7248 + Interview Questions in Chemistry Page 73 InterviewSolution

3601.	What chemical will be needed to test the presence of ionic contamination \((SO_4, Cl^-, S_2^-, HS^+) in different sample of water.
Answer» What chemical will be needed to test the presence of ionic contamination \((SO_4, Cl^-, S_2^-, HS^+) in different sample of water.

Discussion

3602.	The efficiency of an ideal heat engine workingbetween the freezing point and boiling point ofwater, is(1) 26.8%(3) 12.5%(2) 20%(4) 6.25%
Answer» The efficiency of an ideal heat engine workingbetween the freezing point and boiling point ofwater, is(1) 26.8%(3) 12.5%(2) 20%(4) 6.25%

Discussion

3603.	Which of the following is/are greenhouse gas(es)?
Answer» Which of the following is/are greenhouse gas(es)?

Discussion

3604.	What are the ways by which a chemical equation can be made more informative ?
Answer» What are the ways by which a chemical equation can be made more informative ?

Discussion

3605.	Impure water can be purified by the process of ___________ .
Answer» Impure water can be purified by the process of ___________ .

Discussion

3606.	The anionic unit of ortho silicates is:
Answer» The anionic unit of ortho silicates is:

Discussion

3607.	Suppose that A and B from the compound B2A3 and B2A.if 0.05 mole of B2A3 weight 9g and 0.1 mole of B2A WEIGHTS 10g the atomic of A and B respectively are
Answer» Suppose that A and B from the compound B2A3 and B2A.if 0.05 mole of B2A3 weight 9g and 0.1 mole of B2A WEIGHTS 10g the atomic of A and B respectively are

Discussion

3608.	8. In acrystalline solid , X atoms occupy HCP and 1/4 of tetrahedral voids are occupied byY atoms . then the empirical formula of the crystallie solid is - 1. X2Y 2. XY2 3.X4Y 4. XY
Answer» 8. In acrystalline solid , X atoms occupy HCP and 1/4 of tetrahedral voids are occupied byY atoms . then the empirical formula of the crystallie solid is - 1. X2Y 2. XY2 3.X4Y 4. XY

Discussion

3609.	Name (a) a soft metal. (b) a metal which is brittle. (c) a non-metal which is lustrous. (d) a liquid metal. (e) a metal which is a poor conductor of electricity. (f) a non-metal which is a good conductor of electricity. (g) a liquid non-metal. (h) the hardest naturally occurring substance. (i) an inert gas.
Answer» Name (a) a soft metal. (b) a metal which is brittle. (c) a non-metal which is lustrous. (d) a liquid metal. (e) a metal which is a poor conductor of electricity. (f) a non-metal which is a good conductor of electricity. (g) a liquid non-metal. (h) the hardest naturally occurring substance. (i) an inert gas.

3609.

Name (a) a soft metal. (b) a metal which is brittle. (c) a non-metal which is lustrous. (d) a liquid metal. (e) a metal which is a poor conductor of electricity. (f) a non-metal which is a good conductor of electricity. (g) a liquid non-metal. (h) the hardest naturally occurring substance. (i) an inert gas.

Answer»

Name

(a) a soft metal.

(b) a metal which is brittle.

(c) a non-metal which is lustrous.

(d) a liquid metal.

(e) a metal which is a poor conductor of electricity.

(f) a non-metal which is a good conductor of electricity.

(g) a liquid non-metal.

(h) the hardest naturally occurring substance.

(i) an inert gas.

Discussion

3610.	(क) तितली कली के पास कब गई होगी?सुबह दोपहर शाम (ख) तुमने समय का अंदाज़ा कैसे लगाया?
Answer» (क) तितली कली के पास कब गई होगी? सुबह दोपहर शाम (ख) तुमने समय का अंदाज़ा कैसे लगाया?

3610.

(क) तितली कली के पास कब गई होगी?सुबह दोपहर शाम (ख) तुमने समय का अंदाज़ा कैसे लगाया?

Answer»

(क) तितली कली के पास कब गई होगी?

सुबह दोपहर शाम

(ख) तुमने समय का अंदाज़ा कैसे लगाया?

Discussion

3611.	What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?
Answer» What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?

Discussion

3612.	Explain the traditional way of purifying water to make it fit for drinking.
Answer» Explain the traditional way of purifying water to make it fit for drinking.

Discussion

3613.	Addition of Na 2CO3 to a solution of an oxide in water produces CO2. This experimen indicates that: A) the oxide is basic B) the oxide ia amphoteric C) the oxide is that of a metal D) the oxide is that of a non meta
Answer» Addition of Na 2CO3 to a solution of an oxide in water produces CO2. This experimen indicates that: A) the oxide is basic B) the oxide ia amphoteric C) the oxide is that of a metal D) the oxide is that of a non meta

Discussion

3614.	Which of the following salt(s) contains basicity }≥2? (1) }NaH_2PO_3 (2) }Na_2H_2P_2O_5 (3) }Na_2H_2P_2O_7 (4) }NaH_3P_2O_7
Answer» Which of the following salt(s) contains basicity }≥2? (1) }NaH_2PO_3 (2) }Na_2H_2P_2O_5 (3) }Na_2H_2P_2O_7 (4) }NaH_3P_2O_7

Discussion

3615.	21. A single electron in an ion has ionisation energy equal to 217.6eV. What is the total number of neutrons present in one ion of it?
Answer» 21. A single electron in an ion has ionisation energy equal to 217.6eV. What is the total number of neutrons present in one ion of it?

Discussion

3616.	Which of the given options correctly defines the endothermic and exothermic reaction? (i) Reactant(s) + Heat → Product (ii) Reactant(s) → Product + Heat
Answer» Which of the given options correctly defines the endothermic and exothermic reaction? (i) Reactant(s) + Heat $\to$ Product (ii) Reactant(s) $\to$ Product + Heat

3616.

Which of the given options correctly defines the endothermic and exothermic reaction? (i) Reactant(s) + Heat → Product (ii) Reactant(s) → Product + Heat

Answer»

Which of the given options correctly defines the endothermic and exothermic reaction?

(i) Reactant(s) + Heat $\to$ Product

(ii) Reactant(s) $\to$ Product + Heat

Discussion

3617.	What is coalification?
Answer» What is coalification?

Discussion

3618.	Eastern India’s first compressed natural gas (CNG) stations for scooters has launched in which state?
Answer» Eastern India’s first compressed natural gas (CNG) stations for scooters has launched in which state?

Discussion

3619.	Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?
Answer» Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?

Discussion

3620.	for the reaction N2O4 gives 2NO2. 2 moles of N2O4 is taken in 10L flask if 50% of it dissociates at eq find kc
Answer» for the reaction N2O4 gives 2NO2. 2 moles of N2O4 is taken in 10L flask if 50% of it dissociates at eq find kc

Discussion

3621.	Name the metal that melts when held in hands from the given options?
Answer» Name the metal that melts when held in hands from the given options?

Discussion

3622.	A mixture contains X and Y components. X is a solid component that does not dissolve in liquid component Y. How can these components be separated?
Answer» A mixture contains X and Y components. X is a solid component that does not dissolve in liquid component Y. How can these components be separated?

Discussion

3623.	Which amongst the following substance is an alkali?
Answer» Which amongst the following substance is an alkali?

Discussion

3624.	Which of the following statements is the most accurate definition of matter?
Answer» Which of the following statements is the most accurate definition of matter?

Discussion

3625.	Which statement is correct about the following reaction? ZnO + CO→ Zn + CO2
Answer» Which statement is correct about the following reaction? $Z n O$ + $C O \to$ $Z n$ + $C O_{2}$

Discussion

3626.	Which of the following element reacts with cold water vigorously?
Answer» Which of the following element reacts with cold water vigorously?

Discussion

3627.	Explain the statement- ‘we have got this Earth planet on lease from our future generations and not as an ancestral property from our ancestors.’
Answer» Explain the statement- ‘we have got this Earth planet on lease from our future generations and not as an ancestral property from our ancestors.’

Discussion

3628.	Is the reaction of Aluminium with any metal oxide(except iron oxide) during the thermite process exothermic or not ?
Answer» Is the reaction of Aluminium with any metal oxide(except iron oxide) during the thermite process exothermic or not ?

Discussion

3629.	Which of the following metals is refined by electrolytic refining?
Answer» Which of the following metals is refined by electrolytic refining?

Discussion

3630.	Arya should ____ the components of the given mixtures to separate them.
Answer» Arya should ____ the components of the given mixtures to separate them.

Discussion

3631.	119.A 5g piece of ice at -20^°C is put into 10g of water at 30^°C. The final temperature of mixture is 1) 0^°C 2) 10^°C 3) 20^°C 4) 50^°C
Answer» 119.A 5g piece of ice at -20^°C is put into 10g of water at 30^°C. The final temperature of mixture is 1) 0^°C 2) 10^°C 3) 20^°C 4) 50^°C

Discussion

3632.	Arrange the following in ascending order of their atomicity: Oxygen, sulphuric acid and ammonium chloride
Answer» Arrange the following in ascending order of their atomicity: Oxygen, sulphuric acid and ammonium chloride

3632.

Arrange the following in ascending order of their atomicity: Oxygen, sulphuric acid and ammonium chloride

Answer»

Arrange the following in ascending order of their atomicity:

Oxygen, sulphuric acid and ammonium chloride

Discussion

3633.	In which of the following elements does rusting occur?
Answer» In which of the following elements does rusting occur?

3633.

In which of the following elements does rusting occur?

Answer»

In which of the following elements does rusting occur?

Discussion

3634.	What is condition of intermolecular space in plasma(matter) and Bose Einstein condensate?
Answer» What is condition of intermolecular space in plasma(matter) and Bose Einstein condensate?

Discussion

3635.	Why does Hydrogen come in reactivity series even when it is not a metal?
Answer» Why does Hydrogen come in reactivity series even when it is not a metal?

Discussion

3636.	Caustic soda is an absorbent for
Answer» Caustic soda is an absorbent for

Discussion

3637.	Question 6(a) ______ is the property of a material that enables us to see things through it.(b) Which type of object allows us to see things clearly through it. Give an example.(c) Define a translucent object.(d) Name a material that is opaque but it can be made translucent by rubbing it with a little amount of oil.
Answer» Question 6 (a) ______ is the property of a material that enables us to see things through it. (b) Which type of object allows us to see things clearly through it. Give an example. (c) Define a translucent object. (d) Name a material that is opaque but it can be made translucent by rubbing it with a little amount of oil.

3637.

Question 6(a) ______ is the property of a material that enables us to see things through it.(b) Which type of object allows us to see things clearly through it. Give an example.(c) Define a translucent object.(d) Name a material that is opaque but it can be made translucent by rubbing it with a little amount of oil.

Answer»

Question 6

(a) ______ is the property of a material that enables us to see things through it.

(b) Which type of object allows us to see things clearly through it. Give an example.

(c) Define a translucent object.

(d) Name a material that is opaque but it can be made translucent by rubbing it with a little amount of oil.

Discussion

3638.	An organic compound on analysis gave the following data :C = 57.82%, H = 3.6%, and 38.58% is oxygen. Find its emperical formula .
Answer» An organic compound on analysis gave the following data :C = 57.82%, H = 3.6%, and 38.58% is oxygen. Find its emperical formula .

Discussion

3639.	The hardness of solids is due to the fact that their particles:
Answer» The hardness of solids is due to the fact that their particles:

Discussion

3640.	explain polarisation ?
Answer» explain polarisation ?

Discussion

3641.	Roasting is defined as:
Answer» Roasting is defined as:

Discussion

3642.	Which of the following reaction(s) involves absorption of light to initiate?
Answer» Which of the following reaction(s) involves absorption of light to initiate?

Discussion

3643.	Which of the following is an exception to the non-conducting property of non-metals?
Answer» Which of the following is an exception to the non-conducting property of non-metals?

3643.

Which of the following is an exception to the non-conducting property of non-metals?

Answer»

Which of the following is an exception to the non-conducting property of non-metals?

Discussion

3644.	Question 1 (e)Classify the following as chemical or physical changes: e. Passing of electric current, through water and the water breaking down into hydrogen and oxygen gases
Answer» Question 1 (e) Classify the following as chemical or physical changes: e. Passing of electric current, through water and the water breaking down into hydrogen and oxygen gases

Discussion

3645.	A solution contains 30 g of sugar dissolved in 300 g of water. Calculate the concentration of this solution in terms of mass by mass percentage.
Answer» A solution contains 30 g of sugar dissolved in 300 g of water. Calculate the concentration of this solution in terms of mass by mass percentage.

Discussion

3646.	A boy of mass 40 kg is hanging from a horizontal branch of a tree. The tension in his arms is minimum when the angle between the arms is1) 0°2) 90°3) 120°4) 180°
Answer» A boy of mass 40 kg is hanging from a horizontal branch of a tree. The tension in his arms is minimum when the angle between the arms is 1) 0° 2) 90° 3) 120° 4) 180°

Discussion

3647.	Which is a better fuel−coal or coke? Why?
Answer» Which is a better fuel−coal or coke? Why?

Discussion

3648.	Identify the type of reaction when dilute hydrochloric acid is added to iron filings.
Answer» Identify the type of reaction when dilute hydrochloric acid is added to iron filings.

Discussion

3649.	1. Oxidation of primary alcohols and secondary alcohols using Jone's Reagent and Collin's Reagent
Answer» 1. Oxidation of primary alcohols and secondary alcohols using Jone's Reagent and Collin's Reagent

Discussion

3650.	Give reason.Water is not used to control fires involving electrical equipment.
Answer» Give reason. Water is not used to control fires involving electrical equipment.

Discussion

Explore topic-wise InterviewSolutions in .

What chemical will be needed to test the presence of ionic contamination \((SO_4, Cl^-, S_2^-, HS^+) in different sample of water.

The efficiency of an ideal heat engine workingbetween the freezing point and boiling point ofwater, is(1) 26.8%(3) 12.5%(2) 20%(4) 6.25%

Which of the following is/are greenhouse gas(es)?

What are the ways by which a chemical equation can be made more informative ?

Impure water can be purified by the process of ___________ .

The anionic unit of ortho silicates is:

Suppose that A and B from the compound B2A3 and B2A.if 0.05 mole of B2A3 weight 9g and 0.1 mole of B2A WEIGHTS 10g the atomic of A and B respectively are

8. In acrystalline solid , X atoms occupy HCP and 1/4 of tetrahedral voids are occupied byY atoms . then the empirical formula of the crystallie solid is - 1. X2Y 2. XY2 3.X4Y 4. XY

(क) तितली कली के पास कब गई होगी?सुबह दोपहर शाम (ख) तुमने समय का अंदाज़ा कैसे लगाया?

What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?

Explain the traditional way of purifying water to make it fit for drinking.

Addition of Na 2CO3 to a solution of an oxide in water produces CO2. This experimen indicates that: A) the oxide is basic B) the oxide ia amphoteric C) the oxide is that of a metal D) the oxide is that of a non meta

Which of the following salt(s) contains basicity }≥2? (1) }NaH_2PO_3 (2) }Na_2H_2P_2O_5 (3) }Na_2H_2P_2O_7 (4) }NaH_3P_2O_7

21. A single electron in an ion has ionisation energy equal to 217.6eV. What is the total number of neutrons present in one ion of it?

Which of the given options correctly defines the endothermic and exothermic reaction? (i) Reactant(s) + Heat → Product (ii) Reactant(s) → Product + Heat

What is coalification?

Eastern India’s first compressed natural gas (CNG) stations for scooters has launched in which state?

Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?

for the reaction N2O4 gives 2NO2. 2 moles of N2O4 is taken in 10L flask if 50% of it dissociates at eq find kc

Name the metal that melts when held in hands from the given options?

A mixture contains X and Y components. X is a solid component that does not dissolve in liquid component Y. How can these components be separated?

Which amongst the following substance is an alkali?

Which of the following statements is the most accurate definition of matter?

Which statement is correct about the following reaction? ZnO + CO→ Zn + CO2

Which of the following element reacts with cold water vigorously?

Explain the statement- ‘we have got this Earth planet on lease from our future generations and not as an ancestral property from our ancestors.’

Is the reaction of Aluminium with any metal oxide(except iron oxide) during the thermite process exothermic or not ?

Which of the following metals is refined by electrolytic refining?

Arya should ____ the components of the given mixtures to separate them.

119.A 5g piece of ice at -20^°C is put into 10g of water at 30^°C. The final temperature of mixture is 1) 0^°C 2) 10^°C 3) 20^°C 4) 50^°C

Arrange the following in ascending order of their atomicity: Oxygen, sulphuric acid and ammonium chloride

In which of the following elements does rusting occur?

What is condition of intermolecular space in plasma(matter) and Bose Einstein condensate?

Why does Hydrogen come in reactivity series even when it is not a metal?

Caustic soda is an absorbent for

An organic compound on analysis gave the following data :C = 57.82%, H = 3.6%, and 38.58% is oxygen. Find its emperical formula .

The hardness of solids is due to the fact that their particles:

explain polarisation ?

Roasting is defined as:

Which of the following reaction(s) involves absorption of light to initiate?

Which of the following is an exception to the non-conducting property of non-metals?

Question 1 (e)Classify the following as chemical or physical changes: e. Passing of electric current, through water and the water breaking down into hydrogen and oxygen gases

A solution contains 30 g of sugar dissolved in 300 g of water. Calculate the concentration of this solution in terms of mass by mass percentage.

A boy of mass 40 kg is hanging from a horizontal branch of a tree. The tension in his arms is minimum when the angle between the arms is1) 0°2) 90°3) 120°4) 180°

Which is a better fuel−coal or coke? Why?

Identify the type of reaction when dilute hydrochloric acid is added to iron filings.

1. Oxidation of primary alcohols and secondary alcohols using Jone's Reagent and Collin's Reagent

Give reason.Water is not used to control fires involving electrical equipment.