10223 + Interview Questions in Chemistry Page 17 InterviewSolution

801.	Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached. 1P1, 0n1, −1e0
Answer» Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached. $_{1} P^{1},_{0} n^{1},_{- 1} e^{0}$

801.

Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached. 1P1, 0n1, −1e0

Answer»

Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached.

$_{1} P^{1},_{0} n^{1},_{- 1} e^{0}$

Discussion

802.	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

803.	An element E forms an oxide EO².write the valency of E and chemical formula of its chloride.
Answer» An element E forms an oxide EO².write the valency of E and chemical formula of its chloride.

Discussion

804.	How many molecules there in O2 ?
Answer» How many molecules there in $O_{2}$ ?

Discussion

805.	State two characteristics of matter demonstrated by :Brownian motion.
Answer» State two characteristics of matter demonstrated by : Brownian motion.

Discussion

806.	Are the compounds that show John teller distortion more stable than those which do not show John teller distortion?
Answer» Are the compounds that show John teller distortion more stable than those which do not show John teller distortion?

Discussion

807.	What is full form of CFC?
Answer» What is full form of CFC?

Discussion

808.	How to calculate the n factor of the following reactionCaOCl2 + H2O +2KI = Ca(OH)2 + I2 +2 KCl
Answer» How to calculate the n factor of the following reaction CaOCl2 + H2O +2KI = Ca(OH)2 + I2 +2 KCl

Discussion

809.	Fill in the following blanks in respect of an atom of an element : Number of protonsNumber of neutronsMass numberAtomic numberNumber of electronsValency1112−−−−−−−−
Answer» Fill in the following blanks in respect of an atom of an element : $\begin{matrix} Number of protons & Number of neutrons & Mass number & Atomic number & Number of electrons & Valency 11 & 12 & - - & - - & - - & - - \end{matrix}$

809.

Fill in the following blanks in respect of an atom of an element : Number of protonsNumber of neutronsMass numberAtomic numberNumber of electronsValency1112−−−−−−−−

Answer»

Fill in the following blanks in respect of an atom of an element :

$\begin{matrix} Number of protons & Number of neutrons & Mass number & Atomic number & Number of electrons & Valency 11 & 12 & - - & - - & - - & - - \end{matrix}$

Discussion

810.	Paheli bought a statue made of copper. To her surprise, it acquired a dull green coating after a couple of months. Explain the reason.
Answer» Paheli bought a statue made of copper. To her surprise, it acquired a dull green coating after a couple of months. Explain the reason.

Discussion

811.	Which of the following are 'pure substances' ? Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Answer» Which of the following are 'pure substances' ? Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air

811.

Which of the following are 'pure substances' ? Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air

Answer»

Which of the following are 'pure substances' ?

Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air

Discussion

812.	17. In a reaction, 2X gives Y , the concentation of X decreases from 0.50M to 0.38M in 10 min. What is the rate of reaction in M per second during this interval??
Answer» 17. In a reaction, 2X gives Y , the concentation of X decreases from 0.50M to 0.38M in 10 min. What is the rate of reaction in M per second during this interval??

Discussion

813.	Why don't electrons in shells radiate energy?
Answer» Why don't electrons in shells radiate energy?

Discussion

814.	Which amongst the following chemicals is used in preliminary tests for anions?
Answer» Which amongst the following chemicals is used in preliminary tests for anions?

Discussion

815.	What is the differences between Molar mass and Molecular mass? What is the formula for finding Molar mass and Molecular mass??
Answer» What is the differences between Molar mass and Molecular mass? What is the formula for finding Molar mass and Molecular mass??

Discussion

816.	11. The mass of CaCO3 produed when CO2 is bubbled through 500mL of 0.5 M Ca(OH)2 solution will be
Answer» 11. The mass of CaCO3 produed when CO2 is bubbled through 500mL of 0.5 M Ca(OH)2 solution will be

Discussion

817.	Which of the following statements are true about electronegativity in the periodic table?
Answer» Which of the following statements are true about electronegativity in the periodic table?

Discussion

818.	Why don’t stains erase when washed with water alone?
Answer» Why don’t stains erase when washed with water alone?

Discussion

819.	In Acidic medium moles of KMnO4 required to oxidise 1.5 moles of Cu2S will be :- 1 ) 1.2 mole 2) 1.6 mole 3) 2.1 mole 4) 2.4 mole
Answer» In Acidic medium moles of KMnO4 required to oxidise 1.5 moles of Cu2S will be :- 1 ) 1.2 mole 2) 1.6 mole 3) 2.1 mole 4) 2.4 mole

Discussion

820.	What is a mixture, and how is it different from a compound?
Answer» What is a mixture, and how is it different from a compound?

Discussion

821.	Complex in which central atom contain minimum electron in valence shell(1) [Co(CO)4]+(2) [Mn(CO)5]-(3) [V(CO)6](4) [Cr(CO)6]
Answer» Complex in which central atom contain minimum electron in valence shell (1) [Co(CO)4]+ (2) [Mn(CO)5]- (3) [V(CO)6] (4) [Cr(CO)6]

Discussion

822.	Compare the properties of electrons, protons and neutrons.
Answer» Compare the properties of electrons, protons and neutrons.

Discussion

823.	Question 1What do you mean by catenation?
Answer» Question 1 What do you mean by catenation?

823.

Question 1What do you mean by catenation?

Answer»

Question 1

What do you mean by catenation?

Discussion

824.	In the reaction 4A+2B+3C = A4 B2 C3 what will be the number of moles of product formed, starting from 1 mole of A , 0.6 mole of B and 0.72 mole of C?
Answer» In the reaction 4A+2B+3C = A₄B₂C₃what will be the number of moles of product formed, starting from 1 mole of A , 0.6 mole of B and 0.72 mole of C?

Discussion

825.	A mixture of CO and CO_2 is found to have density 1.5gm/L at 27^0C and 760 torr pressure. Then composition of mixture in percentage of CO and CO_2 respectively will be (1) 10.3,89.7 (2) 44.1,55.9 (3) 84,16 (4) 50,50
Answer» A mixture of CO and CO_2 is found to have density 1.5gm/L at 27^0C and 760 torr pressure. Then composition of mixture in percentage of CO and CO_2 respectively will be (1) 10.3,89.7 (2) 44.1,55.9 (3) 84,16 (4) 50,50

Discussion

826.	Amongacetic acid, phenol and n-hexanol, which of the compound(S) will react withNaHCO3 solution to give sodium salt and CO2?
Answer» Among acetic acid, phenol and n-hexanol, which of the compound(S) will react with NaHCO₃ solution to give sodium salt and CO₂?

Discussion

827.	When cinnabar is heated in air, the gas evolved is:
Answer» When cinnabar is heated in air, the gas evolved is:

Discussion

828.	An organic compound contains 75% carbon and 25% hydrogen. The empirical formula of the compound would be:
Answer» An organic compound contains $75 %$ carbon and $25 %$ hydrogen. The empirical formula of the compound would be:

Discussion

829.	25. Which of following is an oxidizing agent ? (a)Mn(CO)_5 (b)Fe(CO)_5 (c)Mn_2(CO)_{10} (d)Fe_2(CO)_9
Answer» 25. Which of following is an oxidizing agent ? (a)Mn(CO)_5 (b)Fe(CO)_5 (c)Mn_2(CO)_{10} (d)Fe_2(CO)_9

Discussion

830.	At room temperature the rms speed of the molecules of a certain diatomic gas is found to be 1920 m/s. The gas is
Answer» At room temperature the rms speed of the molecules of a certain diatomic gas is found to be 1920 m/s. The gas is

Discussion

831.	Find the number of oxygen atoms in 126 g of HNO3.
Answer» Find the number of oxygen atoms in 126 g of $H N O_{3}$ .

Discussion

832.	A source of monochromatic radiation of wavelength 400 nm provides 1000 J of energy in 10 seconds. When this radiation falls on the surface of sodium, x×1020 electrons are ejected per second. Assume that wavelength 400 nm is sufficient for ejection of electron from the surface of sodium metal. The value of x is . (Nearest integer)(h=6.626×10−34 Js)
Answer» A source of monochromatic radiation of wavelength 400 nm provides 1000 J of energy in 10 seconds. When this radiation falls on the surface of sodium, $x \times 10^{20}$ electrons are ejected per second. Assume that wavelength 400 nm is sufficient for ejection of electron from the surface of sodium metal. The value of x is . (Nearest integer) $(h = 6.626 \times 10^{- 34} J s)$

Discussion

833.	58.There is a line given that :- Besides dipole dipole interactions, polar molecules can also interact by London forces. Thus the total intermolecular force in polar molecules increases. But How? London forces are present in between the temporary dipoles .
Answer» 58.There is a line given that :- Besides dipole dipole interactions, polar molecules can also interact by London forces. Thus the total intermolecular force in polar molecules increases. But How? London forces are present in between the temporary dipoles .

Discussion

834.	(a) What is an Ion?(b) Differentiate between cations and anions?
Answer» (a) What is an Ion? (b) Differentiate between cations and anions?

Discussion

835.	60. 32g of sulphur react with 32g of oxygen even if more than 32g of sulphur are available.Which law of chemical combination does this illustrate?
Answer» 60. 32g of sulphur react with 32g of oxygen even if more than 32g of sulphur are available.Which law of chemical combination does this illustrate?

Discussion

836.	the molecular weight of an oxide of chlorine is 182g/mol.Determine the molecular formula of the compound.
Answer» the molecular weight of an oxide of chlorine is 182g/mol.Determine the molecular formula of the compound.

Discussion

837.	A satellite S is moving in an elliptical orbit around the earth.The mass of the satellite is very small as compared to the mass of the earth.Then(1) The acceleration of S is always directed towards the centre of the earth(2) The angular momentum of S about the centre of the earth changes in direction,but its magnitude remains constant(3) The total mechanical energy of S varies periodically with time(4) The linear momentum of S remains constant in magnitude
Answer» A satellite S is moving in an elliptical orbit around the earth.The mass of the satellite is very small as compared to the mass of the earth.Then (1) The acceleration of S is always directed towards the centre of the earth (2) The angular momentum of S about the centre of the earth changes in direction,but its magnitude remains constant (3) The total mechanical energy of S varies periodically with time (4) The linear momentum of S remains constant in magnitude

Discussion

838.	Question 21The volume of 50 g of a substance is 20 cm3. If the density of water is 1 g cm−3, will the substance float or sink?
Answer» Question 21 The volume of 50 g of a substance is $20 c m^{3}$ . If the density of water is $1 g c m^{- 3}$ , will the substance float or sink?

Discussion

839.	(i) State the various postulates of Dalton's atomic theory of matter.(ii) Which postulates of Dalton's atomic theory can explain the law of conservation of mass?(iii) Which postulate of Dalton's atomic theory can explain the law of constant proportions?
Answer» (i) State the various postulates of Dalton's atomic theory of matter. (ii) Which postulates of Dalton's atomic theory can explain the law of conservation of mass? (iii) Which postulate of Dalton's atomic theory can explain the law of constant proportions?

Discussion

840.	According to the octet rule an atom can have maximum ______ valence electron in its outermost shell. 8
Answer» According to the octet rule an atom can have maximum ______ valence electron in its outermost shell. 8

Discussion

841.	An atom has 2 electron in K shell ,8electron in L shell and 8 electron in M shell .The number f s electron present in the element is
Answer» An atom has 2 electron in K shell ,8electron in L shell and 8 electron in M shell .The number f s electron present in the element is

Discussion

842.	What is a boss Einstein condensate
Answer» What is a boss Einstein condensate

Discussion

843.	Glass wares are wrapped in straw during their transportation.give reason.
Answer» Glass wares are wrapped in straw during their transportation.give reason.

Discussion

844.	In an experiment, 100 ml of ozonised oxygen was reduced to 60 ml when treated with turpentine. What would be the increase in volume if the original sample was heated until no further change occured ?(All volumes were measured under identical conditions). ?
Answer» In an experiment, 100 ml of ozonised oxygen was reduced to 60 ml when treated with turpentine. What would be the increase in volume if the original sample was heated until no further change occured ?(All volumes were measured under identical conditions). ?

Discussion

845.	Two radioactive materials A and B have decay cons†an ts 4 Lambda and lambda respectively. If initially they have 2N and N nuclei respectively then the timebat which they have same numner of nuclei
Answer» Two radioactive materials A and B have decay cons†an ts 4 Lambda and lambda respectively. If initially they have 2N and N nuclei respectively then the timebat which they have same numner of nuclei

Discussion

846.	What is the Lewis dot structure of beryllium fluoride??
Answer» What is the Lewis dot structure of beryllium fluoride??

Discussion

847.	One of the following does not show Tyndall effect. This one is: (a) soap solution (b) ink (c) sugar solution (d) starch solution
Answer» One of the following does not show Tyndall effect. This one is: (a) soap solution (b) ink (c) sugar solution (d) starch solution

847.

One of the following does not show Tyndall effect. This one is: (a) soap solution (b) ink (c) sugar solution (d) starch solution

Answer»

One of the following does not show Tyndall effect. This one is:

(a) soap solution (b) ink (c) sugar solution (d) starch solution

Discussion

848.	What is least count when we are talking about accuracy and precision
Answer» What is least count when we are talking about accuracy and precision

Discussion

849.	Question 9:Define the following terms:(i) Non-Periodic change (ii) Man-made change(iii) Desirable change (iv) Fast change
Answer» Question 9: Define the following terms: (i) Non-Periodic change (ii) Man-made change (iii) Desirable change (iv) Fast change

849.

Question 9:Define the following terms:(i) Non-Periodic change (ii) Man-made change(iii) Desirable change (iv) Fast change

Answer»

Question 9:

Define the following terms:

(i) Non-Periodic change

(ii) Man-made change

(iii) Desirable change

(iv) Fast change

Discussion

850.	Deduce the number of neutrons from the atomic number (Z) and mass number (A).
Answer» Deduce the number of neutrons from the atomic number (Z) and mass number (A).

Discussion

Explore topic-wise InterviewSolutions in .

Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached. 1P1, 0n1, −1e0

An element E forms an oxide EO².write the valency of E and chemical formula of its chloride.

How many molecules there in O2 ?

State two characteristics of matter demonstrated by :Brownian motion.

Are the compounds that show John teller distortion more stable than those which do not show John teller distortion?

What is full form of CFC?

How to calculate the n factor of the following reactionCaOCl2 + H2O +2KI = Ca(OH)2 + I2 +2 KCl

Fill in the following blanks in respect of an atom of an element : Number of protonsNumber of neutronsMass numberAtomic numberNumber of electronsValency1112−−−−−−−−

Paheli bought a statue made of copper. To her surprise, it acquired a dull green coating after a couple of months. Explain the reason.

Which of the following are 'pure substances' ? Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air

17. In a reaction, 2X gives Y , the concentation of X decreases from 0.50M to 0.38M in 10 min. What is the rate of reaction in M per second during this interval??

Why don't electrons in shells radiate energy?

Which amongst the following chemicals is used in preliminary tests for anions?

What is the differences between Molar mass and Molecular mass? What is the formula for finding Molar mass and Molecular mass??

11. The mass of CaCO3 produed when CO2 is bubbled through 500mL of 0.5 M Ca(OH)2 solution will be

Which of the following statements are true about electronegativity in the periodic table?

Why don’t stains erase when washed with water alone?

In Acidic medium moles of KMnO4 required to oxidise 1.5 moles of Cu2S will be :- 1 ) 1.2 mole 2) 1.6 mole 3) 2.1 mole 4) 2.4 mole

What is a mixture, and how is it different from a compound?

Complex in which central atom contain minimum electron in valence shell(1) [Co(CO)4]+(2) [Mn(CO)5]-(3) [V(CO)6](4) [Cr(CO)6]

Compare the properties of electrons, protons and neutrons.

Question 1What do you mean by catenation?

In the reaction 4A+2B+3C = A4 B2​​​​​​​ C3 ​​​​​​​what will be the number of moles of product formed, starting from 1 mole of A , 0.6 mole of B and 0.72 mole of C?

A mixture of CO and CO_2 is found to have density 1.5gm/L at 27^0C and 760 torr pressure. Then composition of mixture in percentage of CO and CO_2 respectively will be (1) 10.3,89.7 (2) 44.1,55.9 (3) 84,16 (4) 50,50

Amongacetic acid, phenol and n-hexanol, which of the compound(S) will react withNaHCO3 solution to give sodium salt and CO2?

When cinnabar is heated in air, the gas evolved is:

An organic compound contains 75% carbon and 25% hydrogen. The empirical formula of the compound would be:

25. Which of following is an oxidizing agent ? (a)Mn(CO)_5 (b)Fe(CO)_5 (c)Mn_2(CO)_{10} (d)Fe_2(CO)_9

At room temperature the rms speed of the molecules of a certain diatomic gas is found to be 1920 m/s. The gas is

Find the number of oxygen atoms in 126 g of HNO3.

58.There is a line given that :- Besides dipole dipole interactions, polar molecules can also interact by London forces. Thus the total intermolecular force in polar molecules increases. But How? London forces are present in between the temporary dipoles .

(a) What is an Ion?(b) Differentiate between cations and anions?

60. 32g of sulphur react with 32g of oxygen even if more than 32g of sulphur are available.Which law of chemical combination does this illustrate?

the molecular weight of an oxide of chlorine is 182g/mol.Determine the molecular formula of the compound.

Question 21The volume of 50 g of a substance is 20 cm3. If the density of water is 1 g cm−3, will the substance float or sink?

(i) State the various postulates of Dalton's atomic theory of matter.(ii) Which postulates of Dalton's atomic theory can explain the law of conservation of mass?​(iii) Which postulate of Dalton's atomic theory can explain the law of constant proportions?

According to the octet rule an atom can have maximum ______ valence electron in its outermost shell. 8

An atom has 2 electron in K shell ,8electron in L shell and 8 electron in M shell .The number f s electron present in the element is

What is a boss Einstein condensate

Glass wares are wrapped in straw during their transportation.give reason.

In an experiment, 100 ml of ozonised oxygen was reduced to 60 ml when treated with turpentine. What would be the increase in volume if the original sample was heated until no further change occured ?(All volumes were measured under identical conditions). ?

Two radioactive materials A and B have decay cons†an ts 4 Lambda and lambda respectively. If initially they have 2N and N nuclei respectively then the timebat which they have same numner of nuclei

What is the Lewis dot structure of beryllium fluoride??

One of the following does not show Tyndall effect. This one is: (a) soap solution (b) ink (c) sugar solution (d) starch solution

What is least count when we are talking about accuracy and precision

Question 9:Define the following terms:(i) Non-Periodic change (ii) Man-made change(iii) Desirable change (iv) Fast change

Deduce the number of neutrons from the atomic number (Z) and mass number (A).

In the reaction 4A+2B+3C = A4 B2 C3 what will be the number of moles of product formed, starting from 1 mole of A , 0.6 mole of B and 0.72 mole of C?

(i) State the various postulates of Dalton's atomic theory of matter.(ii) Which postulates of Dalton's atomic theory can explain the law of conservation of mass?(iii) Which postulate of Dalton's atomic theory can explain the law of constant proportions?