15280 + Interview Questions in Chemistry Page 236 InterviewSolution

11751.	Food cans are generally coated with tin rather than zinc because _______.
Answer» Food cans are generally coated with tin rather than zinc because _______.

Discussion

11752.	According to the Hund's rule, which of the following is the correct electronic configuration of nitrogen atom?
Answer» According to the Hund's rule, which of the following is the correct electronic configuration of nitrogen atom?

Discussion

11753.	The atom having the number of electron shell as 4 and valence electrons as 2 belongs to
Answer» The atom having the number of electron shell as 4 and valence electrons as 2 belongs to

Discussion

11754.	Which of the following is the correct order in terms of covalent radius?
Answer» Which of the following is the correct order in terms of covalent radius?

Discussion

11755.	Write the IUPAC name of the following:
Answer» Write the IUPAC name of the following:

11755.

Write the IUPAC name of the following:

Answer»

Write the IUPAC name of the following:

Discussion

11756.	What mass of MnO2 (in grams ) is required to produce 1.12 litres of chlorine gas at STP acccording to the given equation? (upto two decimals) MnO2 (s)+ 4HCl (aq)→MnCl2 (aq)+ 2H2O (l)+ Cl2 (g) Atomic masses of H = 1 u, Cl = 35.5 u, Mn = 55 u, O = 16 u4.35
Answer» What mass of ${MnO}_{2}$ (in grams ) is required to produce 1.12 litres of chlorine gas at STP acccording to the given equation? (upto two decimals) ${MnO}_{2} (s) + 4HCl (aq) \to {MnCl}_{2} (aq) + {2H}_{2} O (l) + {Cl}_{2} (g)$ Atomic masses of H = 1 u, Cl = 35.5 u, Mn = 55 u, O = 16 u 4.35

Discussion

11757.	The X and Y in the given equation respectively are: CH3COOC2H5NaOH−−−−→ X+Y
Answer» The X and Y in the given equation respectively are: $C H_{3} C O O C_{2} H_{5} N a O H - --- \to X + Y$

Discussion

11758.	Which of the following can be termed as refining?
Answer» Which of the following can be termed as refining?

Discussion

11759.	How did we know that light (EM radiation ) is not emitted but reflected from the moon because when we see it from earth we would only see A light(EM radiation ) how would we differrentiate between the empires or reflected?
Answer» How did we know that light (EM radiation ) is not emitted but reflected from the moon because when we see it from earth we would only see A light(EM radiation ) how would we differrentiate between the empires or reflected?

Discussion

11760.	In the reaction where ethanol reacts with sodium metal to give sodium ethoxide and hydrogen gas, the ethanol behaves like _______.
Answer» In the reaction where ethanol reacts with sodium metal to give sodium ethoxide and hydrogen gas, the ethanol behaves like _______.

Discussion

11761.	Balance this equation ( I )H2O2+Mno2=H2O+O2
Answer» Balance this equation ( I )H2O2+Mno2=H2O+O2

Discussion

11762.	An organic acid X is a liquid, which often freezes during winter time in cold countries, having the molecular formula C2H4O2. on warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound Y with a sweet smell is formed. (a) Identify X and Y. Also write their formulae showing the functional group present in them. (b) Write a chemical equation for the reaction involved.
Answer» An organic acid X is a liquid, which often freezes during winter time in cold countries, having the molecular formula $C_{2} H_{4} O_{2}$ . on warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound Y with a sweet smell is formed. (a) Identify X and Y. Also write their formulae showing the functional group present in them. (b) Write a chemical equation for the reaction involved.

11762.

An organic acid X is a liquid, which often freezes during winter time in cold countries, having the molecular formula C2H4O2. on warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound Y with a sweet smell is formed. (a) Identify X and Y. Also write their formulae showing the functional group present in them. (b) Write a chemical equation for the reaction involved.

Answer»

An organic acid X is a liquid, which often freezes during winter time in cold countries, having the molecular formula $C_{2} H_{4} O_{2}$ . on warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound Y with a sweet smell is formed.

(a) Identify X and Y. Also write their formulae showing the functional group present in them.

(b) Write a chemical equation for the reaction involved.

Discussion

11763.	C4H8 can have total of ----- isomers (geometrical not included)
Answer» $C_{4} H_{8}$ can have total of ----- isomers (geometrical not included)

Discussion

11764.	Strength of an acid can be explained on the basis of -
Answer» Strength of an acid can be explained on the basis of -

Discussion

11765.	What happens when silver(I) chloride is exposed to light?
Answer» What happens when silver(I) chloride is exposed to light?

Discussion

11766.	Two elements C and D belong to group 17 and 16 respectively. Whicha has smaller atomic size? Why?
Answer» Two elements C and D belong to group 17 and 16 respectively. Whicha has smaller atomic size? Why?

Discussion

11767.	Describe a test for carboxylic acids.
Answer» Describe a test for carboxylic acids.

Discussion

11768.	CuO+H2→Cu+H2O Consider the above reaction, the element that is oxidizes is A and the element that is reduced is B. The elements B and A respectively are ____________ and _____________.
Answer» $C u O + H_{2} \to C u + H_{2} O$ Consider the above reaction, the element that is oxidizes is A and the element that is reduced is B. The elements B and A respectively are ____________ and _____________.

11768.

CuO+H2→Cu+H2O Consider the above reaction, the element that is oxidizes is A and the element that is reduced is B. The elements B and A respectively are and _.

Answer»

$C u O + H_{2} \to C u + H_{2} O$

Consider the above reaction, the element that is oxidizes is A and the element that is reduced is B. The elements B and A respectively are ____________ and _____________.

Discussion

11769.	Lead nitrate reacting with hydrochloric gas forms white ppt and nitric acid. The white ppt is of:
Answer» Lead nitrate reacting with hydrochloric gas forms white ppt and nitric acid. The white ppt is of:

Discussion

11770.	Atomic mass of X and Z is 25 and 45 respectively. If X, Y and Z is Dobereiner's Triad. What will be the atomic number of Y?
Answer» Atomic mass of X and Z is 25 and 45 respectively. If X, Y and Z is Dobereiner's Triad. What will be the atomic number of Y?

Discussion

11771.	Explain the working of a lead-acid accumulator.
Answer» Explain the working of a lead-acid accumulator.

Discussion

11772.	Name the two elements that you would expect to show chemical reactions similar to magnesium. What is the basis of your choice?
Answer» Name the two elements that you would expect to show chemical reactions similar to magnesium. What is the basis of your choice?

Discussion

11773.	The difference in number of hydrogen atoms in the compounds butane and butyne is _______.
Answer» The difference in number of hydrogen atoms in the compounds butane and butyne is _______.

Discussion

11774.	Which of the following process is/are used for concentration of bauxite?
Answer» Which of the following process is/are used for concentration of bauxite?

Discussion

11775.	Helium is an unreactive gas and neon is a gas of extremely low creativity.What,if anything, do their atoms have in common.
Answer» Helium is an unreactive gas and neon is a gas of extremely low creativity.What,if anything, do their atoms have in common.

Discussion

11776.	The value of critical temperature TC for a gas is :
Answer» The value of critical temperature $T_{C}$ for a gas is :

Discussion

11777.	Rain water with a pH less than 5.6 is called:
Answer» Rain water with a pH less than 5.6 is called:

Discussion

11778.	Which of the following is a base?
Answer» Which of the following is a base?

Discussion

11779.	Volatile metals are purified by:
Answer» Volatile metals are purified by:

Discussion

11780.	What is the valency of Gold (Au)
Answer» What is the valency of Gold (Au)

Discussion

11781.	Choose the correct option regarding the statements given below: Statement 1: Blue litmus changes into red in acidic medium. Statement 2: Red litmus changes into blue in basic medium. Statement 3: Blue litmus changes into red in basic medium. Statement 4: Red litmus changes into blue in acidic medium.
Answer» Choose the correct option regarding the statements given below: Statement 1: Blue litmus changes into red in acidic medium. Statement 2: Red litmus changes into blue in basic medium. Statement 3: Blue litmus changes into red in basic medium. Statement 4: Red litmus changes into blue in acidic medium.

11781.

Choose the correct option regarding the statements given below: Statement 1: Blue litmus changes into red in acidic medium. Statement 2: Red litmus changes into blue in basic medium. Statement 3: Blue litmus changes into red in basic medium. Statement 4: Red litmus changes into blue in acidic medium.

Answer»

Choose the correct option regarding the statements given below:

Statement 1: Blue litmus changes into red in acidic medium.
Statement 2: Red litmus changes into blue in basic medium.
Statement 3: Blue litmus changes into red in basic medium.
Statement 4: Red litmus changes into blue in acidic medium.

Discussion

11782.	A is an ore of two metals which undergoes calcination and forms calcium oxide, magnesium oxide and carbon dioxide. Identify A from the following options.
Answer» $A$ is an ore of two metals which undergoes calcination and forms calcium oxide, magnesium oxide and carbon dioxide. Identify $A$ from the following options.

Discussion

11783.	The depletion of the ozone layer in the upper atmosphere is mainly due to the emission of : (a) unburnt hydrocarbons (b) chlorofluorocarbons (c) greenhouse gases (d) ultraviolet radiations
Answer» The depletion of the ozone layer in the upper atmosphere is mainly due to the emission of : (a) unburnt hydrocarbons (b) chlorofluorocarbons (c) greenhouse gases (d) ultraviolet radiations

11783.

The depletion of the ozone layer in the upper atmosphere is mainly due to the emission of : (a) unburnt hydrocarbons (b) chlorofluorocarbons (c) greenhouse gases (d) ultraviolet radiations

Answer»

The depletion of the ozone layer in the upper atmosphere is mainly due to the emission of :

(a) unburnt hydrocarbons (b) chlorofluorocarbons

(c) greenhouse gases (d) ultraviolet radiations

Discussion

11784.	Which of the following statement is incorrect about cations?
Answer» Which of the following statement is incorrect about cations?

Discussion

11785.	How is acetic acid prepared from (a) ethanol (b) acetylene ?
Answer» How is acetic acid prepared from (a) ethanol (b) acetylene ?

Discussion

11786.	Select the correct statement(s) regarding ionic bond:
Answer» Select the correct statement(s) regarding ionic bond:

Discussion

11787.	What is the chemical name of the compound with chemical formula C5H8?
Answer» What is the chemical name of the compound with chemical formula $C_{5} H_{8}$ ?

Discussion

11788.	identify oxidising and reducing agents in equation H2 + Cl2 gives 2HCl
Answer» identify oxidising and reducing agents in equation H₂ + Cl_{2 gives 2HCl}

11788.

identify oxidising and reducing agents in equation H2 + Cl2 gives 2HCl

Answer»

identify oxidising and reducing agents in equation

H₂ + Cl_{2 gives 2HCl}

Discussion

11789.	Explain the different trophic levels in brief. [3 MARKS]
Answer» Explain the different trophic levels in brief. [3 MARKS]

Discussion

11790.	Which of the following is the correct representation of water(H2O)?
Answer» Which of the following is the correct representation of water( $H_{2} O$ )?

Discussion

11791.	What is the category name of each column of the periodic table like halogen,etc.,..?
Answer» What is the category name of each column of the periodic table like halogen,etc.,..?

Discussion

11792.	Reactants used for manufacturing nitric acid in ostwald process are.
Answer» Reactants used for manufacturing nitric acid in ostwald process are.

Discussion

11793.	Which of the following is bigger in size? Mg or Mg^2+ Cl or Cl^-
Answer» Which of the following is bigger in size? Mg or Mg^2+ Cl or Cl^-

Discussion

11794.	On opening the soda water Bottle the dissolved CO2 comes out. Would the pH of the solution increase or decrease as the gas comes out ?explain your answer.
Answer» On opening the soda water Bottle the dissolved CO2 comes out. Would the pH of the solution increase or decrease as the gas comes out ?explain your answer.

Discussion

11795.	Account for the following and give reason - Calcium chloride forms a white coloured suspension on adding water .
Answer» Account for the following and give reason - Calcium chloride forms a white coloured suspension on adding water .

Discussion

11796.	Which of the following is a Dobereiner's triad?
Answer» Which of the following is a Dobereiner's triad?

Discussion

11797.	As F2 has the smallest size and greatest electron density it should be least reactive slso HF should also be least reactive and I2 due to larger size will be easily reacted HI should also be easily reacted... but it is not the case... then what is correct regarding the size and reactivity? HydroHalogenation is in order of HI>HBr>HCl>HI same order should be for halogenation But it is not so..
Answer» As F2 has the smallest size and greatest electron density it should be least reactive slso HF should also be least reactive and I2 due to larger size will be easily reacted HI should also be easily reacted... but it is not the case... then what is correct regarding the size and reactivity? HydroHalogenation is in order of HI>HBr>HCl>HI same order should be for halogenation But it is not so..

Discussion

11798.	what is the difference between alloy and amalgum
Answer» what is the difference between alloy and amalgum

Discussion

11799.	What is the general formula of the homologous series of alcohols? [1 MARK]
Answer» What is the general formula of the homologous series of alcohols? [1 MARK]

Discussion

11800.	Sulphur dioxide gas gets evolved when HCl acid is added to:
Answer» Sulphur dioxide gas gets evolved when HCl acid is added to:

Discussion

Explore topic-wise InterviewSolutions in .

Food cans are generally coated with tin rather than zinc because _______.

According to the Hund's rule, which of the following is the correct electronic configuration of nitrogen atom?

The atom having the number of electron shell as 4 and valence electrons as 2 belongs to

Which of the following is the correct order in terms of covalent radius?

Write the IUPAC name of the following:

What mass of MnO2 (in grams ) is required to produce 1.12 litres of chlorine gas at STP acccording to the given equation? (upto two decimals) MnO2 (s)+ 4HCl (aq)→MnCl2 (aq)+ 2H2O (l)+ Cl2 (g) Atomic masses of H = 1 u, Cl = 35.5 u, Mn = 55 u, O = 16 u4.35

The X and Y in the given equation respectively are: CH3COOC2H5NaOH−−−−→ X+Y

Which of the following can be termed as refining?

How did we know that light (EM radiation ) is not emitted but reflected from the moon because when we see it from earth we would only see A light(EM radiation ) how would we differrentiate between the empires or reflected?

In the reaction where ethanol reacts with sodium metal to give sodium ethoxide and hydrogen gas, the ethanol behaves like _______.

Balance this equation ( I )H2O2+Mno2=H2O+O2

C4H8 can have total of ----- isomers (geometrical not included)

Strength of an acid can be explained on the basis of -

What happens when silver(I) chloride is exposed to light?

Two elements C and D belong to group 17 and 16 respectively. Whicha has smaller atomic size? Why?

Describe a test for carboxylic acids.

CuO+H2→Cu+H2O Consider the above reaction, the element that is oxidizes is A and the element that is reduced is B. The elements B and A respectively are ____________ and _____________.

Lead nitrate reacting with hydrochloric gas forms white ppt and nitric acid. The white ppt is of:

Atomic mass of X and Z is 25 and 45 respectively. If X, Y and Z is Dobereiner's Triad. What will be the atomic number of Y?

Explain the working of a lead-acid accumulator.

Name the two elements that you would expect to show chemical reactions similar to magnesium. What is the basis of your choice?

The difference in number of hydrogen atoms in the compounds butane and butyne is _______.

Which of the following process is/are used for concentration of bauxite?

Helium is an unreactive gas and neon is a gas of extremely low creativity.What,if anything, do their atoms have in common.

The value of critical temperature TC for a gas is :

Rain water with a pH less than 5.6 is called:

Which of the following is a base?

Volatile metals are purified by:

What is the valency of Gold (Au)

A is an ore of two metals which undergoes calcination and forms calcium oxide, magnesium oxide and carbon dioxide.​​​ Identify A from the following options.

The depletion of the ozone layer in the upper atmosphere is mainly due to the emission of : (a) unburnt hydrocarbons (b) chlorofluorocarbons (c) greenhouse gases (d) ultraviolet radiations

Which of the following statement is incorrect about cations?

How is acetic acid prepared from (a) ethanol (b) acetylene ?

Select the correct statement(s) regarding ionic bond:

What is the chemical name of the compound with chemical formula C5H8?

identify oxidising and reducing agents in equation H2 + Cl2 gives 2HCl

Explain the different trophic levels in brief. [3 MARKS]

Which of the following is the correct representation of water(H2O)?

What is the category name of each column of the periodic table like halogen,etc.,..?

Reactants used for manufacturing nitric acid in ostwald process are.

Which of the following is bigger in size? Mg or Mg^2+ Cl or Cl^-

On opening the soda water Bottle the dissolved CO2 comes out. Would the pH of the solution increase or decrease as the gas comes out ?explain your answer.

Account for the following and give reason - Calcium chloride forms a white coloured suspension on adding water .

Which of the following is a Dobereiner's triad?

what is the difference between alloy and amalgum

What is the general formula of the homologous series of alcohols? [1 MARK]

Sulphur dioxide gas gets evolved when HCl acid is added to:

CuO+H2→Cu+H2O Consider the above reaction, the element that is oxidizes is A and the element that is reduced is B. The elements B and A respectively are and _.

A is an ore of two metals which undergoes calcination and forms calcium oxide, magnesium oxide and carbon dioxide. Identify A from the following options.