15280 + Interview Questions in Chemistry Page 88 InterviewSolution

4351.	HCP crystal in made of A ions and B ions are arranged in 2/3 of octahedral voids. The simplest formula of unit cell 1)A4B6 2)A6B4 3) A2B3 4) A3B
Answer» HCP crystal in made of A ions and B ions are arranged in 2/3 of octahedral voids. The simplest formula of unit cell 1)A4B6 2)A6B4 3) A2B3 4) A3B

Discussion

4352.	Given that the standard potentials (E0) of Cu2+/Cu and Cu+/Cu are 0.34 V and 0.522 V respectively, the E0 of Cu2+/Cu+ is-
Answer» Given that the standard potentials ( $E^{0}$ ) of $C u^{2 +} / C u and C u^{+} / C u$ are $0.34 V$ and $0.522 V$ respectively, the $E^{0}$ of $C u^{2 +} / C u^{+}$ is-

Discussion

4353.	why lithium reacts less vigorously with water?xplain in detail
Answer» why lithium reacts less vigorously with water?xplain in detail

Discussion

4354.	Silver metal does not combine easily with oxygen but silver jewellery transishes after some time. How?
Answer» Silver metal does not combine easily with oxygen but silver jewellery transishes after some time. How?

Discussion

4355.	25.Why the electron gain enthalpy of Neon is more positive than helium as well as other noble gases?
Answer» 25.Why the electron gain enthalpy of Neon is more positive than helium as well as other noble gases?

Discussion

4356.	Process of rusting in iron is ? 1) Oxidation 2)Reduction 3)Corrosion
Answer» Process of rusting in iron is ? 1) Oxidation 2)Reduction 3)Corrosion

4356.

Process of rusting in iron is ? 1) Oxidation 2)Reduction 3)Corrosion

Answer»

Process of rusting in iron is ?

1) Oxidation

2)Reduction

3)Corrosion

Discussion

4357.	Why are decomposition reactions called the opposite of combination reactions? Explain by giving one example (with equation) of each type of reaction.
Answer» Why are decomposition reactions called the opposite of combination reactions? Explain by giving one example (with equation) of each type of reaction.

Discussion

4358.	Question 3Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.
Answer» Question 3 Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.

Discussion

4359.	47. What is the mol of (NH4)2SO4 made for buffer solution of PH=8.26 in 0.01M NH4OH solution Playback(NH4+)=9.26 1)0.05mol 2)0.025mol 3)0.10mol 4)0.005mol
Answer» 47. What is the mol of (NH4)2SO4 made for buffer solution of PH=8.26 in 0.01M NH4OH solution Playback(NH4+)=9.26 1)0.05mol 2)0.025mol 3)0.10mol 4)0.005mol

Discussion

4360.	when excess of silver nitrate is added to 200ml of 0.05 M \{cu(NH3)4\} cl 2 solution then the wt of silver chloride formed is a)2.87 b)3.7
Answer» when excess of silver nitrate is added to 200ml of 0.05 M \{cu(NH3)4\} cl 2 solution then the wt of silver chloride formed is a)2.87 b)3.7

Discussion

4361.	The following questions relate to the extraction of aluminium by electrolysis.(a) Give the equation for the reaction which takes place at the cathode.(b) Explain, why it is necessary to renew the anode periodically.
Answer» The following questions relate to the extraction of aluminium by electrolysis. (a) Give the equation for the reaction which takes place at the cathode. (b) Explain, why it is necessary to renew the anode periodically.

Discussion

4362.	Ag\|AgCl\|Cl−(C2)\|\|Cl−(C1)\|AgCl\|Ag for this cell ΔG is negative if:
Answer» $A g \| A g C l \| C l^{-} (C_{2}) \| \| C l^{-} (C_{1}) \| A g C l \| A g for this cell Δ G$ is negative if:

Discussion

4363.	a silver wire dipped in 0.1 M HCl solution sagurated with the AgCl develops oxidation potential of -0.25V. if {E^0}_{Ag/Ag^+}=-0.799V, then K_{sp} of AgCl in pure water will be
Answer» a silver wire dipped in 0.1 M HCl solution sagurated with the AgCl develops oxidation potential of -0.25V. if {E^0}_{Ag/Ag^+}=-0.799V, then K_{sp} of AgCl in pure water will be

Discussion

4364.	For the reaction N2+3H2→2NH3 if d[NH3]/dt=2×10−4 mol L−1s−1 the value of −d[H2]/dt would be
Answer» For the reaction $N_{2} + 3 H_{2} \to 2 N H_{3} i f d [N H_{3}] / d t = 2 \times 10^{- 4} m o l L^{- 1} s^{- 1} the value of - d [H_{2}] / d t$ would be

Discussion

4365.	why doesn't strain have any unit whlie angle does have though the both are lenght by length ie. L/L?
Answer» why doesn't strain have any unit whlie angle does have though the both are lenght by length ie. L/L?

Discussion

4366.	(i) Dilute nitric acid is generally considered to be a typical acid except for its reaction with metals. In what way is dilute nitric acid different from other acids when it reacts with metals?(ii) Write the equation for the reaction of dilute nitric acid with copper.(iii) Account for the yellow colour that appears in concentrated nitric acid when it is left standing in an ordinary glass bottle.
Answer» (i) Dilute nitric acid is generally considered to be a typical acid except for its reaction with metals. In what way is dilute nitric acid different from other acids when it reacts with metals? (ii) Write the equation for the reaction of dilute nitric acid with copper. (iii) Account for the yellow colour that appears in concentrated nitric acid when it is left standing in an ordinary glass bottle.

Discussion

4367.	10. 28 g of nitrogen combined with 48 g of oxygen and 80 g of oxygen separately to produce two different oxide P and Q. Identify the P and Q
Answer» 10. 28 g of nitrogen combined with 48 g of oxygen and 80 g of oxygen separately to produce two different oxide P and Q. Identify the P and Q

Discussion

4368.	One mole of KMnO4 is used for complete oxidation of FeSO4, FeC2O4 and H2C2O4 in acidic medium respectively and separately. Pick up the correct statement :-(1) 5 mole FeSO4 can be oxidised(2) 5/3 mole FeC2O4 can be oxidised(3) 2.5 mole of H2C2O4 can be oxidised
Answer» One mole of KMnO4 is used for complete oxidation of FeSO4, FeC2O4 and H2C2O4 in acidic medium respectively and separately. Pick up the correct statement :- (1) 5 mole FeSO4 can be oxidised (2) 5/3 mole FeC2O4 can be oxidised (3) 2.5 mole of H2C2O4 can be oxidised

Discussion

4369.	When one or two hydrogen atoms of alkane are replaced by -OH groups we get ___ derivatives of alkanes.
Answer» When one or two hydrogen atoms of alkane are replaced by -OH groups we get ___ derivatives of alkanes.

Discussion

4370.	Nature of the bond in HCl is
Answer» Nature of the bond in HCl is

Discussion

4371.	molecules of oxygen are required for complete combustion of 1 mole of acetylene (C2H2).
Answer» molecules of oxygen are required for complete combustion of 1 mole of acetylene (C2H2).

Discussion

4372.	Question 2 Calculate the formula unit masses of ZnO,Na2O,K2CO3. Given atomic masses of Zn = 65 u, Na = 23 u, K = 39 u, C = 12 u, and O = 16 u.
Answer» Question 2 Calculate the formula unit masses of $Z n O, N a_{2} O, K_{2} C O_{3}$ . Given atomic masses of Zn = 65 u, Na = 23 u, K = 39 u, C = 12 u, and O = 16 u.

Discussion

4373.	47.Which of the following contains both covalent and ionic bonds ? 1)NaCl 2) NH3 3)NaOH 4)CO2 Explain the reason also.
Answer» 47.Which of the following contains both covalent and ionic bonds ? 1)NaCl 2) NH3 3)NaOH 4)CO2 Explain the reason also.

Discussion

4374.	How many of the given substances are soluble in water?Sugar, petrol, salt, vinegar, sand, oilExplain their property.
Answer» How many of the given substances are soluble in water? Sugar, petrol, salt, vinegar, sand, oil Explain their property.

Discussion

4375.	(a) Write balanced equations (i) when butane is burnt in oxygen (ii) preparation of ethylene from ethyl alcohol. (b) (i)Convert ethane to acetic acid (ii)Convert acetylene to ethane (iii)Convert acetic acid to ethyl alcohol (iv)Convert acetic acid to ethyl acetate.
Answer» (a) Write balanced equations (i) when butane is burnt in oxygen (ii) preparation of ethylene from ethyl alcohol. (b) (i)Convert ethane to acetic acid (ii)Convert acetylene to ethane (iii)Convert acetic acid to ethyl alcohol (iv)Convert acetic acid to ethyl acetate.

4375.

(a) Write balanced equations (i) when butane is burnt in oxygen (ii) preparation of ethylene from ethyl alcohol. (b) (i)Convert ethane to acetic acid (ii)Convert acetylene to ethane (iii)Convert acetic acid to ethyl alcohol (iv)Convert acetic acid to ethyl acetate.

Answer»

(a) Write balanced equations

(i) when butane is burnt in oxygen
(ii) preparation of ethylene from ethyl alcohol.

(b)

(i)Convert ethane to acetic acid
(ii)Convert acetylene to ethane
(iii)Convert acetic acid to ethyl alcohol
(iv)Convert acetic acid to ethyl acetate.

Discussion

4376.	In __ reaction exchange of partners takes place.
Answer» In __ reaction exchange of partners takes place.

Discussion

4377.	1,1-Diphenyl -2-butene. Show geometrical isomerism?
Answer» 1,1-Diphenyl -2-butene. Show geometrical isomerism?

Discussion

4378.	The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its: (a) oxide (b) hydride (c) sulphide (d) carbonate
Answer» The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its: (a) oxide (b) hydride (c) sulphide (d) carbonate

Discussion

4379.	4.An organic compound( A )having molecular formula C9H10O forms an organic red precipitate (B) with 2;4 DNP reagent . compound( A )gives yellow precipitate (C) when heated in the presence of iodine and NaOH along With colourless compound (D) .A does not reduce tollen's reagent or Fehling 's solution nor does it decolorizes bromine water . On drastic oxidation of (A )with chromic acid ,a carboxylic acid (E)of molecular Formula C7H6O2 is formed Deduce the structure of the organic compounds (A) to( E )
Answer» 4.An organic compound( A )having molecular formula C9H10O forms an organic red precipitate (B) with 2;4 DNP reagent . compound( A )gives yellow precipitate (C) when heated in the presence of iodine and NaOH along With colourless compound (D) .A does not reduce tollen's reagent or Fehling 's solution nor does it decolorizes bromine water . On drastic oxidation of (A )with chromic acid ,a carboxylic acid (E)of molecular Formula C7H6O2 is formed Deduce the structure of the organic compounds (A) to( E )

Discussion

4380.	List of all the amino acids.
Answer» List of all the amino acids.

Discussion

4381.	A sample of ozone has the same mass aa 1 million molecules of oxygen.How many O3 molecules does the sample contain?
Answer» A sample of ozone has the same mass aa 1 million molecules of oxygen.How many O3 molecules does the sample contain?

Discussion

4382.	75 For a complex (d6-configuration) having =25000 cm-1and P = 15000 cm-1, the crystal field stabilisation energy is (1) 30,000 cm (2) -60,000 cm-1 (3) -30,000 cm- (4) +60,000 cm-1
Answer» 75 For a complex (d6-configuration) having =25000 cm-1and P = 15000 cm-1, the crystal field stabilisation energy is (1) 30,000 cm (2) -60,000 cm-1 (3) -30,000 cm- (4) +60,000 cm-1

Discussion

4383.	In a diatomic molecule the bond distance is 1 x 10^{-8} cm. Its dipole moment is 1.2 D. What is the fractional electronic charge on each atom?(a) 0.50(c) 0.25(b)1.2×10^{-10}(d)1.
Answer» In a diatomic molecule the bond distance is 1 x 10^{-8} cm. Its dipole moment is 1.2 D. What is the fractional electronic charge on each atom?(a) 0.50(c) 0.25(b)1.2×10^{-10}(d)1.

Discussion

4384.	57. How many acyclic isomers of formula C5H8 have sp hybridised carbon atoms
Answer» 57. How many acyclic isomers of formula C5H8 have sp hybridised carbon atoms

Discussion

4385.	What do you observe when (a) Lead nitrate is heated. (b) Chlorine water is exposed to sunlight. (c) Hydrogen peroxide is exposed to sunlight. (d) H2S gas is passed through copper sulphate solution. (e) Barium chloride is added to sodium sulphate solution.
Answer» What do you observe when (a) Lead nitrate is heated. (b) Chlorine water is exposed to sunlight. (c) Hydrogen peroxide is exposed to sunlight. (d) $H_{2} S$ gas is passed through copper sulphate solution. (e) Barium chloride is added to sodium sulphate solution.

4385.

What do you observe when (a) Lead nitrate is heated. (b) Chlorine water is exposed to sunlight. (c) Hydrogen peroxide is exposed to sunlight. (d) H2S gas is passed through copper sulphate solution. (e) Barium chloride is added to sodium sulphate solution.

Answer»

What do you observe when

(a) Lead nitrate is heated.

(b) Chlorine water is exposed to sunlight.

(c) Hydrogen peroxide is exposed to sunlight.

(d) $H_{2} S$ gas is passed through copper sulphate solution.

(e) Barium chloride is added to sodium sulphate solution.

Discussion

4386.	What volume fo oxygen would be required to burn completely 400 ml. of acetylene [C2H2] Also, calculated the volume fo carbon dioxide formed. 2C2H2+502→4CO2+2H2O(l)
Answer» What volume fo oxygen would be required to burn completely 400 ml. of acetylene $[C_{2} H_{2}]$ Also, calculated the volume fo carbon dioxide formed. $2 C_{2} H_{2} + 50_{2} \to 4 C O_{2} + 2 H_{2} O (l)$

Discussion

4387.	Himanshu maintains his books on single entry system. His position was as under on 1st January 2012 Cash in hand Rs 600; Cash at Bank Rs 11,000; Stock Rs 11,200; Debtors Rs 6,914; Furniture Rs 400; Sundry Creditors Rs 8,114. The position of Himanshu on 31st December 2012 was as follows: Cash in hand Rs 760; Cash at Bank Rs 4,800; Stock Rs 9,360; Debtors Rs 9,240; Furniture Rs 500; Creditors Rs 6,000. He withdrew Rs 13,000 from the business on 2nd January 2012 out of which he spent Rs 11,200 for purchasing of a motor-car for business. Taking the above into consideration, find out the profit of Himanshu.
Answer» Himanshu maintains his books on single entry system. His position was as under on 1st January 2012 Cash in hand Rs 600; Cash at Bank Rs 11,000; Stock Rs 11,200; Debtors Rs 6,914; Furniture Rs 400; Sundry Creditors Rs 8,114. The position of Himanshu on 31st December 2012 was as follows: Cash in hand Rs 760; Cash at Bank Rs 4,800; Stock Rs 9,360; Debtors Rs 9,240; Furniture Rs 500; Creditors Rs 6,000. He withdrew Rs 13,000 from the business on 2nd January 2012 out of which he spent Rs 11,200 for purchasing of a motor-car for business. Taking the above into consideration, find out the profit of Himanshu.

4387.

Himanshu maintains his books on single entry system. His position was as under on 1st January 2012 Cash in hand Rs 600; Cash at Bank Rs 11,000; Stock Rs 11,200; Debtors Rs 6,914; Furniture Rs 400; Sundry Creditors Rs 8,114. The position of Himanshu on 31st December 2012 was as follows: Cash in hand Rs 760; Cash at Bank Rs 4,800; Stock Rs 9,360; Debtors Rs 9,240; Furniture Rs 500; Creditors Rs 6,000. He withdrew Rs 13,000 from the business on 2nd January 2012 out of which he spent Rs 11,200 for purchasing of a motor-car for business. Taking the above into consideration, find out the profit of Himanshu.

Answer»

Himanshu maintains his books on single entry system. His position was as under on 1st January 2012

Cash in hand Rs 600; Cash at Bank Rs 11,000; Stock Rs 11,200; Debtors Rs 6,914; Furniture Rs 400; Sundry Creditors Rs 8,114.

The position of Himanshu on 31st December 2012 was as follows:

Cash in hand Rs 760; Cash at Bank Rs 4,800; Stock Rs 9,360; Debtors Rs 9,240; Furniture Rs 500; Creditors Rs 6,000.

He withdrew Rs 13,000 from the business on 2nd January 2012 out of which he spent Rs 11,200 for purchasing of a motor-car for business. Taking the above into consideration, find out the profit of Himanshu.

Discussion

4388.	Mr. Samwell Tarly has to learn Chemistry to become a Maester. He is stuck with Kinetics. Will you help him? (Maester is just Master in their language) Choose the appropriate definition of rate constant.
Answer» Mr. Samwell Tarly has to learn Chemistry to become a Maester. He is stuck with Kinetics. Will you help him? (Maester is just Master in their language) Choose the appropriate definition of rate constant.

4388.

Mr. Samwell Tarly has to learn Chemistry to become a Maester. He is stuck with Kinetics. Will you help him? (Maester is just Master in their language) Choose the appropriate definition of rate constant.

Answer»

Mr. Samwell Tarly has to learn Chemistry to become a Maester. He is stuck with Kinetics. Will you help him?

(Maester is just Master in their language)

Choose the appropriate definition of rate constant.

Discussion

4389.	Question 40.Fill in the missing data in the given table.
Answer» Question 40. Fill in the missing data in the given table.

Discussion

4390.	How coal was formed or found.?
Answer» How coal was formed or found.?

Discussion

4391.	(a) Name two metals which are found in nature mainly in the free state (as metallic elements). (b) Name two metals which are always found in the combined state. (c) What iron compound is present in haematite ore? Also, write its chemical formula.
Answer» (a) Name two metals which are found in nature mainly in the free state (as metallic elements). (b) Name two metals which are always found in the combined state. (c) What iron compound is present in haematite ore? Also, write its chemical formula.

Discussion

4392.	Write the structural formulae and IUPAC name of second and third homologues.
Answer» Write the structural formulae and IUPAC name of second and third homologues.

Discussion

4393.	What is self energy of solid non conducting sphere ?
Answer» What is self energy of solid non conducting sphere ?

Discussion

4394.	How many electrons are present in the outermost shell of a carbon atom?4
Answer» How many electrons are present in the outermost shell of a carbon atom? 4

Discussion

4395.	Which metal salt gives a green coloured bead in the sodium carbonate bead test?
Answer» Which metal salt gives a green coloured bead in the sodium carbonate bead test?

Discussion

4396.	According to modern periodic table, the properties of elements are a periodic function of their:
Answer» According to modern periodic table, the properties of elements are a periodic function of their:

Discussion

4397.	If the molar ratio of two gases X2 and Y2 in the gaseous mixture is 2 : 5, then the ratio of number of atoms of X and Y in the same mixture will be
Answer» If the molar ratio of two gases X2 and Y2 in the gaseous mixture is 2 : 5, then the ratio of number of atoms of X and Y in the same mixture will be

Discussion

4398.	If pH of a solution is 5 then it indicates that concentration of [OH−] ions are
Answer» If pH of a solution is 5 then it indicates that concentration of $[O H^{-}]$ ions are

Discussion

4399.	The oxygen family, also called the chalcogens, consists of the elements found in Group 16 of the periodic table and is considered among the main group elements.Which of the following has lowest boiling point ?[1 Mark]
Answer» The oxygen family, also called the chalcogens, consists of the elements found in Group 16 of the periodic table and is considered among the main group elements. Which of the following has lowest boiling point ? [1 Mark]

Discussion

4400.	calculate h and ph of solution obtained by dissolving 0.1 mole of CH3COONa in water to get 100 l solution. ka of CH3COOH= 2 x 10^-5
Answer» calculate h and ph of solution obtained by dissolving 0.1 mole of CH3COONa in water to get 100 l solution. ka of CH3COOH= 2 x 10^-5

Discussion

Explore topic-wise InterviewSolutions in .

HCP crystal in made of A ions and B ions are arranged in 2/3 of octahedral voids. The simplest formula of unit cell 1)A4B6 2)A6B4 3) A2B3 4) A3B

Given that the standard potentials (E0) of Cu2+/Cu and Cu+/Cu are 0.34 V and 0.522 V respectively, the E0 of Cu2+/Cu+ is-

why lithium reacts less vigorously with water?xplain in detail

Silver metal does not combine easily with oxygen but silver jewellery transishes after some time. How?

25.Why the electron gain enthalpy of Neon is more positive than helium as well as other noble gases?

Process of rusting in iron is ? 1) Oxidation 2)Reduction 3)Corrosion

Why are decomposition reactions called the opposite of combination reactions? Explain by giving one example (with equation) of each type of reaction.

Question 3Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.

47. What is the mol of (NH4)2SO4 made for buffer solution of PH=8.26 in 0.01M NH4OH solution Playback(NH4+)=9.26 1)0.05mol 2)0.025mol 3)0.10mol 4)0.005mol

when excess of silver nitrate is added to 200ml of 0.05 M \{cu(NH3)4\} cl 2 solution then the wt of silver chloride formed is a)2.87 b)3.7

The following questions relate to the extraction of aluminium by electrolysis.(a) Give the equation for the reaction which takes place at the cathode.(b) Explain, why it is necessary to renew the anode periodically.

Ag|AgCl|Cl−(C2)||Cl−(C1)|AgCl|Ag for this cell ΔG is negative if:

a silver wire dipped in 0.1 M HCl solution sagurated with the AgCl develops oxidation potential of -0.25V. if {E^0}_{Ag/Ag^+}=-0.799V, then K_{sp} of AgCl in pure water will be

For the reaction N2+3H2→2NH3 if d[NH3]/dt=2×10−4 mol L−1s−1 the value of −d[H2]/dt would be

why doesn't strain have any unit whlie angle does have though the both are lenght by length ie. L/L?

10. 28 g of nitrogen combined with 48 g of oxygen and 80 g of oxygen separately to produce two different oxide P and Q. Identify the P and Q

One mole of KMnO4 is used for complete oxidation of FeSO4, FeC2O4 and H2C2O4 in acidic medium respectively and separately. Pick up the correct statement :-(1) 5 mole FeSO4 can be oxidised(2) 5/3 mole FeC2O4 can be oxidised(3) 2.5 mole of H2C2O4 can be oxidised

When one or two hydrogen atoms of alkane are replaced by -OH groups we get ___ derivatives of alkanes.

Nature of the bond in HCl is

molecules of oxygen are required for complete combustion of 1 mole of acetylene (C2H2).

Question 2 Calculate the formula unit masses of ZnO,Na2O,K2CO3. Given atomic masses of Zn = 65 u, Na = 23 u, K = 39 u, C = 12 u, and O = 16 u.

47.Which of the following contains both covalent and ionic bonds ? 1)NaCl 2) NH3 3)NaOH 4)CO2 Explain the reason also.

How many of the given substances are soluble in water?Sugar, petrol, salt, vinegar, sand, oilExplain their property.

(a) Write balanced equations (i) when butane is burnt in oxygen (ii) preparation of ethylene from ethyl alcohol. (b) (i)Convert ethane to acetic acid (ii)Convert acetylene to ethane (iii)Convert acetic acid to ethyl alcohol (iv)Convert acetic acid to ethyl acetate.

In __ reaction exchange of partners takes place.

1,1-Diphenyl -2-butene. Show geometrical isomerism?

The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its: (a) oxide (b) hydride (c) sulphide (d) carbonate

List of all the amino acids.

A sample of ozone has the same mass aa 1 million molecules of oxygen.How many O3 molecules does the sample contain?

75 For a complex (d6-configuration) having =25000 cm-1and P = 15000 cm-1, the crystal field stabilisation energy is (1) 30,000 cm (2) -60,000 cm-1 (3) -30,000 cm- (4) +60,000 cm-1

In a diatomic molecule the bond distance is 1 x 10^{-8} cm. Its dipole moment is 1.2 D. What is the fractional electronic charge on each atom?(a) 0.50(c) 0.25(b)1.2×10^{-10}(d)1.

57. How many acyclic isomers of formula C5H8 have sp hybridised carbon atoms

What do you observe when (a) Lead nitrate is heated. (b) Chlorine water is exposed to sunlight. (c) Hydrogen peroxide is exposed to sunlight. (d) H2S gas is passed through copper sulphate solution. (e) Barium chloride is added to sodium sulphate solution.

What volume fo oxygen would be required to burn completely 400 ml. of acetylene [C2H2] Also, calculated the volume fo carbon dioxide formed. 2C2H2+502→4CO2+2H2O(l)

Mr. Samwell Tarly has to learn Chemistry to become a Maester. He is stuck with Kinetics. Will you help him? (Maester is just Master in their language) Choose the appropriate definition of rate constant.

Question 40.Fill in the missing data in the given table.

How coal was formed or found.?

(a) Name two metals which are found in nature mainly in the free state (as metallic elements). (b) Name two metals which are always found in the combined state. (c) What iron compound is present in haematite ore? Also, write its chemical formula.

Write the structural formulae and IUPAC name of second and third homologues.

What is self energy of solid non conducting sphere ?

How many electrons are present in the outermost shell of a carbon atom?4

Which metal salt gives a green coloured bead in the sodium carbonate bead test?

According to modern periodic table, the properties of elements are a periodic function of their:

If the molar ratio of two gases X2 and Y2 in the gaseous mixture is 2 : 5, then the ratio of number of atoms of X and Y in the same mixture will be

If pH of a solution is 5 then it indicates that concentration of [OH−] ions are

The oxygen family, also called the chalcogens, consists of the elements found in Group 16 of the periodic table and is considered among the main group elements.Which of the following has lowest boiling point ?[1 Mark]

calculate h and ph of solution obtained by dissolving 0.1 mole of CH3COONa in water to get 100 l solution. ka of CH3COOH= 2 x 10^-5