15280 + Interview Questions in Chemistry

1.	Fill in the blanks:(1) The chemical formula of POP is ________(2) The chemical reaction during which H2(g) is lost is termed as ________(3) Corrosion can be prevented by using ________(4) When acids and alkalis react together, ________ and ________ are formed.(5) The chemical reactions in which heat is liberated are called ________ reactions.
Answer» Fill in the blanks: (1) The chemical formula of POP is ________ (2) The chemical reaction during which H_2(g) is lost is termed as ________ (3) Corrosion can be prevented by using ________ (4) When acids and alkalis react together, ________ and ________ are formed. (5) The chemical reactions in which heat is liberated are called ________ reactions.

1.

Fill in the blanks:(1) The chemical formula of POP is (2) The chemical reaction during which H2(g) is lost is termed as (3) Corrosion can be prevented by using (4) When acids and alkalis react together, and are formed.(5) The chemical reactions in which heat is liberated are called reactions.

Answer»

Fill in the blanks:

(1) The chemical formula of POP is ________

(2) The chemical reaction during which H_2(g) is lost is termed as ________

(3) Corrosion can be prevented by using ________

(4) When acids and alkalis react together, ________ and ________ are formed.

(5) The chemical reactions in which heat is liberated are called ________ reactions.

Discussion

2.	Explain the principle used to refine petroleum.
Answer» Explain the principle used to refine petroleum.

Discussion

3.	99 The hydrolysis constant for OCl is 3.0 107 then dissociation constant (Ka ) for HOCl is :- (1) 3.33 109 (2) 3.33 107 (3) 3.33 108 (4) 3.33 106
Answer» 99 The hydrolysis constant for OCl is 3.0 107 then dissociation constant (Ka ) for HOCl is :- (1) 3.33 109 (2) 3.33 107 (3) 3.33 108 (4) 3.33 106

Discussion

4.	How acid or base increases the conductivity of pure water? Explain the process clearly.
Answer» How acid or base increases the conductivity of pure water? Explain the process clearly.

Discussion

5.	30. If 2.24 L of co2 reacts with KOH and forms KHCO3, KHCO3 then reacts with H2SO4 forms K2SO4.Find wt of KHCO3 if reaction is KOH+CO2 =KHCO3
Answer» 30. If 2.24 L of co2 reacts with KOH and forms KHCO3, KHCO3 then reacts with H2SO4 forms K2SO4.Find wt of KHCO3 if reaction is KOH+CO2 =KHCO3

Discussion

6.	Which one of the following can be used as an acid-base indicator by a visually impaired student?(a) Litmus(b) Turmeric(c) Vanilla essence(d) Petunia leaves
Answer» Which one of the following can be used as an acid-base indicator by a visually impaired student? (a) Litmus (b) Turmeric (c) Vanilla essence (d) Petunia leaves

Discussion

7.	Which of the following pairs are not isomers ?
Answer» Which of the following pairs are not isomers ?

Discussion

8.	All formulas of VECTORS
Answer» All formulas of VECTORS

Discussion

9.	Mendeleev ′ predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. Classify these elements as metals, non-metals or metalloids
Answer» Mendeleev ′ predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. Classify these elements as metals, non-metals or metalloids

Discussion

10.	What do you mean by corrosion?
Answer» What do you mean by corrosion?

Discussion

11.	Compare the rate of reaction of isotopes of hydrogen ??
Answer» Compare the rate of reaction of isotopes of hydrogen ??

Discussion

12.	Two samples of CH3COOH each of 10 g were taken separately in two vessels containing water of6 litre and 12 litre respectively at 27^° C. The degree of dissociation of CH3COOH will be
Answer» Two samples of CH3COOH each of 10 g were taken separately in two vessels containing water of6 litre and 12 litre respectively at 27^° C. The degree of dissociation of CH3COOH will be

Discussion

13.	(a) What is the electronic configuration of (i) a sodium atom, and (ii) an oxygen atom? (b) What is the number of outermost electrons in (i) a sodium atom, and (ii) an oxygen atom? (c) show the formation of Na_2O by the transfer of electrons between the combining atoms. (d) Why are ionic compounds usually hard? (e) How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molten state?
Answer» (a) What is the electronic configuration of (i) a sodium atom, and (ii) an oxygen atom? (b) What is the number of outermost electrons in (i) a sodium atom, and (ii) an oxygen atom? (c) show the formation of Na_2O by the transfer of electrons between the combining atoms. (d) Why are ionic compounds usually hard? (e) How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molten state?

Discussion

14.	Volume of 1 litre of water at stp
Answer» Volume of 1 litre of water at stp

Discussion

15.	4 why the alkaline earth metal oxide form sparingly soluble hydroxides on reaction with water
Answer» 4 why the alkaline earth metal oxide form sparingly soluble hydroxides on reaction with water

Discussion

16.	what is ph value
Answer» what is ph value

Discussion

17.	16. Ph-CH2-CH=CH2 +HBr------> X What is X ?
Answer» 16. Ph-CH2-CH=CH2 +HBr------> X What is X ?

Discussion

18.	45.Formula for Enthalphy of ionisation for weak acid and weak base. State whether this process is exothermic or endothermic
Answer» 45.Formula for Enthalphy of ionisation for weak acid and weak base. State whether this process is exothermic or endothermic

Discussion

19.	the number of electron in an atom with atomic number 105 having (n+l) =8 are : a. 30 b. 17 c. 15 d. unpredictab
Answer» the number of electron in an atom with atomic number 105 having (n+l) =8 are : a. 30 b. 17 c. 15 d. unpredictab

Discussion

20.	Do a litmus paper burn on putting in a concentrated or dilluted acid?
Answer» Do a litmus paper burn on putting in a concentrated or dilluted acid?

Discussion

21.	In what ratio does sulphur and oxygen need to be added in order to increase the yield of SO2 in the contact process?
Answer» In what ratio does sulphur and oxygen need to be added in order to increase the yield of SO₂ in the contact process?

Discussion

22.	The addition of dilute Hydrochloric Acid to a solution containing the Anion Q and the subsequent use of limewater can be used to identify the Anion Q. What is Q?
Answer» The addition of dilute Hydrochloric Acid to a solution containing the Anion Q and the subsequent use of limewater can be used to identify the Anion Q. What is Q?

Discussion

23.	MgO reacts with water to form
Answer» $MgO$ reacts with water to form

Discussion

24.	An amine on reaction with benzenesulphonyl chloride produces a compound insoluble in alkaline solution. This amine can be prepared by ammonolysis of ethyl chloride. The correct structure of amine is:
Answer» An amine on reaction with benzenesulphonyl chloride produces a compound insoluble in alkaline solution. This amine can be prepared by ammonolysis of ethyl chloride. The correct structure of amine is:

Discussion

25.	Mn + HNO3 → Mn(NO3)2 + ___
Answer» Mn + HNO₃ → Mn(NO₃)₂ + ___

Discussion

26.	Give an example to illustrate that metallic oxides are generally basic in nature.
Answer» Give an example to illustrate that metallic oxides are generally basic in nature.

Discussion

27.	How to find acidity or basisity?
Answer» How to find acidity or basisity?

Discussion

28.	number of moles of NH3 formed when 2 moles of N2 reacts with 6 moles of H2 is
Answer» number of moles of NH3 formed when 2 moles of N2 reacts with 6 moles of H2 is

Discussion

29.	WHY IS GRAVITATIONAL FORCE THE WEAKEST FORCE IN NATURE ??
Answer» WHY IS GRAVITATIONAL FORCE THE WEAKEST FORCE IN NATURE ??

Discussion

30.	0.1M acetic acid shows an osmotic pressure of 2.4846 atm.What is the pH level of the solution?Given temperature for the following condition is 27^°
Answer» 0.1M acetic acid shows an osmotic pressure of 2.4846 atm.What is the pH level of the solution?Given temperature for the following condition is 27^°

Discussion

31.	2.7 g aluminium was made to react with 11.2l O2 then how many moles of oxygen is unreacted
Answer» 2.7 g aluminium was made to react with 11.2l O2 then how many moles of oxygen is unreacted

Discussion

32.	Number of spectral lines in balmer series when an electron return from 7th orbit to 1st orbit of hydrogen atom are
Answer» Number of spectral lines in balmer series when an electron return from 7th orbit to 1st orbit of hydrogen atom are

Discussion

33.	The substances which have very low ignition temperature and can easily catch fire with a flame are calledsubstances.
Answer» The substances which have very low ignition temperature and can easily catch fire with a flame are calledsubstances.

Discussion

34.	30 ml of 0.5 M H2SO4 and 150 ml of 0.2 N HCl are mixed. The volume of 0.5 N NaOH required to neutralize the mixture completely is _____A) 120 mlB) 160 mlC) 80 mlD) 200 ml
Answer» 30 ml of 0.5 M H2SO4 and 150 ml of 0.2 N HCl are mixed. The volume of 0.5 N NaOH required to neutralize the mixture completely is _____ A) 120 ml B) 160 ml C) 80 ml D) 200 ml

Discussion

35.	How to determine wheatear the compound is polar or non polar covalent
Answer» How to determine wheatear the compound is polar or non polar covalent

Discussion

36.	The number of moles of H202 required to completely react with 400 ml of 0.5 N KMnO4 inacidic medium are
Answer» The number of moles of H202 required to completely react with 400 ml of 0.5 N KMnO4 inacidic medium are

Discussion

37.	4. Balance in basic medium P4⟶PH3+H2PO2−
Answer» 4. Balance in basic medium $P_{4} ⟶ P H_{3} + H_{2} P O^{2 -}$

Discussion

38.	27.1 L of hellium gas at 27 degree c and at a pressure twice the atmospheric pressure is so heated that both the volume and pressure of the gas are doubled.Find the final temperature of the gas.
Answer» 27.1 L of hellium gas at 27 degree c and at a pressure twice the atmospheric pressure is so heated that both the volume and pressure of the gas are doubled.Find the final temperature of the gas.

Discussion

39.	Name the chemical which is used as a preservative in pickles and curing fish.
Answer» Name the chemical which is used as a preservative in pickles and curing fish.

Discussion

40.	Which of the following methods cannot be used to prevent corrosion of iron?
Answer» Which of the following methods cannot be used to prevent corrosion of iron?

Discussion

41.	what is the formula for reynolds number?
Answer» what is the formula for reynolds number?

Discussion

42.	Question 8 (iv)Fill in the blanks.(d) Electroplating of ___ is done on objects like water taps and cycle bell to give them a shiny appearance.
Answer» Question 8 (iv) Fill in the blanks. (d) Electroplating of ___ is done on objects like water taps and cycle bell to give them a shiny appearance.

Discussion

43.	how stability of carbocation can be affected in presence of oxygen
Answer» how stability of carbocation can be affected in presence of oxygen

Discussion

44.	What happens when hydrogen chloride reacts with atmospheric water vapour?
Answer» What happens when hydrogen chloride reacts with atmospheric water vapour?

Discussion

45.	Why are Sulphide ores converted to oxide before reduction?
Answer» Why are Sulphide ores converted to oxide before reduction?

Discussion

46.	explain: for energy of the orbitals in same subshell, which is correct? E_{2s}(H)>E_{2s}(Li)>E_{2s}(Na)>E_{2s}(K) ?
Answer» explain: for energy of the orbitals in same subshell, which is correct? E_{2s}(H)>E_{2s}(Li)>E_{2s}(Na)>E_{2s}(K) ?

Discussion

47.	The IUPAC name of the given compound is
Answer» The IUPAC name of the given compound is

47.

The IUPAC name of the given compound is

Answer»

The IUPAC name of the given compound is

Discussion

48.	What happens when aluminium reacts with boiling dil. KOH?
Answer» What happens when aluminium reacts with boiling dil. KOH?

Discussion

49.	if the atomic mass of oxygen were taken as 100, then molar mass of water would b
Answer» if the atomic mass of oxygen were taken as 100, then molar mass of water would b

Discussion

50.	What is the use of dry 'ether' in Wurtz reaction and 'acetone' in Finkelstein reaction?
Answer» What is the use of dry 'ether' in Wurtz reaction and 'acetone' in Finkelstein reaction?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Explain the principle used to refine petroleum.

99 The hydrolysis constant for OCl is 3.0 107 then dissociation constant (Ka ) for HOCl is :- (1) 3.33 109 (2) 3.33 107 (3) 3.33 108 (4) 3.33 106

How acid or base increases the conductivity of pure water? Explain the process clearly.

30. If 2.24 L of co2 reacts with KOH and forms KHCO3, KHCO3 then reacts with H2SO4 forms K2SO4.Find wt of KHCO3 if reaction is KOH+CO2 =KHCO3

Which one of the following can be used as an acid-base indicator by a visually impaired student?(a) Litmus(b) Turmeric(c) Vanilla essence(d) Petunia leaves

Which of the following pairs are not isomers ?

All formulas of VECTORS

Mendeleev ′ predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. Classify these elements as metals, non-metals or metalloids

What do you mean by corrosion?

Compare the rate of reaction of isotopes of hydrogen ??

Two samples of CH3COOH each of 10 g were taken separately in two vessels containing water of6 litre and 12 litre respectively at 27^° C. The degree of dissociation of CH3COOH will be

Volume of 1 litre of water at stp

4 why the alkaline earth metal oxide form sparingly soluble hydroxides on reaction with water

what is ph value

16. Ph-CH2-CH=CH2 +HBr------> X What is X ?

45.Formula for Enthalphy of ionisation for weak acid and weak base. State whether this process is exothermic or endothermic

the number of electron in an atom with atomic number 105 having (n+l) =8 are : a. 30 b. 17 c. 15 d. unpredictab

Do a litmus paper burn on putting in a concentrated or dilluted acid?

In what ratio does sulphur and oxygen need to be added in order to increase the yield of SO2 in the contact process?

The addition of dilute Hydrochloric Acid to a solution containing the Anion Q and the subsequent use of limewater can be used to identify the Anion Q. What is Q?

MgO reacts with water to form

An amine on reaction with benzenesulphonyl chloride produces a compound insoluble in alkaline solution. This amine can be prepared by ammonolysis of ethyl chloride. The correct structure of amine is:

Mn + HNO3 → Mn(NO3)2 + ___

Give an example to illustrate that metallic oxides are generally basic in nature.

How to find acidity or basisity?

number of moles of NH3 formed when 2 moles of N2 reacts with 6 moles of H2 is

WHY IS GRAVITATIONAL FORCE THE WEAKEST FORCE IN NATURE ??

0.1M acetic acid shows an osmotic pressure of 2.4846 atm.What is the pH level of the solution?Given temperature for the following condition is 27^°

2.7 g aluminium was made to react with 11.2l O2 then how many moles of oxygen is unreacted

Number of spectral lines in balmer series when an electron return from 7th orbit to 1st orbit of hydrogen atom are

The substances which have very low ignition temperature and can easily catch fire with a flame are calledsubstances.

30 ml of 0.5 M H2SO4 and 150 ml of 0.2 N HCl are mixed. The volume of 0.5 N NaOH required to neutralize the mixture completely is _____A) 120 mlB) 160 mlC) 80 mlD) 200 ml

How to determine wheatear the compound is polar or non polar covalent

The number of moles of H202 required to completely react with 400 ml of 0.5 N KMnO4 inacidic medium are

4. Balance in basic medium P4⟶PH3+H2PO2−

27.1 L of hellium gas at 27 degree c and at a pressure twice the atmospheric pressure is so heated that both the volume and pressure of the gas are doubled.Find the final temperature of the gas.

Name the chemical which is used as a preservative in pickles and curing fish.

Which of the following methods cannot be used to prevent corrosion of iron?

what is the formula for reynolds number?

Question 8 (iv)Fill in the blanks.(d) Electroplating of ___ is done on objects like water taps and cycle bell to give them a shiny appearance.

how stability of carbocation can be affected in presence of oxygen

What happens when hydrogen chloride reacts with atmospheric water vapour?

Why are Sulphide ores converted to oxide before reduction?

explain: for energy of the orbitals in same subshell, which is correct? E_{2s}(H)>E_{2s}(Li)>E_{2s}(Na)>E_{2s}(K) ?

The IUPAC name of the given compound is

What happens when aluminium reacts with boiling dil. KOH?

if the atomic mass of oxygen were taken as 100, then molar mass of water would b

What is the use of dry 'ether' in Wurtz reaction and 'acetone' in Finkelstein reaction?