15280 + Interview Questions in Chemistry Page 249 InterviewSolution

12401.	Number of moles of electrons present in 3.0115×1024 particles of CO2 is:
Answer» Number of moles of electrons present in $3.0115 \times 10^{24}$ particles of $C O_{2}$ is:

Discussion

12402.	What are miscelles? How are they related with soaps?
Answer» What are miscelles? How are they related with soaps?

12402.

What are miscelles? How are they related with soaps?

Answer»

What are miscelles?

How are they related with soaps?

Discussion

12403.	what gas is evolved if ch3cooh reacts with washing soda
Answer» what gas is evolved if ch3cooh reacts with washing soda

Discussion

12404.	(a) When nitric acid is prepared by the action of concentrated sulphuric acid on potassium nitrate, what is the special feature of the apparatus used? (b) Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid. (c) Potassium nitrate is prepared from potassium hydroxide and nitric acid. Name the type of this reaction. (d) Which gas is produced when potassium nitrate is heated? Write the equation for the reaction. [5 MARKS]
Answer» (a) When nitric acid is prepared by the action of concentrated sulphuric acid on potassium nitrate, what is the special feature of the apparatus used? (b) Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid. (c) Potassium nitrate is prepared from potassium hydroxide and nitric acid. Name the type of this reaction. (d) Which gas is produced when potassium nitrate is heated? Write the equation for the reaction. [5 MARKS]

Discussion

12405.	What is combination reaction.Give three examples.
Answer» What is combination reaction.Give three examples.

Discussion

12406.	Why benzene is not called hexene though it has 6 carbon atoms.
Answer» Why benzene is not called hexene though it has 6 carbon atoms.

Discussion

12407.	The gas evolved on heating baking soda is:
Answer» The gas evolved on heating baking soda is:

Discussion

12408.	A group 14 element that evolves hydrogen gas when treated with sodium hydroxide solution is:
Answer» A group 14 element that evolves hydrogen gas when treated with sodium hydroxide solution is:

Discussion

12409.	The general formula of alkanes is:
Answer» The general formula of alkanes is:

Discussion

12410.	The ability of carbon atom to link with another carbon atom and thus forming long chains is known as __.
Answer» The ability of carbon atom to link with another carbon atom and thus forming long chains is known as __.

Discussion

12411.	What name is given to those metal oxides which show basic as well as acidic behaviour?
Answer» What name is given to those metal oxides which show basic as well as acidic behaviour?

Discussion

12412.	10 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralize it will be: (a) 4 mL (b) 8 mL (c) 12 mL (d) 16 mL
Answer» 10 mL of a solution of $N a O H$ is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of $N a O H$ , the amount of HCl solution (the same solution as before) required to neutralize it will be: (a) 4 mL (b) 8 mL (c) 12 mL (d) 16 mL

12412.

10 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralize it will be: (a) 4 mL (b) 8 mL (c) 12 mL (d) 16 mL

Answer»

10 mL of a solution of $N a O H$ is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of $N a O H$ , the amount of HCl solution (the same solution as before) required to neutralize it will be:

(a) 4 mL

(b) 8 mL

(c) 12 mL

(d) 16 mL

Discussion

12413.	What is the functional group present in the given compound?
Answer» What is the functional group present in the given compound?

12413.

What is the functional group present in the given compound?

Answer»

What is the functional group present in the given compound?

Discussion

12414.	Unit of unsaturation in compound (A) ?
Answer» Unit of unsaturation in compound (A) ?

12414.

Unit of unsaturation in compound (A) ?

Answer»

Unit of unsaturation in compound (A) ?

Discussion

12415.	Question 5 (a) An atom has electronic configuration 2, 8, 7. What is the atomic number of this element?
Answer» Question 5 (a) An atom has electronic configuration 2, 8, 7. What is the atomic number of this element?

Discussion

12416.	The three imaginary elements X, Y and Z represent a Dobernener’s triad. If the atomic mass of element X is 14 and that of element Y is 46, then the atomic mass of element Z will be : (a) 28 (b) 60 (c) 78 (d) 72
Answer» The three imaginary elements X, Y and Z represent a Dobernener’s triad. If the atomic mass of element X is 14 and that of element Y is 46, then the atomic mass of element Z will be : (a) 28 (b) 60 (c) 78 (d) 72

12416.

The three imaginary elements X, Y and Z represent a Dobernener’s triad. If the atomic mass of element X is 14 and that of element Y is 46, then the atomic mass of element Z will be : (a) 28 (b) 60 (c) 78 (d) 72

Answer»

The three imaginary elements X, Y and Z represent a Dobernener’s triad. If the atomic mass of element X is 14 and that of element Y is 46, then the atomic mass of element Z will be :

(a) 28 (b) 60 (c) 78 (d) 72

Discussion

12417.	Which of the following salt can be used as a cleaning agent for domestic purposes?
Answer» Which of the following salt can be used as a cleaning agent for domestic purposes?

Discussion

12418.	Question 8 The proper representation of a series combination of cells (Figure) obtaining maximum potential is (a) (i) (b) (ii) (c) (iii) (d) (iv)
Answer» Question 8 The proper representation of a series combination of cells (Figure) obtaining maximum potential is (a) (i) (b) (ii) (c) (iii) (d) (iv)

Discussion

12419.	Which of the following is not a member of a homologous series?
Answer» Which of the following is not a member of a homologous series?

Discussion

12420.	What is metalergy?
Answer» What is metalergy?

Discussion

12421.	What are some examples of metallic bond and their combination Is copper wire is a part of metallic bondage
Answer» What are some examples of metallic bond and their combination Is copper wire is a part of metallic bondage

12421.

What are some examples of metallic bond and their combination Is copper wire is a part of metallic bondage

Answer»

What are some examples of metallic bond and their combination

Is copper wire is a part of metallic bondage

Discussion

12422.	Find out the process of oxidation , reduction. And oxidising agent ,reducing agent from the following. 1. MnO2 + 4HCL ➡ MnCl2 + 2H2O + Cl2 2.H2S + SO2 ➡ S+ H2O 3.CuO + C ➡ Cu + CO
Answer» Find out the process of oxidation , reduction. And oxidising agent ,reducing agent from the following. 1. MnO₂ + 4HCL ➡ MnCl₂ + 2H₂O + Cl₂ 2.H₂S + SO₂➡ S+ H₂O 3.CuO + C ➡ Cu + CO

12422.

Find out the process of oxidation , reduction. And oxidising agent ,reducing agent from the following. 1. MnO2 + 4HCL ➡ MnCl2 + 2H2O + Cl2 2.H2S + SO2 ➡ S+ H2O 3.CuO + C ➡ Cu + CO

Answer»

Find out the process of oxidation , reduction. And oxidising agent ,reducing agent from the following.

1. MnO₂ + 4HCL ➡ MnCl₂ + 2H₂O + Cl₂

2.H₂S + SO₂➡ S+ H₂O

3.CuO + C ➡ Cu + CO

Discussion

12423.	How to find neutron?
Answer» How to find neutron?

Discussion

12424.	Complete and balance the following reaction: K2O+H2O=?
Answer» Complete and balance the following reaction: K2O+H2O=?

Discussion

12425.	Balance: CH4+O2 gives CO2+ H2O.
Answer» Balance: CH₄+O₂ gives CO₂+ H₂O.

Discussion

12426.	The correct IUPAC name of the alcohol [(CH3)2CH]3COH is
Answer» The correct IUPAC name of the alcohol $[(C H_{3})_{2} C H]_{3} C O H$ is

Discussion

12427.	The elements of groups,1, 2, 13, 14, 15, 16 and 17 are collectively called-
Answer» The elements of groups,1, 2, 13, 14, 15, 16 and 17 are collectively called-

Discussion

12428.	Which of the following statements is correct?
Answer» Which of the following statements is correct?

Discussion

12429.	(a) With the help of examples, describe how metal oxides differ from non-metal oxides. (b) Which of the following elements would yield: 9i) an acidic oxide, (ii) a basic oxide, and (iii) a neutral oxide? Na, S, C, K, H
Answer» (a) With the help of examples, describe how metal oxides differ from non-metal oxides. (b) Which of the following elements would yield: 9i) an acidic oxide, (ii) a basic oxide, and (iii) a neutral oxide? Na, S, C, K, H

Discussion

12430.	A diamond-toothed saw is usually used for cutting : (a) steel girders (b) logs of wood (c) marble slabs (d) asbestos sheets
Answer» A diamond-toothed saw is usually used for cutting : (a) steel girders (b) logs of wood (c) marble slabs (d) asbestos sheets

Discussion

12431.	What are lanthanides?
Answer» What are lanthanides?

Discussion

12432.	(a) What is the nature of the oxide SO2? What happens when it is dissolved in water? Write the chemical equation of the reaction involved. (b) What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
Answer» (a) What is the nature of the oxide $S O_{2}$ ? What happens when it is dissolved in water? Write the chemical equation of the reaction involved. (b) What is the nature of the oxide $N a_{2} O$ ? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.

Discussion

12433.	A solution reacts with zinc granules to give a gas which burns with a 'pop' sound. The solution contains : (a) Mg(OH)2 (b) Na2CO3 (c) NaCl (d) HCl
Answer» A solution reacts with zinc granules to give a gas which burns with a 'pop' sound. The solution contains : (a) $M g (O H)_{2}$ (b) $N a_{2} C O_{3}$ (c) $N a C l$ (d) $H C l$

12433.

A solution reacts with zinc granules to give a gas which burns with a 'pop' sound. The solution contains : (a) Mg(OH)2 (b) Na2CO3 (c) NaCl (d) HCl

Answer»

A solution reacts with zinc granules to give a gas which burns with a 'pop' sound. The solution contains :

(a) $M g (O H)_{2}$

(b) $N a_{2} C O_{3}$

(c) $N a C l$

(d) $H C l$

Discussion

12434.	Is hybridisation a result of interference? If an atomic orbital is hybridised then does the orbitals interfere with each other and produce a new shape?
Answer» Is hybridisation a result of interference? If an atomic orbital is hybridised then does the orbitals interfere with each other and produce a new shape?

Discussion

12435.	The number of atoms present in 4.25 grams of NH3 is approximately________.
Answer» The number of atoms present in $4.25 g r a m s$ of $N H_{3}$ is approximately________.

Discussion

12436.	Representative elements belong to
Answer» Representative elements belong to

Discussion

12437.	The ionization energy of F− is 320 kJ/mole. The electron gain enthalpy of fluorine is:
Answer» The ionization energy of $F^{-}$ is 320 kJ/mole. The electron gain enthalpy of fluorine is:

Discussion

12438.	Complete and balance the following equations. State the conditions wherever necessary. (a) CH≡CH+H2→ ______ +H2→_________ (b) C2H4+Br2→ _________ (c) C2H4+HCl→ _________ (d) CaC2+H2O→ _________ (e) C2H2+Br2→_________ (f) C2H5OH[O]−−−−−→K2Cr2O7 _________
Answer» Complete and balance the following equations. State the conditions wherever necessary. (a) $C H \equiv C H + H_{2} \to$ ______ $+ H_{2} \to$ _________ (b) $C_{2} H_{4} + B r_{2} \to$ _________ (c) $C_{2} H_{4} + H C l \to$ _________ (d) $C a C_{2} + H_{2} O \to$ _________ (e) $C_{2} H_{2} + B r_{2} \to$ _________ (f) $C_{2} H_{5} O H [O] - ---- \to K_{2} C r_{2} O_{7}$ _________

Discussion

12439.	A solution of copper sulphate, zinc sulphate, lead sulphate and silver nitrate of same concentration are taken in beakers. A zinc rod is dipped in each solution separately. In which beaker(s) will you observe the displacement reaction?
Answer» A solution of copper sulphate, zinc sulphate, lead sulphate and silver nitrate of same concentration are taken in beakers. A zinc rod is dipped in each solution separately. In which beaker(s) will you observe the displacement reaction?

Discussion

12440.	Calculate the solubility for 36 g of KCl in 72 g of solvent at room temperature.
Answer» Calculate the solubility for 36 g of KCl in 72 g of solvent at room temperature.

Discussion

12441.	Element M forms a chloride with the formula MCl2 which is a solid with high melting point. M would most likely be in the group in which .................. is placed. [(a) Na (b) Mg (c) Al (d) Si. ]
Answer» Element M forms a chloride with the formula $M C l_{2}$ which is a solid with high melting point. M would most likely be in the group in which .................. is placed. [(a) Na (b) Mg (c) Al (d) Si. ]

12441.

Element M forms a chloride with the formula MCl2 which is a solid with high melting point. M would most likely be in the group in which .................. is placed. [(a) Na (b) Mg (c) Al (d) Si. ]

Answer»

Element M forms a chloride with the formula $M C l_{2}$ which is a solid with high melting point. M would most likely be in the group in which .................. is placed.

[(a) Na (b) Mg (c) Al (d) Si. ]

Discussion

12442.	Choose the element with correct dot structure.
Answer» Choose the element with correct dot structure.

Discussion

12443.	Impurities deposited during purification of copper by refining is called___
Answer» Impurities deposited during purification of copper by refining is called___

Discussion

12444.	Match the reactants with their respective products formed, on reacting with HCl.
Answer» Match the reactants with their respective products formed, on reacting with $H C l$ .

Discussion

12445.	C+O2=CO2 Is the above reaction a combination reaction or an oxidation reaction or both ?
Answer» C+O₂₌CO₂ Is the above reaction a combination reaction or an oxidation reaction or both ?

Discussion

12446.	Which of these reactions release a gas which burns with a pop sound?
Answer» Which of these reactions release a gas which burns with a pop sound?

Discussion

12447.	What is the amount of sulphuric acid require to neutralise completely 8g of caustic soda? Sir,can you provide me more such questions with answers.
Answer» What is the amount of sulphuric acid require to neutralise completely 8g of caustic soda? Sir,can you provide me more such questions with answers.

Discussion

12448.	Define strong acid and weak acids with examples?
Answer» Define strong acid and weak acids with examples?

Discussion

12449.	A sample contains 22 g of carbon dioxide. This is equal to:
Answer» A sample contains 22 g of carbon dioxide. This is equal to:

Discussion

12450.	Simple differentiation between alkanes, alkenes and alkynes.
Answer» Simple differentiation between alkanes, alkenes and alkynes.

Discussion

Explore topic-wise InterviewSolutions in .

Number of moles of electrons present in 3.0115×1024 particles of CO2 is:

What are miscelles? How are they related with soaps?

what gas is evolved if ch3cooh reacts with washing soda

What is combination reaction.Give three examples.

Why benzene is not called hexene though it has 6 carbon atoms.

The gas evolved on heating baking soda is:

A group 14 element that evolves hydrogen gas when treated with sodium hydroxide solution is:

The general formula of alkanes is:

The ability of carbon atom to link with another carbon atom and thus forming long chains is known as __.

What name is given to those metal oxides which show basic as well as acidic behaviour?

10 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralize it will be: (a) 4 mL (b) 8 mL (c) 12 mL (d) 16 mL

What is the functional group present in the given compound?

Unit of unsaturation in compound (A) ?

Question 5 (a) An atom has electronic configuration 2, 8, 7. What is the atomic number of this element?

The three imaginary elements X, Y and Z represent a Dobernener’s triad. If the atomic mass of element X is 14 and that of element Y is 46, then the atomic mass of element Z will be : (a) 28 (b) 60 (c) 78 (d) 72

Which of the following salt can be used as a cleaning agent for domestic purposes?

Question 8 The proper representation of a series combination of cells (Figure) obtaining maximum potential is (a) (i) (b) (ii) (c) (iii) (d) (iv)

Which of the following is not a member of a homologous series?

What is metalergy?

What are some examples of metallic bond and their combination Is copper wire is a part of metallic bondage

Find out the process of oxidation , reduction. And oxidising agent ,reducing agent from the following. 1. MnO2 + 4HCL ➡ MnCl2 + 2H2O + Cl2 2.H2S + SO2 ➡ S+ H2O 3.CuO + C ➡ Cu + CO

How to find neutron?

Complete and balance the following reaction: K2O+H2O=?

Balance: CH​​​​​4+O​​​​​​2 gives CO​​​​​2+ H2O.

The correct IUPAC name of the alcohol [(CH3)2CH]3COH is

The elements of groups,1, 2, 13, 14, 15, 16 and 17 are collectively called-

Which of the following statements is correct?

(a) With the help of examples, describe how metal oxides differ from non-metal oxides. (b) Which of the following elements would yield: 9i) an acidic oxide, (ii) a basic oxide, and (iii) a neutral oxide? Na, S, C, K, H

A diamond-toothed saw is usually used for cutting : (a) steel girders (b) logs of wood (c) marble slabs (d) asbestos sheets

What are lanthanides?

(a) What is the nature of the oxide SO2? What happens when it is dissolved in water? Write the chemical equation of the reaction involved. (b) What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.

A solution reacts with zinc granules to give a gas which burns with a 'pop' sound. The solution contains : (a) Mg(OH)2 (b) Na2CO3 (c) NaCl (d) HCl

Is hybridisation a result of interference? If an atomic orbital is hybridised then does the orbitals interfere with each other and produce a new shape?

The number of atoms present in 4.25 grams of NH3 is approximately________.

Representative elements belong to

The ionization energy of F− is 320 kJ/mole. The electron gain enthalpy of fluorine is:

Complete and balance the following equations. State the conditions wherever necessary. (a) CH≡CH+H2→ ______ +H2→_________ (b) C2H4+Br2→ _________ (c) C2H4+HCl→ _________ (d) CaC2+H2O→ _________ (e) C2H2+Br2→_________ (f) C2H5OH[O]−−−−−→K2Cr2O7 _________

A solution of copper sulphate, zinc sulphate, lead sulphate and silver nitrate of same concentration are taken in beakers. A zinc rod is dipped in each solution separately. In which beaker(s) will you observe the displacement reaction?

Calculate the solubility for 36 g of KCl in 72 g of solvent at room temperature.

Element M forms a chloride with the formula MCl2 which is a solid with high melting point. M would most likely be in the group in which .................. is placed. [(a) Na (b) Mg (c) Al (d) Si. ]

Choose the element with correct dot structure.

Impurities deposited during purification of copper by refining is called___

Match the reactants with their respective products formed, on reacting with HCl.

C+O​​​​​​2=CO​​​​​2 Is the above reaction a combination reaction or an oxidation reaction or both ?

Which of these reactions release a gas which burns with a pop sound?

What is the amount of sulphuric acid require to neutralise completely 8g of caustic soda? Sir,can you provide me more such questions with answers.

Define strong acid and weak acids with examples?

A sample contains 22 g of carbon dioxide. This is equal to:

Simple differentiation between alkanes, alkenes and alkynes.

Balance: CH4+O2 gives CO2+ H2O.

Complete and balance the following equations. State the conditions wherever necessary. (a) CH≡CH+H2→ __ +H2→_ (b) C2H4+Br2→ _ (c) C2H4+HCl→ _ (d) CaC2+H2O→ _ (e) C2H2+Br2→_ (f) C2H5OH[O]−−−−−→K2Cr2O7 _____

C+O2=CO2 Is the above reaction a combination reaction or an oxidation reaction or both ?