10223 + Interview Questions in Chemistry Page 16 InterviewSolution

751.	4) (A H-Δ υ) for the formation of carbonmonoxide from its elements at 298K
Answer» 4) (A H-Δ υ) for the formation of carbonmonoxide from its elements at 298K

Discussion

752.	8.Why MgO has maximum lattice energy
Answer» 8.Why MgO has maximum lattice energy

Discussion

753.	11. How to number the nitrogeneous bases present in nucleic acids?like what is the criteria?
Answer» 11. How to number the nitrogeneous bases present in nucleic acids?like what is the criteria?

Discussion

754.	What is the difference between vapor and vapour ? Are they the same thing? Why are the spellings different?
Answer» What is the difference between vapor and vapour ? Are they the same thing? Why are the spellings different?

Discussion

755.	An open flask vontains air at 27 ^° C temperature and one atm pressure. The flask is heated to 127^° C at the same pressure. What fraction of the orginal air will remain in the flask
Answer» An open flask vontains air at 27 ^° C temperature and one atm pressure. The flask is heated to 127^° C at the same pressure. What fraction of the orginal air will remain in the flask

Discussion

756.	Draw benzylic alcoholDraw phenolic alcohol
Answer» Draw benzylic alcohol Draw phenolic alcohol

Discussion

757.	HOW TO CONVERT 35DERGREE CELSIUS TO FAHRENHEIT
Answer» HOW TO CONVERT 35DERGREE CELSIUS TO FAHRENHEIT

Discussion

758.	What are ionic and molecular compounds? Give examples.
Answer» What are ionic and molecular compounds? Give examples.

Discussion

759.	What are saturated and unsaturated compounds? Give examples.
Answer» What are saturated and unsaturated compounds? Give examples.

Discussion

760.	What is the valency of Nitrogen in NO2?
Answer» What is the valency of Nitrogen in $N O_{2}$ ?

Discussion

761.	why chemical properties of isotopes are same and physical properties are different?
Answer» why chemical properties of isotopes are same and physical properties are different?

Discussion

762.	Which of the following pair is analogous to each other?
Answer» Which of the following pair is analogous to each other?

Discussion

763.	29. How to calculate energy of an orbital n how energy level shells are filled
Answer» 29. How to calculate energy of an orbital n how energy level shells are filled

Discussion

764.	While boiling water temperature remains constant at 100c till whole of water vapourises .explain
Answer» While boiling water temperature remains constant at 100c till whole of water vapourises .explain

Discussion

765.	RbCl has NaCl type lattice and its unit cell length is 0.30∘A greater than that for KCl. If rk+=1.33∘A, the ionic radius of Rb+ is
Answer» RbCl has NaCl type lattice and its unit cell length is $0.30 \circ A$ greater than that for KCl. If $r_{k +} = 1.33 \circ A$ , the ionic radius of $R b^{+}$ is

Discussion

766.	Why is it said that –(a) Air is a homogeneous mixture of various gases.(b) Water is a universal solvent.(c) There is no alternative to water for cleaning purposes.
Answer» Why is it said that – (a) Air is a homogeneous mixture of various gases. (b) Water is a universal solvent. (c) There is no alternative to water for cleaning purposes.

Discussion

767.	There are 3 boxes. In one box there are only isotopes in the other two boxes there are isotones and isobars. Which of the following boxes contains isotones?
Answer» There are 3 boxes. In one box there are only isotopes in the other two boxes there are isotones and isobars. Which of the following boxes contains isotones?

767.

There are 3 boxes. In one box there are only isotopes in the other two boxes there are isotones and isobars. Which of the following boxes contains isotones?

Answer»

There are 3 boxes. In one box there are only isotopes in the other two boxes there are isotones and isobars. Which of the following boxes contains isotones?

Discussion

768.	LiCl and BCl3 are examples of ___.
Answer» $L i C l$ and $B C l_{3}$ are examples of ___.

Discussion

769.	Sir JJ Thomson discovered a fundamental sub atomic particle called
Answer» Sir JJ Thomson discovered a fundamental sub atomic particle called

Discussion

770.	What is buckminsterfullerene? How is it related to diamond and graphite?
Answer» What is buckminsterfullerene? How is it related to diamond and graphite?

Discussion

771.	Who discovered neutron? What is the contribution of neutron in the mass of an atom?
Answer» Who discovered neutron? What is the contribution of neutron in the mass of an atom?

Discussion

772.	How many moles of Oxygen atoms are present in 88g of CO2? Options: a)2 b)4 c) 3 d)1
Answer» How many moles of Oxygen atoms are present in 88g of CO2? Options: a)2 b)4 c) 3 d)1

Discussion

773.	How can scientists have a belief in the existence of a symmetry between the bosons and fermions?
Answer» How can scientists have a belief in the existence of a symmetry between the bosons and fermions?

Discussion

774.	The most nonmetallic among the given elements is:
Answer» The most nonmetallic among the given elements is:

Discussion

775.	What is the empirical formula for B3N3H6?
Answer» What is the empirical formula for $B_{3} N_{3} H_{6}$ ?

Discussion

776.	'Everything is matter'.Justify the statment with the help of examples.
Answer» 'Everything is matter'.Justify the statment with the help of examples.

Discussion

777.	70.Which compound have more ionic character NaCl or NaF?
Answer» 70.Which compound have more ionic character NaCl or NaF?

Discussion

778.	if 1 at alpha particles are deflected at angle 60 degree then calculate the angle at which 20 alpha particles get deflected
Answer» if 1 at alpha particles are deflected at angle 60 degree then calculate the angle at which 20 alpha particles get deflected

Discussion

779.	The relative density of silver is 10.8. The density of silver is .
Answer» The relative density of silver is 10.8. The density of silver is .

Discussion

780.	The lightest metal in the periodic table -
Answer» The lightest metal in the periodic table -

Discussion

781.	(a) State the various postulates of Dalton's atomic theory of matter.(b) Which postulate of Dalton's atomic theory can explain the law of conservation of mass?
Answer» (a) State the various postulates of Dalton's atomic theory of matter. (b) Which postulate of Dalton's atomic theory can explain the law of conservation of mass?

Discussion

782.	49 Edge length of FCC unit cell of ionic solids is 508 pm , if radii of cation is 110 pm , then calculate radii of anion .
Answer» 49 Edge length of FCC unit cell of ionic solids is 508 pm , if radii of cation is 110 pm , then calculate radii of anion .

Discussion

783.	Which among the following statements are correct for the given redox reaction:Pb3O4(s)+8HCl(aq)Heat−−−→3PbCl2(s)+Cl2(g)+4H2O(l)I. HCl is oxidisedII. HCl is reducedIII. Pb3O4 is reducedIV. Pb3O4 is oxidised
Answer» Which among the following statements are correct for the given redox reaction: $P b_{3} O_{4} (s) + 8 H C l (a q) H e a t - -- \to 3 P b C l_{2} (s) + C l_{2} (g) + 4 H_{2} O (l)$ I. $H C l$ is oxidised II. $H C l$ is reduced III. $P b_{3} O_{4}$ is reduced IV. $P b_{3} O_{4}$ is oxidised

Discussion

784.	(a) Dry hydrogen chloride gas does not turn blue litmus red whereas hydrochloric acid does. Give one reason.(b) An organic compound burns with a sooty flame. Is it a saturated or an unsaturated compound? Give reason.
Answer» (a) Dry hydrogen chloride gas does not turn blue litmus red whereas hydrochloric acid does. Give one reason. (b) An organic compound burns with a sooty flame. Is it a saturated or an unsaturated compound? Give reason.

Discussion

785.	What is the connection between Gay-Lussac's law and Avogadro's law???
Answer» What is the connection between Gay-Lussac's law and Avogadro's law???

Discussion

786.	15. For an equilibrium H2O(s)= H2O(l), where is the reaction proceed if pressure is increased ?Give reason
Answer» 15. For an equilibrium H2O(s)= H2O(l), where is the reaction proceed if pressure is increased ?Give reason

Discussion

787.	Variations of vanderwaals radius
Answer» Variations of vanderwaals radius

Discussion

788.	State the law of conseravtion of mass.
Answer» State the law of conseravtion of mass.

Discussion

789.	The amount of energy released during the combustion of a unit mass of fuel is called____.
Answer» The amount of energy released during the combustion of a unit mass of fuel is called____.

Discussion

790.	Which one of the alkali metals forms only the normal oxide M2O on heating in air?
Answer» Which one of the alkali metals forms only the normal oxide $M_{2} O$ on heating in air?

Discussion

791.	Complete the following reaction: Na2CO3+H2SO4→ ___?
Answer» Complete the following reaction: $N a_{2} C O_{3} + H_{2} S O_{4} \to$ ___?

Discussion

792.	Find the number of amphoteric hydroxide(s) from the following:Be(OH)2, Mg(OH)2, Al(OH)3, LiOH, B(OH)3,
Answer» Find the number of amphoteric hydroxide(s) from the following: $B e (O H)_{2}, M g (O H)_{2}, A l (O H)_{3}, L i O H, B (O H)_{3},$

Discussion

793.	What is the order of basicity of halide ions in polar protic and aprotic solvent respectively?
Answer» What is the order of basicity of halide ions in polar protic and aprotic solvent respectively?

Discussion

794.	Explain what is atomic mass ?
Answer» Explain what is atomic mass ?

Discussion

795.	1.for separating the components of mixture when when do we use fractional distillation as a separation technique give two example .What i s the role of Glass bead packed in the fractionating column
Answer» 1.for separating the components of mixture when when do we use fractional distillation as a separation technique give two example .What i s the role of Glass bead packed in the fractionating column

Discussion

796.	Write a method to separate a mixture of sand and potash alum.
Answer» Write a method to separate a mixture of sand and potash alum.

Discussion

797.

Match the pairs: Group A Group B 1. Proton a. Negative 2. Electron b. Neutral 3. Neutron c. Positive Group A Group B 1. Thomson a. Scattering experiment 2. Rutherford b. Neutrons 3. Chadwick c. Electrons

Answer»

Match the pairs:

Group A		Group B
1.	Proton	a.	Negative
2.	Electron	b.	Neutral
3.	Neutron	c.	Positive

Group A		Group B
1.	Thomson	a.	Scattering experiment
2.	Rutherford	b.	Neutrons
3.	Chadwick	c.	Electrons

Discussion

798.	PROVE MATHEMATICALLY THAT RELATIVE CHARGE ON PROTON RESIDES TO BE + 1, along with brief explanation. plz ,
Answer» PROVE MATHEMATICALLY THAT RELATIVE CHARGE ON PROTON RESIDES TO BE + 1, along with brief explanation. plz ,

Discussion

799.	Which property of a substance checks its purity?
Answer» Which property of a substance checks its purity?

Discussion

800.	Explain the Separation process.
Answer» Explain the Separation process.

Discussion

Explore topic-wise InterviewSolutions in .

4) (A H-Δ υ) for the formation of carbonmonoxide from its elements at 298K

8.Why MgO has maximum lattice energy

11. How to number the nitrogeneous bases present in nucleic acids?like what is the criteria?

What is the difference between vapor and vapour ? Are they the same thing? Why are the spellings different?

An open flask vontains air at 27 ^° C temperature and one atm pressure. The flask is heated to 127^° C at the same pressure. What fraction of the orginal air will remain in the flask

Draw benzylic alcoholDraw phenolic alcohol

HOW TO CONVERT 35DERGREE CELSIUS TO FAHRENHEIT

What are ionic and molecular compounds? Give examples.

What are saturated and unsaturated compounds? Give examples.

What is the valency of Nitrogen in NO2?

why chemical properties of isotopes are same and physical properties are different?

Which of the following pair is analogous to each other?

29. How to calculate energy of an orbital n how energy level shells are filled

While boiling water temperature remains constant at 100c till whole of water vapourises .explain

RbCl has NaCl type lattice and its unit cell length is 0.30∘A greater than that for KCl. If rk+=1.33∘A, the ionic radius of Rb+ is

Why is it said that –(a) Air is a homogeneous mixture of various gases.(b) Water is a universal solvent.(c) There is no alternative to water for cleaning purposes.

There are 3 boxes. In one box there are only isotopes in the other two boxes there are isotones and isobars. Which of the following boxes contains isotones?

LiCl and BCl3 are examples of ___.

Sir JJ Thomson discovered a fundamental sub atomic particle called

What is buckminsterfullerene? How is it related to diamond and graphite?

Who discovered neutron? What is the contribution of neutron in the mass of an atom?

How many moles of Oxygen atoms are present in 88g of CO2? Options: a)2 b)4 c) 3 d)1

How can scientists have a belief in the existence of a symmetry between the bosons and fermions?

The most nonmetallic among the given elements is:

What is the empirical formula for B3N3H6?

'Everything is matter'.Justify the statment with the help of examples.

70.Which compound have more ionic character NaCl or NaF?

if 1 at alpha particles are deflected at angle 60 degree then calculate the angle at which 20 alpha particles get deflected

The relative density of silver is 10.8. The density of silver is .

The lightest metal in the periodic table -

(a) State the various postulates of Dalton's atomic theory of matter.(b) Which postulate of Dalton's atomic theory can explain the law of conservation of mass?

49 Edge length of FCC unit cell of ionic solids is 508 pm , if radii of cation is 110 pm , then calculate radii of anion .

Which among the following statements are correct for the given redox reaction:Pb3O4(s)+8HCl(aq)Heat−−−→3PbCl2(s)+Cl2(g)+4H2O(l)I. HCl is oxidisedII. HCl is reducedIII. Pb3O4 is reducedIV. Pb3O4 is oxidised

(a) Dry hydrogen chloride gas does not turn blue litmus red whereas hydrochloric acid does. Give one reason.(b) An organic compound burns with a sooty flame. Is it a saturated or an unsaturated compound? Give reason.

What is the connection between Gay-Lussac's law and Avogadro's law???

15. For an equilibrium H2O(s)= H2O(l), where is the reaction proceed if pressure is increased ?Give reason

Variations of vanderwaals radius

State the law of conseravtion of mass.

The amount of energy released during the combustion of a unit mass of fuel is called____.

Which one of the alkali metals forms only the normal oxide M2O on heating in air?

Complete the following reaction: Na2CO3+H2SO4→ ___?

Find the number of amphoteric hydroxide(s) from the following:Be(OH)2, Mg(OH)2, Al(OH)3, LiOH, B(OH)3,

What is the order of basicity of halide ions in polar protic and aprotic solvent respectively?

Explain what is atomic mass ?

1.for separating the components of mixture when when do we use fractional distillation as a separation technique give two example .What i s the role of Glass bead packed in the fractionating column

Write a method to separate a mixture of sand and potash alum.

Match the pairs: Group A Group B 1. Proton a. Negative 2. Electron b. Neutral 3. Neutron c. Positive Group A Group B 1. Thomson a. Scattering experiment 2. Rutherford b. Neutrons 3. Chadwick c. Electrons

PROVE MATHEMATICALLY THAT RELATIVE CHARGE ON PROTON RESIDES TO BE + 1, along with brief explanation. plz ,

Which property of a substance checks its purity?

Explain the Separation process.