46295 + Interview Questions in Chemistry Page 39 InterviewSolution

1901.	Among the following molecular orbitals , how many have at least one nodal plane ? sigma* 1s, sigma 2s, sigma2pz, 2px , 2py, sigma 2pz
Answer» Among the following molecular orbitals , how many have at least one nodal plane ? sigma* 1s, sigma 2s, sigma2pz, 2px , 2py, sigma 2pz

Discussion

1902.	What is hydrolysis?
Answer» What is hydrolysis?

Discussion

1903.	If solution is colourless is it mean that the compound is fully filled electron
Answer» If solution is colourless is it mean that the compound is fully filled electron

Discussion

1904.	How does nonmetal react with water?
Answer» How does nonmetal react with water?

Discussion

1905.	Identify A and predict the type of reaction:
Answer» Identify A and predict the type of reaction:

Discussion

1906.	What current strength would be required to produce hydrogen gas at the rate of 1.12 cm3s−1(STP) by the electrolysis of aqueous NaCl solution with 96.5% current efficiency ?
Answer» What current strength would be required to produce hydrogen gas at the rate of $1.12 c m^{3} s^{- 1}$ (STP) by the electrolysis of aqueous NaCl solution with 96.5% current efficiency ?

Discussion

1907.	The number of moles in 3.00 g of boron tribromide BBr3 is 'x' ×10−2. 'x' is .
Answer» The number of moles in 3.00 g of boron tribromide $B B r_{3}$ is 'x' $\times 10^{- 2}$ . 'x' is .

Discussion

1908.	Enthalpyof combustion of carbon to CO2is –393.5 kJ mol–1.Calculate the heat released upon formation of 35.2 g of CO2from carbon and dioxygen gas.
Answer» Enthalpy of combustion of carbon to CO₂ is –393.5 kJ mol^–1. Calculate the heat released upon formation of 35.2 g of CO₂ from carbon and dioxygen gas.

Discussion

1909.	Which of the following reactions increases the production of dihydrogen from synthesis gas?
Answer» Which of the following reactions increases the production of dihydrogen from synthesis gas?

Discussion

1910.	The angular momentum of an electron in the hydrogen atom is 3h2π, here h is Planck’s constant. The kinetic energy of this electron is
Answer» The angular momentum of an electron in the hydrogen atom is $\frac{3 h}{2 π}$ , here $h$ is Planck’s constant. The kinetic energy of this electron is

Discussion

1911.	In the given fig. locate the position where the ball lies on the number line.
Answer» In the given fig. locate the position where the ball lies on the number line.

1911.

In the given fig. locate the position where the ball lies on the number line.

Answer»

In the given fig. locate the position where the ball lies on the number line.

Discussion

1912.	Given (i)C(graphite)+O2(g)→CO2(g);△rH∘=xKJmol−1(ii)C(graphite)+12O2(g)→CO(g);△rH∘=yKJmol−1(iii)CO(g)+12O2(g)→CO2(g);△rH∘=zKJmol−1Based on the above thermochemical equations, find out which one of the following algebraic relationships is correct?
Answer» Given $(i) C_{(g r a p h i t e)} + O_{2 (g)} \to C O_{2 (g)}; △_{r} H^{\circ} = x K J m o l^{- 1} (i i) C_{(g r a p h i t e)} + \frac{1}{2} O_{2 (g)} \to C O_{(g)}; △_{r} H^{\circ} = y K J m o l^{- 1} (i i i) C O_{(g)} + \frac{1}{2} O_{2 (g)} \to C O_{2 (g)}; △_{r} H^{\circ} = z K J m o l^{- 1}$ Based on the above thermochemical equations, find out which one of the following algebraic relationships is correct?

Discussion

1913.	Gaseous reaction A → B + C follows first order kinetics. Concentration of A changes from 1 M to 0.25 M in 138.6 minutes. Find the rate of reaction when concentration of A is 0.1 M.
Answer» Gaseous reaction A $\to$ B + C follows first order kinetics. Concentration of A changes from 1 M to 0.25 M in 138.6 minutes. Find the rate of reaction when concentration of A is 0.1 M.

Discussion

1914.	If molar mass of compound B is x, then find x2
Answer» If molar mass of compound B is $x$ , then find $\frac{x}{2}$

Discussion

1915.	(i) Write the electronic configurations of the following ions: (a) H– (b) Na+ (c) O2–(d) F– (ii) What are the atomic numbers of elements whose outermost electrons are represented by (a) 3s1 (b) 2p3 and (c) 3p5? (iii) Which atoms are indicated by the following configurations? (a) [He] 2s1 (b) [Ne] 3s2 3p3 (c) [Ar] 4s2 3d1.
Answer» (i) Write the electronic configurations of the following ions: (a) H^–(b) Na⁺ (c) O^2–(d) F^– (ii) What are the atomic numbers of elements whose outermost electrons are represented by (a) 3s¹(b) 2p³ and (c) 3p⁵? (iii) Which atoms are indicated by the following configurations? (a) [He] 2s¹ (b) [Ne] 3s² 3p³ (c) [Ar] 4s² 3d¹.

1915.

(i) Write the electronic configurations of the following ions: (a) H– (b) Na+ (c) O2–(d) F– (ii) What are the atomic numbers of elements whose outermost electrons are represented by (a) 3s1 (b) 2p3 and (c) 3p5? (iii) Which atoms are indicated by the following configurations? (a) [He] 2s1 (b) [Ne] 3s2 3p3 (c) [Ar] 4s2 3d1.

Answer»

(i) Write the electronic configurations of the following
ions: (a) H^–(b) Na⁺
(c) O^2–(d) F^–

(ii) What are the atomic numbers of elements whose outermost
electrons are represented by (a) 3s¹(b) 2p³
and (c) 3p⁵?

(iii)
Which atoms are indicated by the following configurations?

(a) [He] 2s¹
(b) [Ne] 3s²
3p³ (c)
[Ar] 4s² 3d¹.

Discussion

1916.	All samples of carbon dioxide contain carbon and oxygen in the mass ratio of 3:8.This is in agreement with the law of
Answer» All samples of carbon dioxide contain carbon and oxygen in the mass ratio of 3:8.This is in agreement with the law of

Discussion

1917.	When metal ′M′ is treated with NaOH, a white gelatinous precipitate ′X′ is obtained, which is soluble in excess of NaOH. Compound ′X′ when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal ′M′ is
Answer» When metal $^{'} M^{'}$ is treated with $N a O H$ , a white gelatinous precipitate $^{'} X^{'}$ is obtained, which is soluble in excess of $N a O H$ . Compound $^{'} X^{'}$ when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal $^{'} M^{'}$ is

Discussion

1918.	3. During discharging of lead-storage acid batteryfollowing reaction takes placePb(s) + PbO2 (s) + 2H2SO.2PbSO 4(s) + 2H2O4If 2.5 A of current is drawn for 965 min, H,SO4consumed is(a) 0.75 mol(c) 1.50 mol(b) 3.00 mold) 4.50 mol
Answer» 3. During discharging of lead-storage acid batteryfollowing reaction takes placePb(s) + PbO2 (s) + 2H2SO.2PbSO 4(s) + 2H2O4If 2.5 A of current is drawn for 965 min, H,SO4consumed is(a) 0.75 mol(c) 1.50 mol(b) 3.00 mold) 4.50 mol

Discussion

1919.	What is the lowest energy state of an atom called?
Answer» What is the lowest energy state of an atom called?

Discussion

1920.	In a cubic lattice anion (A) forms hexagonal close packing and cation (C) occupies only 13rd of octahedral voids in it, what will be the general formula of the compound?
Answer» In a cubic lattice anion (A) forms hexagonal close packing and cation (C) occupies only $\frac{1}{3} r d$ of octahedral voids in it, what will be the general formula of the compound?

Discussion

1921.	84 The number of tetrahedral voids per unit cell in sodium chloride crystal is 1) 8 2)4 3) twice the number of octahedral voids 4) four times the number of octahedral voids
Answer» 84 The number of tetrahedral voids per unit cell in sodium chloride crystal is 1) 8 2)4 3) twice the number of octahedral voids 4) four times the number of octahedral voids

Discussion

1922.	H2S,a toxic gas with rotten egg like smell, is used for the qualitativeanalysis. If the solubility of H2Sin water at STP is 0.195 m, calculate Henry’s law constant.
Answer» H₂S, a toxic gas with rotten egg like smell, is used for the qualitative analysis. If the solubility of H₂S in water at STP is 0.195 m, calculate Henry’s law constant.

Discussion

1923.	In a saturated solution of electrolyte, the ionic product of their concentration are constant at constant temperature and this constant for electrolyte is known as
Answer» In a saturated solution of electrolyte, the ionic product of their concentration are constant at constant temperature and this constant for electrolyte is known as

1923.

In a saturated solution of electrolyte, the ionic product of their concentration are constant at constant temperature and this constant for electrolyte is known as

Answer»

In a saturated solution of electrolyte, the ionic product of their concentration are constant at constant temperature and this constant for electrolyte is known as

Discussion

1924.	Aromatic compound containing Benzene Ring are known as:
Answer» Aromatic compound containing Benzene Ring are known as:

Discussion

1925.	Aqueous solutions of HNO3, KOH, CH3COOH and CH3COONa of identical concentrations are provided. The pair(s) of solutions which form a buffer upon mixing is (are)
Answer» Aqueous solutions of $H N O_{3}, K O H, C H_{3} C O O H$ and $C H_{3} C O O N a$ of identical concentrations are provided. The pair(s) of solutions which form a buffer upon mixing is (are)

Discussion

1926.	Total number of stereoisomers are possible in decalin
Answer» Total number of stereoisomers are possible in decalin

Discussion

1927.	If 15 g of a molecule contains 3.011×1021 molecules what will be the molar mass of the molecule?
Answer» If $15 g$ of a molecule contains $3.011 \times 10^{21}$ molecules what will be the molar mass of the molecule?

Discussion

1928.	What is vinyl halide?
Answer» What is vinyl halide?

Discussion

1929.	Match each of the reactions given in Column - I with the corresponding product(s) given in Column - II: Column−IColumn−II(a) Cu+dil.HNO3(p) NO(b) Cu+conc.HNO3(q) NO2(c) Zn+dil.HNO3(r) N2O(d) Zn+conc.HNO3(s) Cu(NO3)2(t) Zn(NO3)2 ___
Answer» Match each of the reactions given in Column - I with the corresponding product(s) given in Column - II: $\begin{matrix} C o l u m n - I & C o l u m n - I I (a) C u + d i l . H N O_{3} & (p) N O (b) C u + c o n c . H N O_{3} & (q) N O_{2} (c) Z n + d i l . H N O_{3} & (r) N_{2} O (d) Z n + c o n c . H N O_{3} & (s) C u (N O_{3})_{2} (t) Z n (N O_{3})_{2} \end{matrix}$ ___

1929.

Match each of the reactions given in Column - I with the corresponding product(s) given in Column - II: Column−IColumn−II(a) Cu+dil.HNO3(p) NO(b) Cu+conc.HNO3(q) NO2(c) Zn+dil.HNO3(r) N2O(d) Zn+conc.HNO3(s) Cu(NO3)2(t) Zn(NO3)2 ___

Answer»

Match each of the reactions given in Column - I with the corresponding product(s) given in Column - II:
$\begin{matrix} C o l u m n - I & C o l u m n - I I (a) C u + d i l . H N O_{3} & (p) N O (b) C u + c o n c . H N O_{3} & (q) N O_{2} (c) Z n + d i l . H N O_{3} & (r) N_{2} O (d) Z n + c o n c . H N O_{3} & (s) C u (N O_{3})_{2} (t) Z n (N O_{3})_{2} \end{matrix}$

___

Discussion

1930.	mention 20 types of amino acids.
Answer» mention 20 types of amino acids .

Discussion

1931.	An electron in the hydrogen atom jumps from excited state n to the ground state . The wavelength so emitted illuminates a photosensitive material having work function 2.75eV.If the stoppinh potential of the photoelectron is 10 eV then the value of n i
Answer» An electron in the hydrogen atom jumps from excited state n to the ground state . The wavelength so emitted illuminates a photosensitive material having work function 2.75eV.If the stoppinh potential of the photoelectron is 10 eV then the value of n i

Discussion

1932.	Which of the following graph(s) will correspond to a SN1 reaction mechanism?
Answer» Which of the following graph(s) will correspond to a $S_{N} 1$ reaction mechanism?

Discussion

1933.	What is the outer electronic configuration of group 13 elements?
Answer» What is the outer electronic configuration of group 13 elements?

Discussion

1934.	What happens when excess CO2 is passed through aqueous solution of sodium carbonate?
Answer» What happens when excess $C O_{2}$ is passed through aqueous solution of sodium carbonate?

Discussion

1935.	Which of the following species does not have eight valence electrons?
Answer» Which of the following species does not have eight valence electrons?

Discussion

1936.	Which, of the following is a hexose sugar?
Answer» Which, of the following is a hexose sugar?

Discussion

1937.	17. Lanthanoid contraction and actinoid contraction
Answer» 17. Lanthanoid contraction and actinoid contraction

Discussion

1938.	54 A 2g sample contain Na2CO3 & NaHCO3 losses 0.248g when heated to 300C at this temp sodium bicarbonate decomposes. What is the % of Na2CO3 in the given mixture
Answer» 54 A 2g sample contain Na2CO3 & NaHCO3 losses 0.248g when heated to 300C at this temp sodium bicarbonate decomposes. What is the % of Na2CO3 in the given mixture

Discussion

1939.	27. Following represent law of multiple proportions 1)N_2O_4,N_2O 2)NaCl,NaBr 3)PCl_3,PH_3 4)CS_2,CO_2
Answer» 27. Following represent law of multiple proportions 1)N_2O_4,N_2O 2)NaCl,NaBr 3)PCl_3,PH_3 4)CS_2,CO_2

Discussion

1940.	[Pt(NH3)4Cl2]Br2 and [Pt(NH3)4Br2]Cl2 is a type of:
Answer» [Pt(NH₃)₄Cl₂]Br₂ and [Pt(NH₃)₄Br₂]Cl₂ is a type of:

Discussion

1941.	In a structure, A atoms have F.C.C. arrangement, B atoms occupy all the tetrahedral sites and C atoms occupy half the octahedral sites. The formula of the compound is
Answer» In a structure, A atoms have F.C.C. arrangement, B atoms occupy all the tetrahedral sites and C atoms occupy half the octahedral sites. The formula of the compound is

Discussion

1942.	Alkene can be prepared from alkyl halide by the following reagent R−X+N¯u→Alkene+NuH
Answer» Alkene can be prepared from alkyl halide by the following reagent $R - X + N ¯ u \to A l k e n e + N u H$

Discussion

1943.	In which pair of species, both species have similar geometry?
Answer» In which pair of species, both species have similar geometry?

Discussion

1944.	Dihydroxy acetone (CH2OH.CO.CH2OH) has the general formula of carbohydrate but not included in this class because:
Answer» Dihydroxy acetone (CH₂OH.CO.CH₂OH) has the general formula of carbohydrate but not included in this class because:

Discussion

1945.	What is the mass of the precipitate formed when 50 ml of 16.9% (w/v) solution of AgNO3 is mixed with 50 ml of 5.8% (w/v) NaCl solution? (Ag=107.8, N=14, O=16, Na=23, Cl=35.5) 1) 7g 2) 14g 3) 28g 4) 3.5g
Answer» What is the mass of the precipitate formed when 50 ml of 16.9% (w/v) solution of AgNO3 is mixed with 50 ml of 5.8% (w/v) NaCl solution? (Ag=107.8, N=14, O=16, Na=23, Cl=35.5) 1) 7g 2) 14g 3) 28g 4) 3.5g

Discussion

1946.	For gaseous state, if the most probable speed is denoted by C∗, average speed by ¯C and root mean square speed by C, then for a large number of molecules, the ratios of these speeds are:
Answer» For gaseous state, if the most probable speed is denoted by $C^{*}$ , average speed by $¯ C$ and root mean square speed by $C$ , then for a large number of molecules, the ratios of these speeds are:

Discussion

1947.	why is Be not an alkaline earth metal sir?
Answer» why is Be not an alkaline earth metal sir?

Discussion

1948.	The activation energy of a reaction can be determined from the slope of which of the following graphs ?
Answer» The activation energy of a reaction can be determined from the slope of which of the following graphs ?

Discussion

1949.	nta sample contain N moles of diatomic gas at temprature T . Molecules of gas get dissociated into atoms , temp remain constant. find change in internal energyn
Answer» nta sample contain N moles of diatomic gas at temprature T . Molecules of gas get dissociated into atoms , temp remain constant. find change in internal energyn

Discussion

1950.	why anode acts as negative electrode in galvanic cell
Answer» why anode acts as negative electrode in galvanic cell

Discussion

Explore topic-wise InterviewSolutions in .

Among the following molecular orbitals , how many have at least one nodal plane ? sigma* 1s, sigma 2s, sigma*2pz, 2px , *2py, sigma 2pz

What is hydrolysis?

If solution is colourless is it mean that the compound is fully filled electron

How does nonmetal react with water?

Identify A and predict the type of reaction:

What current strength would be required to produce hydrogen gas at the rate of 1.12 cm3s−1(STP) by the electrolysis of aqueous NaCl solution with 96.5% current efficiency ?

The number of moles in 3.00 g of boron tribromide BBr3 is 'x' ×10−2. 'x' is .

Enthalpyof combustion of carbon to CO2is –393.5 kJ mol–1.Calculate the heat released upon formation of 35.2 g of CO2from carbon and dioxygen gas.

Which of the following reactions increases the production of dihydrogen from synthesis gas?

The angular momentum of an electron in the hydrogen atom is 3h2π, here h is Planck’s constant. The kinetic energy of this electron is

In the given fig. locate the position where the ball lies on the number line.

Given (i)C(graphite)+O2(g)→CO2(g);△rH∘=xKJmol−1(ii)C(graphite)+12O2(g)→CO(g);△rH∘=yKJmol−1(iii)CO(g)+12O2(g)→CO2(g);△rH∘=zKJmol−1Based on the above thermochemical equations, find out which one of the following algebraic relationships is correct?

Gaseous reaction A → B + C follows first order kinetics. Concentration of A changes from 1 M to 0.25 M in 138.6 minutes. Find the rate of reaction when concentration of A is 0.1 M.

If molar mass of compound B is x, then find x2

All samples of carbon dioxide contain carbon and oxygen in the mass ratio of 3:8.This is in agreement with the law of

When metal ′M′ is treated with NaOH, a white gelatinous precipitate ′X′ is obtained, which is soluble in excess of NaOH. Compound ′X′ when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal ′M′ is

3. During discharging of lead-storage acid batteryfollowing reaction takes placePb(s) + PbO2 (s) + 2H2SO.2PbSO 4(s) + 2H2O4If 2.5 A of current is drawn for 965 min, H,SO4consumed is(a) 0.75 mol(c) 1.50 mol(b) 3.00 mold) 4.50 mol

What is the lowest energy state of an atom called?

In a cubic lattice anion (A) forms hexagonal close packing and cation (C) occupies only 13rd of octahedral voids in it, what will be the general formula of the compound?

84 The number of tetrahedral voids per unit cell in sodium chloride crystal is 1) 8 2)4 3) twice the number of octahedral voids 4) four times the number of octahedral voids

H2S,a toxic gas with rotten egg like smell, is used for the qualitativeanalysis. If the solubility of H2Sin water at STP is 0.195 m, calculate Henry’s law constant.

In a saturated solution of electrolyte, the ionic product of their concentration are constant at constant temperature and this constant for electrolyte is known as

Aromatic compound containing Benzene Ring are known as:

Aqueous solutions of HNO3, KOH, CH3COOH and CH3COONa of identical concentrations are provided. The pair(s) of solutions which form a buffer upon mixing is (are)

Total number of stereoisomers are possible in decalin

If 15 g of a molecule contains 3.011×1021 molecules what will be the molar mass of the molecule?

What is vinyl halide?

Match each of the reactions given in Column - I with the corresponding product(s) given in Column - II: Column−IColumn−II(a) Cu+dil.HNO3(p) NO(b) Cu+conc.HNO3(q) NO2(c) Zn+dil.HNO3(r) N2O(d) Zn+conc.HNO3(s) Cu(NO3)2(t) Zn(NO3)2 ___

mention 20 types of amino acids.

An electron in the hydrogen atom jumps from excited state n to the ground state . The wavelength so emitted illuminates a photosensitive material having work function 2.75eV.If the stoppinh potential of the photoelectron is 10 eV then the value of n i

Which of the following graph(s) will correspond to a SN1 reaction mechanism?

What is the outer electronic configuration of group 13 elements?

What happens when excess CO2 is passed through aqueous solution of sodium carbonate?

Which of the following species does not have eight valence electrons?

Which, of the following is a hexose sugar?

17. Lanthanoid contraction and actinoid contraction

54 A 2g sample contain Na2CO3 & NaHCO3 losses 0.248g when heated to 300C at this temp sodium bicarbonate decomposes. What is the % of Na2CO3 in the given mixture

27. Following represent law of multiple proportions 1)N_2O_4,N_2O 2)NaCl,NaBr 3)PCl_3,PH_3 4)CS_2,CO_2

[Pt(NH3)4Cl2]Br2 and [Pt(NH3)4Br2]Cl2 is a type of:

In a structure, A atoms have F.C.C. arrangement, B atoms occupy all the tetrahedral sites and C atoms occupy half the octahedral sites. The formula of the compound is

Alkene can be prepared from alkyl halide by the following reagent R−X+N¯u→Alkene+NuH

In which pair of species, both species have similar geometry?

Dihydroxy acetone (CH2OH.CO.CH2OH) has the general formula of carbohydrate but not included in this class because:

What is the mass of the precipitate formed when 50 ml of 16.9% (w/v) solution of AgNO3 is mixed with 50 ml of 5.8% (w/v) NaCl solution? (Ag=107.8, N=14, O=16, Na=23, Cl=35.5) 1) 7g 2) 14g 3) 28g 4) 3.5g

For gaseous state, if the most probable speed is denoted by C∗, average speed by ¯C and root mean square speed by C, then for a large number of molecules, the ratios of these speeds are:

why is Be not an alkaline earth metal sir?

The activation energy of a reaction can be determined from the slope of which of the following graphs ?

nta sample contain N moles of diatomic gas at temprature T . Molecules of gas get dissociated into atoms , temp remain constant. find change in internal energyn

why anode acts as negative electrode in galvanic cell

Among the following molecular orbitals , how many have at least one nodal plane ? sigma* 1s, sigma 2s, sigma2pz, 2px , 2py, sigma 2pz