InterviewSolution
Saved Bookmarks
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.
| 9451. |
How did charles law lead to the concept of absolute scale of temperature? |
|
Answer» How did charles law lead to the concept of absolute scale of temperature? |
|
| 9452. |
(a) Name the three fundamental particles of an atom. Give the symbol and charge of each particle. (b) Draw the orbital diagram of 4020Ca2+ ion and state the number of three fundamental particles present in it. |
|
Answer» (a) Name the three fundamental particles of an atom. Give the symbol and charge of each particle. (b) Draw the orbital diagram of 4020Ca2+ ion and state the number of three fundamental particles present in it. |
|
| 9453. |
Elements with stable electronic configurations can have maximum of ___ electrons in their outermost shell. |
|
Answer» Elements with stable electronic configurations can have maximum of |
|
| 9454. |
Name the apparatus you would use to separate oil from water. |
|
Answer» Name the apparatus you would use to separate oil from water. |
|
| 9455. |
Are PO4 and NH3 compounds |
|
Answer» Are PO4 and NH3 compounds |
|
| 9456. |
Which of the following is the correct order of boiling points? |
|
Answer» Which of the following is the correct order of boiling points? |
|
| 9457. |
Question 48. Identify the compound X on the basis of the reactions given below. Also, write the name and chemical formulae of A, B and C. |
|
Answer» Question 48. Identify the compound X on the basis of the reactions given below. Also, write the name and chemical formulae of A, B and C. 
|
|
| 9458. |
How will separate a mixture of iron filling and sand |
|
Answer» How will separate a mixture of iron filling and sand |
|
| 9459. |
Identify a set of physical properties of elements from the options given below. |
|
Answer» Identify a set of physical properties of elements from the options given below. |
|
| 9460. |
Which of the following is the correct statement for red lead |
|
Answer» Which of the following is the correct statement for red lead
|
|
| 9461. |
An element has atomic number 19 and mass number 39. How many electrons and protons are present in its unipositive ion? |
|
Answer» An element has atomic number 19 and mass number 39. How many electrons and protons are present in its unipositive ion? |
|
| 9462. |
Question 19.2 Write the balanced chemical equation for the following reaction and identify the type of reaction: Sodium hydroxide solution is treated with acetic acid to form sodium acetate and water. |
|
Answer» Question 19.2 Write the balanced chemical equation for the following reaction and identify the type of reaction: Sodium hydroxide solution is treated with acetic acid to form sodium acetate and water. |
|
| 9463. |
What kind of mixtures can be separated by the process of crystallisation ? |
|
Answer» What kind of mixtures can be separated by the process of crystallisation ? |
|
| 9464. |
A gas at 240 K is heated to 127 ℃ . Find the percentage change in the volume of the gas(pressure remaining constant). |
| Answer» A gas at 240 K is heated to 127 ℃ . Find the percentage change in the volume of the gas(pressure remaining constant). | |
| 9465. |
___ is the combining capacity of an atom. |
|
Answer» |
|
| 9466. |
Which of the following is\are not allotropes of carbon? |
|
Answer» Which of the following is\are not allotropes of carbon? |
|
| 9467. |
Which of the following scientist discovered neutrons? |
|
Answer» Which of the following scientist discovered neutrons? |
|
| 9468. |
Helium is preferred instead of hydrogen for filling balloons because it is: |
|
Answer» Helium is preferred instead of hydrogen for filling balloons because it is: |
|
| 9469. |
Which of the following statements regarding biogas are incorrect? |
|
Answer» Which of the following statements regarding biogas are incorrect? |
|
| 9470. |
Question 04. Which of the following salts does not contain water of crystallization? (a) Blue vitriol (b) Baking soda (c) Washing soda (d) Gypsum |
|
Answer» Question 04. |
|
| 9471. |
Which of the following explanation is best for not placing hydrogen in either the group of alkali metals or halogens? |
|
Answer» Which of the following explanation is best for not placing hydrogen in either the group of alkali metals or halogens?
|
|
| 9472. |
Why do elements combine? What is meant by the term chemical formula? Give one example to explain it. [3 MARKS] |
|
Answer» Why do elements combine? What is meant by the term chemical formula? Give one example to explain it. [3 MARKS] |
|
| 9473. |
Question 18 Classify the following as physical or chemical properties. a) The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements. (b) Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas. (c) Metallic sodium is soft enough to be cut with a knife. (d) Most metal oxides form alkalis on interacting with water. |
|
Answer» Question 18 Classify the following as physical or chemical properties. a) The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements. (b) Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas. (c) Metallic sodium is soft enough to be cut with a knife. (d) Most metal oxides form alkalis on interacting with water. |
|
| 9474. |
Why can't we call dispersed phase and dispersed medium as solute and solvent respectively? |
| Answer» Why can't we call dispersed phase and dispersed medium as solute and solvent respectively? | |
| 9475. |
The rate of diffusion of methane at a given temperature is twice that of a gas Z. What is the molecular weight of Z.? |
|
Answer» The rate of diffusion of methane at a given temperature is twice that of a gas Z. What is the molecular weight of Z.? |
|
| 9476. |
Which separation technique is used in salt from sea-water |
| Answer» Which separation technique is used in salt from sea-water | |
| 9477. |
Why do we feel more comfortable by drinking tea from a saucer rather than a cup? |
| Answer» Why do we feel more comfortable by drinking tea from a saucer rather than a cup? | |
| 9478. |
The atom of an element X has 7 electrons in its M shell. (a) Write the electronic configuration of element X. (b) What is the atomic number of element X? (c) Is it a metal or a non-metal? (d) What type of ion will be formed by an atom of element X? Write the symbol of the ion formed. (e) What could element X be? |
|
Answer» The atom of an element X has 7 electrons in its M shell. |
|
| 9479. |
Difference between thermal decomposition and thermal dissociation |
|
Answer» Difference between thermal decomposition and thermal dissociation |
|
| 9480. |
Fresh seawater is considered impure because |
|
Answer» Fresh seawater is considered impure because |
|
| 9481. |
According to Arrhenius theory, all the given compounds are acids except: |
|
Answer» According to Arrhenius theory, all the given compounds are acids except: |
|
| 9482. |
Which of the following gases on inhalation dissolves in the Blood Haemoglobin faster as compared to Oxygen? |
|
Answer» Which of the following gases on inhalation dissolves in the Blood Haemoglobin faster as compared to Oxygen? |
|
| 9483. |
Which among the particles is easiest to remove or add to the atom? |
|
Answer» Which among the particles is easiest to remove or add to the atom? |
|
| 9484. |
What is the difference between atoms, elements, molecules and compounds? |
|
Answer» What is the difference between atoms, elements, molecules and compounds? |
|
| 9485. |
Why is the percentage of noble gas more than carbon dioxide? |
|
Answer» Why is the percentage of noble gas more than carbon dioxide? |
|
| 9486. |
What is a condensation nuclei? What is adhesive and cohesive? |
|
Answer» What is a condensation nuclei? What is adhesive and cohesive? |
|
| 9487. |
What is a milky glass? |
|
Answer» What is a milky glass? |
|
| 9488. |
If paper is a solid then why it can be fold or torn |
|
Answer» If paper is a solid then why it can be fold or torn |
|
| 9489. |
Which of the following do not undergo significant expansion or contraction with change in their temperature? |
|
Answer» Which of the following do not undergo significant expansion or contraction with change in their temperature? |
|
| 9490. |
What is liquefaction? |
| Answer» What is liquefaction? | |
| 9491. |
Give an example of a decomposition reaction. Describe an activity to illustrate such a reaction by heating. |
|
Answer» Give an example of a decomposition reaction. Describe an activity to illustrate such a reaction by heating. |
|
| 9492. |
Question 14 While diluting a solution of salt in water, a student by mistake added acetone (boiling point 56∘C). What technique can be employed to get back the acetone? Justify your choice. |
|
Answer» Question 14 While diluting a solution of salt in water, a student by mistake added acetone (boiling point 56∘C). What technique can be employed to get back the acetone? Justify your choice. |
|
| 9493. |
Which chemical requires only one reactant for its formation? |
|
Answer» Which chemical requires only one reactant for its formation? |
|
| 9494. |
The total number of electrons in the orbit shell is given by the formula 2n square. Then in k shell =2 ; l shell =8 and m = 18. Then the total number of electrons in the sodium is 20. Then why do we write it as 2,8,8,2 instead of writing as 2,8,10 |
| Answer» The total number of electrons in the orbit shell is given by the formula 2n square. Then in k shell =2 ; l shell =8 and m = 18. Then the total number of electrons in the sodium is 20. Then why do we write it as 2,8,8,2 instead of writing as 2,8,10 | |
| 9495. |
Which of this is a physical change? |
|
Answer» Which of this is a physical change? |
|
| 9496. |
In an oxygen atom, the number of electrons in the valence shell is___. |
|
Answer» In an oxygen atom, the number of electrons in the valence shell is___. |
|
| 9497. |
What will be the minimum pressure required to compress 500 dm3 of air at 1 bar to 200 dm3 at 300C? |
|
Answer» What will be the minimum pressure required to compress 500 dm3 of air at 1 bar to 200 dm3 at 300C? |
|
| 9498. |
How does photons travel? |
| Answer» How does photons travel? | |
| 9499. |
What were the conclusions made by Rutherford as a result of alpha particle scattering experiment? |
|
Answer» What were the conclusions made by Rutherford as a result of alpha particle scattering experiment? |
|
| 9500. |
What elements do the following compounds contain ? Sugar, Common salt |
|
Answer» What elements do the following compounds contain ? Sugar, Common salt |
|