15280 + Interview Questions in Chemistry Page 66 InterviewSolution

3251.	what is derived name of neopentyl alcohol?1.isopropyl carbinol2.n-butyl carbinol3.tertiary butyl carbinol4.ethyl methyl carbinol
Answer» what is derived name of neopentyl alcohol? 1.isopropyl carbinol 2.n-butyl carbinol 3.tertiary butyl carbinol 4.ethyl methyl carbinol

Discussion

3252.	What is difference in word iso and seconary
Answer» What is difference in word iso and seconary

Discussion

3253.	which element is largest in size and why ? 1. Co(cobalt) 2. Ni(nickel) 3. Cu(copper) 4. Zn(zinc)
Answer» which element is largest in size and why ? 1. Co(cobalt) 2. Ni(nickel) 3. Cu(copper) 4. Zn(zinc)

Discussion

3254.	The number of moles of molecules present in 288 g of oxygen gas is:
Answer» The number of moles of molecules present in 288 g of oxygen gas is:

Discussion

3255.	Calculate the number of hydrogens present in an alkane, containing 15 carbons atoms.
Answer» Calculate the number of hydrogens present in an alkane, containing 15 carbons atoms.

Discussion

3256.	What would you observe when : (a) blue litmus is introduced into a solution of hydrogen chloride gas, (b) red litmus paper is introduced into a solution of ammonia in water, (c) red litmus paper is introduced in caustic soda solution?
Answer» What would you observe when : (a) blue litmus is introduced into a solution of hydrogen chloride gas, (b) red litmus paper is introduced into a solution of ammonia in water, (c) red litmus paper is introduced in caustic soda solution?

3256.

What would you observe when : (a) blue litmus is introduced into a solution of hydrogen chloride gas, (b) red litmus paper is introduced into a solution of ammonia in water, (c) red litmus paper is introduced in caustic soda solution?

Answer»

What would you observe when :

(a) blue litmus is introduced into a solution of hydrogen chloride gas,

(b) red litmus paper is introduced into a solution of ammonia in water,

(c) red litmus paper is introduced in caustic soda solution?

Discussion

3257.	Fresh milk has a pH of 6. When milk changes into curd, the pH value will : (a) become 7 (b) become less than 6 (c) become more than 7 (d) remain unchanged
Answer» Fresh milk has a pH of 6. When milk changes into curd, the pH value will : (a) become 7 (b) become less than 6 (c) become more than 7 (d) remain unchanged

3257.

Fresh milk has a pH of 6. When milk changes into curd, the pH value will : (a) become 7 (b) become less than 6 (c) become more than 7 (d) remain unchanged

Answer»

Fresh milk has a pH of 6. When milk changes into curd, the pH value will :

(a) become 7

(b) become less than 6

(c) become more than 7

(d) remain unchanged

Discussion

3258.	How to balance NH3+O2=NO+H2O by algebraic method
Answer» How to balance NH3+O2=NO+H2O by algebraic method

Discussion

3259.	An element ‘X’ has an atomic mass number = 27. If the number of electrons = 13. Then the number of neutrons will be _____.
Answer» An element ‘X’ has an atomic mass number = 27. If the number of electrons = 13. Then the number of neutrons will be _____.

Discussion

3260.	Draw neat labelled diagrams to show the hydrophobic and hydrophilic ends of a soap and micelle. [3 MARKS]
Answer» Draw neat labelled diagrams to show the hydrophobic and hydrophilic ends of a soap and micelle. [3 MARKS]

Discussion

3261.	In the following electronic configuration, some rules have been violated:I:Hund II: Pauli’s exclusionIII: Aufbau
Answer» In the following electronic configuration, some rules have been violated: I:Hund II: Pauli’s exclusion III: Aufbau

3261.

In the following electronic configuration, some rules have been violated:I:Hund II: Pauli’s exclusionIII: Aufbau

Answer»

In the following electronic configuration, some rules have been violated:

I:Hund

II: Pauli’s exclusion

III: Aufbau

Discussion

3262.	Number of water molecules present in one formula unit of a salt is called__.
Answer» Number of water molecules present in one formula unit of a salt is called__.

Discussion

3263.	Which gas is formed when an amphoteric metal reacts with a strong base?
Answer» Which gas is formed when an amphoteric metal reacts with a strong base?

Discussion

3264.	The number of carbon atoms joined in a spherical molecule of buckministerfullerene is : (a) fifty (b) sixty (c) seventy (d) ninety
Answer» The number of carbon atoms joined in a spherical molecule of buckministerfullerene is : (a) fifty (b) sixty (c) seventy (d) ninety

Discussion

3265.	Why detergent is more efficient in hard water but not washing soda?
Answer» Why detergent is more efficient in hard water but not washing soda?

Discussion

3266.	Give reasons : Iron sheets are cleaned with hydrochloric acid before dipping into molten zinc for galvanizing.
Answer» Give reasons : Iron sheets are cleaned with hydrochloric acid before dipping into molten zinc for galvanizing.

Discussion

3267.	5. An oxide of metal (at. weight 56) contains 30% oxygen by weight. The oxide was converted into chloride and then solution was electrolysed. Calculate the amount of metal that would be deposited at the cathode, if a current of 0.965 A was passed for a period of 5 hour. What is the valency of metal? What will be the formula of oxide?
Answer» 5. An oxide of metal (at. weight 56) contains 30% oxygen by weight. The oxide was converted into chloride and then solution was electrolysed. Calculate the amount of metal that would be deposited at the cathode, if a current of 0.965 A was passed for a period of 5 hour. What is the valency of metal? What will be the formula of oxide?

Discussion

3268.	A solution reacts with crushed egg shells to give a gas that turns lime water milky. The solution contains what?
Answer» A solution reacts with crushed egg shells to give a gas that turns lime water milky. The solution contains what?

Discussion

3269.	Explain the structures of (a) Hydronium ion, and (b) Ammonium ion.
Answer» Explain the structures of (a) Hydronium ion, and (b) Ammonium ion.

Discussion

3270.	As magnesium do not react with water then when we placed magnesium inside the cold water then the evolution of hydrogen gas takes place. Why ?
Answer» As magnesium do not react with water then when we placed magnesium inside the cold water then the evolution of hydrogen gas takes place. Why ?

Discussion

3271.	Why do elements gain/lose electrons to form compounds?
Answer» Why do elements gain/lose electrons to form compounds?

Discussion

3272.	A student measured the pH values of four solutions A, B, C and D which were found to be 4, 1, 13 and 11 respectively. Which of the following statements are correct about these solutions ?(a) A is strong acid and B is weak acid(b) B is strong acid and D is weak base(c) D is strong base and C is weak base(d) C is strong base and A is weak acid(1) (a) and (b) (2) (b) and (c) (3) (c) and (d) (4) (b) and (d)
Answer» A student measured the pH values of four solutions A, B, C and D which were found to be 4, 1, 13 and 11 respectively. Which of the following statements are correct about these solutions ? (a) A is strong acid and B is weak acid (b) B is strong acid and D is weak base (c) D is strong base and C is weak base (d) C is strong base and A is weak acid (1) (a) and (b) (2) (b) and (c) (3) (c) and (d) (4) (b) and (d)

Discussion

3273.	What is the difference between alcohols and base as both of them have OH- attached to them?
Answer» What is the difference between alcohols and base as both of them have OH- attached to them?

Discussion

3274.	The property due to which a substance abosrbs moisture and dissolves in it is called
Answer» The property due to which a substance abosrbs moisture and dissolves in it is called

Discussion

3275.	Which one of the following pollutants is produced by combustion of coal, petrol and diesel?
Answer» Which one of the following pollutants is produced by combustion of coal, petrol and diesel?

Discussion

3276.	how to learn order in chemistry like density , ionisation inthalpy , radius , melting and boiling pts , electro positive and negative
Answer» how to learn order in chemistry like density , ionisation inthalpy , radius , melting and boiling pts , electro positive and negative

Discussion

3277.	What is the actual difference between ionization energy and successive ionization energy?
Answer» What is the actual difference between ionization energy and successive ionization energy?

Discussion

3278.	The hydrated salt of Na2CO3.xH2O undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is
Answer» The hydrated salt of Na2CO3.xH2O undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is

Discussion

3279.	Magnetic quantum number signifies
Answer» Magnetic quantum number signifies

Discussion

3280.	Why does Gentian violet have a positive charge?
Answer» Why does Gentian violet have a positive charge?

Discussion

3281.	What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.
Answer» What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.

Discussion

3282.	5p,4d,5fand6p orbitals are arranged in the order of decreasing energy. The correct option is ?
Answer» $5 p, 4 d, 5 f a n d 6 p$ orbitals are arranged in the order of decreasing energy. The correct option is ?

Discussion

3283.	Choose the correct option:
Answer» Choose the correct option:

Discussion

3284.	Why there is no mesomeric effect at meta position ?
Answer» Why there is no mesomeric effect at meta position ?

Discussion

3285.	When a solution is added to vanilla extract, then the characteristic smell of vanilla cannot be detected. State whether the given solution is an acid or a base.
Answer» When a solution is added to vanilla extract, then the characteristic smell of vanilla cannot be detected. State whether the given solution is an acid or a base.

Discussion

3286.	What is breaking and making of bonds in chemical reaction called
Answer» What is breaking and making of bonds in chemical reaction called

Discussion

3287.	If the concentration of hydronium ions in a solution is 10−4 M, then the pH of this solution is:4
Answer» If the concentration of hydronium ions in a solution is $10^{- 4} M$ , then the pH of this solution is: 4

Discussion

3288.	what is ionic and covalent bond?
Answer» what is ionic and covalent bond?

Discussion

3289.	It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.
Answer» It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.

Discussion

3290.	Why n factor for mohr salt is 1.
Answer» Why n factor for mohr salt is 1.

Discussion

3291.	For the reaction below, P isC6H5CN+H2/Ni→P
Answer» For the reaction below, $P$ is $C_{6} H_{5} C N + H_{2} / N i \to P$

Discussion

3292.	Outline the steps required to convert hydrogen chloride to anhydrous FeCl3. Write equations for the reactions involved.
Answer» Outline the steps required to convert hydrogen chloride to anhydrous FeCl₃. Write equations for the reactions involved.

Discussion

3293.	In which of the following paramagnetic complex have pairing energy (P) is lower than splitting energy (Δ).(1) [NiF6]2–(2) [Co(H2O)6]3⊕(3) [Cr(H2O)6]3+(4) [RuF6]3–
Answer» In which of the following paramagnetic complex have pairing energy (P) is lower than splitting energy (Δ). (1) [NiF6]2– (2) [Co(H2O)6]3⊕ (3) [Cr(H2O)6]3+ (4) [RuF6]3–

Discussion

3294.	43. Calculate pH of 0.2M acetic acid which is 1% ionised in presence of 0.2M HCl
Answer» 43. Calculate pH of 0.2M acetic acid which is 1% ionised in presence of 0.2M HCl

Discussion

3295.	Freezing of water is a:
Answer» Freezing of water is a:

Discussion

3296.	___ is the process of extraction of metals from their ores.
Answer» ___ is the process of extraction of metals from their ores.

Discussion

3297.	Which of the following metal exists in the liquid state?(a) Na (b) Ag (c) Cr (d) Hg
Answer» Which of the following metal exists in the liquid state? (a) Na (b) Ag (c) Cr (d) Hg

Discussion

3298.	Which pair of elements has maximum electronegativity difference?
Answer» Which pair of elements has maximum electronegativity difference?

Discussion

3299.	The Ksp of Ag2CrO4, AgCl, AgBr AgI are respectively, 1.1×10−12, 1.8×10−10, 5.0×10−13, 8.3×10−17. Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na2CrO4?
Answer» The $K_{s p}$ of $A g_{2} C r O_{4}, A g C l, A g B r AgI$ are respectively, $1.1 \times 10^{- 12}, 1.8 \times 10^{- 10}, 5.0 \times 10^{- 13}, 8.3 \times 10^{- 17}$ . Which one of the following salts will precipitate last if $A g N O_{3}$ solution is added to the solution containing equal moles of $N a C l, N a B r, N a I and N a_{2} C r O_{4}$ ?

Discussion

3300.	If the molar conductance values of Ca2+ and Cl− at infinite dilution are respectively 118.88×10−4 m2 mho mol−1 and 77.33×10−4 m2 mho mol−1, then that of CaCl2 (in m2 mho mol−1) is:
Answer» If the molar conductance values of $C a^{2 +}$ and $C l^{-}$ at infinite dilution are respectively $118.88 \times 10^{- 4} m^{2} {mho mol}^{- 1}$ and $77.33 \times 10^{- 4} m^{2} {mho mol}^{- 1}$ , then that of $C a C l_{2}$ $(in m^{2} {mho mol}^{- 1})$ is:

Discussion

Explore topic-wise InterviewSolutions in .

what is derived name of neopentyl alcohol?1.isopropyl carbinol2.n-butyl carbinol3.tertiary butyl carbinol4.ethyl methyl carbinol

What is difference in word iso and seconary

which element is largest in size and why ? 1. Co(cobalt) 2. Ni(nickel) 3. Cu(copper) 4. Zn(zinc)

The number of moles of molecules present in 288 g of oxygen gas is:

Calculate the number of hydrogens present in an alkane, containing 15 carbons atoms.

What would you observe when : (a) blue litmus is introduced into a solution of hydrogen chloride gas, (b) red litmus paper is introduced into a solution of ammonia in water, (c) red litmus paper is introduced in caustic soda solution?

Fresh milk has a pH of 6. When milk changes into curd, the pH value will : (a) become 7 (b) become less than 6 (c) become more than 7 (d) remain unchanged

How to balance NH3+O2=NO+H2O by algebraic method

An element ‘X’ has an atomic mass number = 27. If the number of electrons = 13. Then the number of neutrons will be _____.

Draw neat labelled diagrams to show the hydrophobic and hydrophilic ends of a soap and micelle. [3 MARKS]

In the following electronic configuration, some rules have been violated:I:Hund II: Pauli’s exclusionIII: Aufbau

Number of water molecules present in one formula unit of a salt is called__.

Which gas is formed when an amphoteric metal reacts with a strong base?

The number of carbon atoms joined in a spherical molecule of buckministerfullerene is : (a) fifty (b) sixty (c) seventy (d) ninety

Why detergent is more efficient in hard water but not washing soda?

Give reasons : Iron sheets are cleaned with hydrochloric acid before dipping into molten zinc for galvanizing.

A solution reacts with crushed egg shells to give a gas that turns lime water milky. The solution contains what?

Explain the structures of (a) Hydronium ion, and (b) Ammonium ion.

As magnesium do not react with water then when we placed magnesium inside the cold water then the evolution of hydrogen gas takes place. Why ?

Why do elements gain/lose electrons to form compounds?

What is the difference between alcohols and base as both of them have OH- attached to them?

The property due to which a substance abosrbs moisture and dissolves in it is called

Which one of the following pollutants is produced by combustion of coal, petrol and diesel?

how to learn order in chemistry like density , ionisation inthalpy , radius , melting and boiling pts , electro positive and negative

What is the actual difference between ionization energy and successive ionization energy?

The hydrated salt of Na2CO3.xH2O undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is

Magnetic quantum number signifies

Why does Gentian violet have a positive charge?

What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.

5p,4d,5fand6p orbitals are arranged in the order of decreasing energy. The correct option is ?

Choose the correct option:

Why there is no mesomeric effect at meta position ?​

When a solution is added to vanilla extract, then the characteristic smell of vanilla cannot be detected. State whether the given solution is an acid or a base.

What is breaking and making of bonds in chemical reaction called

If the concentration of hydronium ions in a solution is 10−4 M, then the pH of this solution is:4

what is ionic and covalent bond?

It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain. ​

Why n factor for mohr salt is 1.

For the reaction below, P isC6H5CN+H2/Ni→P

Outline the steps required to convert hydrogen chloride to anhydrous FeCl3. Write equations for the reactions involved.

In which of the following paramagnetic complex have pairing energy (P) is lower than splitting energy (Δ).(1) [NiF6]2–(2) [Co(H2O)6]3⊕(3) [Cr(H2O)6]3+(4) [RuF6]3–

43. Calculate pH of 0.2M acetic acid which is 1% ionised in presence of 0.2M HCl

Freezing of water is a:

___ is the process of extraction of metals from their ores.

Which of the following metal exists in the liquid state?(a) Na (b) Ag (c) Cr (d) Hg

Which pair of elements has maximum electronegativity difference?

The Ksp of Ag2CrO4, AgCl, AgBr AgI are respectively, 1.1×10−12, 1.8×10−10, 5.0×10−13, 8.3×10−17. Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na2CrO4?

If the molar conductance values of Ca2+ and Cl− at infinite dilution are respectively 118.88×10−4 m2 mho mol−1 and 77.33×10−4 m2 mho mol−1, then that of CaCl2 (in m2 mho mol−1) is:

Why there is no mesomeric effect at meta position ?

It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.