15280 + Interview Questions in Chemistry Page 115 InterviewSolution

5701.	Which of the following is an oxidising agent in 2Mg+O2(g)→2MgO(s)
Answer» Which of the following is an oxidising agent in $2 M g + O_{2} (g) \to 2 M g O (s)$

Discussion

5702.	State the first limitation of Mendeleev’s Periodic Table.
Answer» State the first limitation of Mendeleev’s Periodic Table.

Discussion

5703.	If the frequency of a certain wave is 20×104 s−1, what would be the energy of this wave?
Answer» If the frequency of a certain wave is $20 \times 10^{4} s^{- 1}$ , what would be the energy of this wave?

Discussion

5704.	Which of the following can be used as a solvent in dry cleaning?
Answer» Which of the following can be used as a solvent in dry cleaning?

Discussion

5705.	does only carbon form covalent bond
Answer» does only carbon form covalent bond

Discussion

5706.	Complete the following chemical equation: Ca(HCO3)2+HCl→
Answer» Complete the following chemical equation: ${C a (H C O_{3})}_{2} + H C l \to$

Discussion

5707.	What is angular displacement formula
Answer» What is angular displacement formula

Discussion

5708.	The indicator which produces a pink colour in an alkaline solution is : (a) methyl orange (b) turmeric paper (c) phenolphthalein (d) litmus paper
Answer» The indicator which produces a pink colour in an alkaline solution is : (a) methyl orange (b) turmeric paper (c) phenolphthalein (d) litmus paper

5708.

The indicator which produces a pink colour in an alkaline solution is : (a) methyl orange (b) turmeric paper (c) phenolphthalein (d) litmus paper

Answer»

The indicator which produces a pink colour in an alkaline solution is :

(a) methyl orange

(b) turmeric paper

(c) phenolphthalein

(d) litmus paper

Discussion

5709.	33. Each mole of substance A (molar mass = 720) requires 10 moles of water for complete hydrolysis and gives B, C and D as the product in a molar ratio of 2:3:2. If molecular mass of B is 40 and its contributes 40% of the total mass of product then moles of C obtained will be:
Answer» 33. Each mole of substance A (molar mass = 720) requires 10 moles of water for complete hydrolysis and gives B, C and D as the product in a molar ratio of 2:3:2. If molecular mass of B is 40 and its contributes 40% of the total mass of product then moles of C obtained will be:

Discussion

5710.	ntat 100 degree centigrade the Kw of water is 55 times its value at 25 degree centigrade. what will be the PH of neutral solution (log55=1.74)?n
Answer» ntat 100 degree centigrade the Kw of water is 55 times its value at 25 degree centigrade. what will be the PH of neutral solution (log55=1.74)?n

Discussion

5711.	The pH values of distilled water, fruit juice and sodium bicarbonate were measured using pH papers. What is the correct decreasing order of pH values?
Answer» The pH values of distilled water, fruit juice and sodium bicarbonate were measured using pH papers. What is the correct decreasing order of pH values?

Discussion

5712.	Which of the following factors don't affect the process of electrolysis? Type in the appropriate number here. ___ 1. Concentration of the electrolyte 2. Galvanometer 3. Size of the electrode 4. Nature of the metal used 5. Current 6. Voltage
Answer» Which of the following factors don't affect the process of electrolysis? Type in the appropriate number here. ___ 1. Concentration of the electrolyte 2. Galvanometer 3. Size of the electrode 4. Nature of the metal used 5. Current 6. Voltage

Discussion

5713.	What is the Number of atoms in 0.6-mole atoms of nitrogen?
Answer» What is the Number of atoms in 0.6-mole atoms of nitrogen?

Discussion

5714.	Why Lawrencium(Lr) and Thorium(Th) not considered as elements of d block if last electron enters in to penultimate shell of valence shell?
Answer» Why Lawrencium(Lr) and Thorium(Th) not considered as elements of d block if last electron enters in to penultimate shell of valence shell?

Discussion

5715.	explain copper extraction
Answer» explain copper extraction

Discussion

5716.	What is an Allotrope?
Answer» What is an Allotrope?

Discussion

5717.	Calculate the mass percent of different elements in sodium sulphate Na2SO4?
Answer» Calculate the mass percent of different elements in sodium sulphate $N a_{2} S O_{4}$ ?

Discussion

5718.	How to determine when to use x=Asin(wt) and x=Acos(wt) while solving sums
Answer» How to determine when to use x=Asin(wt) and x=Acos(wt) while solving sums

Discussion

5719.	PVC is used to coat wires used in home wiring. Which property is responsible for it?
Answer» PVC is used to coat wires used in home wiring. Which property is responsible for it?

Discussion

5720.	Question 52 A 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

5721.	A first-aid manual suggests that vinegar should be used to treat wasp stings and baking soda for bee stings. What does this information tell you about the chemical nature of : (a) wasp stings ? (b) bee stings ?
Answer» A first-aid manual suggests that vinegar should be used to treat wasp stings and baking soda for bee stings. What does this information tell you about the chemical nature of : (a) wasp stings ? (b) bee stings ?

5721.

A first-aid manual suggests that vinegar should be used to treat wasp stings and baking soda for bee stings. What does this information tell you about the chemical nature of : (a) wasp stings ? (b) bee stings ?

Answer»

A first-aid manual suggests that vinegar should be used to treat wasp stings and baking soda for bee stings.

What does this information tell you about the chemical nature of :

(a) wasp stings ?

(b) bee stings ?

Discussion

5722.	Which of the following factors does economics of extraction depends on?
Answer» Which of the following factors does economics of extraction depends on?

Discussion

5723.	How can we distinguish between alcohol and carboxylic acid by alkaline KMnO4 test?
Answer» How can we distinguish between alcohol and carboxylic acid by alkaline $K M n O_{4}$ test?

Discussion

5724.	In the commercial electrochemical process for Aluminium extraction, the electrolyte used is:
Answer» In the commercial electrochemical process for Aluminium extraction, the electrolyte used is:

Discussion

5725.	2. Which of the following has maximum number of atoms?a) 6g of C b) 2g of H2 c) 12g of Mg d) 30g of Ca
Answer» 2. Which of the following has maximum number of atoms? a) 6g of C b) 2g of H2 c) 12g of Mg d) 30g of Ca

Discussion

5726.	The total number of atoms of all elements present in 1 mole of ammonium dichromate is
Answer» The total number of atoms of all elements present in 1 mole of ammonium dichromate is

Discussion

5727.	Why the first I.P. of Na same as the electron affinity of Na+ ion?
Answer» Why the first I.P. of Na same as the electron affinity of Na+ ion?

Discussion

5728.	How will you prepare hydrochloric acid in laboratory?OrDescribe briefly the method employed to dissolve hydrogen chloride gas in water as it is prepared. What is the purpose of funnel while preparing hydrochloric acid from HCl gas?
Answer» How will you prepare hydrochloric acid in laboratory? Or Describe briefly the method employed to dissolve hydrogen chloride gas in water as it is prepared. What is the purpose of funnel while preparing hydrochloric acid from HCl gas?

5728.

How will you prepare hydrochloric acid in laboratory?OrDescribe briefly the method employed to dissolve hydrogen chloride gas in water as it is prepared. What is the purpose of funnel while preparing hydrochloric acid from HCl gas?

Answer»

How will you prepare hydrochloric acid in laboratory?

Or

Describe briefly the method employed to dissolve hydrogen chloride gas in water as it is prepared. What is the purpose of funnel while preparing hydrochloric acid from HCl gas?

Discussion

5729.	Total number of atoms in the molecule CuSO4.5H2O is
Answer» Total number of atoms in the molecule $C u S O_{4} .5 H_{2} O$ is

Discussion

5730.	hybridization of carbon in urea
Answer» hybridization of carbon in urea

Discussion

5731.	Pinky mixed acetic acid with water. She will observe the solution formed as:
Answer» Pinky mixed acetic acid with water. She will observe the solution formed as:

Discussion

5732.	A gas mixture contains 50% helium and 50% methane by volume. What is the percent of weight of methane in mixture
Answer» A gas mixture contains 50% helium and 50% methane by volume. What is the percent of weight of methane in mixture

Discussion

5733.	Which elements are called bridge elements
Answer» Which elements are called bridge elements

Discussion

5734.	A student went to study a local pond. In one part of the pond, she noticed tadpoles scraping at some pondweed. In another part, she saw a water beetle holding a tadpole in its jaws. (a) Construct a food chain for the pond. (b) How many links are there in this chain?
Answer» A student went to study a local pond. In one part of the pond, she noticed tadpoles scraping at some pondweed. In another part, she saw a water beetle holding a tadpole in its jaws. (a) Construct a food chain for the pond. (b) How many links are there in this chain?

5734.

A student went to study a local pond. In one part of the pond, she noticed tadpoles scraping at some pondweed. In another part, she saw a water beetle holding a tadpole in its jaws. (a) Construct a food chain for the pond. (b) How many links are there in this chain?

Answer»

A student went to study a local pond. In one part of the pond, she noticed tadpoles scraping at some pondweed. In another part, she saw a water beetle holding a tadpole in its jaws.

(a) Construct a food chain for the pond.

(b) How many links are there in this chain?

Discussion

5735.	Which of the following elements are similar in chemical properties?
Answer» Which of the following elements are similar in chemical properties?

5735.

Which of the following elements are similar in chemical properties?

Answer»

Which of the following elements are similar in chemical properties?

Discussion

5736.	Define or explain the term: Electrolysis.
Answer» Define or explain the term: Electrolysis.

Discussion

5737.	ntThe mass of carbon present in 0.1 mol of sodium ferricyanide is equal to :n ntA) mass of C present in 0.6 g-molecule of CO2n ntB) mass of magnesium in 0.3 mol of MgSO4n ntC) mass of C in 0.05 mol of sucrosen ntD) all of thesen
Answer» ntThe mass of carbon present in 0.1 mol of sodium ferricyanide is equal to :n ntA) mass of C present in 0.6 g-molecule of CO2n ntB) mass of magnesium in 0.3 mol of MgSO4n ntC) mass of C in 0.05 mol of sucrosen ntD) all of thesen

Discussion

5738.	When one litre of a saturated solution of PbCl2 (molar mass = 278 g/mol) is evaporated, the residue is found to weigh 2.78 g. If Ksp of PbCl2 is represented as y×10–6, then find the value of y.
Answer» When one litre of a saturated solution of $P b C l_{2}$ (molar mass = $278 g/mol$ ) is evaporated, the residue is found to weigh $2.78 g$ . If $K_{s p}$ of $P b C l_{2}$ is represented as $y \times 10^{- 6}$ , then find the value of $y$ .

Discussion

5739.	Which of the following reaction(s) is/are known as esterification?
Answer» Which of the following reaction(s) is/are known as esterification?

Discussion

5740.	What is homologous series? Explain with examples. What are the characteristics of homologous series?
Answer» What is homologous series? Explain with examples. What are the characteristics of homologous series?

Discussion

5741.	Write equations to show what happens when ethyne gas reacts with(i) bromine water(ii) excess of hydrochloric acid.
Answer» Write equations to show what happens when ethyne gas reacts with (i) bromine water (ii) excess of hydrochloric acid.

Discussion

5742.	1 mole of a gas having γ=7÷5 is mixed with of a g as having γ=4÷3 what will be the γ for the mixtu emixtur
Answer» 1 mole of a gas having γ=7÷5 is mixed with of a g as having γ=4÷3 what will be the γ for the mixtu emixtur

Discussion

5743.	Explanation of graphs of exothermic and endothermic reactions
Answer» Explanation of graphs of exothermic and endothermic reactions

Discussion

5744.	What is incomplete dominance
Answer» What is incomplete dominance

Discussion

5745.	How is ethene prepared by : (a) dehydrohalogenation reaction? (b) dehydration reaction? Give equations and name the products formed.
Answer» How is ethene prepared by : (a) dehydrohalogenation reaction? (b) dehydration reaction? Give equations and name the products formed.

Discussion

5746.	The weiggt of silver displaced by quantiry of electericitywhih displaces5600ml pf O2 atstp will be how to fin equivalent weoght hher
Answer» The weiggt of silver displaced by quantiry of electericitywhih displaces5600ml pf O2 atstp will be how to fin equivalent weoght hher

Discussion

5747.	what is esterification reaction?
Answer» what is esterification reaction?

Discussion

5748.	Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner's triad.
Answer» Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner's triad.

Discussion

5749.	List inorganic acids.
Answer» List inorganic acids.

Discussion

5750.	67. Why is it so that the Zn electrode has Zn metal whereas the cu electrode has Cu^{2+} ions on their surface
Answer» 67. Why is it so that the Zn electrode has Zn metal whereas the cu electrode has Cu^{2+} ions on their surface

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following is an oxidising agent in 2Mg+O2(g)→2MgO(s)

State the first limitation of Mendeleev’s Periodic Table.

If the frequency of a certain wave is 20×104 s−1, what would be the energy of this wave?

Which of the following can be used as a solvent in dry cleaning?

does only carbon form covalent bond

Complete the following chemical equation: Ca(HCO3)2+HCl→

What is angular displacement formula

The indicator which produces a pink colour in an alkaline solution is : (a) methyl orange (b) turmeric paper (c) phenolphthalein (d) litmus paper

33. Each mole of substance A (molar mass = 720) requires 10 moles of water for complete hydrolysis and gives B, C and D as the product in a molar ratio of 2:3:2. If molecular mass of B is 40 and its contributes 40% of the total mass of product then moles of C obtained will be:

ntat 100 degree centigrade the Kw of water is 55 times its value at 25 degree centigrade. what will be the PH of neutral solution (log55=1.74)?n

The pH values of distilled water, fruit juice and sodium bicarbonate were measured using pH papers. What is the correct decreasing order of pH values?

Which of the following factors don't affect the process of electrolysis? Type in the appropriate number here. ___ 1. Concentration of the electrolyte 2. Galvanometer 3. Size of the electrode 4. Nature of the metal used 5. Current 6. Voltage

What is the Number of atoms in 0.6-mole atoms of nitrogen?

Why Lawrencium(Lr) and Thorium(Th) not considered as elements of d block if last electron enters in to penultimate shell of valence shell?

explain copper extraction

What is an Allotrope?

Calculate the mass percent of different elements in sodium sulphate Na2SO4?

How to determine when to use x=Asin(wt) and x=Acos(wt) while solving sums

PVC is used to coat wires used in home wiring. Which property is responsible for it?

A first-aid manual suggests that vinegar should be used to treat wasp stings and baking soda for bee stings. What does this information tell you about the chemical nature of : (a) wasp stings ? (b) bee stings ?

Which of the following factors does economics of extraction depends on?

How can we distinguish between alcohol and carboxylic acid by alkaline KMnO4 test?

In the commercial electrochemical process for Aluminium extraction, the electrolyte used is:

2. Which of the following has maximum number of atoms?a) 6g of C b) 2g of H2 c) 12g of Mg d) 30g of Ca

The total number of atoms of all elements present in 1 mole of ammonium dichromate is

Why the first I.P. of Na same as the electron affinity of Na+ ion?

How will you prepare hydrochloric acid in laboratory?OrDescribe briefly the method employed to dissolve hydrogen chloride gas in water as it is prepared. What is the purpose of funnel while preparing hydrochloric acid from HCl gas?

Total number of atoms in the molecule CuSO4.5H2O is

hybridization of carbon in urea

Pinky mixed acetic acid with water. She will observe the solution formed as:

A gas mixture contains 50% helium and 50% methane by volume. What is the percent of weight of methane in mixture

Which elements are called bridge elements

A student went to study a local pond. In one part of the pond, she noticed tadpoles scraping at some pondweed. In another part, she saw a water beetle holding a tadpole in its jaws. (a) Construct a food chain for the pond. (b) How many links are there in this chain?

Which of the following elements are similar in chemical properties?

Define or explain the term: Electrolysis.

ntThe mass of carbon present in 0.1 mol of sodium ferricyanide is equal to :n ntA) mass of C present in 0.6 g-molecule of CO2n ntB) mass of magnesium in 0.3 mol of MgSO4n ntC) mass of C in 0.05 mol of sucrosen ntD) all of thesen

When one litre of a saturated solution of PbCl2 (molar mass = 278 g/mol) is evaporated, the residue is found to weigh 2.78 g. If Ksp of PbCl2 is represented as y×10–6, then find the value of y.

Which of the following reaction(s) is/are known as esterification?

What is homologous series? Explain with examples. What are the characteristics of homologous series?

Write equations to show what happens when ethyne gas reacts with(i) bromine water(ii) excess of hydrochloric acid.

1 mole of a gas having γ=7÷5 is mixed with of a g as having γ=4÷3 what will be the γ for the mixtu emixtur

Explanation of graphs of exothermic and endothermic reactions

What is incomplete dominance

How is ethene prepared by : (a) dehydrohalogenation reaction? (b) dehydration reaction? Give equations and name the products formed.

The weiggt of silver displaced by quantiry of electericitywhih displaces5600ml pf O2 atstp will be how to fin equivalent weoght hher

what is esterification reaction?

Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner's triad.

List inorganic acids.

67. Why is it so that the Zn electrode has Zn metal whereas the cu electrode has Cu^{2+} ions on their surface