10223 + Interview Questions in Chemistry Page 34 InterviewSolution

1651.	uses of nitrogen dioxide
Answer» uses of nitrogen dioxide

Discussion

1652.	Question 1 Which of the following correctly represents 360 g of water? (i) 2 moles of H2O (ii) 20 moles of water (iii) 6.022×1023 molecules of water (iv) 1.2044×1025 molecules of water (a) (i) (b) (i) and (iv) (c) (ii) and (iii) (d) (ii) and (iv)
Answer» Question 1 Which of the following correctly represents 360 g of water? (i) 2 moles of $H_{2} O$ (ii) 20 moles of water (iii) $6.022 \times 10^{23}$ molecules of water (iv) $1.2044 \times 10^{25}$ molecules of water (a) (i) (b) (i) and (iv) (c) (ii) and (iii) (d) (ii) and (iv)

1652.

Question 1 Which of the following correctly represents 360 g of water? (i) 2 moles of H2O (ii) 20 moles of water (iii) 6.022×1023 molecules of water (iv) 1.2044×1025 molecules of water (a) (i) (b) (i) and (iv) (c) (ii) and (iii) (d) (ii) and (iv)

Answer»

Question 1
Which of the following correctly represents 360 g of water?

(i) 2 moles of $H_{2} O$

(ii) 20 moles of water

(iii) $6.022 \times 10^{23}$ molecules of water

(iv)

1.2044 \times 10^{25}

molecules of water
(a) (i)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)

Discussion

1653.	Statement 1: Plastic rod becomes negatively charged when rubbed with a cloth.Statement 1: Glass rod becomes positively charged when rubbed with a cloth.Explain both the statements.
Answer» Statement 1: Plastic rod becomes negatively charged when rubbed with a cloth. Statement 1: Glass rod becomes positively charged when rubbed with a cloth. Explain both the statements.

Discussion

1654.	Which of the following gases would be responsible for acid rain?
Answer» Which of the following gases would be responsible for acid rain?

Discussion

1655.	Energy required to dislodge electron frrom excited isolated H atom ? Ionisation Energy : 13.6eV 13.6 >13.6 13.6 =
Answer» Energy required to dislodge electron frrom excited isolated H atom ? Ionisation Energy : 13.6eV 13.6 >13.6 <3.4and >13.6 =<3.4 EV

Discussion

1656.	What were some useful applications of the plum-pudding model? [2 MARKS]
Answer» What were some useful applications of the plum-pudding model? [2 MARKS]

Discussion

1657.	One mole of an element contains ( 4.2 × 10^{24} ) no. of electrons. What is the atomic number of the element ?
Answer» One mole of an element contains ( 4.2 × 10^{24} ) no. of electrons. What is the atomic number of the element ?

Discussion

1658.	24. the correct formula to calculate the hydroxyl ion concentration of an aqueous solution of c6h5nh3+cl- is: a)root [(CKw)/Kb] b)root [(KwKb)/C] c)root [(CKw)/Ka] d)root [(KaKw)/C]
Answer» 24. the correct formula to calculate the hydroxyl ion concentration of an aqueous solution of c6h5nh3+cl- is: a)root [(CKw)/Kb] b)root [(KwKb)/C] c)root [(CKw)/Ka] d)root [(KaKw)/C]

Discussion

1659.	Which of the following is correct for a speccific latent heat of a substance?
Answer» Which of the following is correct for a speccific latent heat of a substance?

Discussion

1660.	Question 4 (b) Explain the following giving examples. b. Pure substance
Answer» Question 4 (b) Explain the following giving examples. b. Pure substance

Discussion

1661.	Red hot carbon will remove oxygen from the oxide XO and YObut not from ZO. Y will remove oxygen from XO. Use thisevidence to deduce the order of activity of the three metals X,Y and Z putting the most active first:(a) XYZ(b) ZYX(c) YXZ(d) ZXY
Answer» Red hot carbon will remove oxygen from the oxide XO and YO but not from ZO. Y will remove oxygen from XO. Use this evidence to deduce the order of activity of the three metals X, Y and Z putting the most active first: (a) XYZ (b) ZYX (c) YXZ (d) ZXY

Discussion

1662.	Is the atomic number of O2 and 03 are same
Answer» Is the atomic number of O2 and 03 are same

Discussion

1663.	Potassium manganate (K2MnO4) is formed when:
Answer» Potassium manganate $(K_{2} M n O_{4})$ is formed when:

Discussion

1664.	How does shielding effect determines the energy of electron incase of multi-electronic species?
Answer» How does shielding effect determines the energy of electron incase of multi-electronic species?

Discussion

1665.	The correct order of electron gain enthalpy is :
Answer» The correct order of electron gain enthalpy is :

Discussion

1666.	if a certain oxide of nitrogen weighing 0.11g gives 56ml of nitrogen and other oxide of nitrogen weighing 0.15g gives the same volume of nitrogen show law of multiple proportio
Answer» if a certain oxide of nitrogen weighing 0.11g gives 56ml of nitrogen and other oxide of nitrogen weighing 0.15g gives the same volume of nitrogen show law of multiple proportio

Discussion

1667.	1 mole of helium gas of 57°C mixed with 1 mole argon gas of 27°C. what is the final temperature?
Answer» 1 mole of helium gas of 57°C mixed with 1 mole argon gas of 27°C. what is the final temperature?

Discussion

1668.	Is molecular formula and elemental formula of an element are different?If yes,then what is the difference.
Answer» Is molecular formula and elemental formula of an element are different?If yes,then what is the difference.

Discussion

1669.	When a bowl of an ice-cream is exposed to sun rays, it will _______.
Answer» When a bowl of an ice-cream is exposed to sun rays, it will _______.

Discussion

1670.	When ferrous sulphate is heated the following reaction takes place: 2FeSO4(s)→Fe2O3(s)+SO2(g)+SO3(g) The above reaction is called __________ of ferrous sulphate.
Answer» When ferrous sulphate is heated the following reaction takes place: $2 F e S O_{4} (s) \to F e_{2} O_{3} (s) + S O_{2} (g) + S O_{3} (g)$ The above reaction is called __________ of ferrous sulphate.

1670.

When ferrous sulphate is heated the following reaction takes place: 2FeSO4(s)→Fe2O3(s)+SO2(g)+SO3(g) The above reaction is called __________ of ferrous sulphate.

Answer»

When ferrous sulphate is heated the following reaction takes place:

$2 F e S O_{4} (s) \to F e_{2} O_{3} (s) + S O_{2} (g) + S O_{3} (g)$

The above reaction is called __________ of ferrous sulphate.

Discussion

1671.	What is the synonym of the underlined word? Rajesh’s style is very flamboyant. It is evident in his use of bright colours and stylish designs.
Answer» What is the synonym of the underlined word? Rajesh’s style is very flamboyant. It is evident in his use of bright colours and stylish designs.

1671.

What is the synonym of the underlined word? Rajesh’s style is very flamboyant. It is evident in his use of bright colours and stylish designs.

Answer»

What is the synonym of the underlined word?

Rajesh’s style is very flamboyant. It is evident in his use of bright colours and stylish designs.

Discussion

1672.	among the following the energy of 2s orbital is lowest in Li,Na,H,
Answer» among the following the energy of 2s orbital is lowest in Li,Na,H,

Discussion

1673.	What are the differences between physical and chemical changes?
Answer» What are the differences between physical and chemical changes?

Discussion

1674.	What is meant by mole and molecular mass
Answer» What is meant by mole and molecular mass

Discussion

1675.	1. gas Kh(K bar) A 0.05 B 0.3 C 0.25 the solubility of gases in order of increase in temperature is a)A > B > C b)B > C > A c)A > C > B d)C > B > A
Answer» 1. gas Kh(K bar) A 0.05 B 0.3 C 0.25 the solubility of gases in order of increase in temperature is a)A > B > C b)B > C > A c)A > C > B d)C > B > A

Discussion

1676.	What is evaporation? State the various factors which affect evaporation.(b) Why does evaporation cool a liquid?
Answer» What is evaporation? State the various factors which affect evaporation. (b) Why does evaporation cool a liquid?

Discussion

1677.	Identify which of the following is homogenous mixture or heterogeneous one. Also identify the type of constituents in mixture (e.g. gas in gas, gas in liquid, gas in solid etc.) a. Air (N2+O2) b. Water and Oil c. Hydrogen in Palladium d. Aerated Water (CO2+H2O ) e. Chalk in water f. Ethyl Alcohol in Water g. Alloys e.g. brass h. Sand + ammonium chloride i. Mercury in amalgamated Zinc [5 MARKS]
Answer» Identify which of the following is homogenous mixture or heterogeneous one. Also identify the type of constituents in mixture (e.g. gas in gas, gas in liquid, gas in solid etc.) a. Air ( $N_{2} + O_{2}$ ) b. Water and Oil c. Hydrogen in Palladium d. Aerated Water ( $C O_{2} + H_{2} O$ ) e. Chalk in water f. Ethyl Alcohol in Water g. Alloys e.g. brass h. Sand + ammonium chloride i. Mercury in amalgamated Zinc [5 MARKS]

Discussion

1678.	What is the basic principle behind simple distillation process?
Answer» What is the basic principle behind simple distillation process?

Discussion

1679.	Define. (a) Melting point (b) Boiling point (c) Distillation.
Answer» Define. (a) Melting point (b) Boiling point (c) Distillation.

1679.

Define. (a) Melting point (b) Boiling point (c) Distillation.

Answer»

Define.

(a) Melting point (b) Boiling point

(c) Distillation.

Discussion

1680.	Compare all the proposed models of an atom given in this chapter.
Answer» Compare all the proposed models of an atom given in this chapter.

Discussion

1681.	Which subatomic particles contribute to the formation of molecules?
Answer» Which subatomic particles contribute to the formation of molecules?

Discussion

1682.	What is the relation between molarity(M), molality(m) and density of solution d (in g/mL)?
Answer» What is the relation between molarity(M), molality(m) and density of solution d (in g/mL)?

Discussion

1683.	Two metallic oxides contain 27.6% and 30% oxygen respectively. If formula of first oxide is Y3O4, then the formula of second will be Options: YO YO2 Y2O Should have chosen Y2O3
Answer» Two metallic oxides contain 27.6% and 30% oxygen respectively. If formula of first oxide is Y3O4, then the formula of second will be Options: YO YO2 Y2O Should have chosen Y2O3

Discussion

1684.	Calculate the mass of water required to make 200gm of 25% solution of glucose.
Answer» Calculate the mass of water required to make 200gm of 25% solution of glucose.

Discussion

1685.	what is thermal dissociation?
Answer» what is thermal dissociation?

Discussion

1686.	Select the basic and acidic radicals in the following compounds. (a) MgSO4 (b) (NH4)2SO4 (c) Al2(SO4)3 (d) ZnCO3 (e) Mg(OH)2
Answer» Select the basic and acidic radicals in the following compounds. (a) $M g S O_{4}$ (b) $(N H_{4})_{2} S O_{4}$ (c) $A l_{2} (S O_{4})_{3}$ (d) $Z n C O_{3}$ (e) $M g (O H)_{2}$

1686.

Select the basic and acidic radicals in the following compounds. (a) MgSO4 (b) (NH4)2SO4 (c) Al2(SO4)3 (d) ZnCO3 (e) Mg(OH)2

Answer»

Select the basic and acidic radicals in the following compounds.

(a) $M g S O_{4}$ (b) $(N H_{4})_{2} S O_{4}$

(c) $A l_{2} (S O_{4})_{3}$ (d) $Z n C O_{3}$

(e) $M g (O H)_{2}$

Discussion

1687.	Which of the following industry uses the process of seeding?
Answer» Which of the following industry uses the process of seeding?

Discussion

1688.	The elements having the same number of protons but different numbers of neutrons are known as _________. What are the atomic number and mass number of an isotope of carbon 146C ? Referring to question 2, Find the number of electrons, protons and neutrons in an atom.
Answer» The elements having the same number of protons but different numbers of neutrons are known as _________. What are the atomic number and mass number of an isotope of carbon $146 C$ ? Referring to question 2, Find the number of electrons, protons and neutrons in an atom.

1688.

The elements having the same number of protons but different numbers of neutrons are known as _________. What are the atomic number and mass number of an isotope of carbon 146C ? Referring to question 2, Find the number of electrons, protons and neutrons in an atom.

Answer»

The elements having the same number of protons but different numbers of neutrons are known as _________.

What are the atomic number and mass number of an isotope of carbon $146 C$ ?

Referring to question 2, Find the number of electrons, protons and neutrons in an atom.

Discussion

1689.	The statement not true about graphite is:
Answer» The statement not true about graphite is:

Discussion

1690.	Why does our palm feel cold when we put some acetone (or perfume) on it?
Answer» Why does our palm feel cold when we put some acetone (or perfume) on it?

Discussion

1691.	Which among the given acids is a monobasic acid?
Answer» Which among the given acids is a monobasic acid?

Discussion

1692.	In the following picture identify the compound which can be called as a mixture.
Answer» In the following picture identify the compound which can be called as a mixture.

1692.

In the following picture identify the compound which can be called as a mixture.

Answer»

In the following picture identify the compound which can be called as a mixture.

Discussion

1693.	The correct option for the value of vapour pressure of a solution at 45∘C with benzene to octane in molar ratio 3:2 is :[At 45∘C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]
Answer» The correct option for the value of vapour pressure of a solution at $45^{\circ} C$ with benzene to octane in molar ratio $3 : 2$ is : [At $45^{\circ} C$ vapour pressure of benzene is $280 m m H g$ and that of octane is $420 m m H g .$ Assume Ideal gas]

Discussion

1694.	List five characteristics by which compounds can be distinguished from mixtures.
Answer» List five characteristics by which compounds can be distinguished from mixtures.

Discussion

1695.	Write down the concentration of each of the following solutions in g/L and mol/L.a. 7.3g HCl in 100ml solutionb. 2g NaOH in 50ml solutionc. 3g CH3COOH in 100ml solutiond. 4.9g H2SO4 in 200ml solution
Answer» Write down the concentration of each of the following solutions in g/L and mol/L. a. 7.3g HCl in 100ml solution b. 2g NaOH in 50ml solution c. 3g CH₃COOH in 100ml solution d. 4.9g H₂SO₄in 200ml solution

Discussion

1696.	Why is the bond angle between C and H atom in CH4 109.5 and not 90?
Answer» Why is the bond angle between C and H atom in CH4 109.5 and not 90?

Discussion

1697.	Potash alum is an example of a:
Answer» Potash alum is an example of a:

Discussion

1698.	In which of the following formula mass preferred over molecular mass ? (1) Kcl (2) c2h6 (3)n2 (4)h2
Answer» In which of the following formula mass preferred over molecular mass ? (1) Kcl (2) c2h6 (3)n2 (4)h2

Discussion

1699.	what is use of BEC state of matter
Answer» what is use of BEC state of matter

Discussion

1700.	In Nessler's reagent, the ion present is :
Answer» In Nessler's reagent, the ion present is :

Discussion

Explore topic-wise InterviewSolutions in .

uses of nitrogen dioxide

Question 1 Which of the following correctly represents 360 g of water? (i) 2 moles of H2O (ii) 20 moles of water (iii) 6.022×1023 molecules of water (iv) 1.2044×1025 molecules of water (a) (i) (b) (i) and (iv) (c) (ii) and (iii) (d) (ii) and (iv)

Statement 1: Plastic rod becomes negatively charged when rubbed with a cloth.Statement 1: Glass rod becomes positively charged when rubbed with a cloth.Explain both the statements.

Which of the following gases would be responsible for acid rain?

Energy required to dislodge electron frrom excited isolated H atom ? Ionisation Energy : 13.6eV 13.6 >13.6 13.6 =

What were some useful applications of the plum-pudding model? [2 MARKS]

One mole of an element contains ( 4.2 × 10^{24} ) no. of electrons. What is the atomic number of the element ?

24. the correct formula to calculate the hydroxyl ion concentration of an aqueous solution of c6h5nh3+cl- is: a)root [(C*Kw)/Kb] b)root [(Kw*Kb)/C] c)root [(C*Kw)/Ka] d)root [(Ka*Kw)/C]

Which of the following is correct for a speccific latent heat of a substance?

Question 4 (b) Explain the following giving examples. b. Pure substance

Red hot carbon will remove oxygen from the oxide XO and YObut not from ZO. Y will remove oxygen from XO. Use thisevidence to deduce the order of activity of the three metals X,Y and Z putting the most active first:(a) XYZ(b) ZYX(c) YXZ(d) ZXY

Is the atomic number of O2 and 03 are same

Potassium manganate (K2MnO4) is formed when:

How does shielding effect determines the energy of electron incase of multi-electronic species?

The correct order of electron gain enthalpy is :

if a certain oxide of nitrogen weighing 0.11g gives 56ml of nitrogen and other oxide of nitrogen weighing 0.15g gives the same volume of nitrogen show law of multiple proportio

1 mole of helium gas of 57°C mixed with 1 mole argon gas of 27°C. what is the final temperature?

Is molecular formula and elemental formula of an element are different?If yes,then what is the difference.

When a bowl of an ice-cream is exposed to sun rays, it will _______.

When ferrous sulphate is heated the following reaction takes place: 2FeSO4(s)→Fe2O3(s)+SO2(g)+SO3(g) The above reaction is called __________ of ferrous sulphate.

What is the synonym of the underlined word? Rajesh’s style is very flamboyant. It is evident in his use of bright colours and stylish designs.

among the following the energy of 2s orbital is lowest in Li,Na,H,

What are the differences between physical and chemical changes?

What is meant by mole and molecular mass

1. gas Kh(K bar) A 0.05 B 0.3 C 0.25 the solubility of gases in order of increase in temperature is a)A > B > C b)B > C > A c)A > C > B d)C > B > A

What is evaporation? State the various factors which affect evaporation.​(b) Why does evaporation cool a liquid?

What is the basic principle behind simple distillation process?

Define. (a) Melting point (b) Boiling point (c) Distillation.

Compare all the proposed models of an atom given in this chapter.​

Which subatomic particles contribute to the formation of molecules?

What is the relation between molarity(M), molality(m) and density of solution d (in g/mL)?

Two metallic oxides contain 27.6% and 30% oxygen respectively. If formula of first oxide is Y3O4, then the formula of second will be Options: YO YO2 Y2O Should have chosen Y2O3

Calculate the mass of water required to make 200gm of 25% solution of glucose.

what is thermal dissociation?

Select the basic and acidic radicals in the following compounds. (a) MgSO4 (b) (NH4)2SO4 (c) Al2(SO4)3 (d) ZnCO3 (e) Mg(OH)2

Which of the following industry uses the process of seeding?

The elements having the same number of protons but different numbers of neutrons are known as _________. What are the atomic number and mass number of an isotope of carbon 146C ? Referring to question 2, Find the number of electrons, protons and neutrons in an atom.

The statement not true about graphite is:

Why does our palm feel cold when we put some acetone (or perfume) on it?

Which among the given acids is a monobasic acid?

In the following picture identify the compound which can be called as a mixture.

The correct option for the value of vapour pressure of a solution at 45∘C with benzene to octane in molar ratio 3:2 is :[At 45∘C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]

List five characteristics by which compounds can be distinguished from mixtures.

Write down the concentration of each of the following solutions in g/L and mol/L.a. 7.3g HCl in 100ml solutionb. 2g NaOH in 50ml solutionc. 3g CH3COOH in 100ml solutiond. 4.9g H2SO4 in 200ml solution

Why is the bond angle between C and H atom in CH4 109.5 and not 90?

Potash alum is an example of a:

In which of the following formula mass preferred over molecular mass ? (1) Kcl (2) c2h6 (3)n2 (4)h2

what is use of BEC state of matter

In Nessler's reagent, the ion present is :

24. the correct formula to calculate the hydroxyl ion concentration of an aqueous solution of c6h5nh3+cl- is: a)root [(CKw)/Kb] b)root [(KwKb)/C] c)root [(CKw)/Ka] d)root [(KaKw)/C]

What is evaporation? State the various factors which affect evaporation.(b) Why does evaporation cool a liquid?

Compare all the proposed models of an atom given in this chapter.