46295 + Interview Questions in Chemistry Page 32 InterviewSolution

1551.	H3PO4+Ca(OH)2 GIVES CaHPO4+2H2O EQUIVALENT MASS OF H3PO4 IS
Answer» H3PO4+Ca(OH)2 GIVES CaHPO4+2H2O EQUIVALENT MASS OF H3PO4 IS

Discussion

1552.	in naphthalene 1 ring contains NH2 group and 1 contain CN group so at which ring and at what position electrophile will attack
Answer» in naphthalene 1 ring contains NH2 group and 1 contain CN group so at which ring and at what position electrophile will attack

Discussion

1553.	The pressure of 1 g of an ideal gas A at 300 K is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at the same temperature, the pressure becomes 3 bar. Which of the following is correct? (mA = mass of gas A; mB = mass of gas B)
Answer» The pressure of $1 g$ of an ideal gas $A$ at $300 K$ is found to be 2 bar. When $2 g$ of another ideal gas $B$ is introduced in the same flask at the same temperature, the pressure becomes 3 bar. Which of the following is correct? ( $m_{A}$ = mass of gas A; $m_{B}$ = mass of gas B)

Discussion

1554.	"Thus we can conclude that electrons are basic constituents of all the atoms" explain the statemen
Answer» "Thus we can conclude that electrons are basic constituents of all the atoms" explain the statemen

Discussion

1555.	The lanthanide that would show colour is:
Answer» The lanthanide that would show colour is:

Discussion

1556.	C6H5CHO + C6H5COCH3 +CH3COCH3 +(OH) what will be the major product?
Answer» C6H5CHO + C6H5COCH3 +CH3COCH3 +(OH) what will be the major product?

Discussion

1557.	The sum of the number of water molecules in gypsum and plaster of paris is:
Answer» The sum of the number of water molecules in gypsum and plaster of paris is:

Discussion

1558.	Which of the following compounds has the most acidic nature?
Answer» Which of the following compounds has the most acidic nature?

Discussion

1559.	Match each of the compounds in Column I with its characteristic reaction(s) in Column II. ColumnIColumnIIA.CH3CH2CH2CN:(P)Reduction with Pd−C/H2B.CH3Ch2OCOCH3:(q)Reduction with SnCl2/HClC.CH3CH=CHCH2OH(r)Development of foul smell on treatmentwith chloroform and alcoholic KOHD.CH3CH2CH2CH2NH2(s)Reduction with di−isobutylaluminium hydride (DIBAL−H).
Answer» Match each of the compounds in Column I with its characteristic reaction(s) in Column II. $\begin{matrix} C o l u m n I & C o l u m n I I A . C H_{3} C H_{2} C H_{2} C N : & (P) R e d u c t i o n w i t h P d - C / H_{2} B . C H_{3} C h_{2} O C O C H_{3} : & (q) R e d u c t i o n w i t h S n C l_{2} / H C l C . C H_{3} C H = C H C H_{2} O H & (r) D e v e l o p m e n t o f f o u l s m e l l o n t r e a t m e n t w i t h c h l o r o f o r m a n d a l c o h o l i c K O H D . C H_{3} C H_{2} C H_{2} C H_{2} N H_{2} & (s) R e d u c t i o n w i t h d i - i s o b u t y l a l u m i n i u m h y d r i d e (D I B A L - H) . \end{matrix}$

Discussion

1560.	Which of the following option is not a functional group for halo compounds?
Answer» Which of the following option is not a functional group for halo compounds?

Discussion

1561.	The molecular formula of amine is C4H11N. Then ratio of 10, 20 and 30 isomeric amines possible are (structural isomers only)
Answer» The molecular formula of amine is C₄H₁₁N. Then ratio of 1⁰, 2⁰ and 3⁰ isomeric amines possible are (structural isomers only)

Discussion

1562.	HgCl2 and I2 both when dissolved in water containing I− ions the pair of species formed is :
Answer» $H g C l_{2} and I_{2}$ both when dissolved in water containing $I^{-}$ ions the pair of species formed is :

Discussion

1563.	Ligand in a complex compound
Answer» Ligand in a complex compound

Discussion

1564.	15.If specific heat of a metal is 0.16 calorie per gram its approximate atomic weight would be
Answer» 15.If specific heat of a metal is 0.16 calorie per gram its approximate atomic weight would be

Discussion

1565.	What is the shape of Fe(CO)5 molecule and which of the following d - orbitals involved in hybridization?
Answer» What is the shape of $F e (C O)_{5}$ molecule and which of the following d - orbitals involved in hybridization?

Discussion

1566.	IN C3O2 ,THE HYBRIDISATION STATE OF "C" IS A) SP2 B) SP C) SP3 D) DSP2
Answer» IN C3O2 ,THE HYBRIDISATION STATE OF "C" IS A) SP2 B) SP C) SP3 D) DSP2

Discussion

1567.	what is diatoms arrrangement ?explain with the help of diagra
Answer» what is diatoms arrrangement ?explain with the help of diagra

Discussion

1568.	the density of 2m aqueos sol of naoh is 1.28 g/cm3.the molality of the soln will be 1. 1.322. 1,203. 1.564.1.67
Answer» the density of 2m aqueos sol of naoh is 1.28 g/cm3.the molality of the soln will be 1. 1.32 2. 1,20 3. 1.56 4.1.67

Discussion

1569.	The order of reactivity of the given haloalkanes towards nucleophile is
Answer» The order of reactivity of the given haloalkanes towards nucleophile is

Discussion

1570.	Two radioactive materials A1 and A2 have decay constants of 10λ0 and λ0. If initially they have same number of nuclei, the ratio of number of their decayed nuclei will be (1e) after a time
Answer» Two radioactive materials $A_{1}$ and $A_{2}$ have decay constants of $10 λ_{0}$ and $λ_{0}$ . If initially they have same number of nuclei, the ratio of number of their decayed nuclei will be $(\frac{1}{e})$ after a time

Discussion

1571.	Vapour pressure of CCl4 at 250C is 143mm of Hg. 0.5 gm of a non-volatile solute (mol. wt. = 65) is dissolved in 100ml CCl4. Find the vapour pressure of the solution (Density of CCl4=1.58g/cm2)
Answer» Vapour pressure of CCl₄ at 25⁰C is 143mm of Hg. 0.5 gm of a non-volatile solute (mol. wt. = 65) is dissolved in 100ml CCl₄. Find the vapour pressure of the solution (Density of CCl₄=1.58g/cm²)

Discussion

1572.	______grams of 3-Hydroxy propanal (M.W = 74 g/mol) must be dehydrated to produce 7.8 g of acrolein (M.W = 56 g/mol) (C3H4O) if the percentage yield is 64. (Round off to the Nearest Integer).[Given: Atomic masses: C : 12.0 u, H : 1.0 u, O : 16.0 u]
Answer» ______grams of 3-Hydroxy propanal (M.W = 74 g/mol) must be dehydrated to produce $7.8 g$ of acrolein (M.W = 56 g/mol) $(C_{3} H_{4} O)$ if the percentage yield is 64. (Round off to the Nearest Integer). [Given: Atomic masses: C : 12.0 u, H : 1.0 u, O : 16.0 u]

Discussion

1573.	4. How many electrons should X2H4 liberate so that in the new compound X shows oxidation number of -1/2 ( E.N. X > H) 1) 10 2) 4 3) 3 4) 2
Answer» 4. How many electrons should X2H4 liberate so that in the new compound X shows oxidation number of -1/2 ( E.N. X > H) 1) 10 2) 4 3) 3 4) 2

Discussion

1574.	Liquid benzene (CHe) burns in oxygen accordingto 2CsH6() + 1502(g)12CO2(g)+ 6H20(g)How many litres of O2 at STP are needed tocomplete the combustion of 39 g of liquid benzene?(1) 74 L(3) 22.4 L(2) 11.2 L(4) 84 L
Answer» Liquid benzene (CHe) burns in oxygen accordingto 2CsH6() + 1502(g)12CO2(g)+ 6H20(g)How many litres of O2 at STP are needed tocomplete the combustion of 39 g of liquid benzene?(1) 74 L(3) 22.4 L(2) 11.2 L(4) 84 L

Discussion

1575.	Select those species for which white fumes appear on heating :-BeCl2·4H2O, MgCl2·6H2O, CaCl2·6H2O, SrCl2·6H2O
Answer» Select those species for which white fumes appear on heating :- BeCl2·4H2O, MgCl2·6H2O, CaCl2·6H2O, SrCl2·6H2O

Discussion

1576.	In which case, van’t Hoff factor i remainsunchanged ?(a) PtCl4 reacts with aq. KCl(b) aq. ZnCl2 reacts with aq. NH3(c) aq. FeCl3 reacts with aq. K4[Fe(CN)]6(d) KMnO4 reduced to MnO2 in alkalinemedium
Answer» In which case, van’t Hoff factor i remains unchanged ? (a) PtCl4 reacts with aq. KCl (b) aq. ZnCl2 reacts with aq. NH3 (c) aq. FeCl3 reacts with aq. K4 [Fe(CN)]6 (d) KMnO4 reduced to MnO2 in alkaline medium

Discussion

1577.	88 Which of the following will undergo Cannizaro's reaction? A. CCl3CHO B. (CH3)3CCHO C. CH3CH2CHO D. Both A & B
Answer» 88 Which of the following will undergo Cannizaro's reaction? A. CCl3CHO B. (CH3)3CCHO C. CH3CH2CHO D. Both A & B

Discussion

1578.	Molarity of H2SO4 is 18 M. Its density is 1.8 g/cm3 hence molality is
Answer» Molarity of $H_{2} S O_{4}$ is 18 M. Its density is 1.8 $g / c m^{3}$ hence molality is

Discussion

1579.	37. how hybridization pf phosphorous atom comes sp3 in p4 molecule while it makes bond only by p orbitals? SAME THING FOR PH3 MOLECULE TOO?
Answer» 37. how hybridization pf phosphorous atom comes sp3 in p4 molecule while it makes bond only by p orbitals? SAME THING FOR PH3 MOLECULE TOO?

Discussion

1580.	Not considering the electron spin, the degeneracy of the second excited state n=3, of H atom is 9, while the degeneracy of the second excited state of H− is:
Answer» Not considering the electron spin, the degeneracy of the second excited state $n = 3$ , of $H$ atom is $9$ , while the degeneracy of the second excited state of $H^{-}$ is:

Discussion

1581.	Which of the following conversions is known as Stephen’s reduction?
Answer» Which of the following conversions is known as Stephen’s reduction?

Discussion

1582.	Explain tautomerism in full details
Answer» Explain tautomerism in full details

Discussion

1583.	Which set of products are expected on reductive ozonolysis of the following diolefin?
Answer» Which set of products are expected on reductive ozonolysis of the following diolefin?

Discussion

1584.	Which of the following compound(s) give(s) the Cannizzaro reaction?
Answer» Which of the following compound(s) give(s) the Cannizzaro reaction?

Discussion

1585.	99.How to calculate Z- effective of Helium?
Answer» 99.How to calculate Z- effective of Helium?

Discussion

1586.	The cryoscopic constant for acetic acid is 3.6 Kkg/mol. A solution of 1 g of a hydrocarbon in 100 g of acetic acid freezes at 16.14 ∘C instead of the usual 16.60 ∘C. The hydrocarbon contains 92.3% carbon. What is its molecular formula?
Answer» The cryoscopic constant for acetic acid is $3.6 Kkg/mol$ . A solution of $1 g$ of a hydrocarbon in $100 g$ of acetic acid freezes at $16.14^{\circ} C$ instead of the usual $16.60^{\circ} C$ . The hydrocarbon contains 92.3% carbon. What is its molecular formula?

Discussion

1587.	A liquid is in equilibrium with its vapour at its equilibrium point . On an average the molecules in two phases have equal A_potential energy. B_kinetic energy C_Total energy D_Intermolecular forces
Answer» A liquid is in equilibrium with its vapour at its equilibrium point . On an average the molecules in two phases have equal A_potential energy. B_kinetic energy C_Total energy D_Intermolecular forces

1587.

A liquid is in equilibrium with its vapour at its equilibrium point . On an average the molecules in two phases have equal A_potential energy. B_kinetic energy C_Total energy D_Intermolecular forces

Answer»

A liquid is in equilibrium with its vapour at its equilibrium point . On an average the molecules in two phases have equal

A_potential energy. B_kinetic energy C_Total energy D_Intermolecular forces

Discussion

1588.	Ascorbic acid (C6H8O6) is a common antioxidant that protects our bodies against radicals. In the redox equation below that occurs in our stomach, which of the following pairs identifies the reducing and oxidizing agents respectively? C6H8O6+2H++2NO−2→C6H6O6+2H2O+2NO
Answer» Ascorbic acid $(C_{6} H_{8} O_{6})$ is a common antioxidant that protects our bodies against radicals. In the redox equation below that occurs in our stomach, which of the following pairs identifies the reducing and oxidizing agents respectively? $C_{6} H_{8} O_{6} + 2 H^{+} + 2 N O_{2}^{-} \to C_{6} H_{6} O_{6} + 2 H_{2} O + 2 N O$

Discussion

1589.	what's definition of work
Answer» what's definition of work

Discussion

1590.	where did the noble gases lie in Lother Meyer's curve?
Answer» where did the noble gases lie in Lother Meyer's curve?

Discussion

1591.	Which of the following elements is a member of the hydride gap?
Answer» Which of the following elements is a member of the hydride gap?

Discussion

1592.	The radius of a calcium ion is 94 pm and of an oxide ion is 146 pm. Predict the crystal structure of calcium oxide.
Answer» The radius of a calcium ion is 94 pm and of an oxide ion is 146 pm. Predict the crystal structure of calcium oxide.

Discussion

1593.	Question 39Ethene is formed when ethanol at 443k is heated with an excess of concentrated sulphuric acid. What is the role of sulphuric acid in this reaction? Write the balanced chemical equation for this reaction.
Answer» Question 39 Ethene is formed when ethanol at 443k is heated with an excess of concentrated sulphuric acid. What is the role of sulphuric acid in this reaction? Write the balanced chemical equation for this reaction.

Discussion

1594.	In rutile, the coordination number of the anion is ___
Answer» In rutile, the coordination number of the anion is ___

Discussion

1595.	The equilibrium constant expression for a gas reaction is, Kc=[NH3]4[O2]5[NO]4[H2O]6 Write the balanced chemical equation corresponding to this expression.
Answer» The equilibrium constant expression for a gas reaction is, $K_{c} = \frac{[N H_{3}]^{4} [O_{2}]^{5}}{[N O]^{4} [H_{2} O]^{6}}$ Write the balanced chemical equation corresponding to this expression.

Discussion

1596.	Discuss the shape ofthe following molecules using the VSEPR model:BeCl2,BCl3,SiCl4,AsF5,H2S,PH3
Answer» Discuss the shape of the following molecules using the VSEPR model: BeCl₂, BCl₃, SiCl₄, AsF₅, H₂S, PH₃

1596.

Discuss the shape ofthe following molecules using the VSEPR model:BeCl2,BCl3,SiCl4,AsF5,H2S,PH3

Answer»

Discuss the shape of
the following molecules using the VSEPR model:

BeCl₂,
BCl₃,
SiCl₄,
AsF₅,
H₂S,
PH₃

Discussion

1597.	A light source of wavelength λ illuminates a metal and Ejects photo electron with KE=1 kj.Another light source of wavelength λ/3 ,ejects photo-electrons from same metal with KE=4kj. Find the value of work function of metal.
Answer» A light source of wavelength λ illuminates a metal and Ejects photo electron with KE=1 kj.Another light source of wavelength λ/3 ,ejects photo-electrons from same metal with KE=4kj. Find the value of work function of metal.

Discussion

1598.	The possibility of finding an electron in an orbital was conceived by
Answer» The possibility of finding an electron in an orbital was conceived by

1598.

The possibility of finding an electron in an orbital was conceived by

Answer»

The possibility of finding an electron in an orbital was conceived by

Discussion

1599.	Why does 2p_{z }have sigma bonding? Shouldn't it have pi bonding?
Answer» Why does 2p_{z }have sigma bonding? Shouldn't it have pi bonding?

Discussion

1600.	Which of the following will be formed when KI is treated with H2O2 in neutral medium ?
Answer» Which of the following will be formed when KI is treated with $H_{2} O_{2}$ in neutral medium ?

Discussion

Explore topic-wise InterviewSolutions in .

H3PO4+Ca(OH)2 GIVES CaHPO4+2H2O EQUIVALENT MASS OF H3PO4 IS

in naphthalene 1 ring contains NH2 group and 1 contain CN group so at which ring and at what position electrophile will attack

The pressure of 1 g of an ideal gas A at 300 K is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at the same temperature, the pressure becomes 3 bar. Which of the following is correct? (mA = mass of gas A; mB = mass of gas B)

"Thus we can conclude that electrons are basic constituents of all the atoms" explain the statemen

The lanthanide that would show colour is:

C6H5CHO + C6H5COCH3 +CH3COCH3 +(OH) what will be the major product?

The sum of the number of water molecules in gypsum and plaster of paris is:

Which of the following compounds has the most acidic nature?

Which of the following option is not a functional group for halo compounds?

The molecular formula of amine is C4H11N. Then ratio of 10, 20 and 30 isomeric amines possible are (structural isomers only)

HgCl2 and I2 both when dissolved in water containing I− ions the pair of species formed is :

Ligand in a complex compound

15.If specific heat of a metal is 0.16 calorie per gram its approximate atomic weight would be

What is the shape of Fe(CO)5 molecule and which of the following d - orbitals involved in hybridization?

IN C3O2 ,THE HYBRIDISATION STATE OF "C" IS A) SP2 B) SP C) SP3 D) DSP2

what is diatoms arrrangement ?explain with the help of diagra

the density of 2m aqueos sol of naoh is 1.28 g/cm3.the molality of the soln will be 1. 1.322. 1,203. 1.564.1.67

The order of reactivity of the given haloalkanes towards nucleophile is

Two radioactive materials A1 and A2 have decay constants of 10λ0 and λ0. If initially they have same number of nuclei, the ratio of number of their decayed nuclei will be (1e) after a time

Vapour pressure of CCl4 at 250C is 143mm of Hg. 0.5 gm of a non-volatile solute (mol. wt. = 65) is dissolved in 100ml CCl4. Find the vapour pressure of the solution (Density of CCl4=1.58g/cm2)

______grams of 3-Hydroxy propanal (M.W = 74 g/mol) must be dehydrated to produce 7.8 g of acrolein (M.W = 56 g/mol) (C3H4O) if the percentage yield is 64. (Round off to the Nearest Integer).[Given: Atomic masses: C : 12.0 u, H : 1.0 u, O : 16.0 u]

4. How many electrons should X2H4 liberate so that in the new compound X shows oxidation number of -1/2 ( E.N. X > H) 1) 10 2) 4 3) 3 4) 2

Liquid benzene (CHe) burns in oxygen accordingto 2CsH6() + 1502(g)12CO2(g)+ 6H20(g)How many litres of O2 at STP are needed tocomplete the combustion of 39 g of liquid benzene?(1) 74 L(3) 22.4 L(2) 11.2 L(4) 84 L

Select those species for which white fumes appear on heating :-BeCl2·4H2O, MgCl2·6H2O, CaCl2·6H2O, SrCl2·6H2O

In which case, van’t Hoff factor i remainsunchanged ?(a) PtCl4 reacts with aq. KCl(b) aq. ZnCl2 reacts with aq. NH3(c) aq. FeCl3 reacts with aq. K4[Fe(CN)]6(d) KMnO4 reduced to MnO2 in alkalinemedium

88 Which of the following will undergo Cannizaro's reaction? A. CCl3CHO B. (CH3)3CCHO C. CH3CH2CHO D. Both A & B

Molarity of H2SO4 is 18 M. Its density is 1.8 g/cm3 hence molality is

37. how hybridization pf phosphorous atom comes sp3 in p4 molecule while it makes bond only by p orbitals? SAME THING FOR PH3 MOLECULE TOO?

Not considering the electron spin, the degeneracy of the second excited state n=3, of H atom is 9, while the degeneracy of the second excited state of H− is:

Which of the following conversions is known as Stephen’s reduction?

Explain tautomerism in full details

Which set of products are expected on reductive ozonolysis of the following diolefin?

Which of the following compound(s) give(s) the Cannizzaro reaction?

99.How to calculate Z- effective of Helium?

The cryoscopic constant for acetic acid is 3.6 Kkg/mol. A solution of 1 g of a hydrocarbon in 100 g of acetic acid freezes at 16.14 ∘C instead of the usual 16.60 ∘C. The hydrocarbon contains 92.3% carbon. What is its molecular formula?

A liquid is in equilibrium with its vapour at its equilibrium point . On an average the molecules in two phases have equal A_potential energy. B_kinetic energy C_Total energy D_Intermolecular forces

Ascorbic acid (C6H8O6) is a common antioxidant that protects our bodies against radicals. In the redox equation below that occurs in our stomach, which of the following pairs identifies the reducing and oxidizing agents respectively? C6H8O6+2H++2NO−2→C6H6O6+2H2O+2NO

what's definition of work

where did the noble gases lie in Lother Meyer's curve?

Which of the following elements is a member of the hydride gap?

The radius of a calcium ion is 94 pm and of an oxide ion is 146 pm. Predict the crystal structure of calcium oxide.

Question 39Ethene is formed when ethanol at 443k is heated with an excess of concentrated sulphuric acid. What is the role of sulphuric acid in this reaction? Write the balanced chemical equation for this reaction.

In rutile, the coordination number of the anion is ___

The equilibrium constant expression for a gas reaction is, Kc=[NH3]4[O2]5[NO]4[H2O]6 Write the balanced chemical equation corresponding to this expression.

Discuss the shape ofthe following molecules using the VSEPR model:BeCl2,BCl3,SiCl4,AsF5,H2S,PH3

A light source of wavelength λ illuminates a metal and Ejects photo electron with KE=1 kj.Another light source of wavelength λ/3 ​,ejects photo-electrons from same metal with KE​=4kj. Find the value of work function of metal.

The possibility of finding an electron in an orbital was conceived by

Why does 2p_{z }have sigma bonding? Shouldn't it have pi bonding?

Which of the following will be formed when KI is treated with H2O2 in neutral medium ?

A light source of wavelength λ illuminates a metal and Ejects photo electron with KE=1 kj.Another light source of wavelength λ/3 ,ejects photo-electrons from same metal with KE=4kj. Find the value of work function of metal.