10223 + Interview Questions in Chemistry Page 78 InterviewSolution

3851.	if f is an even function defined on the interval (-5,5), then find four real values of x satisfying the equation f(x)=f((x+1)/(x+2))
Answer» if f is an even function defined on the interval (-5,5), then find four real values of x satisfying the equation f(x)=f((x+1)/(x+2))

Discussion

3852.	In the structure Which one is quaternary carbon atom?
Answer» In the structure Which one is quaternary carbon atom?

3852.

In the structure Which one is quaternary carbon atom?

Answer»

In the structure

Which one is quaternary carbon atom?

Discussion

3853.	आप इस निबंध को और क्या नाम देना चाहेंगे?
Answer» आप इस निबंध को और क्या नाम देना चाहेंगे?

Discussion

3854.	Avogadro number represents the number of atoms in
Answer» Avogadro number represents the number of atoms in

Discussion

3855.	Question 37A group of students took an old shoe box and covered it with a black paper from all sides. They fixed a source of light (a torch) at one end of the box by making a hole in it and made another hole on the other side to view the light. They placed a milk sample contained in a beaker/tumbler in the box as shown in the Figure. They were amazed to see that milk taken in the tumbler was illuminated. They tried the same activity by taking a salt solution but found that light simply passed through it?(a) Explain why the milk sample was illuminated? Name the phenomenon involved.(b) Same results were not observed with a salt solution. Explain.(c) Can you suggest two more solutions which would show the same effect as shown by the milk solution?
Answer» Question 37 A group of students took an old shoe box and covered it with a black paper from all sides. They fixed a source of light (a torch) at one end of the box by making a hole in it and made another hole on the other side to view the light. They placed a milk sample contained in a beaker/tumbler in the box as shown in the Figure. They were amazed to see that milk taken in the tumbler was illuminated. They tried the same activity by taking a salt solution but found that light simply passed through it? (a) Explain why the milk sample was illuminated? Name the phenomenon involved. (b) Same results were not observed with a salt solution. Explain. (c) Can you suggest two more solutions which would show the same effect as shown by the milk solution?

Discussion

3856.	Which elements are generally monoatomic?
Answer» Which elements are generally monoatomic?

Discussion

3857.	how does electrostatics plays an important role in photocopying?
Answer» how does electrostatics plays an important role in photocopying?

Discussion

3858.	Which of the following is the correct electronic configuration for magnesium?
Answer» Which of the following is the correct electronic configuration for magnesium?

Discussion

3859.	100 ml of o_2 gas diffuses in 10sec 100ml of gas x in t sec how to find gas x and time t?
Answer» 100 ml of o_2 gas diffuses in 10sec 100ml of gas x in t sec how to find gas x and time t?

Discussion

3860.	A gas is to be filled from a tank of capacity 10,000 litres into cylinders each having capacity of 10 litres. The condition of the gas in the tank is as follwos: (a) Pressure inside the tank is 800 mm of Hg. (b) temperature inside the tank is - 3∘C. When the cylinder is filled, the pressure gauge reads 400 mm of Hg and the temperature is 270 K. Find the number of cylinders required to fill the gas.
Answer» A gas is to be filled from a tank of capacity 10,000 litres into cylinders each having capacity of 10 litres. The condition of the gas in the tank is as follwos: (a) Pressure inside the tank is 800 mm of Hg. (b) temperature inside the tank is - $3^{\circ} C .$ When the cylinder is filled, the pressure gauge reads 400 mm of Hg and the temperature is 270 K. Find the number of cylinders required to fill the gas.

Discussion

3861.	ntwhen 1g of anhydrous oxalic acid is burnt at 25 degree centigrade , the amount of heat liberated is 2.835 KJ. deltaH combustion isn
Answer» ntwhen 1g of anhydrous oxalic acid is burnt at 25 degree centigrade , the amount of heat liberated is 2.835 KJ. deltaH combustion isn

Discussion

3862.	Which of the following are examples of combination reactions? (i) CaO+O2→2CaCO3 (ii) CaCO3→CaO+CO2 (iii) MgO+CO2→MgCO3 (iv) Fe+S→FeS (v) 2AgCl+sunlight→2Ag+Cl2 (vi) CH4+2O2→CO2+2H2O (vii) Na2O+H2O→2NaOH
Answer» Which of the following are examples of combination reactions? (i) $C a O + O_{2} \to 2 C a C O_{3}$ (ii) $C a C O_{3} \to C a O + C O_{2}$ (iii) $M g O + C O_{2} \to M g C O_{3}$ (iv) $F e + S \to F e S$ (v) $2 A g C l + s u n l i g h t \to 2 A g + C l_{2}$ (vi) $C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$ (vii) $N a_{2} O + H_{2} O \to 2 N a O H$

3862.

Which of the following are examples of combination reactions? (i) CaO+O2→2CaCO3 (ii) CaCO3→CaO+CO2 (iii) MgO+CO2→MgCO3 (iv) Fe+S→FeS (v) 2AgCl+sunlight→2Ag+Cl2 (vi) CH4+2O2→CO2+2H2O (vii) Na2O+H2O→2NaOH

Answer»

Which of the following are examples of combination reactions?

(i) $C a O + O_{2} \to 2 C a C O_{3}$

(ii) $C a C O_{3} \to C a O + C O_{2}$

(iii) $M g O + C O_{2} \to M g C O_{3}$

(iv) $F e + S \to F e S$

(v) $2 A g C l + s u n l i g h t \to 2 A g + C l_{2}$

(vi) $C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$

(vii) $N a_{2} O + H_{2} O \to 2 N a O H$

Discussion

3863.	Question 1If number of electrons in an atom is 8 and number of protons are also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atom?
Answer» Question 1 If number of electrons in an atom is 8 and number of protons are also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atom?

Discussion

3864.	Which of the following is a limitation of Rutherford’s experiment?
Answer» Which of the following is a limitation of Rutherford’s experiment?

Discussion

3865.	Calculate the molar mass of Nitric acid (HNO3).
Answer» Calculate the molar mass of Nitric acid ( $H N O_{3}$ ).

Discussion

3866.	Balance the following chemical equations and identify the type of chemical reaction.(a) Mg(s)+Cl2(g)→MgCl2(s)(b) HgO(s)Heat−−→Hg(l)+O2(g)(c) Na(s)+S(s)Fuse−−→Na2S(s)(d) TiCl4(l)+Mg(s)→Ti(s)+MgCl2(s)(e) CaO(s)+SiO2(s)→CaSiO3(s)(f) H2O2(l)UV−−→H2O(l)+O2(g)
Answer» Balance the following chemical equations and identify the type of chemical reaction. (a) $Mg(s) + {Cl}_{2} (g) \to {MgCl}_{2} (s)$ (b) $HgO(s) Heat - - \to Hg(l) + O_{2} (g)$ (c) $Na(s) + S(s) Fuse - - \to {Na}_{2} S(s)$ (d) ${TiCl}_{4} (l) + Mg(s) \to Ti(s) + {MgCl}_{2} (s)$ (e) $CaO(s) + {SiO}_{2} (s) \to {CaSiO}_{3} (s)$ (f) $H_{2} O_{2} (l) UV - - \to H_{2} O(l) + O_{2} (g)$

Discussion

3867.	Consider the given statements regarding radioactive decay and find the number of correct statement(s). S1: Molecules having n/p ratio greater than 1.5 undergo β+ decay.S2: Moleculaes having n/p ratio lesser than 1 undergo β− decay.S3: Neutrino is released during K capture.S4: K−electron capture can increase n/p ratio.S5: Mass of neutrino and neutron particle is equal.S6: Antineutrino is released during β+ decay.
Answer» Consider the given statements regarding radioactive decay and find the number of correct statement(s). $S 1 :$ Molecules having $n / p$ ratio greater than $1.5 u n d e r g o β^{+} d e c a y .$ $S 2 :$ Moleculaes having $n / p$ ratio lesser than $1 u n d e r g o β^{-} d e c a y$ . $S 3 :$ Neutrino is released during $K$ capture. $S 4 :$ $K - e l e c t r o n$ capture can increase $n / p$ ratio. $S 5 :$ Mass of neutrino and neutron particle is equal. $S 6 :$ Antineutrino is released during $β^{+} d e c a y .$

Discussion

3868.	The number of atoms present in 62 g of phosphorous if its gram atomic mass is 31 g is p ×1024. What is the value of p?1.204
Answer» The number of atoms present in 62 g of phosphorous if its gram atomic mass is 31 g is p $\times 10^{24}$ . What is the value of p? 1.204

Discussion

3869.	A proton and an α - particle (Helium nucleus) enters a uniform magnetic field with their direction of velocity perpendicular to the direction of magnetic field.(ii) If proton and α - particle enter the magnetic field, perpendicular to it with same velocity, then the ratio of the radii of curvature of proton and α - particle will be[1 Mark]
Answer» A proton and an $α$ - particle (Helium nucleus) enters a uniform magnetic field with their direction of velocity perpendicular to the direction of magnetic field. $(i i)$ If proton and $α$ - particle enter the magnetic field, perpendicular to it with same velocity, then the ratio of the radii of curvature of proton and $α$ - particle will be $[$ 1 Mark $]$

Discussion

3870.	On increasing the temperature the kinectic energy of particles
Answer» On increasing the temperature the kinectic energy of particles

Discussion

3871.	For the following two complexesA:[NiCl6]4− and [NiCl4]2− the ratio of CFSE will be nearly :
Answer» For the following two complexes $A : [N i C l_{6}]^{4 -} and [N i C l_{4}]^{2 -}$ the ratio of CFSE will be nearly :

Discussion

3872.	What is the difference between limiting reagent and excessive reagent?
Answer» What is the difference between limiting reagent and excessive reagent?

Discussion

3873.	The element name "oxygen" comes from the Greek word meaning:
Answer» The element name "oxygen" comes from the Greek word meaning:

Discussion

3874.	Arrange solid, liquid and gas on the basis of rate of diffusion in ascending order.
Answer» Arrange solid, liquid and gas on the basis of rate of diffusion in ascending order.

Discussion

3875.	Write the increasing order of basic character of MgO,SrO,K2O,NiO and Cs2O:
Answer» Write the increasing order of basic character of $M g O, S r O, K_{2} O, N i O$ and $C s_{2} O$ :

Discussion

3876.	a satellite of mass m0 is orbiting around the earth at a height h above the surface of the earth if the mass of the earth is M and its radius is R then angular momentum of satellite
Answer» a satellite of mass m0 is orbiting around the earth at a height h above the surface of the earth if the mass of the earth is M and its radius is R then angular momentum of satellite

Discussion

3877.	3. What is the definition of electrons , protons and neutrons ?
Answer» 3. What is the definition of electrons , protons and neutrons ?

Discussion

3878.	The number of electrons in the M-shell of the element with atomic number 24 is :- A. 24. B. 12. C. 8. D.13
Answer» The number of electrons in the M-shell of the element with atomic number 24 is :- A. 24. B. 12. C. 8. D.13

Discussion

3879.	For coagulation of 250 mL of Fe(OH)3 sol, 2 mL of 1 M Na2SO4 electrolyte is required. What is the coagulating value of Na2SO4 electrolyte?
Answer» For coagulation of $250 m L$ of $F e (O H)_{3}$ sol, $2 m L$ of $1 M N a_{2} S O_{4}$ electrolyte is required. What is the coagulating value of $N a_{2} S O_{4}$ electrolyte?

Discussion

3880.	68. Mole fraction of A vapours above solution in mixture of A and B where XA=0.4 pA=100mm and pB=200mm
Answer» 68. Mole fraction of A vapours above solution in mixture of A and B where XA=0.4 pA=100mm and pB=200mm

Discussion

3881.	To prepare 1 g of hydrogen molecules using hydrochloric acid how many grams of zinc should be taken? Zn +2HCl ------>ZnCl2 + H2
Answer» To prepare 1 g of hydrogen molecules using hydrochloric acid how many grams of zinc should be taken? Zn +2HCl ------>ZnCl2 + H2

3881.

To prepare 1 g of hydrogen molecules using hydrochloric acid how many grams of zinc should be taken? Zn +2HCl ------>ZnCl2 + H2

Answer»

To prepare 1 g of hydrogen molecules using hydrochloric acid how many grams of zinc should be taken?

Zn +2HCl ------>ZnCl2 + H2

Discussion

3882.	What are the postulates of Bohr's model of an atom?
Answer» What are the postulates of Bohr's model of an atom?

Discussion

3883.	(a) What are inert elements ? (b) Why do they exist as monoatoms in molecules ? (c) What are valence electrons ?
Answer» (a) What are inert elements ? (b) Why do they exist as monoatoms in molecules ? (c) What are valence electrons ?

3883.

(a) What are inert elements ? (b) Why do they exist as monoatoms in molecules ? (c) What are valence electrons ?

Answer»

(a) What are inert elements ?

(b) Why do they exist as monoatoms in molecules ?

(c) What are valence electrons ?

Discussion

3884.	Hot conc. H2SO4 acts as moderately strong oxidizing agent. It oxidizes both metals and non-metals. Which of the following elements is oxidized by conc. H2SO4 into two gaseous products?
Answer» Hot conc. $H_{2} S O_{4}$ acts as moderately strong oxidizing agent. It oxidizes both metals and non-metals. Which of the following elements is oxidized by conc. $H_{2} S O_{4}$ into two gaseous products?

Discussion

3885.	What is specific reaction rate?
Answer» What is specific reaction rate?

Discussion

3886.	Element X can donate 4 electrons, X would most likely belong to the same group in the periodic table as that of
Answer» Element X can donate 4 electrons, X would most likely belong to the same group in the periodic table as that of

Discussion

3887.	Spontaneous decay of unstable radio-isotopes is known as ___.
Answer» Spontaneous decay of unstable radio-isotopes is known as ___.

Discussion

3888.	During the alpha particle scattering experiment of Rutherford, he was expecting the positively charged particle to pass through the atom considering the pudding model of an atom by J.J Thompson. According to Thompson's model the atom is stuffed with positively charged dough, then why did Rutherford not expect the particle to bounce back or get deflected due to the +ve and +ve contact..... Please correct if any information stated is incorrect.
Answer» During the alpha particle scattering experiment of Rutherford, he was expecting the positively charged particle to pass through the atom considering the pudding model of an atom by J.J Thompson. According to Thompson's model the atom is stuffed with positively charged dough, then why did Rutherford not expect the particle to bounce back or get deflected due to the +^veand +^vecontact..... Please correct if any information stated is incorrect.

Discussion

3889.	निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − गांधीजी से मिलने से पहले महादेव भाई कहाँ नौकरी करते थे?
Answer» निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − गांधीजी से मिलने से पहले महादेव भाई कहाँ नौकरी करते थे?

3889.

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − गांधीजी से मिलने से पहले महादेव भाई कहाँ नौकरी करते थे?

Answer»

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए −

गांधीजी से मिलने से पहले महादेव भाई कहाँ नौकरी करते थे?

Discussion

3890.	How can you say that matter is made up of particles?
Answer» How can you say that matter is made up of particles?

Discussion

3891.	Explain what are multimolecular colloids, macromolecular colloids and associated colloids? Give the difference between them.
Answer» Explain what are multimolecular colloids, macromolecular colloids and associated colloids? Give the difference between them.

3891.

Explain what are multimolecular colloids, macromolecular colloids and associated colloids? Give the difference between them.

Answer»

Explain what are multimolecular colloids, macromolecular colloids and associated colloids?

Give the difference between them.

Discussion

3892.	Which is the hardest allotrope of carbon?
Answer» Which is the hardest allotrope of carbon?

Discussion

3893.	Which of the following is true about oxygen?
Answer» Which of the following is true about oxygen?

Discussion

3894.	Explain the reaction between magnesium and sulphuric acid.
Answer» Explain the reaction between magnesium and sulphuric acid.

Discussion

3895.	2mu is formula used in which cases??
Answer» 2mu is formula used in which cases??

Discussion

3896.	Which elements are naturally monoatomic?
Answer» Which elements are naturally monoatomic?

Discussion

3897.	Which one of the following is the most malleable metal?
Answer» Which one of the following is the most malleable metal?

Discussion

3898.	What are polar compounds? What is dipole? What is helix?
Answer» What are polar compounds? What is dipole? What is helix?

Discussion

3899.	which of the following aqueous solution has highest vapour pressure1. 0.02 M glucose at 20°C 2. 0.005 M MgCl2 at 15 °C3. 0.05 M Kcal at 60°C4. 0.005 M MgCl2 at 60°C
Answer» which of the following aqueous solution has highest vapour pressure 1. 0.02 M glucose at 20°C 2. 0.005 M MgCl2 at 15 °C 3. 0.05 M Kcal at 60°C 4. 0.005 M MgCl2 at 60°C

Discussion

3900.	A student purchases common salt from the market which is contaminated with Ammonium Chloride (NH4Cl ). Identify the technique that he should adopt to obtain pure NaCl.
Answer» A student purchases common salt from the market which is contaminated with Ammonium Chloride ( ${N H}_{4} C l$ ). Identify the technique that he should adopt to obtain pure NaCl.

Discussion

Explore topic-wise InterviewSolutions in .

if f is an even function defined on the interval (-5,5), then find four real values of x satisfying the equation f(x)=f((x+1)/(x+2))

In the structure Which one is quaternary carbon atom?

आप इस निबंध को और क्या नाम देना चाहेंगे?

Avogadro number represents the number of atoms in

Which elements are generally monoatomic?

how does electrostatics plays an important role in photocopying?

Which of the following is the correct electronic configuration for magnesium?

100 ml of o_2 gas diffuses in 10sec 100ml of gas x in t sec how to find gas x and time t?

ntwhen 1g of anhydrous oxalic acid is burnt at 25 degree centigrade , the amount of heat liberated is 2.835 KJ. deltaH combustion isn

Which of the following are examples of combination reactions? (i) CaO+O2→2CaCO3 (ii) CaCO3→CaO+CO2 (iii) MgO+CO2→MgCO3 (iv) Fe+S→FeS (v) 2AgCl+sunlight→2Ag+Cl2 (vi) CH4+2O2→CO2+2H2O (vii) Na2O+H2O→2NaOH

Question 1If number of electrons in an atom is 8 and number of protons are also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atom?

Which of the following is a limitation of Rutherford’s experiment?

Calculate the molar mass of Nitric acid (HNO3).

Balance the following chemical equations and identify the type of chemical reaction.(a) Mg(s)+Cl2(g)→MgCl2(s)(b) HgO(s)Heat−−→Hg(l)+O2(g)(c) Na(s)+S(s)Fuse−−→Na2S(s)(d) TiCl4(l)+Mg(s)→Ti(s)+MgCl2(s)(e) CaO(s)+SiO2(s)→CaSiO3(s)(f) H2O2(l)UV−−→H2O(l)+O2(g)

The number of atoms present in 62 g of phosphorous if its gram atomic mass is 31 g is p ×1024. What is the value of p?1.204

On increasing the temperature the kinectic energy of particles

For the following two complexesA:[NiCl6]4− and [NiCl4]2− the ratio of CFSE will be nearly :

What is the difference between limiting reagent and excessive reagent?

The element name "oxygen" comes from the Greek word meaning:

Arrange solid, liquid and gas on the basis of rate of diffusion in ascending order.

Write the increasing order of basic character of MgO,SrO,K2O,NiO and Cs2O:

a satellite of mass m0 is orbiting around the earth at a height h above the surface of the earth if the mass of the earth is M and its radius is R then angular momentum of satellite

3. What is the definition of electrons , protons and neutrons ?

The number of electrons in the M-shell of the element with atomic number 24 is :- A. 24. B. 12. C. 8. D.13

For coagulation of 250 mL of Fe(OH)3 sol, 2 mL of 1 M Na2SO4 electrolyte is required. What is the coagulating value of Na2SO4 electrolyte?

68. Mole fraction of A vapours above solution in mixture of A and B where XA=0.4 pA=100mm and pB=200mm

To prepare 1 g of hydrogen molecules using hydrochloric acid how many grams of zinc should be taken? Zn +2HCl ------&gt;ZnCl2 + H2

What are the postulates of Bohr's model of an atom?

(a) What are inert elements ? (b) Why do they exist as monoatoms in molecules ? (c) What are valence electrons ?

Hot conc. H2SO4 acts as moderately strong oxidizing agent. It oxidizes both metals and non-metals. Which of the following elements is oxidized by conc. H2SO4 into two gaseous products?

What is specific reaction rate?

Element X can donate 4 electrons, X would most likely belong to the same group in the periodic table as that of

Spontaneous decay of unstable radio-isotopes is known as ___.

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − गांधीजी से मिलने से पहले महादेव भाई कहाँ नौकरी करते थे?

How can you say that matter is made up of particles?

Explain what are multimolecular colloids, macromolecular colloids and associated colloids? Give the difference between them.

Which is the hardest allotrope of carbon?

Which of the following is true about oxygen?

Explain the reaction between magnesium and sulphuric acid.

2mu is formula used in which cases??

Which elements are naturally monoatomic?

Which one of the following is the most malleable metal?

What are polar compounds? What is dipole? What is helix?

which of the following aqueous solution has highest vapour pressure1. 0.02 M glucose at 20°C 2. 0.005 M MgCl2 at 15 °C3. 0.05 M Kcal at 60°C4. 0.005 M MgCl2 at 60°C

A student purchases common salt from the market which is contaminated with Ammonium Chloride (NH4Cl ). Identify the technique that he should adopt to obtain pure NaCl.

To prepare 1 g of hydrogen molecules using hydrochloric acid how many grams of zinc should be taken? Zn +2HCl ------>ZnCl2 + H2