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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Give the formulae of the compounds formed from the following sets of elements: (a) Calcium and fluorine (b) Hydrogen and sulphur (c) Nitrogen and hydrogen (d) Carbon and chlorine (e) Sodium and oxygen (f) Carbon and oxygen |
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Answer» Give the formulae of the compounds formed from the following sets of elements: |
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| 2. |
In case of CHCOOH, the oxidation number of carbon of carboxylic group is |
| Answer» In case of CHCOOH, the oxidation number of carbon of carboxylic group is | |
| 3. |
फ़िल्म समीक्षक राजकपूर को किस तरह का कलाकार मानते थे? |
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Answer» फ़िल्म समीक्षक राजकपूर को किस तरह का कलाकार मानते थे? |
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| 4. |
You might not have seen air, but surely you musthave felt its presence in many ways . So at which of these places is air notpresent? |
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Answer» You might not have seen air, but surely you must |
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| 5. |
How many covalent bonds are present in an iso-butane molecule ? |
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Answer» How many covalent bonds are present in an iso-butane molecule ? |
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| 6. |
Answer the followingA. Whati is the difference in the atomic models of Thomson and Rutherford ?B. What is meant by valency of an element ? what is the relationship between the number of valence electron and valency ?C. What is meant by atomic mass number ? Explain how the atomic number and mass number of carbon are 6 and 12 respectively.D. what is meant by subatomic particle ? give brief information of three subatomic particles with refrence to electrical charge, mass and location. |
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Answer» Answer the following A. Whati is the difference in the atomic models of Thomson and Rutherford ? B. What is meant by valency of an element ? what is the relationship between the number of valence electron and valency ? C. What is meant by atomic mass number ? Explain how the atomic number and mass number of carbon are 6 and 12 respectively. D. what is meant by subatomic particle ? give brief information of three subatomic particles with refrence to electrical charge, mass and location. |
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| 7. |
Explain slow and fast change with the help of examples. |
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Answer» Explain slow and fast change with the help of examples. |
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| 8. |
We have compared the tyndall effect to the beam of light in a canopy of forest. Milk is a colloid. Then why doesn't it scatters the light ? |
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Answer» We have compared the tyndall effect to the beam of light in a canopy of forest. Milk is a colloid. Then why doesn't it scatters the light ? |
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| 9. |
What are the main postulates of Bohr's atomic theory? |
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Answer» What are the main postulates of Bohr's atomic theory? |
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| 10. |
Classify the following as physical or chemical changes:(i) Cooking of food (ii) Boiling of water(iii) Cutting of trees (iv) Dissolving salt in water(v) Digestion of food (vi) Melting of ice |
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Answer» Classify the following as physical or chemical changes: (i) Cooking of food (ii) Boiling of water (iii) Cutting of trees (iv) Dissolving salt in water (v) Digestion of food (vi) Melting of ice |
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| 11. |
18. Which of the following molecules has no dative Bond? 1) Carbon monoxide 2) Carbonate ion 3) Sulphate ion 4) All of these |
| Answer» 18. Which of the following molecules has no dative Bond? 1) Carbon monoxide 2) Carbonate ion 3) Sulphate ion 4) All of these | |
| 12. |
Is there any other test to test the presence of fats in a given substance other than pouring that substance into some paper like material and then seeing whether it turns translucent or not? Because if we even pour water or any liquid on that paper like material it also makes the paper turn translucent... |
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Answer» Is there any other test to test the presence of fats in a given substance other than pouring that substance into some paper like material and then seeing whether it turns translucent or not? Because if we even pour water or any liquid on that paper like material it also makes the paper turn translucent... |
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| 13. |
When sodium sulphate solution is added to barium chloride, a white precipitate is formed. Write the chemical name of precipitate obtained and type of chemical reaction involved in this process. |
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Answer» When sodium sulphate solution is added to barium chloride, a white precipitate is formed. Write the chemical name of precipitate obtained and type of chemical reaction involved in this process. |
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| 14. |
Dear sir, Please help me with the question below. If a lighted splint is put into a small sample of a gas and a 'pop' sound is heard, the gas is identified as hydrogen. What is the 'pop' sound due to? a) formation of hydrogen molecule. b) formation of oxygen molecule. c) combustion of hydrogen. d) combustion of oxygen. |
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Answer» Dear sir, Please help me with the question below. If a lighted splint is put into a small sample of a gas and a 'pop' sound is heard, the gas is identified as hydrogen. What is the 'pop' sound due to? a) formation of hydrogen molecule. b) formation of oxygen molecule. c) combustion of hydrogen. d) combustion of oxygen. |
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| 15. |
State Law of Reciprocal Proportions and who gave this law? |
| Answer» State Law of Reciprocal Proportions and who gave this law? | |
| 16. |
13.how atomic number was discovered |
| Answer» 13.how atomic number was discovered | |
| 17. |
Which one of the following statement is correct? |
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Answer» Which one of the following statement is correct? |
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| 18. |
State three reasons why you think air is a mixture and water is a compound. |
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Answer» State three reasons why you think air is a mixture and water is a compound. |
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| 19. |
How many electrons are there in f subshell of Np (Z=93) in ground state electronic configuration |
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Answer» How many electrons are there in f subshell of Np (Z=93) in ground state electronic configuration |
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| 20. |
22Mg24 and 22Mg26 are symbols of two isotops of magnesium. A. Compare the atoms of these isotopes with respect to: 1) composition of their nuclei 2) there electronic configuration B. Give reason why the two isotopes of magnesium have different mass numbers |
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Answer» 22Mg24 and 22Mg26 are symbols of two isotops of magnesium. A. Compare the atoms of these isotopes with respect to: 1) composition of their nuclei 2) there electronic configuration B. Give reason why the two isotopes of magnesium have different mass numbers |
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| 21. |
14.what is matter and what are substances ?what is the difference between matter and substance?explain elaborately |
| Answer» 14.what is matter and what are substances ?what is the difference between matter and substance?explain elaborately | |
| 22. |
What is the effect of increasing and decreasing temperature on the solubility of the gas in a liquid? |
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Answer» What is the effect of increasing and decreasing temperature on the solubility of the gas in a liquid? |
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| 23. |
At 0∘C and 760 mm Hg pressure, a gas occupies a volume of 100 cm3. The temperature Of the gas is increased by one fifth and the pressure is increased one and a half times. Calculate the final volume of the gas. |
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Answer» At 0∘C and 760 mm Hg pressure, a gas occupies a volume of 100 cm3. The temperature Of the gas is increased by one fifth and the pressure is increased one and a half times. Calculate the final volume of the gas. |
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| 24. |
Associez les éléments des deux colonnes. |
| Answer» Associez les éléments des deux colonnes. | |
| 25. |
What is active mass of a pure solid or liquid? |
| Answer» What is active mass of a pure solid or liquid? | |
| 26. |
An iron nail is immersed in a solution of copper sulphate of copper sulphate and when it is removed from the solution, it is coated with a layer of copper metal. After that a different iron nail is immersed in a solution of zinc nitrate and removed, this nail rusted just as rapidly as a new iron nail. Rank these three metals in order of activity from most active to least active. |
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Answer» An iron nail is immersed in a solution of copper sulphate of copper sulphate and when it is removed from the solution, it is coated with a layer of copper metal. After that a different iron nail is immersed in a solution of zinc nitrate and removed, this nail rusted just as rapidly as a new iron nail. Rank these three metals in order of activity from most active to least active. |
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| 27. |
The total number of electrons in a principal energy shell is designated by |
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Answer» The total number of electrons in a principal energy shell is designated by |
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| 28. |
which sequence correctly describes relative bond strength of oxygen molecule, superoxide ion and peroxide ion? (1) O_2O_2^->O_2^{2-} (3)O_2>O_2^->O_2^{2-} (4) O_2>O_2^->O_2^{2- |
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Answer» which sequence correctly describes relative bond strength of oxygen molecule, superoxide ion and peroxide ion? (1) O_2 |
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| 29. |
What size of particles does a colloidal system has? |
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Answer» What size of particles does a colloidal system has? |
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| 30. |
________ is the process by which liquid water gets converted into vapour. |
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Answer» ________ is the process by which liquid water gets converted into vapour. |
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| 31. |
High-energy photons |
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Answer» High-energy photons |
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| 32. |
Formal charge on all H atoms in NH4 + ion |
| Answer» Formal charge on all H atoms in NH4 + ion | |
| 33. |
What is definitive and non-definitive state arrangement of matter? |
| Answer» What is definitive and non-definitive state arrangement of matter? | |
| 34. |
Nitric acid is ___ (monobasic/dibasic/tribasic). |
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Answer» Nitric acid is |
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| 35. |
How many moles equal to 33.6 litre? |
| Answer» How many moles equal to 33.6 litre? | |
| 36. |
What is sublimation? Write the names of everyday substances that sublimate. |
| Answer» What is sublimation? Write the names of everyday substances that sublimate. | |
| 37. |
Identify the missing elements from the following Dobereiner's triads. |
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Answer» Identify the missing elements from the following Dobereiner's triads.
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| 38. |
If a compound has fixed melting and boiling points, what can you say about the compound? |
| Answer» If a compound has fixed melting and boiling points, what can you say about the compound? | |
| 39. |
Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because- |
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Answer» Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because- |
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| 40. |
A gas occupies 12.3 litres at a pressure of 40 mmHg. What is the volume when the pressure is increased to 60 mmHg, at constant temperature?8.2 |
Answer» A gas occupies 12.3 litres at a pressure of 40 mmHg. What is the volume when the pressure is increased to 60 mmHg, at constant temperature?
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| 41. |
compound is pure substance or not ?? |
| Answer» compound is pure substance or not ?? | |
| 42. |
Explain effusion. |
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Answer» Explain effusion. |
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| 43. |
The concentration (w/w%) of a 200 g solution of common salt is 10%. If 20 g more water is mixed in it then its concentration becomes |
| Answer» The concentration (w/w%) of a 200 g solution of common salt is 10%. If 20 g more water is mixed in it then its concentration becomes | |
| 44. |
State the law of conservation of mass ? |
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Answer» State the law of conservation of mass ? |
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| 45. |
85.What is the effect of dilution on the PH value of acids and bases |
| Answer» 85.What is the effect of dilution on the PH value of acids and bases | |
| 46. |
The elements Hygrogen and Oxygen separately with the third epement Sulphur to form H2O and SO2 respectively, and they combine directly with each other to form H2O. How the compound formed can be H2O |
| Answer» The elements Hygrogen and Oxygen separately with the third epement Sulphur to form H2O and SO2 respectively, and they combine directly with each other to form H2O. How the compound formed can be H2O | |
| 47. |
Three photons coming from excited atomic-hydrogen sample are picked up. Their energies are 12.1eV, 10.2eV and 1.9eV. These photons must come from |
| Answer» Three photons coming from excited atomic-hydrogen sample are picked up. Their energies are 12.1eV, 10.2eV and 1.9eV. These photons must come from | |
| 48. |
A fixed amount of gas expanded from 5 L to 7.5 L at a constant temperature. The initial pressure is 3 atm. Find the final pressure. (in atm)2 |
Answer» A fixed amount of gas expanded from 5 L to 7.5 L at a constant temperature. The initial pressure is 3 atm. Find the final pressure. (in atm)
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| 49. |
In an adiabatic condition the relation i.e PY^gamma is in between Pressure and Volume then what will be in between1. temperature and volume2. temperature and pressure |
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Answer» In an adiabatic condition the relation i.e PY^gamma is in between Pressure and Volume then what will be in between 1. temperature and volume 2. temperature and pressure |
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| 50. |
meaning of aqueous solution in simple words |
| Answer» meaning of aqueous solution in simple words | |
