of hot tea and to 50 mL of iced tea. Which cup would have a higher concentration at the room temperature? |
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Answer» You add sugar to 50 mL of hot tea and to 50 mL of iced tea. Which cup would have a higher concentration at the room temperature? |
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| 645. |
3. Why Boron (B) not reacts with any dil. acid like dil. HCl , dil. H2SO4 , dil. HNO3 whereas. B reacts with Conc. HNO3 and Conc. H2SO4 ?? |
| Answer» 3. Why Boron (B) not reacts with any dil. acid like dil. HCl , dil. H2SO4 , dil. HNO3 whereas. B reacts with Conc. HNO3 and Conc. H2SO4 ?? | |
| 646. |
500ml of 0.1M AlCl3 is mixed with 500 ml of 0.1M MgCl2 solution. Then calculate the molarity of Cl- in final solution |
| Answer» 500ml of 0.1M AlCl3 is mixed with 500 ml of 0.1M MgCl2 solution. Then calculate the molarity of Cl- in final solution | |
| 647. |
Molecular mass of polymer is |
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Answer» Molecular mass of polymer is |
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| 648. |
7. What is used to dry ammonia? |
| Answer» 7. What is used to dry ammonia? | |
| 649. |
Question 10Give reasons:(i) Electric boards fitted on the wall made of plastic or wood.(ii) The handle of the cooker is made of plastic. |
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Answer» Question 10 Give reasons: (i) Electric boards fitted on the wall made of plastic or wood. (ii) The handle of the cooker is made of plastic. |
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| 650. |
What observation can be made when calcium reacts with H2O? |
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Answer» What observation can be made when calcium reacts with H2O? |
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