15280 + Interview Questions in Chemistry Page 199 InterviewSolution

9901.	Non-metals when dissolved in water form ___ oxides:
Answer» Non-metals when dissolved in water form ___ oxides:

Discussion

9902.	What is the colour of the turmeric in acid and base ?
Answer» What is the colour of the turmeric in acid and base ?

Discussion

9903.	When Ba(OH)2 is mixed with NH4Cl then why BaCl2, NH3 and H2O is formed and not BaCl2 and NH4OH?
Answer» When Ba(OH)₂ is mixed with NH₄Cl then why BaCl₂, NH₃ and H₂O is formed and not BaCl₂and NH₄OH?

Discussion

9904.	what are coinage metals what factor adds value to metals like gold and silver which make them expensive
Answer» what are coinage metals what factor adds value to metals like gold and silver which make them expensive

Discussion

9905.	Example for ph change
Answer» Example for ph change

Discussion

9906.	An alkyne has seventy-five carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be : (a) 150 (b) 148 (c) 152 (d) 146
Answer» An alkyne has seventy-five carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be : (a) 150 (b) 148 (c) 152 (d) 146

Discussion

9907.	An electric lamp rated 250V, 50W. Calculate the resistance of the filament.
Answer» An electric lamp rated 250V, 50W. Calculate the resistance of the filament.

Discussion

9908.	Which organic compound among the following is not an isomer of CH3−CO−CH2CH2CH2CH3?
Answer» Which organic compound among the following is not an isomer of $C H_{3} - C O - C H_{2} C H_{2} C H_{2} C H_{3}$ ?

Discussion

9909.	The pungent smell which one encounters near a decaying heap of organic matter or a toilet is due to ________.
Answer» The pungent smell which one encounters near a decaying heap of organic matter or a toilet is due to ________.

Discussion

9910.	NaHCO3 on heating gives out:
Answer» ${NaHCO}_{3}$ on heating gives out:

Discussion

9911.	What do you observe when you drop a few drops of acetic acid in a test- tube containing. a) Phenolphthalein . b) Distilled water c) Universal indicator d) Sodium hydrogen carbonate power.
Answer» What do you observe when you drop a few drops of acetic acid in a test- tube containing. a) Phenolphthalein . b) Distilled water c) Universal indicator d) Sodium hydrogen carbonate power.

9911.

What do you observe when you drop a few drops of acetic acid in a test- tube containing. a) Phenolphthalein . b) Distilled water c) Universal indicator d) Sodium hydrogen carbonate power.

Answer»

What do you observe when you drop a few drops of acetic acid in a test- tube containing.

a) Phenolphthalein .

b) Distilled water

c) Universal indicator

d) Sodium hydrogen carbonate power.

Discussion

9912.	Which gas is released when acids react with metal carbonates?
Answer» Which gas is released when acids react with metal carbonates?

Discussion

9913.	The equivalent conductivity of a solution containing 2.54g of CuSO4 per litre is 91.0 W-1 cm2 eq-1. Its conductivity is:
Answer» The equivalent conductivity of a solution containing 2.54g of CuSO₄ per litre is 91.0 W^-1 cm² eq^-1. Its conductivity is:

Discussion

9914.	1)Why does the size of atoms of halogen family decreases down the group?? 2)reactivity of the atoms of halogen family decreases down the group ,why ?? 3)why does the atom of halogen family do not react with water and acids??
Answer» 1)Why does the size of atoms of halogen family decreases down the group?? 2)reactivity of the atoms of halogen family decreases down the group ,why ?? 3)why does the atom of halogen family do not react with water and acids??

9914.

1)Why does the size of atoms of halogen family decreases down the group?? 2)reactivity of the atoms of halogen family decreases down the group ,why ?? 3)why does the atom of halogen family do not react with water and acids??

Answer»

1)Why does the size of atoms of halogen family decreases down the group??

2)reactivity of the atoms of halogen family decreases down the group ,why ??

3)why does the atom of halogen family do not react with water and acids??

Discussion

9915.	What is the full form of pH?
Answer» What is the full form of pH?

Discussion

9916.	Alkanes are soluble in:
Answer» Alkanes are soluble in:

Discussion

9917.	The most electronegative element is
Answer» The most electronegative element is

Discussion

9918.	What is the odour of the gas released when NH4Cl and Ca(OH)2 are mixed?
Answer» What is the odour of the gas released when $N H_{4} C l$ and $C a (O H)_{2}$ are mixed?

Discussion

9919.	The most malleable metal is_______.
Answer» The most malleable metal is_______.

Discussion

9920.	Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid.
Answer» Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid.

Discussion

9921.	Increasing order of sizes of hybrid orbitals is
Answer» Increasing order of sizes of hybrid orbitals is

Discussion

9922.	Haematite and magnetite are ores of:
Answer» Haematite and magnetite are ores of:

Discussion

9923.	Which catalyst is used in the catalytic oxidation of ammonia?
Answer» Which catalyst is used in the catalytic oxidation of ammonia?

Discussion

9924.	Find the Relative molar masses of (a) Benzyl Alcohol C7H8O (b) Acetic acid (CH3COOH) (c) Benzoic Acid (C6H5COOH)
Answer» Find the Relative molar masses of (a) Benzyl Alcohol $C_{7} H_{8} O$ (b) Acetic acid $(C H_{3} C O O H)$ (c) Benzoic Acid $(C_{6} H_{5} C O O H)$

9924.

Find the Relative molar masses of (a) Benzyl Alcohol C7H8O (b) Acetic acid (CH3COOH) (c) Benzoic Acid (C6H5COOH)

Answer»

Find the Relative molar masses of

(a) Benzyl Alcohol $C_{7} H_{8} O$

(b) Acetic acid $(C H_{3} C O O H)$

(c) Benzoic Acid $(C_{6} H_{5} C O O H)$

Discussion

9925.	Reaction of manganese with nitric acid
Answer» Reaction of manganese with nitric acid

Discussion

9926.	Non-metals generally form ________.
Answer» Non-metals generally form ________.

Discussion

9927.	34 g of Ammonia is decomposed to _________ g of Nitrogen and _____ g of Hydrogen, _____ is the ratio of Hydrogen to Nitrogen by mass. The options in blanks are respectively
Answer» 34 g of Ammonia is decomposed to _________ g of Nitrogen and _____ g of Hydrogen, _____ is the ratio of Hydrogen to Nitrogen by mass. The options in blanks are respectively

Discussion

9928.	Which of the following is a modern form of currency?
Answer» Which of the following is a modern form of currency?

Discussion

9929.	Differentiate between ionic and covalent bond?
Answer» Differentiate between ionic and covalent bond?

Discussion

9930.	All of these species have the same number of Valence Electrons as nitrate Ion ,except (A) Carbonate ion (B) Bicarbonate ion (C) NF3 (D) SO3
Answer» All of these species have the same number of Valence Electrons as nitrate Ion ,except (A) Carbonate ion (B) Bicarbonate ion (C) NF3 (D) SO3

Discussion

9931.	What is the speciality of alkali metals?? what is the speciality of compounds made by them? plss explain
Answer» What is the speciality of alkali metals?? what is the speciality of compounds made by them? plss explain

Discussion

9932.	An organic compound A is a constituent of antifreeze . The compound on heating with oxygen forms another compound B which has molecular formula of C2H4O6 , identify the compounds. Write chemical reaction involved. Write one use of each compound.
Answer» An organic compound A is a constituent of antifreeze . The compound on heating with oxygen forms another compound B which has molecular formula of C₂H₄O_{6 , identify the compounds. Write chemical reaction involved. Write one use of each compound.}

Discussion

9933.	(a) What happens when methane (natural gas) burns in air ? Write the chemical equation of the reaction involved. (b) What happens when ethanoic acid reacts with sodium carbonate ? Write chemical equation of the reaction involved. (c) Give a test that can be used to differentiate chemically between butter and cooking oil.
Answer» (a) What happens when methane (natural gas) burns in air ? Write the chemical equation of the reaction involved. (b) What happens when ethanoic acid reacts with sodium carbonate ? Write chemical equation of the reaction involved. (c) Give a test that can be used to differentiate chemically between butter and cooking oil.

Discussion

9934.	A gas cylinder holds 80g of hydrogen gas. The same cylinder holds 400 g of gas X. Considering the same conditions of temperature and pressure in the cylinder, calculate the vapour density of gas X.
Answer» A gas cylinder holds 80g of hydrogen gas. The same cylinder holds 400 g of gas X. Considering the same conditions of temperature and pressure in the cylinder, calculate the vapour density of gas X.

Discussion

9935.	What is the chemical formula of butyric acid , lactic acid maleic acid , srearic acid and uric acid ?
Answer» What is the chemical formula of butyric acid , lactic acid maleic acid , srearic acid and uric acid ?

Discussion

9936.	An electric discharge is passed through a mixture containing 50 c.c. of O2 and 50 c.c. of H2. The volume of the gases formed (i) at room temperature and (ii) at 1100C will be
Answer» An electric discharge is passed through a mixture containing 50 c.c. of $O_{2}$ and 50 c.c. of $H_{2}$ . The volume of the gases formed (i) at room temperature and (ii) at 110⁰C will be

Discussion

9937.	Solution A reacts with an acid B (which gives greenish-yellow gas on reacting with oxidising agents like Pb3O4 to give white precipitate C insoluble in nitric acid but soluble in ammonium hydroxide. Name A, B and C.
Answer» Solution A reacts with an acid B (which gives greenish-yellow gas on reacting with oxidising agents like $P b_{3} O_{4}$ to give white precipitate C insoluble in nitric acid but soluble in ammonium hydroxide. Name A, B and C.

Discussion

9938.	Which of the following have high electron affinity?
Answer» Which of the following have high electron affinity?

Discussion

9939.	For the formation of covalent bond the difference in the value of electro negativities should be:
Answer» For the formation of covalent bond the difference in the value of electro negativities should be:

Discussion

9940.	From the following list of substances, choose one substance in each case which matches the description given below: [4 MARKS] Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate (a) A nitrate which gives out only oxygen when heated. (b) A nitrate which on heating decomposes into dinitrogen oxide [nitrous oxide] and steam. (c) A nitrate which gives off oxygen and nitrogen dioxide when heated.
Answer» From the following list of substances, choose one substance in each case which matches the description given below: [4 MARKS] Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate (a) A nitrate which gives out only oxygen when heated. (b) A nitrate which on heating decomposes into dinitrogen oxide [nitrous oxide] and steam. (c) A nitrate which gives off oxygen and nitrogen dioxide when heated.

Discussion

9941.	Why is the ratio of 2:3 of ammonium chloride and calcium hydroxide taken in lab preparation of ammonia gas
Answer» Why is the ratio of 2:3 of ammonium chloride and calcium hydroxide taken in lab preparation of ammonia gas

Discussion

9942.	Which of the following is/are correct about ionic bonding?
Answer» Which of the following is/are correct about ionic bonding?

Discussion

9943.	A non metal which is a good conductor of heat and electricity is-
Answer» A non metal which is a good conductor of heat and electricity is-

Discussion

9944.	Which of the following are units of temperature?
Answer» Which of the following are units of temperature?

Discussion

9945.	Salts of which of the following ion give rise to form coloured solution?
Answer» Salts of which of the following ion give rise to form coloured solution?

Discussion

9946.	Acids are sour in taste.are sour substances acidic?
Answer» Acids are sour in taste.are sour substances acidic?

Discussion

9947.	Which of the following statement is not true about boric acid?
Answer» Which of the following statement is not true about boric acid?

Discussion

9948.	Match the conversion in Column I with the type(s) of reaction(s) given in Column II. Column IColumn IIA.PbS⟶PbOp.RoastingB.CaCO3⟶CaOq.CalcinationC.ZnS⟶Znr.Carbon reductionD.Cu2S⟶Cus.Self−reduction
Answer» Match the conversion in $C o l u m n I$ with the type(s) of reaction(s) given in $C o l u m n I I$ . $\begin{matrix} C o l u m n I & C o l u m n I I A . & P b S ⟶ P b O & p . & R o a s t i n g B . & C a C O_{3} ⟶ C a O & q . & C a l c i n a t i o n C . & Z n S ⟶ Z n & r . & C a r b o n r e d u c t i o n D . & C u_{2} S ⟶ C u & s . & S e l f - r e d u c t i o n \end{matrix}$

Discussion

9949.	Why is silver good a conductor of electricity? Why is gold ductile?
Answer» Why is silver good a conductor of electricity? Why is gold ductile?

Discussion

9950.	An atom of an element (X) has its K, L and M shells filled with some electrons. It reacts with sodium metal to form a compound NaX. The number of electrons in the M shell of the atom (X) is
Answer» An atom of an element (X) has its K, L and M shells filled with some electrons. It reacts with sodium metal to form a compound NaX. The number of electrons in the M shell of the atom (X) is

Discussion

Explore topic-wise InterviewSolutions in .

Non-metals when dissolved in water form ___ oxides:

What is the colour of the turmeric in acid and base ?

When Ba(OH)2 is mixed with NH4Cl then why BaCl2, NH3 and H2O is formed and not BaCl2 and NH4OH?

what are coinage metals what factor adds value to metals like gold and silver which make them expensive

Example for ph change

An alkyne has seventy-five carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be : (a) 150 (b) 148 (c) 152 (d) 146

An electric lamp rated 250V, 50W. Calculate the resistance of the filament.

Which organic compound among the following is not an isomer of CH3−CO−CH2CH2CH2CH3?

The pungent smell which one encounters near a decaying heap of organic matter or a toilet is due to ________.

NaHCO3 on heating gives out:

What do you observe when you drop a few drops of acetic acid in a test- tube containing. a) Phenolphthalein . b) Distilled water c) Universal indicator d) Sodium hydrogen carbonate power.

Which gas is released when acids react with metal carbonates?

The equivalent conductivity of a solution containing 2.54g of CuSO4 per litre is 91.0 W-1 cm2 eq-1. Its conductivity is:

1)Why does the size of atoms of halogen family decreases down the group?? 2)reactivity of the atoms of halogen family decreases down the group ,why ?? 3)why does the atom of halogen family do not react with water and acids??

What is the full form of pH?

Alkanes are soluble in:

The most electronegative element is

What is the odour of the gas released when NH4Cl and Ca(OH)2 are mixed?

The most malleable metal is_______.

Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid.

Increasing order of sizes of hybrid orbitals is

Haematite and magnetite are ores of:

Which catalyst is used in the catalytic oxidation of ammonia?

Find the Relative molar masses of (a) Benzyl Alcohol C7H8O (b) Acetic acid (CH3COOH) (c) Benzoic Acid (C6H5COOH)

Reaction of manganese with nitric acid

Non-metals generally form ________.

34 g of Ammonia is decomposed to _________ g of Nitrogen and _____ g of Hydrogen, _____ is the ratio of Hydrogen to Nitrogen by mass. The options in blanks are respectively

Which of the following is a modern form of currency?

Differentiate between ionic and covalent bond?

All of these species have the same number of Valence Electrons as nitrate Ion ,except (A) Carbonate ion (B) Bicarbonate ion (C) NF3 (D) SO3

What is the speciality of alkali metals?? what is the speciality of compounds made by them? plss explain ​​​​​​

An organic compound A is a constituent of antifreeze . The compound on heating with oxygen forms another compound B which has molecular formula of C2H4O6 , identify the compounds. Write chemical reaction involved. Write one use of each compound.

A gas cylinder holds 80g of hydrogen gas. The same cylinder holds 400 g of gas X. Considering the same conditions of temperature and pressure in the cylinder, calculate the vapour density of gas X.

What is the chemical formula of butyric acid , lactic acid maleic acid , srearic acid and uric acid ?

An electric discharge is passed through a mixture containing 50 c.c. of O2 and 50 c.c. of H2. The volume of the gases formed (i) at room temperature and (ii) at 1100C will be

Solution A reacts with an acid B (which gives greenish-yellow gas on reacting with oxidising agents like Pb3O4 to give white precipitate C insoluble in nitric acid but soluble in ammonium hydroxide. Name A, B and C.

Which of the following have high electron affinity?

For the formation of covalent bond the difference in the value of electro negativities should be:

Why is the ratio of 2:3 of ammonium chloride and calcium hydroxide taken in lab preparation of ammonia gas

Which of the following is/are correct about ionic bonding?

A non metal which is a good conductor of heat and electricity is-

Which of the following are units of temperature?

Salts of which of the following ion give rise to form coloured solution?

Acids are sour in taste.are sour substances acidic?

Which of the following statement is not true about boric acid?

Match the conversion in Column I with the type(s) of reaction(s) given in Column II. Column IColumn IIA.PbS⟶PbOp.RoastingB.CaCO3⟶CaOq.CalcinationC.ZnS⟶Znr.Carbon reductionD.Cu2S⟶Cus.Self−reduction

Why is silver good a conductor of electricity? Why is gold ductile?

An atom of an element (X) has its K, L and M shells filled with some electrons. It reacts with sodium metal to form a compound NaX. The number of electrons in the M shell of the atom (X) is

34 g of Ammonia is decomposed to _______ g of Nitrogen and _ g of Hydrogen, ___ is the ratio of Hydrogen to Nitrogen by mass. The options in blanks are respectively

What is the speciality of alkali metals?? what is the speciality of compounds made by them? plss explain