10223 + Interview Questions in Chemistry Page 159 InterviewSolution

7901.	The temperature at which Celsius and Fahrenheit scales show the same reading is :-
Answer» The temperature at which Celsius and Fahrenheit scales show the same reading is :-

Discussion

7902.	How can an element attain stability?
Answer» How can an element attain stability?

Discussion

7903.	There are few elements which have least combining effect and they also have least chemical reactivity. Identify this type of element from the given options:
Answer» There are few elements which have least combining effect and they also have least chemical reactivity. Identify this type of element from the given options:

Discussion

7904.	In a neutral atom the number of .......... is equal to the number of electrons.
Answer» In a neutral atom the number of .......... is equal to the number of electrons.

Discussion

7905.	Which subatomic particle is not present in an ordinary hydrogen atom?
Answer» Which subatomic particle is not present in an ordinary hydrogen atom?

Discussion

7906.	Copper sulphate on treatment with potassium iodide precipitates cuprous iodide, liberates iodine gas and also forms potassium sulphate. Write a balanced equation for the mentioned reaction.
Answer» Copper sulphate on treatment with potassium iodide precipitates cuprous iodide, liberates iodine gas and also forms potassium sulphate. Write a balanced equation for the mentioned reaction.

Discussion

7907.	Copper sulphate reacts with sodium hydroxide to form a blue precipitate of copper hydroxide and sodium sulphate. In an experiment, 15.95 g of copper sulphate reacted with 8.0 g of sodium hydroxide to form 9.75 g of copper hydroxide and 14.2 g of sodium sulphate. Which law of chemical combination is illustrated by this data?
Answer» Copper sulphate reacts with sodium hydroxide to form a blue precipitate of copper hydroxide and sodium sulphate. In an experiment, 15.95 g of copper sulphate reacted with 8.0 g of sodium hydroxide to form 9.75 g of copper hydroxide and 14.2 g of sodium sulphate. Which law of chemical combination is illustrated by this data?

Discussion

7908.	Acetylene decomposes into carbon and hydrogen when subjected to ___ .
Answer» Acetylene decomposes into carbon and hydrogen when subjected to ___ .

Discussion

7909.	What is meant by saying that 'the molecular mass of oxygen is 32' ?
Answer» What is meant by saying that 'the molecular mass of oxygen is 32' ?

Discussion

7910.	What is the ability of each atom to attract shared electron pairs towards itself?
Answer» What is the ability of each atom to attract shared electron pairs towards itself?

Discussion

7911.	Write the full forms of the following : (a) LPG (b) CNG
Answer» Write the full forms of the following : (a) LPG (b) CNG

7911.

Write the full forms of the following : (a) LPG (b) CNG

Answer»

Write the full forms of the following :

(a) LPG

(b) CNG

Discussion

7912.	5B10 + 2He4 → X + 0n1 'X' in the above reaction is
Answer» $_{5} B^{10}$ + $_{2} H e^{4}$ $\to$ X + $_{0} n^{1}$ 'X' in the above reaction is

7912.

5B10 + 2He4 → X + 0n1 'X' in the above reaction is

Answer»

$_{5} B^{10}$ + $_{2} H e^{4}$ $\to$ X + $_{0} n^{1}$

'X' in the above reaction is

Discussion

7913.	Which of the following statements are correct regarding the process of electrolysis of water?
Answer» Which of the following statements are correct regarding the process of electrolysis of water?

Discussion

7914.	If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the mass of one atom of oxygen.
Answer» If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the mass of one atom of oxygen.

Discussion

7915.	Give 5 examples each for : (a) Aerosol (b) Emulsion
Answer» Give 5 examples each for : (a) Aerosol (b) Emulsion

7915.

Give 5 examples each for : (a) Aerosol (b) Emulsion

Answer»

Give 5 examples each for :

(a) Aerosol

(b) Emulsion

Discussion

7916.	Why can't gas cylinder half filled?? not from Google please
Answer» Why can't gas cylinder half filled?? not from Google please

Discussion

7917.	Barium hydroxide and ammonium chloride is mixed.Is this reaction a exothermic or endothermic reaction?
Answer» Barium hydroxide and ammonium chloride is mixed.Is this reaction a exothermic or endothermic reaction?

Discussion

7918.	Why we use X-ray source in Milikan's oil drop experiment apparatus,what's importance of that?
Answer» Why we use X-ray source in Milikan's oil drop experiment apparatus,what's importance of that?

Discussion

7919.	How many molecules of water are there in 36g water
Answer» How many molecules of water are there in 36g water

Discussion

7920.	The elements in the Dobereiner's Triads follow: -
Answer» The elements in the Dobereiner's Triads follow: -

Discussion

7921.	Why is heat given out when a vapour condenses into a liquid ?
Answer» Why is heat given out when a vapour condenses into a liquid ?

Discussion

7922.	Match the following gas laws in column I with the equation representing them in column II (i)Boyle′s lawf)(a)Vproportional to n at constant T and p(ii)Charles law(b)Ptotal=P1+P2+P3+−−−−−at constant T,V(iii)Daltons law(c)PVT=constant(iv)Avogadro′s law(d)Proportional T at constant n and p(e)Pproportional to 1v at constant T
Answer» Match the following gas laws in column I with the equation representing them in column II $\begin{matrix} (i) B o y l e^{'} s l a w f) & (a) V p r o p o r t i o n a l t o n a t c o n s t a n t T a n d p (i i) C h a r l e s l a w & (b) P_{t o t a l} = P_{1} + P_{2} + P_{3} + - - - - - a t c o n s t a n t T, V (i i i) D a l t o n s l a w & (c) \frac{P V}{T} = c o n s t a n t (i v) A v o g a d r o^{'} s l a w & (d) P r o p o r t i o n a l T a t c o n s t a n t n a n d p (e) P p r o p o r t i o n a l t o \frac{1}{v} a t c o n s t a n t T \end{matrix}$

7922.

Match the following gas laws in column I with the equation representing them in column II (i)Boyle′s lawf)(a)Vproportional to n at constant T and p(ii)Charles law(b)Ptotal=P1+P2+P3+−−−−−at constant T,V(iii)Daltons law(c)PVT=constant(iv)Avogadro′s law(d)Proportional T at constant n and p(e)Pproportional to 1v at constant T

Answer»

Match the following gas laws in column I with the equation representing them in column II

$\begin{matrix} (i) B o y l e^{'} s l a w f) & (a) V p r o p o r t i o n a l t o n a t c o n s t a n t T a n d p (i i) C h a r l e s l a w & (b) P_{t o t a l} = P_{1} + P_{2} + P_{3} + - - - - - a t c o n s t a n t T, V (i i i) D a l t o n s l a w & (c) \frac{P V}{T} = c o n s t a n t (i v) A v o g a d r o^{'} s l a w & (d) P r o p o r t i o n a l T a t c o n s t a n t n a n d p (e) P p r o p o r t i o n a l t o \frac{1}{v} a t c o n s t a n t T \end{matrix}$

Discussion

7923.	How many Ammonium ions are present in Ammonium sulphate?
Answer» How many Ammonium ions are present in Ammonium sulphate?

Discussion

7924.	Explain in detail the process of sublimation.
Answer» Explain in detail the process of sublimation.

Discussion

7925.	Consider an atom of manganese, represented as 25Mn55 Give the number of : (i) Electron (ii) protons (iii) nucleons present in the atom.
Answer» Consider an atom of manganese, represented as $_{25} M n^{55}$ Give the number of : (i) Electron (ii) protons (iii) nucleons present in the atom.

7925.

Consider an atom of manganese, represented as 25Mn55 Give the number of : (i) Electron (ii) protons (iii) nucleons present in the atom.

Answer»

Consider an atom of manganese, represented as $_{25} M n^{55}$ Give the number of :

(i) Electron (ii) protons (iii) nucleons present in the atom.

Discussion

7926.	Which of the following do not take part in chemical reaction but help in carrying out the reaction faster.
Answer» Which of the following do not take part in chemical reaction but help in carrying out the reaction faster.

Discussion

7927.	Write an activity to show that matter is particulate in nature
Answer» Write an activity to show that matter is particulate in nature

Discussion

7928.	How to find out vallency.
Answer» How to find out vallency.

Discussion

7929.	To make a saturated solution 30 g of sodium chloride is dissolved in 100 g of water at 293K. Find its concentration at this temperature.
Answer» To make a saturated solution 30 g of sodium chloride is dissolved in 100 g of water at 293K. Find its concentration at this temperature.

Discussion

7930.	A 8.3 L cylinder contains 128.0 g of O2 gas at 27∘C. What mass of O2 gas must be released to reduce the pressure to 6.0 bar?
Answer» A $8.3 L$ cylinder contains $128.0 g$ of $O_{2}$ gas at $27^{\circ} C$ . What mass of $O_{2}$ gas must be released to reduce the pressure to 6.0 bar?

Discussion

7931.	In which of the following compounds manganese show maximum radius -
Answer» In which of the following compounds manganese show maximum radius -

Discussion

7932.	Among the given options, what crystals are used for the preparation of oxygen in the classroom?
Answer» Among the given options, what crystals are used for the preparation of oxygen in the classroom?

Discussion

7933.	Which of the following group follows Dobereiner's law of triads?
Answer» Which of the following group follows Dobereiner's law of triads?

Discussion

7934.	Which of the following contains less solute at a given temperature and pressure? Unsaturated solution or Saturated solution.
Answer» Which of the following contains less solute at a given temperature and pressure? Unsaturated solution or Saturated solution.

7934.

Which of the following contains less solute at a given temperature and pressure? Unsaturated solution or Saturated solution.

Answer»

Which of the following contains less solute at a given temperature and pressure?

Unsaturated solution or Saturated solution.

Discussion

7935.	Find out the appropriate word which fits the 10th blank.
Answer» Find out the appropriate word which fits the 10th blank.

Discussion

7936.	The interconversion of states of matter is:
Answer» The interconversion of states of matter is:

Discussion

7937.	Stete (i) the three variables for gas laws (ii) S.I. units of these variables.
Answer» Stete (i) the three variables for gas laws (ii) S.I. units of these variables.

Discussion

7938.	Question 1(iv) Give an example of a metal which is a poor conductor of heat.
Answer» Question 1(iv) Give an example of a metal which is a poor conductor of heat.

Discussion

7939.	Question 18 Which of the following are combination reactions? (i) 2KClO3Heat→2KCl+3O2 (ii) MgO+H2O→Mg(OH)2 (iii) 4Al+3O2→2Al2O3 (iv) Zn+FeSO4→ZnSO4+Fe (a) (i) and (iii) (b) (iii) and (iv) (c) (ii) and (iv) (d) (ii) and (iii)
Answer» Question 18 Which of the following are combination reactions? (i) $2 {KClO}_{3} Heat \to 2 KCl + 3 O_{2}$ (ii) $MgO + H_{2} O \to {Mg(OH)}_{2}$ (iii) $4 Al + 3 O_{2} \to 2 {Al}_{2} O_{3}$ (iv) $Zn + {FeSO}_{4} \to {ZnSO}_{4} + Fe$ (a) (i) and (iii) (b) (iii) and (iv) (c) (ii) and (iv) (d) (ii) and (iii)

Discussion

7940.	Question 1 Which of the following statements is not a correct statement about the trends when going from left to right across the periods of the periodic table? 1. The elements become less metallic in nature. 2. The number of valence electrons increases. 3. The atoms lose their electrons more easily. 4. The oxides become more acidic.
Answer» Question 1 Which of the following statements is not a correct statement about the trends when going from left to right across the periods of the periodic table? 1. The elements become less metallic in nature. 2. The number of valence electrons increases. 3. The atoms lose their electrons more easily. 4. The oxides become more acidic.

Discussion

7941.	Open-chain saturated hydrocarbons are called
Answer» Open-chain saturated hydrocarbons are called

Discussion

7942.	Question 5 Which of the following statements about Rutherford's model of atom are correct? (i) Considered the nucleus as positively charged. (ii) Established that the a-particles are four times as heavy as a hydrogen atom. (iii) Can be compared to solar system. (iv) Was in agreement with Thomson's model. (a) (i) and (iii) (b) (ii) and (iii) (c) (i) and (iv) (d) only (i)
Answer» Question 5 Which of the following statements about Rutherford's model of atom are correct? (i) Considered the nucleus as positively charged. (ii) Established that the a-particles are four times as heavy as a hydrogen atom. (iii) Can be compared to solar system. (iv) Was in agreement with Thomson's model. (a) (i) and (iii) (b) (ii) and (iii) (c) (i) and (iv) (d) only (i)

Discussion

7943.	Question 31 Although metals form basic oxides, which of the following metals form an amphoteric oxide? a) Na (b) Ca (c) Al (d) Cu
Answer» Question 31 Although metals form basic oxides, which of the following metals form an amphoteric oxide? a) $Na$ (b) $Ca$ (c) $Al$ (d) $Cu$

Discussion

7944.	Name the drying agent used in the lab during the preparation of a gas, formed by the reaction of sodium chloride and sulphuric acid?
Answer» Name the drying agent used in the lab during the preparation of a gas, formed by the reaction of sodium chloride and sulphuric acid?

Discussion

7945.	What is the role of concentrated H2SO4 in the laboratory preparation of nitric acid?
Answer» What is the role of concentrated $H_{2} S O_{4}$ in the laboratory preparation of nitric acid?

Discussion

7946.	Which of the following is not applicable for softening hard water?
Answer» Which of the following is not applicable for softening hard water?

Discussion

7947.	Where is BEC found?
Answer» Where is BEC found?

Discussion

7948.	Why solutions do not exhibit Tyndall effect?
Answer» Why solutions do not exhibit Tyndall effect?

Discussion

7949.	Which contains more heat, 1 Kg of ice at 0∘C or 1 Kg of water at 0∘C? Give reson for your answer.
Answer» Which contains more heat, 1 Kg of ice at $0^{\circ}$ C or 1 Kg of water at $0^{\circ}$ C? Give reson for your answer.

Discussion

7950.	The combining capacity of an element is known as its ______________.
Answer» The combining capacity of an element is known as its ______________.

Discussion

Explore topic-wise InterviewSolutions in .

The temperature at which Celsius and Fahrenheit scales show the same reading is :-

How can an element attain stability?

There are few elements which have least combining effect and they also have least chemical reactivity. Identify this type of element from the given options:

In a neutral atom the number of .......... is equal to the number of electrons.

Which subatomic particle is not present in an ordinary hydrogen atom?

Copper sulphate on treatment with potassium iodide precipitates cuprous iodide, liberates iodine gas and also forms potassium sulphate. Write a balanced equation for the mentioned reaction.

Acetylene decomposes into carbon and hydrogen when subjected to ___ .

What is meant by saying that 'the molecular mass of oxygen is 32' ?

What is the ability of each atom to attract shared electron pairs towards itself?

Write the full forms of the following : (a) LPG (b) CNG

5B10 + 2He4 → X + 0n1 'X' in the above reaction is

Which of the following statements are correct regarding the process of electrolysis of water?

If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the mass of one atom of oxygen.

Give 5 examples each for : (a) Aerosol (b) Emulsion

Why can't gas cylinder half filled?? not from Google please

Barium hydroxide and ammonium chloride is mixed.Is this reaction a exothermic or endothermic reaction?

Why we use X-ray source in Milikan's oil drop experiment apparatus,what's importance of that?

How many molecules of water are there in 36g water

The elements in the Dobereiner's Triads follow: -

Why is heat given out when a vapour condenses into a liquid ?

How many Ammonium ions are present in Ammonium sulphate?

Explain in detail the process of sublimation.

Consider an atom of manganese, represented as 25Mn55 Give the number of : (i) Electron (ii) protons (iii) nucleons present in the atom.

Which of the following do not take part in chemical reaction but help in carrying out the reaction faster.

Write an activity to show that matter is particulate in nature

How to find out vallency.

To make a saturated solution 30 g of sodium chloride is dissolved in 100 g of water at 293K. Find its concentration at this temperature.

A 8.3 L cylinder contains 128.0 g of O2 gas at 27∘C. What mass of O2 gas must be released to reduce the pressure to 6.0 bar?

In which of the following compounds manganese show maximum radius -

Among the given options, what crystals are used for the preparation of oxygen in the classroom?

Which of the following group follows Dobereiner's law of triads?

Which of the following contains less solute at a given temperature and pressure? Unsaturated solution or Saturated solution.

Find out the appropriate word which fits the 10th blank.

The interconversion of states of matter is:

Stete (i) the three variables for gas laws (ii) S.I. units of these variables.

Question 1(iv) Give an example of a metal which is a poor conductor of heat.

Question 18 Which of the following are combination reactions? (i) 2KClO3Heat→2KCl+3O2 (ii) MgO+H2O→Mg(OH)2 (iii) 4Al+3O2→2Al2O3 (iv) Zn+FeSO4→ZnSO4+Fe (a) (i) and (iii) (b) (iii) and (iv) (c) (ii) and (iv) (d) (ii) and (iii)

Open-chain saturated hydrocarbons are called

Question 31 Although metals form basic oxides, which of the following metals form an amphoteric oxide? a) Na (b) Ca (c) Al (d) Cu

Name the drying agent used in the lab during the preparation of a gas, formed by the reaction of sodium chloride and sulphuric acid?

What is the role of concentrated H2SO4 in the laboratory preparation of nitric acid?

Which of the following is not applicable for softening hard water?

Where is BEC found?

Why solutions do not exhibit Tyndall effect?

Which contains more heat, 1 Kg of ice at 0∘C or 1 Kg of water at 0∘C? Give reson for your answer.

The combining capacity of an element is known as its ______________.