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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.
| 12601. |
Write the structural formula of propene. |
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Answer» Write the structural formula of propene. |
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| 12602. |
The SI unit of the calorific value of a fuel is :- |
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Answer» The SI unit of the calorific value of a fuel is :- |
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| 12603. |
Li and Mg both form chlorides which are: |
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Answer» Li and Mg both form chlorides which are: |
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| 12604. |
Which among the following chemical characteristics of elements was used by Mendeleev for giving the classification of his periodic table? |
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Answer» Which among the following chemical characteristics of elements was used by Mendeleev for giving the classification of his periodic table? |
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| 12605. |
(a) What ar noble gases? What are the characteristics of the electronic configuration of noble gases? (b) What is the cause of chemical bonding (or chemical combination ) of an atom of an element? |
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Answer» (a) What ar noble gases? What are the characteristics of the electronic configuration of noble gases? |
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| 12606. |
Conc. sulphuric acid is a : |
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Answer» Conc. sulphuric acid is a : |
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| 12607. |
Is anodizing only applicable on aluminium or also on copper? |
| Answer» Is anodizing only applicable on aluminium or also on copper? | |
| 12608. |
0.456 g of a metal yielded 0.606 g of its chloride. Calculate the equivalent mass of the metal. |
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Answer» 0.456 g of a metal yielded 0.606 g of its chloride. Calculate the equivalent mass of the metal. |
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| 12609. |
How many moles of H2O is produced when C3H8 undergoes combustion ?4 |
Answer» How many moles of H2O is produced when C3H8 undergoes combustion ?
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| 12610. |
In nature, metal A is found in a free state while metal B is found in the form of its compounds, Which of these two will be nearer to the top of the activity series of metals? |
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Answer» In nature, metal A is found in a free state while metal B is found in the form of its compounds, Which of these two will be nearer to the top of the activity series of metals? |
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| 12611. |
An element X froms two oxides XO and XO2 the oxide XO has no actioin on litmus solution but oxide XO2 turns litmus solution red. (a) what is the nature fo oxide XO ? (b) What is the nature of oxide XO2 ? (c) Would you call element X a metal or a non-metal ? Give reason for your choice. (d) Can you give an example of element like X? |
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Answer» An element X froms two oxides XO and XO2 the oxide XO has no actioin on litmus solution but oxide XO2 turns litmus solution red. |
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| 12612. |
Equal volume of 0.1 M AgNO3 and 0.2 M NaCl are mixed. The concentration of NO−3 ions in the mixture will be: |
| Answer» Equal volume of 0.1 M AgNO3 and 0.2 M NaCl are mixed. The concentration of NO−3 ions in the mixture will be: | |
| 12613. |
Write down the various exceptions in the physical properties of non-metals? [3 MARKS] |
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Answer» Write down the various exceptions in the physical properties of non-metals? [3 MARKS] |
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| 12614. |
How is the 'flow of energy' different from the 'flow of nutrients' in an ecosystem? |
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Answer» How is the 'flow of energy' different from the 'flow of nutrients' in an ecosystem? |
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| 12615. |
2 litres of alcohol is present in 8 litres of an aqueous solution of alcohol. The volume percent will be? |
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Answer» 2 litres of alcohol is present in 8 litres of an aqueous solution of alcohol. The volume percent will be? |
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| 12616. |
Do atoms normally exist in free state? Why not? If not, how do they exist? If yes, explain? [3 MARKS] |
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Answer» Do atoms normally exist in free state? Why not? If not, how do they exist? If yes, explain? [3 MARKS] |
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| 12617. |
E- waste is ___ waste which is hazardous to human life and enivironment. |
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Answer» E- waste is |
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| 12618. |
Which compound has the highest covalent character? |
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Answer» Which compound has the highest covalent character? |
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| 12619. |
Question 2 In a food chain, the third trophic level is always occupied by (a) carnivores (b) herbivores (c) decomposers (d) producers |
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Answer» Question 2 |
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| 12620. |
An element reacts with oxygen to form oxide which dissolve in dilute hydrochloric acid.the oxide formed turns a solution of red litmus blue. Is the element a metal or a nonmetal? Explain with an example. |
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Answer» An element reacts with oxygen to form oxide which dissolve in dilute hydrochloric acid.the oxide formed turns a solution of red litmus blue. Is the element a metal or a nonmetal? Explain with an example. |
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| 12621. |
What is the colour of lead oxide ? |
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Answer» What is the colour of lead oxide ? |
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| 12622. |
What are polar and non polar solvents ? Differentiate between them |
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Answer» What are polar and non polar solvents ? Differentiate between them |
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| 12623. |
We use a solution of slaked lime to whitewash the walls. In the beginning the wall looks rough and coarse, but after 2 - 3 days the wall appears smooth and shiny. This is due to the formation of: |
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Answer» We use a solution of slaked lime to whitewash the walls. In the beginning the wall looks rough and coarse, but after 2 - 3 days the wall appears smooth and shiny. This is due to the formation of: |
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| 12624. |
An organic compound A (molecular formula C2H4O2) reacts with Na metal to form a compound B and evolves a gas which burns with a pop sound. Compound A on treatment with an alcohol C in the presence of a little of concentrated sulphuric acid forms a sweet-smelling compound D (molecular formula C2H6O2) . Compound D on treatment with NaOH solution gives back B and C. Indentity A, B, C and D. |
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Answer» An organic compound A (molecular formula C2H4O2) reacts with Na metal to form a compound B and evolves a gas which burns with a pop sound. Compound A on treatment with an alcohol C in the presence of a little of concentrated sulphuric acid forms a sweet-smelling compound D (molecular formula C2H6O2) . Compound D on treatment with NaOH solution gives back B and C. Indentity A, B, C and D. |
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| 12625. |
What is the general formula of alkenes? |
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Answer» What is the general formula of alkenes? |
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| 12626. |
How is the O2 molecule formed? |
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Answer» How is the O2 molecule formed? |
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| 12627. |
Largest number of ions is present in the electrolyte |
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Answer» Largest number of ions is present in the electrolyte |
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| 12628. |
Which of the following statements is true about element R present in 13th group of the periodic table? |
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Answer» Which of the following statements is true about element R present in 13th group of the periodic table? |
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| 12629. |
Which of the following method is used to separate different components of petroleum? |
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Answer» Which of the following method is used to separate different components of petroleum? |
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| 12630. |
Cryolite is added to alumina to reduce its: |
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Answer» Cryolite is added to alumina to reduce its: |
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| 12631. |
Which of the following are examples of aerosol? |
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Answer» Which of the following are examples of aerosol? |
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| 12632. |
Write balanced equation for the reaction of dilute hydrochloric acid with each of the following: Iron |
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Answer» Write balanced equation for the reaction of dilute hydrochloric acid with each of the following: Iron |
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| 12633. |
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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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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| 12634. |
Which one of the following is an example of decomposition reaction? |
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Answer» Which one of the following is an example of decomposition reaction? |
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| 12635. |
F < Cl < Br < I is the correct arrangement in terms of : |
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Answer» F < Cl < Br < I is the correct arrangement in terms of : |
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| 12636. |
Write balanced equations and name the products formed when: [4 MARKS] (a) sodium hydrogen carbonate is added to nitric acid, (b) cupric oxide reacts with nitric acid, (c) zinc reacts with dilute nitric acid, (d) concentrated nitric acid is heated. |
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Answer» Write balanced equations and name the products formed when: [4 MARKS] (a) sodium hydrogen carbonate is added to nitric acid, (b) cupric oxide reacts with nitric acid, (c) zinc reacts with dilute nitric acid, (d) concentrated nitric acid is heated. |
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| 12637. |
The cleansing action of soap is due to the formation of ___ in water. |
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Answer» The cleansing action of soap is due to the formation of |
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| 12638. |
How will you account for the acidic nature of HNO3? Justify your answer by giving three different types of reactions with balanced chemical equations. [5 MARKS] |
| Answer» How will you account for the acidic nature of HNO3? Justify your answer by giving three different types of reactions with balanced chemical equations. [5 MARKS] | |
| 12639. |
Question 22. Which of the following is not a mineral acid? (a) Hydrochloric acid (b) Citric acid (c) Sulphuric acid (d) Nitric acid |
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Answer» Question 22. |
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| 12640. |
Identify an example of covalent solid: |
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Answer» Identify an example of covalent solid: |
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| 12641. |
Calculate the mass of H2O formed as a result of the reaction |
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Answer» Calculate the mass of H2O formed as a result of the reaction |
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| 12642. |
Write all the possible isomers of alkane having 7 carbon atoms and write their IUPAC names. |
| Answer» Write all the possible isomers of alkane having 7 carbon atoms and write their IUPAC names. | |
| 12643. |
Hydrogen is generated by the action of steam with heated magnesium. Calculate the mass of magnesium which will produce just sufficient hydrogen to combine with all the oxygen that can be obtained by the complete decomposition of 24.5 g of KClO3. |
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Answer» Hydrogen is generated by the action of steam with heated magnesium. Calculate the mass of magnesium which will produce just sufficient hydrogen to combine with all the oxygen that can be obtained by the complete decomposition of 24.5 g of KClO3. |
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| 12644. |
In the modern periodic table sodium element(atomic number 11) is surrounded by elements with atomic number 3 , 12 and 19 respectively. Which of these have physical and chemical properties resembling sodium? |
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Answer» In the modern periodic table sodium element(atomic number 11) is surrounded by elements with atomic number 3 , 12 and 19 respectively. Which of these have physical and chemical properties resembling sodium? |
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| 12645. |
Species of fungi that have an ability to decompose rubber from garbage |
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Answer» Species of fungi that have an ability to decompose rubber from garbage |
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| 12646. |
An electrolyte |
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Answer» An electrolyte |
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| 12647. |
Electronic configuration of H− is: |
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Answer» Electronic configuration of H− is: |
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| 12648. |
What is obtained on heating NaHCO3? |
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Answer» What is obtained on heating NaHCO3? |
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| 12649. |
Is distilled water hard or soft water? Why? |
| Answer» Is distilled water hard or soft water? Why? | |
| 12650. |
One of the following burns without producing a flame. This is : (a) wood (b) charcoal (c) LPG (d) candle |
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Answer» One of the following burns without producing a flame. This is : (a) wood (b) charcoal (c) LPG (d) candle |
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