46295 + Interview Questions in Chemistry

1.	In a reverse Brayton cycle working at a pressure ratio of 5, the temperatures at the inlet of compressor and expander are 10∘C and 25∘C respectively. If the compression and expansion takes place according to the law pv1.2 = constant, the COP of the plant is _____.Use Cp=1.005kJ/kgK and R = 0.287 kJ/kgK.1.899
Answer» In a reverse Brayton cycle working at a pressure ratio of 5, the temperatures at the inlet of compressor and expander are $10^{\circ} C$ and $25^{\circ} C$ respectively. If the compression and expansion takes place according to the law $p v^{1.2}$ = constant, the COP of the plant is _____. Use $C_{p} = 1.005 k J / k g K$ and R = 0.287 kJ/kgK. 1.899

1.

In a reverse Brayton cycle working at a pressure ratio of 5, the temperatures at the inlet of compressor and expander are 10∘C and 25∘C respectively. If the compression and expansion takes place according to the law pv1.2 = constant, the COP of the plant is _____.Use Cp=1.005kJ/kgK and R = 0.287 kJ/kgK.1.899

Answer»

In a reverse Brayton cycle working at a pressure ratio of 5, the temperatures at the inlet of compressor and expander are $10^{\circ} C$ and $25^{\circ} C$ respectively. If the compression and expansion takes place according to the law $p v^{1.2}$ = constant, the COP of the plant is _____.

Use $C_{p} = 1.005 k J / k g K$ and R = 0.287 kJ/kgK.

1.899

2.	two flasks of equal volumes have been joined by a narrow tube of negligible volume.Initially both flasks are at 300k containing 0.60 mol of O2 gas at 0.5 atm pressure.One of the flask is then placed in a thermostat at 600k.Claculate number of moles of O2gas in each flask
Answer» two flasks of equal volumes have been joined by a narrow tube of negligible volume.Initially both flasks are at 300k containing 0.60 mol of O2 gas at 0.5 atm pressure.One of the flask is then placed in a thermostat at 600k.Claculate number of moles of O2gas in each flask

3.	Numbers of isomers of C(3)H(6)O(3)
Answer» Numbers of isomers of C(3)H(6)O(3)

4.	Which one of the following has the highest bond energy?
Answer» Which one of the following has the highest bond energy?

6.	Why water h^° as highest density at 4^° Celsius . If we decrease the temperature to 2^° Celsius, then the less kinetic energy whould be owned by water molecules hencw more densit
Answer» Why water h^° as highest density at 4^° Celsius . If we decrease the temperature to 2^° Celsius, then the less kinetic energy whould be owned by water molecules hencw more densit

7.	Calculate work involve in compression of 2 moles of H2 gas reversible and isothermally from 1.2l to 0.6l at 300k, if critical volume of H2 gas is 0.3 l/mo
Answer» Calculate work involve in compression of 2 moles of H2 gas reversible and isothermally from 1.2l to 0.6l at 300k, if critical volume of H2 gas is 0.3 l/mo

8.	Are all gaseous reaction first order
Answer» Are all gaseous reaction first order

9.	The numbers 2.735 and 2.785 on rounding off to 3 significant figures will be respectively
Answer» The numbers 2.735 and 2.785 on rounding off to 3 significant figures will be respectively

10.	A : One mole of an ideal gas at STP has volume 22.4 m3.R : If symbols have usual meanings then equation of ideal gas is PT = VR.Options:If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)Wrong If Assertion is true statement but Reason is false, then mark (3)Should have chosen If both Assertion and Reason are false statements, then mark (4)
Answer» A : One mole of an ideal gas at STP has volume 22.4 m3. R : If symbols have usual meanings then equation of ideal gas is PT = VR. Options: If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1) If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2) Wrong If Assertion is true statement but Reason is false, then mark (3) Should have chosen If both Assertion and Reason are false statements, then mark (4)

11.	The splitting of degeneracy of d orbital due to ligands is known as
Answer» The splitting of degeneracy of d orbital due to ligands is known as

12.	Among the chalcogens, the one having the highest electron affinity is:
Answer» Among the chalcogens, the one having the highest electron affinity is:

13.	A 0.1 M solution of K4[Fe(CN)6] is 50% dissociated at 27∘C. What will be its observed osmotic pressure?
Answer» A $0.1 M$ solution of $K_{4} [F e (C N)_{6}]$ is $50 %$ dissociated at $27^{\circ} C$ . What will be its observed osmotic pressure?

14.	Q 1/1 The number of unit cells present in 100 g of a BCC crystal with density 5 g/cm3 and edge lengthequal to 100 pm is
Answer» Q 1/1 The number of unit cells present in 100 g of a BCC crystal with density 5 g/cm3 and edge lengthequal to 100 pm is

15.	896ml of a mixture of CO and CO2 weigh 1.28g at NTP . Calculate the volume of CO2 in the mixture at NTP
Answer» 896ml of a mixture of CO and CO2 weigh 1.28g at NTP . Calculate the volume of CO2 in the mixture at NTP

16.	What is the mass of the precipitate formed when50 mL of 16.9% (w/v) solution of AgNO3 is mixedwith 50 mL of 5.8% (w/v) NaCl solution?(Ag 107.8, N-14, O 16, Na 23, Cl 35.5)Re-AIPMT-2015\rbrack(1) 7g(3) 28 g(2) 14 g(4) 3.5 g
Answer» What is the mass of the precipitate formed when50 mL of 16.9% (w/v) solution of AgNO3 is mixedwith 50 mL of 5.8% (w/v) NaCl solution?(Ag 107.8, N-14, O 16, Na 23, Cl 35.5)Re-AIPMT-2015\rbrack(1) 7g(3) 28 g(2) 14 g(4) 3.5 g

17.	In a solution with positive deviation vapour pressure of solution is greater than vapour pressure of pure solvent. Explain.
Answer» In a solution with positive deviation vapour pressure of solution is greater than vapour pressure of pure solvent. Explain.

18.	HNO2+2H2SO3+H2O→NH2OH+2DThen ‘D′ is
Answer» $H N O_{2} + 2 H_{2} S O_{3} + H_{2} O \to N H_{2} O H + 2 D T h e n ‘ D^{'} i s$

19.	Write the free radicalmechanism for the polymerisation of ethene.
Answer» Write the free radical mechanism for the polymerisation of ethene.

20.	Why is electric current a scalar quatity ??
Answer» Why is electric current a scalar quatity ??

21.	In a circuit tester, LED bulb is used in place of a normal bulb because LED bulbs needs ______ electric current.
Answer» In a circuit tester, LED bulb is used in place of a normal bulb because LED bulbs needs ______ electric current.

22.	15 moles of H2 and 5.2 moles of I2 are mixed and then allowed too attain equilibrium at 500^°C .At equilibrium the concentration of HI its found to be 10 moles . The equilibrium constant for the formation of HI is ?
Answer» 15 moles of H2 and 5.2 moles of I2 are mixed and then allowed too attain equilibrium at 500^°C .At equilibrium the concentration of HI its found to be 10 moles . The equilibrium constant for the formation of HI is ?

23.	The wavelength associated with a golf ball weighing 100 g and moving at a speed of 40 m/hr is approximately of the order:
Answer» The wavelength associated with a golf ball weighing 100 g and moving at a speed of 40 m/hr is approximately of the order:

24.	A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. Name the non-metal.
Answer» A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. Name the non-metal.

25.	77 An element crystallises in bcc lattice.Then calculate the coordination numbers of nearest neighbours and next nearest neighbours of the element.
Answer» 77 An element crystallises in bcc lattice.Then calculate the coordination numbers of nearest neighbours and next nearest neighbours of the element.

26.	Conjugate acid of NH3 is:
Answer» Conjugate acid of $N H_{3}$ is:

Explore topic-wise InterviewSolutions in Current Affairs.

two flasks of equal volumes have been joined by a narrow tube of negligible volume.Initially both flasks are at 300k containing 0.60 mol of O2 gas at 0.5 atm pressure.One of the flask is then placed in a thermostat at 600k.Claculate number of moles of O2gas in each flask

Numbers of isomers of C(3)H(6)O(3)

Which one of the following has the highest bond energy?

Allyl isocyanide has [IIT 1995]

Why water h^° as highest density at 4^° Celsius . If we decrease the temperature to 2^° Celsius, then the less kinetic energy whould be owned by water molecules hencw more densit

Calculate work involve in compression of 2 moles of H2 gas reversible and isothermally from 1.2l to 0.6l at 300k, if critical volume of H2 gas is 0.3 l/mo

Are all gaseous reaction first order

The numbers 2.735 and 2.785 on rounding off to 3 significant figures will be respectively

The splitting of degeneracy of d orbital due to ligands is known as

Among the chalcogens, the one having the highest electron affinity is:

A 0.1 M solution of K4[Fe(CN)6] is 50% dissociated at 27∘C. What will be its observed osmotic pressure?

Q 1/1 The number of unit cells present in 100 g of a BCC crystal with density 5 g/cm3 and edge lengthequal to 100 pm is

896ml of a mixture of CO and CO2 weigh 1.28g at NTP . Calculate the volume of CO2 in the mixture at NTP

What is the mass of the precipitate formed when50 mL of 16.9% (w/v) solution of AgNO3 is mixedwith 50 mL of 5.8% (w/v) NaCl solution?(Ag 107.8, N-14, O 16, Na 23, Cl 35.5)Re-AIPMT-2015\rbrack(1) 7g(3) 28 g(2) 14 g(4) 3.5 g

In a solution with positive deviation vapour pressure of solution is greater than vapour pressure of pure solvent. Explain.

HNO2+2H2SO3+H2O→NH2OH+2DThen ‘D′ is

Write the free radicalmechanism for the polymerisation of ethene.

Why is electric current a scalar quatity ??

In a circuit tester, LED bulb is used in place of a normal bulb because LED bulbs needs ______ electric current.

15 moles of H2 and 5.2 moles of I2 are mixed and then allowed too attain equilibrium at 500^°C .At equilibrium the concentration of HI its found to be 10 moles . The equilibrium constant for the formation of HI is ?

The wavelength associated with a golf ball weighing 100 g and moving at a speed of 40 m/hr is approximately of the order:

A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. Name the non-metal.​

77 An element crystallises in bcc lattice.Then calculate the coordination numbers of nearest neighbours and next nearest neighbours of the element.

Conjugate acid of NH3 is:

Draw the structures of optical isomers of:(i) [Cr(C2O4)3]3−(ii) [PtCl2(en)2]2+(iii) [Cr(NH3)2Cl2(en)]+

If a glass rod is dipped in a solution of the same refractive index as that of glass then.. A rod disappears B rod appears to be bent C rod appears shorter D none

In a thermodynamic process, 50 J of heat is going out of the system and 10 J of work is done on the system. If the initial internal energy of the system was 60 J, then the final internal energy of the system will be

3. Half life period of a first order reaction is 10 minute, what % of the reaction will be completed in 100 minute : (1) 25 (2) 50 (3) 99.9 (4) 75

36. Cyclopropane +cl2/hv light--->A +KCN----->B +2H2o /H+------>C +heat ---->D. The compound A, B, C, D are =

Calculate the hydrolysis constant, of 0.25 M NaCN solution Ka(HCN)=4.8×10−10 M.

What is oxidising agent

Which of the following is/are possible product(s) of given reaction?

Give reactions to expalin the oxidizing action of hio4 with beta amino alcohols.

The intermediate formed when propene react with HCl in presence of peroxide is

What is the nature of fullerenes on thermal and electrical conductivity?

is magnetic properties only present in d block elements ? give reason cant we use the same formula to find the spin only magnetic moment of other elements in periodic table ?

why do the acid not show acidic behaviour in the absence of water?

Predict if the solutions of the following salts are neutral, acidic or basic: NaCl,KBr,NaCN,NH4NO3,NaNO2 and KF

Q 10/15 The number of atoms in 50 g of bcc crystal with density 5 g cm-3 and edge length 100 pm is 3 1024 4 x 1025 5 x 1024 2 x 1025

Which one is most reactive towards SN1 reaction?

The correct order of increasing basicity of the given conjugated bases is:

Discuss the nature of bonding in metal carbonyls.

A solution containing 8gm of a substance in 100gm of diethyl ether at 36.86 ^°centigrat where as pure ether boil it 36.60 ^°C determine the molecular mass of solute. ( Kb for ether 2.02 K Kg/mol

The final step for the extraction of copper from copper pyrite in Bessemere converter involves the reaction

Q. The partial pressure of ethane over a solution containing 6.56 × 10-3 g of ethane is 1 bar. If the solution contains 5.00 × 10-2 g of ethane, then what shall be the partial pressure of the gas?

When a nucleophile attacks a carbonyl compound, the one which is most reactive towards the nucleophile is:

Which of the following bond angle is not observed in PCl5 molecule in gaseous state?

A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. Name the non-metal.

28.	If a glass rod is dipped in a solution of the same refractive index as that of glass then.. A rod disappears B rod appears to be bent C rod appears shorter D none
Answer» If a glass rod is dipped in a solution of the same refractive index as that of glass then.. A rod disappears B rod appears to be bent C rod appears shorter D none

29.	In a thermodynamic process, 50 J of heat is going out of the system and 10 J of work is done on the system. If the initial internal energy of the system was 60 J, then the final internal energy of the system will be
Answer» In a thermodynamic process, $50 J$ of heat is going out of the system and $10 J$ of work is done on the system. If the initial internal energy of the system was $60 J$ , then the final internal energy of the system will be

30.	3. Half life period of a first order reaction is 10 minute, what % of the reaction will be completed in 100 minute : (1) 25 (2) 50 (3) 99.9 (4) 75
Answer» 3. Half life period of a first order reaction is 10 minute, what % of the reaction will be completed in 100 minute : (1) 25 (2) 50 (3) 99.9 (4) 75

32.	36. Cyclopropane +cl2/hv light--->A +KCN----->B +2H2o /H+------>C +heat ---->D. The compound A, B, C, D are =
Answer» 36. Cyclopropane +cl2/hv light--->A +KCN----->B +2H2o /H+------>C +heat ---->D. The compound A, B, C, D are =

33.	Calculate the hydrolysis constant, of 0.25 M NaCN solution Ka(HCN)=4.8×10−10 M.
Answer» Calculate the hydrolysis constant, of $0.25 M N a C N$ solution $K_{a} (H C N) = 4.8 \times 10^{- 10} M$ .

35.	Which of the following is/are possible product(s) of given reaction?
Answer» Which of the following is/are possible product(s) of given reaction?

36.	Give reactions to expalin the oxidizing action of hio4 with beta amino alcohols.
Answer» Give reactions to expalin the oxidizing action of hio4 with beta amino alcohols.

37.	The intermediate formed when propene react with HCl in presence of peroxide is
Answer» The intermediate formed when propene react with $H C l$ in presence of peroxide is

38.	What is the nature of fullerenes on thermal and electrical conductivity?
Answer» What is the nature of fullerenes on thermal and electrical conductivity?

39.	is magnetic properties only present in d block elements ? give reason cant we use the same formula to find the spin only magnetic moment of other elements in periodic table ?
Answer» is magnetic properties only present in d block elements ? give reason cant we use the same formula to find the spin only magnetic moment of other elements in periodic table ?