15280 + Interview Questions in Chemistry Page 139 InterviewSolution

6901.	Identify the mixtures and compounds.1. Sea water2. Distilled water3.Graphite
Answer» Identify the mixtures and compounds. 1. Sea water 2. Distilled water 3.Graphite

Discussion

6902.	During the laboratory preparation, how is ammonia dried and collected?
Answer» During the laboratory preparation, how is ammonia dried and collected?

Discussion

6903.	Q 24/30 On addition of 1 ml of solution of 10% NaCl to100 ml of red gold sol in presence of 0.25 g of starch, thecoagulation is just prevented. The gold number of starch is
Answer» Q 24/30 On addition of 1 ml of solution of 10% NaCl to100 ml of red gold sol in presence of 0.25 g of starch, thecoagulation is just prevented. The gold number of starch is

Discussion

6904.	which of the following order is /are correct: (1) H3PO4 >H3PO3 >H3PO2 → REDUCING POWER (2) H3PO4 >H3PO3 >H3PO2 → ACIDIC STRENGTH (3) HClO >HClO2 >HClO3> HClO4 → ACIDIC STRENGTH (4) BF3< BCl3
Answer» which of the following order is /are correct: (1) H3PO4 >H3PO3 >H3PO2 → REDUCING POWER (2) H3PO4 >H3PO3 >H3PO2 → ACIDIC STRENGTH (3) HClO >HClO2 >HClO3> HClO4 → ACIDIC STRENGTH (4) BF3< BCl3

Discussion

6905.	Identify the ester compound in the options given below.
Answer» Identify the ester compound in the options given below.

Discussion

6906.	18. How to know stability of carbanion is there any rule. Why aniline doesn't sublime on heating
Answer» 18. How to know stability of carbanion is there any rule. Why aniline doesn't sublime on heating

Discussion

6907.	A non-metal X which is the largest constituent of air combines with hydrogen when heated in the presence of iron as catalyst to form a gas Y. When gas Y is treated with sulphuric acid, it forms a compound Z which is used as a chemical fertiliser. (a) What are X, Y and Z? (b) To which group of periodic table does X belong? (c) Name the period of the periodic table in which X is placed. (d) Which element is placed just before X in the period? (e) Which element is placed just after X in the period?
Answer» A non-metal X which is the largest constituent of air combines with hydrogen when heated in the presence of iron as catalyst to form a gas Y. When gas Y is treated with sulphuric acid, it forms a compound Z which is used as a chemical fertiliser. (a) What are X, Y and Z? (b) To which group of periodic table does X belong? (c) Name the period of the periodic table in which X is placed. (d) Which element is placed just before X in the period? (e) Which element is placed just after X in the period?

6907.

A non-metal X which is the largest constituent of air combines with hydrogen when heated in the presence of iron as catalyst to form a gas Y. When gas Y is treated with sulphuric acid, it forms a compound Z which is used as a chemical fertiliser. (a) What are X, Y and Z? (b) To which group of periodic table does X belong? (c) Name the period of the periodic table in which X is placed. (d) Which element is placed just before X in the period? (e) Which element is placed just after X in the period?

Answer»

A non-metal X which is the largest constituent of air combines with hydrogen when heated in the presence of iron as catalyst to form a gas Y. When gas Y is treated with sulphuric acid, it forms a compound Z which is used as a chemical fertiliser.

(a) What are X, Y and Z?

(b) To which group of periodic table does X belong?

(c) Name the period of the periodic table in which X is placed.

(d) Which element is placed just before X in the period?

(e) Which element is placed just after X in the period?

Discussion

6908.	H2O2 is oxidised by MnO−4 in acidic medium to form O2 and Mn2+,how many grams of O2 are produced from 1.5×10−3 moles of MnO−4 M and per 1.2 milligrams of H2O
Answer» $H_{2} O_{2}$ is oxidised by $M n O_{4}^{-}$ in acidic medium to form $O_{2}$ and ${M n}^{2 +}$ ,how many grams of $O_{2}$ are produced from $1.5 \times 10^{- 3}$ moles of $M n O_{4}^{-}$ M and per 1.2 milligrams of $H_{2} O$

Discussion

6909.	Choose the correct electronic configuration for silicon atom.
Answer» Choose the correct electronic configuration for silicon atom.

Discussion

6910.	Why do ions form bonds though they have already attained noble gas configuration by losing or gaining electrons?
Answer» Why do ions form bonds though they have already attained noble gas configuration by losing or gaining electrons?

Discussion

6911.	Name an organic compound which is : (a) used for illuminating country houses, (b) used for making a household plastic material. (c) called 'wood spirit', (d) poisonous and contain OH group, (e) consumed as a drink, (f) made from water gas, (g) solvent for ethanol.
Answer» Name an organic compound which is : (a) used for illuminating country houses, (b) used for making a household plastic material. (c) called 'wood spirit', (d) poisonous and contain OH group, (e) consumed as a drink, (f) made from water gas, (g) solvent for ethanol.

Discussion

6912.	Define homoatomic and heteroatomic molecules.
Answer» Define homoatomic and heteroatomic molecules.

Discussion

6913.	Evaluate using formula:(a) 4P3(b) 3P2(c) 5P4
Answer» Evaluate using formula: (a) ⁴P₃ (b) ³P₂ (c) ⁵P₄

6913.

Evaluate using formula:(a) 4P3(b) 3P2(c) 5P4

Answer»

Evaluate using formula:

(a) ⁴P₃

(b) ³P₂

(c) ⁵P₄

Discussion

6914.	Which of the following are the allotropes of carbon?
Answer» Which of the following are the allotropes of carbon?

Discussion

6915.	Define electrovalent bond.
Answer» Define electrovalent bond.

Discussion

6916.	21. Calculate no. Of molecules in 2mole of oxygen and also find no. Of atom
Answer» 21. Calculate no. Of molecules in 2mole of oxygen and also find no. Of atom

Discussion

6917.	AgNO3 + NaCl → AgCl +NaNO3 is an example of a/an ___ reaction and a/an ___ reaction.
Answer» $A g N O_{3} + N a C l \to A g C l + N a N O_{3}$ is an example of a/an ___ reaction and a/an ___ reaction.

Discussion

6918.	Match the Following: Column-I (Hydrocarbon)Column-II (Molecular Formula))(A)Butene(P)C4H6(B)Butyne(Q)C6H6(C)Benzene(R)C6H10(D)Hexyne(S)C4H8
Answer» Match the Following: $\begin{matrix} Column-I (Hydrocarbon) & Column-II (Molecular Formula)) (A) B u t e n e & (P) C_{4} H_{6} (B) B u t y n e & (Q) C_{6} H_{6} (C) B e n z e n e & (R) C_{6} H_{10} (D) H e x y n e & (S) C_{4} H_{8} \end{matrix}$

Discussion

6919.	Name the chloride of a metal which is soluble in excess of ammonium hydroxide.
Answer» Name the chloride of a metal which is soluble in excess of ammonium hydroxide.

Discussion

6920.	how to find whether optical and geometrical isomerism are possible for any coordination compound?
Answer» how to find whether optical and geometrical isomerism are possible for any coordination compound?

Discussion

6921.	The number of electrons present in 60 g water is
Answer» The number of electrons present in 60 g water is

Discussion

6922.	how to calculate the co ordination number of NaCl?
Answer» how to calculate the co ordination number of NaCl?

Discussion

6923.	Name the kind of particle present in sodium hydroxide solution Carbonic acid Sugar solution
Answer» Name the kind of particle present in sodium hydroxide solution Carbonic acid Sugar solution

Discussion

6924.	(a) Distinguish between the saturated hydrocarbon ethane and the unsaturated hydrocarbon ethene by drawing their structural formulae.(b) Addition reaction and substitution reactions are types of organic reactions. Which type of reaction is shown by:(i) ethane(ii) ethene?(c) (i) Write the equation for the complete combustion of ethane.(ii) Using appropriate catalysts, ethane can be oxidized to an alcohol, an aldehyde and an acid. Name the alcohol, aldehyde and acid formed when ethane is oxidized.(d) (i) Why is pure acetic acid known as glacial acetic acid?(ii) What type of compound is formed by the reaction between acetic acid and an alcohol?
Answer» (a) Distinguish between the saturated hydrocarbon ethane and the unsaturated hydrocarbon ethene by drawing their structural formulae. (b) Addition reaction and substitution reactions are types of organic reactions. Which type of reaction is shown by: (i) ethane (ii) ethene? (c) (i) Write the equation for the complete combustion of ethane. (ii) Using appropriate catalysts, ethane can be oxidized to an alcohol, an aldehyde and an acid. Name the alcohol, aldehyde and acid formed when ethane is oxidized. (d) (i) Why is pure acetic acid known as glacial acetic acid? (ii) What type of compound is formed by the reaction between acetic acid and an alcohol?

Discussion

6925.	31. The spectrum of He is expected to be similar tothat ofH (1)(3) Na(2) Li(4) He
Answer» 31. The spectrum of He is expected to be similar tothat ofH (1)(3) Na(2) Li(4) He

Discussion

6926.	The chemical which is not required for the preparation of soap in the laboratory is : (a) vegetable oil (b) baking soda (c) caustic soda (d) common salt
Answer» The chemical which is not required for the preparation of soap in the laboratory is : (a) vegetable oil (b) baking soda (c) caustic soda (d) common salt

6926.

The chemical which is not required for the preparation of soap in the laboratory is : (a) vegetable oil (b) baking soda (c) caustic soda (d) common salt

Answer»

The chemical which is not required for the preparation of soap in the laboratory is :

(a) vegetable oil (b) baking soda (c) caustic soda (d) common salt

Discussion

6927.	Which of the following pair of compounds undergo displacement reaction when they react with each other?
Answer» Which of the following pair of compounds undergo displacement reaction when they react with each other?

Discussion

6928.	What is the reaction of freshly precipitated aluminium hydroxide with caustic soda solution? Give equation.
Answer» What is the reaction of freshly precipitated aluminium hydroxide with caustic soda solution? Give equation.

Discussion

6929.	Dissolving of quick lime in water is accompanied by:
Answer» Dissolving of quick lime in water is accompanied by:

Discussion

6930.	For the elementary reaction M⟶N, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is:
Answer» For the elementary reaction $M ⟶ N$ , the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is:

Discussion

6931.	Fresh milk has a pH of 6. When it changes into curd (yogurt), will its pH value increase or decrease? Why? [2 MARKS]
Answer» Fresh milk has a pH of 6. When it changes into curd (yogurt), will its pH value increase or decrease? Why? [2 MARKS]

Discussion

6932.	f(x)=3x+sinx.Check bijectivity
Answer» f(x)=3x+sinx. Check bijectivity

Discussion

6933.	Which of the following is not an organic acid?
Answer» Which of the following is not an organic acid?

Discussion

6934.	Which of the following properties generally increases on moving from top to bottom ?
Answer» Which of the following properties generally increases on moving from top to bottom ?

Discussion

6935.	A sample of dolomite contained 45% of CaCO3, 40%of MgCO3 and 15%clay calculate the weight of sulphuric acid of 30% strength required to react completely with 10g of sample
Answer» A sample of dolomite contained 45% of CaCO3, 40%of MgCO3 and 15%clay calculate the weight of sulphuric acid of 30% strength required to react completely with 10g of sample

Discussion

6936.	Find the dimensions for electric power.
Answer» Find the dimensions for electric power.

Discussion

6937.	Give the balanced equation for the following conversions:(i) Ammonia to nitrogen using an acidic gas.(ii) Ammonia to nitrogen using copper oxide.(iii) Ammonia to nitrogen using oxygen.(iv) Ammonia to nitrogen trichloride.(v) Ammonia to ammonium sulphate.(vi) Ammonia solution to an amphoteric hydroxide.(vii) Ammonia to ammonium carbonate.(viii) Copper oxide to copper.
Answer» Give the balanced equation for the following conversions: (i) Ammonia to nitrogen using an acidic gas. (ii) Ammonia to nitrogen using copper oxide. (iii) Ammonia to nitrogen using oxygen. (iv) Ammonia to nitrogen trichloride. (v) Ammonia to ammonium sulphate. (vi) Ammonia solution to an amphoteric hydroxide. (vii) Ammonia to ammonium carbonate. (viii) Copper oxide to copper.

Discussion

6938.	ntThe work function of metal is 1 eV. Light of wavelength 3000 is incident on this metal surface. The velocity of emitted photo electrons will ben
Answer» ntThe work function of metal is 1 eV. Light of wavelength 3000 is incident on this metal surface. The velocity of emitted photo electrons will ben

Discussion

6939.	Which of the following gas is liberated during the reaction between sodium and ethanol?
Answer» Which of the following gas is liberated during the reaction between sodium and ethanol?

Discussion

6940.	A chemical reaction where two compounds react, and the cation and the anion of the two reactants switch places, forming two new compounds or products is called as a ___ reaction.
Answer» A chemical reaction where two compounds react, and the cation and the anion of the two reactants switch places, forming two new compounds or products is called as a ___ reaction.

Discussion

6941.	If 0.3 mole of n2 and some he are mixed in a vessel in a 1:4 ratio by moles then total pressure was 3atm if the temperature is 300K then volume of n2 will be?
Answer» If 0.3 mole of n2 and some he are mixed in a vessel in a 1:4 ratio by moles then total pressure was 3atm if the temperature is 300K then volume of n2 will be?

Discussion

6942.	. Assertion : Fluorine has a less negative electronaffinity than chlorine. Reason : There is relatively greater effectivenessof 2p-electrons in the small F atom to repel theadditional electron entering the atom than to3p-electrons in the larger Cl atom.
Answer» . Assertion : Fluorine has a less negative electronaffinity than chlorine. Reason : There is relatively greater effectivenessof 2p-electrons in the small F atom to repel theadditional electron entering the atom than to3p-electrons in the larger Cl atom.

Discussion

6943.	The molecular formula for 2,4-dimethylhexane is _____.
Answer» The molecular formula for 2,4-dimethylhexane is _____.

Discussion

6944.	A milkman adds a very small amount of baking soda to fresh milk. (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline? (b) Why does this milk take a long time to set as curd?
Answer» A milkman adds a very small amount of baking soda to fresh milk. (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline? (b) Why does this milk take a long time to set as curd?

6944.

A milkman adds a very small amount of baking soda to fresh milk. (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline? (b) Why does this milk take a long time to set as curd?

Answer»

A milkman adds a very small amount of baking soda to fresh milk.

(a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline?

(b) Why does this milk take a long time to set as curd?

Discussion

6945.	Which of the following reactions increases production of dihydrogen from synthesis gas?
Answer» Which of the following reactions increases production of dihydrogen from synthesis gas?

Discussion

6946.	During electrolytic reduction, the metals are deposited at:
Answer» During electrolytic reduction, the metals are deposited at:

Discussion

6947.	Aluminium is extracted from its chief ore, bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction.(a) Write three balanced equations for the purification of bauxite by Hall's process.(b) Name a chemical used for dissolving aluminium oxide. In which state of sub-division is the chemical used?(c) Write an equation for the reaction which takes place at the anode during the extraction of aluminium by the electrolytic process.(d) Mention one reason for the use of aluminium in thermite welding. Which particular property of cast iron makes it unsuitable for the construction of bridges?
Answer» Aluminium is extracted from its chief ore, bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction. (a) Write three balanced equations for the purification of bauxite by Hall's process. (b) Name a chemical used for dissolving aluminium oxide. In which state of sub-division is the chemical used? (c) Write an equation for the reaction which takes place at the anode during the extraction of aluminium by the electrolytic process. (d) Mention one reason for the use of aluminium in thermite welding. Which particular property of cast iron makes it unsuitable for the construction of bridges?

Discussion

6948.	A sudden large jump between the values of 2nd and 3rd IP of an element would be associated with the electronic configuration 1.1s2,2s2 2p6,3s1 2.1s2,2s2 2p6,3s2 3p5 3.1s2,2s2 2p6, 3s2 3p2 4.1s2,2s2 2p6 3s
Answer» A sudden large jump between the values of 2nd and 3rd IP of an element would be associated with the electronic configuration 1.1s2,2s2 2p6,3s1 2.1s2,2s2 2p6,3s2 3p5 3.1s2,2s2 2p6, 3s2 3p2 4.1s2,2s2 2p6 3s

Discussion

6949.	In a group, a particular element has the lowest ionization potential, does it ionize most easily or least easily? Explain with example.
Answer» In a group, a particular element has the lowest ionization potential, does it ionize most easily or least easily? Explain with example.

Discussion

6950.	Among tiger, fox, snake and antelope; which of the following creatures would be considered as a topmost predator?
Answer» Among tiger, fox, snake and antelope; which of the following creatures would be considered as a topmost predator?

Discussion

Explore topic-wise InterviewSolutions in .

Identify the mixtures and compounds.1. Sea water2. Distilled water3.Graphite

During the laboratory preparation, how is ammonia dried and collected?

Q 24/30 On addition of 1 ml of solution of 10% NaCl to100 ml of red gold sol in presence of 0.25 g of starch, thecoagulation is just prevented. The gold number of starch is

which of the following order is /are correct: (1) H3PO4 >H3PO3 >H3PO2 → REDUCING POWER (2) H3PO4 >H3PO3 >H3PO2 → ACIDIC STRENGTH (3) HClO >HClO2 >HClO3> HClO4 → ACIDIC STRENGTH (4) BF3< BCl3

Identify the ester compound in the options given below.

18. How to know stability of carbanion is there any rule. Why aniline doesn't sublime on heating

H2O2 is oxidised by MnO−4 in acidic medium to form O2 and Mn2+,how many grams of O2 are produced from 1.5×10−3 moles of MnO−4 M and per 1.2 milligrams of H2O

Choose the correct electronic configuration for silicon atom.

Why do ions form bonds though they have already attained noble gas configuration by losing or gaining electrons?

Name an organic compound which is : (a) used for illuminating country houses, (b) used for making a household plastic material. (c) called 'wood spirit', (d) poisonous and contain OH group, (e) consumed as a drink, (f) made from water gas, (g) solvent for ethanol.

Define homoatomic and heteroatomic molecules.

Evaluate using formula:(a) 4P3(b) 3P2(c) 5P4

Which of the following are the allotropes of carbon?

Define electrovalent bond.

21. Calculate no. Of molecules in 2mole of oxygen and also find no. Of atom

AgNO3 + NaCl → AgCl +NaNO3 is an example of a/an ___ reaction and a/an ___ reaction.

Match the Following: Column-I (Hydrocarbon)Column-II (Molecular Formula))(A)Butene(P)C4H6(B)Butyne(Q)C6H6(C)Benzene(R)C6H10(D)Hexyne(S)C4H8

Name the chloride of a metal which is soluble in excess of ammonium hydroxide.

how to find whether optical and geometrical isomerism are possible for any coordination compound?

The number of electrons present in 60 g water is

how to calculate the co ordination number of NaCl?

Name the kind of particle present in sodium hydroxide solution Carbonic acid Sugar solution

31. The spectrum of He is expected to be similar tothat ofH (1)(3) Na(2) Li(4) He

The chemical which is not required for the preparation of soap in the laboratory is : (a) vegetable oil (b) baking soda (c) caustic soda (d) common salt

Which of the following pair of compounds undergo displacement reaction when they react with each other?

What is the reaction of freshly precipitated aluminium hydroxide with caustic soda solution? Give equation.

Dissolving of quick lime in water is accompanied by:

For the elementary reaction M⟶N, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is:

Fresh milk has a pH of 6. When it changes into curd (yogurt), will its pH value increase or decrease? Why? [2 MARKS]

f(x)=3x+sinx.Check bijectivity

Which of the following is not an organic acid?

Which of the following properties generally increases on moving from top to bottom ?

A sample of dolomite contained 45% of CaCO3, 40%of MgCO3 and 15%clay calculate the weight of sulphuric acid of 30% strength required to react completely with 10g of sample

Find the dimensions for electric power.

ntThe work function of metal is 1 eV. Light of wavelength 3000 is incident on this metal surface. The velocity of emitted photo electrons will ben

Which of the following gas is liberated during the reaction between sodium and ethanol?

A chemical reaction where two compounds react, and the cation and the anion of the two reactants switch places, forming two new compounds or products is called as a ___ reaction.

If 0.3 mole of n2 and some he are mixed in a vessel in a 1:4 ratio by moles then total pressure was 3atm if the temperature is 300K then volume of n2 will be?

. Assertion : Fluorine has a less negative electronaffinity than chlorine. Reason : There is relatively greater effectivenessof 2p-electrons in the small F atom to repel theadditional electron entering the atom than to3p-electrons in the larger Cl atom.

The molecular formula for 2,4-dimethylhexane is _____.

A milkman adds a very small amount of baking soda to fresh milk. (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline? (b) Why does this milk take a long time to set as curd?

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

During electrolytic reduction, the metals are deposited at:

A sudden large jump between the values of 2nd and 3rd IP of an element would be associated with the electronic configuration 1.1s2,2s2 2p6,3s1 2.1s2,2s2 2p6,3s2 3p5 3.1s2,2s2 2p6, 3s2 3p2 4.1s2,2s2 2p6 3s

In a group, a particular element has the lowest ionization potential, does it ionize most easily or least easily? Explain with example.

Among tiger, fox, snake and antelope; which of the following creatures would be considered as a topmost predator?

AgNO3 + NaCl → AgCl +NaNO3 is an example of a/an _ reaction and a/an _ reaction.