15280 + Interview Questions in Chemistry Page 105 InterviewSolution

5201.	Complete the given thermal cracking reaction: CH3CH2CH3(g)→
Answer» Complete the given thermal cracking reaction: $C H_{3} C H_{2} C H_{3} (g) \to$

5201.

Complete the given thermal cracking reaction: CH3CH2CH3(g)→

Answer»

Complete the given thermal cracking reaction:

$C H_{3} C H_{2} C H_{3} (g) \to$

5202.	What is the difference between n.f ( n factor) and acidity/basicity ?
Answer» What is the difference between n.f ( n factor) and acidity/basicity ?

Discussion

5203.	when to put mg=kx and mgx=1/kx2 in spring mass system why in some places the eq.is mg=kx{k=spring constant}and sometimes it is mgx=1/2kx2
Answer» when to put mg=kx and mgx=1/kx2 in spring mass system why in some places the eq.is mg=kx{k=spring constant} and sometimes it is mgx=1/2kx2

Discussion

5204.	Which of the following element has twice as many electrons in its second shell as it has in its first shell?
Answer» Which of the following element has twice as many electrons in its second shell as it has in its first shell?

Discussion

5205.	A gas cylinder contains 24 x 1024 molecules of nitrogen gas. If Avogadro’s number is 6 x 1023 and the relative atomic mass of nitrogen is 14, calculate:
Answer» A gas cylinder contains 24 x 10²⁴ molecules of nitrogen gas. If Avogadro’s number is 6 x 10²³ and the relative atomic mass of nitrogen is 14, calculate:

Discussion

5206.	Define or explain chain isomerism and position isomerism with an example in each case. [4 MARKS]
Answer» Define or explain chain isomerism and position isomerism with an example in each case. [4 MARKS]

Discussion

5207.	An aromatic compound " A' on treatment with aqueous ammonia and heating forms compound 'B' which on heating with Br a and KOH forms a compound 'C' { of molecular formula C_6H_7N . Write the structures and IUPAC names of compounds A. B and C.
Answer» An aromatic compound " A' on treatment with aqueous ammonia and heating forms compound 'B' which on heating with Br a and KOH forms a compound 'C' { of molecular formula C_6H_7N . Write the structures and IUPAC names of compounds A. B and C.

Discussion

5208.	In a first-order reaction, A→B, if k is rate constant and initial concentration of the reactant A is 0.5 M, then the half-life is:
Answer» In a first-order reaction, $A \to B$ , if k is rate constant and initial concentration of the reactant A is 0.5 M, then the half-life is:

Discussion

5209.	Briefly explain the working mechanism of soap.
Answer» Briefly explain the working mechanism of soap.

Discussion

5210.	25. he hydrogen bond strength will be highest for:- (1) OH----O (2) FH----O (3) OH----F (4) FH----N
Answer» 25. he hydrogen bond strength will be highest for:- (1) OH----O (2) FH----O (3) OH----F (4) FH----N

Discussion

5211.	37 A compound B,molecular formula C2H4O2 reacts with Na metal to form a compound C and evolves a gas which burns with pop sound.Compound B on treatment with an alchohol A in the presence of a mineral acid forms a sweet smelling compound D with molecular formula C3H6O2 . On addition of NaOH to B it gives C and water. D on treatment with NaOH gives back C and A. a. Name the compounds A,B,C and D b. Write the chemical equatio for B to C, B to D, D to A
Answer» 37 A compound B,molecular formula C2H4O2 reacts with Na metal to form a compound C and evolves a gas which burns with pop sound.Compound B on treatment with an alchohol A in the presence of a mineral acid forms a sweet smelling compound D with molecular formula C3H6O2 . On addition of NaOH to B it gives C and water. D on treatment with NaOH gives back C and A. a. Name the compounds A,B,C and D b. Write the chemical equatio for B to C, B to D, D to A

Discussion

5212.	When is a precipitate formed in a reation?
Answer» When is a precipitate formed in a reation?

Discussion

5213.	THE ELECTRONIC CONFIGURATION HAVING MAXIMUM DIFFERENCE IN FIRST AND SECOND IONISATION ENERGY IS OPTION A.1S2 2S2 2P6 3S2OPTION B.1S2 2S2 2P6 3S2 3P1OPTION C.1S2 2S2 2P6 3S2 3P2OPTIOND.1S2 2S2 2P6 3S1
Answer» THE ELECTRONIC CONFIGURATION HAVING MAXIMUM DIFFERENCE IN FIRST AND SECOND IONISATION ENERGY IS OPTION A.1S2 2S2 2P6 3S2 OPTION B.1S2 2S2 2P6 3S2 3P1 OPTION C.1S2 2S2 2P6 3S2 3P2 OPTIOND.1S2 2S2 2P6 3S1

Discussion

5214.	Fischer form of the following compound is
Answer» Fischer form of the following compound is

Discussion

5215.	Which of the following statement is correct?
Answer» Which of the following statement is correct?

Discussion

5216.	For 109% labelled oleum if the number of moles of H2SO4 and free SO3 be x and y then what will be the approx value of (x+y)/(x-y) Thank u
Answer» For 109% labelled oleum if the number of moles of H2SO4 and free SO3 be x and y then what will be the approx value of (x+y)/(x-y) Thank u

Discussion

5217.	corrosion of metal is generally a serious problem while corrosion of some metal is an advantage why
Answer» corrosion of metal is generally a serious problem while corrosion of some metal is an advantage why

Discussion

5218.	Choose the correct word from the brackets to complete the sentences.(i) Sulphur can be converted to sulphuric acid using ......... (concentrated/dilute) nitric acid.(ii) Write the equation for the reaction in 2 (i).
Answer» Choose the correct word from the brackets to complete the sentences. (i) Sulphur can be converted to sulphuric acid using ......... (concentrated/dilute) nitric acid. (ii) Write the equation for the reaction in 2 (i).

Discussion

5219.	2nd seperation energy of an electron in H atom 1.27.2ev 2.1.57ev 3.3.4ev 4.13.6ev
Answer» 2nd seperation energy of an electron in H atom 1.27.2ev 2.1.57ev 3.3.4ev 4.13.6ev

Discussion

5220.	Compare the process of calcination and roasting.
Answer» Compare the process of calcination and roasting.

Discussion

5221.	A Zener diode has a contact potential of 1 V in the absence of biasing. It undergoes Zener breakdown for an electric field of 106 V/m at the depletion region. If the width of the depletion region is 2.5 μm, what should be the reverse biased potential for the zener breakdown to occur ?
Answer» A Zener diode has a contact potential of $1 V$ in the absence of biasing. It undergoes Zener breakdown for an electric field of $10^{6} V/m$ at the depletion region. If the width of the depletion region is $2.5 μ m$ , what should be the reverse biased potential for the zener breakdown to occur ?

Discussion

5222.	Which of the following is a correct statement?
Answer» Which of the following is a correct statement?

Discussion

5223.	What is electrophilic reaction
Answer» What is electrophilic reaction

Discussion

5224.	Explain the product of caustic soda when reacted with aliminiumhyroxide.
Answer» Explain the product of caustic soda when reacted with aliminiumhyroxide.

Discussion

5225.	Sulphate of a metal contains 40% of metal by mass. Eqivalent wt. of metal will be(1) 16(2) 32(3) 35(4) 64
Answer» Sulphate of a metal contains 40% of metal by mass. Eqivalent wt. of metal will be (1) 16 (2) 32 (3) 35 (4) 64

Discussion

5226.	what will be the mass of 100 atoms of hydrogen?
Answer» what will be the mass of 100 atoms of hydrogen?

Discussion

5227.	An element E reacts with water to form a solution which turns phenolphthalein soluiton pink. The element E is most likely ot be: (a) S (b) Ca (c) C (d) Ag
Answer» An element E reacts with water to form a solution which turns phenolphthalein soluiton pink. The element E is most likely ot be: (a) S (b) Ca (c) C (d) Ag

5227.

An element E reacts with water to form a solution which turns phenolphthalein soluiton pink. The element E is most likely ot be: (a) S (b) Ca (c) C (d) Ag

Answer»

An element E reacts with water to form a solution which turns phenolphthalein soluiton pink. The element E is most likely ot be:

(a) S

(b) Ca

(c) C

(d) Ag

Discussion

5228.	which of the following has least acidic hydrogen?(a)R-NH3^+ (b)R-CO2H (c)R-OH (d)R-SO3H
Answer» which of the following has least acidic hydrogen? (a)R-NH3^+ (b)R-CO2H (c)R-OH (d)R-SO3H

Discussion

5229.	(a) How would you test for an alcohol? (b) Give the harmful effects of drinking alcohol. (c) Explain why, methanol is much more dangerous to drink than ethanol.
Answer» (a) How would you test for an alcohol? (b) Give the harmful effects of drinking alcohol. (c) Explain why, methanol is much more dangerous to drink than ethanol.

Discussion

5230.	A polymeric metaborate anion has molecular formula of [B3O3(OH)4]−. The number of B−O−B linkage(s) present in one molecule of the mineral is/are:
Answer» A polymeric metaborate anion has molecular formula of $[B_{3} O_{3} (O H)_{4}]^{-}$ . The number of $B - O - B$ linkage(s) present in one molecule of the mineral is/are:

Discussion

5231.	Which of the following shows maximum osmotic pressure in solution?
Answer» Which of the following shows maximum osmotic pressure in solution?

Discussion

5232.	Give the methods of the preparation of an oxide of hydrogen used as bleaching agent?
Answer» Give the methods of the preparation of an oxide of hydrogen used as bleaching agent?

Discussion

5233.	Name the ore of zinc containing its sulphide.
Answer» Name the ore of zinc containing its sulphide.

Discussion

5234.	Statement 1: School bells are made up of graphite.Statement 2: Non-metals are not sonorous.
Answer» Statement 1: School bells are made up of graphite. Statement 2: Non-metals are not sonorous.

Discussion

5235.	An Arrhenius acid is a substance that gives ions in an aqueous solution.
Answer» An Arrhenius acid is a substance that gives ions in an aqueous solution.

Discussion

5236.	Which of the following non metal has a shining surface?
Answer» Which of the following non metal has a shining surface?

Discussion

5237.	Question 41(a) Compound X and aluminium are used to join railway tracks. (a) Identify the compound X
Answer» Question 41(a) Compound X and aluminium are used to join railway tracks. (a) Identify the compound X

Discussion

5238.	One gram of activates carbon has a surface area of 1000 m2. Considering complete coverage as well as monomolecular adsorption, how much ammonia at STP would be adsorbed on the surface of 447 g carbon if a radius of a ammonia molecules is 10−8 cm.
Answer» One gram of activates carbon has a surface area of $1000 m^{2} .$ Considering complete coverage as well as monomolecular adsorption, how much ammonia at $S T P$ would be adsorbed on the surface of $\frac{44}{7} g$ carbon if a radius of a ammonia molecules is $10^{- 8} c m .$

Discussion

5239.	Caprolactam is used for the manufacture of
Answer» Caprolactam is used for the manufacture of

Discussion

5240.	23. Which of the following have highest electron gain enthalpy O^- , Mg^{2+}, Na^+ , F^-
Answer» 23. Which of the following have highest electron gain enthalpy O^- , Mg^{2+}, Na^+ , F^-

Discussion

5241.	A plane electromagnetic wave of frequency 50 MHztravels in free space along the x-direction. At aparticular point in space and time,E=6.3 J V /m,At this point B is equal to
Answer» A plane electromagnetic wave of frequency 50 MHztravels in free space along the x-direction. At aparticular point in space and time,E=6.3 J V /m,At this point B is equal to

Discussion

5242.	Select the type of bond present in nitric acid.
Answer» Select the type of bond present in nitric acid.

Discussion

5243.	How to make the cyclic hydrocarbon for 10th standard.
Answer» How to make the cyclic hydrocarbon for 10th standard.

Discussion

5244.	Please help me understand how to identify a polar covalent compound and a non-polar covalent compound.
Answer» Please help me understand how to identify a polar covalent compound and a non-polar covalent compound.

Discussion

5245.	0.9g of Al reacts with dil.HCl to give H2.The volume of H2 evolved at STP is
Answer» 0.9g of Al reacts with dil.HCl to give H2.The volume of H2 evolved at STP is

Discussion

5246.	Carboxylic acids are obtained from alcohols by ____
Answer» Carboxylic acids are obtained from alcohols by ____

Discussion

5247.	Carbon found in nature as mixture of of c12 and c13 the average atomic mass of carbon is 12.011u. what is the percentage abundance of carbon 12 in nature
Answer» Carbon found in nature as mixture of of c12 and c13 the average atomic mass of carbon is 12.011u. what is the percentage abundance of carbon 12 in nature

Discussion

5248.	Balance the following equations : (i) Na + O2 ⟶ Na2O (ii) H2O2 + ⟶ H2O + O2 (iii) Mg(OH)2 +HCl ⟶ MgCl2 + H2O (iv) Fe + O2 ⟶ Fe2O3 (v) Al(OH)3 ⟶ Al2O3 + H2O (vi) NH3 + CuO ⟶ Cu + N2 + H2O (vii) Al2(SO4)3 + NaOH ⟶ Al(OH)3 + Na2SO4 (viii) HNO3 + Ca(OH)2 ⟶ Ca(NO3)2 + H2O (ix) NaOH + H2SO4 ⟶ Na2SO4 + H2O (x) BaCl2 + H2SO4 ⟶ Ba2SO4 + HCl
Answer» Balance the following equations : (i) Na + $O_{2}$ $⟶$ $N a_{2} O$ (ii) $H_{2} O_{2}$ + $⟶$ $H_{2} O + O_{2}$ (iii) $M g (O H)_{2}$ +HCl $⟶$ $M g C l_{2}$ + $H_{2} O$ (iv) Fe + $O_{2}$ $⟶$ $F e_{2} O_{3}$ (v) $A l (O H)_{3}$ $⟶$ $A l_{2} O_{3}$ + $H_{2} O$ (vi) $N H_{3}$ + CuO $⟶$ Cu + $N_{2}$ + $H_{2} O$ (vii) $A l_{2} (S O_{4})_{3}$ + NaOH $⟶$ $A l (O H)_{3}$ + $N a_{2} S O_{4}$ (viii) $H N O_{3}$ + $C a (O H)_{2}$ $⟶$ $C a (N O_{3})_{2}$ + $H_{2} O$ (ix) NaOH + $H_{2} S O_{4}$ $⟶$ $N a_{2} S O_{4}$ + $H_{2} O$ (x) $B a C l_{2}$ + $H_{2} S O_{4}$ $⟶$ $B a_{2} S O_{4}$ + $H C l$

5248.

Balance the following equations : (i) Na + O2 ⟶ Na2O (ii) H2O2 + ⟶ H2O + O2 (iii) Mg(OH)2 +HCl ⟶ MgCl2 + H2O (iv) Fe + O2 ⟶ Fe2O3 (v) Al(OH)3 ⟶ Al2O3 + H2O (vi) NH3 + CuO ⟶ Cu + N2 + H2O (vii) Al2(SO4)3 + NaOH ⟶ Al(OH)3 + Na2SO4 (viii) HNO3 + Ca(OH)2 ⟶ Ca(NO3)2 + H2O (ix) NaOH + H2SO4 ⟶ Na2SO4 + H2O (x) BaCl2 + H2SO4 ⟶ Ba2SO4 + HCl

Answer»

Balance the following equations :

(i) Na + $O_{2}$ $⟶$ $N a_{2} O$

(ii) $H_{2} O_{2}$ + $⟶$ $H_{2} O + O_{2}$

(iii) $M g (O H)_{2}$ +HCl $⟶$ $M g C l_{2}$ + $H_{2} O$

(iv) Fe + $O_{2}$ $⟶$ $F e_{2} O_{3}$

(v) $A l (O H)_{3}$ $⟶$ $A l_{2} O_{3}$ + $H_{2} O$

(vi) $N H_{3}$ + CuO $⟶$ Cu + $N_{2}$ + $H_{2} O$

(vii) $A l_{2} (S O_{4})_{3}$ + NaOH $⟶$ $A l (O H)_{3}$ + $N a_{2} S O_{4}$

(viii) $H N O_{3}$ + $C a (O H)_{2}$ $⟶$ $C a (N O_{3})_{2}$ + $H_{2} O$

(ix) NaOH + $H_{2} S O_{4}$ $⟶$ $N a_{2} S O_{4}$ + $H_{2} O$

(x) $B a C l_{2}$ + $H_{2} S O_{4}$ $⟶$ $B a_{2} S O_{4}$ + $H C l$

Discussion

5249.	Among the following compounds the compound with zero bond order is:
Answer» Among the following compounds the compound with zero bond order is:

Discussion

5250.	21. Mean free path of the gas molecules depends onits pressure as (assume temperature to beconstant)(1) P(2) P-1(3) P-2(4) po
Answer» 21. Mean free path of the gas molecules depends onits pressure as (assume temperature to beconstant)(1) P(2) P-1(3) P-2(4) po

Discussion

Explore topic-wise InterviewSolutions in .

Complete the given thermal cracking reaction: CH3CH2CH3(g)→

What is the difference between n.f ( n factor) and acidity/basicity ?

when to put mg=kx and mgx=1/kx2 in spring mass system why in some places the eq.is mg=kx{k=spring constant}and sometimes it is mgx=1/2kx2

Which of the following element has twice as many electrons in its second shell as it has in its first shell?

A gas cylinder contains 24 x 1024 molecules of nitrogen gas. If Avogadro’s number is 6 x 1023 and the relative atomic mass of nitrogen is 14, calculate:

Define or explain chain isomerism and position isomerism with an example in each case. [4 MARKS]

An aromatic compound " A' on treatment with aqueous ammonia and heating forms compound 'B' which on heating with Br a and KOH forms a compound 'C' { of molecular formula C_6H_7N . Write the structures and IUPAC names of compounds A. B and C.

In a first-order reaction, A→B, if k is rate constant and initial concentration of the reactant A is 0.5 M, then the half-life is:

Briefly explain the working mechanism of soap.

25. he hydrogen bond strength will be highest for:- (1) OH----O (2) FH----O (3) OH----F (4) FH----N

When is a precipitate formed in a reation?

THE ELECTRONIC CONFIGURATION HAVING MAXIMUM DIFFERENCE IN FIRST AND SECOND IONISATION ENERGY IS OPTION A.1S2 2S2 2P6 3S2OPTION B.1S2 2S2 2P6 3S2 3P1OPTION C.1S2 2S2 2P6 3S2 3P2OPTIOND.1S2 2S2 2P6 3S1

Fischer form of the following compound is

Which of the following statement is correct?

For 109% labelled oleum if the number of moles of H2SO4 and free SO3 be x and y then what will be the approx value of (x+y)/(x-y) Thank u

corrosion of metal is generally a serious problem while corrosion of some metal is an advantage why

Choose the correct word from the brackets to complete the sentences.(i) Sulphur can be converted to sulphuric acid using ......... (concentrated/dilute) nitric acid.(ii) Write the equation for the reaction in 2 (i).

2nd seperation energy of an electron in H atom 1.27.2ev 2.1.57ev 3.3.4ev 4.13.6ev

Compare the process of calcination and roasting.

A Zener diode has a contact potential of 1 V in the absence of biasing. It undergoes Zener breakdown for an electric field of 106 V/m at the depletion region. If the width of the depletion region is 2.5 μm, what should be the reverse biased potential for the zener breakdown to occur ?

Which of the following is a correct statement?

What is electrophilic reaction

Explain the product of caustic soda when reacted with aliminiumhyroxide.

Sulphate of a metal contains 40% of metal by mass. Eqivalent wt. of metal will be(1) 16(2) 32(3) 35(4) 64

what will be the mass of 100 atoms of hydrogen?

An element E reacts with water to form a solution which turns phenolphthalein soluiton pink. The element E is most likely ot be: (a) S (b) Ca (c) C (d) Ag

which of the following has least acidic hydrogen?(a)R-NH3^+ (b)R-CO2H (c)R-OH (d)R-SO3H

(a) How would you test for an alcohol? (b) Give the harmful effects of drinking alcohol. (c) Explain why, methanol is much more dangerous to drink than ethanol.

A polymeric metaborate anion has molecular formula of [B3O3(OH)4]−. The number of B−O−B linkage(s) present in one molecule of the mineral is/are:

Which of the following shows maximum osmotic pressure in solution?

Give the methods of the preparation of an oxide of hydrogen used as bleaching agent?

Name the ore of zinc containing its sulphide.

Statement 1: School bells are made up of graphite.Statement 2: Non-metals are not sonorous.

An Arrhenius acid is a substance that gives ions in an aqueous solution.

Which of the following non metal has a shining surface?

Question 41(a) Compound X and aluminium are used to join railway tracks. (a) Identify the compound X

One gram of activates carbon has a surface area of 1000 m2. Considering complete coverage as well as monomolecular adsorption, how much ammonia at STP would be adsorbed on the surface of 447 g carbon if a radius of a ammonia molecules is 10−8 cm.

Caprolactam is used for the manufacture of

23. Which of the following have highest electron gain enthalpy O^- , Mg^{2+}, Na^+ , F^-

A plane electromagnetic wave of frequency 50 MHztravels in free space along the x-direction. At aparticular point in space and time,E=6.3 J V /m,At this point B is equal to

Select the type of bond present in nitric acid.

How to make the cyclic hydrocarbon for 10th standard.

Please help me understand how to identify a polar covalent compound and a non-polar covalent compound.

0.9g of Al reacts with dil.HCl to give H2.The volume of H2 evolved at STP is

Carboxylic acids are obtained from alcohols by ____

Carbon found in nature as mixture of of c12 and c13 the average atomic mass of carbon is 12.011u. what is the percentage abundance of carbon 12 in nature

Among the following compounds the compound with zero bond order is:

21. Mean free path of the gas molecules depends onits pressure as (assume temperature to beconstant)(1) P(2) P-1(3) P-2(4) po