15280 + Interview Questions in Chemistry Page 107 InterviewSolution

5301.	Question 7.3 Write the balanced chemical equation for the following reaction: Aluminium + Copper chloride → Aluminium chloride + Copper
Answer» Question 7.3 Write the balanced chemical equation for the following reaction: Aluminium + Copper chloride $\to$ Aluminium chloride + Copper

Discussion

5302.	Do all metalloids form amphoteric oxides ?
Answer» Do all metalloids form amphoteric oxides ?

Discussion

5303.	Compound A is bubbled through bromine dissolved in carbon tetrachloride and the product is CH2Br − CH2Br.A → Br2/CCl4 CH2Br − CH2Br(i) Draw the structural formula of A.(ii) What type of reaction has A undergone?(iii) What is your observation?(iv) Name (not formula) the compound formed when steam reacts with A in the presence of phosphoric acid.(v) What is the procedure for converting the product of (b) (iv) back to A?
Answer» Compound A is bubbled through bromine dissolved in carbon tetrachloride and the product is CH₂Br − CH₂Br. A $\overset{{Br}_{2} / {CCl}_{4}}{\to}$ CH₂Br − CH₂Br (i) Draw the structural formula of A. (ii) What type of reaction has A undergone? (iii) What is your observation? (iv) Name (not formula) the compound formed when steam reacts with A in the presence of phosphoric acid. (v) What is the procedure for converting the product of (b) (iv) back to A?

Discussion

5304.	Differentiate between natural and artificial radioactive elements.
Answer» Differentiate between natural and artificial radioactive elements.

Discussion

5305.	which of the following is most basic in a solution of carbon tetrachloridea)nh3b)ch3ch2nh2c)(ch3ch2)2nhd)(ch3ch2)3n
Answer» which of the following is most basic in a solution of carbon tetrachloride a)nh3 b)ch3ch2nh2 c)(ch3ch2)2nh d)(ch3ch2)3n

Discussion

5306.	H2COH.CH2OH on heating with periodic acid gives
Answer» H2COH.CH2OH on heating with periodic acid gives

Discussion

5307.	why the electron gain enthalpy in noble gases is minimum
Answer» why the electron gain enthalpy in noble gases is minimum

Discussion

5308.	Ques. A 0.05 L sample of 0.2M hydrochloric acid id added to 0.05L of 0.2M aqueous ammonia in a calorimeter . heat capacity of entire calorimeter system is 480J/K. the temp increase is 1.09K . calculate △_rH^° in kJ/mol for the following reaction HCl (aq.)+NH_3(aq.)→ NH_4Cl(aq.) \lbrack a\rbrack-52.32 \lbrack b\rbrack-61.1 \lbrack c\rbrack-55.8 \lbrack d\rbrack-58.2
Answer» Ques. A 0.05 L sample of 0.2M hydrochloric acid id added to 0.05L of 0.2M aqueous ammonia in a calorimeter . heat capacity of entire calorimeter system is 480J/K. the temp increase is 1.09K . calculate △_rH^° in kJ/mol for the following reaction HCl (aq.)+NH_3(aq.)→ NH_4Cl(aq.) \lbrack a\rbrack-52.32 \lbrack b\rbrack-61.1 \lbrack c\rbrack-55.8 \lbrack d\rbrack-58.2

Discussion

5309.	What is the correct increasing order of atomic radii of the following Na+, Ne, F-
Answer» What is the correct increasing order of atomic radii of the following Na+, Ne, F-

Discussion

5310.	Identify the pair of elements from among the following which have the same number of valence electrons.
Answer» Identify the pair of elements from among the following which have the same number of valence electrons.

Discussion

5311.	Select the organic compound(s) with correct molecular formula.
Answer» Select the organic compound(s) with correct molecular formula.

Discussion

5312.	How to calculate equivalent weight in a reaction of oxidizing agents
Answer» How to calculate equivalent weight in a reaction of oxidizing agents

Discussion

5313.	Identify the compound which on reacting with sulphuric acid produces a gas that turns lime water milky.
Answer» Identify the compound which on reacting with sulphuric acid produces a gas that turns lime water milky.

Discussion

5314.	Select the series which is correctly arranged in increasing order of their pH value.
Answer» Select the series which is correctly arranged in increasing order of their pH value.

Discussion

5315.	For same frequency and different intensity, why does saturation current changes bt same potential is maintained in photoelectric effect experiment??
Answer» For same frequency and different intensity, why does saturation current changes bt same potential is maintained in photoelectric effect experiment??

Discussion

5316.	Question 12 (b) Give reason why sodium, potassium and lithium are stored in oil?
Answer» Question 12 (b) Give reason why sodium, potassium and lithium are stored in oil?

Discussion

5317.	What is the yellow coloured amphoteric oxide that reacts with caustic soda to give a colourless salt of sodium plumbate and water?
Answer» What is the yellow coloured amphoteric oxide that reacts with caustic soda to give a colourless salt of sodium plumbate and water?

Discussion

5318.	Which of the following properties make metals the best choice to be used in electroplating?
Answer» Which of the following properties make metals the best choice to be used in electroplating?

Discussion

5319.	The balanced chemical question of haber process is?
Answer» The balanced chemical question of haber process is?

Discussion

5320.	Arrange 4d,5p,5f and 6p orbitals in decreasing order of their energies:
Answer» Arrange $4 d, 5 p, 5 f$ and $6 p$ orbitals in decreasing order of their energies:

Discussion

5321.	number of rows and periods in mendel eevs periodic table
Answer» number of rows and periods in mendel eevs periodic table

Discussion

5322.	what are those species of atoms called whose no. of protons are same?
Answer» what are those species of atoms called whose no. of protons are same?

Discussion

5323.	Amongst the following, the total number of compounds soluble in aqueous NaOH is ___
Answer» Amongst the following, the total number of compounds soluble in aqueous NaOH is ___

Discussion

5324.	What is the difference and the similarity between metal displacement reaction and electroplating of metals?
Answer» What is the difference and the similarity between metal displacement reaction and electroplating of metals?

Discussion

5325.	By considering their position in the Periodic Table, which one of the following elements would you expect to have maximum metallic characteristic?Elements are : Ga Ge As Se Be
Answer» By considering their position in the Periodic Table, which one of the following elements would you expect to have maximum metallic characteristic? Elements are : Ga Ge As Se Be

Discussion

5326.	The percentage composition of sodium phosphate, as determined by analysis is: 42.1% of sodium, 18.9% of phosphorus and 39% of oxygen. Find the empirical formula of the compound (work to two decimal places). [H = 1, N = 14, O = 16, Na = 23, P = 31, Cl = 35.5, Pt = 195]
Answer» The percentage composition of sodium phosphate, as determined by analysis is: 42.1% of sodium, 18.9% of phosphorus and 39% of oxygen. Find the empirical formula of the compound (work to two decimal places). [H = 1, N = 14, O = 16, Na = 23, P = 31, Cl = 35.5, Pt = 195]

Discussion

5327.	Methane is a major constituent of
Answer» Methane is a major constituent of

Discussion

5328.	The number of orbitals with n=5, ml=+2 is . (Round off to the nearest integer).
Answer» The number of orbitals with $n = 5, m_{l} = + 2$ is . (Round off to the nearest integer).

Discussion

5329.	What happens in aquaregia (having specific ratio of HCl and sulphuric acid )it dissolves less reactive metals?If it is due to Cl formation than why doesn't it occurs during excessive use of HCl?
Answer» What happens in aquaregia (having specific ratio of HCl and sulphuric acid )it dissolves less reactive metals?If it is due to Cl formation than why doesn't it occurs during excessive use of HCl?

Discussion

5330.	Write a brief note on the atomic structure of carbon.
Answer» Write a brief note on the atomic structure of carbon.

Discussion

5331.	the oxidation number of phosphorus vary from
Answer» the oxidation number of phosphorus vary from

Discussion

5332.	Give the name and structural formula of next homologue of HCOOH.
Answer» Give the name and structural formula of next homologue of HCOOH.

Discussion

5333.	Why Electric Field Entensity is spherically symmetrical ?
Answer» Why Electric Field Entensity is spherically symmetrical ?

Discussion

5334.	Three solutions of HCI having normality 12 N, 6N and 2N are mixed to obtain a solution of normality 4N .Which among the following volume ratio is incorrect for the above three components-(1) 1:1:5 (2) 2 : 1 : 9 (3) 1:2:6 (4 1: 2:4
Answer» Three solutions of HCI having normality 12 N, 6N and 2N are mixed to obtain a solution of normality 4N .Which among the following volume ratio is incorrect for the above three components-(1) 1:1:5 (2) 2 : 1 : 9 (3) 1:2:6 (4 1: 2:4

Discussion

5335.	An oxide of an element contains 20% by mass oxygen, the equivalent weight of element in the compound will be
Answer» An oxide of an element contains 20% by mass oxygen, the equivalent weight of element in the compound will be

Discussion

5336.	State any two uses of each of the following metals. a) Ironb) Copperc) Aluminium
Answer» State any two uses of each of the following metals. a) Iron b) Copper c) Aluminium

Discussion

5337.	What is the number of moles of Fe(OH3) that can be produced by allowing 1 mole FeS3, 2 moles H2O and 3 moles of O2 to react?
Answer» What is the number of moles of Fe(OH3) that can be produced by allowing 1 mole FeS3, 2 moles H2O and 3 moles of O2 to react?

Discussion

5338.	A student treats pure graphite rode with concentrated sulphuric acid. This results in the formation of a colourless and odourless gas. Identify the gas and the property of sulphuric acid which is responsible for the formation of this gas?
Answer» A student treats pure graphite rode with concentrated sulphuric acid. This results in the formation of a colourless and odourless gas. Identify the gas and the property of sulphuric acid which is responsible for the formation of this gas?

Discussion

5339.

(a) Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain:(i) Sodium sulphate(ii) Copper sulphate(iii) Iron (II) sulphate(iv) Zinc carbonate Dilute sulphuric acid Copper Iron Sodium, Zinc Copper carbonate Sodium carbonate (b) From the formulae listed below, choose one, in each case, corresponding to the salt having the given description:AgCl, CuCO3, CuSO4·5H2O, KNO3, NaCl, NaHSO4, Pb(NO3)2, ZnCO3, ZnSO4·7H2O.(i) An acid salt.(ii) An insoluble chloride.(iii) On treating with concentrated sulphuric acid, this salt changes from blue to white.(iv) On heating this salt changes from green to black.(v) This salt gives nitrogen dioxide on heating.

Answer» (a) Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain:

(i) Sodium sulphate

(ii) Copper sulphate

(iii) Iron (II) sulphate

(iv) Zinc carbonate

Dilute sulphuric acid

Copper

Iron

Sodium, Zinc

Copper carbonate

Sodium carbonate

(b) From the formulae listed below, choose one, in each case, corresponding to the salt having the given description:

AgCl, CuCO₃, CuSO₄·5H₂O, KNO₃, NaCl, NaHSO₄, Pb(NO₃)₂, ZnCO₃, ZnSO₄·7H₂O.

(i) An acid salt.

(ii) An insoluble chloride.

(iii) On treating with concentrated sulphuric acid, this salt changes from blue to white.

(iv) On heating this salt changes from green to black.

(v) This salt gives nitrogen dioxide on heating.

Discussion

5340.	A liquid fuel. C7H16 is burnt with 10% deficit air than the stoichiometric air requirement. Assuming no hydrocarbons in the product, the volume % of N2 in the product is 71.3
Answer» A liquid fuel. $C_{7} H_{16}$ is burnt with 10% deficit air than the stoichiometric air requirement. Assuming no hydrocarbons in the product, the volume % of $N_{2}$ in the product is 71.3

Discussion

5341.	Write the balanced chemical equation for the following: 1} Dilute hydrochloric acid reacts with sodium carbonate.
Answer» Write the balanced chemical equation for the following: 1} Dilute hydrochloric acid reacts with sodium carbonate.

Discussion

5342.	A+2B 2CInitially 2 mole of A and B are taken in 10 lit flaskat equilibrium 1 mole of C is formed then calculateK for given reaction :-(1) 6.66(2) 3.33(3) 2.22(4) 1.11
Answer» A+2B 2CInitially 2 mole of A and B are taken in 10 lit flaskat equilibrium 1 mole of C is formed then calculateK for given reaction :-(1) 6.66(2) 3.33(3) 2.22(4) 1.11

Discussion

5343.	Write the equation for the reaction: Aluminium nitride and water.
Answer» Write the equation for the reaction: Aluminium nitride and water.

Discussion

5344.	24. IF X AND Y are two sets such that X union Y has 18 element ,X has 8 element and Y has 15 element, how many elements does X intersecting Y have?
Answer» 24. IF X AND Y are two sets such that X union Y has 18 element ,X has 8 element and Y has 15 element, how many elements does X intersecting Y have?

Discussion

5345.	Question 33.What will be the action of the following substances on litmus paper ? Dry HCl gas, moistened NH3 gas, lemon juice, carbonated soft drink, curd, soap solution.
Answer» Question 33. What will be the action of the following substances on litmus paper ? Dry HCl gas, moistened ${NH}_{3}$ gas, lemon juice, carbonated soft drink, curd, soap solution.

Discussion

5346.	11.Why with higher energy atoms or molecules are in unstable state and want to go back to lower energy state
Answer» 11.Why with higher energy atoms or molecules are in unstable state and want to go back to lower energy state

Discussion

5347.	Give names of two natural polymers and write the place of their occurrance.
Answer» Give names of two natural polymers and write the place of their occurrance.

Discussion

5348.	what are the steps to draw isomers of a carbon compound.
Answer» what are the steps to draw isomers of a carbon compound.

Discussion

5349.	(i) Calculate the volume of 320 g of SO2 at stp (Atomic mass: S = 32 and O = 16)(ii) State Gay-Lussac's Law of combining volumes.(iii) Calculate the volume of oxygen required for the complete combustion of 8.8 g of propane (C3H8). (Atomic mass: C = 14, O = 16, H = 1, Molar Volume = 22.4 dm3 at stp)
Answer» (i) Calculate the volume of 320 g of SO₂ at stp (Atomic mass: S = 32 and O = 16) (ii) State Gay-Lussac's Law of combining volumes. (iii) Calculate the volume of oxygen required for the complete combustion of 8.8 g of propane (C₃H₈). (Atomic mass: C = 14, O = 16, H = 1, Molar Volume = 22.4 dm³ at stp)

Discussion

5350.	name the gas evolved when potassium nitrate Crystals are heated with sulphuric acid
Answer» name the gas evolved when potassium nitrate Crystals are heated with sulphuric acid

Discussion

Explore topic-wise InterviewSolutions in .

Question 7.3 Write the balanced chemical equation for the following reaction: Aluminium + Copper chloride → Aluminium chloride + Copper

Do all metalloids form amphoteric oxides ?

Differentiate between natural and artificial radioactive elements.

which of the following is most basic in a solution of carbon tetrachloridea)nh3b)ch3ch2nh2c)(ch3ch2)2nhd)(ch3ch2)3n

H2COH.CH2OH on heating with periodic acid gives

why the electron gain enthalpy in noble gases is minimum

What is the correct increasing order of atomic radii of the following Na+, Ne, F-

Identify the pair of elements from among the following which have the same number of valence electrons.

Select the organic compound(s) with correct molecular formula.

How to calculate equivalent weight in a reaction of oxidizing agents

Identify the compound which on reacting with sulphuric acid produces a gas that turns lime water milky.

Select the series which is correctly arranged in increasing order of their pH value.

For same frequency and different intensity, why does saturation current changes bt same potential is maintained in photoelectric effect experiment??

Question 12 (b) Give reason why sodium, potassium and lithium are stored in oil?

What is the yellow coloured amphoteric oxide that reacts with caustic soda to give a colourless salt of sodium plumbate and water?

Which of the following properties make metals the best choice to be used in electroplating?

The balanced chemical question of haber process is?

Arrange 4d,5p,5f and 6p orbitals in decreasing order of their energies:

number of rows and periods in mendel eevs periodic table

what are those species of atoms called whose no. of protons are same?

Amongst the following, the total number of compounds soluble in aqueous NaOH is ___

What is the difference and the similarity between metal displacement reaction and electroplating of metals?

By considering their position in the Periodic Table, which one of the following elements would you expect to have maximum metallic characteristic?Elements are : Ga Ge As Se Be

The percentage composition of sodium phosphate, as determined by analysis is: 42.1% of sodium, 18.9% of phosphorus and 39% of oxygen. Find the empirical formula of the compound (work to two decimal places). [H = 1, N = 14, O = 16, Na = 23, P = 31, Cl = 35.5, Pt = 195]

Methane is a major constituent of

The number of orbitals with n=5, ml=+2 is . (Round off to the nearest integer).

What happens in aquaregia (having specific ratio of HCl and sulphuric acid )it dissolves less reactive metals?If it is due to Cl formation than why doesn't it occurs during excessive use of HCl?

Write a brief note on the atomic structure of carbon.

the oxidation number of phosphorus vary from

Give the name and structural formula of next homologue of HCOOH.

Why Electric Field Entensity is spherically symmetrical ?

Three solutions of HCI having normality 12 N, 6N and 2N are mixed to obtain a solution of normality 4N .Which among the following volume ratio is incorrect for the above three components-(1) 1:1:5 (2) 2 : 1 : 9 (3) 1:2:6 (4 1: 2:4

An oxide of an element contains 20% by mass oxygen, the equivalent weight of element in the compound will be

State any two uses of each of the following metals. a) Ironb) Copperc) Aluminium

What is the number of moles of Fe(OH3) that can be produced by allowing 1 mole FeS3, 2 moles H2O and 3 moles of O2 to react?

A student treats pure graphite rode with concentrated sulphuric acid. This results in the formation of a colourless and odourless gas. Identify the gas and the property of sulphuric acid which is responsible for the formation of this gas?

A liquid fuel. C7H16 is burnt with 10% deficit air than the stoichiometric air requirement. Assuming no hydrocarbons in the product, the volume % of N2 in the product is 71.3

Write the balanced chemical equation for the following: 1} Dilute hydrochloric acid reacts with sodium carbonate.

A+2B 2CInitially 2 mole of A and B are taken in 10 lit flaskat equilibrium 1 mole of C is formed then calculateK for given reaction :-(1) 6.66(2) 3.33(3) 2.22(4) 1.11

Write the equation for the reaction: Aluminium nitride and water.

24. IF X AND Y are two sets such that X union Y has 18 element ,X has 8 element and Y has 15 element, how many elements does X intersecting Y have?

Question 33.What will be the action of the following substances on litmus paper ? Dry HCl gas, moistened NH3 gas, lemon juice, carbonated soft drink, curd, soap solution.

11.Why with higher energy atoms or molecules are in unstable state and want to go back to lower energy state

Give names of two natural polymers and write the place of their occurrance.

what are the steps to draw isomers of a carbon compound.

(i) Calculate the volume of 320 g of SO2 at stp (Atomic mass: S = 32 and O = 16)(ii) State Gay-Lussac's Law of combining volumes.(iii) Calculate the volume of oxygen required for the complete combustion of 8.8 g of propane (C3H8). (Atomic mass: C = 14, O = 16, H = 1, Molar Volume = 22.4 dm3 at stp)

name the gas evolved when potassium nitrate Crystals are heated with sulphuric acid