15280 + Interview Questions in Chemistry Page 267 InterviewSolution

13301.	The number of molecules of water of crystallization present in washing soda are:
Answer» The number of molecules of water of crystallization present in washing soda are:

Discussion

13302.	Why does Sulphur exist as s8 usually, not s2? Won't it be much hassle free and involve only two atoms? Please may I simplified answer as we have not studied much about sigma or pi
Answer» Why does Sulphur exist as s8 usually, not s2? Won't it be much hassle free and involve only two atoms? Please may I simplified answer as we have not studied much about sigma or pi

Discussion

13303.	The acid which is used in the silk industries is
Answer» The acid which is used in the silk industries is

Discussion

13304.	(a) What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements? (b) What is the number of elements in (a) 1st period, and (b) 3rd period, of the modern periodic table?
Answer» (a) What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements? (b) What is the number of elements in (a) 1st period, and (b) 3rd period, of the modern periodic table?

13304.

(a) What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements? (b) What is the number of elements in (a) 1st period, and (b) 3rd period, of the modern periodic table?

Answer»

(a) What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?

(b) What is the number of elements in (a) 1st period, and (b) 3rd period, of the modern periodic table?

Discussion

13305.	Name an alloy of lead and tin.
Answer» Name an alloy of lead and tin.

Discussion

13306.	How is Plaster of Paris obtained? What reactions are involved in the setting the paste of Plaster of Paris?
Answer» How is Plaster of Paris obtained? What reactions are involved in the setting the paste of Plaster of Paris?

Discussion

13307.	Aluminium is said to be more reactive than iron, towards oxygen (or air).Yet iron undergoes corrosion to a greater extent than aluminium.Explain.
Answer» Aluminium is said to be more reactive than iron, towards oxygen (or air).Yet iron undergoes corrosion to a greater extent than aluminium.Explain.

Discussion

13308.	What are Avatars of elements
Answer» What are Avatars of elements

Discussion

13309.	Which of the following gives paracetamol on acylation?
Answer» Which of the following gives paracetamol on acylation?

Discussion

13310.	Which compound is found in fuels like CNG, LPG etc?
Answer» Which compound is found in fuels like CNG, LPG etc?

Discussion

13311.	Halo alkanes react with alkalies to produce alcohol. Give the equation for the preparation of second member of homologous series of alcohol. State under what condition the reaction occurs.
Answer» Halo alkanes react with alkalies to produce alcohol. Give the equation for the preparation of second member of homologous series of alcohol. State under what condition the reaction occurs.

Discussion

13312.	How many pair(s) of electrons are shared between the two carbon atoms in an ethene molecule?
Answer» How many pair(s) of electrons are shared between the two carbon atoms in an ethene molecule?

13312.

How many pair(s) of electrons are shared between the two carbon atoms in an ethene molecule?

Answer»

How many pair(s) of electrons are shared between the two carbon atoms in an ethene molecule?

Discussion

13313.	What is the reaction involved in formation of potassium hydride
Answer» What is the reaction involved in formation of potassium hydride

Discussion

13314.	What are neutral oxides?
Answer» What are neutral oxides?

Discussion

13315.	LiCl and BCl3 are examples of ___.
Answer» $L i C l$ and $B C l_{3}$ are examples of ___.

Discussion

13316.	Manish Ltd. issued Rs 38,00,000; 8% Debentures of Rs 100 each on 1st April,2013. The terms of issue stated that the debentures were due to redeemed at a premium of 5% on 30th June, 2015. The Company decided to transfer out of profits Rs 5,50,000 to Debenture Redemption Reserve on 31st March, 2014 and Rs 4,00,000 on 31st March, 2015. Pass the necessary Journal entries the issue and redemption of debentures, without providing for either the interest or loss on issue of debentures.
Answer» Manish Ltd. issued Rs 38,00,000; $8 %$ Debentures of Rs 100 each on 1st April,2013. The terms of issue stated that the debentures were due to redeemed at a premium of $5 %$ on 30th June, 2015. The Company decided to transfer out of profits Rs 5,50,000 to Debenture Redemption Reserve on 31st March, 2014 and Rs 4,00,000 on 31st March, 2015. Pass the necessary Journal entries the issue and redemption of debentures, without providing for either the interest or loss on issue of debentures.

13316.

Manish Ltd. issued Rs 38,00,000; 8% Debentures of Rs 100 each on 1st April,2013. The terms of issue stated that the debentures were due to redeemed at a premium of 5% on 30th June, 2015. The Company decided to transfer out of profits Rs 5,50,000 to Debenture Redemption Reserve on 31st March, 2014 and Rs 4,00,000 on 31st March, 2015. Pass the necessary Journal entries the issue and redemption of debentures, without providing for either the interest or loss on issue of debentures.

Answer»

Manish Ltd. issued Rs 38,00,000; $8 %$ Debentures of Rs 100 each on 1st April,2013. The terms of issue stated that the debentures were due to redeemed at a premium of $5 %$ on 30th June, 2015. The Company decided to transfer out of profits Rs 5,50,000 to Debenture Redemption Reserve on 31st March, 2014 and Rs 4,00,000 on 31st March, 2015.

Pass the necessary Journal entries the issue and redemption of debentures, without providing for either the interest or loss on issue of debentures.

Discussion

13317.	How many unpaired electrons are present in Ni+2?
Answer» How many unpaired electrons are present in $N i^{+ 2}$ ?

Discussion

13318.	How many moles of iron can be made from Fe2O3 by the use of 16 mol of CO in the following reaction? Fe2O3 + 3CO → 2Fe +3CO2
Answer» How many moles of iron can be made from $F e_{2} O_{3}$ by the use of 16 mol of CO in the following reaction? $F e_{2} O_{3}$ + 3CO $\to$ 2Fe +3 $C O_{2}$

13318.

How many moles of iron can be made from Fe2O3 by the use of 16 mol of CO in the following reaction? Fe2O3 + 3CO → 2Fe +3CO2

Answer»

How many moles of iron can be made from $F e_{2} O_{3}$ by the use of 16 mol of CO in the following reaction?

$F e_{2} O_{3}$ + 3CO $\to$ 2Fe +3 $C O_{2}$

Discussion

13319.	There are four solutions of NaCl of the given concentrations : (i) 1.0M(ii) 0.1M(iii) 0.01M(iv) 0.5M The correct order of this equivalent conductances
Answer» There are four solutions of NaCl of the given concentrations : (i) 1.0M(ii) 0.1M(iii) 0.01M(iv) 0.5M The correct order of this equivalent conductances

Discussion

13320.	Explain each and every topic in briefly with example ?
Answer» Explain each and every topic in briefly with example ?

Discussion

13321.	Sodium peroxide upon reacting with___ results in sodium hydroxide and oxygen.
Answer» Sodium peroxide upon reacting with___ results in sodium hydroxide and oxygen.

Discussion

13322.	Why diamond is a hard and the graphite is very soft.
Answer» Why diamond is a hard and the graphite is very soft.

Discussion

13323.	1.Explain Modern Periodic law and the present form of the periodic table(point wise)
Answer» 1.Explain Modern Periodic law and the present form of the periodic table(point wise)

Discussion

13324.	Why should magnesium ribbon be cleaned before burning in air? Is it because it reacts with CO2 or with O2 in the air?
Answer» Why should magnesium ribbon be cleaned before burning in air? Is it because it reacts with CO₂ or with O₂ in the air?

13324.

Why should magnesium ribbon be cleaned before burning in air? Is it because it reacts with CO2 or with O2 in the air?

Answer»

Why should magnesium ribbon be cleaned before burning in air?

Is it because it reacts with CO₂ or with O₂ in the air?

Discussion

13325.	Reactions are of 4 types: combination, decomposition, displacement& double displacement. Then this reaction :" NaHCO³ + HCl turns into NaCl + CO² + H²O " comes under which category?
Answer» Reactions are of 4 types: combination, decomposition, displacement& double displacement. Then this reaction :" NaHCO³ + HCl turns into NaCl + CO² + H²O " comes under which category?

Discussion

13326.	(a) What is graphite? Of what substance is graphite made? (b) Describe the structure of graphite with the help of a labelled diagram. (c) Why is graphite a good conductor of electricity but diamond is a non-conductor of electricity? (d) State any two uses of graphite.
Answer» (a) What is graphite? Of what substance is graphite made? (b) Describe the structure of graphite with the help of a labelled diagram. (c) Why is graphite a good conductor of electricity but diamond is a non-conductor of electricity? (d) State any two uses of graphite.

Discussion

13327.	Up to what part of biogas is methane?
Answer» Up to what part of biogas is methane?

Discussion

13328.	Which of the following set represents the correct order of first ionization potential?
Answer» Which of the following set represents the correct order of first ionization potential?

Discussion

13329.	Consider the section of the Periodic Table given below: Note: In this table: B does not represent boron. C does not represent carbon. F does not represent fluorine. H does not represent hydrogen. K does not represent potassium. You must see the position of the element in the Periodic Table. Some elements are given in their own symbol and position in the Periodic Table while others are shown with a letter. With reference to the table: Write the formula of the compound between B and H.
Answer» Consider the section of the Periodic Table given below: Note: In this table: B does not represent boron. C does not represent carbon. F does not represent fluorine. H does not represent hydrogen. K does not represent potassium. You must see the position of the element in the Periodic Table. Some elements are given in their own symbol and position in the Periodic Table while others are shown with a letter. With reference to the table: Write the formula of the compound between B and H.

13329.

Consider the section of the Periodic Table given below: Note: In this table: B does not represent boron. C does not represent carbon. F does not represent fluorine. H does not represent hydrogen. K does not represent potassium. You must see the position of the element in the Periodic Table. Some elements are given in their own symbol and position in the Periodic Table while others are shown with a letter. With reference to the table: Write the formula of the compound between B and H.

Answer»

Consider the section of the Periodic Table given below:

Note: In this table:

B does not represent boron. C does not represent carbon. F does not represent fluorine. H does not represent hydrogen. K does not represent potassium.

You must see the position of the element in the Periodic Table.

Some elements are given in their own symbol and position in the Periodic Table while others are shown with a letter. With reference to the table:

Write the formula of the compound between B and H.

Discussion

13330.	Which of the following is oxidation?
Answer» Which of the following is oxidation?

Discussion

13331.	Reactions taking place in both directions are called ___.
Answer» Reactions taking place in both directions are called ___.

Discussion

13332.	Question 30 The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct? (a) X is a metal. (b) Y is a metal. (c) Z is a non-metal. (d) Y is a non-metal and Z is a metal.
Answer» Question 30 The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct? (a) X is a metal. (b) Y is a metal. (c) Z is a non-metal. (d) Y is a non-metal and Z is a metal.

Discussion

13333.	The action of heat on the blue crystalline solid X, gives a reddish gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed. (a) Identify X, Y and Z. (b) Write equation for action of heat on X. (c) Write equation between solution of X and gas Z.
Answer» The action of heat on the blue crystalline solid X, gives a reddish gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed. (a) Identify X, Y and Z. (b) Write equation for action of heat on X. (c) Write equation between solution of X and gas Z.

13333.

The action of heat on the blue crystalline solid X, gives a reddish gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed. (a) Identify X, Y and Z. (b) Write equation for action of heat on X. (c) Write equation between solution of X and gas Z.

Answer»

The action of heat on the blue crystalline solid X, gives a reddish gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed.

(a) Identify X, Y and Z.

(b) Write equation for action of heat on X.

(c) Write equation between solution of X and gas Z.

Discussion

13334.	Which of the following pairs are correct?
Answer» Which of the following pairs are correct?

Discussion

13335.	Bohr 's shell model also explained why some of the elements in the periodic table are chemically inert. This is because the outermost shell of the atom is full. These elements are called ______.
Answer» Bohr 's shell model also explained why some of the elements in the periodic table are chemically inert. This is because the outermost shell of the atom is full. These elements are called ______.

Discussion

13336.	HCl + NaOH ---------> NaCl +H2O is a nutralization reaction but is it a double displacement reaction?
Answer» HCl + NaOH ---------> NaCl +H2O is a nutralization reaction but is it a double displacement reaction?

Discussion

13337.	Which amonst the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?
Answer» Which amonst the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?

Discussion

13338.	(a) Write the name and formula of an organic compound containing a ketone functional group. (b) Write the names and formulae for the first three members of the homologous series of chloroalkanes. (c) How would you name the following compound? CH3−CH2−Br
Answer» (a) Write the name and formula of an organic compound containing a ketone functional group. (b) Write the names and formulae for the first three members of the homologous series of chloroalkanes. (c) How would you name the following compound? $C H_{3} - C H_{2} - B r$

Discussion

13339.	Biomagnification is highest in:
Answer» Biomagnification is highest in:

13339.

Biomagnification is highest in:

Answer»

Biomagnification is highest in:

Discussion

13340.	Arrange the following hydrides in their increasing acid strength [CH4, H2S, PH3 and SiH4] -
Answer» Arrange the following hydrides in their increasing acid strength $[C H_{4}, H_{2} S, P H_{3} a n d S i H_{4}]$ -

Discussion

13341.	__ is formed when CaO(quick lime) reacts with water.
Answer» __ is formed when CaO(quick lime) reacts with water.

Discussion

13342.	The end product of anaerobic respiration in muscles is:
Answer» The end product of anaerobic respiration in muscles is:

Discussion

13343.	Iron with the carbon content of 0.25-2% can be classified as:
Answer» Iron with the carbon content of 0.25-2% can be classified as:

Discussion

13344.	The sum of the probabilities of all elementary events is
Answer» The sum of the probabilities of all elementary events is

Discussion

13345.	Match the process of concentration of ore with the property that is based on: ProcessPropertyi) Gravity separationa) Magnetic propertyii) Froth flotationb) Difference in weightiii) Magnetic separationc) Wetting property
Answer» Match the process of concentration of ore with the property that is based on: $\begin{matrix} Process & Property i) Gravity separation & a) Magnetic property ii) Froth flotation & b) Difference in weight iii) Magnetic separation & c) Wetting property \end{matrix}$

13345.

Match the process of concentration of ore with the property that is based on: ProcessPropertyi) Gravity separationa) Magnetic propertyii) Froth flotationb) Difference in weightiii) Magnetic separationc) Wetting property

Answer»

Match the process of concentration of ore with the property that is based on:

$\begin{matrix} Process & Property i) Gravity separation & a) Magnetic property ii) Froth flotation & b) Difference in weight iii) Magnetic separation & c) Wetting property \end{matrix}$

Discussion

13346.	Apart from Carbon which other elements commonly form allotropes? Do you have any clue?
Answer» Apart from Carbon which other elements commonly form allotropes? Do you have any clue?

Discussion

13347.	Question 15 Does force of gravity act on dust particles?
Answer» Question 15 Does force of gravity act on dust particles?

Discussion

13348.	Question 18 Which one of the following is the correct electronic configuration of sodium? (a) 2, 8 (b) 8, 2, 1 (c) 2, 1, 8 (d) 2, 8, 1
Answer» Question 18 Which one of the following is the correct electronic configuration of sodium? (a) 2, 8 (b) 8, 2, 1 (c) 2, 1, 8 (d) 2, 8, 1

Discussion

13349.	Why oxidizing agents get reduced?
Answer» Why oxidizing agents get reduced?

Discussion

13350.	Which of the following metals can be cut by a knife?
Answer» Which of the following metals can be cut by a knife?

Discussion

Explore topic-wise InterviewSolutions in .

The number of molecules of water of crystallization present in washing soda are:

​​​Why does Sulphur exist as s8 usually, not s2? Won't it be much hassle free and involve only two atoms? Please may I simplified answer as we have not studied much about sigma or pi

The acid which is used in the silk industries is

(a) What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements? (b) What is the number of elements in (a) 1st period, and (b) 3rd period, of the modern periodic table?

Name an alloy of lead and tin.

How is Plaster of Paris obtained? What reactions are involved in the setting the paste of Plaster of Paris?

Aluminium is said to be more reactive than iron, towards oxygen (or air).Yet iron undergoes corrosion to a greater extent than aluminium.Explain.

What are Avatars of elements

Which of the following gives paracetamol on acylation?

Which compound is found in fuels like CNG, LPG etc?

Halo alkanes react with alkalies to produce alcohol. Give the equation for the preparation of second member of homologous series of alcohol. State under what condition the reaction occurs.

How many pair(s) of electrons are shared between the two carbon atoms in an ethene molecule?

What is the reaction involved in formation of potassium hydride

What are neutral oxides?

LiCl and BCl3 are examples of ___.

How many unpaired electrons are present in Ni+2?

How many moles of iron can be made from Fe2O3 by the use of 16 mol of CO in the following reaction? Fe2O3 + 3CO → 2Fe +3CO2

There are four solutions of NaCl of the given concentrations : (i) 1.0M(ii) 0.1M(iii) 0.01M(iv) 0.5M The correct order of this equivalent conductances

Explain each and every topic in briefly with example ?

Sodium peroxide upon reacting with___ results in sodium hydroxide and oxygen.

Why diamond is a hard and the graphite is very soft.

1.Explain Modern Periodic law and the present form of the periodic table(point wise)

Why should magnesium ribbon be cleaned before burning in air? Is it because it reacts with CO2 or with O2 in the air?

Reactions are of 4 types: combination, decomposition, displacement&amp; double displacement. Then this reaction :" NaHCO³ + HCl turns into NaCl + CO² + H²O " comes under which category?

(a) What is graphite? Of what substance is graphite made? (b) Describe the structure of graphite with the help of a labelled diagram. (c) Why is graphite a good conductor of electricity but diamond is a non-conductor of electricity? (d) State any two uses of graphite.

Up to what part of biogas is methane?

Which of the following set represents the correct order of first ionization potential?

Which of the following is oxidation?

Reactions taking place in both directions are called ___.

Question 30 The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct? (a) X is a metal. (b) Y is a metal. (c) Z is a non-metal. (d) Y is a non-metal and Z is a metal.

Which of the following pairs are correct?

Bohr 's shell model also explained why some of the elements in the periodic table are chemically inert. This is because the outermost shell of the atom is full. These elements are called ______.

HCl + NaOH ---------> NaCl +H2O is a nutralization reaction but is it a double displacement reaction?

Which amonst the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?

(a) Write the name and formula of an organic compound containing a ketone functional group. (b) Write the names and formulae for the first three members of the homologous series of chloroalkanes. (c) How would you name the following compound? CH3−CH2−Br

Biomagnification is highest in:

Arrange the following hydrides in their increasing acid strength [CH4, H2S, PH3 and SiH4] -

__ is formed when CaO(quick lime) reacts with water.

The end product of anaerobic respiration in muscles is:

Iron with the carbon content of 0.25-2% can be classified as:

The sum of the probabilities of all elementary events is

Match the process of concentration of ore with the property that is based on: ProcessPropertyi) Gravity separationa) Magnetic propertyii) Froth flotationb) Difference in weightiii) Magnetic separationc) Wetting property

Apart from Carbon which other elements commonly form allotropes? Do you have any clue?

Question 15 Does force of gravity act on dust particles?

Question 18 Which one of the following is the correct electronic configuration of sodium? (a) 2, 8 (b) 8, 2, 1 (c) 2, 1, 8 (d) 2, 8, 1

Why oxidizing agents get reduced?

Which of the following metals can be cut by a knife?

Why does Sulphur exist as s8 usually, not s2? Won't it be much hassle free and involve only two atoms? Please may I simplified answer as we have not studied much about sigma or pi

Reactions are of 4 types: combination, decomposition, displacement& double displacement. Then this reaction :" NaHCO³ + HCl turns into NaCl + CO² + H²O " comes under which category?