10223 + Interview Questions in Chemistry Page 41 InterviewSolution

2001.	Which cyclo compunds seem to have zero dipole moment but actually are polar molecules?
Answer» Which cyclo compunds seem to have zero dipole moment but actually are polar molecules?

Discussion

2002.	What is the mass of 3 moles of O2?
Answer» What is the mass of 3 moles of $O_{2}$ ?

Discussion

2003.	What is meant by a pure substance?
Answer» What is meant by a pure substance?

Discussion

2004.	A scientist who specializes in soil and crops is called?
Answer» A scientist who specializes in soil and crops is called?

Discussion

2005.	The mass of hydrated salt X is 124.5 grams and that of anhydrous salt as 88.5 grams. How many moles of water of crystallisation are present?
Answer» The mass of hydrated salt X is 124.5 grams and that of anhydrous salt as 88.5 grams. How many moles of water of crystallisation are present?

Discussion

2006.	what are the combustible gas
Answer» what are the combustible gas

Discussion

2007.	Question 34Fill in the blanks in the following statements. (a) Rutherford's alpha-particle scattering experiment lead to the discovery of the ___(b) Isotopes have the same ___ but different ___(c) Neon and chlorine have atomic numbers 10 and 17 Their valencieswill be ___ and ___ respectively. (d) The electronic configuration of silicon is ___ and that of sulphur is ___
Answer» Question 34 Fill in the blanks in the following statements. (a) Rutherford's alpha-particle scattering experiment lead to the discovery of the ___ (b) Isotopes have the same ___ but different ___ (c) Neon and chlorine have atomic numbers 10 and 17 Their valencies will be ___ and ___ respectively. (d) The electronic configuration of silicon is ___ and that of sulphur is ___

Discussion

2008.	Four vessels 1, 2, 3, and 4 are filled with the same liquid as shown. P1, P2, P3 and P4 are the pressures at the base of the vessels 1, 2, 3, and 4, respectively. Which of the following options is correct?
Answer» Four vessels 1, 2, 3, and 4 are filled with the same liquid as shown. $P_{1}, P_{2}, P_{3} and P_{4}$ are the pressures at the base of the vessels 1, 2, 3, and 4, respectively. Which of the following options is correct?

Discussion

2009.	Only carbon shares electron or all element can share electrons
Answer» Only carbon shares electron or all element can share electrons

Discussion

2010.	Which among the following elements are present in polythene?
Answer» Which among the following elements are present in polythene?

Discussion

2011.	The interconversion of a substance from one state of matter to another is an example of ___ change .
Answer» The interconversion of a substance from one state of matter to another is an example of ___ change .

Discussion

2012.	The elements of one short period of the periodic table are given below in order from left to right: Li Be B C O F Ne(a) To which period do these elements belong?(b) One element of this period is missing. Which is the missing element and where should it be placed?(c) Which one of the elements in this period shows the property of catenation?(d) Place the three elements, fluorine, beryllium and nitrogen, in the order of increasing electronegativity.(e) Which one of the above elements belong to the halogen series?
Answer» The elements of one short period of the periodic table are given below in order from left to right: Li Be B C O F Ne (a) To which period do these elements belong? (b) One element of this period is missing. Which is the missing element and where should it be placed? (c) Which one of the elements in this period shows the property of catenation? (d) Place the three elements, fluorine, beryllium and nitrogen, in the order of increasing electronegativity. (e) Which one of the above elements belong to the halogen series?

Discussion

2013.	15 mL of N10 NaOH solution completely neutralises 12 mL of H2SO4 solution. The normality of H2SO4 solution will be
Answer» $15 mL$ of $\frac{N}{10}$ $N a O H$ solution completely neutralises $12 mL$ of $H_{2} S O_{4}$ solution. The normality of $H_{2} S O_{4}$ solution will be

Discussion

2014.	State two observations which show that atom is not indivisible.
Answer» State two observations which show that atom is not indivisible.

Discussion

2015.	What is the molecular mass of a 50 g of a bcc crystal lattice of an element with density, ρ=10 g cm−3 and cell edge, a=200 pm ?Take NA=6×1023 mol−1
Answer» What is the molecular mass of a $50 g$ of a bcc crystal lattice of an element with density, $ρ = 10 g c m^{- 3}$ and cell edge, $a = 200 p m$ ? Take $N_{A} = 6 \times 10^{23} m o l^{- 1}$

Discussion

2016.	Element ABC crystallizes with atom A occupying the F-centres, atom B occupies the body -centres and atom C are present at the corners of the cube. What will be the formula of the compound?
Answer» Element ABC crystallizes with atom A occupying the F-centres, atom B occupies the body -centres and atom C are present at the corners of the cube. What will be the formula of the compound?

Discussion

2017.	Identify the compound which is a Bronsted Lowry base but not an Arrhenius base?
Answer» Identify the compound which is a Bronsted Lowry base but not an Arrhenius base?

Discussion

2018.	The concentration of H+ and concentration of OH- of a 0.1M aqueous solution of 2% ionised weak acid is
Answer» The concentration of H+ and concentration of OH- of a 0.1M aqueous solution of 2% ionised weak acid is

Discussion

2019.	IE of an element x is given below.find the position of element in perodic table and also predict the formula of the oxide and halide? IE1=X KJ/MOL IE2=3X KJ/MOL IE3=20X KJ/ MOL IE4=30X KJ/ MO
Answer» IE of an element x is given below.find the position of element in perodic table and also predict the formula of the oxide and halide? IE1=X KJ/MOL IE2=3X KJ/MOL IE3=20X KJ/ MOL IE4=30X KJ/ MO

Discussion

2020.	The number of nonbonding electron pairs in O_2 molecule is Options: a) 2 b) 6 c) 4 d) 8
Answer» The number of nonbonding electron pairs in O_2 molecule is Options: a) 2 b) 6 c) 4 d) 8

Discussion

2021.	Which of the following is true for the solution with the pH=0? 1. the OH ion concentration is smaller than the H+ ion concentration. 2.the OH ion concentration is greater than the H+ ion concentration. 3. the OH ion concentration is equal of the H+ ion concentration. 4. Such solution doesn't exist
Answer» Which of the following is true for the solution with the pH=0? 1. the OH ion concentration is smaller than the H+ ion concentration. 2.the OH ion concentration is greater than the H+ ion concentration. 3. the OH ion concentration is equal of the H+ ion concentration. 4. Such solution doesn't exist

Discussion

2022.	26. The six structures (I-VI) of molecules where X, Y, Z are atoms of different elements with different electronegativities, are shown below. The molecules are regular tetrahedral species. Assume the bond lengths in all the structures to be the same. Identify the pair(s) of structures of molecules in which both the members have the same magnitude of dipole moment. (A) I and III. (B) II and V. (C) IV and VI. (D) I and V.
Answer» 26. The six structures (I-VI) of molecules where X, Y, Z are atoms of different elements with different electronegativities, are shown below. The molecules are regular tetrahedral species. Assume the bond lengths in all the structures to be the same. Identify the pair(s) of structures of molecules in which both the members have the same magnitude of dipole moment. (A) I and III. (B) II and V. (C) IV and VI. (D) I and V.

Discussion

2023.	A sample containing 85 gm of NH3 is decomposed into nitrogen and hydrogen. The total amount of nitrogen and hydrogen present in 85 gm of the sample respectively are:
Answer» A sample containing 85 gm of NH₃ is decomposed into nitrogen and hydrogen. The total amount of nitrogen and hydrogen present in 85 gm of the sample respectively are:

Discussion

2024.	Which is not an isotope of hydrogen?
Answer» Which is not an isotope of hydrogen?

Discussion

2025.	Balance the following redox reaction by ion-electron method, which is taking place in Acidic Medium and explain in detail.Cl2O7 (g) + H2O2 (aq) --> ClO(2-) (aq) + O2 (g)
Answer» Balance the following redox reaction by ion-electron method, which is taking place in Acidic Medium and explain in detail. Cl2O7 (g) + H2O2 (aq) --> ClO(2-) (aq) + O2 (g)

Discussion

2026.	What method is adopted for the industrial preparation of nitrogen?
Answer» What method is adopted for the industrial preparation of nitrogen?

Discussion

2027.	18. An electrolyte AB is 50% ionised in aqueous solution calculate the freezing point of 1 molal aqueous solution.
Answer» 18. An electrolyte AB is 50% ionised in aqueous solution calculate the freezing point of 1 molal aqueous solution.

Discussion

2028.	When the difference in electronegativity of two elements in a compound is more than 1.7, what is the nature of the chemical bond?
Answer» When the difference in electronegativity of two elements in a compound is more than 1.7, what is the nature of the chemical bond?

Discussion

2029.	the environment of motif is same throughout the crystal except for on the surface. what does this mean ?
Answer» the environment of motif is same throughout the crystal except for on the surface. what does this mean ?

Discussion

2030.	The basicity of oleum is:
Answer» The basicity of oleum is:

Discussion

2031.	Question 4 (b)Explain the following giving examples. b. Pure substance
Answer» Question 4 (b) Explain the following giving examples. b. Pure substance

Discussion

2032.	7. Q1. What is the significance of the terms "isolated gaseous atom" and "ground state " while defining ionization enthalpy and electron gain enthalpy?
Answer» 7. Q1. What is the significance of the terms "isolated gaseous atom" and "ground state " while defining ionization enthalpy and electron gain enthalpy?

Discussion

2033.	48. The time T1 and t2 are time periods for one third and two third completion of to first order reactions. If the Half-Lives are in the ratio 10 is to 3 then the ratio of T1 and t2 will be
Answer» 48. The time T1 and t2 are time periods for one third and two third completion of to first order reactions. If the Half-Lives are in the ratio 10 is to 3 then the ratio of T1 and t2 will be

Discussion

2034.	At constant pressure, the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph.The volume of the gas at 300∘C is larger than that at 0∘C by a factor of
Answer» At constant pressure, the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph. The volume of the gas at 300 $^{\circ}$ C is larger than that at 0 $^{\circ}$ C by a factor of

2034.

At constant pressure, the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph.The volume of the gas at 300∘C is larger than that at 0∘C by a factor of

Answer»

At constant pressure, the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph.

The volume of the gas at 300 $^{\circ}$ C is larger than that at 0 $^{\circ}$ C by a factor of

Discussion

2035.	A formula is a __ among two or more variables.
Answer» A formula is a __ among two or more variables.

Discussion

2036.	Why does the reactivity of the halogens decreases down the group?
Answer» Why does the reactivity of the halogens decreases down the group?

Discussion

2037.	The number of S−S bonds in trithionic acid is
Answer» The number of $S - S$ bonds in trithionic acid is

Discussion

2038.	24. The reduction potential of hydrogen electrode in 0.01M H2SO4 solution at 1 ATM and 25 degree celcius will be equal to ?
Answer» 24. The reduction potential of hydrogen electrode in 0.01M H2SO4 solution at 1 ATM and 25 degree celcius will be equal to ?

Discussion

2039.	The molecular theory states that the pressure exerted by a gas in a closed vessel results from the gas molecules stiking against the walls of the vessel. How will the pressure change it: (a) the temperature is doubled keeping the volume constant? (b) the volume is made half of its original value keeping the temperature constant?
Answer» The molecular theory states that the pressure exerted by a gas in a closed vessel results from the gas molecules stiking against the walls of the vessel. How will the pressure change it: (a) the temperature is doubled keeping the volume constant? (b) the volume is made half of its original value keeping the temperature constant?

Discussion

2040.	State the law of conservation of mass.
Answer» State the law of conservation of mass.

Discussion

2041.	Freezing point of solid ammonia is ___ degree celsius.
Answer» Freezing point of solid ammonia is ___ degree celsius.

Discussion

2042.	Pl explain the pronciple of potentiometer in detail
Answer» Pl explain the pronciple of potentiometer in detail

Discussion

2043.	Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively.
Answer» Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively.

Discussion

2044.	Match the masses with their respective sub-atomic particles.
Answer» Match the masses with their respective sub-atomic particles.

Discussion

2045.	What is the characteristic of the reaction:MN + PQ → MQ + PNWhat is the general name given to such reactions?
Answer» What is the characteristic of the reaction: MN + PQ → MQ + PN What is the general name given to such reactions?

Discussion

2046.	9. The substance used as a smoke screen in warefare is (a) SiCl4 (b) PH3 (c) pcl5(d) acetylene
Answer» 9. The substance used as a smoke screen in warefare is (a) SiCl4 (b) PH3 (c) pcl5(d) acetylene

Discussion

2047.	Why symbol of iron is Fe
Answer» Why symbol of iron is Fe

Discussion

2048.	Polyatomic ion is:
Answer» Polyatomic ion is:

Discussion

2049.	Name two chemicals used to disinfect water
Answer» Name two chemicals used to disinfect water

Discussion

2050.	if 10 ml of H2SO4 is Mixed with 10 ml of Mg(OH)2 of the same concentration, what will be the product? Will the product be acidic , basic or neutral? What will be the PH range of the product?
Answer» if 10 ml of H2SO4 is Mixed with 10 ml of Mg(OH)2 of the same concentration, what will be the product? Will the product be acidic , basic or neutral? What will be the PH range of the product?

Discussion

Explore topic-wise InterviewSolutions in .

Which cyclo compunds seem to have zero dipole moment but actually are polar molecules?

What is the mass of 3 moles of O2?

What is meant by a pure substance?

A scientist who specializes in soil and crops is called?

The mass of hydrated salt X is 124.5 grams and that of anhydrous salt as 88.5 grams. How many moles of water of crystallisation are present?

what are the combustible gas

Four vessels 1, 2, 3, and 4 are filled with the same liquid as shown. P1, P2, P3 and P4 are the pressures at the base of the vessels 1, 2, 3, and 4, respectively. Which of the following options is correct?

Only carbon shares electron or all element can share electrons

Which among the following elements are present in polythene?

The interconversion of a substance from one state of matter to another is an example of ___ change .

15 mL of N10 NaOH solution completely neutralises 12 mL of H2SO4​ solution. The normality of H2SO4​ solution will be

State two observations which show that atom is not indivisible.

What is the molecular mass of a 50 g of a bcc crystal lattice of an element with density, ρ=10 g cm−3 and cell edge, a=200 pm ?Take NA=6×1023 mol−1

Element ABC crystallizes with atom A occupying the F-centres, atom B occupies the body -centres and atom C are present at the corners of the cube. What will be the formula of the compound?

Identify the compound which is a Bronsted Lowry base but not an Arrhenius base?

The concentration of H+ and concentration of OH- of a 0.1M aqueous solution of 2% ionised weak acid is

IE of an element x is given below.find the position of element in perodic table and also predict the formula of the oxide and halide? IE1=X KJ/MOL IE2=3X KJ/MOL IE3=20X KJ/ MOL IE4=30X KJ/ MO

The number of nonbonding electron pairs in O_2 molecule is Options: a) 2 b) 6 c) 4 d) 8

Which of the following is true for the solution with the pH=0? 1. the OH ion concentration is smaller than the H+ ion concentration. 2.the OH ion concentration is greater than the H+ ion concentration. 3. the OH ion concentration is equal of the H+ ion concentration. 4. Such solution doesn't exist

A sample containing 85 gm of NH3 is decomposed into nitrogen and hydrogen. The total amount of nitrogen and hydrogen present in 85 gm of the sample respectively are:

Which is not an isotope of hydrogen?

Balance the following redox reaction by ion-electron method, which is taking place in Acidic Medium and explain in detail.Cl2O7 (g) + H2O2 (aq) --> ClO(2-) (aq) + O2 (g)

What method is adopted for the industrial preparation of nitrogen?

18. An electrolyte AB is 50% ionised in aqueous solution calculate the freezing point of 1 molal aqueous solution.

When the difference in electronegativity of two elements in a compound is more than 1.7, what is the nature of the chemical bond?

the environment of motif is same throughout the crystal except for on the surface. what does this mean ?

The basicity of oleum is:

Question 4 (b)Explain the following giving examples. b. Pure substance

7. Q1. What is the significance of the terms "isolated gaseous atom" and "ground state " while defining ionization enthalpy and electron gain enthalpy?

48. The time T1 and t2 are time periods for one third and two third completion of to first order reactions. If the Half-Lives are in the ratio 10 is to 3 then the ratio of T1 and t2 will be

At constant pressure, the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph.The volume of the gas at 300∘C is larger than that at 0∘C by a factor of

A formula is a __ among two or more variables.

Why does the reactivity of the halogens decreases down the group?

The number of S−S bonds in trithionic acid is

24. The reduction potential of hydrogen electrode in 0.01M H2SO4 solution at 1 ATM and 25 degree celcius will be equal to ?

State the law of conservation of mass.

Freezing point of solid ammonia is ___ degree celsius.

Pl explain the pronciple of potentiometer in detail

Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively.

Match the masses with their respective sub-atomic particles.

What is the characteristic of the reaction:MN + PQ → MQ + PNWhat is the general name given to such reactions?

9. The substance used as a smoke screen in warefare is (a) SiCl4 (b) PH3 (c) pcl5(d) acetylene

Why symbol of iron is Fe

Polyatomic ion is:

Name two chemicals used to disinfect water

if 10 ml of H2SO4 is Mixed with 10 ml of Mg(OH)2 of the same concentration, what will be the product? Will the product be acidic , basic or neutral? What will be the PH range of the product?

15 mL of N10 NaOH solution completely neutralises 12 mL of H2SO4 solution. The normality of H2SO4 solution will be