10223 + Interview Questions in Chemistry Page 112 InterviewSolution

5551.	Why perforated cathode was taken only in anode Ray experiment but not in cathode Ray experiment?
Answer» Why perforated cathode was taken only in anode Ray experiment but not in cathode Ray experiment?

Discussion

5552.	Examine table sugar under a microscope and observe that it is made up of identical crystals. By placing it in a cup and melting in the microwave, it becomes a homogenous golden liquid. You read the ingredient list on the box and find that only one ingredient is listed: refined sucrose. The evidence you gathered indicate that table sugar is an example of a:
Answer» Examine table sugar under a microscope and observe that it is made up of identical crystals. By placing it in a cup and melting in the microwave, it becomes a homogenous golden liquid. You read the ingredient list on the box and find that only one ingredient is listed: refined sucrose. The evidence you gathered indicate that table sugar is an example of a:

Discussion

5553.	12.5g of impure sample of limestone on heating gives 4.4g of Co_2 Tnhen percantage purity ofCaCo_3 in the sample is (1)72 (2)80 (3)85(4)8
Answer» 12.5g of impure sample of limestone on heating gives 4.4g of Co_2 Tnhen percantage purity ofCaCo_3 in the sample is (1)72 (2)80 (3)85(4)8

Discussion

5554.	Avagadro constant and Dalton theory
Answer» Avagadro constant and Dalton theory

Discussion

5555.	Is cutting of trees a physical change or a chemical change
Answer» Is cutting of trees a physical change or a chemical change

Discussion

5556.	The anion formed during dissociation of the salt Na2SO4 has a charge of ___.-2
Answer» The anion formed during dissociation of the salt $N a_{2} S O_{4}$ has a charge of ___. -2

Discussion

5557.	Calculate the number of oxygen atoms in 0.10 mole of Na2 Co3 . 10H2 o
Answer» Calculate the number of oxygen atoms in 0.10 mole of Na₂ Co3 . 10H₂_o

Discussion

5558.	Which of the following can be present either as solid, liquid and gas?
Answer» Which of the following can be present either as solid, liquid and gas?

Discussion

5559.	Choose the option with correct dot structure.
Answer» Choose the option with correct dot structure.

Discussion

5560.	density of ice is less than water.explain
Answer» density of ice is less than water.explain

Discussion

5561.	Carbon has a valency of four. It is capable of forming single bonds with four other carbon atoms or atoms of some other monovalent element, etc. What is this property of carbon known as?
Answer» Carbon has a valency of four. It is capable of forming single bonds with four other carbon atoms or atoms of some other monovalent element, etc. What is this property of carbon known as?

Discussion

5562.	8 Water contains 88.90 percent oxygen and 11.10 percent hydrogen ammonia contains 82.35 percent nitrogen and 17.65 hydrogen and dinitrogen trioxide contains 63.15 percent oxygen and 36.85 percent nitrogen. Show that this data illustrates law of reciprocal proportions
Answer» 8 Water contains 88.90 percent oxygen and 11.10 percent hydrogen ammonia contains 82.35 percent nitrogen and 17.65 hydrogen and dinitrogen trioxide contains 63.15 percent oxygen and 36.85 percent nitrogen. Show that this data illustrates law of reciprocal proportions

Discussion

5563.	How did scientists have found that which component is coming out in a chemical reaction ?
Answer» How did scientists have found that which component is coming out in a chemical reaction ?

Discussion

5564.	How the oxidant state of MnO2 is +4? I have problem finding the oxidant state.
Answer» How the oxidant state of MnO2 is +4? I have problem finding the oxidant state.

Discussion

5565.	(NH4)+, (SO4)2− are examples of _________________.
Answer» $({N H}_{4})^{+}$ , $({S O}_{4})^{2 -}$ are examples of _________________.

Discussion

5566.	Which metal(s) out of the following reacts with very dilute nitric acid to produce nitric acid?
Answer» Which metal(s) out of the following reacts with very dilute nitric acid to produce nitric acid?

Discussion

5567.	Which of the following molecule has no dative bond1)CO2)CO3^2-3)SO4^2-4)all of these
Answer» Which of the following molecule has no dative bond 1)CO 2)CO3^2- 3)SO4^2- 4)all of these

Discussion

5568.	Question 2Why does an aqueous solution of acid conduct electricity?
Answer» Question 2 Why does an aqueous solution of acid conduct electricity?

Discussion

5569.	Choose the correct sequence of reagents for above conversion.
Answer» Choose the correct sequence of reagents for above conversion.

Discussion

5570.	Choose the correct pair of isotopes.
Answer» Choose the correct pair of isotopes.

Discussion

5571.	The number density of molecules of a gas depends on their distance r from the origin as, n(r)=n0eαr4. Then the total number of molecules is proportional to :
Answer» The number density of molecules of a gas depends on their distance $r$ from the origin as, $n (r) = n_{0} e^{α r^{4}}$ . Then the total number of molecules is proportional to :

Discussion

5572.	What are the limitations of E. Rutherford’s model of the atom?
Answer» What are the limitations of E. Rutherford’s model of the atom?

Discussion

5573.	Which of the following is correctly matched?
Answer» Which of the following is correctly matched?

Discussion

5574.	During the fractional distillation of Air ,which gas distilled first
Answer» During the fractional distillation of Air ,which gas distilled first

Discussion

5575.	Does soap solution react with sodium metal?
Answer» Does soap solution react with sodium metal?

Discussion

5576.	Newman projections P, Q, R and S are shown below:Which one of the following options represents identical molecules?
Answer» Newman projections P, Q, R and S are shown below: Which one of the following options represents identical molecules?

Discussion

5577.	The electrons in the outer most orbit of X, Y and Z atom are 7, 2 and 3 respectively. The valencies of the atoms are:
Answer» The electrons in the outer most orbit of X, Y and Z atom are 7, 2 and 3 respectively. The valencies of the atoms are:

Discussion

5578.	What is mean by concentration of solution
Answer» What is mean by concentration of solution

Discussion

5579.	carbon and iodine are non metals. How, I think they are lustrous
Answer» carbon and iodine are non metals. How, I think they are lustrous

Discussion

5580.	Two radioactive materials X1 and X2 have decay constants 11λ and λ respectively. If initially they have the same number of nuclei , then ratio of number of nuclei of X1 to X2 will be 1e2 after a time-
Answer» Two radioactive materials $X_{1}$ and $X_{2}$ have decay constants $11 λ$ and $λ$ respectively. If initially they have the same number of nuclei , then ratio of number of nuclei of $X_{1}$ to $X_{2}$ will be $\frac{1}{e^{2}}$ after a time-

Discussion

5581.	which one of the following gas is formed when copper is treated with concentrated nitric acid?
Answer» which one of the following gas is formed when copper is treated with concentrated nitric acid?

Discussion

5582.	19.What is the mass of 0.2 mole of oxygen atoms ? 0.5 mole of water molecules ?
Answer» 19.What is the mass of 0.2 mole of oxygen atoms ? 0.5 mole of water molecules ?

Discussion

5583.	HOW TO FIND NUMBER OF ATOMS
Answer» HOW TO FIND NUMBER OF ATOMS

Discussion

5584.	The basicity of H3PO2 is ___
Answer» The basicity of $H_{3} P O_{2}$ is ___

Discussion

5585.	Write a short note on pH.
Answer» Write a short note on pH.

Discussion

5586.

Match the extraction process listed in column I with metals listed in column II. Column IColumn IIA. Self reductionP. LeadB. Carbon reductionQ. SilverC. Complex formation and displacement by metalR. CopperD. Electrolytic reductionS. Sodium

Answer»

Match the extraction process listed in column I with metals listed in column II.

Column I	Column II
A. Self reduction	P. Lead
B. Carbon reduction	Q. Silver
C. Complex formation and displacement by metal	R. Copper
D. Electrolytic reduction	S. Sodium

Discussion

5587.	Which of the following will cause more severe burn?
Answer» Which of the following will cause more severe burn?

Discussion

5588.	Question 1 Metallic oxides of zinc, magnesium and copper were heated with the following metals. MetalZincMagnesiumCopperZinc oxide−−−Magnesium oxide−−−Copper oxide−−− In which cases will you find displacement reactions taking place?
Answer» Question 1 Metallic oxides of zinc, magnesium and copper were heated with the following metals. $\begin{matrix} M e t a l & Z i n c & M a g n e s i u m & C o p p e r Z i n c o x i d e & - & - & - M a g n e s i u m o x i d e & - & - & - C o p p e r o x i d e & - & - & - \end{matrix}$ In which cases will you find displacement reactions taking place?

Discussion

5589.	An element X has mass number 35 and the number of neutrons in its atom is 18.(a) To which group of the periodic table element X belongs?(b) To which period of the periodic table element X belongs?(c) What will be the formula of chloride of element X?
Answer» An element X has mass number 35 and the number of neutrons in its atom is 18. (a) To which group of the periodic table element X belongs? (b) To which period of the periodic table element X belongs? (c) What will be the formula of chloride of element X?

Discussion

5590.	why do metals like Mg, Zn etc form covalent compounds like in grignard's reagent, frankland reagent?
Answer» why do metals like Mg, Zn etc form covalent compounds like in grignard's reagent, frankland reagent?

Discussion

5591.	Which of the following can not change its magnetic moment on excitation?
Answer» Which of the following can not change its magnetic moment on excitation?

Discussion

5592.	1) Why Alkanes are called Saturated ?2) Why Alkenes and Alkyne are called Unsaturated ?
Answer» 1) Why Alkanes are called Saturated ? 2) Why Alkenes and Alkyne are called Unsaturated ?

Discussion

5593.	In Kjelalah's method the gas evolved from 1.325g of nitrogen fertilizer is passed into 50.00ml of 0.2030N H2SO4,25.32ml of 0.1980of N NaOH are required for titration of unused acid .Calculate the percentage of nitrogen
Answer» In Kjelalah's method the gas evolved from 1.325g of nitrogen fertilizer is passed into 50.00ml of 0.2030N H2SO4,25.32ml of 0.1980of N NaOH are required for titration of unused acid .Calculate the percentage of nitrogen

Discussion

5594.	what is mole fraction?
Answer» what is mole fraction?

Discussion

5595.	The atomic mass of germanium is 72.6 and its density is 5.47g cm−3. What is the atomic volume of germanium?
Answer» The atomic mass of germanium is 72.6 and its density is 5.47g $c m^{- 3}$ . What is the atomic volume of germanium?

Discussion

5596.	Explain the Law of reciprocal proportions.
Answer» Explain the Law of reciprocal proportions.

Discussion

5597.	निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए −लेखक ने संसार में किस प्रकार के सुख को दुर्लभ माना है?
Answer» निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − लेखक ने संसार में किस प्रकार के सुख को दुर्लभ माना है?

5597.

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए −लेखक ने संसार में किस प्रकार के सुख को दुर्लभ माना है?

Answer»

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए −

लेखक ने संसार में किस प्रकार के सुख को दुर्लभ माना है?

Discussion

5598.	Calculate the number of electrons present in 60 g of water.
Answer» Calculate the number of electrons present in 60 g of water.

Discussion

5599.	Molarity of 63% M/V nitric acid solution is (D=1.6 g/m)
Answer» Molarity of 63% M/V nitric acid solution is (D=1.6 g/m)

Discussion

5600.	10.Why the line spectra of atom of every element is unique?
Answer» 10.Why the line spectra of atom of every element is unique?

Discussion

Explore topic-wise InterviewSolutions in .

Why perforated cathode was taken only in anode Ray experiment but not in cathode Ray experiment?

12.5g of impure sample of limestone on heating gives 4.4g of Co_2 Tnhen percantage purity ofCaCo_3 in the sample is (1)72 (2)80 (3)85(4)8

Avagadro constant and Dalton theory

Is cutting of trees a physical change or a chemical change

The anion formed during dissociation of the salt Na2SO4 has a charge of ___.-2

Calculate the number of oxygen atoms in 0.10 mole of Na​​2​​​​ Co​​​​​3 . 10H2 ​​​​​​o

Which of the following can be present either as solid, liquid and gas?

Choose the option with correct dot structure.

density of ice is less than water.explain

Carbon has a valency of four. It is capable of forming single bonds with four other carbon atoms or atoms of some other monovalent element, etc. What is this property of carbon known as?

8 Water contains 88.90 percent oxygen and 11.10 percent hydrogen ammonia contains 82.35 percent nitrogen and 17.65 hydrogen and dinitrogen trioxide contains 63.15 percent oxygen and 36.85 percent nitrogen. Show that this data illustrates law of reciprocal proportions

How did scientists have found that which component is coming out in a chemical reaction ?

How the oxidant state of MnO2 is +4? I have problem finding the oxidant state.

(NH4)+, (SO4)2− are examples of _________________.

Which metal(s) out of the following reacts with very dilute nitric acid to produce nitric acid?

Which of the following molecule has no dative bond1)CO2)CO3^2-3)SO4^2-4)all of these

Question 2Why does an aqueous solution of acid conduct electricity?

Choose the correct sequence of reagents for above conversion.

Choose the correct pair of isotopes.

The number density of molecules of a gas depends on their distance r from the origin as, n(r)=n0eαr4. Then the total number of molecules is proportional to :

What are the limitations of E. Rutherford’s model of the atom?

Which of the following is correctly matched?

During the fractional distillation of Air ,which gas distilled first

Does soap solution react with sodium metal?

Newman projections P, Q, R and S are shown below:Which one of the following options represents identical molecules?

The electrons in the outer most orbit of X, Y and Z atom are 7, 2 and 3 respectively. The valencies of the atoms are:

What is mean by concentration of solution

carbon and iodine are non metals. How, I think they are lustrous

Two radioactive materials X1 and X2 have decay constants 11λ and λ respectively. If initially they have the same number of nuclei , then ratio of number of nuclei of X1 to X2 will be 1e2 after a time-

which one of the following gas is formed when copper is treated with concentrated nitric acid?

19.What is the mass of 0.2 mole of oxygen atoms ? 0.5 mole of water molecules ?

HOW TO FIND NUMBER OF ATOMS

The basicity of H3PO2 is ___

Write a short note on pH.

Match the extraction process listed in column I with metals listed in column II. Column IColumn IIA. Self reductionP. LeadB. Carbon reductionQ. SilverC. Complex formation and displacement by metalR. CopperD. Electrolytic reductionS. Sodium

Which of the following will cause more severe burn?

Question 1 Metallic oxides of zinc, magnesium and copper were heated with the following metals. MetalZincMagnesiumCopperZinc oxide−−−Magnesium oxide−−−Copper oxide−−− In which cases will you find displacement reactions taking place?

An element X has mass number 35 and the number of neutrons in its atom is 18.(a) To which group of the periodic table element X belongs?(b) To which period of the periodic table element X belongs?​(c) What will be the formula of chloride of element X?

why do metals like Mg, Zn etc form covalent compounds like in grignard's reagent, frankland reagent?

Which of the following can not change its magnetic moment on excitation?

1) Why Alkanes are called Saturated ?2) Why Alkenes and Alkyne are called Unsaturated ?

In Kjelalah's method the gas evolved from 1.325g of nitrogen fertilizer is passed into 50.00ml of 0.2030N H2SO4,25.32ml of 0.1980of N NaOH are required for titration of unused acid .Calculate the percentage of nitrogen

what is mole fraction?

The atomic mass of germanium is 72.6 and its density is 5.47g cm−3. What is the atomic volume of germanium?

Explain the Law of reciprocal proportions.

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए −लेखक ने संसार में किस प्रकार के सुख को दुर्लभ माना है?

Calculate the number of electrons present in 60 g of water.

Molarity of 63% M/V nitric acid solution is (D=1.6 g/m)

10.Why the line spectra of atom of every element is unique?

Calculate the number of oxygen atoms in 0.10 mole of Na2 Co3 . 10H2 o

An element X has mass number 35 and the number of neutrons in its atom is 18.(a) To which group of the periodic table element X belongs?(b) To which period of the periodic table element X belongs?(c) What will be the formula of chloride of element X?