15280 + Interview Questions in Chemistry Page 22 InterviewSolution

1051.	What is the formula for calculating the % composition of the metal in a sample??
Answer» What is the formula for calculating the % composition of the metal in a sample??

Discussion

1052.	Choose the unsaturated compound(s) from the following.
Answer» Choose the unsaturated compound(s) from the following.

Discussion

1053.	You are supplied with five solutions : A, B, C, D and E with pH values as follows: A = 1.8, B = 7, C = 8.5, D = 13, and E = 5 Classify these solutions as neutral, slightly or strongly acidic and slightly or strongly alkaline. Which solution would be most likely to liberate hydrogen with : (a) magnesium poweder, (b) powdered zinc metal. Give a word equation for each reaction.
Answer» You are supplied with five solutions : A, B, C, D and E with $p^{H}$ values as follows: A = 1.8, B = 7, C = 8.5, D = 13, and E = 5 Classify these solutions as neutral, slightly or strongly acidic and slightly or strongly alkaline. Which solution would be most likely to liberate hydrogen with : (a) magnesium poweder, (b) powdered zinc metal. Give a word equation for each reaction.

1053.

You are supplied with five solutions : A, B, C, D and E with pH values as follows: A = 1.8, B = 7, C = 8.5, D = 13, and E = 5 Classify these solutions as neutral, slightly or strongly acidic and slightly or strongly alkaline. Which solution would be most likely to liberate hydrogen with : (a) magnesium poweder, (b) powdered zinc metal. Give a word equation for each reaction.

Answer»

You are supplied with five solutions : A, B, C, D and E with $p^{H}$ values as follows:

A = 1.8, B = 7, C = 8.5, D = 13, and E = 5

Classify these solutions as neutral, slightly or strongly acidic and slightly or strongly alkaline.

Which solution would be most likely to liberate hydrogen with :

(a) magnesium poweder,

(b) powdered zinc metal. Give a word equation for each reaction.

Discussion

1054.	Fill in the blanks from the choices given below:(i) Across a period, the ionisation potential __________ (increases, decreases, remains same).(ii) Down the group, electron affinity _________ (increases, decreases, remains same).
Answer» Fill in the blanks from the choices given below: (i) Across a period, the ionisation potential __________ (increases, decreases, remains same). (ii) Down the group, electron affinity _________ (increases, decreases, remains same).

Discussion

1055.	What is the difference between Diamond and Graphite?
Answer» What is the difference between Diamond and Graphite?

Discussion

1056.	58.No of pie bond in nh3
Answer» 58.No of pie bond in nh3

Discussion

1057.	On a ship sailing in the Pacific ocean, where the temperature is 23.4∘C, a balloon is filled with 2 L air. What will be the volume of the balloon when the ship reaches the Indian ocean where the temperature is 26.1∘ C?
Answer» On a ship sailing in the Pacific ocean, where the temperature is 23.4 $^{\circ}$ C, a balloon is filled with 2 L air. What will be the volume of the balloon when the ship reaches the Indian ocean where the temperature is 26.1 $^{\circ}$ C?

Discussion

1058.	State whether the following statements are true or false : (a) Newlands divided the elements into horizontal rows of eight elements each. (b) According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic numbers. (c) The elements in a group have consecutive atomic numbers.
Answer» State whether the following statements are true or false : (a) Newlands divided the elements into horizontal rows of eight elements each. (b) According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic numbers. (c) The elements in a group have consecutive atomic numbers.

1058.

State whether the following statements are true or false : (a) Newlands divided the elements into horizontal rows of eight elements each. (b) According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic numbers. (c) The elements in a group have consecutive atomic numbers.

Answer»

State whether the following statements are true or false :

(a) Newlands divided the elements into horizontal rows of eight elements each.

(b) According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic numbers.

(c) The elements in a group have consecutive atomic numbers.

Discussion

1059.	Is the ethyne carbanion more stable than benzylic and allylic carbanion?
Answer» Is the ethyne carbanion more stable than benzylic and allylic carbanion?

Discussion

1060.	State the modern periodic law.
Answer» State the modern periodic law.

Discussion

1061.	HCl + NaOH ----------> NaCl + H2O is neutralization reactio but is it a double displacement reaction? If yes then why?
Answer» HCl + NaOH ----------> NaCl + H2O is neutralization reactio but is it a double displacement reaction? If yes then why?

Discussion

1062.	A ball of mass m falls freely from rest. Whenit has reached a speed v, it strikes a vertical spring. The spring is compressed by distance y before the ball moves upwards again. Assume that all the energy the ball loses becomes elastic potential energy in the spring. What is the average force exerted by the spring during its compression ?
Answer» A ball of mass m falls freely from rest. Whenit has reached a speed v, it strikes a vertical spring. The spring is compressed by distance y before the ball moves upwards again. Assume that all the energy the ball loses becomes elastic potential energy in the spring. What is the average force exerted by the spring during its compression ?

Discussion

1063.	(a) Give the names and formulae of one metal chloride and one non-metal chloride. (b) State an important property in which these metal chloride and non-metal chloride differ. (c) Why do they differ in this property?
Answer» (a) Give the names and formulae of one metal chloride and one non-metal chloride. (b) State an important property in which these metal chloride and non-metal chloride differ. (c) Why do they differ in this property?

Discussion

1064.	Which of the following gases produce dense white fumes on reacting with ammonia gas?
Answer» Which of the following gases produce dense white fumes on reacting with ammonia gas?

Discussion

1065.	Draw all the possible confirmations of butane and arrange them in the order of their stability.
Answer» Draw all the possible confirmations of butane and arrange them in the order of their stability.

Discussion

1066.	Match the functional groups with their general notation.
Answer» Match the functional groups with their general notation.

Discussion

1067.	What is hybridisation explain with diagram of ethyne
Answer» What is hybridisation explain with diagram of ethyne

Discussion

1068.	The size of isoelectronic species F⊖, Ne and Na⊕ is affected by
Answer» The size of isoelectronic species $F^{⊖}$ , $N e$ and $N a^{\oplus}$ is affected by

Discussion

1069.	Which of the following is not a Döbereiner’s triads? [Given: Atomic mass of elements:Li=6.9, N=14, Na=23, P=31, Cl=35, K=39Ca=40, As=74.9, Br=79.9, Sr=87.6, I=126.9,Ba=137.3]
Answer» Which of the following is not a Döbereiner’s triads? $[Given: Atomic mass of elements : L i = 6.9, N = 14, N a = 23, P = 31, C l = 35, K = 39 C a = 40, A s = 74.9, B r = 79.9, S r = 87.6, I = 126.9, B a = 137.3]$

Discussion

1070.	78 The pH of 10 to the power -3 Mol. Mono acidic base , if it is 1% ionised is 1) 5 2) 8 3) 3 4) 9
Answer» 78 The pH of 10 to the power -3 Mol. Mono acidic base , if it is 1% ionised is 1) 5 2) 8 3) 3 4) 9

Discussion

1071.	33. Carbon has 4 atoms in the last shell. Will it lose 4 atoms or gain 4 atoms?write it's valecy?
Answer» 33. Carbon has 4 atoms in the last shell. Will it lose 4 atoms or gain 4 atoms?write it's valecy?

Discussion

1072.	Which structure is related to benzoin?
Answer» Which structure is related to benzoin?

Discussion

1073.	Question 8.4Write the balanced chemical equation for the following and identify the type of reaction:Magnesium (s) + Hydrochloric acid (aq) → Magnesium chloride (aq) + Hydrogen (g)
Answer» Question 8.4 Write the balanced chemical equation for the following and identify the type of reaction: Magnesium (s) + Hydrochloric acid (aq) $\to$ Magnesium chloride (aq) + Hydrogen (g)

Discussion

1074.	Answer the following questions by ticking the correct options. (a) The poem is set in ____________________________________________ the wilderness an ancient land a palace a desert (b) The expression on the face of the statue is one of ____________________ admiration anger despair contempt (c) This poem throws light on the _________________ nature of Ozymandias. cruel arrogant boastful aggressive (d) The sculptor was able to understand Ozymandias' ___________________ words expression feelings ambition (e) The tone of the poem is ________________________________________ mocking nostalgic gloomy gloating
Answer» Answer the following questions by ticking the correct options. (a) The poem is set in ____________________________________________ the wilderness an ancient land a palace a desert (b) The expression on the face of the statue is one of ____________________ admiration anger despair contempt (c) This poem throws light on the _________________ nature of Ozymandias. cruel arrogant boastful aggressive (d) The sculptor was able to understand Ozymandias' ___________________ words expression feelings ambition (e) The tone of the poem is ________________________________________ mocking nostalgic gloomy gloating

1074.

Answer the following questions by ticking the correct options. (a) The poem is set in ________________________________ the wilderness an ancient land a palace a desert (b) The expression on the face of the statue is one of admiration anger despair contempt (c) This poem throws light on the _ nature of Ozymandias. cruel arrogant boastful aggressive (d) The sculptor was able to understand Ozymandias' _ words expression feelings ambition (e) The tone of the poem is ______________________________ mocking nostalgic gloomy gloating

Answer»

Answer
the following questions by ticking the correct options.

(a)
The poem is set in ____________________________________________

the
wilderness
an
ancient land
a
palace
a
desert

(b)
The expression on the face of the statue is one of
____________________

admiration
anger
despair
contempt

(c)
This poem throws light on the _________________ nature of Ozymandias.

cruel
arrogant
boastful
aggressive

(d)
The sculptor was able to understand Ozymandias' ___________________

words
expression
feelings
ambition

(e)
The tone of the poem is ________________________________________

mocking
nostalgic
gloomy
gloating

Discussion

1075.	what is polyatomic and diatomic molecules ?
Answer» what is polyatomic and diatomic molecules ?

Discussion

1076.	X and Y are the two extreme elements of the series which obey Newland's law of octaves. How many elements are there in between X and Y?
Answer» X and Y are the two extreme elements of the series which obey Newland's law of octaves. How many elements are there in between X and Y?

Discussion

1077.	Hg Cl2 and I2 disolve in water containing iodide ions . Identify the ions which exist in the 'solution'
Answer» Hg Cl2 and I2 disolve in water containing iodide ions . Identify the ions which exist in the 'solution'

Discussion

1078.	What is a Biotic factor
Answer» What is a Biotic factor

Discussion

1079.	(a) Write a balanced equation for the reaction of zinc and dilute hydrochloric acid.(b) State what is observed when hydrochloric acid is added to silver nitrate solution.
Answer» (a) Write a balanced equation for the reaction of zinc and dilute hydrochloric acid. (b) State what is observed when hydrochloric acid is added to silver nitrate solution.

Discussion

1080.	The precipitate formed by mixing silver nitrate and sodium chloride solution disappear on adding ethyl amine.It is due to the formation of (1) C2H5CI (2) C2H5NO2 (3)\lbrack Ag(C2H5NH2)2\rbrack Cl (4) CH3COCl
Answer» The precipitate formed by mixing silver nitrate and sodium chloride solution disappear on adding ethyl amine.It is due to the formation of (1) C2H5CI (2) C2H5NO2 (3)\lbrack Ag(C2H5NH2)2\rbrack Cl (4) CH3COCl

Discussion

1081.	Choosing the correct words given in brackets, complete the sentences given below:(i) An acid is a compound which, when dissolved in water gives ________ (hydronium/hydroxide) ions as the only _________ (positive/negative) ions.(ii) A(n) _________ (acid/basic) salt is one in which the hydrogen of an acid has been partially replaced by a _________ (metal, non-metal).
Answer» Choosing the correct words given in brackets, complete the sentences given below: (i) An acid is a compound which, when dissolved in water gives ________ (hydronium/hydroxide) ions as the only _________ (positive/negative) ions. (ii) A(n) _________ (acid/basic) salt is one in which the hydrogen of an acid has been partially replaced by a _________ (metal, non-metal).

Discussion

1082.	60.Assuming no change in volume, the time required to obtain a pH of 12 by electrolysis of 50ml 0.1M NaCl (using current of 0.5 amp) will be
Answer» 60.Assuming no change in volume, the time required to obtain a pH of 12 by electrolysis of 50ml 0.1M NaCl (using current of 0.5 amp) will be

Discussion

1083.	(a) If 112 cm3 of hydrogen sulphide is mixed with 120 cm3 of chlorine at STP, what is the mass of sulphur formed?H2S + Cl2 → 2HCl + S(b) Washing soda has the formula Na2CO3·10H2O. What is the mass of anhydrous sodium carbonate left when all the water of crystallization is expelled by heating 57.2 g of washing soda?(c) When excess lead nitrate solution was added to a solution of sodium sulphate, 15.1 g of lead sulphate was precipitated. What mass of sodium sulphate was present in the original solution?Na2SO4 + Pb(NO3)2 → PbSO4 + 2NaNO3(H = 1; C = 12; O = 16; Na = 23; S = 32; Pb = 207)
Answer» (a) If 112 cm³ of hydrogen sulphide is mixed with 120 cm³ of chlorine at STP, what is the mass of sulphur formed? H₂S + Cl₂ $\overset{}{\to}$ 2HCl + S (b) Washing soda has the formula Na₂CO₃·10H₂O. What is the mass of anhydrous sodium carbonate left when all the water of crystallization is expelled by heating 57.2 g of washing soda? (c) When excess lead nitrate solution was added to a solution of sodium sulphate, 15.1 g of lead sulphate was precipitated. What mass of sodium sulphate was present in the original solution? Na₂SO₄ + Pb(NO₃)₂ $\overset{}{\to}$ PbSO₄ + 2NaNO₃ (H = 1; C = 12; O = 16; Na = 23; S = 32; Pb = 207)

Discussion

1084.	Element A has a face centred unit cell in which A is absent from half of the face centres. The packing fraction is x×√2π96.The value of x is :
Answer» Element A has a face centred unit cell in which A is absent from half of the face centres. The packing fraction is $\frac{x \times \sqrt{2} π}{96}$ . The value of x is :

Discussion

1085.	What will be the balanced equation of Al +HCl -->AlCl3 + H2 ?
Answer» What will be the balanced equation of Al +HCl -->AlCl3 + H2 ?

Discussion

1086.	Which of the following is incorrect about a basic solution?
Answer» Which of the following is incorrect about a basic solution?

Discussion

1087.	(a) How many electrons do inert gases have in their valence shells? (b) Name an element of group 18 which can form compounds.
Answer» (a) How many electrons do inert gases have in their valence shells? (b) Name an element of group 18 which can form compounds.

1087.

(a) How many electrons do inert gases have in their valence shells? (b) Name an element of group 18 which can form compounds.

Answer»

(a) How many electrons do inert gases have in their valence shells?

(b) Name an element of group 18 which can form compounds.

Discussion

1088.	Balance the following and identify the reaction Silver Bromide on exposure to sunlight decomposes into silver and bromine
Answer» Balance the following and identify the reaction Silver Bromide on exposure to sunlight decomposes into silver and bromine

1088.

Balance the following and identify the reaction Silver Bromide on exposure to sunlight decomposes into silver and bromine

Answer»

Balance the following and identify the reaction

Silver Bromide on exposure to sunlight decomposes into silver and bromine

Discussion

1089.	How can Mg be burnt in prescence of CO2 and give MgO+C
Answer» How can Mg be burnt in prescence of CO2 and give MgO+C

Discussion

1090.	What is the nature of the oxides formed by s block elements?
Answer» What is the nature of the oxides formed by s block elements?

Discussion

1091.	100 mL of 1 M KMnO4 oxidised 100 mL H2O2 in acidic. Calculate the volume of same KMnO4 required in alkaline medium to oxidise 100 mL of H2O2 of same concentration
Answer» 100 mL of 1 M KMnO4 oxidised 100 mL H2O2 in acidic. Calculate the volume of same KMnO4 required in alkaline medium to oxidise 100 mL of H2O2 of same concentration

Discussion

1092.	25 Among the following the one which reacts most readily with ethanol is 1. p-nitrobenzyl bromide 2. p-chlorobenzyl bromide 3. p-methoxybenzyl bromide 4. p-methylbenzyl bromide
Answer» 25 Among the following the one which reacts most readily with ethanol is 1. p-nitrobenzyl bromide 2. p-chlorobenzyl bromide 3. p-methoxybenzyl bromide 4. p-methylbenzyl bromide

Discussion

1093.	Which of the following is/are not compressible?
Answer» Which of the following is/are not compressible?

Discussion

1094.	An organic compound 'A' is widely used as a preservative in pickles and has a molecular formula C2H4O2. This compound reacts with ethanol to form a sweet smelling compound 'B'.(i) Identify the compound 'A'.(ii) Write the chemical equation for its reaction with ethanol to form compound 'B'.(iii) How can we get compound 'A' back from 'B'?(iv) Name the process and write corresponding chemical equation.(v) Which gas is produced when compound 'A' reacts with washing soda? Write the chemical equation.
Answer» An organic compound 'A' is widely used as a preservative in pickles and has a molecular formula C₂H₄O₂. This compound reacts with ethanol to form a sweet smelling compound 'B'. (i) Identify the compound 'A'. (ii) Write the chemical equation for its reaction with ethanol to form compound 'B'. (iii) How can we get compound 'A' back from 'B'? (iv) Name the process and write corresponding chemical equation. (v) Which gas is produced when compound 'A' reacts with washing soda? Write the chemical equation.

Discussion

1095.	Which of the following are not decomposition reactions?
Answer» Which of the following are not decomposition reactions?

Discussion

1096.	A sample of ammonium phosphate contains 3.18 moles of hydrogen atoms. What is the number of moles of oxygen atoms in the sample?
Answer» A sample of ammonium phosphate contains 3.18 moles of hydrogen atoms. What is the number of moles of oxygen atoms in the sample?

Discussion

1097.	Select the correct statement in the followingIf ΔGsystem < 0, then process is non-spontaneousIf ΔSsystem > 0, then process must be spontaneousIf ΔStotal > 0, then process must be spontaneousIf ΔHsystem > 0, then process must be spontaneous
Answer» Select the correct statement in the following If ΔGsystem < 0, then process is non-spontaneous If ΔSsystem > 0, then process must be spontaneous If ΔStotal > 0, then process must be spontaneous If ΔHsystem > 0, then process must be spontaneous

Discussion

1098.	how does a charge q oscillating at certain frequency produce electromagnets wave? sketch a schematic diagram depicting electric and magnetic field for na EM wave propogating along z-axis?
Answer» how does a charge q oscillating at certain frequency produce electromagnets wave? sketch a schematic diagram depicting electric and magnetic field for na EM wave propogating along z-axis?

Discussion

1099.	Differentiate between Reproduction and Regeneration.
Answer» Differentiate between Reproduction and Regeneration.

Discussion

1100.	The ratio of vapour density of two gases is 4:9 at the same temperature. Compare the r.m.s velocities of their molecules.
Answer» The ratio of vapour density of two gases is 4:9 at the same temperature. Compare the r.m.s velocities of their molecules.

Discussion

Explore topic-wise InterviewSolutions in .

What is the formula for calculating the % composition of the metal in a sample??

Choose the unsaturated compound(s) from the following.

Fill in the blanks from the choices given below:(i) Across a period, the ionisation potential __________ (increases, decreases, remains same).(ii) Down the group, electron affinity _________ (increases, decreases, remains same).

What is the difference between Diamond and Graphite?

58.No of pie bond in nh3

On a ship sailing in the Pacific ocean, where the temperature is 23.4∘C, a balloon is filled with 2 L air. What will be the volume of the balloon when the ship reaches the Indian ocean where the temperature is 26.1∘ C?

Is the ethyne carbanion more stable than benzylic and allylic carbanion?

State the modern periodic law.

HCl + NaOH ----------> NaCl + H2O is neutralization reactio but is it a double displacement reaction? If yes then why?

(a) Give the names and formulae of one metal chloride and one non-metal chloride. (b) State an important property in which these metal chloride and non-metal chloride differ. (c) Why do they differ in this property?

Which of the following gases produce dense white fumes on reacting with ammonia gas?

Draw all the possible confirmations of butane and arrange them in the order of their stability.

Match the functional groups with their general notation.

What is hybridisation explain with diagram of ethyne

The size of isoelectronic species F⊖, Ne and Na⊕ is affected by

Which of the following is not a Döbereiner’s triads? [Given: Atomic mass of elements:Li=6.9, N=14, Na=23, P=31, Cl=35, K=39Ca=40, As=74.9, Br=79.9, Sr=87.6, I=126.9,Ba=137.3]

78 The pH of 10 to the power -3 Mol. Mono acidic base , if it is 1% ionised is 1) 5 2) 8 3) 3 4) 9

33. Carbon has 4 atoms in the last shell. Will it lose 4 atoms or gain 4 atoms?write it's valecy?

Which structure is related to benzoin?

Question 8.4Write the balanced chemical equation for the following and identify the type of reaction:Magnesium (s) + Hydrochloric acid (aq) → Magnesium chloride (aq) + Hydrogen (g)

what is polyatomic and diatomic molecules ?

X and Y are the two extreme elements of the series which obey Newland's law of octaves. How many elements are there in between X and Y?

Hg Cl2 and I2 disolve in water containing iodide ions . Identify the ions which exist in the 'solution'

What is a Biotic factor

(a) Write a balanced equation for the reaction of zinc and dilute hydrochloric acid.(b) State what is observed when hydrochloric acid is added to silver nitrate solution.

The precipitate formed by mixing silver nitrate and sodium chloride solution disappear on adding ethyl amine.It is due to the formation of (1) C2H5CI (2) C2H5NO2 (3)\lbrack Ag(C2H5NH2)2\rbrack Cl (4) CH3COCl

60.Assuming no change in volume, the time required to obtain a pH of 12 by electrolysis of 50ml 0.1M NaCl (using current of 0.5 amp) will be

Element A has a face centred unit cell in which A is absent from half of the face centres. The packing fraction is x×√2π96.The value of x is :

What will be the balanced equation of Al +HCl --&gt;AlCl3 + H2 ?

Which of the following is incorrect about a basic solution?

(a) How many electrons do inert gases have in their valence shells? (b) Name an element of group 18 which can form compounds.

Balance the following and identify the reaction Silver Bromide on exposure to sunlight decomposes into silver and bromine

How can Mg be burnt in prescence of CO2 and give MgO+C

What is the nature of the oxides formed by s block elements?

100 mL of 1 M KMnO4 oxidised 100 mL H2O2 in acidic. Calculate the volume of same KMnO4 required in alkaline medium to oxidise 100 mL of H2O2 of same concentration

25 Among the following the one which reacts most readily with ethanol is 1. p-nitrobenzyl bromide 2. p-chlorobenzyl bromide 3. p-methoxybenzyl bromide 4. p-methylbenzyl bromide

Which of the following is/are not compressible?

Which of the following are not decomposition reactions?

A sample of ammonium phosphate contains 3.18 moles of hydrogen atoms. What is the number of moles of oxygen atoms in the sample?

Select the correct statement in the followingIf ΔGsystem < 0, then process is non-spontaneousIf ΔSsystem > 0, then process must be spontaneousIf ΔStotal > 0, then process must be spontaneousIf ΔHsystem > 0, then process must be spontaneous

how does a charge q oscillating at certain frequency produce electromagnets wave? sketch a schematic diagram depicting electric and magnetic field for na EM wave propogating along z-axis?

Differentiate between Reproduction and Regeneration.

The ratio of vapour density of two gases is 4:9 at the same temperature. Compare the r.m.s velocities of their molecules.

Fill in the blanks from the choices given below:(i) Across a period, the ionisation potential __ (increases, decreases, remains same).(ii) Down the group, electron affinity _ (increases, decreases, remains same).

What will be the balanced equation of Al +HCl -->AlCl3 + H2 ?