10223 + Interview Questions in Chemistry Page 120 InterviewSolution

5951.	The hydride of oxygen is H2O but the hydride of Chlorine is HCl. Give reasons.
Answer» The hydride of oxygen is H2O but the hydride of Chlorine is HCl. Give reasons.

Discussion

5952.	The electron pair which forms a bond between two similar non-metallic atoms will be
Answer» The electron pair which forms a bond between two similar non-metallic atoms will be

Discussion

5953.	Most of the alpha particles passed through the gold foil without deflection because:
Answer» Most of the alpha particles passed through the gold foil without deflection because:

Discussion

5954.	Which of the following are the uses of hydrogen?
Answer» Which of the following are the uses of hydrogen?

Discussion

5955.	Which of the best describes the Brownian motion?
Answer» Which of the best describes the Brownian motion?

Discussion

5956.	An element X forms an oxide XO3, what can be the valency of element X?
Answer» An element $X$ forms an oxide $X O_{3}$ , what can be the valency of element $X$ ?

Discussion

5957.	The total number of lone pairs present in a water molecule is:2
Answer» The total number of lone pairs present in a water molecule is: 2

Discussion

5958.	Zn2+(aq)+2e→Zn(s). This is
Answer» $Z n^{2 +} (a q) + 2 e \to Z n (s)$ . This is

Discussion

5959.	Analyse the chemical equation given below and identify the product of the reaction from the given options. Na2CO3(aq)+H2SO4(aq)→?
Answer» Analyse the chemical equation given below and identify the product of the reaction from the given options. ${Na}_{2} {CO}_{3} (aq) + H_{2} {SO}_{4} (aq) \to ?$

Discussion

5960.	What is the difference between homogeneous and heterogeneous mixture
Answer» What is the difference between homogeneous and heterogeneous mixture

Discussion

5961.	With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.
Answer» With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.

Discussion

5962.	Strongest acid among the following is:
Answer» Strongest acid among the following is:

Discussion

5963.	ph of 0.001 M solution of Ba(OH)2 is
Answer» ph of 0.001 M solution of Ba(OH)2 is

Discussion

5964.	what will be the mass of 1.5055×10^23 molecules of CO.(1)4NAu(2)7NAu(3)8NAu(4)12NA
Answer» what will be the mass of 1.5055×10^23 molecules of CO.(1)4NAu(2)7NAu(3)8NAu(4)12NA

Discussion

5965.	Equation H2S+H2O2→S+2H2O represents
Answer» Equation $H_{2} S + H_{2} O_{2} \to S + 2 H_{2} O$ represents

Discussion

5966.	The charge carried by an electron is ___.
Answer» The charge carried by an electron is ___.

Discussion

5967.	The solubility product of Fe(oh)2 at 25°C is 10^-36.4 mol4dm-12 and E°(Fe+3/Fe)=-0.036V Calculate the standard emf of the reaction Fe(oh)3 -> Fe+3 + 3oh-
Answer» The solubility product of Fe(oh)2 at 25°C is 10^-36.4 mol4dm-12 and E°(Fe+3/Fe)=-0.036V Calculate the standard emf of the reaction Fe(oh)3 -> Fe+3 + 3oh-

Discussion

5968.	Why there are so many lines in hydrogen spectrum?
Answer» Why there are so many lines in hydrogen spectrum?

Discussion

5969.	Question 8(a)Convert into mole:(a) 12 g of oxygen gas
Answer» Question 8(a) Convert into mole: (a) 12 g of oxygen gas

Discussion

5970.	Cellulose dispersed in ethanol is called:
Answer» Cellulose dispersed in ethanol is called:

Discussion

5971.	Question 7 Why is ice at 273 K more effective in cooling than water at the same temperature?
Answer» Question 7 Why is ice at 273 K more effective in cooling than water at the same temperature?

Discussion

5972.	12. A metal forms cubic crystals. The mass of one unit cell of it is M/NA gram, where M is the atomic mass of the metal and NA is the Avogadro number. What is the type of cubic unit cell possessed by the metal?
Answer» 12. A metal forms cubic crystals. The mass of one unit cell of it is M/NA gram, where M is the atomic mass of the metal and NA is the Avogadro number. What is the type of cubic unit cell possessed by the metal?

Discussion

5973.	2.amongst B, Be, Mg ,Al second ionization potential is maximum for
Answer» 2.amongst B, Be, Mg ,Al second ionization potential is maximum for

Discussion

5974.	Question 6(e)Calculate the molar mass of the following substances:(e) Nitric acid, HNO3
Answer» Question 6(e) Calculate the molar mass of the following substances: (e) Nitric acid, $H N O_{3}$

Discussion

5975.	Which of the following compounds have monoatomic ions?
Answer» Which of the following compounds have monoatomic ions?

Discussion

5976.	The constancy of em ratio for electrons inspite of variation of gas present in the discharge tube or of the material of the cathode shows that
Answer» The constancy of $\frac{e}{m}$ ratio for electrons inspite of variation of gas present in the discharge tube or of the material of the cathode shows that

Discussion

5977.	Give reason -. A gas fills completely in the vessel in which it is kept. 2. A gas exerts pressure on the walls of the container.
Answer» Give reason -. A gas fills completely in the vessel in which it is kept. 2. A gas exerts pressure on the walls of the container.

5977.

Give reason -. A gas fills completely in the vessel in which it is kept. 2. A gas exerts pressure on the walls of the container.

Answer»

Give reason -. A gas fills completely in the vessel in which it is kept.

2. A gas exerts pressure on the walls of the container.

Discussion

5978.	what is perpetual motion machine ?
Answer» what is perpetual motion machine ?

Discussion

5979.	If molten magnesium chloride is electolysed,suggest a suitable electrode [anode].give reason
Answer» If molten magnesium chloride is electolysed,suggest a suitable electrode [anode].give reason

Discussion

5980.	The specific conduc†an ce of a saturated solution of AgCl is 1.33×10^-6mhos at 20^° C. Given that ionic conductivities for Ag+ and Cl- ions are 56.9 and 68.4 mho respectively calculate solubility and solubility prouct
Answer» The specific conduc†an ce of a saturated solution of AgCl is 1.33×10^-6mhos at 20^° C. Given that ionic conductivities for Ag+ and Cl- ions are 56.9 and 68.4 mho respectively calculate solubility and solubility prouct

Discussion

5981.	Which of these is the correct group reagent for Mn2+,Co2+,Zn2+& Ni2+ group cations?
Answer» Which of these is the correct group reagent for $M n^{2 +}, C o^{2 +}, Z n^{2 +} & N i^{2 +}$ group cations?

Discussion

5982.	Select the proper option and complete the statements(single, all, double, ionic, carbon, give and take, hydrogen, multiple, share, most, covalent)a. A carbon atom forms a ...... bond with other atoms. In this bond the two atoms ....electrons.b. All the carbon bonds in a saturated hydrocarbon ........ electrons.c. At least one carbon bond in an unsaturated hydrocarbon is ....d. ..... is the essential element in all the organic compounds.e. The element hydrogen is present in ..... organic compound.
Answer» Select the proper option and complete the statements (single, all, double, ionic, carbon, give and take, hydrogen, multiple, share, most, covalent) a. A carbon atom forms a ...... bond with other atoms. In this bond the two atoms ....electrons. b. All the carbon bonds in a saturated hydrocarbon ........ electrons. c. At least one carbon bond in an unsaturated hydrocarbon is .... d. ..... is the essential element in all the organic compounds. e. The element hydrogen is present in ..... organic compound.

Discussion

5983.	The pressure of moist gas is more than that of dry gas under indentical condition.Explain why
Answer» The pressure of moist gas is more than that of dry gas under indentical condition.Explain why

Discussion

5984.	Which of the following is the correct electronic configuration of sodium?
Answer» Which of the following is the correct electronic configuration of sodium?

Discussion

5985.	Two reactions proceed at 25°C at the same rate. The temperature coefficient of the first reaction is 2 and that of the second is 2.5, find the ratio of the rates of second reaction to first reaction at 95°C
Answer» Two reactions proceed at 25°C at the same rate. The temperature coefficient of the first reaction is 2 and that of the second is 2.5, find the ratio of the rates of second reaction to first reaction at 95°C

Discussion

5986.	Incomplete combustion of hydrocarbons results in the formation of:
Answer» Incomplete combustion of hydrocarbons results in the formation of:

Discussion

5987.	What is diffusion?
Answer» What is diffusion?

Discussion

5988.	When iron (Fe, gram atomic mass=56 g) is exposed to the atmospheric oxygen, it results in the formation of rust (Fe2O3, gram molecular mass=160 g). If 1120 g of Fe2O3 is formed, how many moles of Fe2O3 is formed?
Answer» When iron (Fe, gram atomic mass=56 g) is exposed to the atmospheric oxygen, it results in the formation of rust ( ${Fe}_{2} O_{3}$ , gram molecular mass=160 g). If 1120 g of ${Fe}_{2} O_{3}$ is formed, how many moles of ${Fe}_{2} O_{3}$ is formed?

Discussion

5989.	19.NH4COONH2 (s) ----->2NH3 (g) + CO2 (g) if equilibrium pressure of gas is 3 atm then Kp will be.(it is a reversible reaction)
Answer» 19.NH4COONH2 (s) ----->2NH3 (g) + CO2 (g) if equilibrium pressure of gas is 3 atm then Kp will be.(it is a reversible reaction)

Discussion

5990.	Which gas released during combustion is thought to cause global warming?
Answer» Which gas released during combustion is thought to cause global warming?

Discussion

5991.	Name the following 1. A metal below iron but above copper in the activity series of metals which has no reaction with water. 2. A metal which cannot be used for the preparation of hydrogen using dilute acids. 3. The salt formed when aluminium reacts with potassium Hydroxide, during the preparation of hydrogen from alkalis. 4. A gaseous reducing agent which is basic in nature 5. A compound formed between hydrogen and an element group 17[VIIA] - period 3.
Answer» Name the following 1. A metal below iron but above copper in the activity series of metals which has no reaction with water. 2. A metal which cannot be used for the preparation of hydrogen using dilute acids. 3. The salt formed when aluminium reacts with potassium Hydroxide, during the preparation of hydrogen from alkalis. 4. A gaseous reducing agent which is basic in nature 5. A compound formed between hydrogen and an element group 17[VIIA] - period 3.

5991.

Name the following 1. A metal below iron but above copper in the activity series of metals which has no reaction with water. 2. A metal which cannot be used for the preparation of hydrogen using dilute acids. 3. The salt formed when aluminium reacts with potassium Hydroxide, during the preparation of hydrogen from alkalis. 4. A gaseous reducing agent which is basic in nature 5. A compound formed between hydrogen and an element group 17[VIIA] - period 3.

Answer»

Name the following

1. A metal below iron but above copper in the activity series of metals which has no reaction with water.

2. A metal which cannot be used for the preparation of hydrogen using dilute acids.

3. The salt formed when aluminium reacts with potassium Hydroxide, during the preparation of hydrogen from alkalis.

4. A gaseous reducing agent which is basic in nature

5. A compound formed between hydrogen and an element group 17[VIIA] - period 3.

Discussion

5992.	The general chemical formula of alkanes is:
Answer» The general chemical formula of alkanes is:

Discussion

5993.	FeX2 and FeY3 are known when X and Y are:
Answer» $F e X_{2}$ and $F e Y_{3}$ are known when $X$ and $Y$ are:

Discussion

5994.	Question 1 (a)Convert the following temperatures to the Celsius scale.(a) 293 K
Answer» Question 1 (a) Convert the following temperatures to the Celsius scale. (a) 293 K

Discussion

5995.	Write down the power set of the following D={q,p,q,r,s}
Answer» Write down the power set of the following D={q,p,q,r,s}

Discussion

5996.	Question 10 (b) Classify the following into elements, compounds and mixtures. b. Soil
Answer» Question 10 (b) Classify the following into elements, compounds and mixtures. b. Soil

Discussion

5997.	(i) What is fractional distillation? What is the use of fractionating column in fractional distillation?(ii) Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
Answer» (i) What is fractional distillation? What is the use of fractionating column in fractional distillation? (ii) Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.

Discussion

5998.	State the law of conservation of mass. Why do we need to balance a chemical equation?
Answer» State the law of conservation of mass. Why do we need to balance a chemical equation?

Discussion

5999.	Which metal is commonly used in thermometers due to its property of expanding according to change in temperature?
Answer» Which metal is commonly used in thermometers due to its property of expanding according to change in temperature?

Discussion

6000.	Is there interstitial space between Bose Einstein condensate state of matter?
Answer» Is there interstitial space between Bose Einstein condensate state of matter?

Discussion

Explore topic-wise InterviewSolutions in .

The hydride of oxygen is H2O but the hydride of Chlorine is HCl. Give reasons.

The electron pair which forms a bond between two similar non-metallic atoms will be

Most of the alpha particles passed through the gold foil without deflection because:

Which of the following are the uses of hydrogen?

Which of the best describes the Brownian motion?

An element X forms an oxide XO3, what can be the valency of element X?

The total number of lone pairs present in a water molecule is:2

Zn2+(aq)+2e→Zn(s). This is

Analyse the chemical equation given below and identify the product of the reaction from the given options. Na2CO3(aq)+H2SO4(aq)→?

What is the difference between homogeneous and heterogeneous mixture

With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.

Strongest acid among the following is:

ph of 0.001 M solution of Ba(OH)2 is

what will be the mass of 1.5055×10^23 molecules of CO.(1)4NAu(2)7NAu(3)8NAu(4)12NA

Equation H2S+H2O2→S+2H2O represents

The charge carried by an electron is ___.

The solubility product of Fe(oh)2 at 25°C is 10^-36.4 mol4dm-12 and E°(Fe+3/Fe)=-0.036V Calculate the standard emf of the reaction Fe(oh)3 -> Fe+3 + 3oh-

Why there are so many lines in hydrogen spectrum?

Question 8(a)Convert into mole:(a) 12 g of oxygen gas

Cellulose dispersed in ethanol is called:

Question 7 Why is ice at 273 K more effective in cooling than water at the same temperature?

12. A metal forms cubic crystals. The mass of one unit cell of it is M/NA gram, where M is the atomic mass of the metal and NA is the Avogadro number. What is the type of cubic unit cell possessed by the metal?

2.amongst B, Be, Mg ,Al second ionization potential is maximum for

Question 6(e)Calculate the molar mass of the following substances:(e) Nitric acid, HNO3

Which of the following compounds have monoatomic ions?

The constancy of em ratio for electrons inspite of variation of gas present in the discharge tube or of the material of the cathode shows that

Give reason -. A gas fills completely in the vessel in which it is kept. 2. A gas exerts pressure on the walls of the container.

what is perpetual motion machine ?

If molten magnesium chloride is electolysed,suggest a suitable electrode [anode].give reason

The specific conduc†an ce of a saturated solution of AgCl is 1.33×10^-6mhos at 20^° C. Given that ionic conductivities for Ag+ and Cl- ions are 56.9 and 68.4 mho respectively calculate solubility and solubility prouct

Which of these is the correct group reagent for Mn2+,Co2+,Zn2+&amp; Ni2+ group cations?

The pressure of moist gas is more than that of dry gas under indentical condition.Explain why

Which of the following is the correct electronic configuration of sodium?

Two reactions proceed at 25°C at the same rate. The temperature coefficient of the first reaction is 2 and that of the second is 2.5, find the ratio of the rates of second reaction to first reaction at 95°C

Incomplete combustion of hydrocarbons results in the formation of:

What is diffusion?

When iron (Fe, gram atomic mass=56 g) is exposed to the atmospheric oxygen, it results in the formation of rust (Fe2O3, gram molecular mass=160 g). If 1120 g of Fe2O3 is formed, how many moles of Fe2O3 is formed?

19.NH4COONH2 (s) ----->2NH3 (g) + CO2 (g) if equilibrium pressure of gas is 3 atm then Kp will be.(it is a reversible reaction)

Which gas released during combustion is thought to cause global warming?

The general chemical formula of alkanes is:

FeX2 and FeY3 are known when X and Y are:

Question 1 (a)Convert the following temperatures to the Celsius scale.(a) 293 K

Write down the power set of the following D={q,p,q,r,s}

Question 10 (b) Classify the following into elements, compounds and mixtures. b. Soil

(i) What is fractional distillation? What is the use of fractionating column in fractional distillation?​(ii) Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.

State the law of conservation of mass. Why do we need to balance a chemical equation?

Which metal is commonly used in thermometers due to its property of expanding according to change in temperature?

Is there interstitial space between Bose Einstein condensate state of matter?

Which of these is the correct group reagent for Mn2+,Co2+,Zn2+& Ni2+ group cations?

(i) What is fractional distillation? What is the use of fractionating column in fractional distillation?(ii) Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.