46295 + Interview Questions in Chemistry

1.	28. Maximum possible numbers of two and three dimensional lattices are respectively 1) 5 and 14 2) 7 and 14 3) 14 and 4 4) 5 and 13
Answer» 28. Maximum possible numbers of two and three dimensional lattices are respectively 1) 5 and 14 2) 7 and 14 3) 14 and 4 4) 5 and 13

Discussion

2.	What should be the reported sum of 7.238,4.12,1.051
Answer» What should be the reported sum of 7.238,4.12,1.051

Discussion

3.	The difference of number of water molecules in gypsum and plaster of paris is
Answer» The difference of number of water molecules in gypsum and plaster of paris is

Discussion

4.	5. Principal product of CH2=CH(CH2)8COOH + HBr ---->
Answer» 5. Principal product of CH2=CH(CH2)8COOH + HBr ---->

Discussion

5.	Identify the product obtained in the following reactionCH3CH2-CO-CH2CH2CH3 + acidified KMnO4 heat give products(1)CH3COOH (2)CH3CH2CH2COOH(3)CH3CH2COOH(4) all of thes
Answer» Identify the product obtained in the following reactionCH3CH2-CO-CH2CH2CH3 + acidified KMnO4 heat give products(1)CH3COOH (2)CH3CH2CH2COOH(3)CH3CH2COOH(4) all of thes

Discussion

6.	The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon, is
Answer» The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon, is

Discussion

7.	61. 7.38 gram of a sample of metal oxide is quantitatively reduced to 6.84 gram of pure metal. If the specific heat of metal is 0.0332 cal/g^° C. Calculate the valency of the metal.
Answer» 61. 7.38 gram of a sample of metal oxide is quantitatively reduced to 6.84 gram of pure metal. If the specific heat of metal is 0.0332 cal/g^° C. Calculate the valency of the metal.

Discussion

8.	The first and second ionisation enthalpies of anelement are 520 and 7300 kJ/mol respectively. Theelement is likely to be(1) A reactive non-metal(2) A noble gas(3) A reactive monovalent metal4) A non-reactive metal
Answer» The first and second ionisation enthalpies of anelement are 520 and 7300 kJ/mol respectively. Theelement is likely to be(1) A reactive non-metal(2) A noble gas(3) A reactive monovalent metal4) A non-reactive metal

Discussion

9.	A mixture of chloroxylenol and terpineol acts as
Answer» A mixture of chloroxylenol and terpineol acts as

Discussion

10.	19. Which of the following has the maximum number of unpaired electrons? 1. Mg2+ 2. Ti3 3. Fe3 4.mn2
Answer» 19. Which of the following has the maximum number of unpaired electrons? 1. Mg2+ 2. Ti3 3. Fe3 4.mn2

Discussion

11.	A reaction, A + B → C + D + q is found to have a positive entropy change. The reaction will be (i) possible at high temperature (ii) possible only at low temperature (iii) not possible at any temperature (iv) possible at any temperature
Answer» A reaction, A + B $\to$ C + D + q is found to have a positive entropy change. The reaction will be (i) possible at high temperature (ii) possible only at low temperature (iii) not possible at any temperature (iv) possible at any temperature

Discussion

12.	Why for increasing n , the energy difference between the two adjacent levels of atom decreases.
Answer» Why for increasing n , the energy difference between the two adjacent levels of atom decreases.

Discussion

13.	Calciumcarbonate reacts with aqueous HCl to give CaCl2 and CO2according to the reaction, CaCO3(s)+ 2 HCl(aq) →CaCl2(aq) + CO2(g)+ H2O(l)What massof CaCO3 is required to react completely with 25 mL of0.75 M HCl?
Answer» Calcium carbonate reacts with aqueous HCl to give CaCl₂ and CO₂ according to the reaction, CaCO₃₍_s₎ + 2 HCl₍_aq₎ → CaCl₂₍_aq₎ + CO₂₍_g) + H₂O₍_l₎ What mass of CaCO₃ is required to react completely with 25 mL of 0.75 M HCl?

13.

Calciumcarbonate reacts with aqueous HCl to give CaCl2 and CO2according to the reaction, CaCO3(s)+ 2 HCl(aq) →CaCl2(aq) + CO2(g)+ H2O(l)What massof CaCO3 is required to react completely with 25 mL of0.75 M HCl?

Answer»

Calcium
carbonate reacts with aqueous HCl to give CaCl₂ and CO₂
according to the reaction, CaCO₃₍_s₎
+ 2 HCl₍_aq₎ →
CaCl₂₍_aq₎ + CO₂₍_g)
+ H₂O₍_l₎

What mass
of CaCO₃ is required to react completely with 25 mL of
0.75 M HCl?

Discussion

14.	The energy of an electron in the nth orbit of hydrogen atom is given by En = -(13.6/n^2)eV. Find energy required to take the electron from the ground state to the (i) first excited state , (ii) second excited state.
Answer» The energy of an electron in the nth orbit of hydrogen atom is given by En = -(13.6/n^2)eV. Find energy required to take the electron from the ground state to the (i) first excited state , (ii) second excited state.

Discussion

15.	Calculate the solubility of a sparingly soluble salt, BaSO4 in 0.01 M Na2SO4 solution ?(Ksp for BaSO4=1.1×10−10)
Answer» Calculate the solubility of a sparingly soluble salt, $B a S O_{4}$ in $0.01 M$ $N a_{2} S O_{4}$ solution ? $(K_{s p}$ for $B a S O_{4} = 1.1 \times 10^{- 10})$

Discussion

16.	2. Ethylidene chloride react with aq.KOH to form which of the compound?
Answer» 2. Ethylidene chloride react with aq.KOH to form which of the compound?

Discussion

17.	Why is it that in the combustion of saturated hydrocarbons, a blue coloured flame is seen and in the combustion of unsaturated hydrocarbons a yellow coloured flame with lots of black smoke is observed ?
Answer» Why is it that in the combustion of saturated hydrocarbons, a blue coloured flame is seen and in the combustion of unsaturated hydrocarbons a yellow coloured flame with lots of black smoke is observed ?

Discussion

18.	Identify A in the given reaction.
Answer» Identify A in the given reaction.

Discussion

19.	raoults law correct definition
Answer» raoults law correct definition

Discussion

20.	41. Al3+ replaces Na+ ions at edge centres of NaCl structure.Calculate vacancies in 1mole NaCl.
Answer» 41. Al3+ replaces Na+ ions at edge centres of NaCl structure.Calculate vacancies in 1mole NaCl.

Discussion

21.	The ratio of the radii of the 2nd Bohr orbit of hydrogen atom to 3rd Bohr orbits of Li2+ is:
Answer» The ratio of the radii of the $2^{n d}$ Bohr orbit of hydrogen atom to $3^{r d}$ Bohr orbits of $L i^{2 +}$ is:

Discussion

22.	Which one of the following ions has an electronic configuration of [Ar]3d10 ?
Answer» Which one of the following ions has an electronic configuration of $[A r] 3 d^{10}$ ?

Discussion

23.	In which complex is the C−O bond length maximum?
Answer» In which complex is the $C - O$ bond length maximum?

Discussion

24.	Which of the following does not give oxygen on heating?
Answer» Which of the following does not give oxygen on heating?

Discussion

25.	Structure of 2 methylpropanoic acid?
Answer» Structure of 2 methylpropanoic acid?

Discussion

26.	Calculate the freezing point of 1molar aqueous solution of kcl
Answer» Calculate the freezing point of 1molar aqueous solution of kcl

Discussion

27.	how to draw the molecular orbital diagram for O_2^2
Answer» how to draw the molecular orbital diagram for O_2^2

Discussion

28.	For the SN1 solvolysis of 5-bromopent-2-ene in ethanol, which of the following is true?
Answer» For the $S_{N} 1$ solvolysis of 5-bromopent-2-ene in ethanol, which of the following is true?

Discussion

29.	What are important electron withdrawing groups and electron donating groups should be remembered for NEET examination point of view..?
Answer» What are important electron withdrawing groups and electron donating groups should be remembered for NEET examination point of view..?

Discussion

30.	During the expansion of an ideal gas, the work done by the gas is 100 J and the heat capacity of the process is found to be +2 J/oC. Find △U of the gas if the final temperature of the gas is 25oC higher than its initial temperature.
Answer» During the expansion of an ideal gas, the work done by the gas is $100 J$ and the heat capacity of the process is found to be $+ 2 J /^{o} C$ . Find $△ U$ of the gas if the final temperature of the gas is $25^{o} C$ higher than its initial temperature.

Discussion

31.	Why are gaseous fuels called 'clean fuels'? Give some examples of gaseous fuels.
Answer» Why are gaseous fuels called 'clean fuels'? Give some examples of gaseous fuels.

Discussion

32.	52 What will be the volume of O gas at STP which is obtained by thermal decomposition of 30.62 g KClO , with 80% purity :- (1) 3.36 L (2) 6.72 L (3) 10.11 L (4) 1.68 L
Answer» 52 What will be the volume of O gas at STP which is obtained by thermal decomposition of 30.62 g KClO , with 80% purity :- (1) 3.36 L (2) 6.72 L (3) 10.11 L (4) 1.68 L

Discussion

33.	The ene-yne that produces a chiral compound upon treatment with Lindlar's catalyst is:
Answer» The ene-yne that produces a chiral compound upon treatment with Lindlar's catalyst is:

Discussion

34.	In the extraction of aluminium, the function of cryolite is to:
Answer» In the extraction of aluminium, the function of cryolite is to:

Discussion

35.	v_olume of CO_2 obtained at STP by the complete decomposition of 9.85gm BaCO_3 i
Answer» v_olume of CO_2 obtained at STP by the complete decomposition of 9.85gm BaCO_3 i

Discussion

36.	50. A glass tube containing some excited H atom was allowed to relax to grind state and the emitted light was thrown on another glass tube containing some excited He+ ion where the electron in He+ ion was excited further higher level. At the end all the excited He+ ion was allowed to relaxed to ground state and the most energetic photon was found to have energy = 52.88 eV . Determine the orbit no. in which electron was present initially in H atom and He+ ion .
Answer» 50. A glass tube containing some excited H atom was allowed to relax to grind state and the emitted light was thrown on another glass tube containing some excited He+ ion where the electron in He+ ion was excited further higher level. At the end all the excited He+ ion was allowed to relaxed to ground state and the most energetic photon was found to have energy = 52.88 eV . Determine the orbit no. in which electron was present initially in H atom and He+ ion .

Discussion

37.	Which of the following is an example of a postive Inductive effect group?
Answer» Which of the following is an example of a postive Inductive effect group?

Discussion

38.	Why in nitration reaction p nitro haloarene dominates o nitro haloarene
Answer» Why in nitration reaction p nitro haloarene dominates o nitro haloarene

Discussion

39.	2moles of a diatomic gas are enclosed in a cylinder piston arrangementv.the area of cross section and mass ofvpiston are 1cm^2 and 1kg respectively. A heater is supplying heat to the gas very slowlyv.find the heat supplied (in joule)by the heater if piston moves through a dis†an ce of 10cm?
Answer» 2moles of a diatomic gas are enclosed in a cylinder piston arrangementv.the area of cross section and mass ofvpiston are 1cm^2 and 1kg respectively. A heater is supplying heat to the gas very slowlyv.find the heat supplied (in joule)by the heater if piston moves through a dis†an ce of 10cm?

Discussion

40.	Partial pressure of water in air at a particular day is 8 torr at 14∘C , Calculate the percentage relative humidityGiven: Vapour pressure of water at 14∘C is 12 torr
Answer» Partial pressure of water in air at a particular day is $8 t o r r$ at $14^{\circ} C$ , Calculate the percentage relative humidity Given: Vapour pressure of water at $14^{\circ} C$ is $12 t o r r$

Discussion

41.	What are the steps done for naming a carbon compound
Answer» What are the steps done for naming a carbon compound

Discussion

42.	What was the true quote of Einstein about gravity?
Answer» What was the true quote of Einstein about gravity?

Discussion

43.	haemoglobin contains 0.33% of iron by weight. molecular weight of haemoglobin is approximately 67200. how many iron atoms are present in 1 molecule of haemoglobin?
Answer» haemoglobin contains 0.33% of iron by weight. molecular weight of haemoglobin is approximately 67200. how many iron atoms are present in 1 molecule of haemoglobin?

Discussion

44.	The oxidative cleavage of 1,2-diol by a periodic acid or periodic salt to give corresponding carbonyls is known as Malaprade oxidation. Vicinal diols can also be oxidized to form aldehydes and ketones by lead tetraacetate. This oxidative cleavage is analogous to malaprade oxidation and is known as Criegee oxidation. When Halohydrin is treated with Ag2O or Silver salt, it gives pinacol-pinacolone type rearrangement called semi-pinacol rearrangement. List-I contains reactions and List-II contains products that can be formed. Which of the following options has the correct combination considering reaction in List-I and their product(s) in List-II?
Answer» The oxidative cleavage of 1,2-diol by a periodic acid or periodic salt to give corresponding carbonyls is known as Malaprade oxidation. Vicinal diols can also be oxidized to form aldehydes and ketones by lead tetraacetate. This oxidative cleavage is analogous to malaprade oxidation and is known as Criegee oxidation. When Halohydrin is treated with $A g_{2} O$ or Silver salt, it gives pinacol-pinacolone type rearrangement called semi-pinacol rearrangement. List-I contains reactions and List-II contains products that can be formed. Which of the following options has the correct combination considering reaction in List-I and their product(s) in List-II?

Discussion

45.	A sample of ammonium phosphate (NH4)3PO4 contains 3.18 mol of hydrogen atoms. The number of moles of oxygen atoms in the sample is:
Answer» A sample of ammonium phosphate $(N H_{4})_{3} P O_{4}$ contains $3.18 m o l$ of hydrogen atoms. The number of moles of oxygen atoms in the sample is:

Discussion

46.	An organic acid (A) reacts with concentrated H2SO4 to give two neutral oxides (B),(C) and a acidic oxide (D). The compound (A) is:
Answer» An organic acid $(A)$ reacts with concentrated $H_{2} S O_{4}$ to give two neutral oxides $(B), (C)$ and a acidic oxide $(D) .$ The compound $(A)$ is:

Discussion

47.	The number of significant figures in the sum of 13.21,8.0 and 2.222 are(a) 5(b) 4(c) 3(d) 2.
Answer» The number of significant figures in the sum of 13.21,8.0 and 2.222 are(a) 5(b) 4(c) 3(d) 2.

Discussion

48.	The orbital angular momentum of an electron in 2s orbital is:
Answer» The orbital angular momentum of an electron in 2s orbital is:

Discussion

49.	What is the correct order of electronegativity?
Answer» What is the correct order of electronegativity?

Discussion

50.	The oganic reaction which proceeds through heterolytic bond cleavage are known as:
Answer» The oganic reaction which proceeds through heterolytic bond cleavage are known as:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

28. Maximum possible numbers of two and three dimensional lattices are respectively 1) 5 and 14 2) 7 and 14 3) 14 and 4 4) 5 and 13

What should be the reported sum of 7.238,4.12,1.051

The difference of number of water molecules in gypsum and plaster of paris is

5. Principal product of CH2=CH(CH2)8COOH + HBr ---->

Identify the product obtained in the following reactionCH3CH2-CO-CH2CH2CH3 + acidified KMnO4 heat give products(1)CH3COOH (2)CH3CH2CH2COOH(3)CH3CH2COOH(4) all of thes

The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon, is

61. 7.38 gram of a sample of metal oxide is quantitatively reduced to 6.84 gram of pure metal. If the specific heat of metal is 0.0332 cal/g^° C. Calculate the valency of the metal.

The first and second ionisation enthalpies of anelement are 520 and 7300 kJ/mol respectively. Theelement is likely to be(1) A reactive non-metal(2) A noble gas(3) A reactive monovalent metal4) A non-reactive metal

A mixture of chloroxylenol and terpineol acts as

19. Which of the following has the maximum number of unpaired electrons? 1. Mg2+ 2. Ti3 3. Fe3 4.mn2

A reaction, A + B → C + D + q is found to have a positive entropy change. The reaction will be (i) possible at high temperature (ii) possible only at low temperature (iii) not possible at any temperature (iv) possible at any temperature

Why for increasing n , the energy difference between the two adjacent levels of atom decreases.

Calciumcarbonate reacts with aqueous HCl to give CaCl2 and CO2according to the reaction, CaCO3(s)+ 2 HCl(aq) →CaCl2(aq) + CO2(g)+ H2O(l)What massof CaCO3 is required to react completely with 25 mL of0.75 M HCl?

The energy of an electron in the nth orbit of hydrogen atom is given by En = -(13.6/n^2)eV. Find energy required to take the electron from the ground state to the (i) first excited state , (ii) second excited state.

Calculate the solubility of a sparingly soluble salt, BaSO4 in 0.01 M Na2SO4 solution ?(Ksp for BaSO4=1.1×10−10)

2. Ethylidene chloride react with aq.KOH to form which of the compound?

Why is it that in the combustion of saturated hydrocarbons, a blue coloured flame is seen and in the combustion of unsaturated hydrocarbons a yellow coloured flame with lots of black smoke is observed ?

Identify A in the given reaction.

raoults law correct definition

41. Al3+ replaces Na+ ions at edge centres of NaCl structure.Calculate vacancies in 1mole NaCl.

The ratio of the radii of the 2nd Bohr orbit of hydrogen atom to 3rd Bohr orbits of Li2+ is:

Which one of the following ions has an electronic configuration of [Ar]3d10 ?

In which complex is the C−O bond length maximum?

Which of the following does not give oxygen on heating?

Structure of 2 methylpropanoic acid?

Calculate the freezing point of 1molar aqueous solution of kcl

how to draw the molecular orbital diagram for O_2^2

For the SN1 solvolysis of 5-bromopent-2-ene in ethanol, which of the following is true?

What are important electron withdrawing groups and electron donating groups should be remembered for NEET examination point of view..?

During the expansion of an ideal gas, the work done by the gas is 100 J and the heat capacity of the process is found to be +2 J/oC. Find △U of the gas if the final temperature of the gas is 25oC higher than its initial temperature.

Why are gaseous fuels called 'clean fuels'? Give some examples of gaseous fuels.

52 What will be the volume of O gas at STP which is obtained by thermal decomposition of 30.62 g KClO , with 80% purity :- (1) 3.36 L (2) 6.72 L (3) 10.11 L (4) 1.68 L

The ene-yne that produces a chiral compound upon treatment with Lindlar's catalyst is:

In the extraction of aluminium, the function of cryolite is to:

v_olume of CO_2 obtained at STP by the complete decomposition of 9.85gm BaCO_3 i

Which of the following is an example of a postive Inductive effect group?

Why in nitration reaction p nitro haloarene dominates o nitro haloarene

2moles of a diatomic gas are enclosed in a cylinder piston arrangementv.the area of cross section and mass ofvpiston are 1cm^2 and 1kg respectively. A heater is supplying heat to the gas very slowlyv.find the heat supplied (in joule)by the heater if piston moves through a dis†an ce of 10cm?

Partial pressure of water in air at a particular day is 8 torr at 14∘C , Calculate the percentage relative humidityGiven: Vapour pressure of water at 14∘C is 12 torr

What are the steps done for naming a carbon compound

What was the true quote of Einstein about gravity?

haemoglobin contains 0.33% of iron by weight. molecular weight of haemoglobin is approximately 67200. how many iron atoms are present in 1 molecule of haemoglobin?

A sample of ammonium phosphate (NH4)3PO4 contains 3.18 mol of hydrogen atoms. The number of moles of oxygen atoms in the sample is:

An organic acid (A) reacts with concentrated H2SO4 to give two neutral oxides (B),(C) and a acidic oxide (D). The compound (A) is:

The number of significant figures in the sum of 13.21,8.0 and 2.222 are(a) 5(b) 4(c) 3(d) 2.

The orbital angular momentum of an electron in 2s orbital is:

What is the correct order of electronegativity?

The oganic reaction which proceeds through heterolytic bond cleavage are known as: