10223 + Interview Questions in Chemistry Page 59 InterviewSolution

2901.	Explain diffusion of copper sulphate into water .
Answer» Explain diffusion of copper sulphate into water .

Discussion

2902.	Peroxy acids of sulphur are:
Answer» Peroxy acids of sulphur are:

Discussion

2903.	If we calculate the oxidation state of oxygen in Na2O2, why is it + 1 ?
Answer» If we calculate the oxidation state of oxygen in Na2O2, why is it + 1 ?

Discussion

2904.	What is atomic orbital
Answer» What is atomic orbital

Discussion

2905.	why is pressure v.s volume a curved graph instead of a linear graph considering that pressure multiplied by volume is a constant ?
Answer» why is pressure v.s volume a curved graph instead of a linear graph considering that pressure multiplied by volume is a constant ?

Discussion

2906.	31. If we form a solution by mixing a solid and a liquid, and the solution formed is a solid then will the solid be the solvent and the liquid the solute?
Answer» 31. If we form a solution by mixing a solid and a liquid, and the solution formed is a solid then will the solid be the solvent and the liquid the solute?

Discussion

2907.	Question 2 Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?
Answer» Question 2 Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

Discussion

2908.	If a = c and b = c, then.
Answer» If a = c and b = c, then.

Discussion

2909.	If we rub a plastic comb on dry hair for some time and bring this comb near small pieces of paper, it attracts small pieces of paper. Which of the following can be related to this?
Answer» If we rub a plastic comb on dry hair for some time and bring this comb near small pieces of paper, it attracts small pieces of paper. Which of the following can be related to this?

Discussion

2910.	Question 7In the Thomson's model of an atom, which of the following statements are correct?(i) The mass of the atom is assumed to be uniformly distributed over the atom.(ii) The positive charge is assumed to be uniformly distributed over the atom.(iii) The electrons are uniformly distributed in the positively charged sphere.(iv) The electrons attract each other to stabilise the atom.(a) (i), (ii) and (iii)(b) (i) and (iii)(c) (i) and (iv)(d) (i), (iii) and (iv)
Answer» Question 7 In the Thomson's model of an atom, which of the following statements are correct? (i) The mass of the atom is assumed to be uniformly distributed over the atom. (ii) The positive charge is assumed to be uniformly distributed over the atom. (iii) The electrons are uniformly distributed in the positively charged sphere. (iv) The electrons attract each other to stabilise the atom. (a) (i), (ii) and (iii) (b) (i) and (iii) (c) (i) and (iv) (d) (i), (iii) and (iv)

Discussion

2911.	Calculate the volume occupied by (1)28u nitrogen gas (2)28g N2 gas at STP
Answer» Calculate the volume occupied by (1)28u nitrogen gas (2)28g N2 gas at STP

Discussion

2912.	what is Poisson ratio?
Answer» what is Poisson ratio?

Discussion

2913.	According to Dalton's atomic theory, "Atoms of a given elements are ___ in mass and chemical properties".
Answer» According to Dalton's atomic theory, "Atoms of a given elements are ___ in mass and chemical properties".

Discussion

2914.	According to Newland’s classification of elements, the properties of sulphur are similar to those of oxygen because sulphur is the ______ element starting from oxygen.
Answer» According to Newland’s classification of elements, the properties of sulphur are similar to those of oxygen because sulphur is the ______ element starting from oxygen.

Discussion

2915.	Write the chemical symbol for the elements:Magnesium, Copper, Cobalt, Tungsten, and Potassium.
Answer» Write the chemical symbol for the elements: Magnesium, Copper, Cobalt, Tungsten, and Potassium.

Discussion

2916.	am i right in saying that definite composition is a composition in which there is only one single component present.
Answer» am i right in saying that definite composition is a composition in which there is only one single component present.

Discussion

2917.	16. How rate of diffusion change with change in temperature ?
Answer» 16. How rate of diffusion change with change in temperature ?

Discussion

2918.	During extraction of iron from its oxides, in blast furnace reduction of iron oxides takes place at different temperature ranges. Which of the following reaction doesn't occur at the temperature range of 500−800 K.
Answer» During extraction of iron from its oxides, in blast furnace reduction of iron oxides takes place at different temperature ranges. Which of the following reaction doesn't occur at the temperature range of $500 - 800 K$ .

Discussion

2919.	Which one of them is an odd-electron molecule?
Answer» Which one of them is an odd-electron molecule?

Discussion

2920.	Name the allotrope of carbon which has a hexagonal arrangement of atoms.
Answer» Name the allotrope of carbon which has a hexagonal arrangement of atoms.

Discussion

2921.	Which is the only metal that is liquid at standard conditions of temperature and pressure?
Answer» Which is the only metal that is liquid at standard conditions of temperature and pressure?

Discussion

2922.	Assertion: Larger the value of cryoscopic constant of the solvent, lesser will be the freezing point of the solution. Reason: Depression in the freezing point depends on nature of the solvent.
Answer» Assertion: Larger the value of cryoscopic constant of the solvent, lesser will be the freezing point of the solution. Reason: Depression in the freezing point depends on nature of the solvent.

Discussion

2923.	The molality of 5.2 g of ethanol in 98 g of water is approximately
Answer» The molality of 5.2 g of ethanol in 98 g of water is approximately

Discussion

2924.	Which of the following is obtained on decomposition of moderately concentrated HNO3
Answer» Which of the following is obtained on decomposition of moderately concentrated $H N O_{3}$

Discussion

2925.	State the two laws of chemical combination. [2 MARKS]
Answer» State the two laws of chemical combination. [2 MARKS]

Discussion

2926.	Question 9(a)What is the mass of:(a)0.2 mole of oxygen atoms?
Answer» Question 9(a) What is the mass of: (a)0.2 mole of oxygen atoms?

Discussion

2927.	Which of the following statement is true about evaporation?
Answer» Which of the following statement is true about evaporation?

Discussion

2928.	Why +R groups donate electron to carboncarbon double bond?
Answer» Why +R groups donate electron to carbon carbon double bond?

Discussion

2929.	What are compounds
Answer» What are compounds

Discussion

2930.	Is neutron stable in nucleus or outside the nucleus ?
Answer» Is neutron stable in nucleus or outside the nucleus ?

Discussion

2931.	(i) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom?(ii) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
Answer» (i) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom? (ii) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?

Discussion

2932.	Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t=0 it was 1600 counts per second and t=8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t=6 seconds is close to
Answer» Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At $t = 0$ it was $1600$ counts per second and $t = 8 seconds$ it was $100 counts$ per second. The count rate observed, as counts per second, at $t = 6 seconds$ is close to

Discussion

2933.	Nonmetal X is the main component present in stars. Name the nonmetal X.
Answer» Nonmetal X is the main component present in stars. Name the nonmetal X.

Discussion

2934.	0.35g alloy of aluminium and copper in reaction with dil.HCl gave 415ml of H2 gas at NTP. Determine percentage composition of alloy.
Answer» 0.35g alloy of aluminium and copper in reaction with dil.HCl gave 415ml of H2 gas at NTP. Determine percentage composition of alloy.

Discussion

2935.	40.Why does the solubility of alkaline earth metal hydroxides in water increase down the group?
Answer» 40.Why does the solubility of alkaline earth metal hydroxides in water increase down the group?

Discussion

2936.	Pressure on the surface of a gas is increased.what will happen to the inter particle forces
Answer» Pressure on the surface of a gas is increased.what will happen to the inter particle forces

Discussion

2937.	Each molecule of a gas has f degree of freedom . The ration of cp/cv =y for which gas
Answer» Each molecule of a gas has f degree of freedom . The ration of cp/cv =y for which gas

Discussion

2938.	The reaction of sodium thiosulphate with I2 produces:
Answer» The reaction of sodium thiosulphate with $I_{2}$ produces:

Discussion

2939.	Assuming bohr's model of hydrogen atom the wavelength of α-line of balmer series is λ.The wavelength of α-line of lyman series is 1.27/128λ 2.5λ/27 3.27/32λ 4.5λ/3
Answer» Assuming bohr's model of hydrogen atom the wavelength of α-line of balmer series is λ.The wavelength of α-line of lyman series is 1.27/128λ 2.5λ/27 3.27/32λ 4.5λ/3

Discussion

2940.	20ml of ethane on combustion with 20ml of o2 hives how much volume of co2 at same temperature and pressure?
Answer» 20ml of ethane on combustion with 20ml of o2 hives how much volume of co2 at same temperature and pressure?

Discussion

2941.	Which of the following elements has the least atomic radii?
Answer» Which of the following elements has the least atomic radii?

Discussion

2942.	What are the rules to represent an element?
Answer» What are the rules to represent an element?

Discussion

2943.	What will be the colour of solution when I add Pottasium Permanganate to Butter(ghee)
Answer» What will be the colour of solution when I add Pottasium Permanganate to Butter(ghee)

Discussion

2944.	In numericals of vant Hoff factor how to find the value of n ?
Answer» In numericals of vant Hoff factor how to find the value of n ?

Discussion

2945.	2-Bromopentane is heated with EtONa in ethanol. The major product obtained is (1)2-Ethoxypentane (2)Pent-1-ene (3)Isobutane (4)Pent-2-ene
Answer» 2-Bromopentane is heated with EtONa in ethanol. The major product obtained is (1)2-Ethoxypentane (2)Pent-1-ene (3)Isobutane (4)Pent-2-ene

Discussion

2946.	a gaseous mixture of He,CH4,SO2 was allow to effuse through a fine hole .If the mole ratio is 1:2:3 then what will be the molar ratio
Answer» a gaseous mixture of He,CH4,SO2 was allow to effuse through a fine hole .If the mole ratio is 1:2:3 then what will be the molar ratio

Discussion

2947.	What is/are the catalyst used for the formation of Ammonia.
Answer» What is/are the catalyst used for the formation of Ammonia.

Discussion

2948.	For a closed (non rigid) container containing n=10 moles of an ideal gas fitted with movable, frictionless, weightless piston operating such that pressure of gas remains constant at 0.821 atm, which graph represents correct variation of logV vs logT where V is in litre and T in kelvin.
Answer» For a closed (non rigid) container containing $n = 10 moles$ of an ideal gas fitted with movable, frictionless, weightless piston operating such that pressure of gas remains constant at $0.821 atm$ , which graph represents correct variation of $log V vs log T$ where $V$ is in litre and $T$ in kelvin.

Discussion

2949.	When lead reacts with copper sulphate solution, a reddish-brown deposit of is formed.
Answer» When lead reacts with copper sulphate solution, a reddish-brown deposit of is formed.

Discussion

2950.	If 'a'is the radius of the 1st shell of H-atom, the wavelength of electron in 3rd shell of He+ is?
Answer» If 'a'is the radius of the 1st shell of H-atom, the wavelength of electron in 3rd shell of He+ is?

Discussion

Explore topic-wise InterviewSolutions in .

Explain diffusion of copper sulphate into water .

Peroxy acids of sulphur are:

If we calculate the oxidation state of oxygen in Na2O2, why is it + 1 ?

What is atomic orbital

why is pressure v.s volume a curved graph instead of a linear graph considering that pressure multiplied by volume is a constant ?

31. If we form a solution by mixing a solid and a liquid, and the solution formed is a solid then will the solid be the solvent and the liquid the solute?

Question 2 Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

If a = c and b = c, then.

If we rub a plastic comb on dry hair for some time and bring this comb near small pieces of paper, it attracts small pieces of paper. Which of the following can be related to this?

Calculate the volume occupied by (1)28u nitrogen gas (2)28g N2 gas at STP

what is Poisson ratio?

According to Dalton's atomic theory, "Atoms of a given elements are ___ in mass and chemical properties".

According to Newland’s classification of elements, the properties of sulphur are similar to those of oxygen because sulphur is the ______ element starting from oxygen.

Write the chemical symbol for the elements:Magnesium, Copper, Cobalt, Tungsten, and Potassium.

am i right in saying that definite composition is a composition in which there is only one single component present.

16. How rate of diffusion change with change in temperature ?

During extraction of iron from its oxides, in blast furnace reduction of iron oxides takes place at different temperature ranges. Which of the following reaction doesn't occur at the temperature range of 500−800 K.

Which one of them is an odd-electron molecule?

Name the allotrope of carbon which has a hexagonal arrangement of atoms.

Which is the only metal that is liquid at standard conditions of temperature and pressure?

Assertion: Larger the value of cryoscopic constant of the solvent, lesser will be the freezing point of the solution. Reason: Depression in the freezing point depends on nature of the solvent.

The molality of 5.2 g of ethanol in 98 g of water is approximately

Which of the following is obtained on decomposition of moderately concentrated HNO3

State the two laws of chemical combination. [2 MARKS]

Question 9(a)What is the mass of:(a)0.2 mole of oxygen atoms?

Which of the following statement is true about evaporation?

Why +R groups donate electron to carboncarbon double bond?

What are compounds

Is neutron stable in nucleus or outside the nucleus ?

(i) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom?​(ii) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?

Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t=0 it was 1600 counts per second and t=8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t=6 seconds is close to

Nonmetal X is the main component present in stars. Name the nonmetal X.

0.35g alloy of aluminium and copper in reaction with dil.HCl gave 415ml of H2 gas at NTP. Determine percentage composition of alloy.

40.Why does the solubility of alkaline earth metal hydroxides in water increase down the group?

Pressure on the surface of a gas is increased.what will happen to the inter particle forces

Each molecule of a gas has f degree of freedom . The ration of cp/cv =y for which gas

The reaction of sodium thiosulphate with I2 produces:

Assuming bohr's model of hydrogen atom the wavelength of α-line of balmer series is λ.The wavelength of α-line of lyman series is 1.27/128λ 2.5λ/27 3.27/32λ 4.5λ/3

20ml of ethane on combustion with 20ml of o2 hives how much volume of co2 at same temperature and pressure?

Which of the following elements has the least atomic radii?

What are the rules to represent an element?

What will be the colour of solution when I add Pottasium Permanganate to Butter(ghee)

In numericals of vant Hoff factor how to find the value of n ?

2-Bromopentane is heated with EtONa in ethanol. The major product obtained is (1)2-Ethoxypentane (2)Pent-1-ene (3)Isobutane (4)Pent-2-ene

a gaseous mixture of He,CH4,SO2 was allow to effuse through a fine hole .If the mole ratio is 1:2:3 then what will be the molar ratio

What is/are the catalyst used for the formation of Ammonia.

For a closed (non rigid) container containing n=10 moles of an ideal gas fitted with movable, frictionless, weightless piston operating such that pressure of gas remains constant at 0.821 atm, which graph represents correct variation of logV vs logT where V is in litre and T in kelvin.

When lead reacts with copper sulphate solution, a reddish-brown deposit of is formed.

If 'a'is the radius of the 1st shell of H-atom, the wavelength of electron in 3rd shell of He+ is?

(i) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom?(ii) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?