15280 + Interview Questions in Chemistry Page 60 InterviewSolution

2951.	Complétez avec tout, toute, tous, toutes.
Answer» Complétez avec tout, toute, tous, toutes.

Discussion

2952.	Which of the following electronic configurations denote an atom in its ground state?
Answer» Which of the following electronic configurations denote an atom in its ground state?

Discussion

2953.	Which gas is liberated when ethanoic acid reacts with bicarbonates?
Answer» Which gas is liberated when ethanoic acid reacts with bicarbonates?

Discussion

2954.	Name the hydrocarbon formed when ethanol is heated with conc. H2SO4 at 170∘C ? What is this reaction known as?
Answer» Name the hydrocarbon formed when ethanol is heated with conc. $H_{2} S O_{4} a t 170^{\circ} C$ ? What is this reaction known as?

Discussion

2955.	Complete and balance the following equations:(i) C + HNO3 → (ii) SO2 + HNO3 → (iii) Fe + HNO3 (conc.) → (iv) FeSO4 + NO + H2O → (v) Pt + HNO3 + HCl → (vi) HNO3 + FeSO4 + H2SO4 →
Answer» Complete and balance the following equations: (i) C + HNO₃ $\overset{}{\to}$ (ii) SO₂ + HNO₃ $\overset{}{\to}$ (iii) Fe + HNO₃ (conc.) $\overset{}{\to}$ (iv) FeSO₄ + NO + H₂O $\overset{}{\to}$ (v) Pt + HNO₃ + HCl $\overset{}{\to}$ (vi) HNO₃ + FeSO₄ + H₂SO₄ $\overset{}{\to}$

Discussion

2956.	The valency of magnesium is _____.
Answer» The valency of magnesium is _____.

Discussion

2957.	22. For a solution if p0A =840mm Hg under atmospheric conditions and vapour pressure of solution is 1 ATM then find 1. Composition of solution 2. Composition of vapour in equilibrium with solution.
Answer» 22. For a solution if p0A =840mm Hg under atmospheric conditions and vapour pressure of solution is 1 ATM then find 1. Composition of solution 2. Composition of vapour in equilibrium with solution.

Discussion

2958.	Why some metals can be cut with knife? Give examples
Answer» Why some metals can be cut with knife? Give examples

Discussion

2959.	Which statement does not explain the placement of elements in a group together?
Answer» Which statement does not explain the placement of elements in a group together?

Discussion

2960.	A student took four test tubes containing solutions of different colours marked I (colourless) II(Blue), III (Orange) and IV (Pale green) . Which of the tubes contain copper sulphate solution and ferrous sulphate solution?
Answer» A student took four test tubes containing solutions of different colours marked I (colourless) II(Blue), III (Orange) and IV (Pale green) . Which of the tubes contain copper sulphate solution and ferrous sulphate solution?

Discussion

2961.	In ___ process, impurities are removed by the addition of flux as slag.
Answer» In ___ process, impurities are removed by the addition of flux as slag.

Discussion

2962.	How much amount of CuSO4.5H2O is required for liberation of 2.54g of iodine when titrated with KI?
Answer» How much amount of CuSO4.5H2O is required for liberation of 2.54g of iodine when titrated with KI?

Discussion

2963.	How can iron be extracted from haematite ore?
Answer» How can iron be extracted from haematite ore?

Discussion

2964.	Nitric acid occurs in ___.
Answer» Nitric acid occurs in ___.

Discussion

2965.	The hardness of water is due to the presence of:
Answer» The hardness of water is due to the presence of:

Discussion

2966.	How many tetrahedral voids are formed by 1 atom??
Answer» How many tetrahedral voids are formed by 1 atom??

Discussion

2967.	which of the following complex is paramgnetic ,inner orbital complex and coloured ?a)[Ni(NH3)]+2b)[co(H2O)]+2c)[Ti(H2O)]+3d)[Co(NH3)6]+3
Answer» which of the following complex is paramgnetic ,inner orbital complex and coloured ? a)[Ni(NH3)]+2 b)[co(H2O)]+2 c)[Ti(H2O)]+3 d)[Co(NH3)6]+3

Discussion

2968.	why does [Co (h2o) 3cl3](h2o)3 not exist?
Answer» why does [Co (h2o) 3cl3](h2o)3 not exist?

Discussion

2969.	When a gas filled in a closed vessel is heated through 1^° C, it's pressure increased by 0.4%. The initial temperature of the gas is A-250 K B-2500 K C-250^° C D-25^° C
Answer» When a gas filled in a closed vessel is heated through 1^° C, it's pressure increased by 0.4%. The initial temperature of the gas is A-250 K B-2500 K C-250^° C D-25^° C

Discussion

2970.	What elements are considered as salts and why? Are all anions salts?
Answer» What elements are considered as salts and why? Are all anions salts?

Discussion

2971.	What is anodizing of aluminium?
Answer» What is anodizing of aluminium?

Discussion

2972.	Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.
Answer» Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

Discussion

2973.	In chlor-alkali process, and are released at cathode and anode respectively.
Answer» In chlor-alkali process, and are released at cathode and anode respectively.

Discussion

2974.	The relationship between rate constant and half-life period of zero order reaction is given by:
Answer» The relationship between rate constant and half-life period of zero order reaction is given by:

Discussion

2975.	State how and under what conditions you would obtain (a) hydrogen and (b) chlorine from hydrochloric acid without using electrolysis. [4 MARKS]
Answer» State how and under what conditions you would obtain (a) hydrogen and (b) chlorine from hydrochloric acid without using electrolysis. [4 MARKS]

Discussion

2976.	(a) Name the method by which alkali metals can be extracted. (b) What is the colour of the flame of sodium and potassium ?
Answer» (a) Name the method by which alkali metals can be extracted. (b) What is the colour of the flame of sodium and potassium ?

2976.

(a) Name the method by which alkali metals can be extracted. (b) What is the colour of the flame of sodium and potassium ?

Answer»

(a) Name the method by which alkali metals can be extracted.

(b) What is the colour of the flame of sodium and potassium ?

Discussion

2977.	the highest electrical conductivity from the following aqueous 1.0.1 M acetic acid 2.0.1M chloroacetic acid 3.0.1 M fluoroacetic acid 4.0.1 M difluroacetic acid
Answer» the highest electrical conductivity from the following aqueous 1.0.1 M acetic acid 2.0.1M chloroacetic acid 3.0.1 M fluoroacetic acid 4.0.1 M difluroacetic acid

Discussion

2978.	An acid of phosphorus has the following percentage composition phosphorus = 38.27% hydrogen = 2.47% oxygen = 59.26 . Find the empirical formula of the acid and its molecular formula, given that its relative molecular mass is 162.
Answer» An acid of phosphorus has the following percentage composition phosphorus = 38.27% hydrogen = 2.47% oxygen = 59.26 . Find the empirical formula of the acid and its molecular formula, given that its relative molecular mass is 162.

Discussion

2979.	At 518 degree celsius,the rate of decomposition of a sample of gaseous acetaldehyde,initially at a pressure of 363 torr,was 1.00 torr/sec when 5% had reacted and 0.5 torr/sec when 33% had reacted.Find the order of the reaction:-
Answer» At 518 degree celsius,the rate of decomposition of a sample of gaseous acetaldehyde,initially at a pressure of 363 torr,was 1.00 torr/sec when 5% had reacted and 0.5 torr/sec when 33% had reacted.Find the order of the reaction:-

Discussion

2980.	Question 52A compounds C (molecular formula C2H4O2) reacts with Na metal to form a compound R and evolves a gas which burns with a pop sound. Compound C on treatment with an alcohol A in presence of acid forms a sweet smelling compound S (molecular compounds C3H6O2). On addition of NaOH to C, it also gives R and water. S on treatment with NaOH solution gives back R and A. Identify C, R, A, S and write down the reactions involved.
Answer» Question 52 A compounds C (molecular formula $C_{2} H_{4} O_{2}$ ) reacts with $Na$ metal to form a compound R and evolves a gas which burns with a pop sound. Compound C on treatment with an alcohol A in presence of acid forms a sweet smelling compound S (molecular compounds $C_{3} H_{6} O_{2}$ ). On addition of $NaOH$ to C, it also gives R and water. S on treatment with $NaOH$ solution gives back R and A. Identify C, R, A, S and write down the reactions involved.

Discussion

2981.	Which of the given sulphur compounds was obtained by the dry distillation of CuSO4.5H2O?
Answer» Which of the given sulphur compounds was obtained by the dry distillation of CuSO₄.5H₂O?

Discussion

2982.	2, How many pi (n) electrons are there in the following molecule?(a) 4(b) 6(c) 8(d) 10
Answer» 2, How many pi (n) electrons are there in the following molecule?(a) 4(b) 6(c) 8(d) 10

Discussion

2983.	(i) Name the catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide in step C.(ii) In the contact process for the manufacture of sulphuric acid, sulphur trioxide is not converted to sulphuric acid by reacting it with water. Instead a two-step procedure is used. Write the equations for the two step involved in D.(iii) What type of substance will liberate sulphur dioxide from sodium sulphite in step E?(iv) Write the equation for the reaction by which sulphur dioxide is converted to sodium sulphite in step F?
Answer» (i) Name the catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide in step C. (ii) In the contact process for the manufacture of sulphuric acid, sulphur trioxide is not converted to sulphuric acid by reacting it with water. Instead a two-step procedure is used. Write the equations for the two step involved in D. (iii) What type of substance will liberate sulphur dioxide from sodium sulphite in step E? (iv) Write the equation for the reaction by which sulphur dioxide is converted to sodium sulphite in step F?

Discussion

2984.	if mole fraction of a gas in water is 0.001 at stp then henarys law cons†an t of gas is nearly
Answer» if mole fraction of a gas in water is 0.001 at stp then henarys law cons†an t of gas is nearly

Discussion

2985.	Write equation for the reaction between hydrochloric acid with each of the following:(a) bleaching powder(b) lead nitrate solution(c) manganese dioxide(d) oxide of lead
Answer» Write equation for the reaction between hydrochloric acid with each of the following: (a) bleaching powder (b) lead nitrate solution (c) manganese dioxide (d) oxide of lead

Discussion

2986.	A student took a concentrated solution of H2SO4 and left it open in the air. What was his observation regarding the humidity of the surrounding:
Answer» A student took a concentrated solution of $H_{2} S O_{4}$ and left it open in the air. What was his observation regarding the humidity of the surrounding:

Discussion

2987.	Question 3.1 Write a balanced chemical equation with state symbols for the reaction: The solution of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.
Answer» Question 3.1 Write a balanced chemical equation with state symbols for the reaction: The solution of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.

Discussion

2988.	Covalent compounds are soluble in:
Answer» Covalent compounds are soluble in:

Discussion

2989.	Where would you find the element with atomic number 18 in the periodic table?
Answer» Where would you find the element with atomic number 18 in the periodic table?

Discussion

2990.	16 gm of oxygen and 3 gm of hydrogen are mixed and kept at 760 mm pressure and 0 degree centigrade.the total volume occupied by mixture will be nearly??
Answer» 16 gm of oxygen and 3 gm of hydrogen are mixed and kept at 760 mm pressure and 0 degree centigrade.the total volume occupied by mixture will be nearly??

Discussion

2991.	the elements whose atoms have three outer most shells incomplete are called (1)s block elements (2)p block elements (3)f block elements (4)d block element
Answer» the elements whose atoms have three outer most shells incomplete are called (1)s block elements (2)p block elements (3)f block elements (4)d block element

Discussion

2992.	Why naoh does not react with solid sodium carbonate??
Answer» Why naoh does not react with solid sodium carbonate??

Discussion

2993.	a certain acid base indicator is red in acid form and blue in basic form.80% of the indicator is present in its blue form at pH 5 .The pH at which indicator show80% red1)3.42)3.83)2.84)7.2
Answer» a certain acid base indicator is red in acid form and blue in basic form.80% of the indicator is present in its blue form at pH 5 .The pH at which indicator show80% red 1)3.4 2)3.8 3)2.8 4)7.2

Discussion

2994.	difference between anomeric carbon and chiral carbon ?
Answer» difference between anomeric carbon and chiral carbon ?

Discussion

2995.	26 How many miles of lead (II) chloride will be formed from a reaction between 6.5g of PbO and 3.2g of HCl??
Answer» 26 How many miles of lead (II) chloride will be formed from a reaction between 6.5g of PbO and 3.2g of HCl??

Discussion

2996.	Why do fullerenes act as insulators in pure state? Also, what is meant by 'pure state' in the context?
Answer» Why do fullerenes act as insulators in pure state? Also, what is meant by 'pure state' in the context?

Discussion

2997.	When 1 mole of H2(g)is heated with one moleis(g)of I2,(g), it was found that 1.48 moles of HI(g) formed at equilibrium. Its Kc is
Answer» When 1 mole of H2(g)is heated with one moleis(g)of I2,(g), it was found that 1.48 moles of HI(g) formed at equilibrium. Its Kc is

Discussion

2998.	1) what is a salt? Give the names and formula of any two salts. Also name the acids and bases from which these salts may be obtained? 2) what is meant by hydrated and anhydrous salts.give examples. 3) write the names formulae and colours of any two hydrated salts.
Answer» 1) what is a salt? Give the names and formula of any two salts. Also name the acids and bases from which these salts may be obtained? 2) what is meant by hydrated and anhydrous salts.give examples. 3) write the names formulae and colours of any two hydrated salts.

2998.

1) what is a salt? Give the names and formula of any two salts. Also name the acids and bases from which these salts may be obtained? 2) what is meant by hydrated and anhydrous salts.give examples. 3) write the names formulae and colours of any two hydrated salts.

Answer»

1) what is a salt? Give the names and formula of any two salts. Also name the acids and bases from which these salts may be obtained?

2) what is meant by hydrated and anhydrous salts.give examples.

3) write the names formulae and colours of any two hydrated salts.

Discussion

2999.	Na2CO3.H2O when exposed to air looses water of crystallization and gives finally
Answer» $N a_{2} C O_{3} . H_{2} O$ when exposed to air looses water of crystallization and gives finally

Discussion

3000.	What are the products formed when MgO reacts with HCl?
Answer» What are the products formed when $MgO$ reacts with $HCl$ ?

Discussion

Explore topic-wise InterviewSolutions in .

Complétez avec tout, toute, tous, toutes.

Which of the following electronic configurations denote an atom in its ground state?

Which gas is liberated when ethanoic acid reacts with bicarbonates?

Name the hydrocarbon formed when ethanol is heated with conc. H2SO4 at 170∘C ? What is this reaction known as?

Complete and balance the following equations:(i) C + HNO3 → (ii) SO2 + HNO3 → (iii) Fe + HNO3 (conc.) → (iv) FeSO4 + NO + H2O → (v) Pt + HNO3 + HCl → (vi) HNO3 + FeSO4 + H2SO4 →

The valency of magnesium is _____.

22. For a solution if p0A =840mm Hg under atmospheric conditions and vapour pressure of solution is 1 ATM then find 1. Composition of solution 2. Composition of vapour in equilibrium with solution.

Why some metals can be cut with knife? Give examples

Which statement does not explain the placement of elements in a group together?

A student took four test tubes containing solutions of different colours marked I (colourless) II(Blue), III (Orange) and IV (Pale green) . Which of the tubes contain copper sulphate solution and ferrous sulphate solution?

In ___ process, impurities are removed by the addition of flux as slag.

How much amount of CuSO4.5H2O is required for liberation of 2.54g of iodine when titrated with KI?

How can iron be extracted from haematite ore?

Nitric acid occurs in ___.

The hardness of water is due to the presence of:

How many tetrahedral voids are formed by 1 atom??

which of the following complex is paramgnetic ,inner orbital complex and coloured ?a)[Ni(NH3)]+2b)[co(H2O)]+2c)[Ti(H2O)]+3d)[Co(NH3)6]+3

why does [Co (h2o) 3cl3](h2o)3 not exist?

When a gas filled in a closed vessel is heated through 1^° C, it's pressure increased by 0.4%. The initial temperature of the gas is A-250 K B-2500 K C-250^° C D-25^° C

What elements are considered as salts and why? Are all anions salts?

What is anodizing of aluminium?

Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

In chlor-alkali process, and are released at cathode and anode respectively.

The relationship between rate constant and half-life period of zero order reaction is given by:

State how and under what conditions you would obtain (a) hydrogen and (b) chlorine from hydrochloric acid without using electrolysis. [4 MARKS]

(a) Name the method by which alkali metals can be extracted. (b) What is the colour of the flame of sodium and potassium ?

the highest electrical conductivity from the following aqueous 1.0.1 M acetic acid 2.0.1M chloroacetic acid 3.0.1 M fluoroacetic acid 4.0.1 M difluroacetic acid

An acid of phosphorus has the following percentage composition phosphorus = 38.27% hydrogen = 2.47% oxygen = 59.26 . Find the empirical formula of the acid and its molecular formula, given that its relative molecular mass is 162.

At 518 degree celsius,the rate of decomposition of a sample of gaseous acetaldehyde,initially at a pressure of 363 torr,was 1.00 torr/sec when 5% had reacted and 0.5 torr/sec when 33% had reacted.Find the order of the reaction:-

Which of the given sulphur compounds was obtained by the dry distillation of CuSO4.5H2O?

2, How many pi (n) electrons are there in the following molecule?(a) 4(b) 6(c) 8(d) 10

if mole fraction of a gas in water is 0.001 at stp then henarys law cons†an t of gas is nearly

Write equation for the reaction between hydrochloric acid with each of the following:(a) bleaching powder(b) lead nitrate solution(c) manganese dioxide(d) oxide of lead

A student took a concentrated solution of H2SO4 and left it open in the air. What was his observation regarding the humidity of the surrounding:

Question 3.1 Write a balanced chemical equation with state symbols for the reaction: The solution of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.

Covalent compounds are soluble in:

Where would you find the element with atomic number 18 in the periodic table?

16 gm of oxygen and 3 gm of hydrogen are mixed and kept at 760 mm pressure and 0 degree centigrade.the total volume occupied by mixture will be nearly??

the elements whose atoms have three outer most shells incomplete are called (1)s block elements (2)p block elements (3)f block elements (4)d block element

Why naoh does not react with solid sodium carbonate??

a certain acid base indicator is red in acid form and blue in basic form.80% of the indicator is present in its blue form at pH 5 .The pH at which indicator show80% red1)3.42)3.83)2.84)7.2

difference between anomeric carbon and chiral carbon ?

26 How many miles of lead (II) chloride will be formed from a reaction between 6.5g of PbO and 3.2g of HCl??

Why do fullerenes act as insulators in pure state? Also, what is meant by 'pure state' in the context?

When 1 mole of H2(g)is heated with one moleis(g)of I2,(g), it was found that 1.48 moles of HI(g) formed at equilibrium. Its Kc is

1) what is a salt? Give the names and formula of any two salts. Also name the acids and bases from which these salts may be obtained? 2) what is meant by hydrated and anhydrous salts.give examples. 3) write the names formulae and colours of any two hydrated salts.

Na2CO3.H2O when exposed to air looses water of crystallization and gives finally

What are the products formed when MgO reacts with HCl?