15280 + Interview Questions in Chemistry Page 295 InterviewSolution

14701.	Which is more dangerous - a concentrated acid or a strong acid ?
Answer» Which is more dangerous - a concentrated acid or a strong acid ?

Discussion

14702.	Name one substance which acts as both oxidising as well as reducing agent
Answer» Name one substance which acts as both oxidising as well as reducing agent

Discussion

14703.	Take about 2g barium hydroxide in a test tube add 1g of ammonium chloride and mix with help of a glass rod touch the bottom of test tube, is this an exothermic or endothermic reaction
Answer» Take about 2g barium hydroxide in a test tube add 1g of ammonium chloride and mix with help of a glass rod touch the bottom of test tube, is this an exothermic or endothermic reaction

Discussion

14704.	Which of the following gas brings tears to eyes?
Answer» Which of the following gas brings tears to eyes?

Discussion

14705.	Why alkane series is formed by replacing one H atom of an alkane by CH3 group?
Answer» Why alkane series is formed by replacing one H atom of an alkane by CH3 group?

Discussion

14706.	Why methane can't be methene or methyne?
Answer» Why methane can't be methene or methyne?

Discussion

14707.	Why does corrosion always happen layer by layer?
Answer» Why does corrosion always happen layer by layer?

Discussion

14708.	What are the types of decomposition reaction, give example for each
Answer» What are the types of decomposition reaction, give example for each

Discussion

14709.	Name the product formed when hydrogen is added to ethene.
Answer» Name the product formed when hydrogen is added to ethene.

Discussion

14710.	In Van der Waal's equation of state of the gas law, the constant 'b' is a measure of
Answer» In Van der Waal's equation of state of the gas law, the constant 'b' is a measure of

Discussion

14711.	Xenon is a inert gas. So why it react with fluorine and oxygen .
Answer» Xenon is a inert gas. So why it react with fluorine and oxygen .

Discussion

14712.	Represent A – (A – B ) using a Venn diagram
Answer» Represent A – (A – B ) using a Venn diagram

Discussion

14713.	A volatile acid X is formed when sodium chloride reacts with concentrated sulphuric acid. Name this volatile acid.
Answer» A volatile acid X is formed when sodium chloride reacts with concentrated sulphuric acid. Name this volatile acid.

Discussion

14714.	Match the following ColumnAColumnB 1. {x:x is an odd natural number} a. {12,13,23,34,35,57} 2.{x:x=n2,n∈N and x<100} b. {1,4,9,16,25,........10000} 3.{x:x=nn+2,where n is a natural number and 1≤n≤6} c. {1,4,9,16,25,36,49,64,81} 4. {x:x is a letter of the word TRIGONOMETRY} d. {G,E,I,M,N,O,R,T,Y} e. {1,3,5,7,9,...............}
Answer» Match the following $\begin{matrix} C o l u m n A & C o l u m n B 1. {x : x i s a n o d d n a t u r a l n u m b e r} & a . {\frac{1}{2}, \frac{1}{3}, \frac{2}{3}, \frac{3}{4}, \frac{3}{5}, \frac{5}{7}} 2. {x : x = n^{2}, n \in N a n d x < 100} & b . {1, 4, 9, 16, 25, . . . . . . . .10000} 3. {x : x = \frac{n}{n + 2}, w h e r e n i s a n a t u r a l n u m b e r a n d 1 \leq n \leq 6} & c . {1, 4, 9, 16, 25, 36, 49, 64, 81} 4. {x : x i s a l e t t e r o f t h e w o r d T R I G O N O M E T R Y} & d . {G, E, I, M, N, O, R, T, Y} e . {1, 3, 5, 7, 9, . . . . . . . . . . . . . . .} \end{matrix}$

14714.

Match the following ColumnAColumnB 1. {x:x is an odd natural number} a. {12,13,23,34,35,57} 2.{x:x=n2,n∈N and x<100} b. {1,4,9,16,25,........10000} 3.{x:x=nn+2,where n is a natural number and 1≤n≤6} c. {1,4,9,16,25,36,49,64,81} 4. {x:x is a letter of the word TRIGONOMETRY} d. {G,E,I,M,N,O,R,T,Y} e. {1,3,5,7,9,...............}

Answer»

Match the following

$\begin{matrix} C o l u m n A & C o l u m n B 1. {x : x i s a n o d d n a t u r a l n u m b e r} & a . {\frac{1}{2}, \frac{1}{3}, \frac{2}{3}, \frac{3}{4}, \frac{3}{5}, \frac{5}{7}} 2. {x : x = n^{2}, n \in N a n d x < 100} & b . {1, 4, 9, 16, 25, . . . . . . . .10000} 3. {x : x = \frac{n}{n + 2}, w h e r e n i s a n a t u r a l n u m b e r a n d 1 \leq n \leq 6} & c . {1, 4, 9, 16, 25, 36, 49, 64, 81} 4. {x : x i s a l e t t e r o f t h e w o r d T R I G O N O M E T R Y} & d . {G, E, I, M, N, O, R, T, Y} e . {1, 3, 5, 7, 9, . . . . . . . . . . . . . . .} \end{matrix}$

Discussion

14715.	Select the appropriate option for the blank. Mahesh ____ like the smell of boiling milk, does he?
Answer» Select the appropriate option for the blank. Mahesh ____ like the smell of boiling milk, does he?

14715.

Select the appropriate option for the blank. Mahesh ____ like the smell of boiling milk, does he?

Answer»

Select the appropriate option for the blank.

Mahesh ____ like the smell of boiling milk, does he?

Discussion

14716.	Classify acids on the basis of their basicity and explain each of them with examples.
Answer» Classify acids on the basis of their basicity and explain each of them with examples.

Discussion

14717.	During the chlor - alkali process, which gas is liberated at anode and cathode respectively?
Answer» During the chlor - alkali process, which gas is liberated at anode and cathode respectively?

Discussion

14718.	Question 7 Why does distilled water not conduct electricity, whereas rainwater does?
Answer» Question 7 Why does distilled water not conduct electricity, whereas rainwater does?

Discussion

14719.	The molecular mass of NaHCO3 is
Answer» The molecular mass of ${NaHCO}_{3}$ is

Discussion

14720.	Rahul and Ram had an argument. Rahul said that Sodium hydroxide is a stronger base than Ammonium hydroxide. Whereas Ram claimed just opposite to that. Which one do you think is correct?
Answer» Rahul and Ram had an argument. Rahul said that Sodium hydroxide is a stronger base than Ammonium hydroxide. Whereas Ram claimed just opposite to that. Which one do you think is correct?

Discussion

14721.	Compare roasting and calcination.
Answer» Compare roasting and calcination.

Discussion

14722.	State the effects of endothermic and exothermic reactions on the surroundings.
Answer» State the effects of endothermic and exothermic reactions on the surroundings.

Discussion

14723.	Electrolysis involves oxidation and reduction respectively at:
Answer» Electrolysis involves oxidation and reduction respectively at:

Discussion

14724.	"Explain divalency of beryllium, though the number of unpaired electrons in its atom is zero?"
Answer» "Explain divalency of beryllium, though the number of unpaired electrons in its atom is zero?"

Discussion

14725.	Question 5 (iii) Find 3.25 ÷ 0.5
Answer» Question 5 (iii) Find 3.25 $\div$ 0.5

Discussion

14726.	___ current is preferred for electrolysis.
Answer» ___ current is preferred for electrolysis.

Discussion

14727.	An element X reacts with dilute H2SO4 as well as with NaOH to produce salt and H2(g). Hence, it may be concluded that: A. X is an electropositive element. B. Oxide of X is basic in nature C. Oxide of X is acidic in nature. D. X is an electronegative element.
Answer» An element X reacts with dilute H₂SO₄ as well as with NaOH to produce salt and H₂(g). Hence, it may be concluded that: A. X is an electropositive element. B. Oxide of X is basic in nature C. Oxide of X is acidic in nature. D. X is an electronegative element.

14727.

An element X reacts with dilute H2SO4 as well as with NaOH to produce salt and H2(g). Hence, it may be concluded that: A. X is an electropositive element. B. Oxide of X is basic in nature C. Oxide of X is acidic in nature. D. X is an electronegative element.

Answer»

An element X reacts with dilute H₂SO₄ as well as with NaOH to produce salt and H₂(g). Hence, it may be concluded that:

A. X is an electropositive element.
B. Oxide of X is basic in nature
C. Oxide of X is acidic in nature.
D. X is an electronegative element.

Discussion

14728.	(a) What happens when dilute hydrochloric acid is added to lead nitrate solution. (b) Describe the two colour changes which take place when moist blue litmus is placed in a gas jar of chlorine. (c) What is the colour change that takes place when chlorine water is exposed to sunlight? [5 MARKS]
Answer» (a) What happens when dilute hydrochloric acid is added to lead nitrate solution. (b) Describe the two colour changes which take place when moist blue litmus is placed in a gas jar of chlorine. (c) What is the colour change that takes place when chlorine water is exposed to sunlight? [5 MARKS]

Discussion

14729.	According to Arrhenius, acid gives___.
Answer» According to Arrhenius, acid gives___.

Discussion

14730.	You have collected (a) 2 litres of CO2 (b) 3 litres fo chlorine (c) 5 litres fo hydrogen (d) 4 litres of nitrogen and (e) 1 litre fo SO2 under similar conditions of temperature and pressure. Which gas sample will have: (a) the greatest number of molecules, and (b) the least number of molecules? justify your answers.
Answer» You have collected (a) 2 litres of $C O_{2}$ (b) 3 litres fo chlorine (c) 5 litres fo hydrogen (d) 4 litres of nitrogen and (e) 1 litre fo $S O_{2}$ under similar conditions of temperature and pressure. Which gas sample will have: (a) the greatest number of molecules, and (b) the least number of molecules? justify your answers.

Discussion

14731.	In an experiment to test the pH of a given sample using pH paper, four students recorded the following observations: Sample taken, turned the pH paper colour into I WaterBlueII Dilute HClRedIII Dilute NaoHBlueIV Dilute Ethanoic AcidOrange Which one of the above observations is incorrect?
Answer» In an experiment to test the pH of a given sample using pH paper, four students recorded the following observations: Sample taken, turned the pH paper colour into $\begin{matrix} I Water & Blue II Dilute HCl & Red III Dilute NaoH & Blue IV Dilute Ethanoic Acid & Orange \end{matrix}$ Which one of the above observations is incorrect?

14731.

In an experiment to test the pH of a given sample using pH paper, four students recorded the following observations: Sample taken, turned the pH paper colour into I WaterBlueII Dilute HClRedIII Dilute NaoHBlueIV Dilute Ethanoic AcidOrange Which one of the above observations is incorrect?

Answer»

In an experiment to test the pH of a given sample using pH paper, four students recorded the following observations: Sample taken, turned the pH paper colour into

$\begin{matrix} I Water & Blue II Dilute HCl & Red III Dilute NaoH & Blue IV Dilute Ethanoic Acid & Orange \end{matrix}$

Which one of the above observations is incorrect?

Discussion

14732.	What name is given to the common salt which is mined from underground deposits ? How was this salt formed ?
Answer» What name is given to the common salt which is mined from underground deposits ? How was this salt formed ?

Discussion

14733.	In a displacement reaction, a ___ element displaces a ___ element from its salt-solution.
Answer» In a displacement reaction, a ___ element displaces a ___ element from its salt-solution.

Discussion

14734.	A balanced chemical equation always obeys law of conservation of ___.
Answer» A balanced chemical equation always obeys law of conservation of ___.

Discussion

14735.	Which among the following molecules are example(s) of molecule formed by catenation property?
Answer» Which among the following molecules are example(s) of molecule formed by catenation property?

Discussion

14736.	What is the IUPAC name of fourth member of the alcohol series? Draw its all possible structural isomers. [3 MARKS]
Answer» What is the IUPAC name of fourth member of the alcohol series? Draw its all possible structural isomers. [3 MARKS]

Discussion

14737.	CuO+X→CuSO4+H2O. Here (X) is
Answer» $C u O + X \to C u S O_{4} + H_{2} O$ . Here (X) is

Discussion

14738.	Find the molecular mass of the gas which is formed when acetic acid reacts with sodium bicarbonate (NaHCO3)
Answer» Find the molecular mass of the gas which is formed when acetic acid reacts with sodium bicarbonate $(N a H C O_{3})$

Discussion

14739.	An iron knife kept in blue copper sulphate solution turns the blue solution into light green. Explain with an equation. [2 MARKS]
Answer» An iron knife kept in blue copper sulphate solution turns the blue solution into light green. Explain with an equation. [2 MARKS]

Discussion

14740.	Question 9 The Soap molecule has a (a) Hydrophilic head and hydrophobic tail (b) Hydrophobic head and hydrophilic tail (c) Hydrophobic head and hydrophobic tail (d) Hydrophilic head and hydrophilic tail
Answer» Question 9 The Soap molecule has a (a) Hydrophilic head and hydrophobic tail (b) Hydrophobic head and hydrophilic tail (c) Hydrophobic head and hydrophobic tail (d) Hydrophilic head and hydrophilic tail

Discussion

14741.	Which of the following is correct about pH?
Answer» Which of the following is correct about pH?

Discussion

14742.	Which of the following statement is not correct about the periodic classification of elements?
Answer» Which of the following statement is not correct about the periodic classification of elements?

Discussion

14743.	What is: [3 MARKS] (a) aqua fortis (b) aqua-regia (c) fixation of nitrogen?
Answer» What is: [3 MARKS] (a) aqua fortis (b) aqua-regia (c) fixation of nitrogen?

Discussion

14744.	A compound X consists of 4.8% carbon and 95.2% bromine by mass.If the vapour density of the compound is 252.What is the molecular formula of the compound?
Answer» A compound X consists of 4.8% carbon and 95.2% bromine by mass.If the vapour density of the compound is 252.What is the molecular formula of the compound?

Discussion

14745.	The mass of Hydrogen at S.T.P. that is present in a vessel which can hold 4 grams of oxygen under similar conditions is
Answer» The mass of Hydrogen at S.T.P. that is present in a vessel which can hold 4 grams of oxygen under similar conditions is

Discussion

14746.	If there exists electropositive or electronegative charge in the carbon atoms of diamond, where all the valencies of one carbon atoms are fulfilled by another carbon atom only, how the atoms stay in place?
Answer» If there exists electropositive or electronegative charge in the carbon atoms of diamond, where all the valencies of one carbon atoms are fulfilled by another carbon atom only, how the atoms stay in place?

Discussion

14747.	A solution of ionic compound conducts electricity due to the presence of:
Answer» A solution of ionic compound conducts electricity due to the presence of:

Discussion

14748.	define the following terms A) catenation b) homologous series of hydrocarbons c) saponification d) hydrogenation
Answer» define the following terms A) catenation b) homologous series of hydrocarbons c) saponification d) hydrogenation

Discussion

14749.	If pressure becomes double at the same absolute temperature on 2 L of CO2 , then the final volume of CO2 will be?
Answer» If pressure becomes double at the same absolute temperature on 2 L of $C O_{2}$ , then the final volume of $C O_{2}$ will be?

Discussion

14750.	Write balanced chemical equations for each of the following reactions 1. Carbon dioxide Marble dissolves in hydrochloric acid to give calcium chloride water and carbon dioxide 2. Silver nitrate reacts with copper to produce copper nitrate and silver metal 3. Carbon dioxide gas is passed over lime water to form a precipitate of calcium carbonate 4. Aluminium Sulphate acts with Sodium Hydroxide to form precipitate of aluminium hydroxide and the solution of sodium sulphate 5. Barium Chloride solution reacts with sulphuric acid to form precipitate of Barium sulphate and solution of hydrochloric acid.
Answer» Write balanced chemical equations for each of the following reactions 1. Carbon dioxide Marble dissolves in hydrochloric acid to give calcium chloride water and carbon dioxide 2. Silver nitrate reacts with copper to produce copper nitrate and silver metal 3. Carbon dioxide gas is passed over lime water to form a precipitate of calcium carbonate 4. Aluminium Sulphate acts with Sodium Hydroxide to form precipitate of aluminium hydroxide and the solution of sodium sulphate 5. Barium Chloride solution reacts with sulphuric acid to form precipitate of Barium sulphate and solution of hydrochloric acid.

Discussion

Explore topic-wise InterviewSolutions in .

Which is more dangerous - a concentrated acid or a strong acid ?

Name one substance which acts as both oxidising as well as reducing agent

Take about 2g barium hydroxide in a test tube add 1g of ammonium chloride and mix with help of a glass rod touch the bottom of test tube, is this an exothermic or endothermic reaction

Which of the following gas brings tears to eyes?

Why alkane series is formed by replacing one H atom of an alkane by CH3 group?

Why methane can't be methene or methyne?

Why does corrosion always happen layer by layer?

What are the types of decomposition reaction, give example for each

Name the product formed when hydrogen is added to ethene.

In Van der Waal's equation of state of the gas law, the constant 'b' is a measure of

Xenon is a inert gas. So why it react with fluorine and oxygen .

Represent A – (A – B ) using a Venn diagram

A volatile acid X is formed when sodium chloride reacts with concentrated sulphuric acid. Name this volatile acid.

Select the appropriate option for the blank. Mahesh ____ like the smell of boiling milk, does he?

Classify acids on the basis of their basicity and explain each of them with examples.

During the chlor - alkali process, which gas is liberated at anode and cathode respectively?

Question 7 Why does distilled water not conduct electricity, whereas rainwater does?

The molecular mass of NaHCO3 is

Rahul and Ram had an argument. Rahul said that Sodium hydroxide is a stronger base than Ammonium hydroxide. Whereas Ram claimed just opposite to that. Which one do you think is correct?

Compare roasting and calcination.

State the effects of endothermic and exothermic reactions on the surroundings.

Electrolysis involves oxidation and reduction respectively at:

"Explain divalency of beryllium, though the number of unpaired electrons in its atom is zero?"

Question 5 (iii) Find 3.25 ÷ 0.5

___ current is preferred for electrolysis.

An element X reacts with dilute H2SO4 as well as with NaOH to produce salt and H2(g). Hence, it may be concluded that: A. X is an electropositive element. B. Oxide of X is basic in nature C. Oxide of X is acidic in nature. D. X is an electronegative element.

(a) What happens when dilute hydrochloric acid is added to lead nitrate solution. (b) Describe the two colour changes which take place when moist blue litmus is placed in a gas jar of chlorine. (c) What is the colour change that takes place when chlorine water is exposed to sunlight? [5 MARKS]

According to Arrhenius, acid gives___.

In an experiment to test the pH of a given sample using pH paper, four students recorded the following observations: Sample taken, turned the pH paper colour into I WaterBlueII Dilute HClRedIII Dilute NaoHBlueIV Dilute Ethanoic AcidOrange Which one of the above observations is incorrect?

What name is given to the common salt which is mined from underground deposits ? How was this salt formed ?

In a displacement reaction, a ___ element displaces a ___ element from its salt-solution.

A balanced chemical equation always obeys law of conservation of ___.

Which among the following molecules are example(s) of molecule formed by catenation property?

What is the IUPAC name of fourth member of the alcohol series? Draw its all possible structural isomers. [3 MARKS]

CuO+X→CuSO4+H2O. Here (X) is

Find the molecular mass of the gas which is formed when acetic acid reacts with sodium bicarbonate (NaHCO3)

An iron knife kept in blue copper sulphate solution turns the blue solution into light green. Explain with an equation. [2 MARKS]

Question 9 The Soap molecule has a (a) Hydrophilic head and hydrophobic tail (b) Hydrophobic head and hydrophilic tail (c) Hydrophobic head and hydrophobic tail (d) Hydrophilic head and hydrophilic tail

Which of the following is correct about pH?

Which of the following statement is not correct about the periodic classification of elements?

What is: [3 MARKS] (a) aqua fortis (b) aqua-regia (c) fixation of nitrogen?

A compound X consists of 4.8% carbon and 95.2% bromine by mass.If the vapour density of the compound is 252.What is the molecular formula of the compound?

The mass of Hydrogen at S.T.P. that is present in a vessel which can hold 4 grams of oxygen under similar conditions is

If there exists electropositive or electronegative charge in the carbon atoms of diamond, where all the valencies of one carbon atoms are fulfilled by another carbon atom only, how the atoms stay in place?

A solution of ionic compound conducts electricity due to the presence of:

define the following terms A) catenation b) homologous series of hydrocarbons c) saponification d) hydrogenation

If pressure becomes double at the same absolute temperature on 2 L of CO2 , then the final volume of CO2 will be?

In a displacement reaction, a _ element displaces a _ element from its salt-solution.