5083 + Interview Questions in Chemistry Page 23 InterviewSolution

1101.	How can we separate a mixture of two immiscible liquids?
Answer» How can we separate a mixture of two immiscible liquids?

Discussion

1102.	Identify the processes A, B and C with respect to the following figure:
Answer» Identify the processes A, B and C with respect to the following figure:

Discussion

1103.	Balance the following equation, and hence choose the values of the coefficients v, w, x, y, z: yHCl(aq)+wMnO2(s)→xMnCl2(aq)+yCl2(g)+zH2O(l)
Answer» Balance the following equation, and hence choose the values of the coefficients v, w, x, y, z: $y H C l (a q) + w M n O_{2} (s) \to x M n C l_{2} (a q) + y C l_{2} (g) + z H_{2} O (l)$

Discussion

1104.	Two methods by which rusting of iron can be prevented are:
Answer» Two methods by which rusting of iron can be prevented are:

Discussion

1105.	van't hoff factor for SrCl2 at 0.01 M is 1.6 Percent dissociation of SrCl2 is
Answer» van't hoff factor for SrCl2 at 0.01 M is 1.6 Percent dissociation of SrCl2 is

Discussion

1106.	30 If enthalpy change defined at constant temperature and pressure then why internal energy not equal to zero
Answer» 30 If enthalpy change defined at constant temperature and pressure then why internal energy not equal to zero

Discussion

1107.	What is an indicator? Give an example.
Answer» What is an indicator? Give an example.

Discussion

1108.	Which of the following complex is the most stable (A)[M(NH3)6]2+ (B)[M(NH3)6]3+ (C)[Men2(NH3)2]3+ (D) [Men3]3+
Answer» Which of the following complex is the most stable (A) ${[M {(N H_{3})}_{6}]}_{6}^{2 +}$ (B) ${[M {(N H_{3})}_{6}]}_{6}^{3 +}$ (C) ${[M e n_{2} {(N H_{3})}_{2}]}_{2}^{3 +}$ (D) ${[M e n_{3}]}_{3}^{3 +}$

1108.

Which of the following complex is the most stable (A)[M(NH3)6]2+ (B)[M(NH3)6]3+ (C)[Men2(NH3)2]3+ (D) [Men3]3+

Answer»

Which of the following complex is the most stable

(A) ${[M {(N H_{3})}_{6}]}_{6}^{2 +}$

(B) ${[M {(N H_{3})}_{6}]}_{6}^{3 +}$

(C) ${[M e n_{2} {(N H_{3})}_{2}]}_{2}^{3 +}$

(D) ${[M e n_{3}]}_{3}^{3 +}$

Discussion

1109.	All noble gas molecules are:
Answer» All noble gas molecules are:

Discussion

1110.	A2b trimerise 40% and dissociate 60%. Find the value of i??
Answer» A2b trimerise 40% and dissociate 60%. Find the value of i??

Discussion

1111.	Zinc sulphate contains 22.65% Zn and 43.9% H2O.If the law of constant proportions is true the mass of Zn required to give 40g of crystal is
Answer» Zinc sulphate contains 22.65% Zn and 43.9% H2O.If the law of constant proportions is true the mass of Zn required to give 40g of crystal is

Discussion

1112.	List the elements that are naturally available for the plants in the forest.
Answer» List the elements that are naturally available for the plants in the forest.

Discussion

1113.

Match the following. Group ‘A’ Group ‘B’ (a) tamarind 1. vinegar (b) yoghurt 2. citric acid (c) lemon 3. tartaric acid (d) acetic acid 4. lactic acid

Answer»

Match the following.

Group ‘A’		Group ‘B’
(a)	tamarind	1.	vinegar
(b)	yoghurt	2.	citric acid
(c)	lemon	3.	tartaric acid
(d)	acetic acid	4.	lactic acid

Discussion

1114.	Question 2Give reasons for the following: (a) Aluminium foils are used to wrap food items. (b) Immersion rods for heating liquids are made up of metallic substances.
Answer» Question 2 Give reasons for the following: (a) Aluminium foils are used to wrap food items. (b) Immersion rods for heating liquids are made up of metallic substances.

1114.

Question 2Give reasons for the following: (a) Aluminium foils are used to wrap food items. (b) Immersion rods for heating liquids are made up of metallic substances.

Answer»

Question 2

Give reasons for the following:

(a) Aluminium foils are used to wrap food items.

(b) Immersion rods for heating liquids are made up of metallic substances.

Discussion

1115.	why and how hydrogen, chlorine and oxygen atoms are the reference for the determination of valency ?
Answer» why and how hydrogen, chlorine and oxygen atoms are the reference for the determination of valency ?

Discussion

1116.	what is double displacement reaction. what is corrosion.
Answer» what is double displacement reaction. what is corrosion.

1116.

what is double displacement reaction. what is corrosion.

Answer»

what is double displacement reaction.

what is corrosion.

Discussion

1117.	Why do we use blue colour solution after washing the clothes ?
Answer» Why do we use blue colour solution after washing the clothes ?

Discussion

1118.	While calculating equivalent mass for a compound undergoing Disproportion reaction, Why cant we calculate n factor directly by taking sum of electrons lost or gained?
Answer» While calculating equivalent mass for a compound undergoing Disproportion reaction, Why cant we calculate n factor directly by taking sum of electrons lost or gained?

Discussion

1119.	During water treatment, in which of the following water sample will you add lime?
Answer» During water treatment, in which of the following water sample will you add lime?

Discussion

1120.	Explain the importance of decomposers in an ecosystem.
Answer» Explain the importance of decomposers in an ecosystem.

Discussion

1121.	Write the name and symbol of the element from the description.a. The atom having the smallest size.b. The atom having the smallest atomic mass.c. The most electronegative atom.d. The noble gas with the smallest atomic radius.e. The most reactive nonmetal.
Answer» Write the name and symbol of the element from the description. a. The atom having the smallest size. b. The atom having the smallest atomic mass. c. The most electronegative atom. d. The noble gas with the smallest atomic radius. e. The most reactive nonmetal.

Discussion

1122.	Which of the following is the crystalline form of carbon?
Answer» Which of the following is the crystalline form of carbon?

Discussion

1123.	88. How much PCl5 must be added to a 1 lit vessel at 250^° c in order to obtain a conc of 0.1 mole of cl2 kc for pcl5 ⇄ pcl3+Cl2 is 0.0414 mol/lit 1)3.415 2)34.15 3)0.03415 4)0.3415
Answer» 88. How much PCl5 must be added to a 1 lit vessel at 250^° c in order to obtain a conc of 0.1 mole of cl2 kc for pcl5 ⇄ pcl3+Cl2 is 0.0414 mol/lit 1)3.415 2)34.15 3)0.03415 4)0.3415

Discussion

1124.	is law of cons†an t proportion is applicable on element of same atomic no
Answer» is law of cons†an t proportion is applicable on element of same atomic no

Discussion

1125.	What type of displacement method is used to collect ammonia?
Answer» What type of displacement method is used to collect ammonia?

Discussion

1126.	Which of the following serves as lungs of our earth?
Answer» Which of the following serves as lungs of our earth?

Discussion

1127.	1. The size of these increase in order mg+2 Na+ f- and Al how
Answer» 1. The size of these increase in order mg+2 Na+ f- and Al how

Discussion

1128.	Branched Link Polymer
Answer» Branched Link Polymer

Discussion

1129.	What do you understand by soil permeability? Explain with a diagram. [2 MARKS]
Answer» What do you understand by soil permeability? Explain with a diagram. [2 MARKS]

Discussion

1130.	97.Match the following regarding nature of the oxides H2O. Basic Na2O. Amphoteric ZnO. Acidic So3. Neutral
Answer» 97.Match the following regarding nature of the oxides H2O. Basic Na2O. Amphoteric ZnO. Acidic So3. Neutral

Discussion

1131.	Which of the following compound is obtained when quicklime reacts with water?
Answer» Which of the following compound is obtained when quicklime reacts with water?

Discussion

1132.	Conductometric titration curve of an equimolar mixture of HCl and HCN with NaOH (aq) can be given as
Answer» Conductometric titration curve of an equimolar mixture of $H C l$ and $H C N$ with $N a O H (a q)$ can be given as

Discussion

1133.	Write a note on sorter’s disease
Answer» Write a note on sorter’s disease

Discussion

1134.	Malavika had it all set for a chemical change to take place. She took Potassium Chlorate on a petri dish and kept it outside exposed to the air on the table for two hours. She knew that potassium placed highest on the reactivity chart will breakdown into its constituent elements when exposed to the atmosphere. However, that did not happen. Can you explain the reason why? [3 MARKS]
Answer» Malavika had it all set for a chemical change to take place. She took Potassium Chlorate on a petri dish and kept it outside exposed to the air on the table for two hours. She knew that potassium placed highest on the reactivity chart will breakdown into its constituent elements when exposed to the atmosphere. However, that did not happen. Can you explain the reason why? [3 MARKS]

Discussion

1135.	Fill in the blanks with the appropriate answers:(i) People obtain groundwater through________ and ________.(ii) Three forms of water are ________, ________ and________. (iii) The water bearing layer of the earth is ________.(iv) The process of water seepage into the ground is called________.
Answer» Fill in the blanks with the appropriate answers: (i) People obtain groundwater through________ and ________. (ii) Three forms of water are ________, ________ and________. (iii) The water bearing layer of the earth is ________. (iv) The process of water seepage into the ground is called________.

Discussion

1136.	The number of electrons required to reduce chromium completely in Cr2O72− to Cr3+ in acidic medium, is
Answer» The number of electrons required to reduce chromium completely in Cr $_{2}$ O $_{7}$ $^{2 -}$ to Cr $^{3 +}$ in acidic medium, is

Discussion

1137.	Which of the following will react with base to undergo a neutralisation reaction?
Answer» Which of the following will react with base to undergo a neutralisation reaction?

Discussion

1138.	What is the difference between percolation and absorption?
Answer» What is the difference between percolation and absorption?

Discussion

1139.	Are the terms particle and molecules same ?
Answer» Are the terms particle and molecules same ?

Discussion

1140.	Question 1 Fill in the blanks: (a) Cleaning of water is a process of removing __. (b) Wastewater released by houses is called __. (c) Dried __ is used as manure. (d) Drains get blocked by __ and __.
Answer» Question 1 Fill in the blanks: (a) Cleaning of water is a process of removing __. (b) Wastewater released by houses is called __. (c) Dried __ is used as manure. (d) Drains get blocked by __ and __.

Discussion

1141.	The value of 10N in CGS unit will be
Answer» The value of 10N in CGS unit will be

Discussion

1142.	2.Why is primary valency considered non directional
Answer» 2.Why is primary valency considered non directional

Discussion

1143.	The half-life period of a radio active element is 140 days. After 560 days, one gram of the element will reduce to:
Answer» The half-life period of a radio active element is $140$ days. After $560$ days, one gram of the element will reduce to:

Discussion

1144.	Question 5 Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size. Rock, Clay, Sand, Gravel, Silt
Answer» Question 5 Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size. $\begin{matrix} R o c k, C l a y, S a n d, G r a v e l, S i l t \end{matrix}$

1144.

Question 5 Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size. Rock, Clay, Sand, Gravel, Silt

Answer»

Question 5

Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size.
$\begin{matrix} R o c k, C l a y, S a n d, G r a v e l, S i l t \end{matrix}$

Discussion

1145.	Air is transparent because:
Answer» Air is transparent because:

Discussion

1146.	13.The decay constant of a radio isotope is n. if A1 and A2 are it's activities at time T1 and T2 respectively,the number of nuclei which have decayed during the (T1-T2) is? A1T1-A2T2 A1-A2 (A1-A2)/n n(A1-A2)
Answer» 13.The decay constant of a radio isotope is n. if A1 and A2 are it's activities at time T1 and T2 respectively,the number of nuclei which have decayed during the (T1-T2) is? A1T1-A2T2 A1-A2 (A1-A2)/n n(A1-A2)

Discussion

1147.	Analyse the elements given below and identify ‘X’ if the given elements are forming Dobereiner's triad.Li (6.9), Na (X), K (39.0)
Answer» Analyse the elements given below and identify ‘X’ if the given elements are forming Dobereiner's triad. Li (6.9), Na (X), K (39.0)

Discussion

1148.	12. Assertion: molar mass of a volatile organic compound is determined by Victor meyer's method reason: molar mass of a non volatile organic compound is determined by ebullioscopy
Answer» 12. Assertion: molar mass of a volatile organic compound is determined by Victor meyer's method reason: molar mass of a non volatile organic compound is determined by ebullioscopy

Discussion

1149.	Give answersa. Which acid is used for getting chloride salt ?b. By squizzing lemon on a piece of rock the gas liberated turned lime water milky. which compound is present in the rock ?c. The label on the bottle of chemical is spoiled. How will you find whether the chemical is acidic or not ?
Answer» Give answers a. Which acid is used for getting chloride salt ? b. By squizzing lemon on a piece of rock the gas liberated turned lime water milky. which compound is present in the rock ? c. The label on the bottle of chemical is spoiled. How will you find whether the chemical is acidic or not ?

Discussion

1150.	Explain the different zones observed in a candle flame. Which one of them is the hottest zone?
Answer» Explain the different zones observed in a candle flame. Which one of them is the hottest zone?

Discussion

Explore topic-wise InterviewSolutions in .

How can we separate a mixture of two immiscible liquids?

Identify the processes A, B and C with respect to the following figure:

Balance the following equation, and hence choose the values of the coefficients v, w, x, y, z: yHCl(aq)+wMnO2(s)→xMnCl2(aq)+yCl2(g)+zH2O(l)

Two methods by which rusting of iron can be prevented are:

van't hoff factor for SrCl2 at 0.01 M is 1.6 Percent dissociation of SrCl2 is

30 If enthalpy change defined at constant temperature and pressure then why internal energy not equal to zero

What is an indicator? Give an example.

Which of the following complex is the most stable (A)[M(NH3)6]2+ (B)[M(NH3)6]3+ (C)[Men2(NH3)2]3+ (D) [Men3]3+

All noble gas molecules are:

A2b trimerise 40% and dissociate 60%. Find the value of i??

Zinc sulphate contains 22.65% Zn and 43.9% H2O.If the law of constant proportions is true the mass of Zn required to give 40g of crystal is

List the elements that are naturally available for the plants in the forest.

Match the following. Group ‘A’ Group ‘B’ (a) tamarind 1. vinegar (b) yoghurt 2. citric acid (c) lemon 3. tartaric acid (d) acetic acid 4. lactic acid

Question 2Give reasons for the following: (a) Aluminium foils are used to wrap food items. (b) Immersion rods for heating liquids are made up of metallic substances.

why and how hydrogen, chlorine and oxygen atoms are the reference for the determination of valency ?

what is double displacement reaction. what is corrosion.

Why do we use blue colour solution after washing the clothes ?

While calculating equivalent mass for a compound undergoing Disproportion reaction, Why cant we calculate n factor directly by taking sum of electrons lost or gained?

During water treatment, in which of the following water sample will you add lime?

Explain the importance of decomposers in an ecosystem.

Write the name and symbol of the element from the description.a. The atom having the smallest size.b. The atom having the smallest atomic mass.c. The most electronegative atom.d. The noble gas with the smallest atomic radius.e. The most reactive nonmetal.

Which of the following is the crystalline form of carbon?

88. How much PCl5 must be added to a 1 lit vessel at 250^° c in order to obtain a conc of 0.1 mole of cl2 kc for pcl5 ⇄ pcl3+Cl2 is 0.0414 mol/lit 1)3.415 2)34.15 3)0.03415 4)0.3415

is law of cons†an t proportion is applicable on element of same atomic no

What type of displacement method is used to collect ammonia?

Which of the following serves as lungs of our earth?

1. The size of these increase in order mg+2 Na+ f- and Al how

Branched Link Polymer

What do you understand by soil permeability? Explain with a diagram. [2 MARKS]

97.Match the following regarding nature of the oxides H2O. Basic Na2O. Amphoteric ZnO. Acidic So3. Neutral

Which of the following compound is obtained when quicklime reacts with water?

Conductometric titration curve of an equimolar mixture of HCl and HCN with NaOH (aq) can be given as

Write a note on sorter’s disease

The number of electrons required to reduce chromium completely in Cr2O72− to Cr3+ in acidic medium, is

Which of the following will react with base to undergo a neutralisation reaction?

What is the difference between percolation and absorption?

Are the terms particle and molecules same ?

Question 1 Fill in the blanks: (a) Cleaning of water is a process of removing __. (b) Wastewater released by houses is called __. (c) Dried __ is used as manure. (d) Drains get blocked by __ and __.

The value of 10N in CGS unit will be

2.Why is primary valency considered non directional

The half-life period of a radio active element is 140 days. After 560 days, one gram of the element will reduce to:

Question 5 Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size. Rock, Clay, Sand, Gravel, Silt

Air is transparent because:

13.The decay constant of a radio isotope is n. if A1 and A2 are it's activities at time T1 and T2 respectively,the number of nuclei which have decayed during the (T1-T2) is? A1T1-A2T2 A1-A2 (A1-A2)/n n(A1-A2)

Analyse the elements given below and identify ‘X’ if the given elements are forming Dobereiner's triad.Li (6.9), Na (X), K (39.0)

12. Assertion: molar mass of a volatile organic compound is determined by Victor meyer's method reason: molar mass of a non volatile organic compound is determined by ebullioscopy

Give answersa. Which acid is used for getting chloride salt ?b. By squizzing lemon on a piece of rock the gas liberated turned lime water milky. which compound is present in the rock ?c. The label on the bottle of chemical is spoiled. How will you find whether the chemical is acidic or not ?

Explain the different zones observed in a candle flame. Which one of them is the hottest zone?

Question 1 Fill in the blanks: (a) Cleaning of water is a process of removing . (b) Wastewater released by houses is called . (c) Dried is used as manure. (d) Drains get blocked by and __.