15280 + Interview Questions in Chemistry Page 121 InterviewSolution

6001.	What happens when ferrous sulphide reacts with dil. hydrochloric acid?
Answer» What happens when ferrous sulphide reacts with dil. hydrochloric acid?

Discussion

6002.	An element is determined by the number of:
Answer» An element is determined by the number of:

Discussion

6003.	35. Among the following amphoteric oxide is (1) CO (2) Bi2O3 (3) PbO (4) CO2
Answer» 35. Among the following amphoteric oxide is (1) CO (2) Bi2O3 (3) PbO (4) CO2

Discussion

6004.	ionization energy how to find
Answer» ionization energy how to find

Discussion

6005.	What is a homologous series? Explain with an example.
Answer» What is a homologous series? Explain with an example.

Discussion

6006.	When iron nails are added to an aqueous solution of copper sulphate, a chemical change occurs. Which of the following is not true about this reaction?
Answer» When iron nails are added to an aqueous solution of copper sulphate, a chemical change occurs. Which of the following is not true about this reaction?

Discussion

6007.	Conc. sulphuric acid acts as an oxidising agent when it undergoes :
Answer» Conc. sulphuric acid acts as an oxidising agent when it undergoes :

Discussion

6008.	Give the name and structural formula of an alkyl group.
Answer» Give the name and structural formula of an alkyl group.

Discussion

6009.	hydrogen and oxygen react chemically to form water how much water would be formed if 14.8 grams of hydrogen reacted with 34.8 gm oxygen
Answer» hydrogen and oxygen react chemically to form water how much water would be formed if 14.8 grams of hydrogen reacted with 34.8 gm oxygen

Discussion

6010.	Classify acids on the basis of their concentration and explain them.
Answer» Classify acids on the basis of their concentration and explain them.

Discussion

6011.	Which of the following non-metals is the best conductor of electricity?
Answer» Which of the following non-metals is the best conductor of electricity?

Discussion

6012.	When a non-metal reacts with oxygen, it forms a non-metallic oxide. This non-metallic oxide when reacted with H2O, form a substance, ‘X’ with pH value less than 7. Select the correct option regarding the substance, ‘X’.
Answer» When a non-metal reacts with oxygen, it forms a non-metallic oxide. This non-metallic oxide when reacted with $H_{2} O$ , form a substance, ‘X’ with pH value less than 7. Select the correct option regarding the substance, ‘X’.

Discussion

6013.	Fill in the blanks:(a) The metal plate through which current enters into an electrolyte is called _________. It has _________ of electrons.(b) The metal plate through which _________ leaves from an electrolyte is called _________. It has ________ of electrons.(c) The ions which discharge on the negative electrode during electrolysis _________ electrons. Thus, the ions are said to be _________.(d) The ions which discharge on the positive electrode during electrolysis __________ electrons. Thus, the ions are said to be ________.(e) Hydrogen and metallic ions are _________ because they __________ electrons.(f) Non-metallic ions are __________ because they _________ electrons.
Answer» Fill in the blanks: (a) The metal plate through which current enters into an electrolyte is called _________. It has _________ of electrons. (b) The metal plate through which _________ leaves from an electrolyte is called _________. It has ________ of electrons. (c) The ions which discharge on the negative electrode during electrolysis _________ electrons. Thus, the ions are said to be _________. (d) The ions which discharge on the positive electrode during electrolysis __________ electrons. Thus, the ions are said to be ________. (e) Hydrogen and metallic ions are _________ because they __________ electrons. (f) Non-metallic ions are __________ because they _________ electrons.

Discussion

6014.	Find the ratio of molar accounts of H2SO4 needed to preciptise metal ions from 20ml each of 1M cd(NO3)2 and 0.5 M cuso4??
Answer» Find the ratio of molar accounts of H2SO4 needed to preciptise metal ions from 20ml each of 1M cd(NO3)2 and 0.5 M cuso4??

Discussion

6015.	why do not the metal ions repel each other in a metallic bond? though the magnitude of negetive charge is less than that of the positive once?
Answer» why do not the metal ions repel each other in a metallic bond? though the magnitude of negetive charge is less than that of the positive once?

Discussion

6016.	In metallurgy of iron, when limestone is added to the blast furnace, the calcium ends up in:
Answer» In metallurgy of iron, when limestone is added to the blast furnace, the calcium ends up in:

Discussion

6017.	The volume occupied by 10g of Oxygen at 0o C and 2 atm pressure will be approximately
Answer» The volume occupied by 10g of Oxygen at $0^{o} C$ and 2 atm pressure will be approximately

Discussion

6018.	State what do you observe when ammonium hydroxide to Iron (III) sulphate solution.
Answer» State what do you observe when ammonium hydroxide to Iron (III) sulphate solution.

Discussion

6019.	The ph of a solution obtained by mixing 100ml of 0.2 M acetic acid with 100 ml of 0.2M sodium hydroxide will be (pka for cH3cooH=4.74)
Answer» The ph of a solution obtained by mixing 100ml of 0.2 M acetic acid with 100 ml of 0.2M sodium hydroxide will be (pka for cH3cooH=4.74)

Discussion

6020.	caffiene has a molicular mass of 194.if it contains 28.9% bymass of nitrogen,number of atoms of nitrogenin one molecule of caffine is
Answer» caffiene has a molicular mass of 194.if it contains 28.9% bymass of nitrogen,number of atoms of nitrogenin one molecule of caffine is

Discussion

6021.	Question 52Name one metal and one non-metal that exist in liquid state at room temperature. Also, name two metals having melting point less than 310 K(37∘C)
Answer» Question 52 Name one metal and one non-metal that exist in liquid state at room temperature. Also, name two metals having melting point less than $310 K (37^{\circ} C)$

Discussion

6022.	How to decide maximum electron density on any aromatic compound?
Answer» How to decide maximum electron density on any aromatic compound?

Discussion

6023.	What is the chemical formula of oxalic acid and citric acid?
Answer» What is the chemical formula of oxalic acid and citric acid?

Discussion

6024.	A first order reaction takes 40 min for 30% decomposition calculate half life
Answer» A first order reaction takes 40 min for 30% decomposition calculate half life

Discussion

6025.	The major component in coolant in refrigerators and shaving foams is
Answer» The major component in coolant in refrigerators and shaving foams is

Discussion

6026.	The components of the ecosystem are:
Answer» The components of the ecosystem are:

Discussion

6027.	The maximum number of isomers possible for n-pentane is.3
Answer» The maximum number of isomers possible for n-pentane is. 3

Discussion

6028.	8. What is reducing agent?
Answer» 8. What is reducing agent?

Discussion

6029.	A student takes about 4 mL of distilled water in four test tubes marked P, Q, R and S. He then dissolves in each test tube an equal amount of one salt in one test tube, in namely sodium sulphate in P, potassium sulphate in Q, calcium sulphate in R and magnesium sulphate in S. After that he adds an equal amount of soap solution in each test tube. On shaking each of these test tubes well, he observes a good amount of lather (foam) in the test tubes marked (a) P and Q (b) Q and R (c) P, Q and S (d) P, R and S
Answer» A student takes about 4 mL of distilled water in four test tubes marked P, Q, R and S. He then dissolves in each test tube an equal amount of one salt in one test tube, in namely sodium sulphate in P, potassium sulphate in Q, calcium sulphate in R and magnesium sulphate in S. After that he adds an equal amount of soap solution in each test tube. On shaking each of these test tubes well, he observes a good amount of lather (foam) in the test tubes marked (a) P and Q (b) Q and R (c) P, Q and S (d) P, R and S

Discussion

6030.	A dehydration reaction is a reaction in which there is
Answer» A dehydration reaction is a reaction in which there is

Discussion

6031.	From the list given below, select the word(s) required to correctly complete the blanks (i) to (v) in the following passage:Ammonia, Ammonium, Carbonate, Carbon dioxide, Hydrogen, Hydronium, Hydroxide, Precipitate, Salt, Water.A solution 'X' turns blue litmus red so it must contain (i) ________ ions; another solution 'Y' turns red litmus blue and therefore must contain (ii) _________ ions. When X and Y are mixed together, the products will be a (iii) ________ and (iv) _________. If a piece of magnesium was put into solution X, (v) ________ gas would be evolved.
Answer» From the list given below, select the word(s) required to correctly complete the blanks (i) to (v) in the following passage: Ammonia, Ammonium, Carbonate, Carbon dioxide, Hydrogen, Hydronium, Hydroxide, Precipitate, Salt, Water. A solution 'X' turns blue litmus red so it must contain (i) ________ ions; another solution 'Y' turns red litmus blue and therefore must contain (ii) _________ ions. When X and Y are mixed together, the products will be a (iii) ________ and (iv) _________. If a piece of magnesium was put into solution X, (v) ________ gas would be evolved.

Discussion

6032.	Rajat bought a bicycle for his son but his son did not take good care of the bicycle and left it outside the shade throughout the rainy season. After few months, he found a brown flaky substance formed on the surface of the bicycle. The chemical formula of brown flaky substance is
Answer» Rajat bought a bicycle for his son but his son did not take good care of the bicycle and left it outside the shade throughout the rainy season. After few months, he found a brown flaky substance formed on the surface of the bicycle. The chemical formula of brown flaky substance is

Discussion

6033.	What is the value of cos60°cos80°cos100°cos120°
Answer» What is the value of cos60°cos80°cos100°cos120°

Discussion

6034.	To show that rainwater does not contain dissolved impurities but well water contains them.
Answer» To show that rainwater does not contain dissolved impurities but well water contains them.

Discussion

6035.	Those substance which can burn are called combustible substance.all kind of substance are burn by friction . The substances which are very high ignition temperature like Stones and meteoroids . Why we says it non combustible Substance.
Answer» Those substance which can burn are called combustible substance.all kind of substance are burn by friction . The substances which are very high ignition temperature like Stones and meteoroids . Why we says it non combustible Substance.

Discussion

6036.	Explain :(a) octet rule for formation of sodium chloride(b) duplet rule for formation of hydrogen.
Answer» Explain : (a) octet rule for formation of sodium chloride (b) duplet rule for formation of hydrogen.

6036.

Explain :(a) octet rule for formation of sodium chloride(b) duplet rule for formation of hydrogen.

Answer»

Explain :

(a) octet rule for formation of sodium chloride

(b) duplet rule for formation of hydrogen.

Discussion

6037.	Metal M1 is more reactive than metal M2. Which metal will be higher up in the reactivity series?
Answer» Metal M1 is more reactive than metal M2. Which metal will be higher up in the reactivity series?

Discussion

6038.	malonic acid is heated to form a product which is treated with NaOH form sodium salt. this salt is electrolyse in aqueous medium to form product A.if malonic acid is directly treated with NaOH and electrolysed in aqueous medium it form B. the difference in molar mass of A andB is
Answer» malonic acid is heated to form a product which is treated with NaOH form sodium salt. this salt is electrolyse in aqueous medium to form product A.if malonic acid is directly treated with NaOH and electrolysed in aqueous medium it form B. the difference in molar mass of A andB is

Discussion

6039.	Why does CsCl have more ionic character than CsF?
Answer» Why does CsCl have more ionic character than CsF?

Discussion

6040.	15 An alkene 'A' contains three c-c, eight C-H sigma bonds and one C-C Pi bond. 'A' On ozonolysis gives two moles of aldehyde of molar mass 44u. Write IUPAC name of 'A'
Answer» 15 An alkene 'A' contains three c-c, eight C-H sigma bonds and one C-C Pi bond. 'A' On ozonolysis gives two moles of aldehyde of molar mass 44u. Write IUPAC name of 'A'

Discussion

6041.	The electronic configuration of three elements X, Y and Z are given below: X: 2 Y: 2, 6 Z: 2, 8, 2 i. Which element belongs to the second period? ii. Which element belongs to the second group?
Answer» The electronic configuration of three elements X, Y and Z are given below: X: 2 Y: 2, 6 Z: 2, 8, 2 i. Which element belongs to the second period? ii. Which element belongs to the second group?

6041.

The electronic configuration of three elements X, Y and Z are given below: X: 2 Y: 2, 6 Z: 2, 8, 2 i. Which element belongs to the second period? ii. Which element belongs to the second group?

Answer»

The electronic configuration of three elements X, Y and Z are given below:

X: 2

Y: 2, 6

Z: 2, 8, 2

i. Which element belongs to the second period?

ii. Which element belongs to the second group?

Discussion

6042.	Question 25 Which of the following does not belong to the same homologous series? (a) CH4 (b) C2H6 (c) C3H8 (d) C4H8
Answer» Question 25 Which of the following does not belong to the same homologous series? (a) ${CH}_{4}$ (b) $C_{2} H_{6}$ (c) $C_{3} H_{8}$ (d) $C_{4} H_{8}$

Discussion

6043.	38.The absolute enthalpy of neutralization of the reaction from MgO(s)::: MgO+2HCl=MgCl2+H2O Will be:: 1)57.33 2)-57.33 3)>57.33 4)
Answer» 38.The absolute enthalpy of neutralization of the reaction from MgO(s)::: MgO+2HCl=MgCl2+H2O Will be:: 1)57.33 2)-57.33 3)>57.33 4)<57.33 (All in kJ/mol)

Discussion

6044.	Is atomic mass and molecular equal to the molar mass
Answer» Is atomic mass and molecular equal to the molar mass

Discussion

6045.	Copy and complete the following equations. (a) AIN+H2O→ (b) 2NH3+3PbO→ (c) NH3+3CI2→ (d) NH3+CO2→ (i) Which property of ammonia is illustrated by equation (c) ? (ii) What important fertiliser is prepared from equation (d) ? State the conditions.
Answer» Copy and complete the following equations. (a) $A I N + H_{2} O \to$ (b) $2 N H_{3} + 3 P b O \to$ (c) $N H_{3} + 3 C I_{2} \to$ (d) $N H_{3} + C O_{2} \to$ (i) Which property of ammonia is illustrated by equation (c) ? (ii) What important fertiliser is prepared from equation (d) ? State the conditions.

6045.

Copy and complete the following equations. (a) AIN+H2O→ (b) 2NH3+3PbO→ (c) NH3+3CI2→ (d) NH3+CO2→ (i) Which property of ammonia is illustrated by equation (c) ? (ii) What important fertiliser is prepared from equation (d) ? State the conditions.

Answer»

Copy and complete the following equations.

(a) $A I N + H_{2} O \to$ (b) $2 N H_{3} + 3 P b O \to$

(c) $N H_{3} + 3 C I_{2} \to$ (d) $N H_{3} + C O_{2} \to$

(i) Which property of ammonia is illustrated by equation (c) ?

(ii) What important fertiliser is prepared from equation (d) ? State the conditions.

Discussion

6046.	Which of the following is incorrect with respect to metals?
Answer» Which of the following is incorrect with respect to metals?

Discussion

6047.	The standard oxidation potential of Ni\|Ni2+ electrode = 0.236 V. If this is combined with a hydrogen electrode in acid solution, at what pH of the solution will the measured emf be zero at 25 ºC. Assume [Ni2+] = 1M.
Answer» The standard oxidation potential of $N i \| N i^{2 +}$ electrode = 0.236 V. If this is combined with a hydrogen electrode in acid solution, at what pH of the solution will the measured emf be zero at 25 ºC. Assume $[N i^{2 +}]$ = 1M.

Discussion

6048.	43 If the tempreture is increased from 27^°-37^° for a reaction, the rate constant of that reaction is increased by two times. Calculate the activation energy of the above reaction.
Answer» 43 If the tempreture is increased from 27^°-37^° for a reaction, the rate constant of that reaction is increased by two times. Calculate the activation energy of the above reaction.

Discussion

6049.	What is antioxidants? More details about oxidation and reduction with interesting examples? Why corrosion happen layer by layer
Answer» What is antioxidants? More details about oxidation and reduction with interesting examples? Why corrosion happen layer by layer

6049.

What is antioxidants? More details about oxidation and reduction with interesting examples? Why corrosion happen layer by layer

Answer»

What is antioxidants?

More details about oxidation and reduction with interesting examples?

Why corrosion happen layer by layer

Discussion

6050.	Which among the following are positional isomers?
Answer» Which among the following are positional isomers?

6050.

Which among the following are positional isomers?

Answer»

Which among the following are positional isomers?

Discussion

Explore topic-wise InterviewSolutions in .

What happens when ferrous sulphide reacts with dil. hydrochloric acid?

An element is determined by the number of:

35. Among the following amphoteric oxide is (1) CO (2) Bi2O3 (3) PbO (4) CO2

ionization energy how to find

What is a homologous series? Explain with an example.

When iron nails are added to an aqueous solution of copper sulphate, a chemical change occurs. Which of the following is not true about this reaction?

Conc. sulphuric acid acts as an oxidising agent when it undergoes :

Give the name and structural formula of an alkyl group.

hydrogen and oxygen react chemically to form water how much water would be formed if 14.8 grams of hydrogen reacted with 34.8 gm oxygen

Classify acids on the basis of their concentration and explain them.

Which of the following non-metals is the best conductor of electricity?

When a non-metal reacts with oxygen, it forms a non-metallic oxide. This non-metallic oxide when reacted with H2O, form a substance, ‘X’ with pH value less than 7. Select the correct option regarding the substance, ‘X’.

Find the ratio of molar accounts of H2SO4 needed to preciptise metal ions from 20ml each of 1M cd(NO3)2 and 0.5 M cuso4??

why do not the metal ions repel each other in a metallic bond? though the magnitude of negetive charge is less than that of the positive once?

In metallurgy of iron, when limestone is added to the blast furnace, the calcium ends up in:

The volume occupied by 10g of Oxygen at 0o C and 2 atm pressure will be approximately

State what do you observe when ammonium hydroxide to Iron (III) sulphate solution.

The ph of a solution obtained by mixing 100ml of 0.2 M acetic acid with 100 ml of 0.2M sodium hydroxide will be (pka for cH3cooH=4.74)

caffiene has a molicular mass of 194.if it contains 28.9% bymass of nitrogen,number of atoms of nitrogenin one molecule of caffine is

Question 52Name one metal and one non-metal that exist in liquid state at room temperature. Also, name two metals having melting point less than 310 K(37∘C)

How to decide maximum electron density on any aromatic compound?

What is the chemical formula of oxalic acid and citric acid?

A first order reaction takes 40 min for 30% decomposition calculate half life

The major component in coolant in refrigerators and shaving foams is

The components of the ecosystem are:

The maximum number of isomers possible for n-pentane is.3

8. What is reducing agent?

A dehydration reaction is a reaction in which there is

Rajat bought a bicycle for his son but his son did not take good care of the bicycle and left it outside the shade throughout the rainy season. After few months, he found a brown flaky substance formed on the surface of the bicycle. The chemical formula of brown flaky substance is

What is the value of cos60°cos80°cos100°cos120°

To show that rainwater does not contain dissolved impurities but well water contains them.

Those substance which can burn are called combustible substance.all kind of substance are burn by friction . The substances which are very high ignition temperature like Stones and meteoroids . Why we says it non combustible Substance.

Explain :(a) octet rule for formation of sodium chloride(b) duplet rule for formation of hydrogen.

Metal M1 is more reactive than metal M2. Which metal will be higher up in the reactivity series?

malonic acid is heated to form a product which is treated with NaOH form sodium salt. this salt is electrolyse in aqueous medium to form product A.if malonic acid is directly treated with NaOH and electrolysed in aqueous medium it form B. the difference in molar mass of A andB is

Why does CsCl have more ionic character than CsF?

15 An alkene 'A' contains three c-c, eight C-H sigma bonds and one C-C Pi bond. 'A' On ozonolysis gives two moles of aldehyde of molar mass 44u. Write IUPAC name of 'A'

The electronic configuration of three elements X, Y and Z are given below: X: 2 Y: 2, 6 Z: 2, 8, 2 i. Which element belongs to the second period? ii. Which element belongs to the second group?

Question 25 Which of the following does not belong to the same homologous series? (a) CH4 (b) C2H6 (c) C3H8 (d) C4H8

38.The absolute enthalpy of neutralization of the reaction from MgO(s)::: MgO+2HCl=MgCl2+H2O Will be:: 1)57.33 2)-57.33 3)>57.33 4)

Is atomic mass and molecular equal to the molar mass

Copy and complete the following equations. (a) AIN+H2O→ (b) 2NH3+3PbO→ (c) NH3+3CI2→ (d) NH3+CO2→ (i) Which property of ammonia is illustrated by equation (c) ? (ii) What important fertiliser is prepared from equation (d) ? State the conditions.

Which of the following is incorrect with respect to metals?

The standard oxidation potential of Ni|Ni2+ electrode = 0.236 V. If this is combined with a hydrogen electrode in acid solution, at what pH of the solution will the measured emf be zero at 25 ºC. Assume [Ni2+] = 1M.

43 If the tempreture is increased from 27^°-37^° for a reaction, the rate constant of that reaction is increased by two times. Calculate the activation energy of the above reaction.

What is antioxidants? More details about oxidation and reduction with interesting examples? Why corrosion happen layer by layer

Which among the following are positional isomers?