15280 + Interview Questions in Chemistry Page 94 InterviewSolution

4651.	How many maximum no. of electrons can be accommodated in the d-subshell?10
Answer» How many maximum no. of electrons can be accommodated in the d-subshell? 10

Discussion

4652.	34 g of ammonia is decomposed to _________ g of nitrogen and _____ g of hydrogen, _____ is the ratio of hydrogen to nitrogen by mass. The options in blanks are respectively:
Answer» 34 g of ammonia is decomposed to _________ g of nitrogen and _____ g of hydrogen, _____ is the ratio of hydrogen to nitrogen by mass. The options in blanks are respectively:

Discussion

4653.	Baking soda is used in small amount in making bread and cake. It helps to make these soft and spongy. An aqueous solution of baking soda turns red litmus blue. It is also used in soda acid fire extinguisher.Use this information to answer the following questions:(a) How does baking soda help to make cakes and bread soft and spongy?(b) How does it help in extinguishing fire?(c) Is the pH value of baking soda solution lesser than or greater than 7?
Answer» Baking soda is used in small amount in making bread and cake. It helps to make these soft and spongy. An aqueous solution of baking soda turns red litmus blue. It is also used in soda acid fire extinguisher. Use this information to answer the following questions: (a) How does baking soda help to make cakes and bread soft and spongy? (b) How does it help in extinguishing fire? (c) Is the pH value of baking soda solution lesser than or greater than 7?

Discussion

4654.	Polonium is named after ________.
Answer» Polonium is named after ________.

Discussion

4655.	Which of the following is/are correct about SO2?
Answer» Which of the following is/are correct about $S O_{2}$ ?

Discussion

4656.	Which two gases each change the colour of damp red litmus paper?
Answer» Which two gases each change the colour of damp red litmus paper?

Discussion

4657.	Find the total percentage of oxygen in magnesium nitrate crystal Mg(NO3)2·6H2O.[H = 1, N = 14, O = 16, Mg = 24]
Answer» Find the total percentage of oxygen in magnesium nitrate crystal Mg(NO₃)₂·6H₂O. [H = 1, N = 14, O = 16, Mg = 24]

Discussion

4658.	Which of the following compound liberates CO2 when treated with NaHCO3- (1) CH3COCH2NH2 (2) CH3NH2 (3) (CH3)4N^+OH^- (4) CH3N^+H3Cl^-
Answer» Which of the following compound liberates CO2 when treated with NaHCO3- (1) CH3COCH2NH2 (2) CH3NH2 (3) (CH3)4N^+OH^- (4) CH3N^+H3Cl^-

Discussion

4659.	31 : If nh3 is a strong field ligand then in Cr(NH3)+3 there are 3unpaired electrons instead of 1 unpaired electrons.Why?
Answer» 31 : If nh3 is a strong field ligand then in Cr(NH3)+3 there are 3unpaired electrons instead of 1 unpaired electrons.Why?

Discussion

4660.	100 g C6H12O6(aq.) is dissolved in water. The solution has vapour pressure is equal to 40 torr at a certain temperature. Vapour pressure of H2O (l) is 40.18 torr at same temperature. If this solution is cooled to−0.93 ∘C, what mass of ice will be separated out? (Kf=1.86kgmol−1)(Give your answer upto two decimal point)
Answer» $100 g$ $C_{6} H_{12} O_{6} (a q .)$ is dissolved in water. The solution has vapour pressure is equal to $40 torr$ at a certain temperature. Vapour pressure of $H_{2} O$ (l) is $40.18 torr$ at same temperature. If this solution is cooled to $- 0.93^{\circ} C,$ what mass of ice will be separated out? $(K_{f} = 1.86 k g m o l^{- 1})$ (Give your answer upto two decimal point)

Discussion

4661.	Why does air when passes through small holes produces sounds??
Answer» Why does air when passes through small holes produces sounds??

Discussion

4662.	What is the reason that although having 5 electrons in outermost shell, nitrogen generally shows only valency 3 but phosphorus shows both valencies 3 and 5.
Answer» What is the reason that although having 5 electrons in outermost shell, nitrogen generally shows only valency 3 but phosphorus shows both valencies 3 and 5.

Discussion

4663.	The sun delivers 103 Wm−2 of electromagnetic flux to the earth’s surface. The total power that is incident on a roof of dimensions 8 m×20 m will be-
Answer» The sun delivers $10^{3} {Wm}^{- 2}$ of electromagnetic flux to the earth’s surface. The total power that is incident on a roof of dimensions $8 m \times 20 m$ will be-

Discussion

4664.	Energy required for the ionisation of 0.02g atom of magnesium is xkJ. the amount of energy required to ionise 1 atom of magnesium will be
Answer» Energy required for the ionisation of 0.02g atom of magnesium is xkJ. the amount of energy required to ionise 1 atom of magnesium will be

Discussion

4665.	Derive the expression for pH of hydrolysis of Ammonium carbonate (Nh4)2CO3.
Answer» Derive the expression for pH of hydrolysis of Ammonium carbonate (Nh4)2CO3.

Discussion

4666.	In Metallurgy, which of the following terms are popular methods of concentration?
Answer» In Metallurgy, which of the following terms are popular methods of concentration?

Discussion

4667.	Answer the following questions.a.Explain the difference between acid and alkali.b.Why indicator does not get affected by salt?c.Which substances are produced by neutralization process?d.Which are the industrial uses of adids ?
Answer» Answer the following questions. a.Explain the difference between acid and alkali. b.Why indicator does not get affected by salt? c.Which substances are produced by neutralization process? d.Which are the industrial uses of adids ?

Discussion

4668.	Which of the following property is shown by acids?
Answer» Which of the following property is shown by acids?

Discussion

4669.	A technique called mass spectrometry is used to segregate different isotopes of an element. In such a setup, hydrogen gas is sent which is ionized by the ion source and we get nuclei of protium (11H), deuterium (21H) and tritium (31H). A perpendicular magnetic field is used to deviate these in separate beams. Pick the correct option.
Answer» A technique called mass spectrometry is used to segregate different isotopes of an element. In such a setup, hydrogen gas is sent which is ionized by the ion source and we get nuclei of protium $(_{1}^{1} H)$ , deuterium $(_{1}^{2} H)$ and tritium $(_{1}^{3} H)$ . A perpendicular magnetic field is used to deviate these in separate beams. Pick the correct option.

4669.

A technique called mass spectrometry is used to segregate different isotopes of an element. In such a setup, hydrogen gas is sent which is ionized by the ion source and we get nuclei of protium (11H), deuterium (21H) and tritium (31H). A perpendicular magnetic field is used to deviate these in separate beams. Pick the correct option.

Answer»

A technique called mass spectrometry is used to segregate different isotopes of an element. In such a setup, hydrogen gas is sent which is ionized by the ion source and we get nuclei of protium $(_{1}^{1} H)$ , deuterium $(_{1}^{2} H)$ and tritium $(_{1}^{3} H)$ .

A perpendicular magnetic field is used to deviate these in separate beams. Pick the correct option.

Discussion

4670.	1.nitrogen reacts with hydrogen to give ammonia.Calculate the volume of the ammonia gas formed when nitrogen reacts with 6 liters of hydrogen.All gases measures at s.t.p ,using Gay lussacs law ,with step by step process
Answer» 1.nitrogen reacts with hydrogen to give ammonia.Calculate the volume of the ammonia gas formed when nitrogen reacts with 6 liters of hydrogen.All gases measures at s.t.p ,using Gay lussacs law ,with step by step process

Discussion

4671.	Name three common forms in which metals occur in nature.How do metals interact with dilute acids?
Answer» Name three common forms in which metals occur in nature.How do metals interact with dilute acids?

Discussion

4672.	What is C in the constant k in the formula of electric formula?
Answer» What is C in the constant k in the formula of electric formula?

Discussion

4673.	Question 5Which of the following oxide(s) of iron would be obtained on a prolonged reaction of iron with steam?(a) FeO(b) Fe2O3(c) Fe3O4(d) Fe2O3 and Fe3O4
Answer» Question 5 Which of the following oxide(s) of iron would be obtained on a prolonged reaction of iron with steam? (a) $FeO$ (b) ${Fe}_{2} O_{3}$ (c) ${Fe}_{3} O_{4}$ (d) ${Fe}_{2} O_{3}$ and ${Fe}_{3} O_{4}$

Discussion

4674.	Ifan electron has spin quantum number of + 1/2 and a magnetic quantum number of -1, it cannot berepresented in an
Answer» If an electron has spin quantum number of + 1/2 and a magnetic quantum number of -1, it cannot be represented in an

Discussion

4675.	What change would you observe on adding: 1) Blue litmus solution to an aqueous solution of washing soda 2) Red litmus solution to an aqueous solution of washing soda
Answer» What change would you observe on adding: 1) Blue litmus solution to an aqueous solution of washing soda 2) Red litmus solution to an aqueous solution of washing soda

Discussion

4676.	The oxygen family is also known as:
Answer» The oxygen family is also known as:

Discussion

4677.	Is CaCO3 a base or a salt?
Answer» Is CaCO₃ a base or a salt?

Discussion

4678.	Arrange the following in an increasing order of strengths of oxidizing powers of the following:
Answer» Arrange the following in an increasing order of strengths of oxidizing powers of the following:

Discussion

4679.	How to determine R and S configuration of (+)-4-methylcyclohexene?
Answer» How to determine R and S configuration of (+)-4-methylcyclohexene?

Discussion

4680.	Aqueous solution of nickel sulphate contains Ni2+ and SO42− ions.(a) Which ion moves towards the cathode?(b) What is the product at the anode?
Answer» Aqueous solution of nickel sulphate contains Ni²⁺ and SO₄²⁻ ions. (a) Which ion moves towards the cathode? (b) What is the product at the anode?

Discussion

4681.	Sheila offered her birthday cake to her teacher. Teacher asked Sheila -"The sponginess and softness in the cake is because of which gas”?
Answer» Sheila offered her birthday cake to her teacher. Teacher asked Sheila -"The sponginess and softness in the cake is because of which gas”?

Discussion

4682.	Which of the following statement regarding Avogadro's law is incorrect?
Answer» Which of the following statement regarding Avogadro's law is incorrect?

Discussion

4683.	Question 310 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralize it will be:1. 4 mL2. 8 mL3. 12 mL4. 16 mL
Answer» Question 3 10 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralize it will be: 1. 4 mL 2. 8 mL 3. 12 mL 4. 16 mL

Discussion

4684.	"pH of a solution depends upon the temperature"- explain why is this so.
Answer» "pH of a solution depends upon the temperature"- explain why is this so.

Discussion

4685.	pH of 0.05 M aqueous solution of weak acid HA (Ka = 4 × 10–4) is
Answer» pH of 0.05 M aqueous solution of weak acid HA (Ka = 4 × 10–4) is

Discussion

4686.

The electronegativities (according to Pauling) of the elements in period 3 of the periodic table are as follows. The elements are arranged in alphabetical order: Al Cl Mg Na P S Si 1.5 3.0 1.2 0.9 2.1 2.5 1.8 (i) Arrange the elements in the order in which they occur in the periodic table from left to right. (The group 1 elements first, followed by the group 2 element and so on, up to group 7.)(ii) Choose the word or phrase from the brackets which correctly completes each of the following statements:(a) The element below sodium in the same group would be expected to have a _____ (lower/higher) electronegativity than sodium and the element above chlorine which would be expected to have a (lower/higher) ionization potential than chlorine.(b) On moving from left to right in a given period, the number of shells _ (remains the same/increases/decreases).(c) On moving down a group, the number of valence electrons ______ (remains the same/increases/decreases).

Answer» The electronegativities (according to Pauling) of the elements in period 3 of the periodic table are as follows. The elements are arranged in alphabetical order:

Al	Cl	Mg	Na	P	S	Si
1.5	3.0	1.2	0.9	2.1	2.5	1.8

(i) Arrange the elements in the order in which they occur in the periodic table from left to right. (The group 1 elements first, followed by the group 2 element and so on, up to group 7.)

(ii) Choose the word or phrase from the brackets which correctly completes each of the following statements:

(a) The element below sodium in the same group would be expected to have a _________ (lower/higher) electronegativity than sodium and the element above chlorine which would be expected to have a ________ (lower/higher) ionization potential than chlorine.

(b) On moving from left to right in a given period, the number of shells _________ (remains the same/increases/decreases).

(c) On moving down a group, the number of valence electrons __________ (remains the same/increases/decreases).

Discussion

4687.	Name the gas evolved in following case:The gas produced by the action of concentrated sulphuric acid on sodium chloride.
Answer» Name the gas evolved in following case: The gas produced by the action of concentrated sulphuric acid on sodium chloride.

Discussion

4688.	Metals, non-metals and metalloids are present in ___ block.
Answer» Metals, non-metals and metalloids are present in ___ block.

Discussion

4689.	7. A molecule contain 0.016% sulphur by mass. If number of sulphur atom per molecule is 3. Determine molecular weight
Answer» 7. A molecule contain 0.016% sulphur by mass. If number of sulphur atom per molecule is 3. Determine molecular weight

Discussion

4690.	What is benzene?- Siddhartha
Answer» What is benzene?- Siddhartha

Discussion

4691.	A metal sulphide X reacts with acid Y to form sodium sulphate and hydrogen sulphide. So, Y is __.
Answer» A metal sulphide X reacts with acid Y to form sodium sulphate and hydrogen sulphide. So, Y is __.

Discussion

4692.	Complete the following reactions and balance them: [5 MARKS] (i) NaCI+H2SO4<200∘C−−−−−→ (ii) NaCI+H2SO4>200∘C−−−−−→ (iii) NH3+HCl→ (iv) Na2CO3+HCl→ (v) Cu(NO3)2+HCl→
Answer» Complete the following reactions and balance them: [5 MARKS] (i) $N a C I + H_{2} S O_{4} < 200 \circ C - ---- \to$ (ii) $N a C I + H_{2} S O_{4} > 200 \circ C - ---- \to$ (iii) $N H_{3} + H C l \to$ (iv) $N a_{2} C O_{3} + H C l \to$ (v) $C u (N O_{3})_{2} + H C l \to$

Discussion

4693.	Compare hydrogen with alkali metals on the basis of formation of ion.
Answer» Compare hydrogen with alkali metals on the basis of formation of ion.

Discussion

4694.	100 ml sample of a 0.5M solution of a diprotic acid is titrated against the strong base NaOH. Molarity of NaOH(aq) is 0.5M. What is the minimum volume of 0.5M NaOH required to reach a pH of 8? ( Give pKa1 and pKa2 of H2A are 5 and 8)
Answer» 100 ml sample of a 0.5M solution of a diprotic acid is titrated against the strong base NaOH. Molarity of NaOH(aq) is 0.5M. What is the minimum volume of 0.5M NaOH required to reach a pH of 8? ( Give pKa1 and pKa2 of H2A are 5 and 8)

Discussion

4695.	zinc reacts with concentrated nitric acid to produce zinc nitrate and nitrogen dioxide and oxygen balance this equation
Answer» zinc reacts with concentrated nitric acid to produce zinc nitrate and nitrogen dioxide and oxygen balance this equation

Discussion

4696.	Chlorine reacts with saturated hydrocarbons at room temperature in the : (a) absence of sunlight (b) presence of sunlight (c) absence of moisture (d) presence of H2SO4
Answer» Chlorine reacts with saturated hydrocarbons at room temperature in the : (a) absence of sunlight (b) presence of sunlight (c) absence of moisture (d) presence of $H_{2} S O_{4}$

Discussion

4697.	a mixture of n2 and h2 at equilibrium at 600k. total pressure 80atm. if initial ratio molar mass of n2 and h2 are 3:1 and at equilibrium NH3 is 10%by volume calulate Kp of reaction
Answer» a mixture of n2 and h2 at equilibrium at 600k. total pressure 80atm. if initial ratio molar mass of n2 and h2 are 3:1 and at equilibrium NH3 is 10%by volume calulate Kp of reaction

Discussion

4698.	(i) What happens when zinc granules are treated with dilute solution of H2SO4? Also write the chemical equations if reaction occurs.(ii) What happens when zinc granules are treated with dilute solution of HCl? Also write the chemical equations if reaction occurs.(iii) What happens when zinc granules are treated with dilute solution of HNO3? Also write the chemical equations if reaction occurs.(iv) What happens when zinc granules are treated with dilute solution of NaCl? Also write the chemical equations if reaction occurs.(v) What happens when zinc granules are treated with dilute solution of NaOH? Also write the chemical equations if reaction occurs.
Answer» (i) What happens when zinc granules are treated with dilute solution of $H_{2} S O_{4}$ ? Also write the chemical equations if reaction occurs. (ii) What happens when zinc granules are treated with dilute solution of HCl? Also write the chemical equations if reaction occurs. (iii) What happens when zinc granules are treated with dilute solution of $H N O_{3}$ ? Also write the chemical equations if reaction occurs. (iv) What happens when zinc granules are treated with dilute solution of NaCl? Also write the chemical equations if reaction occurs. (v) What happens when zinc granules are treated with dilute solution of NaOH? Also write the chemical equations if reaction occurs.

Discussion

4699.	Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?
Answer» Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

Discussion

4700.	10. If two elements having electronegativity value is 1.2 & 3.0 then which type of bond formed between these two elements?
Answer» 10. If two elements having electronegativity value is 1.2 & 3.0 then which type of bond formed between these two elements?

Discussion

Explore topic-wise InterviewSolutions in .

How many maximum no. of electrons can be accommodated in the d-subshell?10

34 g of ammonia is decomposed to _________ g of nitrogen and _____ g of hydrogen, _____ is the ratio of hydrogen to nitrogen by mass. The options in blanks are respectively:

Polonium is named after ________.

Which of the following is/are correct about SO2?

Which two gases each change the colour of damp red litmus paper?

Find the total percentage of oxygen in magnesium nitrate crystal Mg(NO3)2·6H2O.[H = 1, N = 14, O = 16, Mg = 24]

Which of the following compound liberates CO2 when treated with NaHCO3- (1) CH3COCH2NH2 (2) CH3NH2 (3) (CH3)4N^+OH^- (4) CH3N^+H3Cl^-

31 : If nh3 is a strong field ligand then in Cr(NH3)+3 there are 3unpaired electrons instead of 1 unpaired electrons.Why?

Why does air when passes through small holes produces sounds??

What is the reason that although having 5 electrons in outermost shell, nitrogen generally shows only valency 3 but phosphorus shows both valencies 3 and 5.

The sun delivers 103 Wm−2 of electromagnetic flux to the earth’s surface. The total power that is incident on a roof of dimensions 8 m×20 m will be-

Energy required for the ionisation of 0.02g atom of magnesium is xkJ. the amount of energy required to ionise 1 atom of magnesium will be

Derive the expression for pH of hydrolysis of Ammonium carbonate (Nh4)2CO3.

In Metallurgy, which of the following terms are popular methods of concentration?

Answer the following questions.a.Explain the difference between acid and alkali.b.Why indicator does not get affected by salt?c.Which substances are produced by neutralization process?d.Which are the industrial uses of adids ?

Which of the following property is shown by acids?

1.nitrogen reacts with hydrogen to give ammonia.Calculate the volume of the ammonia gas formed when nitrogen reacts with 6 liters of hydrogen.All gases measures at s.t.p ,using Gay lussacs law ,with step by step process

Name three common forms in which metals occur in nature.How do metals interact with dilute acids?

What is C in the constant k in the formula of electric formula?

Question 5Which of the following oxide(s) of iron would be obtained on a prolonged reaction of iron with steam?(a) FeO(b) Fe2O3(c) Fe3O4(d) Fe2O3 and Fe3O4

Ifan electron has spin quantum number of + 1/2 and a magnetic quantum number of -1, it cannot berepresented in an

What change would you observe on adding: 1) Blue litmus solution to an aqueous solution of washing soda 2) Red litmus solution to an aqueous solution of washing soda

The oxygen family is also known as:

Is CaCO3 a base or a salt?

Arrange the following in an increasing order of strengths of oxidizing powers of the following:

How to determine R and S configuration of (+)-4-methylcyclohexene?

Aqueous solution of nickel sulphate contains Ni2+ and SO42− ions.(a) Which ion moves towards the cathode?(b) What is the product at the anode?

Sheila offered her birthday cake to her teacher. Teacher asked Sheila -"The sponginess and softness in the cake is because of which gas”?

Which of the following statement regarding Avogadro's law is incorrect?

Question 310 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralize it will be:1. 4 mL2. 8 mL3. 12 mL4. 16 mL

"pH of a solution depends upon the temperature"- explain why is this so.

pH of 0.05 M aqueous solution of weak acid HA (Ka = 4 × 10–4) is

Name the gas evolved in following case:The gas produced by the action of concentrated sulphuric acid on sodium chloride.

Metals, non-metals and metalloids are present in ___ block.

7. A molecule contain 0.016% sulphur by mass. If number of sulphur atom per molecule is 3. Determine molecular weight

What is benzene?- Siddhartha

A metal sulphide X reacts with acid Y to form sodium sulphate and hydrogen sulphide. So, Y is __.

Complete the following reactions and balance them: [5 MARKS] (i) NaCI+H2SO4&lt;200∘C−−−−−→ (ii) NaCI+H2SO4&gt;200∘C−−−−−→ (iii) NH3+HCl→ (iv) Na2CO3+HCl→ (v) Cu(NO3)2+HCl→

Compare hydrogen with alkali metals on the basis of formation of ion.

100 ml sample of a 0.5M solution of a diprotic acid is titrated against the strong base NaOH. Molarity of NaOH(aq) is 0.5M. What is the minimum volume of 0.5M NaOH required to reach a pH of 8? ( Give pKa1 and pKa2 of H2A are 5 and 8)

zinc reacts with concentrated nitric acid to produce zinc nitrate and nitrogen dioxide and oxygen balance this equation

Chlorine reacts with saturated hydrocarbons at room temperature in the : (a) absence of sunlight (b) presence of sunlight (c) absence of moisture (d) presence of H2SO4

a mixture of n2 and h2 at equilibrium at 600k. total pressure 80atm. if initial ratio molar mass of n2 and h2 are 3:1 and at equilibrium NH3 is 10%by volume calulate Kp of reaction

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

10. If two elements having electronegativity value is 1.2 & 3.0 then which type of bond formed between these two elements?

34 g of ammonia is decomposed to _______ g of nitrogen and _ g of hydrogen, ___ is the ratio of hydrogen to nitrogen by mass. The options in blanks are respectively:

Complete the following reactions and balance them: [5 MARKS] (i) NaCI+H2SO4<200∘C−−−−−→ (ii) NaCI+H2SO4>200∘C−−−−−→ (iii) NH3+HCl→ (iv) Na2CO3+HCl→ (v) Cu(NO3)2+HCl→