7248 + Interview Questions in Chemistry Page 8 InterviewSolution

351.	Detailed solution of reaction of non metals with water
Answer» Detailed solution of reaction of non metals with water

Discussion

352.	An early, but in correct, model of the hydrogen atomproposed by J.J.Thomson, proposed that the atom canbe considered as a positive cloud of charge +euniformly distributed throughout the volume of asphere of radius R, with the electron (an equalmagnitude negatively charged particle) at the centre.Using Gauss law or otherwise, we can show that theelectron will be in equilibrium at the centre.If the electron is displaced from the centre by a radialdistance r, it would experience a force (r
Answer» An early, but in correct, model of the hydrogen atomproposed by J.J.Thomson, proposed that the atom canbe considered as a positive cloud of charge +euniformly distributed throughout the volume of asphere of radius R, with the electron (an equalmagnitude negatively charged particle) at the centre.Using Gauss law or otherwise, we can show that theelectron will be in equilibrium at the centre.If the electron is displaced from the centre by a radialdistance r, it would experience a force (r

Discussion

353.	What is reactivity series?what happens when iron reacts with copper sulphate solution?
Answer» What is reactivity series?what happens when iron reacts with copper sulphate solution?

Discussion

354.	ntThe kinetic energy of the electron in second orbit (bohr radius is a')n
Answer» ntThe kinetic energy of the electron in second orbit (bohr radius is a')n

Discussion

355.	What is the volume occupied by 28 u of nitrogen gas
Answer» What is the volume occupied by 28 u of nitrogen gas

Discussion

356.	In which of the following method of the removal of hardness, Ca+2 and Mg+2 are not separated from ample of hard water?(1) By boiling of temporary hard water(2) Addition of sodium carbonate(3) Using sodium hexa meta phosphate(4) Synethetic resins and zeolite method
Answer» In which of the following method of the removal of hardness, Ca+2 and Mg+2 are not separated from ample of hard water?(1) By boiling of temporary hard water(2) Addition of sodium carbonate(3) Using sodium hexa meta phosphate(4) Synethetic resins and zeolite method

Discussion

357.	What is the main difference between diamond and glass?
Answer» What is the main difference between diamond and glass?

Discussion

358.	One mole of monoatomic gas is at pressure p0and volume V0, the adiabatic compressibility of gas is given by
Answer» One mole of monoatomic gas is at pressure p₀ and volume V₀, the adiabatic compressibility of gas is given by

Discussion

359.	Find the valency and valence electrons in Aluminium (Atomic number =13)
Answer» Find the valency and valence electrons in Aluminium (Atomic number =13)

Discussion

360.	Why klamda/r is used
Answer» Why klamda/r is used

Discussion

361.	Which among the following is correctly represented?
Answer» Which among the following is correctly represented?

Discussion

362.	The gas argon does not take part in chemical reactions. What do you think is its valency?
Answer» The gas argon does not take part in chemical reactions. What do you think is its valency?

Discussion

363.	A silver wire dipped in 0.1 M HCl solution saturated with AgCl develops oxidation potential of −0.208 V.The standard electrode potential of E∘Ag+/Ag=−0.799V, then Ksp of AgCl in pure water will be
Answer» A silver wire dipped in $0.1 M H C l$ solution saturated with $A g C l$ develops oxidation potential of $- 0.208 V$ . The standard electrode potential of $E_{A g^{+} / A g}^{\circ} = - 0.799 V$ , then $K_{s p}$ of $A g C l$ in pure water will be

Discussion

364.	What happens when(a) Dilute sulphuric acid is poured on a copper plate?Write word equations of the reactions involved.(b) Iron nails are placed in copper sulphate solution?Write word equations of the reactions involved.
Answer» What happens when (a) Dilute sulphuric acid is poured on a copper plate? Write word equations of the reactions involved. (b) Iron nails are placed in copper sulphate solution? Write word equations of the reactions involved.

Discussion

365.	When nitric acid HNO3 reacts with metals, hydrogen gas is not observed because
Answer» When nitric acid $H N O_{3}$ reacts with metals, hydrogen gas is not observed because

Discussion

366.	What kind of combustion is it if the burning is caused in petrol pumps?Is it rapid or spontaneous combustion?
Answer» What kind of combustion is it if the burning is caused in petrol pumps? Is it rapid or spontaneous combustion?

Discussion

367.	AB2 is 10% dissociated in water to A2+ and B−. The boiling point of a 10.0 molal aqueous solution of AB2 is ∘C. (Round off to the nearest Integer).[Given: Molal elevation constant of water Kb =0.5 K kg mol−1, boiling point of pure water =100 ∘C]
Answer» $A B_{2}$ is $10 %$ dissociated in water to $A^{2 +}$ and $B^{-}$ . The boiling point of a $10.0$ molal aqueous solution of $A B_{2}$ is $^{\circ} C .$ (Round off to the nearest Integer). [Given: Molal elevation constant of water $K_{b} = 0.5 {K kg mol}^{- 1}$ , boiling point of pure water $= 100^{\circ} C$ ]

Discussion

368.	State some of the exceptions that the following elements display with respect to the properties of metals and nonmetals elements are gallium Mercury and Iodine.
Answer» State some of the exceptions that the following elements display with respect to the properties of metals and nonmetals elements are gallium Mercury and Iodine.

Discussion

369.	Which of the following is not a neutralisation reaction?
Answer» Which of the following is not a neutralisation reaction?

Discussion

370.	Write a short notes on soaps and detergents.
Answer» Write a short notes on soaps and detergents.

Discussion

371.	Select the correct pair:
Answer» Select the correct pair:

371.

Select the correct pair:

Answer»

Select the correct pair:

Discussion

372.	Which of the following is not a consequence of acid rain?
Answer» Which of the following is not a consequence of acid rain?

Discussion

373.	At what height above the surface of earth the value of g decreases by 2% ?(radius of the earth is 6400 km)
Answer» At what height above the surface of earth the value of $g$ decreases by $2 %$ ? $($ radius of the earth is $6400 km)$

Discussion

374.	What is meaning of stoichiometry in detail
Answer» What is meaning of stoichiometry in detail

Discussion

375.	Write few uses of Bakelite and Melamine.
Answer» Write few uses of Bakelite and Melamine.

Discussion

376.	Which of the following are true regarding CO2? a. Excess of CO2 acts as a pollutant. b. Plants take in CO2 for photosynthesis. c. Deforestation leads to decrease in the amount of CO2 in air. d. Less quantity of CO2 causes rise in temperature.
Answer» Which of the following are true regarding $C O_{2}$ ? a. Excess of $C O_{2}$ acts as a pollutant. b. Plants take in $C O_{2}$ for photosynthesis. c. Deforestation leads to decrease in the amount of $C O_{2}$ in air. d. Less quantity of $C O_{2}$ causes rise in temperature.

Discussion

377.	Which is the best absorbing material for carbon dioxide?
Answer» Which is the best absorbing material for carbon dioxide?

Discussion

378.	Elements with valency 1 are -
Answer» Elements with valency 1 are -

Discussion

379.	9.Draw energy level diagram of N2(2-) ion
Answer» 9.Draw energy level diagram of N2(2-) ion

Discussion

380.	What are activity series.????
Answer» What are activity series.????

Discussion

381.	9. Which of the following compounds can have mass ratios of C:H:O as 6:1:24? (a) HO-(C=O)-OH (b) HO-(C=O)-H (c) H-(C=O)-H (d) H3CO-(C=O)-H
Answer» 9. Which of the following compounds can have mass ratios of C:H:O as 6:1:24? (a) HO-(C=O)-OH (b) HO-(C=O)-H (c) H-(C=O)-H (d) H3CO-(C=O)-H

Discussion

382.	The halide of a metal MX crystalizes as ccp structure (NaCl type). If all the atoms situated at one of the tetrad axis are removed then what will be the simplest molecular formula of halide
Answer» The halide of a metal MX crystalizes as ccp structure (NaCl type). If all the atoms situated at one of the tetrad axis are removed then what will be the simplest molecular formula of halide

Discussion

383.	What is the nature of the substance with tastes bitter?
Answer» What is the nature of the substance with tastes bitter?

Discussion

384.	Why synthetic fibres are more popular than natural fibres?
Answer» Why synthetic fibres are more popular than natural fibres?

Discussion

385.	Which of the following statements is/are incorrect for isotopes of an element:-
Answer» Which of the following statements is/are incorrect for isotopes of an element:-

Discussion

386.	Why should curd and sour substances not be kept in brass and copper vessels?
Answer» Why should curd and sour substances not be kept in brass and copper vessels?

Discussion

387.	What is Bernoulli theorem and its derivation?
Answer» What is Bernoulli theorem and its derivation?

Discussion

388.	Which of the following is the primary reason for the depletion of ozone layer?
Answer» Which of the following is the primary reason for the depletion of ozone layer?

Discussion

389.	A heater boils certain amount of water in 15 minutes another eat for boils same amount of water train 10 minutes time taken to boil same amount of water when they both have in parallel
Answer» A heater boils certain amount of water in 15 minutes another eat for boils same amount of water train 10 minutes time taken to boil same amount of water when they both have in parallel

Discussion

390.	Question 22Paheli bought a statue made of copper. To her surprise, it acquired a dull green coating after a couple of months. Explain the reason.
Answer» Question 22 Paheli bought a statue made of copper. To her surprise, it acquired a dull green coating after a couple of months. Explain the reason.

Discussion

391.	The total number of vlence electrons in 4.2 g of N ion is(Na is the Avogadro number)
Answer» The total number of vlence electrons in 4.2 g of N ion is(Na is the Avogadro number)

Discussion

392.	Which of the following formula(s) is/are correct?
Answer» Which of the following formula(s) is/are correct?

Discussion

393.	There is a different between the raw materials used in rayon and other synthetic fibres like nylon or polyester. What is the difference?
Answer» There is a different between the raw materials used in rayon and other synthetic fibres like nylon or polyester. What is the difference?

Discussion

394.	Distinguish between the following. (i) Conventional and non-conventional sources of energy (ii) Biogas and natural gas (iii) Ferrous and non-ferrous minerals (iv) Metallic and non-metallic minerals
Answer» Distinguish between the following. (i) Conventional and non-conventional sources of energy (ii) Biogas and natural gas (iii) Ferrous and non-ferrous minerals (iv) Metallic and non-metallic minerals

394.

Distinguish between the following. (i) Conventional and non-conventional sources of energy (ii) Biogas and natural gas (iii) Ferrous and non-ferrous minerals (iv) Metallic and non-metallic minerals

Answer»

Distinguish
between the following.

(i)
Conventional and non-conventional sources of energy

(ii)
Biogas and natural gas

(iii)
Ferrous and non-ferrous minerals

(iv)
Metallic and non-metallic minerals

Discussion

395.	Shamli took a piece of burning charcoal and collected the gas evolved in a test tube. The gas settled at the bottom of the test tube. Which of the following observations is correct?
Answer» Shamli took a piece of burning charcoal and collected the gas evolved in a test tube. The gas settled at the bottom of the test tube. Which of the following observations is correct?

Discussion

396.	In P4O10 the number of co-ordinate bonds is
Answer» In P4O10 the number of co-ordinate bonds is

Discussion

397.	What is spin multiplicity of chromium
Answer» What is spin multiplicity of chromium

Discussion

398.

Complete the following table.(i) Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the Atomic species 9 - 10 - - - (ii) Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the Atomic species 16 32 - - - Sulphur (iii) Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the Atomic species 16 32 - - - Sulphur (iv) Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the Atomic species - 2 - 1 - - (v) Atomic number Mass number Number of neutrons Number of protons Number of electrons Name of the Atomic species - 1 0 1 1 -

Answer» Complete the following table.

(i)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
9	-	10	-	-	-

(ii)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
16	32	-	-	-	Sulphur

(iii)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
16	32	-	-	-	Sulphur

(iv)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
-	2	-	1	-	-

(v)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
-	1	0	1	1	-

Discussion

399.	What is ductility? Give few examples of ductile substances.
Answer» What is ductility? Give few examples of ductile substances.

Discussion

400.	Will the mass of t he catalyst change during a chemical reaction?
Answer» Will the mass of t he catalyst change during a chemical reaction?

Discussion

Explore topic-wise InterviewSolutions in .

Detailed solution of reaction of non metals with water

What is reactivity series?what happens when iron reacts with copper sulphate solution?

ntThe kinetic energy of the electron in second orbit (bohr radius is a')n

What is the volume occupied by 28 u of nitrogen gas

In which of the following method of the removal of hardness, Ca+2 and Mg+2 are not separated from ample of hard water?(1) By boiling of temporary hard water(2) Addition of sodium carbonate(3) Using sodium hexa meta phosphate(4) Synethetic resins and zeolite method

What is the main difference between diamond and glass?

One mole of monoatomic gas is at pressure p0and volume V0, the adiabatic compressibility of gas is given by

Find the valency and valence electrons in Aluminium (Atomic number =13)

Why klamda/r is used

Which among the following is correctly represented?

The gas argon does not take part in chemical reactions. What do you think is its valency?

A silver wire dipped in 0.1 M HCl solution saturated with AgCl develops oxidation potential of −0.208 V.The standard electrode potential of E∘Ag+/Ag=−0.799V, then Ksp of AgCl in pure water will be

What happens when​(a) Dilute sulphuric acid is poured on a copper plate?​Write word equations of the reactions involved.​(b) Iron nails are placed in copper sulphate solution?​Write word equations of the reactions involved.​​

When nitric acid HNO3 reacts with metals, hydrogen gas is not observed because

What kind of combustion is it if the burning is caused in petrol pumps?Is it rapid or spontaneous combustion?

AB2 is 10% dissociated in water to A2+ and B−. The boiling point of a 10.0 molal aqueous solution of AB2 is ∘C. (Round off to the nearest Integer).[Given: Molal elevation constant of water Kb =0.5 K kg mol−1, boiling point of pure water =100 ∘C]

State some of the exceptions that the following elements display with respect to the properties of metals and nonmetals elements are gallium Mercury and Iodine.

Which of the following is not a neutralisation reaction?

Write a short notes on soaps and detergents.

Select the correct pair:

Which of the following is not a consequence of acid rain?

At what height above the surface of earth the value of g decreases by 2% ?(radius of the earth is 6400 km)

What is meaning of stoichiometry in detail

Write few uses of Bakelite and Melamine.

Which of the following are true regarding CO2? a. Excess of CO2 acts as a pollutant. b. Plants take in CO2 for photosynthesis. c. Deforestation leads to decrease in the amount of CO2 in air. d. Less quantity of CO2 causes rise in temperature.

Which is the best absorbing material for carbon dioxide?

Elements with valency 1 are -

9.Draw energy level diagram of N2(2-) ion

What are activity series.????

9. Which of the following compounds can have mass ratios of C:H:O as 6:1:24? (a) HO-(C=O)-OH (b) HO-(C=O)-H (c) H-(C=O)-H (d) H3CO-(C=O)-H

The halide of a metal MX crystalizes as ccp structure (NaCl type). If all the atoms situated at one of the tetrad axis are removed then what will be the simplest molecular formula of halide

What is the nature of the substance with tastes bitter?

Why synthetic fibres are more popular than natural fibres?

Which of the following statements is/are incorrect for isotopes of an element:-

Why should curd and sour substances not be kept in brass and copper vessels?

What is Bernoulli theorem and its derivation?

Which of the following is the primary reason for the depletion of ozone layer?

A heater boils certain amount of water in 15 minutes another eat for boils same amount of water train 10 minutes time taken to boil same amount of water when they both have in parallel

Question 22Paheli bought a statue made of copper. To her surprise, it acquired a dull green coating after a couple of months. Explain the reason.

The total number of vlence electrons in 4.2 g of N ion is(Na is the Avogadro number)

Which of the following formula(s) is/are correct?

There is a different between the raw materials used in rayon and other synthetic fibres like nylon or polyester. What is the difference?

Distinguish between the following. (i) Conventional and non-conventional sources of energy (ii) Biogas and natural gas (iii) Ferrous and non-ferrous minerals (iv) Metallic and non-metallic minerals

Shamli took a piece of burning charcoal and collected the gas evolved in a test tube. The gas settled at the bottom of the test tube. Which of the following observations is correct?

In P4O10 the number of co-ordinate bonds is

What is spin multiplicity of chromium

What is ductility? Give few examples of ductile substances.

Will the mass of t he catalyst change during a chemical reaction?

What happens when(a) Dilute sulphuric acid is poured on a copper plate?Write word equations of the reactions involved.(b) Iron nails are placed in copper sulphate solution?Write word equations of the reactions involved.