10223 + Interview Questions in Chemistry Page 76 InterviewSolution

3751.	Define the term 'mole'?
Answer» Define the term 'mole'?

Discussion

3752.	Give secientific reasons.A. All the mass of an atom is concenrated in the nucleus.B. Atom is electrically neutral.C. Atomic mass number is a whole number.D. Atoms are stable though negatively charged electron are revolving within it.
Answer» Give secientific reasons. A. All the mass of an atom is concenrated in the nucleus. B. Atom is electrically neutral. C. Atomic mass number is a whole number. D. Atoms are stable though negatively charged electron are revolving within it.

Discussion

3753.	37.Arrange para nitrobenzoic acid(1), para chlorobenzoic acid (2),benzoic acid (3),para toluic acid (4),para hydroxybenzoic acid (5) in order of decreasing acidity
Answer» 37.Arrange para nitrobenzoic acid(1), para chlorobenzoic acid (2),benzoic acid (3),para toluic acid (4),para hydroxybenzoic acid (5) in order of decreasing acidity

Discussion

3754.	In Calcium Nitrate, what is the ionic charge on Nitrate ion?
Answer» In Calcium Nitrate, what is the ionic charge on Nitrate ion?

Discussion

3755.	Atoms of Argon and Calcium are ideal examples of ______________
Answer» Atoms of Argon and Calcium are ideal examples of ______________

Discussion

3756.	State the number of atoms of each element present in: C6H12O6 H2SO4 HNO3 CaCO3
Answer» State the number of atoms of each element present in: C6H12O6 H2SO4 HNO3 CaCO3

Discussion

3757.	the equivalent conduc†an ce of M/32 sol of a weak monobasic acid is 8mho cm and at infinite dilution is 400mho cm the dissoiation cons†an t of this acid is
Answer» the equivalent conduc†an ce of M/32 sol of a weak monobasic acid is 8mho cm and at infinite dilution is 400mho cm the dissoiation cons†an t of this acid is

Discussion

3758.	Which of the following is a green house gas?
Answer» Which of the following is a green house gas?

Discussion

3759.	What is the difference between the molecular mass and empirical mass of ethane?
Answer» What is the difference between the molecular mass and empirical mass of ethane?

Discussion

3760.	for any substance why dose the temperature remain constant during a the change of state?
Answer» for any substance why dose the temperature remain constant during a the change of state?

Discussion

3761.	Which of the following are compounds ? (i) CO (ii) No (iii) NO (iv) Co (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)
Answer» Which of the following are compounds ? (i) CO (ii) No (iii) NO (iv) Co (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)

3761.

Which of the following are compounds ? (i) CO (ii) No (iii) NO (iv) Co (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)

Answer»

Which of the following are compounds ?

(i) CO (ii) No (iii) NO (iv) Co

(a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)

Discussion

3762.	Which theory has provided an explanation for the law of conservation of mass and the law of definite proportions?
Answer» Which theory has provided an explanation for the law of conservation of mass and the law of definite proportions?

Discussion

3763.	Explain why, hydrogen and oxygen are considered elements whereas water is not considered an element.
Answer» Explain why, hydrogen and oxygen are considered elements whereas water is not considered an element.

Discussion

3764.	In formal charge How to find number of shared paired electron
Answer» In formal charge How to find number of shared paired electron

Discussion

3765.	Why is it logical to end a period in the modern periodic table?
Answer» Why is it logical to end a period in the modern periodic table?

Discussion

3766.	The volume of oxygen liberated from 0.88 g of H,O is (1) 112 m (3) 56 ml (2) 224 m (4) 336 ml
Answer» The volume of oxygen liberated from 0.88 g of H,O is (1) 112 m (3) 56 ml (2) 224 m (4) 336 ml

Discussion

3767.	17. When CH2=CH-o-CH2-CH3 react with one mole of HI, One of the products formed is. 1.ethane 2.ethanol 3.idoethane 4.ethanal
Answer» 17. When CH2=CH-o-CH2-CH3 react with one mole of HI, One of the products formed is. 1.ethane 2.ethanol 3.idoethane 4.ethanal

Discussion

3768.	What do you understand by rancidity? How can we reduce the problem of rancidity?
Answer» What do you understand by rancidity? How can we reduce the problem of rancidity?

Discussion

3769.	Yhe order of magnitude of the velocity of light in cgs units is
Answer» Yhe order of magnitude of the velocity of light in cgs units is

Discussion

3770.	Write the valency of the following elements: (i) Ca (ii) C (iii) O [3 MARKS]
Answer» Write the valency of the following elements: (i) Ca (ii) C (iii) O [3 MARKS]

Discussion

3771.	A: Enthalpy of neutralisation of 1 equivalent each of HCl and H_2SO_4 with NaOH is same. R: Enthalpy of neutralisation is always the heat evolved when 1 mole acid is neutralised by a base.
Answer» A: Enthalpy of neutralisation of 1 equivalent each of HCl and H_2SO_4 with NaOH is same. R: Enthalpy of neutralisation is always the heat evolved when 1 mole acid is neutralised by a base.

Discussion

3772.	The soil pH of cropland is 5. What kind of fertilizers should be used on that land?
Answer» The soil pH of cropland is 5. What kind of fertilizers should be used on that land?

Discussion

3773.	X and Y are the two extreme elements of the series which obey Newland's law of octaves. How many elements are there in between X and Y?
Answer» X and Y are the two extreme elements of the series which obey Newland's law of octaves. How many elements are there in between X and Y?

Discussion

3774.	The difference in the oxidation numbers of the two types of sulphur atoms in Na2S4O6 is
Answer» The difference in the oxidation numbers of the two types of sulphur atoms in $N a_{2} S_{4} O_{6}$ is

Discussion

3775.	A carbon compound containing only carbon and oxygen has an approximate molecular mass of 290. On analysis, it is found to contain 50% by mass of each element. what is the molecular formula of the compound?
Answer» A carbon compound containing only carbon and oxygen has an approximate molecular mass of 290. On analysis, it is found to contain 50% by mass of each element. what is the molecular formula of the compound?

Discussion

3776.	Which of the following option(s) is/are correct regarding physical and chemical changes?
Answer» Which of the following option(s) is/are correct regarding physical and chemical changes?

Discussion

3777.	if A={1,3}, B={2,3}, C={3,5} then n{(AB)union(BC)}
Answer» if A={1,3}, B={2,3}, C={3,5} then n{(AB)union(BC)}

Discussion

3778.	Which of the following is disproportionation reaction?
Answer» Which of the following is disproportionation reaction?

Discussion

3779.	39 Why doesn't the p-block elements have +2 oxidation state
Answer» 39 Why doesn't the p-block elements have +2 oxidation state

Discussion

3780.	Write a program to read elements of a list.a) The program should ask for the position of the element to be deleted from the list. Write a function to delete the element at the desired position in the list.b) The program should ask for the value of the element to be deleted from the list. Write a function to delete the element of this value from the list.
Answer» Write a program to read elements of a list. a) The program should ask for the position of the element to be deleted from the list. Write a function to delete the element at the desired position in the list. b) The program should ask for the value of the element to be deleted from the list. Write a function to delete the element of this value from the list.

Discussion

3781.	निम्नलिखितप्रश्न का उत्तरदीजिए −अंतमें कवि क्याअनुनय करता है?
Answer» निम्नलिखित प्रश्न का उत्तर दीजिए − अंत में कवि क्या अनुनय करता है?

3781.

निम्नलिखितप्रश्न का उत्तरदीजिए −अंतमें कवि क्याअनुनय करता है?

Answer»

निम्नलिखित
प्रश्न का उत्तर
दीजिए −

अंत
में कवि क्या
अनुनय करता है?

Discussion

3782.	The number of protons in the nucleus of an atom is called it's.............
Answer» The number of protons in the nucleus of an atom is called it's.............

Discussion

3783.	How many grams of MnO2 are needed to get 36.2g of MnCl2 from the equation given below?MnO2 (s)+ 4HCl(aq) →MnCl2 (aq)+2H2O (l)+Cl2(g)87 g 36.5 g 126 g 18 g 71 g 25
Answer» How many grams of ${MnO}_{2}$ are needed to get 36.2g of ${MnCl}_{2}$ from the equation given below? ${MnO}_{2} (s) + 4 HCl (aq) \to {MnCl}_{2} (aq) + 2 H_{2} O (l) + {Cl}_{2} (g) 87 g 36.5 g 126 g 18 g 71 g$ 25

Discussion

3784.	The compound having molecular mass 63 u is[At. mass of Na=23 u][At. mass of Cl=35.5 u][At. mass of O=16 u][At. mass of H=1 u][At. mass of N=14 u]
Answer» The compound having molecular mass 63 u is $[A t . m a s s o f N a = 23 u] [A t . m a s s o f C l = 35.5 u] [A t . m a s s o f O = 16 u] [A t . m a s s o f H = 1 u] [A t . m a s s o f N = 14 u]$

Discussion

3785.	What happens to the melting point of ice when pressure is increased?
Answer» What happens to the melting point of ice when pressure is increased?

Discussion

3786.	The surface enErgy of a liquid drop is U it is sprayed into 1331 identical droplets Surface enrgy of a small drop will beUU/1331121UU/121
Answer» The surface enErgy of a liquid drop is U it is sprayed into 1331 identical droplets Surface enrgy of a small drop will be U U/1331 121U U/121

Discussion

3787.	what is law of photochemical equivalence?
Answer» what is law of photochemical equivalence?

Discussion

3788.	5.why water is a compound not a mixture .
Answer» 5.why water is a compound not a mixture .

Discussion

3789.	Explain colloid with examples?
Answer» Explain colloid with examples?

Discussion

3790.	Correct the following statements : (a) Hydrogen is used as a fuel for rocket propulsion. (b) All metals react with acids to give hydrogen. (c) Metals adsorb hydrogen. (d) Very dilute nitric acid reacts with zinc to produce hydrogen. (e) Conc.H2SO4 reacts with zinc to liberate hydrogen.
Answer» Correct the following statements : (a) Hydrogen is used as a fuel for rocket propulsion. (b) All metals react with acids to give hydrogen. (c) Metals adsorb hydrogen. (d) Very dilute nitric acid reacts with zinc to produce hydrogen. (e) $C o n c . H_{2} S O_{4}$ reacts with zinc to liberate hydrogen.

3790.

Correct the following statements : (a) Hydrogen is used as a fuel for rocket propulsion. (b) All metals react with acids to give hydrogen. (c) Metals adsorb hydrogen. (d) Very dilute nitric acid reacts with zinc to produce hydrogen. (e) Conc.H2SO4 reacts with zinc to liberate hydrogen.

Answer»

Correct the following statements :

(a) Hydrogen is used as a fuel for rocket propulsion.

(b) All metals react with acids to give hydrogen.

(c) Metals adsorb hydrogen.

(d) Very dilute nitric acid reacts with zinc to produce hydrogen.

(e) $C o n c . H_{2} S O_{4}$ reacts with zinc to liberate hydrogen.

Discussion

3791.	The decomposition of(PH3) on( W) at low pressure is a first order reaction it is because 1. Rate is independent of the surface coverage 2. Rate is proportional to the surface coverage Above which option is correct & Why??
Answer» The decomposition of(PH3) on( W) at low pressure is a first order reaction it is because 1. Rate is independent of the surface coverage 2. Rate is proportional to the surface coverage Above which option is correct & Why??

Discussion

3792.	Differentiate between evaporation and vaporization?
Answer» Differentiate between evaporation and vaporization?

Discussion

3793.	If solubility of any gas in the liquid at 1 bar pressure is 0.05 mol/L. What will be its solubility at 3 atm pressure keeping the temperature constant?
Answer» If solubility of any gas in the liquid at 1 bar pressure is 0.05 mol/L. What will be its solubility at 3 atm pressure keeping the temperature constant?

Discussion

3794.	A student took four test-tubes containing solutions of different colours marked I, II, III and IV as shown here. The test-tubes containing copper sulphate solution and ferrous sulphate solution could be the tubes :(1) I and III(2) II and III(3) III and IV(4) II and IV
Answer» A student took four test-tubes containing solutions of different colours marked I, II, III and IV as shown here. The test-tubes containing copper sulphate solution and ferrous sulphate solution could be the tubes : (1) I and III (2) II and III (3) III and IV (4) II and IV

Discussion

3795.	Fill in the blanks:(a) Matter is neither …………….. nor ……………... in a chemical reaction.(b) In a compound, the constitute elements are always present in a definite proportion by ……………. .(c) Two or more elements combine to form ………………… .(d) The combining capacity of an element is known as its ………………. .
Answer» Fill in the blanks: (a) Matter is neither …………….. nor ……………... in a chemical reaction. (b) In a compound, the constitute elements are always present in a definite proportion by ……………. . (c) Two or more elements combine to form ………………… . (d) The combining capacity of an element is known as its ………………. .

3795.

Fill in the blanks:(a) Matter is neither …………….. nor ……………... in a chemical reaction.(b) In a compound, the constitute elements are always present in a definite proportion by ……………. .(c) Two or more elements combine to form ………………… .(d) The combining capacity of an element is known as its ………………. .

Answer»

Fill in the blanks:

(a) Matter is neither …………….. nor ……………... in a chemical reaction.

(b) In a compound, the constitute elements are always present in a definite proportion by ……………. .

(c) Two or more elements combine to form ………………… .

(d) The combining capacity of an element is known as its ………………. .

Discussion

3796.	What are Quantum Numbers ?
Answer» What are Quantum Numbers ?

Discussion

3797.	A drop of ink spreads evenly throughout the water. Why?
Answer» A drop of ink spreads evenly throughout the water. Why?

Discussion

3798.	Calculate the percentage of nitrogen in Urea.
Answer» Calculate the percentage of nitrogen in Urea.

Discussion

3799.	49.the distance b/w hydrogen atom and the flourine atom in a hydrogen flouride molecule is 0.92 angstrom .the mass of hydrogen atom is 1amu and flourine atom is 19 amu .the position of the centre of mass of the hydrogen flouride molecule is
Answer» 49.the distance b/w hydrogen atom and the flourine atom in a hydrogen flouride molecule is 0.92 angstrom .the mass of hydrogen atom is 1amu and flourine atom is 19 amu .the position of the centre of mass of the hydrogen flouride molecule is

Discussion

3800.	22 The mole fraction of the solute in one molal aqueous solution is 1)0.027 2)0.036 3)0.018 4)0.009
Answer» 22 The mole fraction of the solute in one molal aqueous solution is 1)0.027 2)0.036 3)0.018 4)0.009

Discussion

Explore topic-wise InterviewSolutions in .

Define the term 'mole'?

Give secientific reasons.A. All the mass of an atom is concenrated in the nucleus.B. Atom is electrically neutral.C. Atomic mass number is a whole number.D. Atoms are stable though negatively charged electron are revolving within it.

37.Arrange para nitrobenzoic acid(1), para chlorobenzoic acid (2),benzoic acid (3),para toluic acid (4),para hydroxybenzoic acid (5) in order of decreasing acidity

In Calcium Nitrate, what is the ionic charge on Nitrate ion?

Atoms of Argon and Calcium are ideal examples of ______________

State the number of atoms of each element present in: C6H12O6 H2SO4 HNO3 CaCO3

the equivalent conduc†an ce of M/32 sol of a weak monobasic acid is 8mho cm and at infinite dilution is 400mho cm the dissoiation cons†an t of this acid is

Which of the following is a green house gas?

What is the difference between the molecular mass and empirical mass of ethane?

for any substance why dose the temperature remain constant during a the change of state?

Which of the following are compounds ? (i) CO (ii) No (iii) NO (iv) Co (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)

Which theory has provided an explanation for the law of conservation of mass and the law of definite proportions?

Explain why, hydrogen and oxygen are considered elements whereas water is not considered an element.

In formal charge How to find number of shared paired electron

Why is it logical to end a period in the modern periodic table?

The volume of oxygen liberated from 0.88 g of H,O is (1) 112 m (3) 56 ml (2) 224 m (4) 336 ml

17. When CH2=CH-o-CH2-CH3 react with one mole of HI, One of the products formed is. 1.ethane 2.ethanol 3.idoethane 4.ethanal

What do you understand by rancidity? How can we reduce the problem of rancidity?

Yhe order of magnitude of the velocity of light in cgs units is

Write the valency of the following elements: (i) Ca (ii) C (iii) O [3 MARKS]​

A: Enthalpy of neutralisation of 1 equivalent each of HCl and H_2SO_4 with NaOH is same. R: Enthalpy of neutralisation is always the heat evolved when 1 mole acid is neutralised by a base.

The soil pH of cropland is 5. What kind of fertilizers should be used on that land?

X and Y are the two extreme elements of the series which obey Newland's law of octaves. How many elements are there in between X and Y?

The difference in the oxidation numbers of the two types of sulphur atoms in Na2S4O6 is

A carbon compound containing only carbon and oxygen has an approximate molecular mass of 290. On analysis, it is found to contain 50% by mass of each element. what is the molecular formula of the compound?

Which of the following option(s) is/are correct regarding physical and chemical changes?

if A={1,3}, B={2,3}, C={3,5} then n{(A*B)union(B*C)}

Which of the following is disproportionation reaction?

39 Why doesn't the p-block elements have +2 oxidation state

निम्नलिखितप्रश्न का उत्तरदीजिए −अंतमें कवि क्याअनुनय करता है?

The number of protons in the nucleus of an atom is called it's.............

How many grams of MnO2 are needed to get 36.2g of MnCl2 from the equation given below?MnO2 (s)+ 4HCl(aq) →MnCl2 (aq)+2H2O (l)+Cl2(g)87 g 36.5 g 126 g 18 g 71 g 25

The compound having molecular mass 63 u is[At. mass of Na=23 u][At. mass of Cl=35.5 u][At. mass of O=16 u][At. mass of H=1 u][At. mass of N=14 u]

What happens to the melting point of ice when pressure is increased?

The surface enErgy of a liquid drop is U it is sprayed into 1331 identical droplets Surface enrgy of a small drop will beUU/1331121UU/121

what is law of photochemical equivalence?

5.why water is a compound not a mixture .

Explain colloid with examples?

Correct the following statements : (a) Hydrogen is used as a fuel for rocket propulsion. (b) All metals react with acids to give hydrogen. (c) Metals adsorb hydrogen. (d) Very dilute nitric acid reacts with zinc to produce hydrogen. (e) Conc.H2SO4 reacts with zinc to liberate hydrogen.

The decomposition of(PH3) on( W) at low pressure is a first order reaction it is because 1. Rate is independent of the surface coverage 2. Rate is proportional to the surface coverage Above which option is correct & Why??

Differentiate between evaporation and vaporization?

If solubility of any gas in the liquid at 1 bar pressure is 0.05 mol/L. What will be its solubility at 3 atm pressure keeping the temperature constant?

A student took four test-tubes containing solutions of different colours marked I, II, III and IV as shown here. The test-tubes containing copper sulphate solution and ferrous sulphate solution could be the tubes :(1) I and III(2) II and III(3) III and IV(4) II and IV

What are Quantum Numbers ?

A drop of ink spreads evenly throughout the water. Why?

Calculate the percentage of nitrogen in Urea.

49.the distance b/w hydrogen atom and the flourine atom in a hydrogen flouride molecule is 0.92 angstrom .the mass of hydrogen atom is 1amu and flourine atom is 19 amu .the position of the centre of mass of the hydrogen flouride molecule is

22 The mole fraction of the solute in one molal aqueous solution is 1)0.027 2)0.036 3)0.018 4)0.009

Write the valency of the following elements: (i) Ca (ii) C (iii) O [3 MARKS]

if A={1,3}, B={2,3}, C={3,5} then n{(AB)union(BC)}