10223 + Interview Questions in Chemistry Page 122 InterviewSolution

6051.	Carbon monoxide, sulfur dioxide and particulates are all examples of ___ air pollutants.
Answer» Carbon monoxide, sulfur dioxide and particulates are all examples of ___ air pollutants.

Discussion

6052.	Give a brief description of the principles of the following techniques taking an example in each case. (a) Crystallisation (b) Distillation (c) Chromatography
Answer» Give a brief description of the principles of the following techniques taking an example in each case. (a) Crystallisation (b) Distillation (c) Chromatography

6052.

Give a brief description of the principles of the following techniques taking an example in each case. (a) Crystallisation (b) Distillation (c) Chromatography

Answer»

Give a brief
description of the principles of the following techniques taking an
example in each case.

(a) Crystallisation
(b) Distillation (c) Chromatography

Discussion

6053.	The chemical formula of calcium hydroxide is _________.
Answer» The chemical formula of calcium hydroxide is _________.

Discussion

6054.	Question 2 (i)Write down the names of compounds represented by the following formulae:(i) Al2(SO4)3
Answer» Question 2 (i) Write down the names of compounds represented by the following formulae: $(i) A l_{2} (S O_{4})_{3}$

Discussion

6055.	A burning candle shows both physical and chemical changes. Explain ?
Answer» A burning candle shows both physical and chemical changes. Explain ?

Discussion

6056.	Chromatography
Answer» Chromatography

Discussion

6057.	concentration of h+ ions when a weak acid HA of 0.1M is added to 0.1 M hcl is
Answer» concentration of h+ ions when a weak acid HA of 0.1M is added to 0.1 M hcl is

Discussion

6058.	Name the three lanthanides which show +2 oxidation state also :(1) Sm, Tb, Gd(2) Sm, Eu, Yb(3) La, Gd, Lu(4) Yb, Pm, Sm
Answer» Name the three lanthanides which show +2 oxidation state also : (1) Sm, Tb, Gd (2) Sm, Eu, Yb (3) La, Gd, Lu (4) Yb, Pm, Sm

Discussion

6059.	The following substances contain _______.
Answer» The following substances contain _______.

Discussion

6060.	when will be slope zero and undefined explain with help of graph ?
Answer» when will be slope zero and undefined explain with help of graph ?

Discussion

6061.	A vessel contains equal number of hydrogen and oxygen molecules at one atmospheric pressure. The avg number of collisions per second at the walls of the vessel by hydrogen molecules is how many times the avg number of collisions per second at the walls of the vessel by oxygen molecules??
Answer» A vessel contains equal number of hydrogen and oxygen molecules at one atmospheric pressure. The avg number of collisions per second at the walls of the vessel by hydrogen molecules is how many times the avg number of collisions per second at the walls of the vessel by oxygen molecules??

Discussion

6062.	What is a symbol of the element Gold?
Answer» What is a symbol of the element Gold?

Discussion

6063.	Complete the following statements by selecting the correct option : (a) The formula of a compound represents (i) an atom (ii) a particle (iii) a molecule (iv) a combination. (b) The correct formula of aluminium oxide is (i) AIO3 (ii) AIO2 (iii) AI2O3 (c) The valency of nitrogen in nitrogen dioxide (NO2) is (i) one (ii) two (v) three (iv) four.
Answer» Complete the following statements by selecting the correct option : (a) The formula of a compound represents (i) an atom (ii) a particle (iii) a molecule (iv) a combination. (b) The correct formula of aluminium oxide is (i) AIO $_{3}$ (ii) AIO $_{2}$ (iii) AI $_{2}$ O $_{3}$ (c) The valency of nitrogen in nitrogen dioxide (NO $_{2}$ ) is (i) one (ii) two (v) three (iv) four.

6063.

Complete the following statements by selecting the correct option : (a) The formula of a compound represents (i) an atom (ii) a particle (iii) a molecule (iv) a combination. (b) The correct formula of aluminium oxide is (i) AIO3 (ii) AIO2 (iii) AI2O3 (c) The valency of nitrogen in nitrogen dioxide (NO2) is (i) one (ii) two (v) three (iv) four.

Answer»

Complete the following statements by selecting the correct option :

(a) The formula of a compound represents

(i) an atom (ii) a particle

(iii) a molecule (iv) a combination.

(b) The correct formula of aluminium oxide is

(i) AIO $_{3}$ (ii) AIO $_{2}$ (iii) AI $_{2}$ O $_{3}$

(c) The valency of nitrogen in nitrogen dioxide (NO $_{2}$ ) is

(i) one (ii) two

(v) three (iv) four.

Discussion

6064.	what is konowaloff"s rule
Answer» what is konowaloff"s rule

Discussion

6065.	Which of the following reaction requires light?
Answer» Which of the following reaction requires light?

Discussion

6066.	Which of the following elements are present in PVC?
Answer» Which of the following elements are present in PVC?

Discussion

6067.	When an increase stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation ?
Answer» When an increase stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation ?

Discussion

6068.	Why bond energy increases with bond multiplicity?
Answer» Why bond energy increases with bond multiplicity?

Discussion

6069.	25. A sample of H-atoms having electron s in the ground state is exposed to high energy rays of quantum energy13.3875 eV. The H-atoms absorb the energy and get excited. When the electron drops from excited state tothe ground state, how many lines are seen in the emission spectrum of hydrogen?
Answer» 25. A sample of H-atoms having electron s in the ground state is exposed to high energy rays of quantum energy13.3875 eV. The H-atoms absorb the energy and get excited. When the electron drops from excited state tothe ground state, how many lines are seen in the emission spectrum of hydrogen?

Discussion

6070.	. Which main group elements have a different numberof outermost electrons than its group number ofMendeelev's periodic table?(1) Noble gases 2) Halogens(3):0x gen family (4)", Nitrogen family
Answer» . Which main group elements have a different numberof outermost electrons than its group number ofMendeelev's periodic table?(1) Noble gases 2) Halogens(3):0x gen family (4)", Nitrogen family

Discussion

6071.	azimuthal quantum number for the last electron in Na
Answer» azimuthal quantum number for the last electron in Na

Discussion

6072.	Boron is a :
Answer» Boron is a :

Discussion

6073.	What's the definition of dilution?
Answer» What's the definition of dilution?

Discussion

6074.	43. An electron in the hydrogen atom absorbs energy and jumps to 5th orbit.It jumps back to ground state. Total number of lines obtained in Balmer series are 1) 2 2) 3 3) 1 4) 6
Answer» 43. An electron in the hydrogen atom absorbs energy and jumps to 5th orbit.It jumps back to ground state. Total number of lines obtained in Balmer series are 1) 2 2) 3 3) 1 4) 6

Discussion

6075.	Identify homogeneous mixtures from the following.
Answer» Identify homogeneous mixtures from the following.

Discussion

6076.	In the following reaction O_3 + 6I^{- }+ 6H^+→ 3I_{2 }+ 3H_2O Equivalent weight of O_3 ( with molecular weight M) is- (A) M/2 (B) M/4 (C) M/24 (D) M/6
Answer» In the following reaction O_3 + 6I^{- }+ 6H^+→ 3I_{2 }+ 3H_2O Equivalent weight of O_3 ( with molecular weight M) is- (A) M/2 (B) M/4 (C) M/24 (D) M/6

Discussion

6077.	Appu’s father plans on opening an Anthurium flower farm. He read that Anthurium plants require soils with good water absorption capacity along with good aeration. He has three choices: Clayey soil, Sandy Loam soil and coco peat (an artificial soil made from coconut husks). He took 50 g of each soil and determined the volume of water it absorbed. He also determined the soil particle size using a microscope and tabulated the results. Soil TypeVolume of water absorbed by 50g of soilParticle sizeClayey35 ml0.002 mmSandy Loam15 ml1 mmCoco Peat350 ml1 mm Which soil should Appu’s father choose?
Answer» Appu’s father plans on opening an Anthurium flower farm. He read that Anthurium plants require soils with good water absorption capacity along with good aeration. He has three choices: Clayey soil, Sandy Loam soil and coco peat (an artificial soil made from coconut husks). He took 50 g of each soil and determined the volume of water it absorbed. He also determined the soil particle size using a microscope and tabulated the results. $\begin{matrix} Soil Type & Volume of water absorbed by 50g of soil & Particle size Clayey & 35 ml & 0.002 mm Sandy Loam & 15 ml & 1 mm Coco Peat & 350 ml & 1 mm \end{matrix}$ Which soil should Appu’s father choose?

6077.

Appu’s father plans on opening an Anthurium flower farm. He read that Anthurium plants require soils with good water absorption capacity along with good aeration. He has three choices: Clayey soil, Sandy Loam soil and coco peat (an artificial soil made from coconut husks). He took 50 g of each soil and determined the volume of water it absorbed. He also determined the soil particle size using a microscope and tabulated the results. Soil TypeVolume of water absorbed by 50g of soilParticle sizeClayey35 ml0.002 mmSandy Loam15 ml1 mmCoco Peat350 ml1 mm Which soil should Appu’s father choose?

Answer»

Appu’s father plans on opening an Anthurium flower farm. He read that Anthurium plants require soils with good water absorption capacity along with good aeration. He has three choices: Clayey soil, Sandy Loam soil and coco peat (an artificial soil made from coconut husks). He took 50 g of each soil and determined the volume of water it absorbed. He also determined the soil particle size using a microscope and tabulated the results.

$\begin{matrix} Soil Type & Volume of water absorbed by 50g of soil & Particle size Clayey & 35 ml & 0.002 mm Sandy Loam & 15 ml & 1 mm Coco Peat & 350 ml & 1 mm \end{matrix}$

Which soil should Appu’s father choose?

Discussion

6078.	A farmer while cultivating his farm by mistake added a lot of pesticides with a pH 2 into the soil. What will be the effect on his crops?
Answer» A farmer while cultivating his farm by mistake added a lot of pesticides with a pH 2 into the soil. What will be the effect on his crops?

Discussion

6079.	why on adding inert gas at constant volume there is no effect on state of equilibrium
Answer» why on adding inert gas at constant volume there is no effect on state of equilibrium

Discussion

6080.	Pick the odd one out.
Answer» Pick the odd one out.

Discussion

6081.	Which of the given compounds does not react with dilute HCl at high temperature?
Answer» Which of the given compounds does not react with dilute HCl at high temperature?

Discussion

6082.	which is more acidic and why:4-methoxy benzoic acid and 4-methyl benzoic acid
Answer» which is more acidic and why:4-methoxy benzoic acid and 4-methyl benzoic acid

Discussion

6083.	A 20 %(w/w) aqueous salt solution contains 150 g of water in it. How much water should be evaporated from it to make final concentration of 30 % (w/w)?
Answer» A $20 % (w / w)$ aqueous salt solution contains $150 g$ of water in it. How much water should be evaporated from it to make final concentration of $30 % (w / w)$ ?

Discussion

6084.	___ is the change of matter from solid state directly to gaseous state without going through the liquid state.
Answer» ___ is the change of matter from solid state directly to gaseous state without going through the liquid state.

Discussion

6085.	Food which we eat in our daily life is digested at regular intervals of time. This is a:
Answer» Food which we eat in our daily life is digested at regular intervals of time. This is a:

Discussion

6086.	where daltons atomic theory is explained?
Answer» where daltons atomic theory is explained?

Discussion

6087.	1. What do you mean by corrosion?2. Explain the process of rusting of iron?
Answer» 1. What do you mean by corrosion? 2. Explain the process of rusting of iron?

Discussion

6088.	how can HF be more polar and the strongest bond
Answer» how can HF be more polar and the strongest bond

Discussion

6089.	In the following reaction ∆H is: H2O(s) → H2O (l); ∆H = 6.00 kj mpl-1
Answer» In the following reaction ∆H is: H₂O(s) → H₂O (l); ∆H = 6.00 kj mpl^-1

6089.

In the following reaction ∆H is: H2O(s) → H2O (l); ∆H = 6.00 kj mpl-1

Answer»

In the following reaction ∆H is:

H₂O(s) → H₂O (l); ∆H = 6.00 kj mpl^-1

Discussion

6090.	38. for the homogenous reaction 2A = 4B + C given at time t pressure P1 and at infinity P2 Expression for rate constant K in term of P1 , P2 and t will be
Answer» 38. for the homogenous reaction 2A = 4B + C given at time t pressure P1 and at infinity P2 Expression for rate constant K in term of P1 , P2 and t will be

Discussion

6091.	The density of wood is 0.5 in C.G.S. system of\ast\ast kunits. The corresponding value in M.K.S. unit is(1) 500(2) 0.5(3) 5x10-(4) 5000
Answer» The density of wood is 0.5 in C.G.S. system of\ast\ast kunits. The corresponding value in M.K.S. unit is(1) 500(2) 0.5(3) 5x10-(4) 5000

Discussion

6092.	Pair of species which are isoelectronic as well as isostructural around central atom is(1) SF4,ClF4-(2)SO3,ClO3(3)XeO4,PO43-(4)ICl2-,XeF2
Answer» Pair of species which are isoelectronic as well as isostructural around central atom is (1) SF4,ClF4- (2)SO3,ClO3 (3)XeO4,PO43- (4)ICl2-,XeF2

Discussion

6093.	The maximum number of electrons that can be accommodated in the 4th energy
Answer» The maximum number of electrons that can be accommodated in the 4th energy

Discussion

6094.	The representation of chemical bonding in the water molecule is given below, what is the nature of the chemical bond?
Answer» The representation of chemical bonding in the water molecule is given below, what is the nature of the chemical bond?

6094.

The representation of chemical bonding in the water molecule is given below, what is the nature of the chemical bond?

Answer»

The representation of chemical bonding in the water molecule is given below, what is the nature of the chemical bond?

Discussion

6095.	Screening effect of Br and effective nuclear charge for valency electron
Answer» Screening effect of Br and effective nuclear charge for valency electron

Discussion

6096.	WHAT IS THE PLASMA STATE ?
Answer» WHAT IS THE PLASMA STATE ?

Discussion

6097.	oxygen consists of isotope O16, O17 and O18 and carbon consist of isotope C12 and C13. How many types of CO2 molecules can be formed ? option are (1) 6 (2) 12 (3) 5 (4) non
Answer» oxygen consists of isotope O16, O17 and O18 and carbon consist of isotope C12 and C13. How many types of CO2 molecules can be formed ? option are (1) 6 (2) 12 (3) 5 (4) non

Discussion

6098.	Question: At constant pressure a gas at -33 degree Celsius is heated to 127 degree Celsius. Find the percentage increase in the volume of gas.
Answer» Question: At constant pressure a gas at -33 degree Celsius is heated to 127 degree Celsius. Find the percentage increase in the volume of gas.

Discussion

6099.	Why the compound BF3 is stable however after forming the covalent bond boron contain only 6 electrons instead of 8 in its outermost shell.
Answer» Why the compound BF₃is stable however after forming the covalent bond boron contain only 6 electrons instead of 8 in its outermost shell.

Discussion

6100.	Question 1 Differentiate between homogeneous and heterogeneous mixtures with examples.
Answer» Question 1 Differentiate between homogeneous and heterogeneous mixtures with examples.

Discussion

Explore topic-wise InterviewSolutions in .

Carbon monoxide, sulfur dioxide and particulates are all examples of ___ air pollutants.

Give a brief description of the principles of the following techniques taking an example in each case. (a) Crystallisation (b) Distillation (c) Chromatography

The chemical formula of calcium hydroxide is _________.

Question 2 (i)Write down the names of compounds represented by the following formulae:(i) Al2(SO4)3

A burning candle shows both physical and chemical changes. Explain ?

Chromatography

concentration of h+ ions when a weak acid HA of 0.1M is added to 0.1 M hcl is

Name the three lanthanides which show +2 oxidation state also :(1) Sm, Tb, Gd(2) Sm, Eu, Yb(3) La, Gd, Lu(4) Yb, Pm, Sm

The following substances contain _______.

when will be slope zero and undefined explain with help of graph ?

A vessel contains equal number of hydrogen and oxygen molecules at one atmospheric pressure. The avg number of collisions per second at the walls of the vessel by hydrogen molecules is how many times the avg number of collisions per second at the walls of the vessel by oxygen molecules??

What is a symbol of the element Gold?

what is konowaloff"s rule

Which of the following reaction requires light?

Which of the following elements are present in PVC?

When an increase stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation ?

Why bond energy increases with bond multiplicity?

25. A sample of H-atoms having electron s in the ground state is exposed to high energy rays of quantum energy13.3875 eV. The H-atoms absorb the energy and get excited. When the electron drops from excited state tothe ground state, how many lines are seen in the emission spectrum of hydrogen?

. Which main group elements have a different numberof outermost electrons than its group number ofMendeelev's periodic table?(1) Noble gases 2) Halogens(3):0x gen family (4)", Nitrogen family

azimuthal quantum number for the last electron in Na

Boron is a :

What's the definition of dilution?

43. An electron in the hydrogen atom absorbs energy and jumps to 5th orbit.It jumps back to ground state. Total number of lines obtained in Balmer series are 1) 2 2) 3 3) 1 4) 6

Identify homogeneous mixtures from the following.

In the following reaction O_3 + 6I^{- }+ 6H^+→ 3I_{2 }+ 3H_2O Equivalent weight of O_3 ( with molecular weight M) is- (A) M/2 (B) M/4 (C) M/24 (D) M/6

A farmer while cultivating his farm by mistake added a lot of pesticides with a pH 2 into the soil. What will be the effect on his crops?

why on adding inert gas at constant volume there is no effect on state of equilibrium

Pick the odd one out.

Which of the given compounds does not react with dilute HCl at high temperature?

which is more acidic and why:4-methoxy benzoic acid and 4-methyl benzoic acid

A 20 %(w/w) aqueous salt solution contains 150 g of water in it. How much water should be evaporated from it to make final concentration of 30 % (w/w)?

___ is the change of matter from solid state directly to gaseous state without going through the liquid state.

Food which we eat in our daily life is digested at regular intervals of time. This is a:

where daltons atomic theory is explained?

1. What do you mean by corrosion?2. Explain the process of rusting of iron?

how can HF be more polar and the strongest bond

In the following reaction ∆H is: H2O(s) → H2O (l); ∆H = 6.00 kj mpl-1

38. for the homogenous reaction 2A = 4B + C given at time t pressure P1 and at infinity P2 Expression for rate constant K in term of P1 , P2 and t will be

The density of wood is 0.5 in C.G.S. system of\ast\ast kunits. The corresponding value in M.K.S. unit is(1) 500(2) 0.5(3) 5x10-(4) 5000

Pair of species which are isoelectronic as well as isostructural around central atom is(1) SF4,ClF4-(2)SO3,ClO3(3)XeO4,PO43-(4)ICl2-,XeF2

The maximum number of electrons that can be accommodated in the 4th energy

The representation of chemical bonding in the water molecule is given below, what is the nature of the chemical bond?

Screening effect of Br and effective nuclear charge for valency electron

WHAT IS THE PLASMA STATE ?

oxygen consists of isotope O16, O17 and O18 and carbon consist of isotope C12 and C13. How many types of CO2 molecules can be formed ? option are (1) 6 (2) 12 (3) 5 (4) non

Question: At constant pressure a gas at -33 degree Celsius is heated to 127 degree Celsius. Find the percentage increase in the volume of gas.

Why the compound BF3 is stable however after forming the covalent bond boron contain only 6 electrons instead of 8 in its outermost shell.

Question 1 Differentiate between homogeneous and heterogeneous mixtures with examples.