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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. |
Why is nitric acid not used in the preparation of hydrogen ? |
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Answer» Why is nitric acid not used in the preparation of hydrogen ? |
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| 6452. |
What is the difference between homogeneous mixture and solution? If there is no difference then why are two different terms being used. |
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Answer» What is the difference between homogeneous mixture and solution? If there is no difference then why are two different terms being used. |
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| 6453. |
Formula for stannic phosphate |
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Answer» Formula for stannic phosphate |
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| 6454. |
In the lab preparation of hydrogen gas, what would happen(write chemical equation ) if the following changes are made. A) in place of zinc granules,same amount of zinc dust is taken in the test tube b) instead of dilute sulphuric acid,HCL acid is taken c)sodium hydroxide is taken in place of sulphuric acid and the tube is heated d)in place of zinc,copper turnings are taken |
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Answer» In the lab preparation of hydrogen gas, what would happen(write chemical equation ) if the following changes are made. A) in place of zinc granules,same amount of zinc dust is taken in the test tube b) instead of dilute sulphuric acid,HCL acid is taken c)sodium hydroxide is taken in place of sulphuric acid and the tube is heated d)in place of zinc,copper turnings are taken |
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| 6455. |
Which of the following statements is correct? |
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Answer» Which of the following statements is correct? |
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| 6456. |
Which is the correct formula for nitrogen (1) oxide? |
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Answer» Which is the correct formula for nitrogen (1) oxide? |
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| 6457. |
Name any 3 substance that show sublimation |
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Answer» Name any 3 substance that show sublimation |
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| 6458. |
a=bq +r by using that formula put r=5 solve it |
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Answer» a=bq +r by using that formula put r=5 solve it |
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| 6459. |
Which particle is smallest in size? |
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Answer» Which particle is smallest in size? |
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| 6460. |
Define one mole , Avogadro number and gram atomic mass |
| Answer» Define one mole , Avogadro number and gram atomic mass | |
| 6461. |
What are non-aqueous solutions? Explain with example. |
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Answer» What are non-aqueous solutions? Explain with example. |
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| 6462. |
How we can identify heterogeneous and heterogeneous mixture? |
| Answer» How we can identify heterogeneous and heterogeneous mixture? | |
| 6463. |
Define absolute zero and absolute tscale of temperature. Write the relationship between ∘C and K. |
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Answer» Define absolute zero and absolute tscale of temperature. |
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| 6464. |
What is meant by saying that non-metals are brittle? |
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Answer» What is meant by saying that non-metals are brittle? |
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| 6465. |
An element X has a valency of 2. Write the simplest formula for: (a) Bromide of the element (b) Oxide of the element |
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Answer» An element X has a valency of 2. Write the simplest formula for: (a) Bromide of the element (b) Oxide of the element |
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| 6466. |
Question 54 Justify “Dust is a pollutant”? |
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Answer» Question 54 Justify “Dust is a pollutant”? |
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| 6467. |
Foam accumulates on a the surface of dal kept for a long time in summer. Why? |
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Answer» Foam accumulates on a the surface of dal kept for a long time in summer. Why? |
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| 6468. |
Is it possible that an object of any state of matter does not change its state of matter no matter how much we heat, freeze or apply pressure on it? |
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Answer» Is it possible that an object of any state of matter does not change its state of matter no matter how much we heat, freeze or apply pressure on it? |
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| 6469. |
How is the valency of manganese +2 and not -1? |
| Answer» How is the valency of manganese +2 and not -1? | |
| 6470. |
Iron and sulphur can form: |
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Answer» Iron and sulphur can form: |
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| 6471. |
Discuss an experiment which exhibits that a colloidal sol shows the phenomenon of tyndall effect while a true solution does not. |
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Answer» Discuss an experiment which exhibits that a colloidal sol shows the phenomenon of tyndall effect while a true solution does not. |
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| 6472. |
The number of electrons in the atom of an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of an atom of this element? |
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Answer» The number of electrons in the atom of an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of an atom of this element? |
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| 6473. |
Differentiate between Dalton and berzelius method of allocating symbols of the elements. |
| Answer» Differentiate between Dalton and berzelius method of allocating symbols of the elements. | |
| 6474. |
Mass Number is slightly less than the actual atomic mass |
| Answer» Mass Number is slightly less than the actual atomic mass | |
| 6475. |
The 'iodine value'of an oil indicates |
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Answer» The 'iodine value'of an oil indicates |
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| 6476. |
Air is Homogeneous or Hetrogeneous? Explain in detail |
| Answer» Air is Homogeneous or Hetrogeneous? Explain in detail | |
| 6477. |
In the cathode ray tube experiment was that a complete vacuum made in the tube if so then how did the reaction for the continue |
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Answer» In the cathode ray tube experiment was that a complete vacuum made in the tube if so then how did the reaction for the continue |
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| 6478. |
A compound is a _______ substance made up of _______ . |
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Answer» A compound is a _______ substance made up of _______ . |
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| 6479. |
A salad is an example of a _ mixture with composition. Which row completes the given statement? |
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Answer» A salad is an example of a _ mixture with composition. Which row completes the given statement? |
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| 6480. |
At fixed temperature and 600 mm pressure, the density of a gas is 42 gm/mm^(3). At the same temperature and 700 mm pressure, what is the density of the gas? |
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Answer» At fixed temperature and 600 mm pressure, the density of a gas is 42 gm/mm^(3). At the same temperature and 700 mm pressure, what is the density of the gas? |
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| 6481. |
Which of the following is correct regarding Ca2+ ? |
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Answer» Which of the following is correct regarding Ca2+ ? |
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| 6482. |
The covalency of oxygen is___ . |
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Answer» The covalency of oxygen is |
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| 6483. |
Alpha particles are represented as: |
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Answer» Alpha particles are represented as: |
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| 6484. |
What are halogens |
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Answer» What are halogens |
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| 6485. |
Which sub-atomic particles of an atom are present in the nucleus of an atom? A = Electrons B = Protons C = Neutrons |
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Answer» Which sub-atomic particles of an atom are present in the nucleus of an atom? A = Electrons B = Protons C = Neutrons |
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| 6486. |
Isotopes have same........... number but different ................. number. |
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Answer» Isotopes have same........... number but different ................. number. |
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| 6487. |
The atomic number and mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement? |
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Answer» The atomic number and mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement? |
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| 6488. |
Which has more number of atoms, 100 grams of sodium or 100 grams of iron |
| Answer» Which has more number of atoms, 100 grams of sodium or 100 grams of iron | |
| 6489. |
Differentiate between gas and vapour |
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Answer» Differentiate between gas and vapour |
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| 6490. |
Name a metal which is soft and a non-metal which is hard. |
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Answer» Name a metal which is soft and a non-metal which is hard. |
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| 6491. |
Calculate the percentage composition of oxygen in carbon dioxide (co2) |
| Answer» Calculate the percentage composition of oxygen in carbon dioxide (co2) | |
| 6492. |
Predict the physical state of a substance which has melting point below room temperature. |
| Answer» Predict the physical state of a substance which has melting point below room temperature. | |
| 6493. |
An isobar has |
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Answer» An isobar has |
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| 6494. |
Fill in the following blanks with suitable words : (a) Miscible liquids are separated by___ (b) Immiscible liquids are separated by using a___ (c) A mixture of kerosene and petrol can be separated by___ (d) The separation of liquids by fractional distillation is based on the difference in theri___ (e) The gases of air can be separated by fractional distillation of liquid air because they have different___ (f) A heterogeneous mixture of liquid and solid is conveniently separated by___ (g) If a mixture contains iron fillings as one of the constituents, it can be separated by using a ___ |
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Answer» Fill in the following blanks with suitable words : (a) Miscible liquids are separated by (b) Immiscible liquids are separated by using a (c) A mixture of kerosene and petrol can be separated by (d) The separation of liquids by fractional distillation is based on the difference in theri (e) The gases of air can be separated by fractional distillation of liquid air because they have different (f) A heterogeneous mixture of liquid and solid is conveniently separated by (g) If a mixture contains iron fillings as one of the constituents, it can be separated by using a |
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| 6495. |
Identify the colour change, when curd is tested with litmus paper? |
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Answer» Identify the colour change, when curd is tested with litmus paper? |
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| 6496. |
With fuel prices for combustion engine automobiles increasing, researchers and manufacturers have given more attention to the concept of an ultra light car. Using carbon composites, lighter steels and plastics, a fuel-efficient car of mass 540 kg can be manufactured. What is the difference between the weight of a 1450-kg Honda Accord (2007) and an ultra light car? |
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Answer» With fuel prices for combustion engine automobiles increasing, researchers and manufacturers have given more attention to the concept of an ultra light car. Using carbon composites, lighter steels and plastics, a fuel-efficient car of mass 540 kg can be manufactured. What is the difference between the weight of a 1450-kg Honda Accord (2007) and an ultra light car? |
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| 6497. |
A student spilled a bottle of ammonia in one corner of the laboratory.soon the whole laboratory was filled with pungent irritating smell.The students immediately open the windows and doors of the laboratory and switched on the exhaust fans.after sometime students got relief. Explain what did actually happened |
| Answer» A student spilled a bottle of ammonia in one corner of the laboratory.soon the whole laboratory was filled with pungent irritating smell.The students immediately open the windows and doors of the laboratory and switched on the exhaust fans.after sometime students got relief. Explain what did actually happened | |
| 6498. |
Balance the following chemical equation by replacing a, b, c, d and electric with appropriate natural numbers. aS + bHNO3 🔜cH2SO4 + dNO2 + eH2O Write the sum of a, b, c, d and e |
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Answer» Balance the following chemical equation by replacing a, b, c, d and electric with appropriate natural numbers. aS + bHNO3 🔜cH2SO4 + dNO2 + eH2O Write the sum of a, b, c, d and e |
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| 6499. |
Major industries that use nitric acid for manufacturing are: |
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Answer» Major industries that use nitric acid for manufacturing are: |
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| 6500. |
A certain nucleus X has a mass number 14 and atomic number 6. The nucleus X changes to Y14 after the loss of a particle. (a) Name the particle emitted. (b) Represent this change in the form of an equation. (c) A radioactive substance is oxidized. What change would you expect to take place in the nature of its radioactivity? Give a reason for your answer. [5 MARKS] |
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Answer» A certain nucleus X has a mass number 14 and atomic number 6. The nucleus X changes to Y14 after the loss of a particle. (a) Name the particle emitted. (b) Represent this change in the form of an equation. (c) A radioactive substance is oxidized. What change would you expect to take place in the nature of its radioactivity? Give a reason for your answer. [5 MARKS] |
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