46295 + Interview Questions in Chemistry

1.	Among the following compounds the one that is polar and has the central atom with sp2 hybridisation is
Answer» Among the following compounds the one that is polar and has the central atom with $s p^{2}$ hybridisation is

Discussion

2.	Ziegler - Natta catalyst is
Answer» Ziegler - Natta catalyst is

Discussion

3.	The C-C bond length is 1.54∘A. C=C bond length is 1.33∘A. What is the circumference of the benzene ring? Bond length between single and double bond =1.4 ∘A.
Answer» The C-C bond length is $1.54 \circ A$ . C=C bond length is $1.33 \circ A$ . What is the circumference of the benzene ring? Bond length between single and double bond = $1.4 \circ A$ .

Discussion

4.	The minimum heat of hydrogenation is in
Answer» The minimum heat of hydrogenation is in

4.

The minimum heat of hydrogenation is in

Answer»

The minimum heat of hydrogenation is in

Discussion

5.	How much pure alcohol should be added to 400ml of strength 15% to make it’s strength 32%?
Answer» How much pure alcohol should be added to 400ml of strength 15% to make it’s strength 32%?

Discussion

6.	Heat of combustion of CH4, C2H4, C2H6 are -890, -1411, -1560 kJ/mol respectively. Which calorific fuel value in kJ/g?
Answer» Heat of combustion of CH4, C2H4, C2H6 are -890, -1411, -1560 kJ/mol respectively. Which calorific fuel value in kJ/g?

Discussion

7.	The increasing order of bond dissociation energies of C - C, C - H and H - Hbonds is
Answer» The increasing order of bond dissociation energies of C - C, C - H and H - Hbonds is

Discussion

8.	Which is a better oxidizing agent cl2 or f2
Answer» Which is a better oxidizing agent cl2 or f2

Discussion

9.	With which one of the following elements silicon should be doped so as to give p-type of semiconductor?
Answer» With which one of the following elements silicon should be doped so as to give p-type of semiconductor?

Discussion

10.	Which among the following are isoelectronic NO−3,CO2−3,ClO−3,SO2
Answer» Which among the following are isoelectronic $N O_{3}^{-}, C O_{3}^{2 -}, C l O_{3}^{-}, S O_{2}$

Discussion

11.	CaC2H2O−−→ACu2Cl2−−−−−→NH4OHB. Incorrect statement is
Answer» $C a C_{2} H_{2} O - - \to A C u_{2} C l_{2} - ---- \to N H_{4} O H B .$ Incorrect statement is

11.

CaC2H2O−−→ACu2Cl2−−−−−→NH4OHB. Incorrect statement is

Answer»

$C a C_{2} H_{2} O - - \to A C u_{2} C l_{2} - ---- \to N H_{4} O H B .$ Incorrect statement is

Discussion

12.	The uncertainty in the position of an object weighing 40 g is ±10−3 m. Calculate the uncertainty in its velocity.
Answer» The uncertainty in the position of an object weighing 40 g is $\pm 10^{- 3} m$ . Calculate the uncertainty in its velocity.

Discussion

13.	The most basic element is
Answer» The most basic element is

Discussion

14.	Identify the final product (D) of the reaction : Br2−−−−→FeBr3AMg−−−−−→ETHERBDRYICE/H3O⊕−−−−−−−−−−→CConc.HNO3−−−−−−−−→Conc.H2SO4D
Answer» Identify the final product (D) of the reaction : $B r_{2} - --- \to F e B r_{3} A M g - ---- \to E T H E R B D R Y I C E / H_{3} O^{\oplus} - --------- \to C C o n c . H N O_{3} - ------- \to C o n c . H_{2} S O_{4} D$

Discussion

15.	What does the collision theory explain?It's equation gives rate constant or rate of the reaction?
Answer» What does the collision theory explain?It's equation gives rate constant or rate of the reaction?

Discussion

16.	The Molisch test is a chemical test that determines the presence of:
Answer» The Molisch test is a chemical test that determines the presence of:

Discussion

17.	How many molecules of aspirin (Molar mass = 180 g/mol) are present in 50 mg of the tablet?
Answer» How many molecules of aspirin (Molar mass = $180 g/mol$ ) are present in $50 mg$ of the tablet?

Discussion

18.	The IUPAC name of CH3−CO−CHCl−CH2−COOH is
Answer» The IUPAC name of $C H_{3} - C O - C H C l - C H_{2} - C O O H$ is

Discussion

19.	The compound which gives red colour with Fehling's solution?
Answer» The compound which gives red colour with Fehling's solution?

Discussion

20.	The electron affinity values for the halogens show the following trend:
Answer» The electron affinity values for the halogens show the following trend:

Discussion

21.	Super glue or crazy glue is
Answer» Super glue or crazy glue is

Discussion

22.	Which of the following can be used as oxidizing agent?
Answer» Which of the following can be used as oxidizing agent?

Discussion

23.	Which of the following compounds is formed on ozonolysis followed by hydrolysis of but-2-ene?
Answer» Which of the following compounds is formed on ozonolysis followed by hydrolysis of but-2-ene?

Discussion

24.	Which of the following pairs can be distinguished by Fehling's solution ?
Answer» Which of the following pairs can be distinguished by Fehling's solution ?

Discussion

25.	CH3OCH3 is an example of:
Answer» CH₃OCH₃ is an example of:

Discussion

26.	When 1.0 g of oxalic acid (H2C2O4) is burned in a bomb calorimeter whose heat capacity is 8.75 kJ/K, the temperature increased by 0.312 K. The enthalpy of combustion of oxalic acid at 27∘C.
Answer» When $1.0 g$ of oxalic acid ( $H_{2} C_{2} O_{4})$ is burned in a bomb calorimeter whose heat capacity is $8.75 k J / K$ , the temperature increased by $0.312 K$ . The enthalpy of combustion of oxalic acid at $27^{\circ} C$ .

Discussion

27.	Among the following sets, the most stable ionic species are
Answer» Among the following sets, the most stable ionic species are

Discussion

28.	During the adsorption of a gas on the surface of a solid, which of the following is true?
Answer» During the adsorption of a gas on the surface of a solid, which of the following is true?

Discussion

29.	Which of the following has a co-ordinate bond ?
Answer» Which of the following has a co-ordinate bond ?

Discussion

30.	Calculate the mass of a coal sample in kg containing 0.05 % mass of iron pyrite (FeS2) that can produce 44.8 litres of SO2 at 1 atm and 273 K with 40 % reaction yield. FeS2+O2→Fe2O3+SO2 (Molar mass of Iron = 56 g/mol; molar mass of Sulphur = 32 g/mol)
Answer» Calculate the mass of a coal sample in kg containing 0.05 % mass of iron pyrite $(F e S_{2})$ that can produce 44.8 litres of $S O_{2}$ at 1 atm and $273 K$ with 40 % reaction yield. $F e S_{2} + O_{2} \to F e_{2} O_{3} + S O_{2}$ (Molar mass of Iron = $56 g/mol$ ; molar mass of Sulphur = $32 g/mol$ )

Discussion

31.	Which one of the following series contain electrophiles only?
Answer» Which one of the following series contain electrophiles only?

Discussion

32.	How is the normal reaction force an electromagnetic force?
Answer» How is the normal reaction force an electromagnetic force?

Discussion

33.	In the presence of AlCl3/HCl n-butane isomerizes to:
Answer» In the presence of $A l C l_{3} / H C l$ n-butane isomerizes to:

Discussion

34.	Which of the following compounds does not undergo nucleophilc substitution reactions?
Answer» Which of the following compounds does not undergo nucleophilc substitution reactions?

Discussion

35.	The hydrolysis constant for ZnCl2 for complete hydrolysis of Zn+2 will be
Answer» The hydrolysis constant for $Z n C l_{2}$ for complete hydrolysis of $Z n^{+ 2}$ will be

Discussion

36.	A solution of urea (M. mass 60 g/mol) freezes at −1.24 oC. If cryoscopic and ebullioscopic constants for water are 1.86 and 0.51 K kg/mol respectively, then at what temperature (in oC) would the above solution boil at one atmospheric pressure?
Answer» A solution of urea (M. mass 60 g/mol) freezes at $- 1.24^{o} C$ . If cryoscopic and ebullioscopic constants for water are 1.86 and 0.51 K kg/mol respectively, then at what temperature ( $i n^{o} C$ ) would the above solution boil at one atmospheric pressure?

Discussion

37.	The equilibrium constant for the reaction N2(g)+O2(g)⇌2NO(g) is 4×10−4 at 2000 K. In the presence of a catalyst the equilibrium is attained ten times faster. Therefore, the equilibrium constant in presence in catalyst of 2000 K is:
Answer» The equilibrium constant for the reaction $N_{2 (g)} + O_{2 (g)} ⇌ 2 N O_{(g)}$ is $4 \times 10^{- 4}$ at 2000 K. In the presence of a catalyst the equilibrium is attained ten times faster. Therefore, the equilibrium constant in presence in catalyst of 2000 K is:

Discussion

38.	What is incorrect about electromagnetic radiations?
Answer» What is incorrect about electromagnetic radiations?

Discussion

39.	The crystal system of a compound with unit cell dimension, a = 0.387 nm, b = 0.387 nm, c = 0.504 nm and α = β = 90o and γ = 120o is
Answer» The crystal system of a compound with unit cell dimension, a = 0.387 nm, b = 0.387 nm, c = 0.504 nm and α = β = 90^o and γ = 120^o is

Discussion

40.	Which of the following does not respond to Cannizaro’s reaction
Answer» Which of the following does not respond to Cannizaro’s reaction

Discussion

41.	The stability of the following alkali metal chlorides follows the order:
Answer» The stability of the following alkali metal chlorides follows the order:

Discussion

42.	An element has a face centred cubic structure with a cell edge of 0.2nm. calculate its density in gm/cm3 if 400gm of this element contains 4.8*10^24 atoms
Answer» An element has a face centred cubic structure with a cell edge of 0.2nm. calculate its density in gm/cm3 if 400gm of this element contains 4.8*10^24 atoms

Discussion

43.	Which of the following is a covalent hydride?
Answer» Which of the following is a covalent hydride?

Discussion

44.	The species which has 5th ionisation potential equal to 340 eV is:
Answer» The species which has $5^{t h}$ ionisation potential equal to 340 eV is:

Discussion

45.	The activation energies for the forward and reverse elementary reactions in the system A⇌B are 10.303 and 8.000 k cal respectively at 500K. Assuming the pre-exponential factor to be the same for both the forward and reverse steps and R = 2 cal K−1mol−1, calculate equilibrium constant of the reaction :
Answer» The activation energies for the forward and reverse elementary reactions in the system $A ⇌ B$ are 10.303 and 8.000 k cal respectively at 500K. Assuming the pre-exponential factor to be the same for both the forward and reverse steps and R = 2 cal $K^{- 1} m o l^{- 1}$ , calculate equilibrium constant of the reaction :

Discussion

46.	Given NO−2+H2O⇋HNO2+OH−, Kb=2.22×10−11 Thus, the degree of hydrolysis of 0.04 M NaNO2 solution is:
Answer» Given $N O_{2}^{-} + H_{2} O ⇋ H N O_{2} + O H^{-}$ , $K_{b} = 2.22 \times 10^{- 11}$ Thus, the degree of hydrolysis of 0.04 $M$ $N a N O_{2}$ solution is:

Discussion

47.	During hybridisation where does the energy come from to excite the electrons in the atom
Answer» During hybridisation where does the energy come from to excite the electrons in the atom

Discussion

48.	1-easy method to find the magnetic behavior of compound
Answer» 1-easy method to find the magnetic behavior of compound

Discussion

49.	Which of the following cannot be oxidized by H2O2
Answer» Which of the following cannot be oxidized by $H_{2} O_{2}$

Discussion

50.	Zinc, Cadmium and mercury shows the property of
Answer» Zinc, Cadmium and mercury shows the property of

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Among the following compounds the one that is polar and has the central atom with sp2 hybridisation is

Ziegler - Natta catalyst is

The C-C bond length is 1.54∘A. C=C bond length is 1.33∘A. What is the circumference of the benzene ring? Bond length between single and double bond =1.4 ∘A.

The minimum heat of hydrogenation is in

How much pure alcohol should be added to 400ml of strength 15% to make it’s strength 32%?

Heat of combustion of CH4, C2H4, C2H6 are -890, -1411, -1560 kJ/mol respectively. Which calorific fuel value in kJ/g?

The increasing order of bond dissociation energies of C - C, C - H and H - Hbonds is

Which is a better oxidizing agent cl2 or f2

With which one of the following elements silicon should be doped so as to give p-type of semiconductor?

Which among the following are isoelectronic NO−3,CO2−3,ClO−3,SO2

CaC2H2O−−→ACu2Cl2−−−−−→NH4OHB. Incorrect statement is

The uncertainty in the position of an object weighing 40 g is ±10−3 m. Calculate the uncertainty in its velocity.

The most basic element is

Identify the final product (D) of the reaction : Br2−−−−→FeBr3AMg−−−−−→ETHERBDRYICE/H3O⊕−−−−−−−−−−→CConc.HNO3−−−−−−−−→Conc.H2SO4D

What does the collision theory explain?It's equation gives rate constant or rate of the reaction?

The Molisch test is a chemical test that determines the presence of:

How many molecules of aspirin (Molar mass = 180 g/mol) are present in 50 mg of the tablet?

The IUPAC name of CH3−CO−CHCl−CH2−COOH is

The compound which gives red colour with Fehling's solution?

The electron affinity values for the halogens show the following trend:

Super glue or crazy glue is

Which of the following can be used as oxidizing agent?

Which of the following compounds is formed on ozonolysis followed by hydrolysis of but-2-ene?

Which of the following pairs can be distinguished by Fehling's solution ?

CH3OCH3 is an example of:

When 1.0 g of oxalic acid (H2C2O4) is burned in a bomb calorimeter whose heat capacity is 8.75 kJ/K, the temperature increased by 0.312 K. The enthalpy of combustion of oxalic acid at 27∘C.

Among the following sets, the most stable ionic species are

During the adsorption of a gas on the surface of a solid, which of the following is true?

Which of the following has a co-ordinate bond ?

Calculate the mass of a coal sample in kg containing 0.05 % mass of iron pyrite (FeS2) that can produce 44.8 litres of SO2 at 1 atm and 273 K with 40 % reaction yield. FeS2+O2→Fe2O3+SO2 (Molar mass of Iron = 56 g/mol; molar mass of Sulphur = 32 g/mol)

Which one of the following series contain electrophiles only?

How is the normal reaction force an electromagnetic force?

In the presence of AlCl3/HCl n-butane isomerizes to:

Which of the following compounds does not undergo nucleophilc substitution reactions?

The hydrolysis constant for ZnCl2 for complete hydrolysis of Zn+2 will be

A solution of urea (M. mass 60 g/mol) freezes at −1.24 oC. If cryoscopic and ebullioscopic constants for water are 1.86 and 0.51 K kg/mol respectively, then at what temperature (in oC) would the above solution boil at one atmospheric pressure?

The equilibrium constant for the reaction N2(g)+O2(g)⇌2NO(g) is 4×10−4 at 2000 K. In the presence of a catalyst the equilibrium is attained ten times faster. Therefore, the equilibrium constant in presence in catalyst of 2000 K is:

What is incorrect about electromagnetic radiations?

The crystal system of a compound with unit cell dimension, a = 0.387 nm, b = 0.387 nm, c = 0.504 nm and α = β = 90o and γ = 120o is

Which of the following does not respond to Cannizaro’s reaction

The stability of the following alkali metal chlorides follows the order:

An element has a face centred cubic structure with a cell edge of 0.2nm. calculate its density in gm/cm3 if 400gm of this element contains 4.8*10^24 atoms

Which of the following is a covalent hydride?

The species which has 5th ionisation potential equal to 340 eV is:

Given NO−2+H2O⇋HNO2+OH−, Kb=2.22×10−11 Thus, the degree of hydrolysis of 0.04 M NaNO2 solution is:

During hybridisation where does the energy come from to excite the electrons in the atom

1-easy method to find the magnetic behavior of compound

Which of the following cannot be oxidized by H2O2

Zinc, Cadmium and mercury shows the property of