10223 + Interview Questions in Chemistry Page 6 InterviewSolution

251.	Which one of the following methods is used to separate cream from milk?
Answer» Which one of the following methods is used to separate cream from milk?

Discussion

252.	What is Granum in L.S.
Answer» What is Granum in L.S.

Discussion

253.	17. The alkali metals from salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders ? [AIPMT (Prelims)-2008] (1) LiH > NaH > KH > RbH > CsH (2) CsH > RbH > KH > NaH > LiH (3) KH > NaH > LiH > CsH > RbH (4) NaH > LiH > KH > RbH > CsH
Answer» 17. The alkali metals from salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders ? [AIPMT (Prelims)-2008] (1) LiH > NaH > KH > RbH > CsH (2) CsH > RbH > KH > NaH > LiH (3) KH > NaH > LiH > CsH > RbH (4) NaH > LiH > KH > RbH > CsH

Discussion

254.	The mass of BaCO3 produced when excess CO2 is bubbled through a solution of 0.205 mol Ba (OH)2 is
Answer» The mass of BaCO3 produced when excess CO2 is bubbled through a solution of 0.205 mol Ba (OH)2 is

Discussion

255.	Which of the following metals, in reaction with acids like HCl, do not form bubbles in the solution?
Answer» Which of the following metals, in reaction with acids like HCl, do not form bubbles in the solution?

Discussion

256.	Three mixtures A, B and C are obtained by stirring three different solids in water taken in separate beakers. When mixture A is allowed to stand for some time, then its particles settle at the bottom of the beaker. When a Beam of light is passed through mixture A in a dark room, the path of light becomes visible when observed from the side of the beaker. When mixture B is allowed to stand for a considerable time, even then its particles do not settle down. Mixture B, however, scatters the beam of light just like mixture A. The particles of mixture C do not settle down on keeping and it also does not scatter a beam of light passing through it (a) What are the mixtures like A known as ? (b) What are the mixtures like B known as ? (c) What are the mixtures like C known as ? (d) Name the phenomenon exhibited by A and B which occurs on passing a beam of light through them (e) Name one mixture each which is like (i) A (ii) B, and (iii) C.
Answer» Three mixtures A, B and C are obtained by stirring three different solids in water taken in separate beakers. When mixture A is allowed to stand for some time, then its particles settle at the bottom of the beaker. When a Beam of light is passed through mixture A in a dark room, the path of light becomes visible when observed from the side of the beaker. When mixture B is allowed to stand for a considerable time, even then its particles do not settle down. Mixture B, however, scatters the beam of light just like mixture A. The particles of mixture C do not settle down on keeping and it also does not scatter a beam of light passing through it (a) What are the mixtures like A known as ? (b) What are the mixtures like B known as ? (c) What are the mixtures like C known as ? (d) Name the phenomenon exhibited by A and B which occurs on passing a beam of light through them (e) Name one mixture each which is like (i) A (ii) B, and (iii) C.

256.

Three mixtures A, B and C are obtained by stirring three different solids in water taken in separate beakers. When mixture A is allowed to stand for some time, then its particles settle at the bottom of the beaker. When a Beam of light is passed through mixture A in a dark room, the path of light becomes visible when observed from the side of the beaker. When mixture B is allowed to stand for a considerable time, even then its particles do not settle down. Mixture B, however, scatters the beam of light just like mixture A. The particles of mixture C do not settle down on keeping and it also does not scatter a beam of light passing through it (a) What are the mixtures like A known as ? (b) What are the mixtures like B known as ? (c) What are the mixtures like C known as ? (d) Name the phenomenon exhibited by A and B which occurs on passing a beam of light through them (e) Name one mixture each which is like (i) A (ii) B, and (iii) C.

Answer»

Three mixtures A, B and C are obtained by stirring three different solids in water taken in separate beakers. When mixture A is allowed to stand for some time, then its particles settle at the bottom of the beaker. When a Beam of light is passed through mixture A in a dark room, the path of light becomes visible when observed from the side of the beaker. When mixture B is allowed to stand for a considerable time, even then its particles do not settle down. Mixture B, however, scatters the beam of light just like mixture A. The particles of mixture C do not settle down on keeping and it also does not scatter a beam of light passing through it

(a) What are the mixtures like A known as ?

(b) What are the mixtures like B known as ?

(c) What are the mixtures like C known as ?

(d) Name the phenomenon exhibited by A and B which occurs on passing a beam of light through them

(e) Name one mixture each which is like (i) A (ii) B, and (iii) C.

Discussion

257.	Which set of quantum numbers is not possible A. N=3,l=2,m=0,s=-1/2B. N=4,l=4,m=+3,s=+1/2C. N=3,l=1,m=-2,s=-1/2D. N=2,l=0,m=0,s=+1/2
Answer» Which set of quantum numbers is not possible A. N=3,l=2,m=0,s=-1/2 B. N=4,l=4,m=+3,s=+1/2 C. N=3,l=1,m=-2,s=-1/2 D. N=2,l=0,m=0,s=+1/2

Discussion

258.	How many set of quantum numbers will be there in an atom, which contains total six electrons?
Answer» How many set of quantum numbers will be there in an atom, which contains total six electrons?

Discussion

259.	What is the neutral value in the pH scale at all temperatures?
Answer» What is the neutral value in the pH scale at all temperatures?

Discussion

260.	What is the positive charge on the nucleus of an atom due to?
Answer» What is the positive charge on the nucleus of an atom due to?

Discussion

261.	Calculate the total number of elements in group 8 to group 10
Answer» Calculate the total number of elements in group 8 to group 10

Discussion

262.	Select the correct statement(s).
Answer» Select the correct statement(s).

Discussion

263.	Mole fraction of solute in aqueous solution of 30%NAOH is(1) 0.16(2) 0.05(3) 0.25(4) 0.95
Answer» Mole fraction of solute in aqueous solution of 30%NAOH is(1) 0.16(2) 0.05(3) 0.25(4) 0.95

Discussion

264.	Why is the smell of the perfume of incense stick filled the whole room in few minutes, when lighted ?
Answer» Why is the smell of the perfume of incense stick filled the whole room in few minutes, when lighted ?

Discussion

265.	Paper can easily change its shape on folding it and it can easily be torn still it is called a solid
Answer» Paper can easily change its shape on folding it and it can easily be torn still it is called a solid

Discussion

266.	A beam of cathode rays is subjected to cross electric (E) and magnetic field (B) . the field are adjusted such that the beam is not deflected. the specific charge of the cathode rays is given b
Answer» A beam of cathode rays is subjected to cross electric (E) and magnetic field (B) . the field are adjusted such that the beam is not deflected. the specific charge of the cathode rays is given b

Discussion

267.	Differentiate between temporary and permanent hard water.
Answer» Differentiate between temporary and permanent hard water.

Discussion

268.	.Describe the Clover leaf model of tRNA .
Answer» .Describe the Clover leaf model of tRNA .

Discussion

269.	Question 5 (a) Give the names of the elements present in the following compounds: (a) Quick lime
Answer» Question 5 (a) Give the names of the elements present in the following compounds: (a) Quick lime

Discussion

270.	Difference between Compound and Mixtures.
Answer» Difference between Compound and Mixtures.

Discussion

271.	Oxidation state of F in Fe3O4
Answer» Oxidation state of F in Fe3O4

Discussion

272.	Find the molecular masses of the following compounds:Sulphuric Acid (H2SO4), PotassiumNitrate (KNO3)Hydrogen Sulphide (H2S) Carbon Dioxide (CO2)(Atomic Masses: H = I, S = 32, C = 12, O = 16, K = 40, N = 14)
Answer» Find the molecular masses of the following compounds: Sulphuric Acid (H₂SO₄), PotassiumNitrate (KNO₃) Hydrogen Sulphide (H₂S) Carbon Dioxide (CO₂) (Atomic Masses: H = I, S = 32, C = 12, O = 16, K = 40, N = 14)

272.

Find the molecular masses of the following compounds:Sulphuric Acid (H2SO4), PotassiumNitrate (KNO3)Hydrogen Sulphide (H2S) Carbon Dioxide (CO2)(Atomic Masses: H = I, S = 32, C = 12, O = 16, K = 40, N = 14)

Answer»

Find the molecular masses of the following compounds:

Sulphuric Acid (H₂SO₄), PotassiumNitrate (KNO₃)

Hydrogen Sulphide (H₂S) Carbon Dioxide (CO₂)

(Atomic Masses: H = I, S = 32, C = 12, O = 16, K = 40, N = 14)

Discussion

273.	CaO and CO2 are produced by heating CaCO3. What are the type of the reaction and the process?
Answer» CaO and $C O_{2}$ are produced by heating $C a C O_{3}$ . What are the type of the reaction and the process?

Discussion

274.	the correct set of four quantum number for the valence electron of potassium is atomic no of K=19
Answer» the correct set of four quantum number for the valence electron of potassium is atomic no of K=19

Discussion

275.	Which of the following particles are present in the nucleus of a helium atom?
Answer» Which of the following particles are present in the nucleus of a helium atom?

Discussion

276.	What happens when ammonia gas is reacted with red hot copper oxide
Answer» What happens when ammonia gas is reacted with red hot copper oxide

Discussion

277.	A small piece of calcium metal is put into a small trough containing water. There is effervescence and white turbidity is formed. (a) Name the gas formed in the reaction. How would you test the gas ? (b) Write an equation for the reaction. (c) What do you observe when a few drops of red litmus solution are added to the turbid solution ?
Answer» A small piece of calcium metal is put into a small trough containing water. There is effervescence and white turbidity is formed. (a) Name the gas formed in the reaction. How would you test the gas ? (b) Write an equation for the reaction. (c) What do you observe when a few drops of red litmus solution are added to the turbid solution ?

277.

A small piece of calcium metal is put into a small trough containing water. There is effervescence and white turbidity is formed. (a) Name the gas formed in the reaction. How would you test the gas ? (b) Write an equation for the reaction. (c) What do you observe when a few drops of red litmus solution are added to the turbid solution ?

Answer»

A small piece of calcium metal is put into a small trough containing water. There is effervescence and white turbidity is formed.

(a) Name the gas formed in the reaction. How would you test the gas ?

(b) Write an equation for the reaction.

(c) What do you observe when a few drops of red litmus solution are added to the turbid solution ?

Discussion

278.	The constituents of a certain substance cannot be separated by any physical means, but when heated, this substance releases a certain gas. When the evolved gas is passed through lime water, it turns milky. This indicates that the given substance is a__i__, and the product obtained in the test tube is__ii__. Which row completes the given statement?
Answer» The constituents of a certain substance cannot be separated by any physical means, but when heated, this substance releases a certain gas. When the evolved gas is passed through lime water, it turns milky. This indicates that the given substance is a__i__, and the product obtained in the test tube is__ii__. Which row completes the given statement?

278.

The constituents of a certain substance cannot be separated by any physical means, but when heated, this substance releases a certain gas. When the evolved gas is passed through lime water, it turns milky. This indicates that the given substance is ai, and the product obtained in the test tube isii. Which row completes the given statement?

Answer»

The constituents of a certain substance cannot be separated by any physical means, but when heated, this substance releases a certain gas. When the evolved gas is passed through lime water, it turns milky.

This indicates that the given substance is a__i__, and the product obtained in the test tube is__ii__.

Which row completes the given statement?

Discussion

279.	13.Graph of step of-x
Answer» 13.Graph of step of-x

Discussion

280.	What determines the number of positive charges on the nucleus?
Answer» What determines the number of positive charges on the nucleus?

Discussion

281.	(1) Define atomic mass unit.(2) Arrange the following elements in the increasing order of their atomic masses: Ca, Mg, C, He.
Answer» (1) Define atomic mass unit. (2) Arrange the following elements in the increasing order of their atomic masses: Ca, Mg, C, He.

Discussion

282.	The ratio of mass of an electron to that of mass of hydrogen atom is
Answer» The ratio of mass of an electron to that of mass of hydrogen atom is

Discussion

283.	An α-particle (mass 4 amu) and a singly charged sulfur ion (mass 32 amu) are initially at rest. They are accelerated through a potential V and then allowed to pass into a region of uniform magnetic field which is normal to the velocities of the particles. Within this region, the α-particle and the sulfur ion move in circular orbits of radii rα and rs, respectively. The ratio of rsrα is
Answer» An $α$ -particle (mass $4$ amu) and a singly charged sulfur ion (mass $32$ amu) are initially at rest. They are accelerated through a potential $V$ and then allowed to pass into a region of uniform magnetic field which is normal to the velocities of the particles. Within this region, the $α$ -particle and the sulfur ion move in circular orbits of radii $r_{α}$ and $r_{s}$ , respectively. The ratio of $\frac{r_{s}}{r_{α}}$ is

Discussion

284.	What is the colour of sodium sulphate formed due to the reaction of zinc sulphate with sodium hydroxide?
Answer» What is the colour of sodium sulphate formed due to the reaction of zinc sulphate with sodium hydroxide?

Discussion

285.	Arrange the following metals in the decreasing order of their reactivity.
Answer» Arrange the following metals in the decreasing order of their reactivity.

Discussion

286.	13. How to find the n-factor of double salt with proper explanation. K2SO4. Al2(SO4)3. 24H2O
Answer» 13. How to find the n-factor of double salt with proper explanation. K2SO4. Al2(SO4)3. 24H2O

Discussion

287.	Good evening mentor do all elements labelled in periodic table have exactly one electron in the outermost energy level or shell Thank you
Answer» Good evening mentor do all elements labelled in periodic table have exactly one electron in the outermost energy level or shell Thank you

Discussion

288.	98.How many atoms are present in 120 amu calcium
Answer» 98.How many atoms are present in 120 amu calcium

Discussion

289.	40ml of CO is exploded with 60ml of O2 at constant temperature and pressure. Final Volume of the gases in ml will be
Answer» 40ml of CO is exploded with 60ml of O2 at constant temperature and pressure. Final Volume of the gases in ml will be

Discussion

290.	44. How to find that whether given reaction is double displacement reaction or redox reaction
Answer» 44. How to find that whether given reaction is double displacement reaction or redox reaction

Discussion

291.	Name the unit in which the radius of an atom is usually expressed.
Answer» Name the unit in which the radius of an atom is usually expressed.

Discussion

292.	4 one litre flasks are separately filled with the gases, O2,F2,CH4 and CO2 under the same condition of temperature and pressure. The ratio of number of molecules in these gases is:
Answer» $4$ one litre flasks are separately filled with the gases, $O_{2}, F_{2}, C H_{4}$ and $C O_{2}$ under the same condition of temperature and pressure. The ratio of number of molecules in these gases is:

Discussion

293.	let the mass of electron is two times mass of proton is 1/4th and mass of neutron is 3/2 of the original mass.then atomic weight of C_6^{12} atom
Answer» let the mass of electron is two times mass of proton is 1/4th and mass of neutron is 3/2 of the original mass.then atomic weight of C_6^{12} atom

Discussion

294.	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

295.	An element Y is made up of 15 electrons and 16 neutrons. Which of the following is the correct symbolic representation of the element?
Answer» An element Y is made up of 15 electrons and 16 neutrons. Which of the following is the correct symbolic representation of the element?

Discussion

296.	What is the boiling point of 1 molal aqueous solution of NaCI \lbrack K, 0.52 K molal-\rbrack(1) 99.48^° C(3) 100.52^° C(2) 98.96^° C(4) 101.04 C
Answer» What is the boiling point of 1 molal aqueous solution of NaCI \lbrack K, 0.52 K molal-\rbrack(1) 99.48^° C(3) 100.52^° C(2) 98.96^° C(4) 101.04 C

Discussion

297.	57.Nacl,Mgcl2 and Alcl3 are used as electrolytes in three different cell connected in series.If 3F charge is passed ,the ratio equivalents of Na,Mg and Al deposited on respectively cathodes will be
Answer» 57.Nacl,Mgcl2 and Alcl3 are used as electrolytes in three different cell connected in series.If 3F charge is passed ,the ratio equivalents of Na,Mg and Al deposited on respectively cathodes will be

Discussion

298.	Q. For gaseous reaction: SO2 +1/2 O2 ----> SO3, if the volume of SO2 is 10L, then what volume of O2 is required ? How to solve it?
Answer» Q. For gaseous reaction: SO2 +1/2 O2 ----> SO3, if the volume of SO2 is 10L, then what volume of O2 is required ? How to solve it?

Discussion

299.	The percentage of carbon in ethanoic acid (CH3COOH) is
Answer» The percentage of carbon in ethanoic acid $(C H_{3} C O O H)$ is

Discussion

300.	26.why is it not safe to keep vinegar in copper vessels?but copper cannot displace H+ ion of acids since it is lower in the reactivity series .
Answer» 26.why is it not safe to keep vinegar in copper vessels?but copper cannot displace H+ ion of acids since it is lower in the reactivity series .

Discussion

Explore topic-wise InterviewSolutions in .

Which one of the following methods is used to separate cream from milk?

What is Granum in L.S.

The mass of BaCO3 produced when excess CO2 is bubbled through a solution of 0.205 mol Ba (OH)2 is

Which of the following metals, in reaction with acids like HCl, do not form bubbles in the solution?

Which set of quantum numbers is not possible A. N=3,l=2,m=0,s=-1/2B. N=4,l=4,m=+3,s=+1/2C. N=3,l=1,m=-2,s=-1/2D. N=2,l=0,m=0,s=+1/2

How many set of quantum numbers will be there in an atom, which contains total six electrons?

What is the neutral value in the pH scale at all temperatures?

What is the positive charge on the nucleus of an atom due to?

Calculate the total number of elements in group 8 to group 10

Select the correct statement(s).

Mole fraction of solute in aqueous solution of 30%NAOH is(1) 0.16(2) 0.05(3) 0.25(4) 0.95

Why is the smell of the perfume of incense stick filled the whole room in few minutes, when lighted ?

Paper can easily change its shape on folding it and it can easily be torn still it is called a solid

A beam of cathode rays is subjected to cross electric (E) and magnetic field (B) . the field are adjusted such that the beam is not deflected. the specific charge of the cathode rays is given b

Differentiate between temporary and permanent hard water.

.Describe the Clover leaf model of tRNA .

Question 5 (a) Give the names of the elements present in the following compounds: (a) Quick lime

Difference between Compound and Mixtures.

Oxidation state of F in Fe3O4

Find the molecular masses of the following compounds:Sulphuric Acid (H2SO4), PotassiumNitrate (KNO3)Hydrogen Sulphide (H2S) Carbon Dioxide (CO2)(Atomic Masses: H = I, S = 32, C = 12, O = 16, K = 40, N = 14)

CaO and CO2 are produced by heating CaCO3. What are the type of the reaction and the process?

the correct set of four quantum number for the valence electron of potassium is atomic no of K=19

Which of the following particles are present in the nucleus of a helium atom?

What happens when ammonia gas is reacted with red hot copper oxide

13.Graph of step of-x

What determines the number of positive charges on the nucleus?

(1) Define atomic mass unit.(2) Arrange the following elements in the increasing order of their atomic masses: Ca, Mg, C, He.

The ratio of mass of an electron to that of mass of hydrogen atom is

What is the colour of sodium sulphate formed due to the reaction of zinc sulphate with sodium hydroxide?

Arrange the following metals in the decreasing order of their reactivity.

13. How to find the n-factor of double salt with proper explanation. K2SO4. Al2(SO4)3. 24H2O

Good evening mentor do all elements labelled in periodic table have exactly one electron in the outermost energy level or shell Thank you

98.How many atoms are present in 120 amu calcium

40ml of CO is exploded with 60ml of O2 at constant temperature and pressure. Final Volume of the gases in ml will be

44. How to find that whether given reaction is double displacement reaction or redox reaction

Name the unit in which the radius of an atom is usually expressed.

4 one litre flasks are separately filled with the gases, O2,F2,CH4 and CO2 under the same condition of temperature and pressure. The ratio of number of molecules in these gases is:

let the mass of electron is two times mass of proton is 1/4th and mass of neutron is 3/2 of the original mass.then atomic weight of C_6^{12} atom

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 ______________.

An element Y is made up of 15 electrons and 16 neutrons. Which of the following is the correct symbolic representation of the element?

What is the boiling point of 1 molal aqueous solution of NaCI \lbrack K, 0.52 K molal-\rbrack(1) 99.48^° C(3) 100.52^° C(2) 98.96^° C(4) 101.04 C

57.Nacl,Mgcl2 and Alcl3 are used as electrolytes in three different cell connected in series.If 3F charge is passed ,the ratio equivalents of Na,Mg and Al deposited on respectively cathodes will be

Q. For gaseous reaction: SO2 +1/2 O2 ----> SO3, if the volume of SO2 is 10L, then what volume of O2 is required ? How to solve it?

The percentage of carbon in ethanoic acid (CH3COOH) is

26.why is it not safe to keep vinegar in copper vessels?but copper cannot displace H+ ion of acids since it is lower in the reactivity series .