15280 + Interview Questions in Chemistry Page 80 InterviewSolution

3951.	How many benzene derivatives are possible for molecular formula c6h3cl3
Answer» How many benzene derivatives are possible for molecular formula c6h3cl3

Discussion

3952.	Complete and balance the following reactions. Give conditions, wherever necessary. a) CH3COONa+NaOHCaO−−−→Heat……+…… b) CH3OH+2[O]K2Cr2O7−−−−−−→Acidified……+ldots… c) C2H5Cl+KOH(aq)→……+…… d) CH3CH2OH+H2SO4(conc.)→……+…… e) C2H2+4[O]Alk.KMnO4−−−−−−−→…… [5 MARKS]
Answer» Complete and balance the following reactions. Give conditions, wherever necessary. a) $C H_{3} C O O N a + N a O H C a O - -- \to H e a t \dots \dots + \dots \dots$ b) $C H_{3} O H + 2 [O] K_{2} C r_{2} O_{7} - ----- \to A c i d i f i e d \dots \dots + l d o t s \dots$ c) $C_{2} H_{5} C l + K O H (a q) \to \dots \dots + \dots \dots$ d) $C H_{3} C H_{2} O H + H_{2} S O_{4} (c o n c .) \to \dots \dots + \dots \dots$ e) $C_{2} H_{2} + 4 [O] A l k . K M n O_{4} - ------ \to \dots \dots$ [5 MARKS]

Discussion

3953.	The isoelectronic pair is
Answer» The isoelectronic pair is

Discussion

3954.	Make lists of acidic salts ,basic salts and neutral salts with their source acids and bases
Answer» Make lists of acidic salts ,basic salts and neutral salts with their source acids and bases

Discussion

3955.	Name (formula is not acceptable) the gas produced in each of the following reactions:(i) By the action of concentrated nitric acid on copper.(ii) On warming ammonium sulphate with sodium hydroxide solution.
Answer» Name (formula is not acceptable) the gas produced in each of the following reactions: (i) By the action of concentrated nitric acid on copper. (ii) On warming ammonium sulphate with sodium hydroxide solution.

Discussion

3956.	Which of the following molecule(s) gives only acid(s) or acidic species on hydrolysis?
Answer» Which of the following molecule(s) gives only acid(s) or acidic species on hydrolysis?

Discussion

3957.	Give scientific reasons:(1) Grills of doors and windows are always painted before they are used.(2) Physical states of reactants and products are mentioned while writing a chemical equation.(3) Potassium Ferrocyanide is stored in dark coloured bottles and kept away from sunlight.(4) Iron articles rust readily whereas steel which is also mainly made of iron will not undergo corrosion.(5) Edible oil is not allowed to stand for a long time in an iron or tin container.
Answer» Give scientific reasons: (1) Grills of doors and windows are always painted before they are used. (2) Physical states of reactants and products are mentioned while writing a chemical equation. (3) Potassium Ferrocyanide is stored in dark coloured bottles and kept away from sunlight. (4) Iron articles rust readily whereas steel which is also mainly made of iron will not undergo corrosion. (5) Edible oil is not allowed to stand for a long time in an iron or tin container.

3957.

Give scientific reasons:(1) Grills of doors and windows are always painted before they are used.(2) Physical states of reactants and products are mentioned while writing a chemical equation.(3) Potassium Ferrocyanide is stored in dark coloured bottles and kept away from sunlight.(4) Iron articles rust readily whereas steel which is also mainly made of iron will not undergo corrosion.(5) Edible oil is not allowed to stand for a long time in an iron or tin container.

Answer»

Give scientific reasons:

(1) Grills of doors and windows are always painted before they are used.

(2) Physical states of reactants and products are mentioned while writing a chemical equation.

(3) Potassium Ferrocyanide is stored in dark coloured bottles and kept away from sunlight.

(4) Iron articles rust readily whereas steel which is also mainly made of iron will not undergo corrosion.

(5) Edible oil is not allowed to stand for a long time in an iron or tin container.

Discussion

3958.	what is inclination
Answer» what is inclination

Discussion

3959.	55.How many g of dibasic acid (mol. Weight 200) should be present in 100ml of the aqueous solution to give strength of 0.1N ?
Answer» 55.How many g of dibasic acid (mol. Weight 200) should be present in 100ml of the aqueous solution to give strength of 0.1N ?

Discussion

3960.	which is more acidic alcohols or phenols and why?
Answer» which is more acidic alcohols or phenols and why?

Discussion

3961.	A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide.(a) What kind of salt is sodium argentocyanide?(b) Why is it preferred to silver nitrate as an electrolyte?(c) State one condition to ensure that the deposit is smooth, firm and long lasting.(d) Write the reaction taking place at the cathode.(e) Write the reaction taking place at the anode.
Answer» A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide. (a) What kind of salt is sodium argentocyanide? (b) Why is it preferred to silver nitrate as an electrolyte? (c) State one condition to ensure that the deposit is smooth, firm and long lasting. (d) Write the reaction taking place at the cathode. (e) Write the reaction taking place at the anode.

Discussion

3962.	What were the criteria used by Mendeleev in creating his periodic table? [3 MARKS]
Answer» What were the criteria used by Mendeleev in creating his periodic table? [3 MARKS]

Discussion

3963.	Choose the correct alternative:The gas law which relates the volume of a gas to the number of molecules of the gas is:(a) Avogadro's Law(b) Gay-Lussac's Law(c) Boyle's Law(d) Charles' Law
Answer» Choose the correct alternative: The gas law which relates the volume of a gas to the number of molecules of the gas is: (a) Avogadro's Law (b) Gay-Lussac's Law (c) Boyle's Law (d) Charles' Law

Discussion

3964.	A substance X used for coating iron article is added to a blue solution of a reddish brown metal Y The colour of the solution gets discharged. Identify X and Y and also type of reaction
Answer» A substance X used for coating iron article is added to a blue solution of a reddish brown metal Y The colour of the solution gets discharged. Identify X and Y and also type of reaction

Discussion

3965.	Question 2Which of the following statements are usually correct for carbon compounds? These(i) Are good conductors of electricity(ii) Are poor conductor of electricity(iii) Have strong forces of attraction between their molecules(iv) Do not have strong forces of attraction between their molecules(a) (i) and (iii)(b) (ii) and (iii)(c) (i) and (iv)(d) (ii) and (iv)
Answer» Question 2 Which of the following statements are usually correct for carbon compounds? These (i) Are good conductors of electricity (ii) Are poor conductor of electricity (iii) Have strong forces of attraction between their molecules (iv) Do not have strong forces of attraction between their molecules (a) (i) and (iii) (b) (ii) and (iii) (c) (i) and (iv) (d) (ii) and (iv)

Discussion

3966.	Given reactions are the preparation method of alcohol, Find out X, Y, Z in the reaction?ROH+X→R−Cl+SO2+HClROH+Y→R−Cl+POCl3+HClROH+Z→R−Cl+H3PO3
Answer» Given reactions are the preparation method of alcohol, Find out X, Y, Z in the reaction? $R O H + X \to R - C l + S O_{2} + H C l$ $R O H + Y \to R - C l + P O C l_{3} + H C l$ $R O H + Z \to R - C l + H_{3} P O_{3}$

Discussion

3967.	(a) What is the colour of ferrous sulphate crystals? How does this colour change after heating?(b) Name the products formed on strongly heating ferrous sulphate crystals. What type of chemical reaction occurs in this change? Write chemical equation of the reaction.
Answer» (a) What is the colour of ferrous sulphate crystals? How does this colour change after heating? (b) Name the products formed on strongly heating ferrous sulphate crystals. What type of chemical reaction occurs in this change? Write chemical equation of the reaction.

Discussion

3968.	(a) Name the gas evolved when ethanol reacts with sodium. (b) What type of compound is formed when a carboxylic acid reacts with an alcohol in the presence of conc. H2SO4 ? (c) What will you observe when dilute ethanoic acid and dilute hydrochloric acid are put on universal indicator paper, one by one? What does it show?
Answer» (a) Name the gas evolved when ethanol reacts with sodium. (b) What type of compound is formed when a carboxylic acid reacts with an alcohol in the presence of conc. $H_{2} S O_{4}$ ? (c) What will you observe when dilute ethanoic acid and dilute hydrochloric acid are put on universal indicator paper, one by one? What does it show?

Discussion

3969.	The main component of coal is ______.
Answer» The main component of coal is ______.

Discussion

3970.	Question 17 Match the organisms given in Column I with their mode of nutrition given in Column II. Column IColumn II(a) Mango tree(i) Insectivorous plant(b) Mushroom(ii) Heterotroph(c) Pitcher plant(iii) Autotroph(d) Cuscuta(iv) Saprophyte(e) Elephant(v) Parasitic
Answer» Question 17 Match the organisms given in Column I with their mode of nutrition given in Column II. $\begin{matrix} C o l u m n I & C o l u m n I I (a) M a n g o t r e e & (i) I n s e c t i v o r o u s p l a n t (b) M u s h r o o m & (i i) H e t e r o t r o p h (c) P i t c h e r p l a n t & (i i i) A u t o t r o p h (d) C u s c u t a & (i v) S a p r o p h y t e (e) E l e p h a n t & (v) P a r a s i t i c \end{matrix}$

Discussion

3971.	76. Why Mn has low melting point than Chromium?
Answer» 76. Why Mn has low melting point than Chromium?

Discussion

3972.	Copper can be extracted by hydrometallurgy but not zinc. Explain.
Answer» Copper can be extracted by hydrometallurgy but not zinc. Explain.

Discussion

3973.	hybridisation of terminal carbons of allenes?
Answer» hybridisation of terminal carbons of allenes?

Discussion

3974.	The general formula for alcohol series is CnH2n+1OH. Which is the formula of the alcohol containing four carbon atoms?
Answer» The general formula for alcohol series is $C_{n} H_{2 n + 1} O H$ . Which is the formula of the alcohol containing four carbon atoms?

Discussion

3975.	48. 1 mol of KClO3 is thermally decomposed and excess of Al is burnt in the gaseous product. How many moles of Al2O3 are formed?
Answer» 48. 1 mol of KClO3 is thermally decomposed and excess of Al is burnt in the gaseous product. How many moles of Al2O3 are formed?

Discussion

3976.	How many co-ordination isomers are possible for the following complex? (Including given isomer)[Cr(NH3)6] [Fe(C2O4)3]
Answer» How many co-ordination isomers are possible for the following complex? (Including given isomer) $[C r (N H_{3})_{6}] [F e (C_{2} O_{4})_{3}]$

Discussion

3977.	The pencil leads are made of mainly : (a) lithium (b) charcoal (c) lead (d) graphite
Answer» The pencil leads are made of mainly : (a) lithium (b) charcoal (c) lead (d) graphite

Discussion

3978.	11. What will be the product when 4 hydroxy benzyl alcohol react with hydrochloric acid in the presence of heat?
Answer» 11. What will be the product when 4 hydroxy benzyl alcohol react with hydrochloric acid in the presence of heat?

Discussion

3979.	The atomic number of an element X is 16.(a) Write down the electronic configuration of X.(b) What will be the valency of X?
Answer» The atomic number of an element X is 16. (a) Write down the electronic configuration of X. (b) What will be the valency of X?

Discussion

3980.	Which of the following is incorrect with respect to electromeric effect?
Answer» Which of the following is incorrect with respect to electromeric effect?

Discussion

3981.	Name one metal which has a low melting point.
Answer» Name one metal which has a low melting point.

Discussion

3982.	For the complete combustion of 4 litres of CO at NTP, the required volume of O_{2 }at NTP is:- (1) 4 litres (2) 8 litres (3) 2 litres (4) 1 litre
Answer» For the complete combustion of 4 litres of CO at NTP, the required volume of O_{2 }at NTP is:- (1) 4 litres (2) 8 litres (3) 2 litres (4) 1 litre

Discussion

3983.	Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic shells but different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of the elements A and B are basic in nature while those of E and F are acidic. The oxide of element D is almost neutral. Answer the following questions based on the information given herein:(a) To which group or period of the periodic table do the listed elements belong?(b) Which one of the eight elements is likely to be a noble gas?(c) Which one of the eight elements would have the largest atomic radius?(d) Which two elements amongst these are likely to be non-metals?(e) Which one of the these eight elements is likely to be a semi-metal or metalloid?
Answer» Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic shells but different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of the elements A and B are basic in nature while those of E and F are acidic. The oxide of element D is almost neutral. Answer the following questions based on the information given herein: (a) To which group or period of the periodic table do the listed elements belong? (b) Which one of the eight elements is likely to be a noble gas? (c) Which one of the eight elements would have the largest atomic radius? (d) Which two elements amongst these are likely to be non-metals? (e) Which one of the these eight elements is likely to be a semi-metal or metalloid?

Discussion

3984.	Why single carbon covalent are only saturated hydrocarbons
Answer» Why single carbon covalent are only saturated hydrocarbons

Discussion

3985.	19. How methane can be halogenate and form carbon tetra chloride. And where the hydrogen gone
Answer» 19. How methane can be halogenate and form carbon tetra chloride. And where the hydrogen gone

Discussion

3986.	Which is the correct increasing order of reducing power of the given metals?Standard electrode potentials:K++e−→K; E0=−2.93 VAg++e−→Ag; E0=0.80 VHg2+2+e−→2Hg; E0=0.79 VMg2++e−→Mg; E0=−2.37 VCr3++e−→Cr; E0=−0.74 V
Answer» Which is the correct increasing order of reducing power of the given metals? Standard electrode potentials: $K^{+} + e^{-} \to K; E^{0} = - 2.93 V A g^{+} + e^{-} \to A g; E^{0} = 0.80 V H g_{2}^{2 +} + e^{-} \to 2 H g; E^{0} = 0.79 V M g^{2 +} + e^{-} \to M g; E^{0} = - 2.37 V C r^{3 +} + e^{-} \to C r; E^{0} = - 0.74 V$

Discussion

3987.	The organic compounds which are isomeric with one another are : (a) alcohols and aldehydes (b) aldehydes and carboxylic acids (c) ketones and aldehydes (d) alcohols and ketones
Answer» The organic compounds which are isomeric with one another are : (a) alcohols and aldehydes (b) aldehydes and carboxylic acids (c) ketones and aldehydes (d) alcohols and ketones

Discussion

3988.	Electrodes are immersed in water and electric current is passed through it. Which of the following statements is correct?
Answer» Electrodes are immersed in water and electric current is passed through it. Which of the following statements is correct?

Discussion

3989.	67. Which ion has highest conductivity in aqueous solution? 1.Li^+ 2.Na^+ 3.Mg^+ 4.Be^+
Answer» 67. Which ion has highest conductivity in aqueous solution? 1.Li^+ 2.Na^+ 3.Mg^+ 4.Be^+

Discussion

3990.	An air bubble starts rising from the bottom of a lake. Its diameter is 3.6 mm at the bottom and 4 mm at the surface. The depth of the lake is 250 cm and the temperature at the surface is 40 ∘C. What is the approximate temperature at the bottom of the lake in ∘C.?Given atmospheric pressure=76 cm of Hg
Answer» An air bubble starts rising from the bottom of a lake. Its diameter is $3.6 mm$ at the bottom and $4 mm$ at the surface. The depth of the lake is $250 cm$ and the temperature at the surface is $40^{\circ} C$ . What is the approximate temperature at the bottom of the lake in $^{\circ} C$ .? Given atmospheric pressure $= 76 cm of Hg$

Discussion

3991.	Why are some elements chemically inert?
Answer» Why are some elements chemically inert?

Discussion

3992.	Question 2A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?
Answer» Question 2 A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?

Discussion

3993.	Questions 12(c) Give reason why aluminium is a highly reactive metal, yet it is used to make utensils for cooking?
Answer» Questions 12(c) Give reason why aluminium is a highly reactive metal, yet it is used to make utensils for cooking?

Discussion

3994.	Complete the following chemical reactions. PbS(s)+H2O2(aq)→ MnO−4(aq)+H2O(g)→ CaO(s)+H2O(l)→ AlCl3(g)+H2O(l)→ Ca3N2(s)+H2O(l)→ Classify the above into (a) hydrolysis, (b) redox and (c) hydration reactions.
Answer» Complete the following chemical reactions. $P b S_{(s)} + H_{2} O_{2 (a q)} \to$ $M n O_{4 (a q)}^{-} + H_{2} O_{(g)} \to$ $C a O_{(s)} + H_{2} O_{(l)} \to$ $A l C l_{3 (g)} + H_{2} O_{(l)} \to$ $C a_{3} N_{2 (s)} + H_{2} O_{(l)} \to$ Classify the above into (a) hydrolysis, (b) redox and (c) hydration reactions.

3994.

Complete the following chemical reactions. PbS(s)+H2O2(aq)→ MnO−4(aq)+H2O(g)→ CaO(s)+H2O(l)→ AlCl3(g)+H2O(l)→ Ca3N2(s)+H2O(l)→ Classify the above into (a) hydrolysis, (b) redox and (c) hydration reactions.

Answer»

Complete the following chemical reactions.
$P b S_{(s)} + H_{2} O_{2 (a q)} \to$

$M n O_{4 (a q)}^{-} + H_{2} O_{(g)} \to$

$C a O_{(s)} + H_{2} O_{(l)} \to$

$A l C l_{3 (g)} + H_{2} O_{(l)} \to$

$C a_{3} N_{2 (s)} + H_{2} O_{(l)} \to$
Classify the above into (a) hydrolysis, (b) redox and (c) hydration reactions.

Discussion

3995.	ntTwo vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B . Under such conditions, the density of A is found to be 1.5 times the density of B. the ratio of molecular wt. of A and B is:n nta) 1/2n ntb) 2/3n ntc) 3/4n ntd) 2n
Answer» ntTwo vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B . Under such conditions, the density of A is found to be 1.5 times the density of B. the ratio of molecular wt. of A and B is:n nta) 1/2n ntb) 2/3n ntc) 3/4n ntd) 2n

Discussion

3996.

Copy and complete the following table which refers to two practical applications of electrolysis: Anode Electrolyte Cathode Silver plating a spoon Solution of potassium argentocyanide Purification of copper

Answer» Copy and complete the following table which refers to two practical applications of electrolysis:

	Anode	Electrolyte	Cathode
Silver plating a spoon		Solution of potassium argentocyanide
Purification of copper

Discussion

3997.	34. %natural abundance of 79Br and 81Br are 51% and 49% respectively then average atomic mass Br
Answer» 34. %natural abundance of 79Br and 81Br are 51% and 49% respectively then average atomic mass Br

Discussion

3998.	Alkanes are extensively used in manufacture of ___
Answer» Alkanes are extensively used in manufacture of ___

Discussion

3999.	Sulphuric acid is also used in the manufacture of fibers like
Answer» Sulphuric acid is also used in the manufacture of fibers like

Discussion

4000.	What is formula of Cement
Answer» What is formula of Cement

Discussion

Explore topic-wise InterviewSolutions in .

How many benzene derivatives are possible for molecular formula c6h3cl3

The isoelectronic pair is

Make lists of acidic salts ,basic salts and neutral salts with their source acids and bases

Name (formula is not acceptable) the gas produced in each of the following reactions:(i) By the action of concentrated nitric acid on copper.(ii) On warming ammonium sulphate with sodium hydroxide solution.

Which of the following molecule(s) gives only acid(s) or acidic species on hydrolysis?

what is inclination

55.How many g of dibasic acid (mol. Weight 200) should be present in 100ml of the aqueous solution to give strength of 0.1N ?

which is more acidic alcohols or phenols and why?

What were the criteria used by Mendeleev in creating his periodic table? [3 MARKS]

Choose the correct alternative:The gas law which relates the volume of a gas to the number of molecules of the gas is:(a) Avogadro's Law(b) Gay-Lussac's Law(c) Boyle's Law(d) Charles' Law

A substance X used for coating iron article is added to a blue solution of a reddish brown metal Y The colour of the solution gets discharged. Identify X and Y and also type of reaction

Given reactions are the preparation method of alcohol, Find out X, Y, Z in the reaction?ROH+X→R−Cl+SO2+HClROH+Y→R−Cl+POCl3+HClROH+Z→R−Cl+H3PO3

(a) What is the colour of ferrous sulphate crystals? How does this colour change after heating?​(b) Name the products formed on strongly heating ferrous sulphate crystals. What type of chemical reaction occurs in this change? Write chemical equation of the reaction.

The main component of coal is ______.

Question 17 Match the organisms given in Column I with their mode of nutrition given in Column II. Column IColumn II(a) Mango tree(i) Insectivorous plant(b) Mushroom(ii) Heterotroph(c) Pitcher plant(iii) Autotroph(d) Cuscuta(iv) Saprophyte(e) Elephant(v) Parasitic

76. Why Mn has low melting point than Chromium?

Copper can be extracted by hydrometallurgy but not zinc. Explain.

hybridisation of terminal carbons of allenes?

The general formula for alcohol series is CnH2n+1OH. Which is the formula of the alcohol containing four carbon atoms?

48. 1 mol of KClO3 is thermally decomposed and excess of Al is burnt in the gaseous product. How many moles of Al2O3 are formed?

How many co-ordination isomers are possible for the following complex? (Including given isomer)[Cr(NH3)6] [Fe(C2O4)3]

The pencil leads are made of mainly : (a) lithium (b) charcoal (c) lead (d) graphite

11. What will be the product when 4 hydroxy benzyl alcohol react with hydrochloric acid in the presence of heat?

The atomic number of an element X is 16.(a) Write down the electronic configuration of X.(b) What will be the valency of X?

Which of the following is incorrect with respect to electromeric effect?

Name one metal which has a low melting point.

For the complete combustion of 4 litres of CO at NTP, the required volume of O_{2 }at NTP is:- (1) 4 litres (2) 8 litres (3) 2 litres (4) 1 litre

Why single carbon covalent are only saturated hydrocarbons

19. How methane can be halogenate and form carbon tetra chloride. And where the hydrogen gone

Which is the correct increasing order of reducing power of the given metals?Standard electrode potentials:K++e−→K; E0=−2.93 VAg++e−→Ag; E0=0.80 VHg2+2+e−→2Hg; E0=0.79 VMg2++e−→Mg; E0=−2.37 VCr3++e−→Cr; E0=−0.74 V

The organic compounds which are isomeric with one another are : (a) alcohols and aldehydes (b) aldehydes and carboxylic acids (c) ketones and aldehydes (d) alcohols and ketones

Electrodes are immersed in water and electric current is passed through it. Which of the following statements is correct?

67. Which ion has highest conductivity in aqueous solution? 1.Li^+ 2.Na^+ 3.Mg^+ 4.Be^+

Why are some elements chemically inert?

Question 2A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?

Questions 12(c) Give reason why aluminium is a highly reactive metal, yet it is used to make utensils for cooking?

Complete the following chemical reactions. PbS(s)+H2O2(aq)→ MnO−4(aq)+H2O(g)→ CaO(s)+H2O(l)→ AlCl3(g)+H2O(l)→ Ca3N2(s)+H2O(l)→ Classify the above into (a) hydrolysis, (b) redox and (c) hydration reactions.

ntTwo vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B . Under such conditions, the density of A is found to be 1.5 times the density of B. the ratio of molecular wt. of A and B is:n nta) 1/2n ntb) 2/3n ntc) 3/4n ntd) 2n

Copy and complete the following table which refers to two practical applications of electrolysis: Anode Electrolyte Cathode Silver plating a spoon Solution of potassium argentocyanide Purification of copper

34. %natural abundance of 79Br and 81Br are 51% and 49% respectively then average atomic mass Br

Alkanes are extensively used in manufacture of ___

Sulphuric acid is also used in the manufacture of fibers like

What is formula of Cement

(a) What is the colour of ferrous sulphate crystals? How does this colour change after heating?(b) Name the products formed on strongly heating ferrous sulphate crystals. What type of chemical reaction occurs in this change? Write chemical equation of the reaction.