15280 + Interview Questions in Chemistry Page 46 InterviewSolution

2251.	How does ethanol reacts with(a) metallic sodium(b) acetic acid(c) conc. H2SO4
Answer» How does ethanol reacts with (a) metallic sodium (b) acetic acid (c) conc. H₂SO₄

Discussion

2252.	What are the drawbacks of chemical equations?
Answer» What are the drawbacks of chemical equations?

Discussion

2253.	Determine the no. of molecules in a drop of water which weighs 0.09 g.
Answer» Determine the no. of molecules in a drop of water which weighs 0.09 g.

Discussion

2254.	What is the difference between radioactive & non-radioactive sugar ?
Answer» What is the difference between radioactive & non-radioactive sugar ?

Discussion

2255.	Write the products of electrolysis at anode and cathode for electrolysis of aqueous NaCl?
Answer» Write the products of electrolysis at anode and cathode for electrolysis of aqueous NaCl?

Discussion

2256.	A compound is found to contain 50.05 % sulphur and 49.95 % oxygen by weight. What is the empirical formula for this compound? The molecular weight for this compound is 64.07 g/mol. What is its molecular formula?
Answer» A compound is found to contain 50.05 % sulphur and 49.95 % oxygen by weight. What is the empirical formula for this compound? The molecular weight for this compound is 64.07 g/mol. What is its molecular formula?

Discussion

2257.	What are the raw materials required for making soap in a laboratory (or at home)?
Answer» What are the raw materials required for making soap in a laboratory (or at home)?

Discussion

2258.	An isotope of Ge7632 is :
Answer» An isotope of $G e_{32}^{76}$ is :

Discussion

2259.	What would you observe in the following case:Copper is heated with concentrated nitric acid in a hard glass test tube.
Answer» What would you observe in the following case: Copper is heated with concentrated nitric acid in a hard glass test tube.

Discussion

2260.	IUPAC Structure of Ethoxy Propane is wha
Answer» IUPAC Structure of Ethoxy Propane is wha

Discussion

2261.	The heats of combustion of carbon and carbon monoxide are −283.5 and −283.5 kJ mol−1 respectively. The heat of formation (in kJ) of carbon monoxide per mole is
Answer» The heats of combustion of carbon and carbon monoxide are $- 283.5 a n d - 283.5 k J m o l^{- 1}$ respectively. The heat of formation (in kJ) of carbon monoxide per mole is

Discussion

2262.	What happens when haloalkanes react with zinc and other metals
Answer» What happens when haloalkanes react with zinc and other metals

Discussion

2263.	Find the elements Which is the least metallic?
Answer» Find the elements Which is the least metallic?

Discussion

2264.	Different structures of acid anhydride C6H10O3
Answer» Different structures of acid anhydride C6H10O3

Discussion

2265.	Rate of reaction triples when its temperature change from 300 Kelvin to 320 Kelvin. Activation energy of such reaction will be (log3=0.4771)
Answer» Rate of reaction triples when its temperature change from 300 Kelvin to 320 Kelvin. Activation energy of such reaction will be (log3=0.4771)

Discussion

2266.	A compound 'X' on treatement with Br2/NaOH provided C3H9N, which gives positive carbylamine test. Compound 'X' is:
Answer» A compound ' $X$ ' on treatement with $B r_{2} / N a O H$ provided $C_{3} H_{9} N,$ which gives positive carbylamine test. Compound ' $X$ ' is:

Discussion

2267.	Which of the following is correct about fire? Fire is ____________.
Answer» Which of the following is correct about fire? Fire is ____________.

2267.

Which of the following is correct about fire? Fire is ____________.

Answer»

Which of the following is correct about fire?

Fire is ____________.

Discussion

2268.	Considering the Ellingham diagram, which of the following metals can be used to reduce alumina?
Answer» Considering the Ellingham diagram, which of the following metals can be used to reduce alumina?

Discussion

2269.	How does aluminium react with the following: (a) Air, (b) Water, (c) Acid, (d) Base.
Answer» How does aluminium react with the following: (a) Air, (b) Water, (c) Acid, (d) Base.

2269.

How does aluminium react with the following: (a) Air, (b) Water, (c) Acid, (d) Base.

Answer»

How does aluminium react with the following:

(a) Air, (b) Water,

(c) Acid, (d) Base.

Discussion

2270.	A non-metal oxide was dissolved in water and then tested with both blue and red litmus papers. What will happen to the two litmus papers?
Answer» A non-metal oxide was dissolved in water and then tested with both blue and red litmus papers. What will happen to the two litmus papers?

Discussion

2271.	what is plaster of paris ? how is it obtained from gypsum ?
Answer» what is plaster of paris ? how is it obtained from gypsum ?

Discussion

2272.	0.15 g of a substance dissolved in 15 g of a solvent is boiled at a temperature higher by 0.216∘ C than that of the pure solvent. Find out the molecular weight of the substance (Kf for solvent is 2.16 K kg m−1)
Answer» $0.15 g$ of a substance dissolved in $15 g$ of a solvent is boiled at a temperature higher by ${0.216}^{\circ} C$ than that of the pure solvent. Find out the molecular weight of the substance ( $K_{f}$ for solvent is $2.16 {K kg m}^{- 1}$ )

Discussion

2273.	How many structural isomers can you draw for pentane?
Answer» How many structural isomers can you draw for pentane?

Discussion

2274.	Which hydrocarbons are used as solvents?
Answer» Which hydrocarbons are used as solvents?

Discussion

2275.	Calculate the number of (a) Oxygen atoms in 0.10 mole of Na2CO3. 10H2O (b) gram atoms in 4.6 gram of sodium.
Answer» Calculate the number of (a) Oxygen atoms in 0.10 mole of $N a_{2} C O_{3}$ . $10 H_{2} O$ (b) gram atoms in 4.6 gram of sodium.

Discussion

2276.	Reduction potential of four elements P, Q, R, Sis-2.90, 0.34, 1.20 and -0.76 and Reactivitydecreases in the order(a) P>Q>R>S(c)R> Q> S> P(b) Q> P> R>S(d) P>S>a>R
Answer» Reduction potential of four elements P, Q, R, Sis-2.90, 0.34, 1.20 and -0.76 and Reactivitydecreases in the order(a) P>Q>R>S(c)R> Q> S> P(b) Q> P> R>S(d) P>S>a>R

Discussion

2277.	Most of the water surface of a lake is covered with algae. This alga is part of the food chain which also includes small fish, bird, larvae and big fish. Which of the following will obtain the maximum energy? (a) big fish (b) bird (c) larvae (d) small fish
Answer» Most of the water surface of a lake is covered with algae. This alga is part of the food chain which also includes small fish, bird, larvae and big fish. Which of the following will obtain the maximum energy? (a) big fish (b) bird (c) larvae (d) small fish

2277.

Most of the water surface of a lake is covered with algae. This alga is part of the food chain which also includes small fish, bird, larvae and big fish. Which of the following will obtain the maximum energy? (a) big fish (b) bird (c) larvae (d) small fish

Answer»

Most of the water surface of a lake is covered with algae. This alga is part of the food chain which also includes small fish, bird, larvae and big fish. Which of the following will obtain the maximum energy?

(a) big fish (b) bird (c) larvae (d) small fish

Discussion

2278.	Na2CO3 can be manufactured by Solvay’s process but K2CO3 cannot be prepared because
Answer» $N a_{2} C O_{3}$ can be manufactured by Solvay’s process but $K_{2} C O_{3}$ cannot be prepared because

Discussion

2279.	The correct combination of names for isomeric alcohols with molecular formula C4H10O is/are:
Answer» The correct combination of names for isomeric alcohols with molecular formula $C_{4} H_{10} O$ is/are:

Discussion

2280.	how many atoms of H and S are contained in 0.40 mole of H2S
Answer» how many atoms of H and S are contained in 0.40 mole of H2S

Discussion

2281.	Balance by ion electron method:N2H4 + ClO3- = NO + Cl-
Answer» Balance by ion electron method: N2H4 + ClO3- = NO + Cl-

Discussion

2282.	what is the ratio of average K.E. of one molecule of diatomic (rigid) and diatomic(elastic) at cons†an t temperature. what is differance between diatomic(rigid) and diatomic(elastic)
Answer» what is the ratio of average K.E. of one molecule of diatomic (rigid) and diatomic(elastic) at cons†an t temperature. what is differance between diatomic(rigid) and diatomic(elastic)

Discussion

2283.	What are the products obtained by heating ethane in:(a) excess of air(b) absence of air(c) air in presence of copper and 120 atm pressure.(d) air with molybdenum oxide at 100 atm pressure.
Answer» What are the products obtained by heating ethane in: (a) excess of air (b) absence of air (c) air in presence of copper and 120 atm pressure. (d) air with molybdenum oxide at 100 atm pressure.

Discussion

2284.	How will you identify?(a) Chloride ion(b) Chlorine gas(c) Sulphur dioxide gas(d) A soluble carbonate(e) An amphoteric hydroxide
Answer» How will you identify? (a) Chloride ion (b) Chlorine gas (c) Sulphur dioxide gas (d) A soluble carbonate (e) An amphoteric hydroxide

Discussion

2285.	What is effective nuclear charge and shielding effect?
Answer» What is effective nuclear charge and shielding effect?

Discussion

2286.	Which of the following mixtures of gases at room temperature follow Dalton's law of partial pressure.
Answer» Which of the following mixtures of gases at room temperature follow Dalton's law of partial pressure.

Discussion

2287.	Which of the following is correct regarding pH?
Answer» Which of the following is correct regarding pH?

Discussion

2288.	0.1 M solution is present in a conductivity cell with electrode of 100cm2 area placed 1 cm apart and resistance observed was 5×103 ohm. What is the molar conductivity of this solution?
Answer» $0.1 M$ solution is present in a conductivity cell with electrode of $100 c m^{2}$ area placed $1 c m$ apart and resistance observed was $5 \times 10^{3} o h m$ . What is the molar conductivity of this solution?

Discussion

2289.	Describe what you see when concentrated nitric acid is added to copper.
Answer» Describe what you see when concentrated nitric acid is added to copper.

Discussion

2290.	Metallurgy is a process of extracting:
Answer» Metallurgy is a process of extracting:

Discussion

2291.	The density of gas is 1.78g/l at stp the weight of one mole of gas is ___
Answer» The density of gas is 1.78g/l at stp the weight of one mole of gas is ___

Discussion

2292.	Choose the correct answer:During the electrolysis of molten lead bromide, which of the following takes place?(a) Bromine is released at the cathode(b) Lead is deposited at the anode(c) Bromine ions gain electrons(d) Lead is deposited at the cathode
Answer» Choose the correct answer: During the electrolysis of molten lead bromide, which of the following takes place? (a) Bromine is released at the cathode (b) Lead is deposited at the anode (c) Bromine ions gain electrons (d) Lead is deposited at the cathode

Discussion

2293.	Arrange the following in order of increasing radii : (a) Cl−,Cl (b) Mg2+,Mg,Mg+ (c) N, O, P
Answer» Arrange the following in order of increasing radii : (a) $C l^{-}, C l$ (b) $M g^{2 +}, M g, M g^{+}$ (c) N, O, P

2293.

Arrange the following in order of increasing radii : (a) Cl−,Cl (b) Mg2+,Mg,Mg+ (c) N, O, P

Answer»

Arrange the following in order of increasing radii :

(a) $C l^{-}, C l$ (b) $M g^{2 +}, M g, M g^{+}$ (c) N, O, P

Discussion

2294.	Question 11 Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is (a) 1:1 (b) 2:1 (c) 4:1 (d) 1:2
Answer» Question 11 Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is (a) 1:1 (b) 2:1 (c) 4:1 (d) 1:2

Discussion

2295.	Why metal oxide are bases without carrying hydroxide ions
Answer» Why metal oxide are bases without carrying hydroxide ions

Discussion

2296.	Electromagnetic radiation of wavelength 663 nm is just sufficient to ionize the atom of metal A. The ionization energy of metal A in kJ mol−1 is.(Rounded off to the nearest integer)[h=6.63×10−34 Js, c=3.00×108 ms−1, NA=6.02×1023 mol−1]
Answer» Electromagnetic radiation of wavelength 663 nm is just sufficient to ionize the atom of metal A. The ionization energy of metal A in kJ mol $^{- 1}$ is. (Rounded off to the nearest integer) $[h = 6.63 \times 10^{- 34} Js, c = 3.00 \times 10^{8} {ms}^{- 1}, N_{A} = 6.02 \times 10^{23} {mol}^{- 1}]$

Discussion

2297.	41.In the chemical rection K2 Cr2 O7 + xH2 SO4 +ySO2 ----->K2 SO4 + Cr(SO4)+zH2O values of x,y and z are
Answer» 41.In the chemical rection K2 Cr2 O7 + xH2 SO4 +ySO2 ----->K2 SO4 + Cr(SO4)+zH2O values of x,y and z are

Discussion

2298.	Why zinc has more atomic radius than copper
Answer» Why zinc has more atomic radius than copper

Discussion

2299.	Show Lewis dot structure for chlorine molecules.
Answer» Show Lewis dot structure for chlorine molecules.

Discussion

2300.	Correct the sentence by adding word(s).The electrolysis of lead bromide liberates lead and bromine.
Answer» Correct the sentence by adding word(s). The electrolysis of lead bromide liberates lead and bromine.

Discussion

Explore topic-wise InterviewSolutions in .

How does ethanol reacts with(a) metallic sodium(b) acetic acid(c) conc. H2SO4

What are the drawbacks of chemical equations?

Determine the no. of molecules in a drop of water which weighs 0.09 g.

What is the difference between radioactive & non-radioactive sugar ?

Write the products of electrolysis at anode and cathode for electrolysis of aqueous NaCl?

A compound is found to contain 50.05 % sulphur and 49.95 % oxygen by weight. What is the empirical formula for this compound? The molecular weight for this compound is 64.07 g/mol. What is its molecular formula?

What are the raw materials required for making soap in a laboratory (or at home)?

An isotope of Ge7632 is :

What would you observe in the following case:Copper is heated with concentrated nitric acid in a hard glass test tube.

IUPAC Structure of Ethoxy Propane is wha

The heats of combustion of carbon and carbon monoxide are −283.5 and −283.5 kJ mol−1 respectively. The heat of formation (in kJ) of carbon monoxide per mole is

What happens when haloalkanes react with zinc and other metals

Find the elements Which is the least metallic?

Different structures of acid anhydride C6H10O3

Rate of reaction triples when its temperature change from 300 Kelvin to 320 Kelvin. Activation energy of such reaction will be (log3=0.4771)

A compound 'X' on treatement with Br2/NaOH provided C3H9N, which gives positive carbylamine test. Compound 'X' is:

Which of the following is correct about fire? Fire is ____________.

Considering the Ellingham diagram, which of the following metals can be used to reduce alumina?

How does aluminium react with the following: (a) Air, (b) Water, (c) Acid, (d) Base.

A non-metal oxide was dissolved in water and then tested with both blue and red litmus papers. What will happen to the two litmus papers?

what is plaster of paris ? how is it obtained from gypsum ?

0.15 g of a substance dissolved in 15 g of a solvent is boiled at a temperature higher by 0.216∘ C than that of the pure solvent. Find out the molecular weight of the substance (Kf for solvent is 2.16 K kg m−1)

How many structural isomers can you draw for pentane?

Which hydrocarbons are used as solvents?

Calculate the number of (a) Oxygen atoms in 0.10 mole of Na2CO3. 10H2O (b) gram atoms in 4.6 gram of sodium.

Reduction potential of four elements P, Q, R, Sis-2.90, 0.34, 1.20 and -0.76 and Reactivitydecreases in the order(a) P>Q>R>S(c)R> Q> S> P(b) Q> P> R>S(d) P>S>a>R

Most of the water surface of a lake is covered with algae. This alga is part of the food chain which also includes small fish, bird, larvae and big fish. Which of the following will obtain the maximum energy? (a) big fish (b) bird (c) larvae (d) small fish

Na2CO3 can be manufactured by Solvay’s process but K2CO3 cannot be prepared because

The correct combination of names for isomeric alcohols with molecular formula C4H10O is/are:

how many atoms of H and S are contained in 0.40 mole of H2S

Balance by ion electron method:N2H4 + ClO3- = NO + Cl-

what is the ratio of average K.E. of one molecule of diatomic (rigid) and diatomic(elastic) at cons†an t temperature. what is differance between diatomic(rigid) and diatomic(elastic)

What are the products obtained by heating ethane in:(a) excess of air(b) absence of air(c) air in presence of copper and 120 atm pressure.(d) air with molybdenum oxide at 100 atm pressure.

How will you identify?(a) Chloride ion(b) Chlorine gas(c) Sulphur dioxide gas(d) A soluble carbonate(e) An amphoteric hydroxide

What is effective nuclear charge and shielding effect?

Which of the following mixtures of gases at room temperature follow Dalton's law of partial pressure.

Which of the following is correct regarding pH?

0.1 M solution is present in a conductivity cell with electrode of 100cm2 area placed 1 cm apart and resistance observed was 5×103 ohm. What is the molar conductivity of this solution?

Describe what you see when concentrated nitric acid is added to copper.

Metallurgy is a process of extracting:

The density of gas is 1.78g/l at stp the weight of one mole of gas is ___ ​​

Choose the correct answer:During the electrolysis of molten lead bromide, which of the following takes place?(a) Bromine is released at the cathode(b) Lead is deposited at the anode(c) Bromine ions gain electrons(d) Lead is deposited at the cathode

Arrange the following in order of increasing radii : (a) Cl−,Cl (b) Mg2+,Mg,Mg+ (c) N, O, P

Question 11 Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is (a) 1:1 (b) 2:1 (c) 4:1 (d) 1:2

Why metal oxide are bases without carrying hydroxide ions

Electromagnetic radiation of wavelength 663 nm is just sufficient to ionize the atom of metal A. The ionization energy of metal A in kJ mol−1 is.(Rounded off to the nearest integer)[h=6.63×10−34 Js, c=3.00×108 ms−1, NA=6.02×1023 mol−1]

41.In the chemical rection K2 Cr2 O7 + xH2 SO4 +ySO2 ----->K2 SO4 + Cr(SO4)+zH2O values of x,y and z are

Why zinc has more atomic radius than copper

Show Lewis dot structure for chlorine molecules.

Correct the sentence by adding word(s).The electrolysis of lead bromide liberates lead and bromine.

The density of gas is 1.78g/l at stp the weight of one mole of gas is ___