10223 + Interview Questions in Chemistry

1.	In any period, the valency of an element
Answer» In any period, the valency of an element

1.

In any period, the valency of an element

Answer»

In any period, the valency of an element

2.	Explain the following:a. What is the role of anomalous behaviour of water in preserving aquatic life in regions of cold climate?b. How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew?c. In cold regions in winter, the rocks crack due to anomolous expansion of water.
Answer» Explain the following: a. What is the role of anomalous behaviour of water in preserving aquatic life in regions of cold climate? b. How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew? c. In cold regions in winter, the rocks crack due to anomolous expansion of water.

Discussion

3.	Why are some salts coloured only in their hydrated forms? For eg: hydrated copper sulphate
Answer» Why are some salts coloured only in their hydrated forms? For eg: hydrated copper sulphate

Discussion

4.	The following statement was given by 4 Students Rahul; Rita Manu and Kritika Rahul--crystals of Lead Nitrate when heated strongly produce a reddish brown gas Rita--production of nitric oxide by heating nitrogen and oxygen at high temperature is an exothermic process Manu--slaking of lime is an endothermic process Kritika--when hydrogen is passed over heated black copper oxide oxidation and reduction reaction occurs simultaneously
Answer» The following statement was given by 4 Students Rahul; Rita Manu and Kritika Rahul--crystals of Lead Nitrate when heated strongly produce a reddish brown gas Rita--production of nitric oxide by heating nitrogen and oxygen at high temperature is an exothermic process Manu--slaking of lime is an endothermic process Kritika--when hydrogen is passed over heated black copper oxide oxidation and reduction reaction occurs simultaneously

Discussion

5.	The kelvin temperature in 270 K. What is the corresponding Celsius scale temperature ?
Answer» The kelvin temperature in 270 K. What is the corresponding Celsius scale temperature ?

Discussion

6.	The following substances contain _______.
Answer» The following substances contain _______.

Discussion

7.	You might have observed on a dry day that when you touch the screen of a television or computer monitor (with picture tube), you get a slight shock. Why does it happen?
Answer» You might have observed on a dry day that when you touch the screen of a television or computer monitor (with picture tube), you get a slight shock. Why does it happen?

Discussion

8.	how to find that which molecule or compound has greater surface area ?
Answer» how to find that which molecule or compound has greater surface area ?

Discussion

9.	ntThe amount of heat energy required to raise the temperature of 1g heliumat NTP from T1K to T2K is?n
Answer» ntThe amount of heat energy required to raise the temperature of 1g heliumat NTP from T1K to T2K is?n

Discussion

10.	5. A sample of a hydrate of Barium Chloride weighing 61 gram was heated until all the water of hydration is removed. the dried sample weighed 52 gram. The formula of the hydrated salt is:
Answer» 5. A sample of a hydrate of Barium Chloride weighing 61 gram was heated until all the water of hydration is removed. the dried sample weighed 52 gram. The formula of the hydrated salt is:

Discussion

11.	Law of reciprocal proportion was given by whom
Answer» Law of reciprocal proportion was given by whom

Discussion

12.	For the chemical reaction, N2(g)+3H2(g)→2NH3(g) the correct option is:
Answer» For the chemical reaction, $N_{2} (g) + 3 H_{2} (g) \to 2 N H_{3} (g)$ the correct option is:

Discussion

13.	Which compound is used in photography?
Answer» Which compound is used in photography?

Discussion

14.	Why proton-proton always repel?
Answer» Why proton-proton always repel?

Discussion

15.	Explain any two types of dyes based on their method of application.
Answer» Explain any two types of dyes based on their method of application.

Discussion

16.	Question 25Low visibility during cold weather is due to(a) formation of fossil fuel(b) unburnt carbon particles or hydrocarbons suspended in the air(c) lack of adequate power supply(d) none of these
Answer» Question 25 Low visibility during cold weather is due to (a) formation of fossil fuel (b) unburnt carbon particles or hydrocarbons suspended in the air (c) lack of adequate power supply (d) none of these

Discussion

17.	What do you understand by latent heat of fusion and how it is related to melting point?
Answer» What do you understand by latent heat of fusion and how it is related to melting point?

Discussion

18.	1.What are neucleons ? 2. What is the atomicity of Ca(OH)2?
Answer» 1.What are neucleons ? 2. What is the atomicity of Ca(OH)₂?

Discussion

19.	Which part of the cell performs respiration? Is this part present in a prokaryote? Name the energy currency of the cell? [3 MARKS]
Answer» Which part of the cell performs respiration? Is this part present in a prokaryote? Name the energy currency of the cell? [3 MARKS]

Discussion

20.	How does boiling point of liquid vary with pressure?
Answer» How does boiling point of liquid vary with pressure?

Discussion

21.	from 320 mg of o2, 6.023*10^20 molecules are removed .find the number of moles remained.
Answer» from 320 mg of o2, 6.023*10^20 molecules are removed .find the number of moles remained.

Discussion

22.	Write balanced equation for the reaction between iron and dilute sulphuric acid.
Answer» Write balanced equation for the reaction between iron and dilute sulphuric acid.

Discussion

23.	Which of the following is NOT the possible angular orbital momentum of an electron?h is the Planck constant.
Answer» Which of the following is NOT the possible angular orbital momentum of an electron? $h$ is the Planck constant.

Discussion

24.	60 Why boiling is not possible when liquid is heated in closed vessel?
Answer» 60 Why boiling is not possible when liquid is heated in closed vessel?

Discussion

25.	In a unit cell, atoms A, B, C and D are present atcorners, face-centres, body-centre and edge-centres respectively. If atoms touching one of theplane passing through two diagonally oppositeedges are removed, then formula of compound is(1) ABCD(2) ABD2(3) AB2D2(4) AB4D5
Answer» In a unit cell, atoms A, B, C and D are present atcorners, face-centres, body-centre and edge-centres respectively. If atoms touching one of theplane passing through two diagonally oppositeedges are removed, then formula of compound is(1) ABCD(2) ABD2(3) AB2D2(4) AB4D5

Discussion

26.	Question 36A child wanted to separate the mixture of dyes constituting a sample of ink. He marked a line by the ink on the filter paper and placed the filter paper in a glass containing water as shown in the figure. The filter paper was removed when the water moved near the top of the filter paper.(a) What would you expect to see, if the ink contains three different coloured components?(b) Name the technique used by the child.(c) Suggest one more application of this technique.
Answer» Question 36 A child wanted to separate the mixture of dyes constituting a sample of ink. He marked a line by the ink on the filter paper and placed the filter paper in a glass containing water as shown in the figure. The filter paper was removed when the water moved near the top of the filter paper. (a) What would you expect to see, if the ink contains three different coloured components? (b) Name the technique used by the child. (c) Suggest one more application of this technique.

Discussion

27.	V is the orbital speed of electron in 1st Bohr's orbit without considering the reduced mass of 1H1. If reduced mass is taken into account, orbital speed of electron will be ( consider mass of proton to be 1836 times the mass of electron) A) 1836/1837vB) 1836/1835vC) 1835/1836vD) v
Answer» V is the orbital speed of electron in 1st Bohr's orbit without considering the reduced mass of 1H1. If reduced mass is taken into account, orbital speed of electron will be ( consider mass of proton to be 1836 times the mass of electron) A) 1836/1837v B) 1836/1835v C) 1835/1836v D) v

Discussion

28.	Question 14What is a neutralization reaction? Give two examples.
Answer» Question 14 What is a neutralization reaction? Give two examples.

Discussion

29.	In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected?
Answer» In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected?

Discussion

30.	Calculate the molar mass of HNO3 Ettyne C2H2 HCL
Answer» Calculate the molar mass of HNO3 Ettyne C2H2 HCL

30.

Calculate the molar mass of HNO3 Ettyne C2H2 HCL

Answer»

Calculate the molar mass of

HNO3

Ettyne C2H2

HCL

Discussion

31.	How to find %yield minimum molecular mass
Answer» How to find %yield minimum molecular mass

Discussion

32.	How to calculate the ratio by mass of any compound?
Answer» How to calculate the ratio by mass of any compound?

Discussion

33.	how to find formula of the compound by knowing the elements contributional percentage in the compound and their atomic weight?
Answer» how to find formula of the compound by knowing the elements contributional percentage in the compound and their atomic weight?

Discussion

34.	20555 mg of a 1:1 electrolytes (mol. wt. = 100) are dissolved in 500 g of water. The freezing point of the solution is −0.74 o C, Kf=1.8 K m−1. The degree of ionisation of electrolyte is:
Answer» $20555 mg$ of a $1 : 1$ electrolytes (mol. wt. = 100) are dissolved in $500 g$ of water. The freezing point of the solution is $- 0.74^{o} C$ , $K_{f} = 1.8 {K m}^{- 1}$ . The degree of ionisation of electrolyte is:

Discussion

35.	Find the number of atoms in 62 g of phosphorous if its gram atomic mass is 31 g.
Answer» Find the number of atoms in 62 g of phosphorous if its gram atomic mass is 31 g.

Discussion

36.	Molarity and molality of an aqueous solution (mol. wt. of solute of solution will be50) is 9 and 10 respectively. The density of solution will be
Answer» Molarity and molality of an aqueous solution (mol. wt. of solute of solution will be50) is 9 and 10 respectively. The density of solution will be

Discussion

37.	8. What is the oxidation state of each element in sodium nitroprusside and sodium thionitroprusside
Answer» 8. What is the oxidation state of each element in sodium nitroprusside and sodium thionitroprusside

Discussion

38.	3. For decolourization of 1 mole of KMnO, the molesof H2O2 required is (in acidic medium)2(2) 3/2(4) 7/2
Answer» 3. For decolourization of 1 mole of KMnO, the molesof H2O2 required is (in acidic medium)2(2) 3/2(4) 7/2

Discussion

39.	the equivalent mass of a trivalent metal element is 9 g eq^{-1 }the molar mass of its ahydrous oxide is
Answer» the equivalent mass of a trivalent metal element is 9 g eq^{-1 }the molar mass of its ahydrous oxide is

Discussion

40.	\Why does our palm feel cold when we put some acetone or petrol or perfume on it?
Answer» \Why does our palm feel cold when we put some acetone or petrol or perfume on it?

Discussion

41.	quivalent conductances of Ba"and Cl- ionsare 127 and 76 ohm cm respectivelyEquivalent conductance of BaC12 at infinitedilution is(a) 139.5(c) 2032+,(b) 101.5(d) 279(2000)
Answer» quivalent conductances of Ba"and Cl- ionsare 127 and 76 ohm cm respectivelyEquivalent conductance of BaC12 at infinitedilution is(a) 139.5(c) 2032+,(b) 101.5(d) 279(2000)

Discussion

42.	Question 21Classify each of the following on the basis of their atomicity(a) F2 (b) NO2 (c) N2O (d) C2H6 (e) P4 (f) H2O2(g) P4O10 (h) O3 (i) HCI (j) CH4 (k) He (l) Ag
Answer» Question 21 Classify each of the following on the basis of their atomicity (a) $F_{2}$ (b) $N O_{2}$ (c) $N_{2} O$ (d) $C_{2} H_{6}$ (e) $P_{4}$ (f) $H_{2} O_{2}$ (g) $P_{4} O_{10}$ (h) $O_{3}$ (i) $H C I$ (j) $C H_{4}$ (k) $H e$ (l) $A g$

Discussion

43.	9. How to detect the hybridisation of any C-atom in a compound
Answer» 9. How to detect the hybridisation of any C-atom in a compound

Discussion

44.	6. why hydration enthalpy of LiF is low?
Answer» 6. why hydration enthalpy of LiF is low?

Discussion

45.	27. Why was the discovery of neutron late as compared to electron and proton?
Answer» 27. Why was the discovery of neutron late as compared to electron and proton?

Discussion

46.	Which of the following mixtures are incorrectly labelled?
Answer» Which of the following mixtures are incorrectly labelled?

Discussion

47.	The process of melting of ice-cream is considered as:
Answer» The process of melting of ice-cream is considered as:

Discussion

48.	In which pair is the two species Isoelectronic?
Answer» In which pair is the two species Isoelectronic?

Discussion

49.	what is mean by gram equavalent mas
Answer» what is mean by gram equavalent mas

Discussion

50.	Which of the following elements has the same molecular mass as its atomic mass?
Answer» Which of the following elements has the same molecular mass as its atomic mass?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In any period, the valency of an element

Why are some salts coloured only in their hydrated forms? For eg: hydrated copper sulphate

The kelvin temperature in 270 K. What is the corresponding Celsius scale temperature ?

The following substances contain _______.

You might have observed on a dry day that when you touch the screen of a television or computer monitor (with picture tube), you get a slight shock. Why does it happen?

how to find that which molecule or compound has greater surface area ?

ntThe amount of heat energy required to raise the temperature of 1g heliumat NTP from T1K to T2K is?n

5. A sample of a hydrate of Barium Chloride weighing 61 gram was heated until all the water of hydration is removed. the dried sample weighed 52 gram. The formula of the hydrated salt is:

Law of reciprocal proportion was given by whom

For the chemical reaction, N2(g)+3H2(g)→2NH3(g) the correct option is:

Which compound is used in photography?

Why proton-proton always repel?

Explain any two types of dyes based on their method of application.

Question 25Low visibility during cold weather is due to(a) formation of fossil fuel(b) unburnt carbon particles or hydrocarbons suspended in the air(c) lack of adequate power supply(d) none of these

What do you understand by latent heat of fusion and how it is related to melting point?

1.What are neucleons ? 2. What is the atomicity of Ca(OH)2?

Which part of the cell performs respiration? Is this part present in a prokaryote? Name the energy currency of the cell? [3 MARKS]

How does boiling point of liquid vary with pressure?

from 320 mg of o2, 6.023*10^20 molecules are removed .find the number of moles remained.

Write balanced equation for the reaction between iron and dilute sulphuric acid.

Which of the following is NOT the possible angular orbital momentum of an electron?h is the Planck constant.

60 Why boiling is not possible when liquid is heated in closed vessel?

In a unit cell, atoms A, B, C and D are present atcorners, face-centres, body-centre and edge-centres respectively. If atoms touching one of theplane passing through two diagonally oppositeedges are removed, then formula of compound is(1) ABCD(2) ABD2(3) AB2D2(4) AB4D5

V is the orbital speed of electron in 1st Bohr's orbit without considering the reduced mass of 1H1. If reduced mass is taken into account, orbital speed of electron will be ( consider mass of proton to be 1836 times the mass of electron) A) 1836/1837vB) 1836/1835vC) 1835/1836vD) v

Question 14What is a neutralization reaction? Give two examples.

In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected?

Calculate the molar mass of HNO3 Ettyne C2H2 HCL

How to find %yield minimum molecular mass

How to calculate the ratio by mass of any compound?

how to find formula of the compound by knowing the elements contributional percentage in the compound and their atomic weight?

20555 mg of a 1:1 electrolytes (mol. wt. = 100) are dissolved in 500 g of water. The freezing point of the solution is −0.74 o C, Kf=1.8 K m−1. The degree of ionisation of electrolyte is:

Find the number of atoms in 62 g of phosphorous if its gram atomic mass is 31 g.

Molarity and molality of an aqueous solution (mol. wt. of solute of solution will be50) is 9 and 10 respectively. The density of solution will be

8. What is the oxidation state of each element in sodium nitroprusside and sodium thionitroprusside

3. For decolourization of 1 mole of KMnO, the molesof H2O2 required is (in acidic medium)2(2) 3/2(4) 7/2

the equivalent mass of a trivalent metal element is 9 g eq^{-1 }the molar mass of its ahydrous oxide is

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

quivalent conductances of Ba"and Cl- ionsare 127 and 76 ohm cm respectivelyEquivalent conductance of BaC12 at infinitedilution is(a) 139.5(c) 2032+,(b) 101.5(d) 279(2000)

Question 21Classify each of the following on the basis of their atomicity(a) F2 (b) NO2 (c) N2O (d) C2H6 (e) P4 (f) H2O2(g) P4O10 (h) O3 (i) HCI (j) CH4 (k) He (l) Ag

9. How to detect the hybridisation of any C-atom in a compound

6. why hydration enthalpy of LiF is low?

27. Why was the discovery of neutron late as compared to electron and proton?

Which of the following mixtures are incorrectly labelled?

The process of melting of ice-cream is considered as:

In which pair is the two species Isoelectronic?

what is mean by gram equavalent mas

Which of the following elements has the same molecular mass as its atomic mass?