10223 + Interview Questions in Chemistry Page 64 InterviewSolution

3151.	In ground state an element has 13 electrons in its M shell the element is ?
Answer» In ground state an element has 13 electrons in its M shell the element is ?

Discussion

3152.	Arrange the following substances in increasing order of forces of attraction between the particles and explain. Water, Sugar, Oxygen. [ 3 MARKS ]
Answer» Arrange the following substances in increasing order of forces of attraction between the particles and explain. Water, Sugar, Oxygen. [ 3 MARKS ]

Discussion

3153.	Question 2 Name the technique to separate (a) butter from curd, (b) salt from sea-water, (c) camphor from salt
Answer» Question 2 Name the technique to separate (a) butter from curd, (b) salt from sea-water, (c) camphor from salt

Discussion

3154.	Which of the following is correct trend for electron affinity in halogens?
Answer» Which of the following is correct trend for electron affinity in halogens?

Discussion

3155.	The coordination number of Th in K4[Th(C2O4)4(OH2)2] is:C2O2−4=oxalato
Answer» The coordination number of $T h$ in $K_{4} [T h (C_{2} O_{4})_{4} (O H_{2})_{2}]$ is: $C_{2} O_{4}^{2 -} = oxalato$

Discussion

3156.	Floral symbol for perigynous
Answer» Floral symbol for perigynous

Discussion

3157.	The general formula for alkynes is:
Answer» The general formula for alkynes is:

Discussion

3158.	Which of the following elements does not exhibit electrovalency? (a) calcium (b) chromium (c) carbon (d) cadmium
Answer» Which of the following elements does not exhibit electrovalency? (a) calcium (b) chromium (c) carbon (d) cadmium

3158.

Which of the following elements does not exhibit electrovalency? (a) calcium (b) chromium (c) carbon (d) cadmium

Answer»

Which of the following elements does not exhibit electrovalency?

(a) calcium

(b) chromium

(c) carbon

(d) cadmium

Discussion

3159.	Why evaporation is a bulk phenomenon?
Answer» Why evaporation is a bulk phenomenon?

Discussion

3160.	The figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission (example - line number 5 arises from the transition level B to A). Which of the following spectral lines will also occur in the absorption spectrum?
Answer» The figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission $($ example - line number $5$ arises from the transition level $B$ to $A$ $)$ . Which of the following spectral lines will also occur in the absorption spectrum?

Discussion

3161.	Hydrolysis of P4O10 gives:
Answer» Hydrolysis of $P_{4} O_{10}$ gives:

Discussion

3162.	44 A solution of cu(II) sulphate is reacted with kCl and kl .In which case will the cu2+ be reduced to cu+?
Answer» 44 A solution of cu(II) sulphate is reacted with kCl and kl .In which case will the cu2+ be reduced to cu+?

Discussion

3163.	Q8)Complete the series: ELFA, GLHA, ILJA, _____, MLNA
Answer» Q8)Complete the series: ELFA, GLHA, ILJA, _____, MLNA

3163.

Q8)Complete the series: ELFA, GLHA, ILJA, _____, MLNA

Answer»

Q8)Complete the series:

ELFA, GLHA, ILJA, _____, MLNA

Discussion

3164.	Which of the compound has 3^° carbon atom?
Answer» Which of the compound has 3^° carbon atom?

Discussion

3165.	Question 1 (ii)Write down the formulae of:(ii) Aluminium chloride
Answer» Question 1 (ii) Write down the formulae of: (ii) Aluminium chloride

Discussion

3166.	What will be the ratio of the mass of carbon to the mass of oxygen in the CO2 molecules?
Answer» What will be the ratio of the mass of carbon to the mass of oxygen in the CO2 molecules?

Discussion

3167.	Isotopes differ in
Answer» Isotopes differ in

Discussion

3168.	What would happen if you cool a saturated copper sulphate solution very slowly?
Answer» What would happen if you cool a saturated copper sulphate solution very slowly?

Discussion

3169.	Question 48 (c) (a) Electropositive nature of the element(s) increases down the group and decreases across the period (b) Electronegativity of the element decreases down the group and increases across the period (c) Atomic size increases down the group and decreases across a period (left to right) (d) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the element with smallest atomic size.
Answer» Question 48 (c) (a) Electropositive nature of the element(s) increases down the group and decreases across the period (b) Electronegativity of the element decreases down the group and increases across the period (c) Atomic size increases down the group and decreases across a period (left to right) (d) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the element with smallest atomic size.

Discussion

3170.	How to do sublimation of ammonium chloride
Answer» How to do sublimation of ammonium chloride

Discussion

3171.	Question 4 (b) What property do all elements in the same column of the periodic table as fluorine have in common?
Answer» Question 4 (b) What property do all elements in the same column of the periodic table as fluorine have in common?

Discussion

3172.	6. Why in amines the quaternary salt structure does not show optical activity even though it has chiral nitrogen but tertiary amines shows optical avtivity?
Answer» 6. Why in amines the quaternary salt structure does not show optical activity even though it has chiral nitrogen but tertiary amines shows optical avtivity?

Discussion

3173.	Ammoniacal solution of MgSO4 in presence of NH4CI is heated with Na2HPO4 a white crystalline precipitate is formed of
Answer» Ammoniacal solution of $M g S O_{4}$ in presence of $N H_{4} C I$ is heated with $N a_{2} H P O_{4}$ a white crystalline precipitate is formed of

Discussion

3174.	3. What are different types of decomposition reaction
Answer» 3. What are different types of decomposition reaction

Discussion

3175.	_____ is the chemical formula of Glauber's salt.
Answer» _____ is the chemical formula of Glauber's salt.

Discussion

3176.	If a sample of water contains 68 ppm of Calcium Sulphate, what would be the hardness of the water?
Answer» If a sample of water contains 68 ppm of Calcium Sulphate, what would be the hardness of the water?

Discussion

3177.	Which of the following gas is formed when very dilute nitric acid reacts with magnesium at room temperature?
Answer» Which of the following gas is formed when very dilute nitric acid reacts with magnesium at room temperature?

Discussion

3178.	Potassium chromate is isomorphous to k2SO4. It has been found to have 26.78chromium. The atomic mass of chromium is (K=39.10)
Answer» Potassium chromate is isomorphous to k2SO4. It has been found to have 26.78chromium. The atomic mass of chromium is (K=39.10)

Discussion

3179.	What volume of 0.10 MH2SO4 must be added to 50 ml of a 0.10 M NaOH solution to make a solution in which the molarity of theH2SO4 is 0.050 M?
Answer» What volume of 0.10 M $H_{2} S O_{4}$ must be added to 50 ml of a 0.10 M NaOH solution to make a solution in which the molarity of the $H_{2} S O_{4}$ is 0.050 M?

Discussion

3180.	a first order reaction 75% completed in 50min.find the fraction of initial concentration of reactant dissociated in next 50min.
Answer» a first order reaction 75% completed in 50min.find the fraction of initial concentration of reactant dissociated in next 50min.

Discussion

3181.	The characteristic reaction of alkanes is
Answer» The characteristic reaction of alkanes is

Discussion

3182.	What is physical world?
Answer» What is physical world?

Discussion

3183.	a) ch3coo- b) ch3o- c) ho- d) c6h5nh- Arrange these in the order of nucleophilicity in polar protic solvent and explain it.
Answer» a) ch3coo- b) ch3o- c) ho- d) c6h5nh- Arrange these in the order of nucleophilicity in polar protic solvent and explain it.

Discussion

3184.	Which of the following has highest melting point in a. NaF b. MgF2 c. AlF3 d. SiF4
Answer» Which of the following has highest melting point in a. NaF b. MgF2 c. AlF3 d. SiF4

Discussion

3185.	What is the difference between physical and chemical classification of matter ?
Answer» What is the difference between physical and chemical classification of matter ?

Discussion

3186.	An organic compound A of molecular formula C2H6O is a constituent of wine and beer. This compound on heating with alkaline potassium permanganate forms another organic compound B which turns blue litmus to red. Identify the compounds A and B.
Answer» An organic compound A of molecular formula C₂H₆O is a constituent of wine and beer. This compound on heating with alkaline potassium permanganate forms another organic compound B which turns blue litmus to red. Identify the compounds A and B.

Discussion

3187.	State the difference between Atomic mass and molecular mass? Find the molecular mass of HNO3.
Answer» State the difference between Atomic mass and molecular mass? Find the molecular mass of HNO3.

3187.

State the difference between Atomic mass and molecular mass? Find the molecular mass of HNO3.

Answer»

State the difference between Atomic mass and molecular mass?

Find the molecular mass of HNO3.

Discussion

3188.	If a be the rdius of first bohr orbit of H- atom the de broglie wavelength of an electron revolving in the second Bohr's orbit will be ?
Answer» If a be the rdius of first bohr orbit of H- atom the de broglie wavelength of an electron revolving in the second Bohr's orbit will be ?

Discussion

3189.	What is n-factor as mentioned in lecture 1.4 of chemistry?
Answer» What is n-factor as mentioned in lecture 1.4 of chemistry?

Discussion

3190.	Two vessels A and B contain n1 moles of monoatomic gas at temperature T1 and n2 moles of diatomic gas at temperature T2 respectively. Now the two gases are mixed without loss of energy. The temperature of the mixture is
Answer» Two vessels A and B contain n1 moles of monoatomic gas at temperature T1 and n2 moles of diatomic gas at temperature T2 respectively. Now the two gases are mixed without loss of energy. The temperature of the mixture is

Discussion

3191.	Explain why plastic containers are favoured for storing food.
Answer» Explain why plastic containers are favoured for storing food.

Discussion

3192.	53 The value of 1st Ionisation energy for He is 2372Kj/mol, the value of 2nd Ionisation energy should be 1) 5248Kj/mol 2) 4852Kj/mol 3) 5648Kj/mol 4) none of these
Answer» 53 The value of 1st Ionisation energy for He is 2372Kj/mol, the value of 2nd Ionisation energy should be 1) 5248Kj/mol 2) 4852Kj/mol 3) 5648Kj/mol 4) none of these

Discussion

3193.	1 mole of NaCl is doped with 1÷100000 mole of SrCl2. The number of cationic vacancies in the crystal lattice will be.
Answer» 1 mole of NaCl is doped with 1÷100000 mole of SrCl2. The number of cationic vacancies in the crystal lattice will be.

Discussion

3194.	if 0.2 moles nacl is added in 2 mol water the vapourpressure of solution is? (vapour pressure of pure water is 760 torr
Answer» if 0.2 moles nacl is added in 2 mol water the vapourpressure of solution is? (vapour pressure of pure water is 760 torr

Discussion

3195.	Sir Is sea water in a place where there is no humans a homogenous mixture? Or If its homogeneous if I put additional salt what will it happen?
Answer» Sir Is sea water in a place where there is no humans a homogenous mixture? Or If its homogeneous if I put additional salt what will it happen?

3195.

Sir Is sea water in a place where there is no humans a homogenous mixture? Or If its homogeneous if I put additional salt what will it happen?

Answer»

Sir

Is sea water in a place where there is no humans a homogenous mixture?

Or

If its homogeneous if I put additional salt what will it happen?

Discussion

3196.	In Dobereiner's triads, when three elements in a triad are written in the increasing order of atomic masses; the atomic mass of the middle element is roughly the average of the atomic masses of the other two elements. Identify ‘X’ from the given triad. Li (6.9), Na (X), K (39.0)
Answer» In Dobereiner's triads, when three elements in a triad are written in the increasing order of atomic masses; the atomic mass of the middle element is roughly the average of the atomic masses of the other two elements. Identify ‘X’ from the given triad. Li (6.9), Na (X), K (39.0)

Discussion

3197.	WHAT ARE THE STATES OF MATTER?
Answer» WHAT ARE THE STATES OF MATTER?

Discussion

3198.	Derivative of a function is unique, but integration is not unique
Answer» Derivative of a function is unique, but integration is not unique

Discussion

3199.	In an attempt to demonstrate electrical conduction through an electrolyte, the following apparatus ( see the figure ) was set up.Which among the following statement(s) is/ are correct?(i) Bulb will not glow because electrolyte is not acidic.(ii) Bulb will glow because NaOH is a strong base and furnishes ions for conduction.(iii) Bulb will not glow because circuit is incomplete.(iv) Bulb will not glow because it depends upon the type of electrolytic solution.(a) (i) and (iii)(b) (ii) and (iv)(c) (ii) only(d) (iv) only
Answer» In an attempt to demonstrate electrical conduction through an electrolyte, the following apparatus ( see the figure ) was set up. Which among the following statement(s) is/ are correct? (i) Bulb will not glow because electrolyte is not acidic. (ii) Bulb will glow because NaOH is a strong base and furnishes ions for conduction. (iii) Bulb will not glow because circuit is incomplete. (iv) Bulb will not glow because it depends upon the type of electrolytic solution. (a) (i) and (iii) (b) (ii) and (iv) (c) (ii) only (d) (iv) only

Discussion

3200.	Name the oxide of sulphur which reacts with water to give sulphuric acid.
Answer» Name the oxide of sulphur which reacts with water to give sulphuric acid.

Discussion

Explore topic-wise InterviewSolutions in .

In ground state an element has 13 electrons in its M shell the element is ?

Arrange the following substances in increasing order of forces of attraction between the particles and explain. Water, Sugar, Oxygen. [ 3 MARKS ]

Question 2 Name the technique to separate (a) butter from curd, (b) salt from sea-water, (c) camphor from salt

Which of the following is correct trend for electron affinity in halogens?

The coordination number of Th in K4[Th(C2O4)4(OH2)2] is:C2O2−4=oxalato

Floral symbol for perigynous

The general formula for alkynes is:

Which of the following elements does not exhibit electrovalency? (a) calcium (b) chromium (c) carbon (d) cadmium

Why evaporation is a bulk phenomenon?

The figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission (example - line number 5 arises from the transition level B to A). Which of the following spectral lines will also occur in the absorption spectrum?

Hydrolysis of P4O10 gives:

44 A solution of cu(II) sulphate is reacted with kCl and kl .In which case will the cu2+ be reduced to cu+?

Q8)Complete the series: ELFA, GLHA, ILJA, _____, MLNA

Which of the compound has 3^° carbon atom?

Question 1 (ii)Write down the formulae of:(ii) Aluminium chloride

What will be the ratio of the mass of carbon to the mass of oxygen in the CO2 molecules?

Isotopes differ in

What would happen if you cool a saturated copper sulphate solution very slowly?

How to do sublimation of ammonium chloride

Question 4 (b) What property do all elements in the same column of the periodic table as fluorine have in common?

6. Why in amines the quaternary salt structure does not show optical activity even though it has chiral nitrogen but tertiary amines shows optical avtivity?

Ammoniacal solution of MgSO4 in presence of NH4CI is heated with Na2HPO4 a white crystalline precipitate is formed of

3. What are different types of decomposition reaction

_____ is the chemical formula of Glauber's salt.

If a sample of water contains 68 ppm of Calcium Sulphate, what would be the hardness of the water?

Which of the following gas is formed when very dilute nitric acid reacts with magnesium at room temperature?

Potassium chromate is isomorphous to k2SO4. It has been found to have 26.78chromium. The atomic mass of chromium is (K=39.10)

What volume of 0.10 MH2SO4 must be added to 50 ml of a 0.10 M NaOH solution to make a solution in which the molarity of theH2SO4 is 0.050 M?

a first order reaction 75% completed in 50min.find the fraction of initial concentration of reactant dissociated in next 50min.

The characteristic reaction of alkanes is

What is physical world?

a) ch3coo- b) ch3o- c) ho- d) c6h5nh- Arrange these in the order of nucleophilicity in polar protic solvent and explain it.

Which of the following has highest melting point in a. NaF b. MgF2 c. AlF3 d. SiF4

What is the difference between physical and chemical classification of matter ?

An organic compound A of molecular formula C2H6O is a constituent of wine and beer. This compound on heating with alkaline potassium permanganate forms another organic compound B which turns blue litmus to red. Identify the compounds A and B.

State the difference between Atomic mass and molecular mass? Find the molecular mass of HNO3.

If a be the rdius of first bohr orbit of H- atom the de broglie wavelength of an electron revolving in the second Bohr's orbit will be ?

What is n-factor as mentioned in lecture 1.4 of chemistry?

Two vessels A and B contain n1 moles of monoatomic gas at temperature T1 and n2 moles of diatomic gas at temperature T2 respectively. Now the two gases are mixed without loss of energy. The temperature of the mixture is

Explain why plastic containers are favoured for storing food.

53 The value of 1st Ionisation energy for He is 2372Kj/mol, the value of 2nd Ionisation energy should be 1) 5248Kj/mol 2) 4852Kj/mol 3) 5648Kj/mol 4) none of these

1 mole of NaCl is doped with 1÷100000 mole of SrCl2. The number of cationic vacancies in the crystal lattice will be.

if 0.2 moles nacl is added in 2 mol water the vapourpressure of solution is? (vapour pressure of pure water is 760 torr

Sir Is sea water in a place where there is no humans a homogenous mixture? Or If its homogeneous if I put additional salt what will it happen?

In Dobereiner's triads, when three elements in a triad are written in the increasing order of atomic masses; the atomic mass of the middle element is roughly the average of the atomic masses of the other two elements. Identify ‘X’ from the given triad. Li (6.9), Na (X), K (39.0)

WHAT ARE THE STATES OF MATTER?

Derivative of a function is unique, but integration is not unique

Name the oxide of sulphur which reacts with water to give sulphuric acid.