15280 + Interview Questions in Chemistry Page 127 InterviewSolution

6301.	Carbon is a product when conc. sulphuric acid reacts with :
Answer» Carbon is a product when conc. sulphuric acid reacts with :

Discussion

6302.	the pka and pkb value of acetic acid and ammonium hydroxide are 4.78 and 4.7 then pH of ammonium acetate solution
Answer» the pka and pkb value of acetic acid and ammonium hydroxide are 4.78 and 4.7 then pH of ammonium acetate solution

Discussion

6303.	Identify the elements that weren't arranged in the increasing order of atomic mass in the Mendeleev's periodic table.
Answer» Identify the elements that weren't arranged in the increasing order of atomic mass in the Mendeleev's periodic table.

Discussion

6304.	Give the structural formulae and IUPAC name of acetic acid. What is glacial acetic acid?
Answer» Give the structural formulae and IUPAC name of acetic acid. What is glacial acetic acid?

Discussion

6305.	Why is bronze preferred over copper metal for making statues?
Answer» Why is bronze preferred over copper metal for making statues?

Discussion

6306.	What do you mean by the term local earthing? Explain how it is done.
Answer» What do you mean by the term local earthing? Explain how it is done.

6306.

What do you mean by the term local earthing? Explain how it is done.

Answer»

What do you mean by the term local earthing? Explain how it is done.

Discussion

6307.	The combining capacity of an element is known as its ______________.
Answer» The combining capacity of an element is known as its ______________.

Discussion

6308.	Which of the following salts when dissolved in water will get hydrolysed to form an acidic solution?
Answer» Which of the following salts when dissolved in water will get hydrolysed to form an acidic solution?

Discussion

6309.	Which metal has a high melting point?
Answer» Which metal has a high melting point?

Discussion

6310.	Question 6Name the microorganisms which can fix atmospheric nitrogen in the soil.
Answer» Question 6 Name the microorganisms which can fix atmospheric nitrogen in the soil.

Discussion

6311.	Give formula to find no of onto function from A->B ; if n (A) >=n (B)
Answer» Give formula to find no of onto function from A->B ; if n (A) >=n (B)

Discussion

6312.	In pyrophosphoric acid, H4P2O7, number of σ and dπ-pπ bonds are respectively (a) 8 and2(b) 6and2(d) 12 and 2 (c)12 and zero explain in dept
Answer» In pyrophosphoric acid, H4P2O7, number of σ and dπ-pπ bonds are respectively (a) 8 and2(b) 6and2(d) 12 and 2 (c)12 and zero explain in dept

Discussion

6313.	what if there are two similar functional groups in a compound?
Answer» what if there are two similar functional groups in a compound?

Discussion

6314.	A small piece of aluminium metal was placed in a beaker containing a greenish solution. After some time, a grey coating was observed on the aluminium piece. The greenish solution is most likely to be :(1) salt solution of copper metal(2) salt solution of iron metal (3) salt solution of zinc metal(4) salt solution of aluminium metal
Answer» A small piece of aluminium metal was placed in a beaker containing a greenish solution. After some time, a grey coating was observed on the aluminium piece. The greenish solution is most likely to be : (1) salt solution of copper metal (2) salt solution of iron metal (3) salt solution of zinc metal (4) salt solution of aluminium metal

Discussion

6315.	The idea of nascent hydrogen is considered unnecessary. How will u justify the statement
Answer» The idea of nascent hydrogen is considered unnecessary. How will u justify the statement

Discussion

6316.	Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS] H2+Cl2→2HCl 2KClO3→2KCl+3O2 Zn+CuSO4→ZnSO4+Cu 2Pb(NO3)2→2PbO(s)+4NO2+O2 NaOH+HCl→NaCl+H2O
Answer» Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS] $H_{2} + {Cl}_{2} \to 2 HCl$ $2 {KClO}_{3} \to 2 KCl + 3 O_{2}$ $Zn + {CuSO}_{4} \to {ZnSO}_{4} + Cu$ $2 {Pb(NO}_{3})_{2} \to 2 PbO(s) + 4 {NO}_{2} + O_{2}$ $NaOH + HCl \to NaCl + H_{2} O$

6316.

Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS] H2+Cl2→2HCl 2KClO3→2KCl+3O2 Zn+CuSO4→ZnSO4+Cu 2Pb(NO3)2→2PbO(s)+4NO2+O2 NaOH+HCl→NaCl+H2O

Answer»

Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS]

$H_{2} + {Cl}_{2} \to 2 HCl$

$2 {KClO}_{3} \to 2 KCl + 3 O_{2}$

$Zn + {CuSO}_{4} \to {ZnSO}_{4} + Cu$

$2 {Pb(NO}_{3})_{2} \to 2 PbO(s) + 4 {NO}_{2} + O_{2}$

$NaOH + HCl \to NaCl + H_{2} O$

Discussion

6317.	Atomic number of Y=12. Its mass number is 25. How many neutrons are present in the nucleus of Y?
Answer» Atomic number of $Y = 12$ . Its mass number is $25$ . How many neutrons are present in the nucleus of $Y$ ?

Discussion

6318.	Which of the following metal has a low density?
Answer» Which of the following metal has a low density?

Discussion

6319.	A20mg/l solution of a fluorescent dye was discharged into a stream at a constant rate of 10cm3/sec..The background concentration of the dye in the stream water was found to be zero. At concentration of 5 parts per billion. The discharge will be [Use constant rate injection method]
Answer» $A 20 m g / l$ solution of a fluorescent dye was discharged into a stream at a constant rate of $10 c m^{3} / s e c .$ .The background concentration of the dye in the stream water was found to be zero. At concentration of 5 parts per billion. The discharge will be [Use constant rate injection method]

Discussion

6320.	What are the products formed when ammonia is oxidised with copper oxide?
Answer» What are the products formed when ammonia is oxidised with copper oxide?

Discussion

6321.	14 Lithium reacts with carbon directly to form a compound (X) which on hydrolysis produces another compound (Y) ,then X and Y are ??
Answer» 14 Lithium reacts with carbon directly to form a compound (X) which on hydrolysis produces another compound (Y) ,then X and Y are ??

Discussion

6322.	What is the mass of Cl2 obtained on passing 1A current through NaCl solution for 30mins ?
Answer» What is the mass of Cl2 obtained on passing 1A current through NaCl solution for 30mins ?

Discussion

6323.	Which of the following is position and chain isomer of CH3−CH2−C\|\|O−CH2−CH3:
Answer» Which of the following is position and chain isomer of $C H_{3} - C H_{2} - C \| \| O - C H_{2} - C H_{3}$ :

Discussion

6324.	Which of the following salt solution is used as an electrolyte in the electrolytic refining of copper metal?
Answer» Which of the following salt solution is used as an electrolyte in the electrolytic refining of copper metal?

Discussion

6325.	An electrolytic cell is set up using two copper electrodes and an aqueous solution of copper (II) sulphate given below: Name the ion discharged at the cathode.
Answer» An electrolytic cell is set up using two copper electrodes and an aqueous solution of copper (II) sulphate given below: Name the ion discharged at the cathode.

6325.

An electrolytic cell is set up using two copper electrodes and an aqueous solution of copper (II) sulphate given below: Name the ion discharged at the cathode.

Answer»

An electrolytic cell is set up using two copper electrodes and an aqueous solution of copper (II) sulphate given below:

Name the ion discharged at the cathode.

Discussion

6326.	Question 1 (d)Fill in the blank.The process of depositing a layer of any desired metal on another material by means of electricity is called ________.
Answer» Question 1 (d) Fill in the blank. The process of depositing a layer of any desired metal on another material by means of electricity is called ________.

Discussion

6327.	Name an alloy of lead that is used in joining metals for electrical work
Answer» Name an alloy of lead that is used in joining metals for electrical work

Discussion

6328.	A 2.4 L fixed volume container have only N2 and H2at 300 K and 7 atm pressure. At 300 K, N2 and H2completely react a to form NH3 and N2H4. Thepressure of final mixture (Final mixture contain onlyN2H4 and NH3) is 3 atm at 300 K. Reaction are(assumeatm LR 0.08mol K= )Reaction I : N2(g) + 3H2(g) → 2NH3(g)Reaction II : N2(g) + 2H2(g) → N2H4(g)Consider the following statementsI : Mass of NH3 and N2H4 in final mixture are xand y g respectively. Then x is more than yII : Equal mass of N2 react (used) in Both reactionI and reaction IIIII : Initial mixture of H2 and N2 contain 5.6 g N2and 1 g H2.IV : 0.6 g of H2 react according to reaction IV : 50% mol of H2 react according to reaction IIVI : More mass of H2 and N2 react according toreaction I than reaction II
Answer» A 2.4 L fixed volume container have only N2 and H2 at 300 K and 7 atm pressure. At 300 K, N2 and H2 completely react a to form NH3 and N2H4. The pressure of final mixture (Final mixture contain only N2H4 and NH3) is 3 atm at 300 K. Reaction are (assume atm L R 0.08 mol K = ) Reaction I : N2(g) + 3H2(g) → 2NH3(g) Reaction II : N2(g) + 2H2(g) → N2H4(g) Consider the following statements I : Mass of NH3 and N2H4 in final mixture are x and y g respectively. Then x is more than y II : Equal mass of N2 react (used) in Both reaction I and reaction II III : Initial mixture of H2 and N2 contain 5.6 g N2 and 1 g H2. IV : 0.6 g of H2 react according to reaction I V : 50% mol of H2 react according to reaction II VI : More mass of H2 and N2 react according to reaction I than reaction II

Discussion

6329.	Classify the acids according to their basicity and give one example of each type.
Answer» Classify the acids according to their basicity and give one example of each type.

Discussion

6330.

Some methods used for the laboratory preparation of salts are:(a) Metal + acid(b) Carbonate + acid(c) Precipitation (double decomposition)(d) Direct combination(e) TitrationCopy and complete the following table: Salt Method of Preparation Ammonium sulphate Calcium carbonate Iron (III) chloride Lead nitrate Zinc sulphate E

Answer» Some methods used for the laboratory preparation of salts are:

(a) Metal + acid

(b) Carbonate + acid

(c) Precipitation (double decomposition)

(d) Direct combination

(e) Titration

Copy and complete the following table:

Salt	Method of Preparation
Ammonium sulphate Calcium carbonate Iron (III) chloride Lead nitrate Zinc sulphate	E

Discussion

6331.	A coin is tossed two times. Find the probability of getting head in every time.
Answer» A coin is tossed two times. Find the probability of getting head in every time.

Discussion

6332.	If there are 2 electrodes hydrogen and copper which must be taken in the anode half cell?Why?
Answer» If there are 2 electrodes hydrogen and copper which must be taken in the anode half cell?Why?

Discussion

6333.	What is the idiometry?Explain the processes of idiometry in detail. With the related formulas.
Answer» What is the idiometry? Explain the processes of idiometry in detail. With the related formulas.

Discussion

6334.	what are the uses of metals,alloys and non-metals
Answer» what are the uses of metals,alloys and non-metals

Discussion

6335.	Which of the following acid is used with sodium chloride in the laboratory preparation of hydrogen chloride gas?
Answer» Which of the following acid is used with sodium chloride in the laboratory preparation of hydrogen chloride gas?

Discussion

6336.	Is there a difference between gram atom and mole?
Answer» Is there a difference between gram atom and mole?

Discussion

6337.	A purple coloured solution is made alkaline withKOH and is treated with KI forming potassiumiodate. The same solution is acidified with H SOand again it is treated with KI. However this timeinstead of potassium iodate, iodine gas isreleased. The purple coloured solution
Answer» A purple coloured solution is made alkaline withKOH and is treated with KI forming potassiumiodate. The same solution is acidified with H SOand again it is treated with KI. However this timeinstead of potassium iodate, iodine gas isreleased. The purple coloured solution

Discussion

6338.	Though H2O and CO2 are triatomic molecules, why is CO2 a non - polar molecule?
Answer» Though H₂O and CO₂ are triatomic molecules, why is CO₂ a non - polar molecule?

Discussion

6339.	The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups, because
Answer» The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups, because

Discussion

6340.	Calculate the number of neutrons present in the nucleus of an element X which is represented as 3115X.
Answer» Calculate the number of neutrons present in the nucleus of an element X which is represented as $_{15}^{31} X$ .

Discussion

6341.	Which of the following acids is prepared by sulphuric acid industrially?
Answer» Which of the following acids is prepared by sulphuric acid industrially?

Discussion

6342.	The metal which can be extracted simply by heating the cinnabar ore is:
Answer» The metal which can be extracted simply by heating the cinnabar ore is:

Discussion

6343.	The standard entropies of N2,H2 and NH3 arev191.5,130.5,192.6JK^-1mol^-1.the value of del S of formation ammonia is
Answer» The standard entropies of N2,H2 and NH3 arev191.5,130.5,192.6JK^-1mol^-1.the value of del S of formation ammonia is

Discussion

6344.	What are the ph indicators?
Answer» What are the ph indicators?

Discussion

6345.	Which of the following are true according to the postulates of Bohr's theory?
Answer» Which of the following are true according to the postulates of Bohr's theory?

Discussion

6346.	A coil of inductance 2 H having negligible resistance is connected to a source of supply whose voltage is given by V=3t V, where t is time in s. If the voltage is applied when t=0, then the energy stored in the coil after 4 s is _______J.
Answer» A coil of inductance $2 H$ having negligible resistance is connected to a source of supply whose voltage is given by $V = 3 t V$ , where $t$ is time in $s$ . If the voltage is applied when $t = 0$ , then the energy stored in the coil after $4 s$ is _______ $J$ .

Discussion

6347.	1 mol of Ca(OH)2 is completely neutralised by HCl then heat released in the reaction is a) More than 57 kJb) less than 57 kJc) equal to 57 kJd) cannot be determined or compared
Answer» 1 mol of Ca(OH)2 is completely neutralised by HCl then heat released in the reaction is a) More than 57 kJ b) less than 57 kJ c) equal to 57 kJ d) cannot be determined or compared

Discussion

6348.	The correct order of increasing bond angles in the following triatomic species is:- (1)NO2+; NO2;NO2- ( 2) No2-;NO2 ;NO2
Answer» The correct order of increasing bond angles in the following triatomic species is:- (1)NO2+; NO2;NO2- ( 2) No2-;NO2 ;NO2

Discussion

6349.	Calculate the mass of 30.11×10^23 atoms of nitogen
Answer» Calculate the mass of 30.11×10^23 atoms of nitogen

Discussion

6350.	Ordinary air from the atmosphere contains about 21% of oxygen whereas the dissolved air in river water contains about 30%. Give a reason for this.
Answer» Ordinary air from the atmosphere contains about 21% of oxygen whereas the dissolved air in river water contains about 30%. Give a reason for this.

Discussion

Explore topic-wise InterviewSolutions in .

Carbon is a product when conc. sulphuric acid reacts with :

the pka and pkb value of acetic acid and ammonium hydroxide are 4.78 and 4.7 then pH of ammonium acetate solution

Identify the elements that weren't arranged in the increasing order of atomic mass in the Mendeleev's periodic table.

Give the structural formulae and IUPAC name of acetic acid. What is glacial acetic acid?

Why is bronze preferred over copper metal for making statues?

What do you mean by the term local earthing? Explain how it is done.

The combining capacity of an element is known as its ______________.

Which of the following salts when dissolved in water will get hydrolysed to form an acidic solution?

Which metal has a high melting point?

Question 6Name the microorganisms which can fix atmospheric nitrogen in the soil.

Give formula to find no of onto function from A->B ; if n (A) >=n (B)

In pyrophosphoric acid, H4P2O7, number of σ and dπ-pπ bonds are respectively (a) 8 and2(b) 6and2(d) 12 and 2 (c)12 and zero explain in dept

what if there are two similar functional groups in a compound?

The idea of nascent hydrogen is considered unnecessary. How will u justify the statement

Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS] H2+Cl2→2HCl 2KClO3→2KCl+3O2 Zn+CuSO4→ZnSO4+Cu 2Pb(NO3)2→2PbO(s)+4NO2+O2 NaOH+HCl→NaCl+H2O

Atomic number of Y=12. Its mass number is 25. How many neutrons are present in the nucleus of Y?

Which of the following metal has a low density?

A20mg/l solution of a fluorescent dye was discharged into a stream at a constant rate of 10cm3/sec..The background concentration of the dye in the stream water was found to be zero. At concentration of 5 parts per billion. The discharge will be [Use constant rate injection method]

What are the products formed when ammonia is oxidised with copper oxide?

14 Lithium reacts with carbon directly to form a compound (X) which on hydrolysis produces another compound (Y) ,then X and Y are ??

What is the mass of Cl2 obtained on passing 1A current through NaCl solution for 30mins ?

Which of the following is position and chain isomer of CH3−CH2−C||O−CH2−CH3:

Which of the following salt solution is used as an electrolyte in the electrolytic refining of copper metal?

An electrolytic cell is set up using two copper electrodes and an aqueous solution of copper (II) sulphate given below: Name the ion discharged at the cathode.

Question 1 (d)Fill in the blank.The process of depositing a layer of any desired metal on another material by means of electricity is called ________.

Name an alloy of lead that is used in joining metals for electrical work

Classify the acids according to their basicity and give one example of each type.

A coin is tossed two times. Find the probability of getting head in every time.

If there are 2 electrodes hydrogen and copper which must be taken in the anode half cell?Why?

What is the idiometry?Explain the processes of idiometry in detail. With the related formulas.

what are the uses of metals,alloys and non-metals

Which of the following acid is used with sodium chloride in the laboratory preparation of hydrogen chloride gas?

Is there a difference between gram atom and mole?

A purple coloured solution is made alkaline withKOH and is treated with KI forming potassiumiodate. The same solution is acidified with H SOand again it is treated with KI. However this timeinstead of potassium iodate, iodine gas isreleased. The purple coloured solution

Though H2O and CO2 are triatomic molecules, why is CO2 a non - polar molecule?

The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups, because

Calculate the number of neutrons present in the nucleus of an element X which is represented as 3115X.

Which of the following acids is prepared by sulphuric acid industrially?

The metal which can be extracted simply by heating the cinnabar ore is:

The standard entropies of N2,H2 and NH3 arev191.5,130.5,192.6JK^-1mol^-1.the value of del S of formation ammonia is

What are the ph indicators?

Which of the following are true according to the postulates of Bohr's theory?

A coil of inductance 2 H having negligible resistance is connected to a source of supply whose voltage is given by V=3t V, where t is time in s. If the voltage is applied when t=0, then the energy stored in the coil after 4 s is _______J.

1 mol of Ca(OH)2 is completely neutralised by HCl then heat released in the reaction is a) More than 57 kJb) less than 57 kJc) equal to 57 kJd) cannot be determined or compared

The correct order of increasing bond angles in the following triatomic species is:- (1)NO2+; NO2;NO2- ( 2) No2-;NO2 ;NO2

Calculate the mass of 30.11×10^23 atoms of nitogen

Ordinary air from the atmosphere contains about 21% of oxygen whereas the dissolved air in river water contains about 30%. Give a reason for this.