10223 + Interview Questions in Chemistry Page 12 InterviewSolution

551.	What is smog ? State its damaging effects.
Answer» What is smog ? State its damaging effects.

Discussion

552.	Substance X present in vinegar reacts with substance Y present in the milk of magnesia. The product obtained from the reaction between X and Y is?
Answer» Substance X present in vinegar reacts with substance Y present in the milk of magnesia. The product obtained from the reaction between X and Y is?

Discussion

553.	An uncharged atom has a mass number of 7 and contains 2 neutrons, find the number of electrons in it.
Answer» An uncharged atom has a mass number of 7 and contains 2 neutrons, find the number of electrons in it.

Discussion

554.	31.an electron in an atom A)) moves around its nucleus in definite energy levels B)) has no fixed location around nucleus C)) both are true
Answer» 31.an electron in an atom A)) moves around its nucleus in definite energy levels B)) has no fixed location around nucleus C)) both are true

Discussion

555.	Question 23 Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 g. Molar atomic mass of magnesium is 24g mol−1.
Answer» Question 23 Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 g. Molar atomic mass of magnesium is $24 g m o l^{- 1}$ .

Discussion

556.	Ksp of Mg(OH)2 is 4.0 X 10^-12. The number of moles of Mg 2+ ions in one litre of its saturated solution in 0.1 M NaOH is :1) 4 X 10^-42)1.0X 10^-43)2 X 10^-64) 8.0 X10^-6
Answer» Ksp of Mg(OH)2 is 4.0 X 10^-12. The number of moles of Mg 2+ ions in one litre of its saturated solution in 0.1 M NaOH is : 1) 4 X 10^-4 2)1.0X 10^-4 3)2 X 10^-6 4) 8.0 X10^-6

Discussion

557.	Question 3:What happens to Red litmus paper when added to acid and base solution?
Answer» Question 3: What happens to Red litmus paper when added to acid and base solution?

557.

Question 3:What happens to Red litmus paper when added to acid and base solution?

Answer»

Question 3:

What happens to Red litmus paper when added to acid and base solution?

Discussion

558.	There are two charged particles of same nature, and they are fixed. The position of equilibrium for a third charge will be(1) near the smaller fixed charge(2) near the greater fixed charge(3) outside on the line joining two charges(4) none of these
Answer» There are two charged particles of same nature, and they are fixed. The position of equilibrium for a third charge will be (1) near the smaller fixed charge (2) near the greater fixed charge (3) outside on the line joining two charges (4) none of these

Discussion

559.	Question 7 (h) Which of the following materials fall in the category of a “pure substance”? h. Wood
Answer» Question 7 (h) Which of the following materials fall in the category of a “pure substance”? h. Wood

Discussion

560.	Which has highest m.p and b.p covalent or ionic bonds and in solid state it is given that covalent solids has very highest m.p and b.p?
Answer» Which has highest m.p and b.p covalent or ionic bonds and in solid state it is given that covalent solids has very highest m.p and b.p?

Discussion

561.	Select the best oxidising agent from the given options
Answer» Select the best oxidising agent from the given options

Discussion

562.	The process by which matter in its solid state changes to gaseous state due to an increase in temperature and/or decrease in pressure is called as ______________.
Answer» The process by which matter in its solid state changes to gaseous state due to an increase in temperature and/or decrease in pressure is called as ______________.

Discussion

563.	Symbols for elements Lead and Mercury are, respectively:
Answer» Symbols for elements Lead and Mercury are, respectively:

Discussion

564.	13.If sulphuric acid is an ionic compound then why it is formed by sharing of electrons?
Answer» 13.If sulphuric acid is an ionic compound then why it is formed by sharing of electrons?

Discussion

565.	Question 5 (a)What is the physical state of water at— (a)25∘C
Answer» Question 5 (a) What is the physical state of water at— $(a) 25^{\circ} C$

Discussion

566.	Activity : take a seringe fill it with simple air close the exit with the help of rubber cork now if we apply a great force and some how gas has changed its state to solid Then to how many exnet would t be a solid and if we remove the cork then what will happen ?
Answer» Activity : take a seringe fill it with simple air close the exit with the help of rubber cork now if we apply a great force and some how gas has changed its state to solid Then to how many exnet would t be a solid and if we remove the cork then what will happen ?

Discussion

567.	Which type of elements, metals or non-metals, show the property of brittleness ?
Answer» Which type of elements, metals or non-metals, show the property of brittleness ?

Discussion

568.	1 mole glucose is added to 1 L of water K (H2O)-0.512 K kg mole-1 boiling point of solution will be
Answer» 1 mole glucose is added to 1 L of water K (H2O)-0.512 K kg mole-1 boiling point of solution will be

Discussion

569.	The dissociation energy of CH4(g) is 360kcal mol-1 and that of of C2H6 (g) is 620 kcal mol-1.The C-C bond energy ?
Answer» The dissociation energy of CH4(g) is 360kcal mol-1 and that of of C2H6 (g) is 620 kcal mol-1.The C-C bond energy ?

Discussion

570.	In the recent years, a high rate of depletion of ozone is been detected in the –
Answer» In the recent years, a high rate of depletion of ozone is been detected in the –

Discussion

571.	11.A B ; K1 3B 3C ; K2 D C ; K3 Then find the constant K4 for the reaction A D Note - ( is an equilliburium sign)
Answer» 11.A <=> B ; K1 3B <=> 3C ; K2 D <=> C ; K3 Then find the constant K4 for the reaction A <=> D Note - ( <=> is an equilliburium sign)

Discussion

572.	A current strength of 96.5 A is passed for 10s through 1L of a solution of 0.01M aqueous CuSO_4 . Calculate the pH of the solution
Answer» A current strength of 96.5 A is passed for 10s through 1L of a solution of 0.01M aqueous CuSO_4 . Calculate the pH of the solution

Discussion

573.	What is the maximum number of hydrogen atoms required to attain the octet configuration by carbon?
Answer» What is the maximum number of hydrogen atoms required to attain the octet configuration by carbon?

Discussion

574.	For a reaction, N2(g)+3H2(g) →2NH3 (g), the rate of formation of NH_3 was found to be 2 x 10^{-2} mol/dm3/s. The rate of consumption of N2 will b
Answer» For a reaction, N2(g)+3H2(g) →2NH3 (g), the rate of formation of NH_3 was found to be 2 x 10^{-2} mol/dm3/s. The rate of consumption of N2 will b

Discussion

575.	The electronegativity of H and Cl are 2.1 and 3.0 respectively .The nature of HCl is
Answer» The electronegativity of H and Cl are 2.1 and 3.0 respectively .The nature of HCl is

Discussion

576.	Sulphur and oxygen are known to form two compounds. The sulphur content in one of these is 51% while in the other is 41% . Show that this data is in agreement with the law of multiple proportion? With solution
Answer» Sulphur and oxygen are known to form two compounds. The sulphur content in one of these is 51% while in the other is 41% . Show that this data is in agreement with the law of multiple proportion? With solution

Discussion

577.	The subatomic particle which has no charge but mass nearly equal to that of a proton is:
Answer» The subatomic particle which has no charge but mass nearly equal to that of a proton is:

Discussion

578.	Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a droplets of water around it. Why?
Answer» Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a droplets of water around it. Why?

Discussion

579.	A current of 4 ampere was passed for 1.5 hours through a solution of copper sulphate when 3.2g of copper was deposited.calculate the current effeciency.
Answer» A current of 4 ampere was passed for 1.5 hours through a solution of copper sulphate when 3.2g of copper was deposited.calculate the current effeciency.

Discussion

580.	The general formula of cyclic alkanes is-
Answer» The general formula of cyclic alkanes is-

Discussion

581.	Question 27People usually keep Angethi/burning coal in their closed rooms during winter season. Why is it advised to keep the door open?
Answer» Question 27 People usually keep Angethi/burning coal in their closed rooms during winter season. Why is it advised to keep the door open?

Discussion

582.	How does the nucleus of the atom have protons in a certain place shouldn't they be repelling each other as they are of same charge
Answer» How does the nucleus of the atom have protons in a certain place shouldn't they be repelling each other as they are of same charge

Discussion

583.	The number of electrons in an atom of Fluorine is 9. Its electronic configuration is _______ .
Answer» The number of electrons in an atom of Fluorine is 9. Its electronic configuration is _______ .

Discussion

584.	'बालम आवो हमारे गेह रे' में कवि किसका आह्वान कर रहा है और क्यों?
Answer» 'बालम आवो हमारे गेह रे' में कवि किसका आह्वान कर रहा है और क्यों?

Discussion

585.	How to find number of p pi -d pi and p pi-p pi bonds in nitrate and phosphate ions ?
Answer» How to find number of p pi -d pi and p pi-p pi bonds in nitrate and phosphate ions ?

Discussion

586.	How do we obtain bleaching powder?
Answer» How do we obtain bleaching powder?

Discussion

587.	25.What are anti-ferromagnets?
Answer» 25.What are anti-ferromagnets?

Discussion

588.	Burst the bubbles with a correct subtraction equation.
Answer» Burst the bubbles with a correct subtraction equation.

Discussion

589.	The future you synthesizes a new element. A neutral atom of the element, say 'X', has 4 electrons and 2 neutrons. How will you represent the nucleus of the element in your award winning paper?
Answer» The future you synthesizes a new element. A neutral atom of the element, say 'X', has 4 electrons and 2 neutrons. How will you represent the nucleus of the element in your award winning paper?

Discussion

590.	How are the formulas are made
Answer» How are the formulas are made

Discussion

591.	Write the uses.a. Anodizingb. Powder coatingc. Radioactive substancesd. Ceramic
Answer» Write the uses. a. Anodizing b. Powder coating c. Radioactive substances d. Ceramic

Discussion

592.	Which of the following match of molecules with the type of forces existing between them is not correct A O2(g) - dispersion B HF(l)- hydrogen bonding C HCl(g)- london forces D Cl2 and HCl- dipole induced dipole
Answer» Which of the following match of molecules with the type of forces existing between them is not correct A O2(g) - dispersion B HF(l)- hydrogen bonding C HCl(g)- london forces D Cl2 and HCl- dipole induced dipole

Discussion

593.	The number of mole of KMnO4 reduced by 1 mole of KI in alkaline medium isa)1 b)2 c)5 d)1/5
Answer» The number of mole of KMnO4 reduced by 1 mole of KI in alkaline medium is a)1 b)2 c)5 d)1/5

Discussion

594.	41. In Wacker oxidation of ethene,product formed is??
Answer» 41. In Wacker oxidation of ethene,product formed is??

Discussion

595.	Calculate the mass of 3.011×1023 nitrogen molecule.
Answer» Calculate the mass of $3.011 \times 10^{23}$ nitrogen molecule.

Discussion

596.	what is ripened cheese?
Answer» what is ripened cheese?

Discussion

597.	Question 43. In the following schematic diagram for the preparation of hydrogen gas as shown in the figure, what would happen if the following changes are made? In place of zinc granules, same amount of zinc dust is taken in the test tube. Instead of dilute acid, dilute hydrochloric acid is taken. In place of zinc, copper turnings are taken. Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated.
Answer» Question 43. In the following schematic diagram for the preparation of hydrogen gas as shown in the figure, what would happen if the following changes are made? In place of zinc granules, same amount of zinc dust is taken in the test tube. Instead of dilute acid, dilute hydrochloric acid is taken. In place of zinc, copper turnings are taken. Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated.

Discussion

598.	What is the formula of zinc sulphites
Answer» What is the formula of zinc sulphites

Discussion

599.	If we are given any equation on the basis of law of proportion or mass how do we know that whether we have to add or solve by finding out the ratio ? is it that in law of mass heating word would be used in the question ?
Answer» If we are given any equation on the basis of law of proportion or mass how do we know that whether we have to add or solve by finding out the ratio ? is it that in law of mass heating word would be used in the question ?

Discussion

600.	In a hydrogen like atom, when an electron jumps from the M−shell to the L−shell, the wavelength of emitted radiation is λ. If an electron jumps from N−shell to the L−shell, the wavelength of emitted radiation will be:
Answer» In a hydrogen like atom, when an electron jumps from the $M -$ shell to the $L -$ shell, the wavelength of emitted radiation is $λ$ . If an electron jumps from $N -$ shell to the $L -$ shell, the wavelength of emitted radiation will be:

Discussion

Explore topic-wise InterviewSolutions in .

What is smog ? State its damaging effects.

Substance X present in vinegar reacts with substance Y present in the milk of magnesia. The product obtained from the reaction between X and Y is?

An uncharged atom has a mass number of 7 and contains 2 neutrons, find the number of electrons in it.

31.an electron in an atom A)) moves around its nucleus in definite energy levels B)) has no fixed location around nucleus C)) both are true

Question 23 Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 g. Molar atomic mass of magnesium is 24g mol−1.

Ksp of Mg(OH)2 is 4.0 X 10^-12. The number of moles of Mg 2+ ions in one litre of its saturated solution in 0.1 M NaOH is :1) 4 X 10^-42)1.0X 10^-43)2 X 10^-64) 8.0 X10^-6

Question 3:What happens to Red litmus paper when added to acid and base solution?

There are two charged particles of same nature, and they are fixed. The position of equilibrium for a third charge will be(1) near the smaller fixed charge(2) near the greater fixed charge(3) outside on the line joining two charges(4) none of these

Question 7 (h) Which of the following materials fall in the category of a “pure substance”? h. Wood

Which has highest m.p and b.p covalent or ionic bonds and in solid state it is given that covalent solids has very highest m.p and b.p?

Select the best oxidising agent from the given options

The process by which matter in its solid state changes to gaseous state due to an increase in temperature and/or decrease in pressure is called as ______________.

Symbols for elements Lead and Mercury are, respectively:

13.If sulphuric acid is an ionic compound then why it is formed by sharing of electrons?

Question 5 (a)What is the physical state of water at— (a)25∘C

Activity : take a seringe fill it with simple air close the exit with the help of rubber cork now if we apply a great force and some how gas has changed its state to solid Then to how many exnet would t be a solid and if we remove the cork then what will happen ?

Which type of elements, metals or non-metals, show the property of brittleness ?

1 mole glucose is added to 1 L of water K (H2O)-0.512 K kg mole-1 boiling point of solution will be

The dissociation energy of CH4(g) is 360kcal mol-1 and that of of C2H6 (g) is 620 kcal mol-1.The C-C bond energy ?

In the recent years, a high rate of depletion of ozone is been detected in the –

11.A B ; K1 3B 3C ; K2 D C ; K3 Then find the constant K4 for the reaction A D Note - ( is an equilliburium sign)

A current strength of 96.5 A is passed for 10s through 1L of a solution of 0.01M aqueous CuSO_4 . Calculate the pH of the solution

What is the maximum number of hydrogen atoms required to attain the octet configuration by carbon?

For a reaction, N2(g)+3H2(g) →2NH3 (g), the rate of formation of NH_3 was found to be 2 x 10^{-2} mol/dm3/s. The rate of consumption of N2 will b

The electronegativity of H and Cl are 2.1 and 3.0 respectively .The nature of HCl is

Sulphur and oxygen are known to form two compounds. The sulphur content in one of these is 51% while in the other is 41% . Show that this data is in agreement with the law of multiple proportion? With solution

The subatomic particle which has no charge but mass nearly equal to that of a proton is:

Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a droplets of water around it. Why?

A current of 4 ampere was passed for 1.5 hours through a solution of copper sulphate when 3.2g of copper was deposited.calculate the current effeciency.

The general formula of cyclic alkanes is-

Question 27People usually keep Angethi/burning coal in their closed rooms during winter season. Why is it advised to keep the door open?

How does the nucleus of the atom have protons in a certain place shouldn't they be repelling each other as they are of same charge

The number of electrons in an atom of Fluorine is 9. Its electronic configuration is _______ .

'बालम आवो हमारे गेह रे' में कवि किसका आह्वान कर रहा है और क्यों?

How to find number of p pi -d pi and p pi-p pi bonds in nitrate and phosphate ions ?

How do we obtain bleaching powder?

25.What are anti-ferromagnets?

Burst the bubbles with a correct subtraction equation.

The future you synthesizes a new element. A neutral atom of the element, say 'X', has 4 electrons and 2 neutrons. How will you represent the nucleus of the element in your award winning paper?

How are the formulas are made

Write the uses.a. Anodizingb. Powder coatingc. Radioactive substancesd. Ceramic

Which of the following match of molecules with the type of forces existing between them is not correct A O2(g) - dispersion B HF(l)- hydrogen bonding C HCl(g)- london forces D Cl2 and HCl- dipole induced dipole

The number of mole of KMnO4 reduced by 1 mole of KI in alkaline medium isa)1 b)2 c)5 d)1/5

41. In Wacker oxidation of ethene,product formed is??

Calculate the mass of 3.011×1023 nitrogen molecule.

what is ripened cheese?

What is the formula of zinc sulphites

If we are given any equation on the basis of law of proportion or mass how do we know that whether we have to add or solve by finding out the ratio ? is it that in law of mass heating word would be used in the question ?

In a hydrogen like atom, when an electron jumps from the M−shell to the L−shell, the wavelength of emitted radiation is λ. If an electron jumps from N−shell to the L−shell, the wavelength of emitted radiation will be: