15280 + Interview Questions in Chemistry Page 201 InterviewSolution

10001.	Which is correct sulphuric or sulfuric
Answer» Which is correct sulphuric or sulfuric

Discussion

10002.	As per __ law, equal volumes of all gases under the same conditions of temperature and pressure contain an equal number of molecules.
Answer» As per __ law, equal volumes of all gases under the same conditions of temperature and pressure contain an equal number of molecules.

Discussion

10003.	How is the property of metal lusture is connected to a photon ?
Answer» How is the property of metal lusture is connected to a photon ?

Discussion

10004.	The isomerism exhibited by the given compounds below is
Answer» The isomerism exhibited by the given compounds below is

10004.

The isomerism exhibited by the given compounds below is

Answer»

The isomerism exhibited by the given compounds below is

Discussion

10005.	As2S3+X––NO−3+Y––H+→2ASO3−4+Z––NO2+A––S+2H2O Here X,Y,Z and A respectively are
Answer» $A s_{2} S_{3} + X - - N O_{3}^{-} + Y - - H^{+} \to 2 A S O_{4}^{3 -} + Z - - N O_{2} + A - - S + 2 H_{2} O$ Here X,Y,Z and A respectively are

Discussion

10006.	Which of the following is an example of double displacement reaction? (i) CO2(g)+H2(g)→CO(g)+H2O(g) (ii) P4O10(s)+6H2O(l)→4H3PO4(aq) (iii) H2+O2→H2O (iv) CaCl2(aq)+Na2CO3(aq)→CaCO3(aq)+2NaCl(aq)
Answer» Which of the following is an example of double displacement reaction? (i) $C O_{2} (g) + H_{2} (g) \to C O (g) + H_{2} O (g)$ (ii) $P_{4} O_{10} (s) + 6 H_{2} O (l) \to 4 H_{3} P O_{4} (a q)$ (iii) $H_{2} + O_{2} \to H_{2} O$ (iv) $C a C l_{2} (a q) + N a_{2} C O_{3} (a q) \to C a C O_{3} (a q) + 2 N a C l (a q)$

Discussion

10007.	The salt formed when aluminium oxide reacts with potassium hydroxide is:
Answer» The salt formed when aluminium oxide reacts with potassium hydroxide is:

Discussion

10008.	The hybridisation of atomic orbital of Nitrogen in NO−3,NO+2,NH+4 respectively:
Answer» The hybridisation of atomic orbital of Nitrogen in $N O_{3}^{-}, N O_{2}^{+}, N H_{4}^{+}$ respectively:

Discussion

10009.	What is neutralisation reaction? And it's chemical reaction examples.
Answer» What is neutralisation reaction? And it's chemical reaction examples.

Discussion

10010.	Name two elements whose properties were predicted on the basis of their positions in Mendeleev’s periodic table.
Answer» Name two elements whose properties were predicted on the basis of their positions in Mendeleev’s periodic table.

Discussion

10011.	Which of the following pair will undergo a displacement reaction?
Answer» Which of the following pair will undergo a displacement reaction?

10011.

Which of the following pair will undergo a displacement reaction?

Answer»

Which of the following pair will undergo a displacement reaction?

Discussion

10012.	Select the correct option about the oxidizing agent.
Answer» Select the correct option about the oxidizing agent.

Discussion

10013.	Define polar covalent bond.
Answer» Define polar covalent bond.

Discussion

10014.	Which of the following precipitate is formed on mixing sodium sulphate with barium chloride solution A) black precipitate of Barium sulphate B) white precipitate of Barium sulphate C) red precipitate of Barium sulphate D) blue precipitate of Barium sulphate
Answer» Which of the following precipitate is formed on mixing sodium sulphate with barium chloride solution A) black precipitate of Barium sulphate B) white precipitate of Barium sulphate C) red precipitate of Barium sulphate D) blue precipitate of Barium sulphate

10014.

Which of the following precipitate is formed on mixing sodium sulphate with barium chloride solution A) black precipitate of Barium sulphate B) white precipitate of Barium sulphate C) red precipitate of Barium sulphate D) blue precipitate of Barium sulphate

Answer»

Which of the following precipitate is formed on mixing sodium sulphate with barium chloride solution

A) black precipitate of Barium sulphate

B) white precipitate of Barium sulphate

C) red precipitate of Barium sulphate

D) blue precipitate of Barium sulphate

Discussion

10015.	What is ph level?
Answer» What is ph level?

Discussion

10016.	Bronze is an alloy of:
Answer» Bronze is an alloy of:

Discussion

10017.	Which of the following compounds can have a double bond? C4H10; C5H8; C5H10
Answer» Which of the following compounds can have a double bond? $C_{4} H_{10}; C_{5} H_{8}; C_{5} H_{10}$

Discussion

10018.	In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields?
Answer» In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields?

Discussion

10019.	do metal oxides reacts with non metal oxides ? why ? what are the products ? give example ?
Answer» do metal oxides reacts with non metal oxides ? why ? what are the products ? give example ?

Discussion

10020.	What are trands ?
Answer» What are trands ?

Discussion

10021.	it is said that in the valence shell of lithium one proton is pulling one electron and in berilium two protons are pulling two electrons. but the atomic radius of lithium is bigger than berilium.if the amount of attraction according to their valency will be equal. then why?
Answer» it is said that in the valence shell of lithium one proton is pulling one electron and in berilium two protons are pulling two electrons. but the atomic radius of lithium is bigger than berilium.if the amount of attraction according to their valency will be equal. then why?

Discussion

10022.	(a) What happens when ethanol is oxidised with alkaline potassium permanganate (or acidified potassium dichromate)? Write the equation of the reaction involved. (b) Choose those compounds from the following which can turn blue litmus solution red : HCHO, CH3COOH, CH3OH, C2H5OH, HCOOH, CH3CHO Give reasons for your choice.
Answer» (a) What happens when ethanol is oxidised with alkaline potassium permanganate (or acidified potassium dichromate)? Write the equation of the reaction involved. (b) Choose those compounds from the following which can turn blue litmus solution red : $H C H O, C H_{3} C O O H, C H_{3} O H, C_{2} H_{5} O H, H C O O H, C H_{3} C H O$ Give reasons for your choice.

Discussion

10023.	Write IUPAC names of the following CH3-CH2-CH=CH2 CH3-CH2-CH2-C(CH3)2-CH3 CH3-CH2-CHO CH3-CH(OH)-CH3 CH3-CH2-CH2-COOH
Answer» Write IUPAC names of the following CH3-CH2-CH=CH2 CH3-CH2-CH2-C(CH3)2-CH3 CH3-CH2-CHO CH3-CH(OH)-CH3 CH3-CH2-CH2-COOH

Discussion

10024.	Describe the setup of a Leclanche cell.
Answer» Describe the setup of a Leclanche cell.

Discussion

10025.	Pentan-2-one and 3-methylbutan-2-one are a pair of
Answer» Pentan-2-one and 3-methylbutan-2-one are a pair of

Discussion

10026.	The total number of valence electrons in 4.2 gm of N3− ion is (NA is the Avogadro's number)
Answer» The total number of valence electrons in 4.2 gm of ${N_{3}}^{-}$ ion is ( $N_{A}$ is the Avogadro's number)

10026.

The total number of valence electrons in 4.2 gm of N3− ion is (NA is the Avogadro's number)

Answer»

The total number of valence electrons in 4.2 gm of ${N_{3}}^{-}$ ion is ( $N_{A}$ is the Avogadro's number)

Discussion

10027.	Given alongside is a part of the periodic table : LiBe BCNOFNaMgAlSiPSCl As we move horizontally from left to right : (i) What happens to the metallic character of the elements ? (ii) What happens to the atomic size ?
Answer» Given alongside is a part of the periodic table : $\begin{matrix} L i & B e & B & C & N & O & F N a & M g & A l & S i & P & S & C l \end{matrix}$ As we move horizontally from left to right : (i) What happens to the metallic character of the elements ? (ii) What happens to the atomic size ?

10027.

Given alongside is a part of the periodic table : LiBe BCNOFNaMgAlSiPSCl As we move horizontally from left to right : (i) What happens to the metallic character of the elements ? (ii) What happens to the atomic size ?

Answer»

Given alongside is a part of the periodic table :

$\begin{matrix} L i & B e & B & C & N & O & F N a & M g & A l & S i & P & S & C l \end{matrix}$

As we move horizontally from left to right :

(i) What happens to the metallic character of the elements ?

(ii) What happens to the atomic size ?

Discussion

10028.	A student dropped few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was then passed through lime water . What change would be observed in lime water ? What will happen if excess gas is passed through the lime water ? With the help of Balanced chemical equation for all the changes explain the observation.
Answer» A student dropped few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was then passed through lime water . What change would be observed in lime water ? What will happen if excess gas is passed through the lime water ? With the help of Balanced chemical equation for all the changes explain the observation.

Discussion

10029.	What are the chemical effects of electric current?
Answer» What are the chemical effects of electric current?

Discussion

10030.	P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn : (a) blue litmus red? (b) red litmus blue?
Answer» P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn : (a) blue litmus red? (b) red litmus blue?

10030.

P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn : (a) blue litmus red? (b) red litmus blue?

Answer»

P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn :

(a) blue litmus red?

(b) red litmus blue?

Discussion

10031.	Question 20.3 Write the balanced chemical equation for the following reaction and identify the type of reaction. Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.
Answer» Question 20.3 Write the balanced chemical equation for the following reaction and identify the type of reaction. Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.

Discussion

10032.	While preparing hydrochloric acid back suction can be avoided by
Answer» While preparing hydrochloric acid back suction can be avoided by

Discussion

10033.	Question 14 Which of the following elements would lose an electron easily? (a) Mg (b) Na (c) K (d) Ca
Answer» Question 14 Which of the following elements would lose an electron easily? (a) Mg (b) Na (c) K (d) Ca

Discussion

10034.	what happens when bleaching powder is kept open in air
Answer» what happens when bleaching powder is kept open in air

Discussion

10035.	Which of the followings are properties of sulphuric acid
Answer» Which of the followings are properties of sulphuric acid

Discussion

10036.	In the table below some of the element of the periodic table with atomic numbers from 3 to 18 are given. These are represented by letters which are not the usual symbols of the elements. (A) Which of these: (i) is a noble gas. (ii) is a halogen. (iii) is an alkali metal. (iv) is an element with valency 4. (B) If A combines with F then what would be the formula of the resulting compound? (C) What is the electronic arrangement of G? 345678910AEG1112131415161718BCDF
Answer» In the table below some of the element of the periodic table with atomic numbers from 3 to 18 are given. These are represented by letters which are not the usual symbols of the elements. (A) Which of these: (i) is a noble gas. (ii) is a halogen. (iii) is an alkali metal. (iv) is an element with valency 4. (B) If A combines with F then what would be the formula of the resulting compound? (C) What is the electronic arrangement of G? $\begin{matrix} 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 A & E & G 11 & 12 & 13 & 14 & 15 & 16 & 17 & 18 B & C & D & F \end{matrix}$

10036.

In the table below some of the element of the periodic table with atomic numbers from 3 to 18 are given. These are represented by letters which are not the usual symbols of the elements. (A) Which of these: (i) is a noble gas. (ii) is a halogen. (iii) is an alkali metal. (iv) is an element with valency 4. (B) If A combines with F then what would be the formula of the resulting compound? (C) What is the electronic arrangement of G? 345678910AEG1112131415161718BCDF

Answer»

In the table below some of the element of the periodic table with atomic numbers from 3 to 18 are given. These are represented by letters which are not the usual symbols of the elements.
(A) Which of these:
(i) is a noble gas.
(ii) is a halogen.
(iii) is an alkali metal.
(iv) is an element with valency 4.
(B) If A combines with F then what would be the formula of the resulting compound?
(C) What is the electronic arrangement of G?

$\begin{matrix} 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 A & E & G 11 & 12 & 13 & 14 & 15 & 16 & 17 & 18 B & C & D & F \end{matrix}$

Discussion

10037.	When we eat the food HCL in our stomach break down the food.And when we drink water the HCL acid should be come dilute and food should not break down.
Answer» When we eat the food HCL in our stomach break down the food.And when we drink water the HCL acid should be come dilute and food should not break down.

Discussion

10038.	Find the molarity of H2SO4 solution having pH value equal to 5
Answer» Find the molarity of H2SO4 solution having pH value equal to 5

Discussion

10039.	What happens when calcium bisulphite reacts with dilute nitric acid?
Answer» What happens when calcium bisulphite reacts with dilute nitric acid?

Discussion

10040.	A road tanker carrying an acid was involved in an accident and its contents spilled on the road. At the side of the road, iron drain covers began melting and fizzing as the acid ran over them. A specialist was called to see if the acid actually leaked into the nearby river. (a) Explain how the specialist could carry out a simple test to see if the river water contains some acid or not. (b) Explain why drain covers began fizzing as the acid rain over them.
Answer» A road tanker carrying an acid was involved in an accident and its contents spilled on the road. At the side of the road, iron drain covers began melting and fizzing as the acid ran over them. A specialist was called to see if the acid actually leaked into the nearby river. (a) Explain how the specialist could carry out a simple test to see if the river water contains some acid or not. (b) Explain why drain covers began fizzing as the acid rain over them.

Discussion

10041.	A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to 3.8×10−5 torr at 00 C. The number of molecules of the gas remaining in the tube is
Answer» A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to $3.8 \times 10^{- 5}$ torr at $0^{0} C$ . The number of molecules of the gas remaining in the tube is

Discussion

10042.	Complete the following equations : (a) CH3CH2OHConc. H2SO4−−−−−−−−→170∘C (b) CH3COOH+C2H5OHConc. H2SO4−−−−−−−−→
Answer» Complete the following equations : (a) $C H_{3} C H_{2} O H C o n c . H_{2} S O_{4} - ------- \to 170^{\circ} C$ (b) $C H_{3} C O O H + C_{2} H_{5} O H C o n c . H_{2} S O_{4} - ------- \to$

Discussion

10043.	1.5 m3 of water is mixed with 0.50 m3 of alcohol. The density of water is 1000 kg m–3 and the density of alcohol is 800 kg m–3. What is the density of the mixture with volume 2.0 m3?
Answer» 1.5 m3 of water is mixed with 0.50 m3 of alcohol. The density of water is 1000 kg m–3 and the density of alcohol is 800 kg m–3. What is the density of the mixture with volume 2.0 m3?

Discussion

10044.	From the following Balance Sheet of Mohan Ltd., prepare cash flow statement. Balance Sheet of Mohan Ltd. as on…………. Capital and Liabilities2010 2011 Assets2010 2011 (Rs.) (Rs.) (Rs.) (Rs.) Equity Share Capital2,00,0003,00,000Fixed Assets4,00,0006,00,000Profit and Loss1,60,0002,00,000Stock1,30,0001,50,000Bank Loan1,00,00080,000Debtors1,00,00060,000Accumulated Depreciation80,0001,00,000Bills Receivable20,00030,000Creditors1,40,0001,20,000Bank90,00030,000Proposed Dividend60,000––––––––70,000––––––––7,40,000––––––––––8,70,000––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯7,40,000––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯8,70,000–––––––––– Additional Information: Machine costing Rs. 80,000 on which accumulated depreciation was Rs. 50,000 was sold for Rs. 20,000.
Answer» From the following Balance Sheet of Mohan Ltd., prepare cash flow statement. Balance Sheet of Mohan Ltd. as on…………. $\begin{matrix} Capital and Liabilities & 2010 & 2011 & Assets & 2010 & 2011 (Rs.) & (Rs.) & (Rs.) & (Rs.) Equity Share Capital & 2, 00, 000 & 3, 00, 000 & Fixed Assets & 4, 00, 000 & 6, 00, 000 Profit and Loss & 1, 60, 000 & 2, 00, 000 & Stock & 1, 30, 000 & 1, 50, 000 Bank Loan & 1, 00, 000 & 80, 000 & Debtors & 1, 00, 000 & 60, 000 Accumulated Depreciation & 80, 000 & 1, 00, 000 & Bills Receivable & 20, 000 & 30, 000 Creditors & 1, 40, 000 & 1, 20, 000 & Bank & 90, 000 & 30, 000 Proposed Dividend & 60, 000 - ------ - & 70, 000 - ------ - 7, 40, 000 - -------- - & 8, 70, 000 - -------- - & ¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯ 7, 40, 000 - -------- - & ¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯ 8, 70, 000 - -------- - \end{matrix}$ Additional Information: Machine costing Rs. 80,000 on which accumulated depreciation was Rs. 50,000 was sold for Rs. 20,000.

Discussion

10045.	In a wave which quantity is transferred from one point to the other.
Answer» In a wave which quantity is transferred from one point to the other.

Discussion

10046.	Write the balanced equations for the preparation of the following salts in the laboratory : (a) A soluble sulphate by the action of an acid on an insoluble base, (b) An insoluble salt by the action of an acid on another salt, (c) An insoluble base by the action of a soluble base on a soluble salt, (d) A soluble sulphate by the action of an acid on a metal.
Answer» Write the balanced equations for the preparation of the following salts in the laboratory : (a) A soluble sulphate by the action of an acid on an insoluble base, (b) An insoluble salt by the action of an acid on another salt, (c) An insoluble base by the action of a soluble base on a soluble salt, (d) A soluble sulphate by the action of an acid on a metal.

10046.

Write the balanced equations for the preparation of the following salts in the laboratory : (a) A soluble sulphate by the action of an acid on an insoluble base, (b) An insoluble salt by the action of an acid on another salt, (c) An insoluble base by the action of a soluble base on a soluble salt, (d) A soluble sulphate by the action of an acid on a metal.

Answer»

Write the balanced equations for the preparation of the following salts in the laboratory :

(a) A soluble sulphate by the action of an acid on an insoluble base,

(b) An insoluble salt by the action of an acid on another salt,

(c) An insoluble base by the action of a soluble base on a soluble salt,

(d) A soluble sulphate by the action of an acid on a metal.

Discussion

10047.	The difference in the atomic structures of Isotopes is
Answer» The difference in the atomic structures of Isotopes is

Discussion

10048.	Why do some atoms react while others don't?
Answer» Why do some atoms react while others don't?

Discussion

10049.	Two coherent sources of light can be obtained by [MH CET 2001]
Answer» Two coherent sources of light can be obtained by [MH CET 2001]

10049.

Two coherent sources of light can be obtained by [MH CET 2001]

Answer»

Two coherent sources of light can be obtained by

[MH CET 2001]

Discussion

10050.	A student has been collecting silver coins and copper coins. One day she observed a black coating on silver coins and a green coating on copper coins. Which chemical phenomenon is responsible for these coatings? Write the names of black and green coatings.
Answer» A student has been collecting silver coins and copper coins. One day she observed a black coating on silver coins and a green coating on copper coins. Which chemical phenomenon is responsible for these coatings? Write the names of black and green coatings.

Discussion

Explore topic-wise InterviewSolutions in .

Which is correct sulphuric or sulfuric

As per __ law, equal volumes of all gases under the same conditions of temperature and pressure contain an equal number of molecules.

How is the property of metal lusture is connected to a photon ?

The isomerism exhibited by the given compounds below is

As2S3+X––NO−3+Y––H+→2ASO3−4+Z––NO2+A––S+2H2O Here X,Y,Z and A respectively are

Which of the following is an example of double displacement reaction? (i) CO2(g)+H2(g)→CO(g)+H2O(g) (ii) P4O10(s)+6H2O(l)→4H3PO4(aq) (iii) H2+O2→H2O (iv) CaCl2(aq)+Na2CO3(aq)→CaCO3(aq)+2NaCl(aq)

The salt formed when aluminium oxide reacts with potassium hydroxide is:

The hybridisation of atomic orbital of Nitrogen in NO−3,NO+2,NH+4 respectively:

What is neutralisation reaction? And it's chemical reaction examples.

Name two elements whose properties were predicted on the basis of their positions in Mendeleev’s periodic table.

Which of the following pair will undergo a displacement reaction?

Select the correct option about the oxidizing agent.

Define polar covalent bond.

Which of the following precipitate is formed on mixing sodium sulphate with barium chloride solution A) black precipitate of Barium sulphate B) white precipitate of Barium sulphate C) red precipitate of Barium sulphate D) blue precipitate of Barium sulphate

What is ph level?

Bronze is an alloy of:

Which of the following compounds can have a double bond? C4H10; C5H8; C5H10

In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields?

do metal oxides reacts with non metal oxides ? why ? what are the products ? give example ?

What are trands ?

it is said that in the valence shell of lithium one proton is pulling one electron and in berilium two protons are pulling two electrons. but the atomic radius of lithium is bigger than berilium.if the amount of attraction according to their valency will be equal. then why?

Write IUPAC names of the following CH3-CH2-CH=CH2 CH3-CH2-CH2-C(CH3)2-CH3 CH3-CH2-CHO CH3-CH(OH)-CH3 CH3-CH2-CH2-COOH

Describe the setup of a Leclanche cell.

Pentan-2-one and 3-methylbutan-2-one are a pair of

The total number of valence electrons in 4.2 gm of N3− ion is (NA is the Avogadro's number)

Given alongside is a part of the periodic table : LiBe BCNOFNaMgAlSiPSCl As we move horizontally from left to right : (i) What happens to the metallic character of the elements ? (ii) What happens to the atomic size ?

What are the chemical effects of electric current?

P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn : (a) blue litmus red? (b) red litmus blue?

Question 20.3 Write the balanced chemical equation for the following reaction and identify the type of reaction. Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.

While preparing hydrochloric acid back suction can be avoided by

Question 14 Which of the following elements would lose an electron easily? (a) Mg (b) Na (c) K (d) Ca

what happens when bleaching powder is kept open in air

Which of the followings are properties of sulphuric acid

When we eat the food HCL in our stomach break down the food.And when we drink water the HCL acid should be come dilute and food should not break down.

Find the molarity of H2SO4 solution having pH value equal to 5

What happens when calcium bisulphite reacts with dilute nitric acid?

A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to 3.8×10−5 torr at 00 C. The number of molecules of the gas remaining in the tube is

Complete the following equations : (a) CH3CH2OHConc. H2SO4−−−−−−−−→170∘C (b) CH3COOH+C2H5OHConc. H2SO4−−−−−−−−→

1.5 m3 of water is mixed with 0.50 m3 of alcohol. The density of water is 1000 kg m–3 and the density of alcohol is 800 kg m–3. What is the density of the mixture with volume 2.0 m3?

In a wave which quantity is transferred from one point to the other.

The difference in the atomic structures of Isotopes is

Why do some atoms react while others don't?

Two coherent sources of light can be obtained by [MH CET 2001]

A student has been collecting silver coins and copper coins. One day she observed a black coating on silver coins and a green coating on copper coins. Which chemical phenomenon is responsible for these coatings? Write the names of black and green coatings.