10223 + Interview Questions in Chemistry Page 11 InterviewSolution

501.	In XeF2,XeF4 and XeF6 total number of lone pair electrons present on Xe are respectively
Answer» In $X e F_{2}, X e F_{4} a n d X e F_{6}$ total number of lone pair electrons present on Xe are respectively

Discussion

502.	How is valency helpful in writing chemical formula? Which one of the following is correct?
Answer» How is valency helpful in writing chemical formula? Which one of the following is correct?

Discussion

503.	Water vapour that condenses and falls down as rain is formed due to ___ of water from water bodies.
Answer» Water vapour that condenses and falls down as rain is formed due to ___ of water from water bodies.

Discussion

504.	Which of the following gases together constitute producer gas?
Answer» Which of the following gases together constitute producer gas?

Discussion

505.	Why CO2 can not bent or angular shape and this compound similar to H2O and we know that H2O is bent shape, So why we can not say that Co2 is also angular shape
Answer» Why CO2 can not bent or angular shape and this compound similar to H2O and we know that H2O is bent shape, So why we can not say that Co2 is also angular shape

Discussion

506.	In laboratory method of preparation,temperature is maintained 2000C because,
Answer» In laboratory method of preparation,temperature is maintained $200^{0} C$ because,

Discussion

507.	Which element has two shells, both of which are completely filled with electrons?
Answer» Which element has two shells, both of which are completely filled with electrons?

Discussion

508.	What is specific conductivity
Answer» What is specific conductivity

Discussion

509.	For which entity Bohr’s model is not applicable?
Answer» For which entity Bohr’s model is not applicable?

Discussion

510.	Does it true that lime is amorphous solid ?a
Answer» Does it true that lime is amorphous solid ?a

Discussion

511.	At constant pressure, the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph.The volume of the gas at 300∘C is larger than that at 0∘C by a factor of
Answer» At constant pressure, the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph. The volume of the gas at 300 $^{\circ}$ C is larger than that at 0 $^{\circ}$ C by a factor of

511.

At constant pressure, the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph.The volume of the gas at 300∘C is larger than that at 0∘C by a factor of

Answer»

At constant pressure, the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph.

The volume of the gas at 300 $^{\circ}$ C is larger than that at 0 $^{\circ}$ C by a factor of

Discussion

512.	MnO2+4HCl→MnCl2+2H2O+Cl2 In the above reaction, Mn is reduced and Cl is oxidised. Such reactions in which both oxidation and reduction takes place is called __________ reaction.
Answer» $M n O_{2} + 4 H C l \to M n C l_{2} + 2 H_{2} O + C l_{2}$ In the above reaction, Mn is reduced and Cl is oxidised. Such reactions in which both oxidation and reduction takes place is called __________ reaction.

512.

MnO2+4HCl→MnCl2+2H2O+Cl2 In the above reaction, Mn is reduced and Cl is oxidised. Such reactions in which both oxidation and reduction takes place is called __________ reaction.

Answer»

$M n O_{2} + 4 H C l \to M n C l_{2} + 2 H_{2} O + C l_{2}$

In the above reaction, Mn is reduced and Cl is oxidised. Such reactions in which both oxidation and reduction takes place is called __________ reaction.

Discussion

513.	In which pair of ions, both the species contain a S-S bond?
Answer» In which pair of ions, both the species contain a S-S bond?

Discussion

514.	Dry hydrogen when passed over a heated metals like Na, K and Ca, reacts to give their corresponding _______ .
Answer» Dry hydrogen when passed over a heated metals like Na, K and Ca, reacts to give their corresponding _______ .

Discussion

515.	Name one metal when placed in ferrous sulphate solution will discharge its green colour. Write a chemical equation and state the reasons also. [3 MARKS]
Answer» Name one metal when placed in ferrous sulphate solution will discharge its green colour. Write a chemical equation and state the reasons also. [3 MARKS]

Discussion

516.	When beryllium is bombarded with α - particles, extremely penetrating radiations which cannot be deflected by electrical or magnetic field are given out. These are
Answer» When beryllium is bombarded with $α$ - particles, extremely penetrating radiations which cannot be deflected by electrical or magnetic field are given out. These are

Discussion

517.	For a hypothetical reaction A2+B2 gives 2AB and deltaG and DeltaS are 20KJ and -20Jk-1 mol-1 respect to 200 Kelvin if deltaCp is 20jk-1mol-1 deltaH at 400 kelvin
Answer» For a hypothetical reaction A2+B2 gives 2AB and deltaG and DeltaS are 20KJ and -20Jk-1 mol-1 respect to 200 Kelvin if deltaCp is 20jk-1mol-1 deltaH at 400 kelvin

Discussion

518.	Newman projections P, Q, R and S are shown below:Which one of the following options represents identical molecules?
Answer» Newman projections P, Q, R and S are shown below: Which one of the following options represents identical molecules?

Discussion

519.	dy/dx , if y= sec[(a+bx)^(1/2)]
Answer» dy/dx , if y= sec[(a+bx)^(1/2)]

Discussion

520.	The ratio of mass of a molecule of X2 to that silver atom is 8 ratio 27 if the molar mass of silver is 108 gram identify the element x
Answer» The ratio of mass of a molecule of X2 to that silver atom is 8 ratio 27 if the molar mass of silver is 108 gram identify the element x

Discussion

521.	Deduce the number of molecules of the following compounds in the given quantities.32g oxygen, 90g water, 8.8g carbon dioxide, 7.1g chlorine.
Answer» Deduce the number of molecules of the following compounds in the given quantities. 32g oxygen, 90g water, 8.8g carbon dioxide, 7.1g chlorine.

Discussion

522.	Give reasons : (a) Water is used as a cooling agent. (b) Water pipes burst in severe winters. (c) It is difficult to cook in hills as compared to plains. (d) Ice floats on water. (e) Sea water does not freeze at 0∘C.
Answer» Give reasons : (a) Water is used as a cooling agent. (b) Water pipes burst in severe winters. (c) It is difficult to cook in hills as compared to plains. (d) Ice floats on water. (e) Sea water does not freeze at 0 $^{\circ}$ C.

522.

Give reasons : (a) Water is used as a cooling agent. (b) Water pipes burst in severe winters. (c) It is difficult to cook in hills as compared to plains. (d) Ice floats on water. (e) Sea water does not freeze at 0∘C.

Answer»

Give reasons :

(a) Water is used as a cooling agent.

(b) Water pipes burst in severe winters.

(c) It is difficult to cook in hills as compared to plains.

(d) Ice floats on water.

(e) Sea water does not freeze at 0 $^{\circ}$ C.

Discussion

523.	Identify which of these are basic: (i) CaCO3 (ii) NaHCO3 (iii) NH3 (iv) KOH (v) MgCl2
Answer» Identify which of these are basic: (i) $C a C O_{3}$ (ii) $N a H C O_{3}$ (iii) $N H_{3}$ (iv) $K O H$ (v) $M g C l_{2}$

Discussion

524.	List the points of similarities between heterogeneous and homogeneous mixtures
Answer» List the points of similarities between heterogeneous and homogeneous mixtures

Discussion

525.	Find the alkyne among all the other alkanes in the given options.
Answer» Find the alkyne among all the other alkanes in the given options.

Discussion

526.	The atomic species A and B have different number of protons but the same number of nucleons. On the other hand, the atomic species X and Y have the same number of protons but different number of nucleons. Which pair is an example of isobars ? Why ?
Answer» The atomic species A and B have different number of protons but the same number of nucleons. On the other hand, the atomic species X and Y have the same number of protons but different number of nucleons. Which pair is an example of isobars ? Why ?

Discussion

527.	Radius of Bohr's orbit of hydrogen atom is
Answer» Radius of Bohr's orbit of hydrogen atom is

Discussion

528.	1. Four expressions for an electrostatic field appear below:Select the incorrect one (E in N/C, x, y, z in m) (1) E=3i+4j+5k (2) E xi+yj+ zk (3) E= y^2 i + z^2 j +x^2 k (4) E=yzi+ xzj + xyk
Answer» 1. Four expressions for an electrostatic field appear below:Select the incorrect one (E in N/C, x, y, z in m) (1) E=3i+4j+5k (2) E xi+yj+ zk (3) E= y^2 i + z^2 j +x^2 k (4) E=yzi+ xzj + xyk

Discussion

529.	If the maximum number of electrons in the 3rd shell is 18 according to 2n square rule,then why is the electronic configuration of potassium as 2,8,8,1 and not 2,8,9,?
Answer» If the maximum number of electrons in the 3rd shell is 18 according to 2n square rule,then why is the electronic configuration of potassium as 2,8,8,1 and not 2,8,9,?

Discussion

530.	A substance 'A' does not dissociate completely into its ions in the aqueous solutions. It is bitter in taste and soapy to touch. Identify the substance A.
Answer» A substance 'A' does not dissociate completely into its ions in the aqueous solutions. It is bitter in taste and soapy to touch. Identify the substance A.

Discussion

531.	A student purchases common salt from the market which is contaminated with ammonium chloride (NH4Cl ). Identify the technique that he should adopt to obtain pure NaCl.
Answer» A student purchases common salt from the market which is contaminated with ammonium chloride ( ${N H}_{4} C l$ ). Identify the technique that he should adopt to obtain pure NaCl.

Discussion

532.	how many molecules of O_{2 }are present in 1L air containing 80% volume of O_{2 }at STP
Answer» how many molecules of O_{2 }are present in 1L air containing 80% volume of O_{2 }at STP

Discussion

533.	The best evidence for the existence and movement of particles in liquids was provided by: (a) John Dalton (b) Ernest Rutherford (c) J.J. Thomson (d) Robert Brown
Answer» The best evidence for the existence and movement of particles in liquids was provided by: (a) John Dalton (b) Ernest Rutherford (c) J.J. Thomson (d) Robert Brown

533.

The best evidence for the existence and movement of particles in liquids was provided by: (a) John Dalton (b) Ernest Rutherford (c) J.J. Thomson (d) Robert Brown

Answer»

The best evidence for the existence and movement of particles in liquids was provided by:

(a) John Dalton (b) Ernest Rutherford (c) J.J. Thomson (d) Robert Brown

Discussion

534.	Write a brief note on protons.
Answer» Write a brief note on protons.

Discussion

535.	wht is saturated vapour pressure
Answer» wht is saturated vapour pressure

Discussion

536.	Atoms having same atomic number and different mass numbers are known as __.
Answer» Atoms having same atomic number and different mass numbers are known as __.

Discussion

537.	0.0833 moles of carbohydrate of empirical formula ch2o contain 1 gram of hydrogen the molecular formula of carbohydrate is
Answer» 0.0833 moles of carbohydrate of empirical formula ch2o contain 1 gram of hydrogen the molecular formula of carbohydrate is

Discussion

538.	The conductivity of saturated solution of silver chloride is 1.24×10^6 S/cm. The ionic conductivity of Ag+ and Cl- at infinite dilution are 53.8 and 65.3 Scmsq/mol. Calculate the solubility of AgCl in gram per litre(g/lt).
Answer» The conductivity of saturated solution of silver chloride is 1.24×10^6 S/cm. The ionic conductivity of Ag+ and Cl- at infinite dilution are 53.8 and 65.3 Scmsq/mol. Calculate the solubility of AgCl in gram per litre(g/lt).

Discussion

539.	43 Which one is more acidic and why? 1) Formic acid 2) Phenyl acetic acid
Answer» 43 Which one is more acidic and why? 1) Formic acid 2) Phenyl acetic acid

Discussion

540.	A binary solid A+Bhai a structure with B-ions constituting the lattice and A+ions occupying 25%tetrahedral holes. Formula of the solid is
Answer» A binary solid A+Bhai a structure with B-ions constituting the lattice and A+ions occupying 25%tetrahedral holes. Formula of the solid is

Discussion

541.	The following statements regarding characteristic of carbon dioxide (CO2) are true except that it is:
Answer» The following statements regarding characteristic of carbon dioxide $(C O_{2})$ are true except that it is:

Discussion

542.	A solution has a pH value of 2. It can be concluded that the given solution is _______ in nature.
Answer» A solution has a pH value of 2. It can be concluded that the given solution is _______ in nature.

Discussion

543.	What is the atomicity of carbon? Explain.
Answer» What is the atomicity of carbon? Explain.

Discussion

544.	What is meant by electrolysis of water?
Answer» What is meant by electrolysis of water?

Discussion

545.	50. How to find valency of an element by its atomic number?
Answer» 50. How to find valency of an element by its atomic number?

Discussion

546.	Why does co2 have 3 resonating structures of 2pi bonds have to be distributed to 2 places (each place will have 1pi bond )?Co2 should not have any resonating structures ?
Answer» Why does co2 have 3 resonating structures of 2pi bonds have to be distributed to 2 places (each place will have 1pi bond )? Co2 should not have any resonating structures ?

Discussion

547.	Question 29The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth (5.98×1024kg). which one of the two is heavier and by how many times?
Answer» Question 29 The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth $(5.98 \times 10^{24} k g)$ . which one of the two is heavier and by how many times?

Discussion

548.	Mond process is used for refining:
Answer» Mond process is used for refining:

Discussion

549.	26g of an element contains 3 x 10²² atoms,calculatea)Gram Atomic mass b)No. Of nucleons in 200 g of element
Answer» 26g of an element contains 3 x 10²² atoms,calculate a)Gram Atomic mass b)No. Of nucleons in 200 g of element

Discussion

550.	Will ionic radius increase or decrease across a period and why?
Answer» Will ionic radius increase or decrease across a period and why?

Discussion

Explore topic-wise InterviewSolutions in .

In XeF2,XeF4 and XeF6 total number of lone pair electrons present on Xe are respectively

How is valency helpful in writing chemical formula? Which one of the following is correct?

Water vapour that condenses and falls down as rain is formed due to ___ of water from water bodies.

Which of the following gases together constitute producer gas?

Why CO2 can not bent or angular shape and this compound similar to H2O and we know that H2O is bent shape, So why we can not say that Co2 is also angular shape

In laboratory method of preparation,temperature is maintained 2000C because,

Which element has two shells, both of which are completely filled with electrons?

What is specific conductivity

For which entity Bohr’s model is not applicable?

Does it true that lime is amorphous solid ?a

At constant pressure, the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph.The volume of the gas at 300∘C is larger than that at 0∘C by a factor of

MnO2+4HCl→MnCl2+2H2O+Cl2 In the above reaction, Mn is reduced and Cl is oxidised. Such reactions in which both oxidation and reduction takes place is called __________ reaction.

In which pair of ions, both the species contain a S-S bond?

Dry hydrogen when passed over a heated metals like Na, K and Ca, reacts to give their corresponding _______ .

Name one metal when placed in ferrous sulphate solution will discharge its green colour. Write a chemical equation and state the reasons also. [3 MARKS]

When beryllium is bombarded with α - particles, extremely penetrating radiations which cannot be deflected by electrical or magnetic field are given out. These are

For a hypothetical reaction A2+B2 gives 2AB and deltaG and DeltaS are 20KJ and -20Jk-1 mol-1 respect to 200 Kelvin if deltaCp is 20jk-1mol-1 deltaH at 400 kelvin

Newman projections P, Q, R and S are shown below:Which one of the following options represents identical molecules?

dy/dx , if y= sec[(a+bx)^(1/2)]

The ratio of mass of a molecule of X2 to that silver atom is 8 ratio 27 if the molar mass of silver is 108 gram identify the element x

Deduce the number of molecules of the following compounds in the given quantities.32g oxygen, 90g water, 8.8g carbon dioxide, 7.1g chlorine.

Give reasons : (a) Water is used as a cooling agent. (b) Water pipes burst in severe winters. (c) It is difficult to cook in hills as compared to plains. (d) Ice floats on water. (e) Sea water does not freeze at 0∘C.

Identify which of these are basic: (i) CaCO3 (ii) NaHCO3 (iii) NH3 (iv) KOH (v) MgCl2

List the points of similarities between heterogeneous and homogeneous mixtures

Find the alkyne among all the other alkanes in the given options.

The atomic species A and B have different number of protons but the same number of nucleons. On the other hand, the atomic species X and Y have the same number of protons but different number of nucleons. Which pair is an example of isobars ? Why ?

Radius of Bohr's orbit of hydrogen atom is

1. Four expressions for an electrostatic field appear below:Select the incorrect one (E in N/C, x, y, z in m) (1) E=3i+4j+5k (2) E xi+yj+ zk (3) E= y^2 i + z^2 j +x^2 k (4) E=yzi+ xzj + xyk

If the maximum number of electrons in the 3rd shell is 18 according to 2n square rule,then why is the electronic configuration of potassium as 2,8,8,1 and not 2,8,9,?

A substance 'A' does not dissociate completely into its ions in the aqueous solutions. It is bitter in taste and soapy to touch. Identify the substance A.

A student purchases common salt from the market which is contaminated with ammonium chloride (NH4Cl ). Identify the technique that he should adopt to obtain pure NaCl.

how many molecules of O_{2 }are present in 1L air containing 80% volume of O_{2 }at STP

The best evidence for the existence and movement of particles in liquids was provided by: (a) John Dalton (b) Ernest Rutherford (c) J.J. Thomson (d) Robert Brown

Write a brief note on protons.

wht is saturated vapour pressure

Atoms having same atomic number and different mass numbers are known as __.

0.0833 moles of carbohydrate of empirical formula ch2o contain 1 gram of hydrogen the molecular formula of carbohydrate is

The conductivity of saturated solution of silver chloride is 1.24×10^6 S/cm. The ionic conductivity of Ag+ and Cl- at infinite dilution are 53.8 and 65.3 Scmsq/mol. Calculate the solubility of AgCl in gram per litre(g/lt).

43 Which one is more acidic and why? 1) Formic acid 2) Phenyl acetic acid

A binary solid A+Bhai a structure with B-ions constituting the lattice and A+ions occupying 25%tetrahedral holes. Formula of the solid is

The following statements regarding characteristic of carbon dioxide (CO2) are true except that it is:

A solution has a pH value of 2. It can be concluded that the given solution is _______ in nature.

What is the atomicity of carbon? Explain.

What is meant by electrolysis of water?

50. How to find valency of an element by its atomic number?

Why does co2 have 3 resonating structures of 2pi bonds have to be distributed to 2 places (each place will have 1pi bond )?Co2 should not have any resonating structures ?

Question 29The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth (5.98×1024kg). which one of the two is heavier and by how many times?

Mond process is used for refining:

26g of an element contains 3 x 10²² atoms,calculatea)Gram Atomic mass b)No. Of nucleons in 200 g of element

Will ionic radius increase or decrease across a period and why?