15280 + Interview Questions in Chemistry Page 188 InterviewSolution

9351.	The volume of 1.5 gm atoms of helium gas under standard conditions of temperature and pressure is ___ L.
Answer» The volume of $1.5 g m$ atoms of helium gas under standard conditions of temperature and pressure is ___ L.

Discussion

9352.	Select the correct physical properties with respect to sulphuric acid
Answer» Select the correct physical properties with respect to sulphuric acid

Discussion

9353.	Sulphuric acid is a highly corrosive strong mineral acid which has the molecular combination of
Answer» Sulphuric acid is a highly corrosive strong mineral acid which has the molecular combination of

Discussion

9354.	What's the Avagadro number?
Answer» What's the Avagadro number?

Discussion

9355.	On March 31, 2010, the cash book showed a balance of Rs. 3,700 as cash at bank, but the bank pass book made up to the same date showed that cheques for Rs. 700, Rs. 300 and Rs. 180 respectively had not presented had not presented for payment. Also, cheques amounting to Rs. 1,200 deposited into the account has not been credited. Prepare a bank reconciliation statement.
Answer» On March 31, 2010, the cash book showed a balance of Rs. 3,700 as cash at bank, but the bank pass book made up to the same date showed that cheques for Rs. 700, Rs. 300 and Rs. 180 respectively had not presented had not presented for payment. Also, cheques amounting to Rs. 1,200 deposited into the account has not been credited. Prepare a bank reconciliation statement.

Discussion

9356.	Vinay was trying to create Sodium acetate, he added ethanoic acid and 'A' in an open vessel to concentrated H2SO4 and was surprised when the solution gave a sweet effervescence. So he started again in a closed vessel and obtained ethyl acetate. Then he added 'B' and create Sodium acetate. Find a and b
Answer» Vinay was trying to create Sodium acetate, he added ethanoic acid and 'A' in an open vessel to concentrated H2SO4 and was surprised when the solution gave a sweet effervescence. So he started again in a closed vessel and obtained ethyl acetate. Then he added 'B' and create Sodium acetate. Find a and b

Discussion

9357.	Which substance is added to make cakes soft and spongy?
Answer» Which substance is added to make cakes soft and spongy?

Discussion

9358.	Activity to know about condition for rusting AIM: APPARATUS : PROCEDURE : OBSERVATION: INFERENCE : PRECAUTIONS : STEP BY STEP ANSWER
Answer» Activity to know about condition for rusting AIM: APPARATUS : PROCEDURE : OBSERVATION: INFERENCE : PRECAUTIONS : STEP BY STEP ANSWER

Discussion

9359.	An electrolytic cell is set up using two copper electrodes and an aqueous solution of copper (II) sulphate given below: Name the ion discharged at the anode.
Answer» An electrolytic cell is set up using two copper electrodes and an aqueous solution of copper (II) sulphate given below: Name the ion discharged at the anode.

9359.

An electrolytic cell is set up using two copper electrodes and an aqueous solution of copper (II) sulphate given below: Name the ion discharged at the anode.

Answer»

An electrolytic cell is set up using two copper electrodes and an aqueous solution of copper (II) sulphate given below:

Name the ion discharged at the anode.

Discussion

9360.	C4+ and C4- are highly unstable carbon states. It happens when carbon is either positively or negatively charged. But the number of valence electrons in the outer most shell is 8 and carbon has only 4. So why can’t carbon complete its valence electrons??
Answer» C4+ and C4- are highly unstable carbon states. It happens when carbon is either positively or negatively charged. But the number of valence electrons in the outer most shell is 8 and carbon has only 4. So why can’t carbon complete its valence electrons??

Discussion

9361.	If no metals can form covalent bond with chlorine I. e they can share electrons with Chlorine then why can't they do the same with Hydrogen? Besides both chlorine and Hydrogen require only one electron
Answer» If no metals can form covalent bond with chlorine I. e they can share electrons with Chlorine then why can't they do the same with Hydrogen? Besides both chlorine and Hydrogen require only one electron

Discussion

9362.	Question 1 Which of the statements about the reaction below are incorrect? 2PbO(s)+C(s)→2Pb (s)+CO2(g) (a) Lead is getting reduced. (b) Carbon dioxide is getting oxidized. (c) Carbon is getting oxidized. (d) Lead oxide is getting reduced.
Answer» Question 1 Which of the statements about the reaction below are incorrect? $2 PbO(s) + C(s) \to 2 Pb (s) + {CO}_{2} (g)$ (a) Lead is getting reduced. (b) Carbon dioxide is getting oxidized. (c) Carbon is getting oxidized. (d) Lead oxide is getting reduced.

Discussion

9363.	balance this equation Cu(HCO3)2 + HCl => CuCl2 + H2O + CO2
Answer» balance this equation Cu(HCO₃)₂+ HCl => CuCl₂+ H₂O + CO₂

9363.

balance this equation Cu(HCO3)2 + HCl => CuCl2 + H2O + CO2

Answer»

balance this equation

Cu(HCO₃)₂+ HCl => CuCl₂+ H₂O + CO₂

Discussion

9364.	Silicon dioxide is:
Answer» Silicon dioxide is:

Discussion

9365.	Chlorine reacts with water in presence of sunlight to liberate _______ .
Answer» Chlorine reacts with water in presence of sunlight to liberate _______ .

Discussion

9366.	What is the term given to the atoms of an element with same atomic number but different mass number?
Answer» What is the term given to the atoms of an element with same atomic number but different mass number?

Discussion

9367.	Enzymes increase the rate of biochemical reaction through
Answer» Enzymes increase the rate of biochemical reaction through

Discussion

9368.	Which of the following have both metallic as well as non-metallic nature?
Answer» Which of the following have both metallic as well as non-metallic nature?

Discussion

9369.	For a reversible system, what happens when the volume of the reacting system in equilibrium is increased:
Answer» For a reversible system, what happens when the volume of the reacting system in equilibrium is increased:

Discussion

9370.	Are Ethene- Ethylene Propene-proplylene and,Butene-Butylene the same
Answer» Are Ethene- Ethylene Propene-proplylene and,Butene-Butylene the same

Discussion

9371.	Question 2 (i) Write equation for the reaction of iron with steam.
Answer» Question 2 (i) Write equation for the reaction of iron with steam.

Discussion

9372.	Which of the following set of elements is written correctly in the order of their increasing metallic character? (a) Mg, Al, Si (b) C, O, N (c) Na, Li, K (d) Be, Mg, Ca
Answer» Which of the following set of elements is written correctly in the order of their increasing metallic character? (a) Mg, Al, Si (b) C, O, N (c) Na, Li, K (d) Be, Mg, Ca

9372.

Which of the following set of elements is written correctly in the order of their increasing metallic character? (a) Mg, Al, Si (b) C, O, N (c) Na, Li, K (d) Be, Mg, Ca

Answer»

Which of the following set of elements is written correctly in the order of their increasing metallic character?

(a) Mg, Al, Si (b) C, O, N (c) Na, Li, K (d) Be, Mg, Ca

Discussion

9373.	(a) Define non-metal . Give five examples of non-metals. (b) Name a non-metal which conducts electricity. (c) Name a non-metal having lustre (shining surface). (d) Name a non-metal which reacts with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?
Answer» (a) Define non-metal . Give five examples of non-metals. (b) Name a non-metal which conducts electricity. (c) Name a non-metal having lustre (shining surface). (d) Name a non-metal which reacts with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?

Discussion

9374.	Which of the following is the correct chemical equation for combustion of Zn?
Answer» Which of the following is the correct chemical equation for combustion of Zn?

Discussion

9375.	(a) What do you think will be the pH in the stomach of a person suffering from indigestion: less than 7 or more than 7? (b) What do you think will be the pH of an antacid solution: less than 7 or more than 7? (c) How does an antacid work? (d) Name two common antacids.
Answer» (a) What do you think will be the pH in the stomach of a person suffering from indigestion: less than 7 or more than 7? (b) What do you think will be the pH of an antacid solution: less than 7 or more than 7? (c) How does an antacid work? (d) Name two common antacids.

9375.

(a) What do you think will be the pH in the stomach of a person suffering from indigestion: less than 7 or more than 7? (b) What do you think will be the pH of an antacid solution: less than 7 or more than 7? (c) How does an antacid work? (d) Name two common antacids.

Answer»

(a) What do you think will be the pH in the stomach of a person suffering from indigestion: less than 7 or more than 7?

(b) What do you think will be the pH of an antacid solution: less than 7 or more than 7?

(c) How does an antacid work?

(d) Name two common antacids.

Discussion

9376.	What do you understand by the term 'chemical reaction'?
Answer» What do you understand by the term 'chemical reaction'?

Discussion

9377.	Why do wine glass have a heavy and broad base
Answer» Why do wine glass have a heavy and broad base

Discussion

9378.	Why was plum pudding model unsuccessful in establishing the true nature of atoms
Answer» Why was plum pudding model unsuccessful in establishing the true nature of atoms

Discussion

9379.	Why silver chloride is stored in dark coloured bottles?
Answer» Why silver chloride is stored in dark coloured bottles?

Discussion

9380.	13. In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate? (a) Lead sulphate (insoluble) (b) Lead acetate (c) Ammonium nitrate (d) Potassium sulphate
Answer» 13. In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate? (a) Lead sulphate (insoluble) (b) Lead acetate (c) Ammonium nitrate (d) Potassium sulphate

Discussion

9381.	Why and how does unsaturated compounds discharge the pink colour of alkaline KMnO4 ?
Answer» Why and how does unsaturated compounds discharge the pink colour of alkaline KMnO₄ ?

Discussion

9382.	Which of the following drying agent is used in drying hydrogen chloride gas?
Answer» Which of the following drying agent is used in drying hydrogen chloride gas?

Discussion

9383.	What happens when cupric oxide reacts with sulphuric acid?
Answer» What happens when cupric oxide reacts with sulphuric acid?

Discussion

9384.	What happens when magnesium reacts with dilute sulphuric acid?
Answer» What happens when magnesium reacts with dilute sulphuric acid?

Discussion

9385.	Name the salt referred to as Chile saltpetre.
Answer» Name the salt referred to as Chile saltpetre.

Discussion

9386.	A solution has a pH value of 11. What kind of a substance is it?
Answer» A solution has a pH value of 11. What kind of a substance is it?

Discussion

9387.	The volume of a scuba tank is 10.0 L. It contains a mixture of nitrogen and oxygen at 290 atm. What volume of this mixture could the tank supply to a diver at 2.40 atm?
Answer» The volume of a scuba tank is 10.0 L. It contains a mixture of nitrogen and oxygen at 290 atm. What volume of this mixture could the tank supply to a diver at 2.40 atm?

Discussion

9388.	Which of the following acids is not found in acid rain?
Answer» Which of the following acids is not found in acid rain?

Discussion

9389.	The atomic number of A is 17. Name the element A and state whether A is a metal or non- metal.
Answer» The atomic number of A is 17. Name the element A and state whether A is a metal or non- metal.

Discussion

9390.	Question 21.3 Complete the missing components/variables given as x and y in the following reaction: Zn(s)+H2SO4(aq)→ZnSO4(x)+H2(y)
Answer» Question 21.3 Complete the missing components/variables given as x and y in the following reaction: $Zn(s) + H_{2} {SO}_{4} (aq) \to {ZnSO}_{4} (x) + H_{2} (y)$

Discussion

9391.	List some of the substances which can be used in cryogenic applications.
Answer» List some of the substances which can be used in cryogenic applications.

Discussion

9392.	What is a soap, what for is it used ?
Answer» What is a soap, what for is it used ?

Discussion

9393.	What is the basis of how acids are named?
Answer» What is the basis of how acids are named?

Discussion

9394.	Reaction between Ammonium chloride and Barium hydroxide is :
Answer» Reaction between Ammonium chloride and Barium hydroxide is :

Discussion

9395.	Why are metals called electropositive elements whereas non-metals are called electronegative elements?
Answer» Why are metals called electropositive elements whereas non-metals are called electronegative elements?

Discussion

9396.	An element Y is in second period and group 16 of the periodic table : (i) Is it a metal or non-metal? (ii) What is the number of valence electrons in its atom? (iii) What is its valency? (iv) What is the name of the element? (v) What will be the formula of the compound formed by Y with Sodium?
Answer» An element Y is in second period and group 16 of the periodic table : (i) Is it a metal or non-metal? (ii) What is the number of valence electrons in its atom? (iii) What is its valency? (iv) What is the name of the element? (v) What will be the formula of the compound formed by Y with Sodium?

9396.

An element Y is in second period and group 16 of the periodic table : (i) Is it a metal or non-metal? (ii) What is the number of valence electrons in its atom? (iii) What is its valency? (iv) What is the name of the element? (v) What will be the formula of the compound formed by Y with Sodium?

Answer»

An element Y is in second period and group 16 of the periodic table :

(i) Is it a metal or non-metal?

(ii) What is the number of valence electrons in its atom?

(iii) What is its valency?

(iv) What is the name of the element?

(v) What will be the formula of the compound formed by Y with Sodium?

Discussion

9397.	CuSO4(aq)+Fe(s)⟶FeSO4(aq)+Cu(s)FeSO4(aq)+Zn(s)⟶ZnSO4(aq)+Fe(s) On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.
Answer» $C u S O_{4} (a q) + F e (s) ⟶ F e S O_{4} (a q) + C u (s) F e S O_{4} (a q) + Z n (s) ⟶ Z n S O_{4} (a q) + F e (s)$ On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.

Discussion

9398.	How will the tendency to gain electrons change as we go from left to right across a period? Why? [2 MARKS]
Answer» How will the tendency to gain electrons change as we go from left to right across a period? Why? [2 MARKS]

Discussion

9399.	Using a part of the periodic table given below answer the following questions: (i) Na has physical properties similar to which elements and why? (ii) Write the electronic configuration of N and P. (iii) State one property common to fluorine and chlorine. Group PeriodIIIIIIIVVVIVIIZero1HHe2LiBeBCNOFNe3NaMgAlSiPSClAr4KCa
Answer» Using a part of the periodic table given below answer the following questions: (i) Na has physical properties similar to which elements and why? (ii) Write the electronic configuration of N and P. (iii) State one property common to fluorine and chlorine. $\begin{matrix} G r o u p P e r i o d & I & I I & I I I & I V & V & V I & V I I & Z e r o 1 & H & H e 2 & L i & B e & B & C & N & O & F & N e 3 & N a & M g & A l & S i & P & S & C l & A r 4 & K & C a \end{matrix}$

9399.

Using a part of the periodic table given below answer the following questions: (i) Na has physical properties similar to which elements and why? (ii) Write the electronic configuration of N and P. (iii) State one property common to fluorine and chlorine. Group PeriodIIIIIIIVVVIVIIZero1HHe2LiBeBCNOFNe3NaMgAlSiPSClAr4KCa

Answer»

Using a part of the periodic table given below answer the following questions:
(i) Na has physical properties similar to which elements and why?
(ii) Write the electronic configuration of N and P.
(iii) State one property common to fluorine and chlorine.

$\begin{matrix} G r o u p P e r i o d & I & I I & I I I & I V & V & V I & V I I & Z e r o 1 & H & H e 2 & L i & B e & B & C & N & O & F & N e 3 & N a & M g & A l & S i & P & S & C l & A r 4 & K & C a \end{matrix}$

Discussion

9400.	Formation of 2-butene as major product by dehydration of 2-butanol is according to
Answer» Formation of 2-butene as major product by dehydration of 2-butanol is according to

Discussion

Explore topic-wise InterviewSolutions in .

The volume of 1.5 gm atoms of helium gas under standard conditions of temperature and pressure is ___ L.

Select the correct physical properties with respect to sulphuric acid

Sulphuric acid is a highly corrosive strong mineral acid which has the molecular combination of

What's the Avagadro number?

Which substance is added to make cakes soft and spongy?

Activity to know about condition for rusting AIM: APPARATUS : PROCEDURE : OBSERVATION: INFERENCE : PRECAUTIONS : STEP BY STEP ANSWER

An electrolytic cell is set up using two copper electrodes and an aqueous solution of copper (II) sulphate given below: Name the ion discharged at the anode.

C4+ and C4- are highly unstable carbon states. It happens when carbon is either positively or negatively charged. But the number of valence electrons in the outer most shell is 8 and carbon has only 4. So why can’t carbon complete its valence electrons??

If no metals can form covalent bond with chlorine I. e they can share electrons with Chlorine then why can't they do the same with Hydrogen? Besides both chlorine and Hydrogen require only one electron

Question 1 Which of the statements about the reaction below are incorrect? 2PbO(s)+C(s)→2Pb (s)+CO2(g) (a) Lead is getting reduced. (b) Carbon dioxide is getting oxidized. (c) Carbon is getting oxidized. (d) Lead oxide is getting reduced.

balance this equation Cu(HCO3)2 + HCl =&gt; CuCl2 + H2O + CO2

Silicon dioxide is:

Chlorine reacts with water in presence of sunlight to liberate _______ .

What is the term given to the atoms of an element with same atomic number but different mass number?

Enzymes increase the rate of biochemical reaction through

Which of the following have both metallic as well as non-metallic nature?

For a reversible system, what happens when the volume of the reacting system in equilibrium is increased:

Are Ethene- Ethylene Propene-proplylene and,Butene-Butylene the same

Question 2 (i) Write equation for the reaction of iron with steam.

Which of the following set of elements is written correctly in the order of their increasing metallic character? (a) Mg, Al, Si (b) C, O, N (c) Na, Li, K (d) Be, Mg, Ca

Which of the following is the correct chemical equation for combustion of Zn?

(a) What do you think will be the pH in the stomach of a person suffering from indigestion: less than 7 or more than 7? (b) What do you think will be the pH of an antacid solution: less than 7 or more than 7? (c) How does an antacid work? (d) Name two common antacids.

What do you understand by the term 'chemical reaction'?

Why do wine glass have a heavy and broad base

Why was plum pudding model unsuccessful in establishing the true nature of atoms

Why silver chloride is stored in dark coloured bottles?

Why and how does unsaturated compounds discharge the pink colour of alkaline KMnO​​​4 ?

Which of the following drying agent is used in drying hydrogen chloride gas?

What happens when cupric oxide reacts with sulphuric acid?

What happens when magnesium reacts with dilute sulphuric acid?

Name the salt referred to as Chile saltpetre.

A solution has a pH value of 11. What kind of a substance is it?

The volume of a scuba tank is 10.0 L. It contains a mixture of nitrogen and oxygen at 290 atm. What volume of this mixture could the tank supply to a diver at 2.40 atm?

Which of the following acids is not found in acid rain?

The atomic number of A is 17. Name the element A and state whether A is a metal or non- metal.

Question 21.3 Complete the missing components/variables given as x and y in the following reaction: Zn(s)+H2SO4(aq)→ZnSO4(x)+H2(y)

List some of the substances which can be used in cryogenic applications.

What is a soap, what for is it used ?

What is the basis of how acids are named?

Reaction between Ammonium chloride and Barium hydroxide is :

Why are metals called electropositive elements whereas non-metals are called electronegative elements?

An element Y is in second period and group 16 of the periodic table : (i) Is it a metal or non-metal? (ii) What is the number of valence electrons in its atom? (iii) What is its valency? (iv) What is the name of the element? (v) What will be the formula of the compound formed by Y with Sodium?

CuSO4(aq)+Fe(s)⟶FeSO4(aq)+Cu(s)FeSO4(aq)+Zn(s)⟶ZnSO4(aq)+Fe(s) On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.

How will the tendency to gain electrons change as we go from left to right across a period? Why? [2 MARKS]

Formation of 2-butene as major product by dehydration of 2-butanol is according to

balance this equation Cu(HCO3)2 + HCl => CuCl2 + H2O + CO2

Why and how does unsaturated compounds discharge the pink colour of alkaline KMnO4 ?