15280 + Interview Questions in Chemistry Page 21 InterviewSolution

1001.	Which of the following are amphoteric oxides?
Answer» Which of the following are amphoteric oxides?

Discussion

1002.	The position of elements A,B,C,D and E in the periodic table are shown below: Group 1Group 2Group 17Group 18−−−D−BC−A−−E (a) State which are metals, non-metals and noble gas in this table. (b) State which is the most reactive (i) metal (ii) non-metal (c) Which type of ion will be formed by element A,B,and C. (d) Which is larger in size (i) D or E (ii) B or C.
Answer» The position of elements A,B,C,D and E in the periodic table are shown below: $\begin{matrix} G r o u p 1 & G r o u p 2 & G r o u p 17 & G r o u p 18 - & - & - & D - & B & C & - A & - & - & E \end{matrix}$ (a) State which are metals, non-metals and noble gas in this table. (b) State which is the most reactive (i) metal (ii) non-metal (c) Which type of ion will be formed by element A,B,and C. (d) Which is larger in size (i) D or E (ii) B or C.

1002.

The position of elements A,B,C,D and E in the periodic table are shown below: Group 1Group 2Group 17Group 18−−−D−BC−A−−E (a) State which are metals, non-metals and noble gas in this table. (b) State which is the most reactive (i) metal (ii) non-metal (c) Which type of ion will be formed by element A,B,and C. (d) Which is larger in size (i) D or E (ii) B or C.

Answer»

The position of elements A,B,C,D and E in the periodic table are shown below:

$\begin{matrix} G r o u p 1 & G r o u p 2 & G r o u p 17 & G r o u p 18 - & - & - & D - & B & C & - A & - & - & E \end{matrix}$

(a) State which are metals, non-metals and noble gas in this table.

(b) State which is the most reactive (i) metal (ii) non-metal

(c) Which type of ion will be formed by element A,B,and C.

(d) Which is larger in size (i) D or E (ii) B or C.

Discussion

1003.	Write two methods of preventing rusting of iron.
Answer» Write two methods of preventing rusting of iron.

Discussion

1004.	The IUPAC name of the compound H3C−CH\|C2H5−CH\|C2H5−CH3
Answer» The IUPAC name of the compound $H_{3} C - C H \| C_{2} H_{5} - C H \| C_{2} H_{5} - C H_{3}$

1004.

The IUPAC name of the compound H3C−CH|C2H5−CH|C2H5−CH3

Answer»

The IUPAC name of the compound

$H_{3} C - C H | C_{2} H_{5} - C H | C_{2} H_{5} - C H_{3}$

Discussion

1005.	the molarity of orthophosphoric acid having a purity of 70% by mass and specific gravity of 1.54 would be a)11M b) 22M c) 33M d) 44M
Answer» the molarity of orthophosphoric acid having a purity of 70% by mass and specific gravity of 1.54 would be a)11M b) 22M c) 33M d) 44M

1005.

the molarity of orthophosphoric acid having a purity of 70% by mass and specific gravity of 1.54 would be a)11M b) 22M c) 33M d) 44M

Answer»

the molarity of orthophosphoric acid having a purity of 70% by mass and specific gravity of 1.54 would be

a)11M

b) 22M

c) 33M

d) 44M

Discussion

1006.	Gold does not react easily with acid but it reacts with aqua regia. What is aqua regia ? Why does it react with gold?
Answer» Gold does not react easily with acid but it reacts with aqua regia. What is aqua regia ? Why does it react with gold?

Discussion

1007.	Changes in _____ have resulted in much of our waste becoming non-biodegradable.
Answer» Changes in _____ have resulted in much of our waste becoming non-biodegradable.

Discussion

1008.	68 Total no.of isomers in tricholorinated propane(C3H5Cl3)including stereo isomers of it
Answer» 68 Total no.of isomers in tricholorinated propane(C3H5Cl3)including stereo isomers of it

Discussion

1009.	Name or state the following with reference to the elements of the first three periods of the periodic table. (a) Noble gas with duplet arrangement of electrons. (b) Metalloid in Period 3. (c) Valency of elements in Group 14 and Group 15. (d) Noble gas having electronic configuration: 2, 8, 8.
Answer» Name or state the following with reference to the elements of the first three periods of the periodic table. (a) Noble gas with duplet arrangement of electrons. (b) Metalloid in Period 3. (c) Valency of elements in Group 14 and Group 15. (d) Noble gas having electronic configuration: 2, 8, 8.

1009.

Name or state the following with reference to the elements of the first three periods of the periodic table. (a) Noble gas with duplet arrangement of electrons. (b) Metalloid in Period 3. (c) Valency of elements in Group 14 and Group 15. (d) Noble gas having electronic configuration: 2, 8, 8.

Answer»

Name or state the following with reference to the elements of the first three periods of the periodic table.
(a) Noble gas with duplet arrangement of electrons.

(b) Metalloid in Period 3.

(c) Valency of elements in Group 14 and Group 15.

(d) Noble gas having electronic configuration: 2, 8, 8.

Discussion

1010.	Galvanization is applying a coating of:
Answer» Galvanization is applying a coating of:

Discussion

1011.	Hydrogen is a non-metal but it is placed in reactivity series of metal. Why?
Answer» Hydrogen is a non-metal but it is placed in reactivity series of metal. Why?

Discussion

1012.	The structures of an acid and an alcohol are shown in the given figures. Which of these pairs of compounds correctly identifies the given two compounds?
Answer» The structures of an acid and an alcohol are shown in the given figures. Which of these pairs of compounds correctly identifies the given two compounds?

Discussion

1013.	84.If y= log tanx then find dy /dx
Answer» 84.If y= log tanx then find dy /dx

Discussion

1014.	7.4.4g of a colourless oxide of an element has volume 2240ml at STP. The gas is (1) CO2 (2)C3H8 (3)N2O (4) All of these
Answer» 7.4.4g of a colourless oxide of an element has volume 2240ml at STP. The gas is (1) CO2 (2)C3H8 (3)N2O (4) All of these

Discussion

1015.	Is the impurity in cyanide process in metallurgy water soluble or insoluble
Answer» Is the impurity in cyanide process in metallurgy water soluble or insoluble

Discussion

1016.	Which compound is normally used as a drying agent for ammonia?
Answer» Which compound is normally used as a drying agent for ammonia?

Discussion

1017.	Select the option which is a property of sulphuric acid?
Answer» Select the option which is a property of sulphuric acid?

Discussion

1018.	What type of compounds are usually formed between metals and non- metals?
Answer» What type of compounds are usually formed between metals and non- metals?

Discussion

1019.	The main product of the following reaction is C6H5CH2CH(OH)CH(CH3.2Conc.H2SO4→ ?
Answer» The main product of the following reaction is C6H5CH2CH(OH)CH(CH3.2 Conc.H2SO4 → ?

Discussion

1020.	Is anything below femto
Answer» Is anything below femto

Discussion

1021.	Which metal does not react with oxygen?
Answer» Which metal does not react with oxygen?

Discussion

1022.	Which of the following are not isomers ?
Answer» Which of the following are not isomers ?

Discussion

1023.	0.45 g of an organic compound gave 0.44g of CO2 and 0.09g of H2O. The molecular mass of the compound is 90amu. Calculate the molecular formula.
Answer» 0.45 g of an organic compound gave 0.44g of CO2 and 0.09g of H2O. The molecular mass of the compound is 90amu. Calculate the molecular formula.

Discussion

1024.	why CH≡ C^- has more stability than CH_2=CH-CH_2^-
Answer» why CH≡ C^- has more stability than CH_2=CH-CH_2^-

Discussion

1025.	Which of the following is the incorrect representation of the formation of molecules in lewis dot structures?
Answer» Which of the following is the incorrect representation of the formation of molecules in lewis dot structures?

Discussion

1026.	Give two tests for the identification of hydrogen chloride.
Answer» Give two tests for the identification of hydrogen chloride.

Discussion

1027.	What is the name of functional group -COOH?
Answer» What is the name of functional group -COOH?

Discussion

1028.	Difference between the number of protons in the largest element of 4th period and the smallest element of third period is
Answer» Difference between the number of protons in the largest element of 4th period and the smallest element of third period is

Discussion

1029.	Send the PDF for the empirical formula
Answer» Send the PDF for the empirical formula

Discussion

1030.	What type of rock is coal?
Answer» What type of rock is coal?

Discussion

1031.	Which one of the following is most electrophilic in nature ?(A)CH3+(B) O=N+(C) NO2+(D)CH3•
Answer» Which one of the following is most electrophilic in nature ? (A)CH3+ (B) O=N+ (C) NO2+ (D)CH3•

Discussion

1032.	What is the reaction of nitrogen dioxide with water?
Answer» What is the reaction of nitrogen dioxide with water?

Discussion

1033.	What happens when carbon dioxide gas is passed through sodium hydroxide solution ?
Answer» What happens when carbon dioxide gas is passed through sodium hydroxide solution ?

Discussion

1034.	ntAmong the following molecules or ions,which has the longest C-N bond?n nt1-H2CNCH3n nt2-H3CCNn nt3-(H3C)4N+n nt4-(H2C)2N+n
Answer» ntAmong the following molecules or ions,which has the longest C-N bond?n nt1-H2CNCH3n nt2-H3CCNn nt3-(H3C)4N+n nt4-(H2C)2N+n

Discussion

1035.	For the reaction A+B→C+D ΔH=−20 kJ mol−1 . The activation energy of the forward reaction is 85kJ mol–1. The activation energy for backward reaction is
Answer» For the reaction $A + B \to C + D Δ H = - 20 k J m o l^{- 1}$ . The activation energy of the forward reaction is $85 k J m o l^{- 1}$ . The activation energy for backward reaction is

Discussion

1036.	We say that cooking is also a chemical reaction.so when we cook something we provide heat.and when food is ready it produces heat. Which type of reaction is this Exothermic or endothermic????
Answer» We say that cooking is also a chemical reaction.so when we cook something we provide heat.and when food is ready it produces heat. Which type of reaction is this Exothermic or endothermic????

1036.

We say that cooking is also a chemical reaction.so when we cook something we provide heat.and when food is ready it produces heat. Which type of reaction is this Exothermic or endothermic????

Answer»

We say that cooking is also a chemical reaction.so when we cook something we provide heat.and when food is ready it produces heat.

Which type of reaction is this

Exothermic or endothermic????

Discussion

1037.	If 0.5 mol of BaCl2 is mixed with 0.2 mol of Na3PO4, the maximum number of moles of Ba3(PO4)2 that can be formed is:
Answer» If 0.5 mol of $B a C l_{2}$ is mixed with 0.2 mol of $N a_{3} P O_{4}$ , the maximum number of moles of $B a_{3} (P O_{4})_{2}$ that can be formed is:

Discussion

1038.	Question 65Two ores A and B were taken. On heating, ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals ?
Answer» Question 65 Two ores A and B were taken. On heating, ore A gives ${CO}_{2}$ whereas, ore B gives ${SO}_{2}$ . What steps will you take to convert them into metals ?

Discussion

1039.	The value of ----- is less for D2O compared to that of H2O2A)Boiling pointB)Latent Heat of Vapourization (J. g^-1)C) Density(g/mL) at 20 CelsiusD) Dielectric constant at 20 Celsius
Answer» The value of ----- is less for D2O compared to that of H2O2 A)Boiling point B)Latent Heat of Vapourization (J. g^-1) C) Density(g/mL) at 20 Celsius D) Dielectric constant at 20 Celsius

Discussion

1040.	13.What is the order of atomic size of d block element from scandium to zinc?
Answer» 13.What is the order of atomic size of d block element from scandium to zinc?

Discussion

1041.	From the formula listed below, choose one, in each case, corresponding to the salt having the given description:- AgCl,CuCO3,CuSO4.5H2O,KNO3,NaCl,NaHSO4,Pb(NO3)2.ZnCO3,ZnCO4.7H2O. (a) an acid salt. (b) an insoluble chloride. (c) on treating with concentrated sulphuric acid, this salt changes from blue to white. (d) on heating, this salt changes from green to black. (e) this salt given nitrogen dioxide on heating.
Answer» From the formula listed below, choose one, in each case, corresponding to the salt having the given description:- $A g C l, C u C O_{3}, C u S O_{4} .5 H_{2} O, K N O_{3}, N a C l, N a H S O_{4}, P b (N O_{3})_{2} . Z n C O_{3}, Z n C O_{4} .7 H_{2} O .$ (a) an acid salt. (b) an insoluble chloride. (c) on treating with concentrated sulphuric acid, this salt changes from blue to white. (d) on heating, this salt changes from green to black. (e) this salt given nitrogen dioxide on heating.

1041.

From the formula listed below, choose one, in each case, corresponding to the salt having the given description:- AgCl,CuCO3,CuSO4.5H2O,KNO3,NaCl,NaHSO4,Pb(NO3)2.ZnCO3,ZnCO4.7H2O. (a) an acid salt. (b) an insoluble chloride. (c) on treating with concentrated sulphuric acid, this salt changes from blue to white. (d) on heating, this salt changes from green to black. (e) this salt given nitrogen dioxide on heating.

Answer»

From the formula listed below, choose one, in each case, corresponding to the salt having the given description:-

$A g C l, C u C O_{3}, C u S O_{4} .5 H_{2} O, K N O_{3}, N a C l, N a H S O_{4}, P b (N O_{3})_{2} . Z n C O_{3}, Z n C O_{4} .7 H_{2} O .$

(a) an acid salt.

(b) an insoluble chloride.

(c) on treating with concentrated sulphuric acid, this salt changes from blue to white.

(d) on heating, this salt changes from green to black.

(e) this salt given nitrogen dioxide on heating.

Discussion

1042.	(a) Name two physical properties each of sodium and carbon in which their behaviour is not as expected from their classification as metal and non- metal respectively. (b) Name two metals whose melting points are so low that they melt when held in the hand.
Answer» (a) Name two physical properties each of sodium and carbon in which their behaviour is not as expected from their classification as metal and non- metal respectively. (b) Name two metals whose melting points are so low that they melt when held in the hand.

Discussion

1043.	44. For the reaction N2+3H2 gives 2NH3 under certain conditions of temperature and partial pressure of the reactants the rate if of formation of NH3 is 1.0 ×10 raise to power -4 kg per hour . The rate of conversion ofH2 under the same conditions is
Answer» 44. For the reaction N2+3H2 gives 2NH3 under certain conditions of temperature and partial pressure of the reactants the rate if of formation of NH3 is 1.0 ×10 raise to power -4 kg per hour . The rate of conversion ofH2 under the same conditions is

Discussion

1044.	0.5 M HCl solution has ions Hg+2 Cd+2 Sr+2 Fe+2 Cu+2 . To pass the H2S gas in this solution which are precipitated.
Answer» 0.5 M HCl solution has ions Hg+2 Cd+2 Sr+2 Fe+2 Cu+2 . To pass the H2S gas in this solution which are precipitated.

Discussion

1045.	if K4FeCN6 ionised to 10% then total no. of particles per mole of K4FeCN6 i
Answer» if K4FeCN6 ionised to 10% then total no. of particles per mole of K4FeCN6 i

Discussion

1046.	3. Find out the oxidation state of tin in its salt when 11gram of tin is deposited when a current of 1A is passed for 5 hours through molten salt
Answer» 3. Find out the oxidation state of tin in its salt when 11gram of tin is deposited when a current of 1A is passed for 5 hours through molten salt

Discussion

1047.	46. Why the reaction of p-nitro bromobenzene with sodium ethoxide not possible by carbanion formation?
Answer» 46. Why the reaction of p-nitro bromobenzene with sodium ethoxide not possible by carbanion formation?

Discussion

1048.	Which of the below gives chile salt peter,when it reacts with Conc.HNO3?
Answer» Which of the below gives chile salt peter,when it reacts with Conc. $H N O_{3}$ ?

Discussion

1049.	isotope
Answer» isotope

Discussion

1050.	9.At 25^° C, the K_{sp} value of AgCl is 1.8 × 10^{-10}. If 10^{-5} moles of Ag^+ are added to solution then K_{sp} will be : (a) 1.8 × 10^{-15} (b) 1.8 × 10^{-10} (c) 1.8 × 10^{-5} (d) 18 × 10^{+10
Answer» 9.At 25^° C, the K_{sp} value of AgCl is 1.8 × 10^{-10}. If 10^{-5} moles of Ag^+ are added to solution then K_{sp} will be : (a) 1.8 × 10^{-15} (b) 1.8 × 10^{-10} (c) 1.8 × 10^{-5} (d) 18 × 10^{+10

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following are amphoteric oxides?

Write two methods of preventing rusting of iron.

The IUPAC name of the compound H3C−CH|C2H5−CH|C2H5−CH3

the molarity of orthophosphoric acid having a purity of 70% by mass and specific gravity of 1.54 would be a)11M b) 22M c) 33M d) 44M

Gold does not react easily with acid but it reacts with aqua regia. What is aqua regia ? Why does it react with gold?

Changes in _____ have resulted in much of our waste becoming non-biodegradable.

68 Total no.of isomers in tricholorinated propane(C3H5Cl3)including stereo isomers of it

Name or state the following with reference to the elements of the first three periods of the periodic table. (a) Noble gas with duplet arrangement of electrons. (b) Metalloid in Period 3. (c) Valency of elements in Group 14 and Group 15. (d) Noble gas having electronic configuration: 2, 8, 8.

Galvanization is applying a coating of:

Hydrogen is a non-metal but it is placed in reactivity series of metal. Why?

The structures of an acid and an alcohol are shown in the given figures. Which of these pairs of compounds correctly identifies the given two compounds?

84.If y= log tanx then find dy /dx

7.4.4g of a colourless oxide of an element has volume 2240ml at STP. The gas is (1) CO2 (2)C3H8 (3)N2O (4) All of these

Is the impurity in cyanide process in metallurgy water soluble or insoluble

Which compound is normally used as a drying agent for ammonia?

Select the option which is a property of sulphuric acid?

What type of compounds are usually formed between metals and non- metals?

The main product of the following reaction is C6H5CH2CH(OH)CH(CH3.2Conc.H2SO4→ ?

Is anything below femto

Which metal does not react with oxygen?

Which of the following are not isomers ?

0.45 g of an organic compound gave 0.44g of CO2 and 0.09g of H2O. The molecular mass of the compound is 90amu. Calculate the molecular formula.

why CH≡ C^- has more stability than CH_2=CH-CH_2^-

Which of the following is the incorrect representation of the formation of molecules in lewis dot structures?

Give two tests for the identification of hydrogen chloride.

What is the name of functional group -COOH?

Difference between the number of protons in the largest element of 4th period and the smallest element of third period is

Send the PDF for the empirical formula

What type of rock is coal?

Which one of the following is most electrophilic in nature ?(A)CH3+(B) O=N+(C) NO2+(D)CH3•

What is the reaction of nitrogen dioxide with water?

What happens when carbon dioxide gas is passed through sodium hydroxide solution ?

ntAmong the following molecules or ions,which has the longest C-N bond?n nt1-H2CNCH3n nt2-H3CCNn nt3-(H3C)4N+n nt4-(H2C)2N+n

For the reaction A+B→C+D ΔH=−20 kJ mol−1 . The activation energy of the forward reaction is 85kJ mol–1. The activation energy for backward reaction is

We say that cooking is also a chemical reaction.so when we cook something we provide heat.and when food is ready it produces heat. Which type of reaction is this Exothermic or endothermic????

If 0.5 mol of BaCl2 is mixed with 0.2 mol of Na3PO4, the maximum number of moles of Ba3(PO4)2 that can be formed is:

Question 65Two ores A and B were taken. On heating, ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals ?

The value of ----- is less for D2O compared to that of H2O2A)Boiling pointB)Latent Heat of Vapourization (J. g^-1)C) Density(g/mL) at 20 CelsiusD) Dielectric constant at 20 Celsius

13.What is the order of atomic size of d block element from scandium to zinc?

(a) Name two physical properties each of sodium and carbon in which their behaviour is not as expected from their classification as metal and non- metal respectively. (b) Name two metals whose melting points are so low that they melt when held in the hand.

44. For the reaction N2+3H2 gives 2NH3 under certain conditions of temperature and partial pressure of the reactants the rate if of formation of NH3 is 1.0 ×10 raise to power -4 kg per hour . The rate of conversion ofH2 under the same conditions is

0.5 M HCl solution has ions Hg+2 Cd+2 Sr+2 Fe+2 Cu+2 . To pass the H2S gas in this solution which are precipitated.

if K4FeCN6 ionised to 10% then total no. of particles per mole of K4FeCN6 i

3. Find out the oxidation state of tin in its salt when 11gram of tin is deposited when a current of 1A is passed for 5 hours through molten salt

46. Why the reaction of p-nitro bromobenzene with sodium ethoxide not possible by carbanion formation?

Which of the below gives chile salt peter,when it reacts with Conc.HNO3?

isotope

9.At 25^° C, the K_{sp} value of AgCl is 1.8 × 10^{-10}. If 10^{-5} moles of Ag^+ are added to solution then K_{sp} will be : (a) 1.8 × 10^{-15} (b) 1.8 × 10^{-10} (c) 1.8 × 10^{-5} (d) 18 × 10^{+10