7248 + Interview Questions in Chemistry Page 54 InterviewSolution

2651.	water drops are falling down at regular interval from ceiling such that when first dropis about to hit the ground the nth drop is starting from the ceiling as shown .if h1 is vertical distance between the ceiling and the ground then the distance of rth from the ceiling is
Answer» water drops are falling down at regular interval from ceiling such that when first dropis about to hit the ground the nth drop is starting from the ceiling as shown .if h1 is vertical distance between the ceiling and the ground then the distance of rth from the ceiling is

Discussion

2652.	Generally all metals are solids except-
Answer» Generally all metals are solids except-

Discussion

2653.	Fe2O3+CO=FE+CO2 balance
Answer» Fe2O3+CO=FE+CO2 balance

Discussion

2654.	50.The ratio between time periods taken by an electron in bohrs 3rd and 4th orbit for each revolution is
Answer» 50.The ratio between time periods taken by an electron in bohrs 3rd and 4th orbit for each revolution is

Discussion

2655.	27. If velocity of an electron in a Bohr's orbit of hydrogen is given by &quotv" then the value of n is equal to
Answer» 27. If velocity of an electron in a Bohr's orbit of hydrogen is given by "v" then the value of n is equal to

Discussion

2656.	If we mix sugar with table salt, will it be homogeneous mixture?
Answer» If we mix sugar with table salt, will it be homogeneous mixture?

Discussion

2657.	Local conditions, such as heavy rainfall or the removal of plants, may limit the amount of nitrogen, phosphorus, or calcium available to a particular ecosystem, but the amount of carbon available to the system is seldom a problem because:
Answer» Local conditions, such as heavy rainfall or the removal of plants, may limit the amount of nitrogen, phosphorus, or calcium available to a particular ecosystem, but the amount of carbon available to the system is seldom a problem because:

Discussion

2658.	Find the ratio of the number of atoms present in16 g of O2 to 16 g of O3 (1) 1:1(2) 2:1 (3) 1: 3 (4) 1: 2
Answer» Find the ratio of the number of atoms present in16 g of O2 to 16 g of O3 (1) 1:1(2) 2:1 (3) 1: 3 (4) 1: 2

Discussion

2659.	In case of a fire, before the firemen use the water hoses to throw water to douse fire, they shut off the electricity supply for the area. Explain why this is done.
Answer» In case of a fire, before the firemen use the water hoses to throw water to douse fire, they shut off the electricity supply for the area. Explain why this is done.

Discussion

2660.	Which of these material is non-biodegradable?
Answer» Which of these material is non-biodegradable?

Discussion

2661.	Choose the correct order of melting and boiling points of metals?
Answer» Choose the correct order of melting and boiling points of metals?

Discussion

2662.	7. If the speed of an electron in bohr's first orbit of a hydrogen atom is x, then the speed of the electron in 3rd orbit is what?how?
Answer» 7. If the speed of an electron in bohr's first orbit of a hydrogen atom is x, then the speed of the electron in 3rd orbit is what?how?

Discussion

2663.	Question 16 'Osmosisis a special kind of diffusion’. Comment.
Answer» Question 16 'Osmosisis a special kind of diffusion’. Comment.

Discussion

2664.	The reaction between iron and copper sulphate solution represents which type of reaction ?(1) decomposition(2) combination(3) single displacement(4) double decomposition
Answer» The reaction between iron and copper sulphate solution represents which type of reaction ? (1) decomposition (2) combination (3) single displacement (4) double decomposition

Discussion

2665.	Which of the following statements is incorrect?
Answer» Which of the following statements is incorrect?

Discussion

2666.	46. The rate of disappearance of SO2 in the reaction 2SO2+O2=2SO3 is 1.28×10 to the power minus 3g/sec,then the rate of formation of SO3 is a) 0.64×10 to power minus3g/sec b) 0.80× 10 to power minus 3g/sec c) 1.28× 10 to power minus 3g/sec d) 1.60 × 10 to power minus 3 g/sec
Answer» 46. The rate of disappearance of SO2 in the reaction 2SO2+O2=2SO3 is 1.28×10 to the power minus 3g/sec,then the rate of formation of SO3 is a) 0.64×10 to power minus3g/sec b) 0.80× 10 to power minus 3g/sec c) 1.28× 10 to power minus 3g/sec d) 1.60 × 10 to power minus 3 g/sec

Discussion

2667.	What is the sentence type? While Mrs Pushkar was away, the cook, who was in cahoots with the thieves, stole all her jewellery and made off with the loot.
Answer» What is the sentence type? While Mrs Pushkar was away, the cook, who was in cahoots with the thieves, stole all her jewellery and made off with the loot.

2667.

What is the sentence type? While Mrs Pushkar was away, the cook, who was in cahoots with the thieves, stole all her jewellery and made off with the loot.

Answer»

What is the sentence type?

While Mrs Pushkar was away, the cook, who was in cahoots with the thieves, stole all her jewellery and made off with the loot.

Discussion

2668.	What is the meaning that crystalline solids are Anisotropic in nature.
Answer» What is the meaning that crystalline solids are Anisotropic in nature.

Discussion

2669.	Difference between Parallel combination and series combination.
Answer» Difference between Parallel combination and series combination.

Discussion

2670.	Q. The heat of combustion of napthalene (C10H8) at constant volume at 25 degree celcius was found to be -5133 kJ/mol . Calculate the value of enthalpy change at constant pressure if temperature is same.
Answer» Q. The heat of combustion of napthalene (C10H8) at constant volume at 25 degree celcius was found to be -5133 kJ/mol . Calculate the value of enthalpy change at constant pressure if temperature is same.

Discussion

2671.	The lightest element in the periodic table is:
Answer» The lightest element in the periodic table is:

Discussion

2672.	The metal(s) that can be found in free state in nature is/are _______.
Answer» The metal(s) that can be found in free state in nature is/are _______.

Discussion

2673.	Give the advantages of using CNG as a fuel. [2 MARKS]
Answer» Give the advantages of using CNG as a fuel. [2 MARKS]

Discussion

2674.	Let's assume, CO gas is dissolved in water till the saturation level. If we will increase the temperature of the water then what will happen?
Answer» Let's assume, CO gas is dissolved in water till the saturation level. If we will increase the temperature of the water then what will happen?

Discussion

2675.	Formation of gas bubbles in a liquid during a reaction is a called ___
Answer» Formation of gas bubbles in a liquid during a reaction is a called ___

Discussion

2676.	The goldplated ornaments present in the market are made by the process of:
Answer» The goldplated ornaments present in the market are made by the process of:

Discussion

2677.	Why a compound is called sulphate,sulphide or disulphide if they have the same element that is sulphur?
Answer» Why a compound is called sulphate,sulphide or disulphide if they have the same element that is sulphur?

Discussion

2678.	Which of the following gases would be responsible for acid rain?
Answer» Which of the following gases would be responsible for acid rain?

Discussion

2679.	(a) What is a flame? What type of substances, on burning, give a flame? (b) What is the difference between the burning of a candle and the burning of a fuel like coal ?
Answer» (a) What is a flame? What type of substances, on burning, give a flame? (b) What is the difference between the burning of a candle and the burning of a fuel like coal ?

2679.

(a) What is a flame? What type of substances, on burning, give a flame? (b) What is the difference between the burning of a candle and the burning of a fuel like coal ?

Answer»

(a) What is a flame? What type of substances, on burning, give a flame?

(b) What is the difference between the burning of a candle and the burning of a fuel like coal ?

Discussion

2680.	Does the light travel in multiple directions or only in single direction?
Answer» Does the light travel in multiple directions or only in single direction?

Discussion

2681.	Question 3Give two examples of thermosetting plastics.
Answer» Question 3 Give two examples of thermosetting plastics.

2681.

Question 3Give two examples of thermosetting plastics.

Answer»

Question 3

Give two examples of thermosetting plastics.

Discussion

2682.	For the equilibrium,A(g) gives B(g), delta is -40kJ/mol. If the ratio of the activation energies of the forward (Ef) and reverse (Eb) rxn is 2/3 then :(in kj/mol)
Answer» For the equilibrium,A(g) gives B(g), delta is -40kJ/mol. If the ratio of the activation energies of the forward (Ef) and reverse (Eb) rxn is 2/3 then :(in kj/mol)

Discussion

2683.	A cylinder contains either ethylene or propylene. 12 ml of gas required 54 ml of oxygen forcomplete combustion. The gas is
Answer» A cylinder contains either ethylene or propylene. 12 ml of gas required 54 ml of oxygen forcomplete combustion. The gas is

Discussion

2684.	Rayon, a synthetic fibre is mixed with which of the following to make carpets?
Answer» Rayon, a synthetic fibre is mixed with which of the following to make carpets?

Discussion

2685.	Write example of the following. (i) Photolytic decomposition.(ii) Electrolytic decomposition.
Answer» Write example of the following. (i) Photolytic decomposition. (ii) Electrolytic decomposition.

2685.

Write example of the following. (i) Photolytic decomposition.(ii) Electrolytic decomposition.

Answer»

Write example of the following.

(i) Photolytic decomposition.

(ii) Electrolytic decomposition.

Discussion

2686.	41. Photons of equal energy were incident on two different gas samples. One sample containing H atoms in the ground state and the other sample containing H atoms in the excited state with a principal quantum no. n. The photoelectric beams totally ionise the H atoms. If the difference in the kinetic energy is in the two different cases is 12.75 ev.Then find the principle quantum no. n of the excited state.
Answer» 41. Photons of equal energy were incident on two different gas samples. One sample containing H atoms in the ground state and the other sample containing H atoms in the excited state with a principal quantum no. n. The photoelectric beams totally ionise the H atoms. If the difference in the kinetic energy is in the two different cases is 12.75 ev.Then find the principle quantum no. n of the excited state.

Discussion

2687.	Is Methane gas poisonous?
Answer» Is Methane gas poisonous?

Discussion

2688.	Water is formed by the chemical combination of hydrogen and oxygen.A molecule of water consists of 2 atoms of hydrogen and 1 atom of oxygen, combined chemically. Figure 1 represents the molecules in liquid water (black – oxygen atom; gray – hydrogen atom). Which of the following represents water molecules after liquid water is vaporized on boiling?(a) (b) (c)
Answer» Water is formed by the chemical combination of hydrogen and oxygen. A molecule of water consists of 2 atoms of hydrogen and 1 atom of oxygen, combined chemically. Figure 1 represents the molecules in liquid water (black – oxygen atom; gray – hydrogen atom). Which of the following represents water molecules after liquid water is vaporized on boiling? (a) (b) (c)

Discussion

2689.	Which of the following statement is wrong?
Answer» Which of the following statement is wrong?

Discussion

2690.	Which of the following metals will give H2 on reaction with aqueous NaOH:I:Zn II:MgIII:Al IV:Be
Answer» Which of the following metals will give $H_{2}$ on reaction with aqueous $N a O H$ : $I : Z n$ $I I : M g$ $I I I : A l$ $I V : B e$

Discussion

2691.	Which of the following is true about solutions?
Answer» Which of the following is true about solutions?

Discussion

2692.	Distance covered by a particle undergoing SHM in one time period is
Answer» Distance covered by a particle undergoing SHM in one time period is

Discussion

2693.	Which of the following compounds has the same empirical formula as that of glucose (C6H12O6)?
Answer» Which of the following compounds has the same empirical formula as that of glucose (C₆H₁₂O₆)?

Discussion

2694.	Air contains 23% oxygen and 77% nitrogen by weight . The percentage of oxygen by volume is
Answer» Air contains 23% oxygen and 77% nitrogen by weight . The percentage of oxygen by volume is

Discussion

2695.	Milk is a colloid. Select the correct statement regarding milk as colloidal solution.
Answer» Milk is a colloid. Select the correct statement regarding milk as colloidal solution.

Discussion

2696.	As a result of alpha particle scattering experiment, Rutherford concluded that:
Answer» As a result of alpha particle scattering experiment, Rutherford concluded that:

Discussion

2697.	What are redox reactions
Answer» What are redox reactions

Discussion

2698.	One litre of CO2 is passed through red hot coke. The volume becomes 1.4 litres at same temperature and pressure. The composition of the products is ??
Answer» One litre of CO2 is passed through red hot coke. The volume becomes 1.4 litres at same temperature and pressure. The composition of the products is ??

Discussion

2699.	Which of the following is not a charged particle?
Answer» Which of the following is not a charged particle?

Discussion

2700.	Water can be saved by:
Answer» Water can be saved by:

Discussion

Explore topic-wise InterviewSolutions in .

water drops are falling down at regular interval from ceiling such that when first dropis about to hit the ground the nth drop is starting from the ceiling as shown .if h1 is vertical distance between the ceiling and the ground then the distance of rth from the ceiling is

Generally all metals are solids except-

Fe2O3+CO=FE+CO2 balance

50.The ratio between time periods taken by an electron in bohrs 3rd and 4th orbit for each revolution is

27. If velocity of an electron in a Bohr's orbit of hydrogen is given by &quotv" then the value of n is equal to

If we mix sugar with table salt, will it be homogeneous mixture?

Local conditions, such as heavy rainfall or the removal of plants, may limit the amount of nitrogen, phosphorus, or calcium available to a particular ecosystem, but the amount of carbon available to the system is seldom a problem because:

Find the ratio of the number of atoms present in16 g of O2 to 16 g of O3 (1) 1:1(2) 2:1 (3) 1: 3 (4) 1: 2

In case of a fire, before the firemen use the water hoses to throw water to douse fire, they shut off the electricity supply for the area. Explain why this is done.

Which of these material is non-biodegradable?

Choose the correct order of melting and boiling points of metals?

7. If the speed of an electron in bohr's first orbit of a hydrogen atom is x, then the speed of the electron in 3rd orbit is what?how?

Question 16 'Osmosisis a special kind of diffusion’. Comment.

The reaction between iron and copper sulphate solution represents which type of reaction ?(1) decomposition(2) combination(3) single displacement(4) double decomposition

Which of the following statements is incorrect?

46. The rate of disappearance of SO2 in the reaction 2SO2+O2=2SO3 is 1.28×10 to the power minus 3g/sec,then the rate of formation of SO3 is a) 0.64×10 to power minus3g/sec b) 0.80× 10 to power minus 3g/sec c) 1.28× 10 to power minus 3g/sec d) 1.60 × 10 to power minus 3 g/sec

What is the sentence type? While Mrs Pushkar was away, the cook, who was in cahoots with the thieves, stole all her jewellery and made off with the loot.

What is the meaning that crystalline solids are Anisotropic in nature.

Difference between Parallel combination and series combination.

Q. The heat of combustion of napthalene (C10H8) at constant volume at 25 degree celcius was found to be -5133 kJ/mol . Calculate the value of enthalpy change at constant pressure if temperature is same.

The lightest element in the periodic table is:

The metal(s) that can be found in free state in nature is/are _______.

Give the advantages of using CNG as a fuel. [2 MARKS]

Let's assume, CO gas is dissolved in water till the saturation level. If we will increase the temperature of the water then what will happen?

Formation of gas bubbles in a liquid during a reaction is a called ___

The goldplated ornaments present in the market are made by the process of:

Why a compound is called sulphate,sulphide or disulphide if they have the same element that is sulphur?

Which of the following gases would be responsible for acid rain?

(a) What is a flame? What type of substances, on burning, give a flame? (b) What is the difference between the burning of a candle and the burning of a fuel like coal ?

Does the light travel in multiple directions or only in single direction?

Question 3Give two examples of thermosetting plastics.

For the equilibrium,A(g) gives B(g), delta is -40kJ/mol. If the ratio of the activation energies of the forward (Ef) and reverse (Eb) rxn is 2/3 then :(in kj/mol)

A cylinder contains either ethylene or propylene. 12 ml of gas required 54 ml of oxygen forcomplete combustion. The gas is

Rayon, a synthetic fibre is mixed with which of the following to make carpets?

Write example of the following. (i) Photolytic decomposition.(ii) Electrolytic decomposition.

Is Methane gas poisonous?

Which of the following statement is wrong?

Which of the following metals will give H2 on reaction with aqueous NaOH:I:Zn II:MgIII:Al IV:Be

Which of the following is true about solutions?

Distance covered by a particle undergoing SHM in one time period is

Which of the following compounds has the same empirical formula as that of glucose (C6H12O6)?

Air contains 23% oxygen and 77% nitrogen by weight . The percentage of oxygen by volume is

Milk is a colloid. Select the correct statement regarding milk as colloidal solution.

As a result of alpha particle scattering experiment, Rutherford concluded that:

What are redox reactions

One litre of CO2 is passed through red hot coke. The volume becomes 1.4 litres at same temperature and pressure. The composition of the products is ??

Which of the following is not a charged particle?

Water can be saved by: