46295 + Interview Questions in Chemistry

1.	A binary solid (AB) has a rock salt structure. If the edge length is 400 pm and radius of cation is 80 pm, the radius of anion is:
Answer» A binary solid $(A B)$ has a rock salt structure. If the edge length is $400 pm$ and radius of cation is $80 pm$ , the radius of anion is:

Discussion

2.	Predict the relative bond lengths a and b, in napthalene
Answer» Predict the relative bond lengths a and b, in napthalene

Discussion

3.	Carbon is in the lowest oxidation state in
Answer» Carbon is in the lowest oxidation state in

Discussion

4.	For a reaction scheme, Ak1−→Bk2−→C, if the rate of formation of B is set to be zero then the concentration of B is given by:
Answer» For a reaction scheme, $A k_{1} - \to B k_{2} - \to C$ , if the rate of formation of $B$ is set to be zero then the concentration of $B$ is given by:

Discussion

5.	What is the current gain for a transistor used as common emitter amplifier, if the current gain of the common base n-p-n transistor is 0.96 ?
Answer» What is the current gain for a transistor used as common emitter amplifier, if the current gain of the common base $n-p-n$ transistor is $0.96$ ?

Discussion

6.	In the preparation of Grignard's reagent the use of iodine is a) to lower down the temperature b) to prevent reverse reaction c) to remove impurities d) as a catalyst
Answer» In the preparation of Grignard's reagent the use of iodine is a) to lower down the temperature b) to prevent reverse reaction c) to remove impurities d) as a catalyst

Discussion

7.	When radiation of λ=253.7 nm strikes the copper plate, the energy required to stop the ejection of electrons from copper plate is 0.24 eV. Calculate the work function of copper.
Answer» When radiation of $λ = 253.7 nm$ strikes the copper plate, the energy required to stop the ejection of electrons from copper plate is $0.24 eV$ . Calculate the work function of copper.

Discussion

8.	why selectivity of catalyst increase from group 5 to11 and highest in group 7 to9
Answer» why selectivity of catalyst increase from group 5 to11 and highest in group 7 to9

Discussion

9.	mass of one element of an element is 4 ×10^{-24}g.this isequal to
Answer» mass of one element of an element is 4 ×10^{-24}g.this isequal to

Discussion

10.	The number of Cl− and Ca+2 ions in 222g. of CaCl2 are
Answer» The number of $C l^{-}$ and $C a^{+ 2}$ ions in 222g. of $C a C l_{2}$ are

Discussion

11.	which of the following is most likely formula of platinum complex, if 1/4 of total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution- (1) PtCl4.6H20 (2) PtCl4.5H2O (3) PtCl2.2H2O (4) PtCl4.3H2O
Answer» which of the following is most likely formula of platinum complex, if 1/4 of total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution- (1) PtCl4.6H20 (2) PtCl4.5H2O (3) PtCl2.2H2O (4) PtCl4.3H2O

Discussion

12.	An orange coloured solution acidified with H2SO4 and treated with a substance'X' gives a blue coloured solution of CrO5 .The substance 'X' is :
Answer» An orange coloured solution acidified with $H_{2} S O_{4}$ and treated with a substance'X' gives a blue coloured solution of $C r O_{5}$ .The substance 'X' is :

Discussion

13.	The specific conductance of a N10 KCl solution at 180 C is 1.12×10−2 mho cm−1. The resistance of the soution contained in the cell is found to be 65 ohm. Calculate the cell constant:
Answer» The specific conductance of a $\frac{N}{10} K C l$ solution at $18^{0} C$ is $1.12 \times 10^{- 2} m h o c m^{- 1}$ . The resistance of the soution contained in the cell is found to be $65 o h m$ . Calculate the cell constant:

Discussion

14.	Correct order for the rate of dehydration of the given compounds with H2SO4 is:
Answer» Correct order for the rate of dehydration of the given compounds with $H_{2} S O_{4}$ is:

Discussion

15.	28A 0.0150 mol sample of an ideal gas is allowed to expand at 294 K from 10.00 atm to 1.00 atm.If external pressure is kept constant at 1.00 atm.calculate the work done??.
Answer» 28A 0.0150 mol sample of an ideal gas is allowed to expand at 294 K from 10.00 atm to 1.00 atm.If external pressure is kept constant at 1.00 atm.calculate the work done??.

Discussion

16.	Which one among the following does not have hydrogen bond?
Answer» Which one among the following does not have hydrogen bond?

Discussion

17.	What is sulphonamide reaction
Answer» What is sulphonamide reaction

Discussion

18.	For the given reaction: 2A+B→3C+D.Which of the following expression(s) is/are correct regarding overall rate of reaction (r)?
Answer» For the given reaction: $2 A + B \to 3 C + D$ . Which of the following expression(s) is/are correct regarding overall rate of reaction $(r)$ ?

Discussion

19.	Identify the correct statement which corresponds to accelarator retarder.
Answer» Identify the correct statement which corresponds to accelarator retarder.

Discussion

20.	The volume of oxgen liberated from 0.96g of H2O2 at STP is
Answer» The volume of oxgen liberated from 0.96g of H₂O₂at STP is

Discussion

21.	How to find the number of bonds in oleic acid ??
Answer» How to find the number of bonds in oleic acid ??

Discussion

22.	10 ml of hydrocarbon was completely burnt in 80 ml of O2 at ntp.The remaining gaseous mixture occupies 70 ml at Ntp.The volume becomes 50 ml when passed through KOH,what is the formula of hydrocarbon?
Answer» 10 ml of hydrocarbon was completely burnt in 80 ml of O2 at ntp.The remaining gaseous mixture occupies 70 ml at Ntp.The volume becomes 50 ml when passed through KOH,what is the formula of hydrocarbon?

Discussion

23.	Despite having weak van der Waals forces why are alkanes so unreactive?
Answer» Despite having weak van der Waals forces why are alkanes so unreactive?

Discussion

24.	The decomposition of ozone proceeds as O3⇔O2+O(fast)O+O3→2O2(slow) The rate expression should be
Answer» The decomposition of ozone proceeds as $O_{3} \Leftrightarrow O_{2} + O (f a s t) O + O_{3} \to 2 O_{2} (s l o w)$ The rate expression should be

Discussion

25.	A solid solution is made up of two solids "A" and "B". Mass percentage of "A" is 40% by mass in a solid solution. Find the molar mass of "B" if the mole fraction of "A" (xA) is 0.20 and molar mass of "A" is 200 g/mol.
Answer» A solid solution is made up of two solids "A" and "B". Mass percentage of "A" is 40% by mass in a solid solution. Find the molar mass of "B" if the mole fraction of "A" $(x_{A}) is 0.20$ and molar mass of "A" is 200 g/mol.

Discussion

26.	18. No of atoms un fcc unit cell
Answer» 18. No of atoms un fcc unit cell

Discussion

27.	Why tetragonal crystal system does not have end-face centred unit cell?
Answer» Why tetragonal crystal system does not have end-face centred unit cell?

Discussion

28.	Steam enters a turbine at 30 bar, 300oC (u=2750 ,kJ/kg, h=2993,kJ/kg) and exits the turbine as saturated liquid at 15 kPa (u = 225 kJ/kg, h = 226 kJ/kg). Heat loss to the surrounding is 50 kJ/kg of steam flowing through the turbine. Neglecting changes in kinetic energy and potential energy, the work output of the turbine (in kJ/kg of steam) is 2717
Answer» Steam enters a turbine at 30 bar, $300^{o} C$ (u=2750 ,kJ/kg, h=2993,kJ/kg) and exits the turbine as saturated liquid at 15 kPa (u = 225 kJ/kg, h = 226 kJ/kg). Heat loss to the surrounding is 50 kJ/kg of steam flowing through the turbine. Neglecting changes in kinetic energy and potential energy, the work output of the turbine (in kJ/kg of steam) is 2717

Discussion

29.	Describe the features of Resonance.
Answer» Describe the features of Resonance.

Discussion

30.	What is the number of carbon atoms per unit cell of graphite?
Answer» What is the number of carbon atoms per unit cell of graphite?

Discussion

31.	Classify the following as addition and condensation polymers: Terylene, Bakelite, Polyvinyl chloride, Polythene.
Answer» Classify the following as addition and condensation polymers: Terylene, Bakelite, Polyvinyl chloride, Polythene.

Discussion

32.	Which of the following reactions would convert pentan-3-ol (A) into deuterated compound? CH3−CH2−C\|DH−CH2−CH3
Answer» Which of the following reactions would convert pentan-3-ol (A) into deuterated compound? $C H_{3} - C H_{2} - C \| D H - C H_{2} - C H_{3}$

Discussion

33.	Calculate the lattice enthalpy of KCl from the following data at standard states-Enthalpy of sublimation of K=89 kJmol−1Enthalpy of dissociation of Cl2=244 kJmol−1Ionisation energy of K=425 kJmol−1Electron gain enthalpy of Cl=−355 kJmol−1Enthalpy of formation of KCl=−438 kJmol−1
Answer» Calculate the lattice enthalpy of $K C l$ from the following data at standard states- Enthalpy of sublimation of $K = 89 k J m o l^{- 1}$ Enthalpy of dissociation of $C l_{2} = 244 k J m o l^{- 1}$ Ionisation energy of $K = 425 k J m o l^{- 1}$ Electron gain enthalpy of $C l = - 355 k J m o l^{- 1}$ Enthalpy of formation of $K C l = - 438 k J m o l^{- 1}$

Discussion

34.	Faraday conducted many experiments. So naturally he would have to make several calculations. He once passed a current of 1 A through a wire. What do you think is the number of electrons that moved past a point in the wire in one second?
Answer» Faraday conducted many experiments. So naturally he would have to make several calculations. He once passed a current of 1 A through a wire. What do you think is the number of electrons that moved past a point in the wire in one second?

Discussion

35.	Solution having osmotic pressure nearer to that equimolar solution of K4[Fe(CN)6] is:
Answer» Solution having osmotic pressure nearer to that equimolar solution of $K_{4} [F e (C N)_{6}]$ is:

Discussion

36.	tertiary alcohol +al2o3/△
Answer» tertiary alcohol +al2o3/△

Discussion

37.	For all the sets A and B, A−(A∩B)=
Answer» For all the sets A and B, A−(A∩B)=

Discussion

38.	What is difference between interstitial defect and frenkel defect? And how does density of substances increase due to these defects? (Even if density increases at one point doesn't it decrease at another.)
Answer» What is difference between interstitial defect and frenkel defect? And how does density of substances increase due to these defects? (Even if density increases at one point doesn't it decrease at another.)

Discussion

39.	45. How much silver will be obtained by the quantity of the current which displaces 5.6loyres of H2? 54g 108g 13.5g 20g
Answer» 45. How much silver will be obtained by the quantity of the current which displaces 5.6loyres of H2? 54g 108g 13.5g 20g

Discussion

40.	The electronegativity of p-block elements across a period:
Answer» The electronegativity of p-block elements across a period:

Discussion

41.	Explain geometrical isomerism in cyclohexane in details.
Answer» Explain geometrical isomerism in cyclohexane in details.

Discussion

42.	33. In a CCP structure of compound xy atoms is present at octahedral voids the ratio of 6th coordination number and third coordination number for an atom X located at body centre is
Answer» 33. In a CCP structure of compound xy atoms is present at octahedral voids the ratio of 6th coordination number and third coordination number for an atom X located at body centre is

Discussion

43.

Group - 1 gives a list of test methods for evaluating properties of aggregates. Group - II gives the list of properties to be evaluated. Group - I (Test Methods)Group - II (Properties)P. Soundness test1. StrengthQ. Crushing test2. Resistance to weatheringR. Los Angeles abrasion test3. AdhesionS. Stripping value test4. HardnessThe correct match of test methods under Group - I to properties under Group - II, is

Answer»

Group - 1 gives a list of test methods for evaluating properties of aggregates. Group - II gives the list of properties to be evaluated.

Group - I (Test Methods)	Group - II (Properties)
P. Soundness test	1. Strength
Q. Crushing test	2. Resistance to weathering
R. Los Angeles abrasion test	3. Adhesion
S. Stripping value test	4. Hardness

The correct match of test methods under Group - I to properties under Group - II, is

Discussion

44.	20.Pcl5 is 40% dissociated according to the following reaction when equilibrium pressure is 2 atm. It will be 80% dissociated when equilibrium pressure is approximately PCl5(g)=PCl3(g)+Cl2(g) Options :A)0.2atm B)0.5atm C)0.4atm D)4atm
Answer» 20.Pcl5 is 40% dissociated according to the following reaction when equilibrium pressure is 2 atm. It will be 80% dissociated when equilibrium pressure is approximately PCl5(g)=PCl3(g)+Cl2(g) Options :A)0.2atm B)0.5atm C)0.4atm D)4atm

Discussion

45.	Are formula to find out optical and geometrical isomers applicable for cyclic compounds?
Answer» Are formula to find out optical and geometrical isomers applicable for cyclic compounds?

Discussion

46.	The correct order of increasing bond angles in the following triatomic species is
Answer» The correct order of increasing bond angles in the following triatomic species is

Discussion

47.	42. Consider the following reactions The mechanisms of reactions (i) and (ii) are respectively 1) Sn1 and Sn2 2) Sn1 and Sn1 3) Sn2 and Sn2 4) Sn2 and Sn1
Answer» 42. Consider the following reactions The mechanisms of reactions (i) and (ii) are respectively 1) Sn1 and Sn2 2) Sn1 and Sn1 3) Sn2 and Sn2 4) Sn2 and Sn1

Discussion

48.	The product of the reaction is:
Answer» The product of the reaction is:

Discussion

49.	At equilibrium of the reaction of dissociation of N2O4 . The observed molecular weight of N2O4 is 80g/mol at 350K . Find the percentage of dissociation of N2O4 at 350K.
Answer» At equilibrium of the reaction of dissociation of N2O4 . The observed molecular weight of N2O4 is 80g/mol at 350K . Find the percentage of dissociation of N2O4 at 350K.

Discussion

50.	3. Which of the following compounds does not have diastereoisomers?(a) 2,3-Butanediol(b) 2,3-Dibromopentane(c) 2-Butene(d) 2-Butanol
Answer» 3. Which of the following compounds does not have diastereoisomers?(a) 2,3-Butanediol(b) 2,3-Dibromopentane(c) 2-Butene(d) 2-Butanol

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A binary solid (AB) has a rock salt structure. If the edge length is 400 pm and radius of cation is 80 pm, the radius of anion is:

Predict the relative bond lengths a and b, in napthalene

Carbon is in the lowest oxidation state in

For a reaction scheme, Ak1−→Bk2−→C, if the rate of formation of B is set to be zero then the concentration of B is given by:

What is the current gain for a transistor used as common emitter amplifier, if the current gain of the common base n-p-n transistor is 0.96 ?

In the preparation of Grignard's reagent the use of iodine is a) to lower down the temperature b) to prevent reverse reaction c) to remove impurities d) as a catalyst

When radiation of λ=253.7 nm strikes the copper plate, the energy required to stop the ejection of electrons from copper plate is 0.24 eV. Calculate the work function of copper.

why selectivity of catalyst increase from group 5 to11 and highest in group 7 to9

mass of one element of an element is 4 ×10^{-24}g.this isequal to

The number of Cl− and Ca+2 ions in 222g. of CaCl2 are

which of the following is most likely formula of platinum complex, if 1/4 of total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution- (1) PtCl4.6H20 (2) PtCl4.5H2O (3) PtCl2.2H2O (4) PtCl4.3H2O

An orange coloured solution acidified with H2SO4 and treated with a substance'X' gives a blue coloured solution of CrO5 .The substance 'X' is :

The specific conductance of a N10 KCl solution at 180 C is 1.12×10−2 mho cm−1. The resistance of the soution contained in the cell is found to be 65 ohm. Calculate the cell constant:

Correct order for the rate of dehydration of the given compounds with H2SO4 is:

28A 0.0150 mol sample of an ideal gas is allowed to expand at 294 K from 10.00 atm to 1.00 atm.If external pressure is kept constant at 1.00 atm.calculate the work done??.

Which one among the following does not have hydrogen bond?

What is sulphonamide reaction

For the given reaction: 2A+B→3C+D.Which of the following expression(s) is/are correct regarding overall rate of reaction (r)?

Identify the correct statement which corresponds to accelarator retarder.

The volume of oxgen liberated from 0.96g of H2O2 at STP is

How to find the number of bonds in oleic acid ??

10 ml of hydrocarbon was completely burnt in 80 ml of O2 at ntp.The remaining gaseous mixture occupies 70 ml at Ntp.The volume becomes 50 ml when passed through KOH,what is the formula of hydrocarbon?

Despite having weak van der Waals forces why are alkanes so unreactive?

The decomposition of ozone proceeds as O3⇔O2+O(fast)O+O3→2O2(slow) The rate expression should be

A solid solution is made up of two solids "A" and "B". Mass percentage of "A" is 40% by mass in a solid solution. Find the molar mass of "B" if the mole fraction of "A" (xA) is 0.20 and molar mass of "A" is 200 g/mol.

18. No of atoms un fcc unit cell

Why tetragonal crystal system does not have end-face centred unit cell?

Describe the features of Resonance.

What is the number of carbon atoms per unit cell of graphite?

Classify the following as addition and condensation polymers: Terylene, Bakelite, Polyvinyl chloride, Polythene.

Which of the following reactions would convert pentan-3-ol (A) into deuterated compound? CH3−CH2−C|DH−CH2−CH3

Calculate the lattice enthalpy of KCl from the following data at standard states-Enthalpy of sublimation of K=89 kJmol−1Enthalpy of dissociation of Cl2=244 kJmol−1Ionisation energy of K=425 kJmol−1Electron gain enthalpy of Cl=−355 kJmol−1Enthalpy of formation of KCl=−438 kJmol−1

Faraday conducted many experiments. So naturally he would have to make several calculations. He once passed a current of 1 A through a wire. What do you think is the number of electrons that moved past a point in the wire in one second?

Solution having osmotic pressure nearer to that equimolar solution of K4[Fe(CN)6] is:

tertiary alcohol +al2o3/△

For all the sets A and B, A−(A∩B)=

What is difference between interstitial defect and frenkel defect? And how does density of substances increase due to these defects? (Even if density increases at one point doesn't it decrease at another.)

45. How much silver will be obtained by the quantity of the current which displaces 5.6loyres of H2? 54g 108g 13.5g 20g

The electronegativity of p-block elements across a period:

Explain geometrical isomerism in cyclohexane in details.

33. In a CCP structure of compound xy atoms is present at octahedral voids the ratio of 6th coordination number and third coordination number for an atom X located at body centre is

20.Pcl5 is 40% dissociated according to the following reaction when equilibrium pressure is 2 atm. It will be 80% dissociated when equilibrium pressure is approximately PCl5(g)=PCl3(g)+Cl2(g) Options :A)0.2atm B)0.5atm C)0.4atm D)4atm

Are formula to find out optical and geometrical isomers applicable for cyclic compounds?

The correct order of increasing bond angles in the following triatomic species is

42. Consider the following reactions The mechanisms of reactions (i) and (ii) are respectively 1) Sn1 and Sn2 2) Sn1 and Sn1 3) Sn2 and Sn2 4) Sn2 and Sn1

The product of the reaction is:

At equilibrium of the reaction of dissociation of N2O4 . The observed molecular weight of N2O4 is 80g/mol at 350K . Find the percentage of dissociation of N2O4 at 350K.

3. Which of the following compounds does not have diastereoisomers?(a) 2,3-Butanediol(b) 2,3-Dibromopentane(c) 2-Butene(d) 2-Butanol