46295 + Interview Questions in Chemistry

1.	Which of the following elements have positive reduction potential?
Answer» Which of the following elements have positive reduction potential?

Discussion

2.	If I completely annihilate a hair of your body that has a mass of 1μg then how much energy will I get in the process.
Answer» If I completely annihilate a hair of your body that has a mass of $1 μ g$ then how much energy will I get in the process.

Discussion

3.	Two identical blocks of iron, one at 10oC and the other at 20oC, are put in contact. Suppose the cooler block cools to 5oC and the warmer block warms to 25oC. This would violate the
Answer» Two identical blocks of iron, one at 10^oC and the other at 20^oC, are put in contact. Suppose the cooler block cools to 5^oC and the warmer block warms to 25^oC. This would violate the

Discussion

4.	Which one of the following does not give a white precipitate with silver nitrate solution?
Answer» Which one of the following does not give a white precipitate with silver nitrate solution?

Discussion

5.	The value of Δs is negative for the process
Answer» The value of $Δ s$ is negative for the process

Discussion

6.	In the radioactive disintegration series 232Th90→208Pb82, involving α and β decay, the total number of α and β particles emitted are:
Answer» In the radioactive disintegration series $^{232} T h_{90} \to^{208} P b_{82}$ , involving $α a n d β$ decay, the total number of $α a n d β$ particles emitted are:

Discussion

7.	The monomeric unit of terylene are glycol and which of the following
Answer» The monomeric unit of terylene are glycol and which of the following

Discussion

8.	On heating with concetrated NaOH solution in an inert atmosphere of CO2, white phospherous gives a gas. Which of the following statement is incorrect about the gas?
Answer» On heating with concetrated NaOH solution in an inert atmosphere of $C O_{2}$ , white phospherous gives a gas. Which of the following statement is incorrect about the gas?

Discussion

9.	The mobility of metal ions in aqueous medium (Li⊕,Na⊕,K⊕,Rb⊕) in an electric field, follows the order:
Answer» The mobility of metal ions in aqueous medium $(L i^{\oplus}, N a^{\oplus}, K^{\oplus}, R b^{\oplus})$ in an electric field, follows the order:

Discussion

10.	The electrical conductance of PtCl4.2NH3 in aqueous solution is.___
Answer» The electrical conductance of $P t C l_{4} .2 N H_{3}$ in aqueous solution is.___

Discussion

11.	Sodium hydroxide is produced on a large scale:
Answer» Sodium hydroxide is produced on a large scale:

Discussion

12.	The proteins which are insoluble in water are
Answer» The proteins which are insoluble in water are

Discussion

13.	When sulphur trioxide gas is dissolved in H2SO4, the product obtained is
Answer» When sulphur trioxide gas is dissolved in $H_{2} S O_{4}$ , the product obtained is

Discussion

14.	The oxidation state of Mo in its oxido-complex species [Mo2O4(C2H4)2(H2O)2]2− is:
Answer» The oxidation state of $M o$ in its oxido-complex species $[M o_{2} O_{4} (C_{2} H_{4})_{2} (H_{2} O)_{2}]^{2 -}$ is:

Discussion

15.	A ballon of diameter 21 m weighs 100 kg. Calculate its payload if it is filled with helium at 1.0 atm and 27 ∘C. Density of air is 1.2 kg m−3 (R=0.08 dm3atm K−1mol−1)
Answer» A ballon of diameter $21 m$ weighs $100 k g$ . Calculate its payload if it is filled with helium at $1.0 a t m$ and $27^{\circ} C .$ Density of air is $1.2 {kg m}^{- 3}$ $(R = 0.08 d m^{3} {atm K}^{- 1} m o l^{- 1})$

Discussion

16.	Differentiate between minerals' and ores'.
Answer» Differentiate between minerals' and ores'.

Discussion

17.	A certain buffer solution contains equal concentration of X− and HX. The Kb for X− is 10−10. The pH of the buffer is: (correct answer +1, wrong answer -0.25)
Answer» A certain buffer solution contains equal concentration of $X^{-}$ and $H X$ . The $K_{b}$ for $X^{-}$ is $10^{- 10}$ . The $p H$ of the buffer is: (correct answer +1, wrong answer -0.25)

Discussion

18.	Predict the order of reactivity of the following compounds in SN1 and SN2 reactions C6H5CH2Br , C6H5CH(C6H5)Br , C6H5CH(CH3)Br , C6H5C(CH3)(C6H5)
Answer» Predict the order of reactivity of the following compounds in SN1 and SN2 reactions C6H5CH2Br , C6H5CH(C6H5)Br , C6H5CH(CH3)Br , C6H5C(CH3)(C6H5)

18.

Predict the order of reactivity of the following compounds in SN1 and SN2 reactions C6H5CH2Br , C6H5CH(C6H5)Br , C6H5CH(CH3)Br , C6H5C(CH3)(C6H5)

Answer»

Predict the order of reactivity of the following compounds in SN1 and SN2 reactions

C6H5CH2Br , C6H5CH(C6H5)Br , C6H5CH(CH3)Br , C6H5C(CH3)(C6H5)

Discussion

19.	The stability of +1 oxidation state increases in the sequence:
Answer» The stability of +1 oxidation state increases in the sequence:

Discussion

20.	A container (volume V) has an ideal gas at 4 atm and 300 K. This is connected by a tube with another container of volume 2 V, which has a gas at 8 atm and 600 K. What will be final pressure of each container if the temperature is maintained - the container with volume V at 300 K and the 2V one at 600 K?
Answer» A container (volume V) has an ideal gas at 4 atm and 300 K. This is connected by a tube with another container of volume 2 V, which has a gas at 8 atm and 600 K. What will be final pressure of each container if the temperature is maintained - the container with volume V at 300 K and the 2V one at 600 K?

Discussion

21.	The mass ratio of carbon to hydrogen in methane is 3:1. How much hydrogen will it take to react with 36 gms of carbon to form methane?
Answer» The mass ratio of carbon to hydrogen in methane is 3:1. How much hydrogen will it take to react with 36 gms of carbon to form methane?

Discussion

22.	Determine the following regarding ICl−4 (i) Number of valance electrons in central atom (ii) Number of Ligands (iii) Anionic charge (iv) Cationic charge
Answer» Determine the following regarding $I C l_{4}^{-}$ (i) Number of valance electrons in central atom (ii) Number of Ligands (iii) Anionic charge (iv) Cationic charge

22.

Determine the following regarding ICl−4 (i) Number of valance electrons in central atom (ii) Number of Ligands (iii) Anionic charge (iv) Cationic charge

Answer»

Determine the following regarding $I C l_{4}^{-}$

(i) Number of valance electrons in central atom
(ii) Number of Ligands
(iii) Anionic charge
(iv) Cationic charge

Discussion

23.	Which one of the following orbital is filled first in case of N2?
Answer» Which one of the following orbital is filled first in case of $N_{2}$ ?

Discussion

24.	How crystal solids are classified?write any two examples?
Answer» How crystal solids are classified?write any two examples?

Discussion

25.	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

26.	Among the following molecules, which contains the maximum number of P−H bonds?
Answer» Among the following molecules, which contains the maximum number of $P - H$ bonds?

Discussion

27.	Calculate the number of peroxy linkage(s) in H3PO5.
Answer» Calculate the number of peroxy linkage(s) in $H_{3} P O_{5}$ .

Discussion

28.	The smelting of ore in a blast furnace involves, which of the following process /(es)?
Answer» The smelting of ore in a blast furnace involves, which of the following process /(es)?

Discussion

29.	The nucleus AZY goes through gamma decay. What shall be the product?
Answer» The nucleus $_{Z}^{A} Y$ goes through gamma decay. What shall be the product?

Discussion

30.	For the gaseous reactions: A(g)⇌3B(g) :KP1and P(g)⇌2Q(g)+R(g); KP2 Occuring in two different vessels at the same temperature, the degree of dissociation of A and P are same when the total equilibrium pressure of gases in both vessels are same. If KP1:KP2 is X:4, then value of "X" is
Answer» For the gaseous reactions: $A (g) ⇌ 3 B (g) : K_{P_{1}} a n d P (g) ⇌ 2 Q (g) + R (g); K_{P_{2}}$ Occuring in two different vessels at the same temperature, the degree of dissociation of A and P are same when the total equilibrium pressure of gases in both vessels are same. If $K_{P_{1}} : K_{P_{2}}$ is $X : 4,$ then value of "X" is

Discussion

31.	Not let's try this in 3-D. Calculate r and a relationship from the following figure. If a=x∗r, type x. ___
Answer» Not let's try this in 3-D. Calculate r and a relationship from the following figure. If $a = x * r$ , type x. ___

31.

Not let's try this in 3-D. Calculate r and a relationship from the following figure. If a=x∗r, type x. ___

Answer»

Not let's try this in 3-D. Calculate r and a relationship from the following figure.

If $a = x * r$ , type x.

___

Discussion

32.	Arrange the following in order of increasing mass (i) 3.0115×1023 molecules of white phosphorus (P4) (ii) 10 moles of H2 gas (iii) 1 g molecule of anhydrous Na2CO3 (iv) 33.6 L of CO2 gas at S.T.P
Answer» Arrange the following in order of increasing mass (i) $3.0115 \times 10^{23}$ molecules of white phosphorus $(P_{4})$ (ii) $10$ moles of $H_{2}$ gas (iii) $1 g$ molecule of anhydrous $N a_{2} C O_{3}$ (iv) $33.6 L$ of $C O_{2}$ gas at S.T.P

Discussion

33.	Which one of the following would undergo hydrolysis most readily with aqueous sodium hydroxide to form the corresponding hydroxy derivatives?
Answer» Which one of the following would undergo hydrolysis most readily with aqueous sodium hydroxide to form the corresponding hydroxy derivatives?

Discussion

34.	Consider a M of NH3(aq) is present in a solution containing AgCl and x is the solublity of AgCl in this solution. Given: Kf is the formation constant of [Ag(NH3)2]+, Ksp is the solubility product of AgCl. Which of the following relation is correct.
Answer» Consider $a M$ of $N H_{3} (a q)$ is present in a solution containing $A g C l$ and $x$ is the solublity of $A g C l$ in this solution. Given: $K_{f}$ is the formation constant of $[A g (N H_{3})_{2}]^{+}$ , $K_{s p}$ is the solubility product of $A g C l$ . Which of the following relation is correct.

Discussion

35.	For the reaction H2 (g) + I2 (g) ⇋ 2HI(g)the equilibrium constant Kp changes with
Answer» For the reaction $H_{2}$ (g) + $I_{2}$ (g) $⇋$ 2HI(g)the equilibrium constant $K_{p}$ changes with

Discussion

36.	The heat of neutralisation of a strong acid and a strong alkali is −57.0 kJ mol−1. The heat released when 0.5 mole of HNO3 solution is mixed with 0.2 mole of KOH is:
Answer» The heat of neutralisation of a strong acid and a strong alkali is $- 57.0 k J m o l^{- 1} .$ The heat released when $0.5 m o l e$ of $H N O_{3}$ solution is mixed with $0.2 m o l e$ of $K O H$ is:

Discussion

37.	Why is chlorine and not fluorine the element with the highest electron affinity?
Answer» Why is chlorine and not fluorine the element with the highest electron affinity?

Discussion

38.	N2O4 dissociates as,N2O4(g)⇌2NO2(g) at 55 oC and 1.2 atmosphere, % decomposition of N2O4 is 50.0%. At what pressure and same temperature, the equilibrium mixture has the ratio of N2O4:NO2 as 1:8? (Report the answer upto two decimal)
Answer» $N_{2} O_{4}$ dissociates as, $N_{2} O_{4} (g) ⇌ 2 N O_{2} (g)$ at $55^{o} C$ and $1.2$ atmosphere, $%$ decomposition of $N_{2} O_{4}$ is $50.0 %$ . At what pressure and same temperature, the equilibrium mixture has the ratio of $N_{2} O_{4} : N O_{2}$ as $1 : 8$ ? (Report the answer upto two decimal)

Discussion

39.	Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When CO2 is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A?
Answer» Chemical $A$ is used for water softening to remove temporary hardness. $A$ reacts with sodium carbonate to generate caustic soda. When $C O_{2}$ is bubbled through a solution of $A$ , it turns cloudy. What is the chemical formula of $A$ ?

Discussion

40.	Under similar conditions which of the following gases will diffuse four times as quickly as oxygen?
Answer» Under similar conditions which of the following gases will diffuse four times as quickly as oxygen?

Discussion

41.	what is the total charge in couloumbs of 72 kg of electron
Answer» what is the total charge in couloumbs of 72 kg of electron

Discussion

42.	5 ml of 0.1M Pb(NO3)2 is mixed with 10 ml of 0.02 M KI. The amount of PbI2 precipitated will be about:
Answer» 5 ml of $0.1 M P b (N O_{3})_{2}$ is mixed with 10 ml of 0.02 M $K I$ . The amount of $P b I_{2}$ precipitated will be about:

Discussion

43.	What is (X) in the following reaction?
Answer» What is (X) in the following reaction?

Discussion

44.	Calculate the number of electrons required to deposit 40.5g of Al.
Answer» Calculate the number of electrons required to deposit 40.5g of Al.

Discussion

45.	In the equation H2S+2HNO3→2H2O+2NO2+S, the equivalent weight of hydrogen sulphide is:
Answer» In the equation $H_{2} S + 2 H N O_{3} \to 2 H_{2} O + 2 N O_{2} + S$ , the equivalent weight of hydrogen sulphide is:

Discussion

46.	Calculate the standard heat of formation of carbon-di-sulphide(l). Given that the standard heats of combustion of carbon(s), sulphur(s) & carbon disulphide(l) are -393.3, -293.7 & -1108.76 kJ mol−1 respectively.
Answer» Calculate the standard heat of formation of carbon-di-sulphide(l). Given that the standard heats of combustion of carbon(s), sulphur(s) & carbon disulphide(l) are -393.3, -293.7 & -1108.76 $k J m o l^{- 1}$ respectively.

Discussion

47.	Which of the following is basic structure of cyclic silicate?
Answer» Which of the following is basic structure of cyclic silicate?

Discussion

48.	Why does the sun appears reddish orange during sunset ?
Answer» Why does the sun appears reddish orange during sunset ?

Discussion

49.	What approximate value will come in place of the question mark (?) in the following questions? 69.008% of 699.998+32.99% of 399.999=?
Answer» What approximate value will come in place of the question mark (?) in the following questions? $69.008 % o f 699.998 + 32.99 % o f 399.999 = ?$

Discussion

50.	Q26. Consider the following Statements regarding Indian Systems of Medicine and Homoeopathy: 1. Department of Ayurveda, Yoga and Naturopathy, Unani, Siddha and Homoeopathy (AYUSH) has been elevated to the status of Ministry of AYUSH. 2. Ayurveda, Siddha, Unani and Homoeopathy drugs are outside the purview of Drugs and Cosmetics Act, 1940. Identify the correct statements:
Answer» Q26. Consider the following Statements regarding Indian Systems of Medicine and Homoeopathy: 1. Department of Ayurveda, Yoga and Naturopathy, Unani, Siddha and Homoeopathy (AYUSH) has been elevated to the status of Ministry of AYUSH. 2. Ayurveda, Siddha, Unani and Homoeopathy drugs are outside the purview of Drugs and Cosmetics Act, 1940. Identify the correct statements:

50.

Q26. Consider the following Statements regarding Indian Systems of Medicine and Homoeopathy: 1. Department of Ayurveda, Yoga and Naturopathy, Unani, Siddha and Homoeopathy (AYUSH) has been elevated to the status of Ministry of AYUSH. 2. Ayurveda, Siddha, Unani and Homoeopathy drugs are outside the purview of Drugs and Cosmetics Act, 1940. Identify the correct statements:

Answer»

Q26. Consider the following Statements regarding Indian Systems of Medicine and Homoeopathy:

1. Department of Ayurveda, Yoga and Naturopathy, Unani, Siddha and Homoeopathy (AYUSH) has been elevated to the status of Ministry of AYUSH.

2. Ayurveda, Siddha, Unani and Homoeopathy drugs are outside the purview of Drugs and Cosmetics Act, 1940.

Identify the correct statements:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following elements have positive reduction potential?

If I completely annihilate a hair of your body that has a mass of 1μg then how much energy will I get in the process.

Two identical blocks of iron, one at 10oC and the other at 20oC, are put in contact. Suppose the cooler block cools to 5oC and the warmer block warms to 25oC. This would violate the

Which one of the following does not give a white precipitate with silver nitrate solution?

The value of Δs is negative for the process

In the radioactive disintegration series 232Th90→208Pb82, involving α and β decay, the total number of α and β particles emitted are:

The monomeric unit of terylene are glycol and which of the following

On heating with concetrated NaOH solution in an inert atmosphere of CO2, white phospherous gives a gas. Which of the following statement is incorrect about the gas?

The mobility of metal ions in aqueous medium (Li⊕,Na⊕,K⊕,Rb⊕) in an electric field, follows the order:

The electrical conductance of PtCl4.2NH3 in aqueous solution is.___

Sodium hydroxide is produced on a large scale:

The proteins which are insoluble in water are

When sulphur trioxide gas is dissolved in H2SO4, the product obtained is

The oxidation state of Mo in its oxido-complex species [Mo2O4(C2H4)2(H2O)2]2− is:

A ballon of diameter 21 m weighs 100 kg. Calculate its payload if it is filled with helium at 1.0 atm and 27 ∘C. Density of air is 1.2 kg m−3 (R=0.08 dm3atm K−1mol−1)

Differentiate between minerals' and ores'.

A certain buffer solution contains equal concentration of X− and HX. The Kb for X− is 10−10. The pH of the buffer is: (correct answer +1, wrong answer -0.25)

Predict the order of reactivity of the following compounds in SN1 and SN2 reactions C6H5CH2Br , C6H5CH(C6H5)Br , C6H5CH(CH3)Br , C6H5C(CH3)(C6H5)

The stability of +1 oxidation state increases in the sequence:

The mass ratio of carbon to hydrogen in methane is 3:1. How much hydrogen will it take to react with 36 gms of carbon to form methane?

Determine the following regarding ICl−4 (i) Number of valance electrons in central atom (ii) Number of Ligands (iii) Anionic charge (iv) Cationic charge

Which one of the following orbital is filled first in case of N2?

How crystal solids are classified?write any two examples?

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

Among the following molecules, which contains the maximum number of P−H bonds?

Calculate the number of peroxy linkage(s) in H3PO5.

The smelting of ore in a blast furnace involves, which of the following process /(es)?

The nucleus AZY goes through gamma decay. What shall be the product?

For the gaseous reactions: A(g)⇌3B(g) :KP1and P(g)⇌2Q(g)+R(g); KP2 Occuring in two different vessels at the same temperature, the degree of dissociation of A and P are same when the total equilibrium pressure of gases in both vessels are same. If KP1:KP2 is X:4, then value of "X" is

Not let's try this in 3-D. Calculate r and a relationship from the following figure. If a=x∗r, type x. ___

Arrange the following in order of increasing mass (i) 3.0115×1023 molecules of white phosphorus (P4) (ii) 10 moles of H2 gas (iii) 1 g molecule of anhydrous Na2CO3 (iv) 33.6 L of CO2 gas at S.T.P

Which one of the following would undergo hydrolysis most readily with aqueous sodium hydroxide to form the corresponding hydroxy derivatives?

Consider a M of NH3(aq) is present in a solution containing AgCl and x is the solublity of AgCl in this solution. Given: Kf is the formation constant of [Ag(NH3)2]+, Ksp is the solubility product of AgCl. Which of the following relation is correct.

For the reaction H2 (g) + I2 (g) ⇋ 2HI(g)the equilibrium constant Kp changes with

The heat of neutralisation of a strong acid and a strong alkali is −57.0 kJ mol−1. The heat released when 0.5 mole of HNO3 solution is mixed with 0.2 mole of KOH is:

Why is chlorine and not fluorine the element with the highest electron affinity?

N2O4 dissociates as,N2O4(g)⇌2NO2(g) at 55 oC and 1.2 atmosphere, % decomposition of N2O4 is 50.0%. At what pressure and same temperature, the equilibrium mixture has the ratio of N2O4:NO2 as 1:8? (Report the answer upto two decimal)

Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When CO2 is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A?

Under similar conditions which of the following gases will diffuse four times as quickly as oxygen?

what is the total charge in couloumbs of 72 kg of electron

5 ml of 0.1M Pb(NO3)2 is mixed with 10 ml of 0.02 M KI. The amount of PbI2 precipitated will be about:

What is (X) in the following reaction?

Calculate the number of electrons required to deposit 40.5g of Al.

In the equation H2S+2HNO3→2H2O+2NO2+S, the equivalent weight of hydrogen sulphide is:

Calculate the standard heat of formation of carbon-di-sulphide(l). Given that the standard heats of combustion of carbon(s), sulphur(s) &amp; carbon disulphide(l) are -393.3, -293.7 &amp; -1108.76 kJ mol−1 respectively.

Which of the following is basic structure of cyclic silicate?

Why does the sun appears reddish orange during sunset ?

What approximate value will come in place of the question mark (?) in the following questions? 69.008% of 699.998+32.99% of 399.999=?

Calculate the standard heat of formation of carbon-di-sulphide(l). Given that the standard heats of combustion of carbon(s), sulphur(s) & carbon disulphide(l) are -393.3, -293.7 & -1108.76 kJ mol−1 respectively.