15280 + Interview Questions in Chemistry Page 125 InterviewSolution

6201.	what is the theory behind the precipitaion reaction between aqueous solution of barium chloride and aqueous solution of sodium sulphate?
Answer» what is the theory behind the precipitaion reaction between aqueous solution of barium chloride and aqueous solution of sodium sulphate?

Discussion

6202.	What volume of oxygen would be required for complete combustion of 100 litres of ethane according to the following equation?2C2H6 + 7O2 → 4CO2 + 6H2O
Answer» What volume of oxygen would be required for complete combustion of 100 litres of ethane according to the following equation? 2C₂H₆ + 7O₂ $\overset{}{\to}$ 4CO₂ + 6H₂O

Discussion

6203.	Which of the following has largest size in aqueous solution? Options: (a) Li^+ (b) Na^+ (c) K^+ (d) Cs^+ Correct:Li^+
Answer» Which of the following has largest size in aqueous solution? Options: (a) Li^+ (b) Na^+ (c) K^+ (d) Cs^+ Correct:Li^+

Discussion

6204.	Two organic compounds A and B have the same molecular formula C6H12. Write the names and structural formulae: (a) If A is a cyclic compound (b) If B is an open chain compound (c) Which compound contains single bonds as well as a double bond? (d) Which compound contains only single bonds?
Answer» Two organic compounds A and B have the same molecular formula $C_{6} H_{12}$ . Write the names and structural formulae: (a) If A is a cyclic compound (b) If B is an open chain compound (c) Which compound contains single bonds as well as a double bond? (d) Which compound contains only single bonds?

Discussion

6205.

Match List-I with List-II : List-I List-II (a) Mercury(i) Vapour phase refining (b) Copper(ii) Distillation refining (c) Silicon (iii) Electrolytic refining(d) Nickel(iv) Zone refiningChoose the most appropriate answer from the option given below .

Answer»

Match List-I with List-II :

List-I	List-II
(a) Mercury	(i) Vapour phase refining
(b) Copper	(ii) Distillation refining
(c) Silicon	(iii) Electrolytic refining
(d) Nickel	(iv) Zone refining

Choose the most appropriate answer from the option given below .

Discussion

6206.	What volume of CO2 will contain same number of molecules as are present in 16 gram of oxygen
Answer» What volume of CO2 will contain same number of molecules as are present in 16 gram of oxygen

Discussion

6207.	When does the nucleus of an atom become radioactive?
Answer» When does the nucleus of an atom become radioactive?

Discussion

6208.	Which property of ammonia is illustrated by the reaction (3-ii) in the above question?
Answer» Which property of ammonia is illustrated by the reaction (3-ii) in the above question?

Discussion

6209.	Which of the following metals can be refined by pyro refining process?
Answer» Which of the following metals can be refined by pyro refining process?

Discussion

6210.	Why does calcium flot on water ?
Answer» Why does calcium flot on water ?

Discussion

6211.	The rate of a reaction becomes four times when the temperature changes from 293K to 313 K. Calculate the energy of activation (Ea) of the reaction assuming that it does not change with temperature. [R=8.314 JK−1mol−1,log 4=0.6021]
Answer» The rate of a reaction becomes four times when the temperature changes from 293K to 313 K. Calculate the energy of activation $(E_{a})$ of the reaction assuming that it does not change with temperature. $[R = 8.314 J K^{- 1} m o l^{- 1}, l o g 4 = 0.6021]$

Discussion

6212.	When crystals of copper sulphate are strongly heated the residue obtain is a) red in colour b) colourless c)green in colour d)blue in colour
Answer» When crystals of copper sulphate are strongly heated the residue obtain is a) red in colour b) colourless c)green in colour d)blue in colour

Discussion

6213.	Which of the following compounds are oxidized by HIO4?
Answer» Which of the following compounds are oxidized by $H I O_{4} ?$

Discussion

6214.	For S2O3-2 , when normal covalent bonded structure is considered, sulphur atoms have ox. State of +4 and 0 resp. This implies average of +2. If the coordinately bonded structure is considered , average oxm state is +4 . Which one is more preferred if both +2 and +4 appear in options ?
Answer» For S2O3-2 , when normal covalent bonded structure is considered, sulphur atoms have ox. State of +4 and 0 resp. This implies average of +2. If the coordinately bonded structure is considered , average oxm state is +4 . Which one is more preferred if both +2 and +4 appear in options ?

Discussion

6215.	Sponge is easily compressible. Is it a solid?
Answer» Sponge is easily compressible. Is it a solid?

Discussion

6216.	what are the conditions for pure oscillation? is it possible in space?
Answer» what are the conditions for pure oscillation? is it possible in space?

Discussion

6217.	Non-metals generally form ________.
Answer» Non-metals generally form ________.

Discussion

6218.	The common name of halo alkane is:
Answer» The common name of halo alkane is:

Discussion

6219.	4 mole of a mixture of Mohr's salt and fe2(so4)3 requires 500 ml of 1 M K2cr2o7 for complete oxidation in acidic media um.mole% of Mohr's salt in mixture is: a-25 b-50 c-60 d-75
Answer» 4 mole of a mixture of Mohr's salt and fe2(so4)3 requires 500 ml of 1 M K2cr2o7 for complete oxidation in acidic media um.mole% of Mohr's salt in mixture is: a-25 b-50 c-60 d-75

Discussion

6220.	A mixture of dihydrogen and dioxygen at one bar pressure contains 20% by weight of dihydrogen. Calculate the partial pressure of dihydrogen:
Answer» A mixture of dihydrogen and dioxygen at one bar pressure contains 20% by weight of dihydrogen. Calculate the partial pressure of dihydrogen:

Discussion

6221.	From which of the following are coal and petroleum obtained?
Answer» From which of the following are coal and petroleum obtained?

Discussion

6222.	Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?(i) Good thermal conductivity(ii) Good electrical conductivity(iii) Ductility(iv) High melting point(a) (i) and (ii) (b) (i) and (iii)(c) (ii) and (iii) (d) (i) and (iv)
Answer» Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same? (i) Good thermal conductivity (ii) Good electrical conductivity (iii) Ductility (iv) High melting point (a) (i) and (ii) (b) (i) and (iii) (c) (ii) and (iii) (d) (i) and (iv)

6222.

Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?(i) Good thermal conductivity(ii) Good electrical conductivity(iii) Ductility(iv) High melting point(a) (i) and (ii) (b) (i) and (iii)(c) (ii) and (iii) (d) (i) and (iv)

Answer»

Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?

(i) Good thermal conductivity

(ii) Good electrical conductivity

(iii) Ductility

(iv) High melting point

(a) (i) and (ii) (b) (i) and (iii)

(c) (ii) and (iii) (d) (i) and (iv)

Discussion

6223.	Why calcium is not stable according spdf because its shells are completely filled 1s 1s 2p 2s 3p 3s 2. 2. 6 2. 6. .2
Answer» Why calcium is not stable according spdf because its shells are completely filled 1s 1s 2p 2s 3p 3s 2. 2. 6 2. 6. .2

Discussion

6224.	Which of the following atoms will have the smallest size?
Answer» Which of the following atoms will have the smallest size?

Discussion

6225.	why are gallium and indium being metals inert to oxygen and water ?
Answer» why are gallium and indium being metals inert to oxygen and water ?

Discussion

6226.	An element is a metal or not is finally determined by whether it is hard and shiny or not. Do you agree? Give reasons.
Answer» An element is a metal or not is finally determined by whether it is hard and shiny or not. Do you agree? Give reasons.

Discussion

6227.	An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:
Answer» An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:

Discussion

6228.	An element having electronic configuration 2, 8, 18, 3 belongs to which group of the Modern Periodic Table?
Answer» An element having electronic configuration 2, 8, 18, 3 belongs to which group of the Modern Periodic Table?

Discussion

6229.	How many minimum carbons required for chain isomerism and positional isomerism in alkanes,alkenes and alkynes?
Answer» How many minimum carbons required for chain isomerism and positional isomerism in alkanes,alkenes and alkynes?

Discussion

6230.	Explain the fact that why organic compounds are large in number.
Answer» Explain the fact that why organic compounds are large in number.

Discussion

6231.	Calculate the mass percentage of carbon in urea (NH2CONH2).
Answer» Calculate the mass percentage of carbon in urea $({NH}_{2} {CONH}_{2})$ .

Discussion

6232.	Chlorine generally forms:
Answer» Chlorine generally forms:

Discussion

6233.	Divide the following redox reactions into oxidation and reduction half reactions. (i) Zn+Pb2→Zn2+Pb (ii) Zn+Cu2+→Zn2+Cu (iii) Cl2+2Br−→Br2+2Cl−
Answer» Divide the following redox reactions into oxidation and reduction half reactions. (i) $Z n + P b^{2} \to Z n^{2} + P b$ (ii) $Z n + C u^{2 +} \to Z n^{2} + C u$ (iii) $C l_{2} + 2 B r^{-} \to B r_{2} + 2 C l^{-}$

6233.

Divide the following redox reactions into oxidation and reduction half reactions. (i) Zn+Pb2→Zn2+Pb (ii) Zn+Cu2+→Zn2+Cu (iii) Cl2+2Br−→Br2+2Cl−

Answer»

Divide the following redox reactions into oxidation and reduction half reactions.

(i) $Z n + P b^{2} \to Z n^{2} + P b$

(ii) $Z n + C u^{2 +} \to Z n^{2} + C u$

(iii) $C l_{2} + 2 B r^{-} \to B r_{2} + 2 C l^{-}$

Discussion

6234.	Which of the following metal comes below copper in reactivity series ?
Answer» Which of the following metal comes below copper in reactivity series ?

Discussion

6235.	Complete the folowing reaction: FeCl3+3NH4OH→
Answer» Complete the folowing reaction: FeCl3+3NH4OH→

Discussion

6236.	Two people standing on the same side of the tower in a straight line with it, measure the angles of elevation of the top of the tower as 25o and 50o respectively. If the height of the tower is 70 m, find the distance between the two people.
Answer» Two people standing on the same side of the tower in a straight line with it, measure the angles of elevation of the top of the tower as 25^o and 50^o respectively. If the height of the tower is 70 m, find the distance between the two people.

Discussion

6237.	What is difference between pure vapour pressure and partial pressure
Answer» What is difference between pure vapour pressure and partial pressure

Discussion

6238.	112cm3 of a gaseous fluoride of phosphorus has a mass of 0.63 g. Calculate the relative molecular mass of the fluoride. If the molecule of the fluoride contains only one atom of phosphorus, then determine the formula of the phosphorus fluoride. [F = 19; P = 31].
Answer» $112 c m^{3}$ of a gaseous fluoride of phosphorus has a mass of 0.63 g. Calculate the relative molecular mass of the fluoride. If the molecule of the fluoride contains only one atom of phosphorus, then determine the formula of the phosphorus fluoride. [F = 19; P = 31].

Discussion

6239.	88. For the gas-phase decomposition, 3O2(g) ----(equilibrium sign) 2O3(g) (1)del H0 (3)del H>0, del S
Answer» 88. For the gas-phase decomposition, 3O2(g) ----<>(equilibrium sign) 2O3(g) (1)del H<0, del S<0 (2)del H>0, del S>0 (3)del H>0, del S<0 (4)del H<0, del S>0

Discussion

6240.	Four charges of same magnitude q are placed at the four corners of a square of side a.The value of electric potential at the center of the square will be
Answer» Four charges of same magnitude q are placed at the four corners of a square of side a.The value of electric potential at the center of the square will be

Discussion

6241.	Which theory is correct Arrhenius or Bronsted Lowry theory?
Answer» Which theory is correct Arrhenius or Bronsted Lowry theory?

Discussion

6242.	9. How many atoms do mercury vapour molecules consist of if the density of mercury vapour relative to air is 6.92? The average molar mass of air is 29g/mole.
Answer» 9. How many atoms do mercury vapour molecules consist of if the density of mercury vapour relative to air is 6.92? The average molar mass of air is 29g/mole.

Discussion

6243.	The name "hydrogen chloride" was given by
Answer» The name "hydrogen chloride" was given by

Discussion

6244.	What is limiting reagent ? With some easiest example
Answer» What is limiting reagent ? With some easiest example

Discussion

6245.	in a electrolytic tank aluminium metal is being extracted by d electrolysis of molten aluminium oxide using carbon electrodes.Ot is observed that one of the carbon electrodes is gradually burnt away and has to be replaced i)Which carbon electrode is burnt away and Why? Briefly explain
Answer» in a electrolytic tank aluminium metal is being extracted by d electrolysis of molten aluminium oxide using carbon electrodes.Ot is observed that one of the carbon electrodes is gradually burnt away and has to be replaced i)Which carbon electrode is burnt away and Why? Briefly explain

Discussion

6246.	Fluoride of phosphorus in gaseous state was found to diffuse 2.12 times more slowly than nitrogen under similar conditions then calculate the molecular mass and molecular formula of this fluoride which contains one atom of phosphorus per molecule.
Answer» Fluoride of phosphorus in gaseous state was found to diffuse 2.12 times more slowly than nitrogen under similar conditions then calculate the molecular mass and molecular formula of this fluoride which contains one atom of phosphorus per molecule.

Discussion

6247.	12. In the reaction 4A+2B+3C--->A4B2C3,the number of moles of product formed will be_______,if starting from 2moles of A,1.2moles of B and 1.44 moles of C
Answer» 12. In the reaction 4A+2B+3C--->A4B2C3,the number of moles of product formed will be_______,if starting from 2moles of A,1.2moles of B and 1.44 moles of C

Discussion

6248.	23. A certain negative ion X-2 has in its nucleus 18 neurons and 18 electrons in its extra nuclear structure. What is the mass number of the most abundant isotope of X.
Answer» 23. A certain negative ion X-2 has in its nucleus 18 neurons and 18 electrons in its extra nuclear structure. What is the mass number of the most abundant isotope of X.

Discussion

6249.	Identify the products of the following reactions.
Answer» Identify the products of the following reactions.

Discussion

6250.	calculate the pressure in atm, exerted by 10^{23} gas particles(each of mass 10^{-22}gm) in a container of volume 1 litre. The rms speed is 10^5 cm/s. What is the total kinetic energy of these particles and what must be the temperature?
Answer» calculate the pressure in atm, exerted by 10^{23} gas particles(each of mass 10^{-22}gm) in a container of volume 1 litre. The rms speed is 10^5 cm/s. What is the total kinetic energy of these particles and what must be the temperature?

Discussion

Explore topic-wise InterviewSolutions in .

what is the theory behind the precipitaion reaction between aqueous solution of barium chloride and aqueous solution of sodium sulphate?

What volume of oxygen would be required for complete combustion of 100 litres of ethane according to the following equation?2C2H6 + 7O2 → 4CO2 + 6H2O

Which of the following has largest size in aqueous solution? Options: (a) Li^+ (b) Na^+ (c) K^+ (d) Cs^+ Correct:Li^+

Two organic compounds A and B have the same molecular formula C6H12. Write the names and structural formulae: (a) If A is a cyclic compound (b) If B is an open chain compound (c) Which compound contains single bonds as well as a double bond? (d) Which compound contains only single bonds?

Match List-I with List-II : List-I List-II (a) Mercury(i) Vapour phase refining (b) Copper(ii) Distillation refining (c) Silicon (iii) Electrolytic refining(d) Nickel(iv) Zone refiningChoose the most appropriate answer from the option given below .

What volume of CO2 will contain same number of molecules as are present in 16 gram of oxygen

When does the nucleus of an atom become radioactive?

Which property of ammonia is illustrated by the reaction (3-ii) in the above question?

Which of the following metals can be refined by pyro refining process?

Why does calcium flot on water ?

The rate of a reaction becomes four times when the temperature changes from 293K to 313 K. Calculate the energy of activation (Ea) of the reaction assuming that it does not change with temperature. [R=8.314 JK−1mol−1,log 4=0.6021]

When crystals of copper sulphate are strongly heated the residue obtain is a) red in colour b) colourless c)green in colour d)blue in colour

Which of the following compounds are oxidized by HIO4?

For S2O3-2 , when normal covalent bonded structure is considered, sulphur atoms have ox. State of +4 and 0 resp. This implies average of +2. If the coordinately bonded structure is considered , average oxm state is +4 . Which one is more preferred if both +2 and +4 appear in options ?

Sponge is easily compressible. Is it a solid?

what are the conditions for pure oscillation? is it possible in space?

Non-metals generally form ________.

The common name of halo alkane is:

4 mole of a mixture of Mohr's salt and fe2(so4)3 requires 500 ml of 1 M K2cr2o7 for complete oxidation in acidic media um.mole% of Mohr's salt in mixture is: a-25 b-50 c-60 d-75

A mixture of dihydrogen and dioxygen at one bar pressure contains 20% by weight of dihydrogen. Calculate the partial pressure of dihydrogen:

From which of the following are coal and petroleum obtained?

Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?(i) Good thermal conductivity(ii) Good electrical conductivity(iii) Ductility(iv) High melting point(a) (i) and (ii) (b) (i) and (iii)(c) (ii) and (iii) (d) (i) and (iv)

Why calcium is not stable according spdf because its shells are completely filled 1s 1s 2p 2s 3p 3s 2. 2. 6 2. 6. .2

Which of the following atoms will have the smallest size?

why are gallium and indium being metals inert to oxygen and water ?

An element is a metal or not is finally determined by whether it is hard and shiny or not. Do you agree? Give reasons.

An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:

An element having electronic configuration 2, 8, 18, 3 belongs to which group of the Modern Periodic Table?

How many minimum carbons required for chain isomerism and positional isomerism in alkanes,alkenes and alkynes?

Explain the fact that why organic compounds are large in number.

Calculate the mass percentage of carbon in urea (NH2CONH2).

Chlorine generally forms:

Divide the following redox reactions into oxidation and reduction half reactions. (i) Zn+Pb2→Zn2+Pb (ii) Zn+Cu2+→Zn2+Cu (iii) Cl2+2Br−→Br2+2Cl−

Which of the following metal comes below copper in reactivity series ?

Complete the folowing reaction: FeCl3+3NH4OH→

Two people standing on the same side of the tower in a straight line with it, measure the angles of elevation of the top of the tower as 25o and 50o respectively. If the height of the tower is 70 m, find the distance between the two people.

What is difference between pure vapour pressure and partial pressure

112cm3 of a gaseous fluoride of phosphorus has a mass of 0.63 g. Calculate the relative molecular mass of the fluoride. If the molecule of the fluoride contains only one atom of phosphorus, then determine the formula of the phosphorus fluoride. [F = 19; P = 31].

88. For the gas-phase decomposition, 3O2(g) ----(equilibrium sign) 2O3(g) (1)del H0 (3)del H>0, del S

Four charges of same magnitude q are placed at the four corners of a square of side a.The value of electric potential at the center of the square will be

Which theory is correct Arrhenius or Bronsted Lowry theory?

9. How many atoms do mercury vapour molecules consist of if the density of mercury vapour relative to air is 6.92? The average molar mass of air is 29g/mole.

The name "hydrogen chloride" was given by

What is limiting reagent ? With some easiest example

in a electrolytic tank aluminium metal is being extracted by d electrolysis of molten aluminium oxide using carbon electrodes.Ot is observed that one of the carbon electrodes is gradually burnt away and has to be replaced i)Which carbon electrode is burnt away and Why? Briefly explain

Fluoride of phosphorus in gaseous state was found to diffuse 2.12 times more slowly than nitrogen under similar conditions then calculate the molecular mass and molecular formula of this fluoride which contains one atom of phosphorus per molecule.

12. In the reaction 4A+2B+3C--->A4B2C3,the number of moles of product formed will be_______,if starting from 2moles of A,1.2moles of B and 1.44 moles of C

23. A certain negative ion X-2 has in its nucleus 18 neurons and 18 electrons in its extra nuclear structure. What is the mass number of the most abundant isotope of X.

Identify the products of the following reactions.

calculate the pressure in atm, exerted by 10^{23} gas particles(each of mass 10^{-22}gm) in a container of volume 1 litre. The rms speed is 10^5 cm/s. What is the total kinetic energy of these particles and what must be the temperature?