10223 + Interview Questions in Chemistry Page 43 InterviewSolution

2101.	We all love the fizz sound that comes from the bubbles which come out of a soft drink bottle but what gas are those bubbles made of?
Answer» We all love the fizz sound that comes from the bubbles which come out of a soft drink bottle but what gas are those bubbles made of?

Discussion

2102.	In PO43- ion the average charge on the oxygen atoms is
Answer» In PO43- ion the average charge on the oxygen atoms is

Discussion

2103.	The number of moles of Fe2O3 formed when 0.5 moles of O2 and 0.5 moles of Fe are allowed to react are
Answer» The number of moles of $F e_{2} O_{3}$ formed when $0.5 m o l e s$ of $O_{2}$ and $0.5 m o l e s$ of $F e$ are allowed to react are

Discussion

2104.	Which one of the following sets of phenomena would increase on raising the temperature?(a) Diffusion, evaporation, compression of gases(b) Evaporation, compression of gases, solubility(c) Evaporation, diffusion, expansion of gases(d) Evaporation, solubility, diffusion, compression of gases
Answer» Which one of the following sets of phenomena would increase on raising the temperature? (a) Diffusion, evaporation, compression of gases (b) Evaporation, compression of gases, solubility (c) Evaporation, diffusion, expansion of gases (d) Evaporation, solubility, diffusion, compression of gases

Discussion

2105.	equal maeses of h2 ,o2 and helium are taken in closed container at stp ratio of moles of gases
Answer» equal maeses of h2 ,o2 and helium are taken in closed container at stp ratio of moles of gases

Discussion

2106.	Which of the following reaction produces a base?
Answer» Which of the following reaction produces a base?

Discussion

2107.	In the reaction, C2O2−4 → CO2 , the total number of electrons lost per mole of C2O−24 is
Answer» In the reaction, $C_{2} O_{4}^{2 -}$ $\to$ $C O_{2}$ , the total number of electrons lost per mole of $C_{2} O_{4}^{- 2}$ is

Discussion

2108.	How does an electron differ from a neutron?
Answer» How does an electron differ from a neutron?

Discussion

2109.	Question 22Why did Rutherford select a gold foil in his alpha-ray scattering experiment?
Answer» Question 22 Why did Rutherford select a gold foil in his alpha-ray scattering experiment?

Discussion

2110.	Number of sp hybridized carbon atoms in the following compound are CH_{3 }-CH=C=C=CH-C≡ CH Options: a) 2 b) 4 c) 5 d) 6
Answer» Number of sp hybridized carbon atoms in the following compound are CH_{3 }-CH=C=C=CH-C≡ CH Options: a) 2 b) 4 c) 5 d) 6

Discussion

2111.	Finely divided metals and metal oxides on reaction with hydrogen peroxide liberate __ gas.
Answer» Finely divided metals and metal oxides on reaction with hydrogen peroxide liberate __ gas.

Discussion

2112.	54.Find number of oxygen atoms in 100 mg of caco3{atomic mass of ca=40u,c=12u,o=16u
Answer» 54.Find number of oxygen atoms in 100 mg of caco3{atomic mass of ca=40u,c=12u,o=16u

Discussion

2113.	Pick the odd one out.
Answer» Pick the odd one out.

Discussion

2114.	Show the electron dot structure of KCN in which both ionic and covalent bond exists.
Answer» Show the electron dot structure of KCN in which both ionic and covalent bond exists.

Discussion

2115.	why is one end of polysaccchride reducing and other end non reducing
Answer» why is one end of polysaccchride reducing and other end non reducing

Discussion

2116.	What type of mixture is air?
Answer» What type of mixture is air?

Discussion

2117.	In the HCl molecule, separation between the nuclei of two atoms is about 1.46 ∘A. Mass of chlorine atom is about 35.5 times as massive as hydrogen atom and nearly all mass is concentrated at its nucleus. The distance of centre of mass from hydrogen atom is
Answer» In the HCl molecule, separation between the nuclei of two atoms is about $1.46 \circ A$ . Mass of chlorine atom is about $35.5$ times as massive as hydrogen atom and nearly all mass is concentrated at its nucleus. The distance of centre of mass from hydrogen atom is

Discussion

2118.	The oxidation number of S inH2SO4 is . How?
Answer» The oxidation number of S inH2SO4 is . How?

Discussion

2119.	The weight of a molecule of the compound C60H122 is
Answer» The weight of a molecule of the compound $C_{60} H_{122}$ is

Discussion

2120.	Question 12Identify the unsaturated compounds from the following(i) Propane(ii) Propene(iii) Propyne(iv) Chloropropane(a) (i) and (ii)(b) (ii) and (iv)(c) (iii) and (iv)(d) (ii) and (iii)
Answer» Question 12 Identify the unsaturated compounds from the following (i) Propane (ii) Propene (iii) Propyne (iv) Chloropropane (a) (i) and (ii) (b) (ii) and (iv) (c) (iii) and (iv) (d) (ii) and (iii)

Discussion

2121.	An atom having a completely filled outermost shell:
Answer» An atom having a completely filled outermost shell:

Discussion

2122.	We can get the smell of perfume sitting several meters away, why?
Answer» We can get the smell of perfume sitting several meters away, why?

Discussion

2123.	The volume of a "10 volume solution" of H2O2 required to liberate 500mL O2 at N.T.P, is:
Answer» The volume of a "10 volume solution" of H₂O₂ required to liberate 500mL O₂ at N.T.P, is:

Discussion

2124.	If number of electrons in an atom is 8 and number of protons is also 8, then (i) What is the atomic number of the atom? (ii) What is the charge on the atom?
Answer» If number of electrons in an atom is 8 and number of protons is also 8, then (i) What is the atomic number of the atom? (ii) What is the charge on the atom?

Discussion

2125.	0.30 g of an organic compound C, H and Oxygen on combustion yields 0.44g CO2 and 0.18 g H2O. If one mole of compound weighs 60, then molecular formula of the compound is
Answer» 0.30 g of an organic compound C, H and Oxygen on combustion yields 0.44g $C O_{2}$ and 0.18 g $H_{2} O$ . If one mole of compound weighs 60, then molecular formula of the compound is

Discussion

2126.	Which among the following is a feature of nuclear model of an atom as proposed by Rutherford?
Answer» Which among the following is a feature of nuclear model of an atom as proposed by Rutherford?

Discussion

2127.	H_{2 + }I_2 ----> 2HI (An elementary reaction ) if the volume of the container containing the gaseous mixture is increased to two times, the final final rate of the reaction is ?
Answer» H_{2 + }I_2 ----> 2HI (An elementary reaction ) if the volume of the container containing the gaseous mixture is increased to two times, the final final rate of the reaction is ?

Discussion

2128.	Why does the temperature remain constant during the boiling of water even though heat is supplied contivuously ?
Answer» Why does the temperature remain constant during the boiling of water even though heat is supplied contivuously ?

Discussion

2129.	Which technique is used in diagnostic laboratories for blood and urine test?
Answer» Which technique is used in diagnostic laboratories for blood and urine test?

Discussion

2130.	Brownian motion is caused by 1.impact of dispersion medium on dispersed phase particles2.attractive Force between particles 3.convection current 4.heating of liquid state
Answer» Brownian motion is caused by 1.impact of dispersion medium on dispersed phase particles 2.attractive Force between particles 3.convection current 4.heating of liquid state

Discussion

2131.	{100ml of }10^{-5}(M)CaCl_2 solution is mixed with }100ml}{ of }10^{-5}(M)Na_2CO_3 solution. In order to observe the }}{ precipitation of }CaCO_3 , what percentage of the volume }}{ (in terms of }10^1 ) of solution should be reduced in nearest }} possible integers? }{ Given: }K_{sp} of }CaCO_3=49×10^{-10
Answer» {100ml of }10^{-5}(M)CaCl_2 solution is mixed with }100ml}{ of }10^{-5}(M)Na_2CO_3 solution. In order to observe the }}{ precipitation of }CaCO_3 , what percentage of the volume }}{ (in terms of }10^1 ) of solution should be reduced in nearest }} possible integers? }{ Given: }K_{sp} of }CaCO_3=49×10^{-10

Discussion

2132.	Crystallisation is better than simple evaporation because:
Answer» Crystallisation is better than simple evaporation because:

Discussion

2133.	Question 7Describe characteristics and uses of coke.
Answer» Question 7 Describe characteristics and uses of coke.

Discussion

2134.	The temperature of a gas filled in closed vessel reduces by 1 degree celsius. Calculate the ratio of change in pressure to the original pressure of the gas
Answer» The temperature of a gas filled in closed vessel reduces by 1 degree celsius. Calculate the ratio of change in pressure to the original pressure of the gas

Discussion

2135.	why can't ozone have a triangular structure?
Answer» why can't ozone have a triangular structure?

Discussion

2136.	When steam is passed over red hot iron, magnetic oxide of iron and hydrogen are obtained. "The reaction between steam and red hot iron is a Reversible Reaction ".What is meant by this statement?
Answer» When steam is passed over red hot iron, magnetic oxide of iron and hydrogen are obtained. "The reaction between steam and red hot iron is a Reversible Reaction ".What is meant by this statement?

Discussion

2137.	(i) Under what conditions iron reacts with water. (ii) Give the balanced equation of the reaction. (iii) What is noticed if the products are not allowed to escape ?
Answer» (i) Under what conditions iron reacts with water. (ii) Give the balanced equation of the reaction. (iii) What is noticed if the products are not allowed to escape ?

2137.

(i) Under what conditions iron reacts with water. (ii) Give the balanced equation of the reaction. (iii) What is noticed if the products are not allowed to escape ?

Answer»

(i) Under what conditions iron reacts with water.

(ii) Give the balanced equation of the reaction.

(iii) What is noticed if the products are not allowed to escape ?

Discussion

2138.	For any two sets A and B, [B' ∪ (B' – A)]' is equal to ____________.
Answer» For any two sets A and B, [B' ∪ (B' – A)]' is equal to ____________.

Discussion

2139.	Write a short note on properties of plastics.
Answer» Write a short note on properties of plastics.

Discussion

2140.	30.what is the electric potential at the surface of the gold nucleus? the nuclear radius is 6.6*10 to the power -15 m and the atomic numbe of gold, Z=79
Answer» 30.what is the electric potential at the surface of the gold nucleus? the nuclear radius is 6.6*10 to the power -15 m and the atomic numbe of gold, Z=79

Discussion

2141.	Explain neutralization reaction with the help of chemical equation. What will be the products for the reaction:H2SO4 + NaOH → ?
Answer» Explain neutralization reaction with the help of chemical equation. What will be the products for the reaction: $H_{2} S O_{4} + N a O H \to ?$

2141.

Explain neutralization reaction with the help of chemical equation. What will be the products for the reaction:H2SO4 + NaOH → ?

Answer»

Explain neutralization reaction with the help of chemical equation. What will be the products for the reaction:

$H_{2} S O_{4} + N a O H \to ?$

Discussion

2142.	A dry pellet of a common base B, when kept in open absorbs moisture and turns sticky. The compound is also a by-product of chlor-alkali process. Identify B, what type of reaction occurs when B is treated with an acidic oxide ? Write a balanced chemical equation for one such solution.
Answer» A dry pellet of a common base B, when kept in open absorbs moisture and turns sticky. The compound is also a by-product of chlor-alkali process. Identify B, what type of reaction occurs when B is treated with an acidic oxide ? Write a balanced chemical equation for one such solution.

Discussion

2143.	What kind of mixture is ink+ water
Answer» What kind of mixture is ink+ water

Discussion

2144.	Atomic mass of 118 elements without decimals
Answer» Atomic mass of 118 elements without decimals

Discussion

2145.	Which general electronic configuration of the element does not represent a non-metal? (1) ns2,np4 (2) ns2, (n-1)d1-10,np5 (3) ns2, (n- 1) d1-10,np1-6 (4)ns1-2,(n-1)d1-10
Answer» Which general electronic configuration of the element does not represent a non-metal? (1) ns2,np4 (2) ns2, (n-1)d1-10,np5 (3) ns2, (n- 1) d1-10,np1-6 (4)ns1-2,(n-1)d1-10

Discussion

2146.	what is the molality of 648g of pure water?
Answer» what is the molality of 648g of pure water?

Discussion

2147.	What is meant by mole? What is the different between mole and atom?
Answer» What is meant by mole? What is the different between mole and atom?

Discussion

2148.	66.Three liquids of d ensities r1, r2 and r3 (with r1 > r2 > r3), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact q1, q2 and q3 obey:-
Answer» 66.Three liquids of d ensities r1, r2 and r3 (with r1 > r2 > r3), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact q1, q2 and q3 obey:-

Discussion

2149.	Why is Cr+2 more good reducing agent then Fe+2 with out using electrode potential concept
Answer» Why is Cr+2 more good reducing agent then Fe+2 with out using electrode potential concept

Discussion

2150.	What is the mass of H2O in 1000kg of CuSO4.10H2O?
Answer» What is the mass of H2O in 1000kg of CuSO4.10H2O?

Discussion

Explore topic-wise InterviewSolutions in .

We all love the fizz sound that comes from the bubbles which come out of a soft drink bottle but what gas are those bubbles made of?

In PO43- ion the average charge on the oxygen atoms is

The number of moles of Fe2O3 formed when 0.5 moles of O2 and 0.5 moles of Fe are allowed to react are

Which one of the following sets of phenomena would increase on raising the temperature?(a) Diffusion, evaporation, compression of gases(b) Evaporation, compression of gases, solubility(c) Evaporation, diffusion, expansion of gases(d) Evaporation, solubility, diffusion, compression of gases

equal maeses of h2 ,o2 and helium are taken in closed container at stp ratio of moles of gases

Which of the following reaction produces a base?

In the reaction, C2O2−4 → CO2 , the total number of electrons lost per mole of C2O−24 is

How does an electron differ from a neutron?

Question 22Why did Rutherford select a gold foil in his alpha-ray scattering experiment?

Number of sp hybridized carbon atoms in the following compound are CH_{3 }-CH=C=C=CH-C≡ CH Options: a) 2 b) 4 c) 5 d) 6

Finely divided metals and metal oxides on reaction with hydrogen peroxide liberate __ gas.

54.Find number of oxygen atoms in 100 mg of caco3{atomic mass of ca=40u,c=12u,o=16u

Pick the odd one out.

Show the electron dot structure of KCN in which both ionic and covalent bond exists.

why is one end of polysaccchride reducing and other end non reducing

What type of mixture is air?

In the HCl molecule, separation between the nuclei of two atoms is about 1.46 ∘A. Mass of chlorine atom is about 35.5 times as massive as hydrogen atom and nearly all mass is concentrated at its nucleus. The distance of centre of mass from hydrogen atom is

The oxidation number of S inH2SO4 is . How?

The weight of a molecule of the compound C60H122 is

Question 12Identify the unsaturated compounds from the following(i) Propane(ii) Propene(iii) Propyne(iv) Chloropropane(a) (i) and (ii)(b) (ii) and (iv)(c) (iii) and (iv)(d) (ii) and (iii)

An atom having a completely filled outermost shell:

We can get the smell of perfume sitting several meters away, why?

The volume of a "10 volume solution" of H2O2 required to liberate 500mL O2 at N.T.P, is:

If number of electrons in an atom is 8 and number of protons is also 8, then ​(i) What is the atomic number of the atom? (ii) What is the charge on the atom?

0.30 g of an organic compound C, H and Oxygen on combustion yields 0.44g CO2 and 0.18 g H2O. If one mole of compound weighs 60, then molecular formula of the compound is

Which among the following is a feature of nuclear model of an atom as proposed by Rutherford?

H_{2 + }I_2 ----> 2HI (An elementary reaction ) if the volume of the container containing the gaseous mixture is increased to two times, the final final rate of the reaction is ?

Why does the temperature remain constant during the boiling of water even though heat is supplied contivuously ?

Which technique is used in diagnostic laboratories for blood and urine test?

Brownian motion is caused by 1.impact of dispersion medium on dispersed phase particles2.attractive Force between particles 3.convection current 4.heating of liquid state

Crystallisation is better than simple evaporation because:

Question 7Describe characteristics and uses of coke.

The temperature of a gas filled in closed vessel reduces by 1 degree celsius. Calculate the ratio of change in pressure to the original pressure of the gas

why can't ozone have a triangular structure?

When steam is passed over red hot iron, magnetic oxide of iron and hydrogen are obtained. "The reaction between steam and red hot iron is a Reversible Reaction ".What is meant by this statement?

(i) Under what conditions iron reacts with water. (ii) Give the balanced equation of the reaction. (iii) What is noticed if the products are not allowed to escape ?

For any two sets A and B, [B' ∪ (B' – A)]' is equal to ____________.

Write a short note on properties of plastics.

30.what is the electric potential at the surface of the gold nucleus? the nuclear radius is 6.6*10 to the power -15 m and the atomic numbe of gold, Z=79

Explain neutralization reaction with the help of chemical equation. What will be the products for the reaction:H2SO4 + NaOH → ?

A dry pellet of a common base B, when kept in open absorbs moisture and turns sticky. The compound is also a by-product of chlor-alkali process. Identify B, what type of reaction occurs when B is treated with an acidic oxide ? Write a balanced chemical equation for one such solution.

What kind of mixture is ink+ water

Atomic mass of 118 elements without decimals

Which general electronic configuration of the element does not represent a non-metal? (1) ns2,np4 (2) ns2, (n-1)d1-10,np5 (3) ns2, (n- 1) d1-10,np1-6 (4)ns1-2,(n-1)d1-10

what is the molality of 648g of pure water?

What is meant by mole? What is the different between mole and atom?

66.Three liquids of d ensities r1, r2 and r3 (with r1 > r2 > r3), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact q1, q2 and q3 obey:-

Why is Cr+2 more good reducing agent then Fe+2 with out using electrode potential concept

What is the mass of H2O in 1000kg of CuSO4.10H2O?

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