10223 + Interview Questions in Chemistry Page 151 InterviewSolution

7501.	How can we control carbon monoxide poisoning ?
Answer» How can we control carbon monoxide poisoning ?

Discussion

7502.	Which of the following statements is true with respect to 3d series?
Answer» Which of the following statements is true with respect to 3d series?

Discussion

7503.	Atoms of ___ elements that have 1, 2 or 3 valence elelctrons can lose electrons to atoms of ___ elements which have 5, 6 or 7 electrons, thereby forming an electrovalent compound.
Answer» Atoms of ___ elements that have 1, 2 or 3 valence elelctrons can lose electrons to atoms of ___ elements which have 5, 6 or 7 electrons, thereby forming an electrovalent compound.

Discussion

7504.	What is the difference between molecular compound and ionic compound please explain it clearly.
Answer» What is the difference between molecular compound and ionic compound please explain it clearly.

Discussion

7505.	When water evaporates we feel cool but,when and acid evaporates it doesn't gives a cooling sensation ?
Answer» When water evaporates we feel cool but,when and acid evaporates it doesn't gives a cooling sensation ?

Discussion

7506.	When we think of heat, we always think of the temperature changing. But is this always the case? This is just one 'type' of heat called 'sensible heat'. The heat could also be utilized in changing phase, from liquid to vapour. This is called latent heat. Armed with all this info, can you crack this one; which of the following is eating up most your electricity bill while running the AC during a humid monsoon day in Hawaii?
Answer» When we think of heat, we always think of the temperature changing. But is this always the case? This is just one 'type' of heat called 'sensible heat'. The heat could also be utilized in changing phase, from liquid to vapour. This is called latent heat. Armed with all this info, can you crack this one; which of the following is eating up most your electricity bill while running the AC during a humid monsoon day in Hawaii?

7506.

When we think of heat, we always think of the temperature changing. But is this always the case? This is just one 'type' of heat called 'sensible heat'. The heat could also be utilized in changing phase, from liquid to vapour. This is called latent heat. Armed with all this info, can you crack this one; which of the following is eating up most your electricity bill while running the AC during a humid monsoon day in Hawaii?

Answer»

When we think of heat, we always think of the temperature changing. But is this always the case? This is just one 'type' of heat called 'sensible heat'. The heat could also be utilized in changing phase, from liquid to vapour. This is called latent heat.

Armed with all this info, can you crack this one; which of the following is eating up most your electricity bill while running the AC during a humid monsoon day in Hawaii?

Discussion

7507.	State any 10 difference s between atoms,molecules and ions?
Answer» State any 10 difference s between atoms,molecules and ions?

Discussion

7508.	Property of alkaline earth metals that increases with their atomic number
Answer» Property of alkaline earth metals that increases with their atomic number

Discussion

7509.	why steam causes severe burn than boiling water
Answer» why steam causes severe burn than boiling water

Discussion

7510.	What is a combination reaction?
Answer» What is a combination reaction?

Discussion

7511.	Which of the following pictures represent the plum pudding model of an atom?
Answer» Which of the following pictures represent the plum pudding model of an atom?

7511.

Which of the following pictures represent the plum pudding model of an atom?

Answer»

Which of the following pictures represent the plum pudding model of an atom?

Discussion

7512.	Which of the following is an example of diatomic molecule?
Answer» Which of the following is an example of diatomic molecule?

Discussion

7513.	Which of the following properties is not applicable to pure substances?
Answer» Which of the following properties is not applicable to pure substances?

Discussion

7514.	NaCl molecule is made of which of the following ions?
Answer» NaCl molecule is made of which of the following ions?

Discussion

7515.	Apart from carbon, hydrogen and oxygen, our body needs ___ also.
Answer» Apart from carbon, hydrogen and oxygen, our body needs ___ also.

Discussion

7516.	The law of conservation of mass was given by:
Answer» The law of conservation of mass was given by:

Discussion

7517.	What would be the mass of Z formed when, 5 g of X reacts with 6 g of Y? X+Y→Z11
Answer» What would be the mass of Z formed when, 5 g of X reacts with 6 g of Y? X+Y→Z 11

Discussion

7518.	The boiling point of alcohol is 78∘C. What is this temperature on Kelvin scale?
Answer» The boiling point of alcohol is $78^{\circ}$ C. What is this temperature on Kelvin scale?

Discussion

7519.	How could the modern periodic table remove various anomalies of Mendleev‘s periodic table? [3 MARKS]
Answer» How could the modern periodic table remove various anomalies of Mendleev‘s periodic table? [3 MARKS]

Discussion

7520.	Write the full form of IUPAC.
Answer» Write the full form of IUPAC.

Discussion

7521.	Question 13 Write the molecular formulae of all the compounds that can be formed by the combination of following ions Cu2+,Na+,Fe3+,Cl−,SO24,PO3−4
Answer» Question 13 Write the molecular formulae of all the compounds that can be formed by the combination of following ions $C u^{2 +}, N a^{+}, F e^{3 +}, C l^{-}, S O_{4}^{2}, P O_{4}^{3 -}$

Discussion

7522.	What ionisation enthalpy mean?
Answer» What ionisation enthalpy mean?

Discussion

7523.	The molarity of NaNO3 is1 M. The density of solution is 1.25g/ml. Calculate molality of solution. Molar mass of NaNO3= 85g
Answer» The molarity of NaNO3 is1 M. The density of solution is 1.25g/ml. Calculate molality of solution. Molar mass of NaNO3= 85g

Discussion

7524.	Describe an experiment to show that gases do not have a fixed shape and volume.
Answer» Describe an experiment to show that gases do not have a fixed shape and volume.

Discussion

7525.	Which is the smallest unit of matter? Atom or particle?
Answer» Which is the smallest unit of matter? Atom or particle?

Discussion

7526.	What is the chemical and electrical stability in an atom?
Answer» What is the chemical and electrical stability in an atom?

Discussion

7527.	1atm = ___.
Answer» 1atm = ___.

Discussion

7528.	Covalent compounds are generally ___ in water.
Answer» Covalent compounds are generally ___ in water.

Discussion

7529.	According to the law of conservation of mass, what would be the number of H2 molecule in N2+H2→NH3 ?
Answer» According to the law of conservation of mass, what would be the number of $H_{2}$ molecule in $N_{2} + H_{2} \to N H_{3}$ ?

Discussion

7530.	Question 50 (a) An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound ammonia which has a characteristic pungent smell. Identify the element X. How many valence electrons does it have?
Answer» Question 50 (a) An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound ammonia which has a characteristic pungent smell. Identify the element X. How many valence electrons does it have?

Discussion

7531.	Soil is formed by water. Do you agree with the statement? Justify giving reasons.
Answer» Soil is formed by water. Do you agree with the statement? Justify giving reasons.

Discussion

7532.	Question 58 A solution of CuSO4 was kept in an iron pot. After a few days, the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.
Answer» Question 58 A solution of ${CuSO}_{4}$ was kept in an iron pot. After a few days, the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.

Discussion

7533.	The boiling point of a liquid _______ by the addition of impurities to it.
Answer» The boiling point of a liquid _______ by the addition of impurities to it.

Discussion

7534.	Cl2 + 2NaOH → NaCl + A–– + H2O to form. A is (Cold & dilute)
Answer» $C l_{2} + 2 N a O H \to N a C l + A - - + H_{2} O$ to form. A is (Cold & dilute)

7534.

Cl2 + 2NaOH → NaCl + A–– + H2O to form. A is (Cold & dilute)

Answer»

$C l_{2} + 2 N a O H \to N a C l + A - - + H_{2} O$ to form. A is

(Cold & dilute)

Discussion

7535.	Can water boil at -10 degree celcius or -20 degree celcius.Explain how and why?
Answer» Can water boil at -10 degree celcius or -20 degree celcius.Explain how and why?

Discussion

7536.	In the reaction 2Ag + 2H2SO4→Ag2SO4 + 2H2O + SO2 sulphuric acid acts as
Answer» In the reaction $2 A g + 2 H_{2} S O_{4} \to A g_{2} S O_{4} + 2 H_{2} O + S O_{2}$ sulphuric acid acts as

Discussion

7537.	Which of the following is the structure of C6H12?
Answer» Which of the following is the structure of $C_{6} H_{12}$ ?

Discussion

7538.	State whether the following statement is true or false : Solid carbon dioxide is stored under low pressure.
Answer» State whether the following statement is true or false : Solid carbon dioxide is stored under low pressure.

7538.

State whether the following statement is true or false : Solid carbon dioxide is stored under low pressure.

Answer»

State whether the following statement is true or false :

Solid carbon dioxide is stored under low pressure.

Discussion

7539.	Do atoms have independent existence as like molecules?
Answer» Do atoms have independent existence as like molecules?

Discussion

7540.	Fe +S =Fes. Calculate the mass in g of iron sulphide formed when 28g of iron combines with 16g of sulphur.
Answer» Fe +S =Fes. Calculate the mass in g of iron sulphide formed when 28g of iron combines with 16g of sulphur.

Discussion

7541.	Calculate the % composition of each element present in monosodium phosphate. Na = , H = , P = and O = .
Answer» Calculate the % composition of each element present in monosodium phosphate. Na = , H = , P = and O = .

Discussion

7542.	Which of the following statements are correct I. Both LiCl and MgCl2 are soluble in ethanol II. Both LiCl and MgCl2 are deliquescent III. LiCl and MgCl2 form hydrates like LiCl.8H2O and MgCl2.2H2O IV. NaHCO3 used as fire extinguisher
Answer» Which of the following statements are correct I. Both $L i C l$ and $M g C l_{2}$ are soluble in ethanol II. Both $L i C l$ and $M g C l_{2}$ are deliquescent III. $L i C l$ and $M g C l_{2}$ form hydrates like $L i C l .8 H_{2} O$ and $M g C l_{2} .2 H_{2} O$ IV. $N a H C O_{3}$ used as fire extinguisher

7542.

Which of the following statements are correct I. Both LiCl and MgCl2 are soluble in ethanol II. Both LiCl and MgCl2 are deliquescent III. LiCl and MgCl2 form hydrates like LiCl.8H2O and MgCl2.2H2O IV. NaHCO3 used as fire extinguisher

Answer»

Which of the following statements are correct

I. Both $L i C l$ and $M g C l_{2}$ are soluble in ethanol

II. Both $L i C l$ and $M g C l_{2}$ are deliquescent

III. $L i C l$ and $M g C l_{2}$ form hydrates like $L i C l .8 H_{2} O$ and $M g C l_{2} .2 H_{2} O$

IV. $N a H C O_{3}$ used as fire extinguisher

Discussion

7543.	When dissolved in water, Arrhenius base is a compound that:
Answer» When dissolved in water, Arrhenius base is a compound that:

Discussion

7544.	What is the major difference between a solution and an ordinary mixture?
Answer» What is the major difference between a solution and an ordinary mixture?

Discussion

7545.	The catalyst used to reduce the decomposition of hydrogen peroxide is
Answer» The catalyst used to reduce the decomposition of hydrogen peroxide is

Discussion

7546.	Name A, B, C, D, E and F in the following diagram showing changes in its state
Answer» Name A, B, C, D, E and F in the following diagram showing changes in its state

Discussion

7547.	An element has two isotopes with atomic masses 17 and 18, occurring in the nature in ratio 1:1. What is the atomic weight of the element?
Answer» An element has two isotopes with atomic masses 17 and 18, occurring in the nature in ratio 1:1. What is the atomic weight of the element?

Discussion

7548.	What is cation? [1 MARK]
Answer» What is cation? [1 MARK]

Discussion

7549.	A popular metal X reacts with oxygen gas to give an amphoteric oxide. Identify the metal X. Recall that amphoteric oxide show both acidic and basic behaviour. X+O2→Amphoteric Oxide
Answer» A popular metal X reacts with oxygen gas to give an amphoteric oxide. Identify the metal X. Recall that amphoteric oxide show both acidic and basic behaviour. $X + O_{2} \to Amphoteric Oxide$

Discussion

7550.	Why does our hand feel cold when we pour some spirit on it?
Answer» Why does our hand feel cold when we pour some spirit on it?

Discussion

Explore topic-wise InterviewSolutions in .

How can we control carbon monoxide poisoning ?

Which of the following statements is true with respect to 3d series?

Atoms of ___ elements that have 1, 2 or 3 valence elelctrons can lose electrons to atoms of ___ elements which have 5, 6 or 7 electrons, thereby forming an electrovalent compound.

What is the difference between molecular compound and ionic compound please explain it clearly.

When water evaporates we feel cool but,when and acid evaporates it doesn't gives a cooling sensation ?

State any 10 difference s between atoms,molecules and ions?

Property of alkaline earth metals that increases with their atomic number

why steam causes severe burn than boiling water

What is a combination reaction?

Which of the following pictures represent the plum pudding model of an atom?

Which of the following is an example of diatomic molecule?

Which of the following properties is not applicable to pure substances?

NaCl molecule is made of which of the following ions?

Apart from carbon, hydrogen and oxygen, our body needs ___ also.

The law of conservation of mass was given by:

What would be the mass of Z formed when, 5 g of X reacts with 6 g of Y? X+Y→Z11

The boiling point of alcohol is 78∘C. What is this temperature on Kelvin scale?

How could the modern periodic table remove various anomalies of Mendleev‘s periodic table? [3 MARKS]

Write the full form of IUPAC.

Question 13 Write the molecular formulae of all the compounds that can be formed by the combination of following ions Cu2+,Na+,Fe3+,Cl−,SO24,PO3−4

What ionisation enthalpy mean?

The molarity of NaNO3 is1 M. The density of solution is 1.25g/ml. Calculate molality of solution. Molar mass of NaNO3= 85g

Describe an experiment to show that gases do not have a fixed shape and volume.

Which is the smallest unit of matter? Atom or particle?

What is the chemical and electrical stability in an atom?

1atm = ___.

Covalent compounds are generally ___ in water.

According to the law of conservation of mass, what would be the number of H2 molecule in N2+H2→NH3 ?

Question 50 (a) An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound ammonia which has a characteristic pungent smell. Identify the element X. How many valence electrons does it have?

Soil is formed by water. Do you agree with the statement? Justify giving reasons.

Question 58 A solution of CuSO4 was kept in an iron pot. After a few days, the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.

The boiling point of a liquid _______ by the addition of impurities to it.

Cl2 + 2NaOH → NaCl + A–– + H2O to form. A is (Cold &amp; dilute)

Can water boil at -10 degree celcius or -20 degree celcius.Explain how and why?

In the reaction 2Ag + 2H2SO4→Ag2SO4 + 2H2O + SO2 sulphuric acid acts as

Which of the following is the structure of C6H12?

State whether the following statement is true or false : Solid carbon dioxide is stored under low pressure.

Do atoms have independent existence as like molecules?

Fe +S =Fes. Calculate the mass in g of iron sulphide formed when 28g of iron combines with 16g of sulphur.

Calculate the % composition of each element present in monosodium phosphate. Na = , H = , P = and O = .

Which of the following statements are correct I. Both LiCl and MgCl2 are soluble in ethanol II. Both LiCl and MgCl2 are deliquescent III. LiCl and MgCl2 form hydrates like LiCl.8H2O and MgCl2.2H2O IV. NaHCO3 used as fire extinguisher

When dissolved in water, Arrhenius base is a compound that:

What is the major difference between a solution and an ordinary mixture?

The catalyst used to reduce the decomposition of hydrogen peroxide is

Name A, B, C, D, E and F in the following diagram showing changes in its state

An element has two isotopes with atomic masses 17 and 18, occurring in the nature in ratio 1:1. What is the atomic weight of the element?

What is cation? [1 MARK]

A popular metal X reacts with oxygen gas to give an amphoteric oxide. Identify the metal X. Recall that amphoteric oxide show both acidic and basic behaviour. X+O2→Amphoteric Oxide

Why does our hand feel cold when we pour some spirit on it?

Atoms of _ elements that have 1, 2 or 3 valence elelctrons can lose electrons to atoms of _ elements which have 5, 6 or 7 electrons, thereby forming an electrovalent compound.

Cl2 + 2NaOH → NaCl + A–– + H2O to form. A is (Cold & dilute)