10223 + Interview Questions in Chemistry

1.	The rate of a chemical reaction doubles for every 10∘C rise of temperature. If the temperature is raised by 50∘C, the rate of the reaction increases by abouttimes.
Answer» The rate of a chemical reaction doubles for every $10^{\circ}$ C rise of temperature. If the temperature is raised by $50^{\circ}$ C, the rate of the reaction increases by abouttimes.

Discussion

2.	Natural abundances of 12C and 13C isotopes ofcarbon are 99% and 1% , respectively. Assumingthey only contribute to the mol. wt. of C,F the percentage of C,F having a molecular mass of4\lbrack KVPY SA 2013\rbrack101 is2) 98((1) 1.98(3) 0.198(4) 99
Answer» Natural abundances of 12C and 13C isotopes ofcarbon are 99% and 1% , respectively. Assumingthey only contribute to the mol. wt. of C,F the percentage of C,F having a molecular mass of4\lbrack KVPY SA 2013\rbrack101 is2) 98((1) 1.98(3) 0.198(4) 99

Discussion

3.	Q. निम्नलिखित कथनों पर विचार कीजिए:उपर्युक्त कथनों में से कौन-सा/से सही है/हैं?
Answer» Q. निम्नलिखित कथनों पर विचार कीजिए: उपर्युक्त कथनों में से कौन-सा/से सही है/हैं?

3.

Q. निम्नलिखित कथनों पर विचार कीजिए:उपर्युक्त कथनों में से कौन-सा/से सही है/हैं?

Answer»

Q. निम्नलिखित कथनों पर विचार कीजिए:

उपर्युक्त कथनों में से कौन-सा/से सही है/हैं?

Discussion

4.	In the equation 4M+8CN−+2H2O+O2→ 4[M(CN)2]+4OH−Identify metal M:
Answer» In the equation $4 M + 8 C N^{-} + 2 H_{2} O + O_{2} \to 4 [M (C N)_{2}] + 4 O H^{-}$ Identify metal M:

Discussion

5.	Is histidine aromatic?
Answer» Is histidine aromatic?

Discussion

6.	18. About charge to mass ratio of electron
Answer» 18. About charge to mass ratio of electron

Discussion

7.	State two characteristics of water which prove that it is a - compound.
Answer» State two characteristics of water which prove that it is a - compound.

Discussion

8.	Each oxy-acid contains at least one X—OH unit (X is non-metal). The H-atom of X—OH unit is ionisable and the number of —OH groups directly attach to non-metal decides the basicity Of oxy acid.Which of the following hypoform of oxy-acid can exhibit tautomerism ?
Answer» Each oxy-acid contains at least one $X — O H$ unit ( $X$ is non-metal). The $H$ -atom of $X — O H$ unit is ionisable and the number of $— O H$ groups directly attach to non-metal decides the basicity Of oxy acid. Which of the following hypoform of oxy-acid can exhibit tautomerism ?

Discussion

9.	What is the temperature at which we get the same reading on both the Celsius and Fahrenheit scales ?
Answer» What is the temperature at which we get the same reading on both the Celsius and Fahrenheit scales ?

Discussion

10.	Explain the formation of scum when hard water is treated with soap.
Answer» Explain the formation of scum when hard water is treated with soap.

Discussion

11.	Select the options in which the elements given in the square bracket have the same oxidation number.
Answer» Select the options in which the elements given in the square bracket have the same oxidation number.

Discussion

12.	When a solution of sodium sulphate is added to a solution of barium chloride, a white precipitate appears. The white precipitate is due to formation of:
Answer» When a solution of sodium sulphate is added to a solution of barium chloride, a white precipitate appears. The white precipitate is due to formation of:

12.

When a solution of sodium sulphate is added to a solution of barium chloride, a white precipitate appears. The white precipitate is due to formation of:

Answer»

When a solution of sodium sulphate is added to a solution of barium chloride, a white precipitate appears. The white precipitate is due to formation of:

Discussion

13.	What are the various letters used by Bohr to represent electron shells in an atom?
Answer» What are the various letters used by Bohr to represent electron shells in an atom?

Discussion

14.	An example of reaction in which gas is evolved is:
Answer» An example of reaction in which gas is evolved is:

Discussion

15.	An alpha particle with kinetic energy T=5.3 MeV initiates a nuclear reactionBe94 + α42 →C126 + n10with energy yield Q=5.7 Mev. The kinetic enrgy of the neutron going at right angles to the direction of motion of the alpha particle will be (in MeV)
Answer» An alpha particle with kinetic energy $T = 5.3 M e V$ initiates a nuclear reaction $B e_{4}^{9} + α_{2}^{4} \to C_{6}^{12} + n_{0}^{1}$ with energy yield $Q = 5.7 M e v$ . The kinetic enrgy of the neutron going at right angles to the direction of motion of the alpha particle will be (in $M e V$ )

Discussion

16.	When pH paper is dipped in a solution, a light green colour is observed. What would be the pH value of the solution?
Answer» When pH paper is dipped in a solution, a light green colour is observed. What would be the pH value of the solution?

Discussion

17.	electrolysis of 50 percent h2so
Answer» electrolysis of 50 percent h2so

Discussion

18.	Name The Scientist Who Discovered Electron.
Answer» Name The Scientist Who Discovered Electron.

Discussion

19.	A body of mass 20 kg moves with an acceleration of 2 metre per second square calculate the change in momentum
Answer» A body of mass 20 kg moves with an acceleration of 2 metre per second square calculate the change in momentum

19.

A body of mass 20 kg moves with an acceleration of 2 metre per second square calculate the change in momentum

Answer»

A body of mass 20 kg moves with an acceleration of 2 metre per second square

calculate the change in momentum

Discussion

20.	Metals, except Al and Zn, react with oxygen to form _______ oxides.
Answer» Metals, except Al and Zn, react with oxygen to form _______ oxides.

Discussion

21.	difference between gram molecular mass and molecular mass
Answer» difference between gram molecular mass and molecular mass

Discussion

22.	The ratio of angular momentum in 3rd orbit to orbital angular momentum of 3d-orbital is
Answer» The ratio of angular momentum in 3rd orbit to orbital angular momentum of 3d-orbital is

Discussion

23.	if the linear speed of minute hand of a wall clock is 3.14*10^-4m/s,then,the length of the minute hand will be _?
Answer» if the linear speed of minute hand of a wall clock is 3.14*10^-4m/s,then,the length of the minute hand will be _?

Discussion

24.	Statement 1: Reaction of hydrochloric acid with a base forms salt and water. Statement 2: Reaction of hydrochloric acid with sodium hydroxide forms sodium chloride and water.
Answer» Statement 1: Reaction of hydrochloric acid with a base forms salt and water. Statement 2: Reaction of hydrochloric acid with sodium hydroxide forms sodium chloride and water.

24.

Statement 1: Reaction of hydrochloric acid with a base forms salt and water. Statement 2: Reaction of hydrochloric acid with sodium hydroxide forms sodium chloride and water.

Answer»

Statement 1: Reaction of hydrochloric acid with a base forms salt and water.

Statement 2: Reaction of hydrochloric acid with sodium hydroxide forms sodium chloride and water.

Discussion

25.	Why steel is used in railway tracks? Why not other metals?
Answer» Why steel is used in railway tracks? Why not other metals?

Discussion

26.	Calculate the reduction potential for the following half cell at 25o C.Mg(s)\|Mg2+(aq, 1×10−4M)E0Mg/Mg2+=+2.36 V
Answer» Calculate the reduction potential for the following half cell at $25^{o} C$ . $M g (s) \| M g^{2 +} (a q, 1 \times 10^{- 4} M) E_{M g / M g^{^{2 +}}}^{0} = + 2.36 V$

Discussion

27.	Derivation of second law of motion
Answer» Derivation of second law of motion

Discussion

28.	which of the following molecule has highest E.N and WHY?(A) XeF2(B) XeO3(C) XeF4
Answer» which of the following molecule has highest E.N and WHY? (A) XeF2 (B) XeO3 (C) XeF4

Discussion

29.	22. What is the trend of solubility of group 1 nitrates compared to the group 2 nitrates down the group?
Answer» 22. What is the trend of solubility of group 1 nitrates compared to the group 2 nitrates down the group?

Discussion

30.	51. What is pH of 10^{-10} M HCl solution 1)10 2)4 3)7 4)little more than 3
Answer» 51. What is pH of 10^{-10} M HCl solution 1)10 2)4 3)7 4)little more than 3

Discussion

31.	Oxygen molecule exhibits
Answer» Oxygen molecule exhibits

Discussion

32.	The simplest formula of a compound containing 50% of element X (Atomic weight = 10) and 50% of element Y (Atomic weight = 20) is ___
Answer» The simplest formula of a compound containing 50% of element X (Atomic weight = 10) and 50% of element Y (Atomic weight = 20) is ___

Discussion

33.	Which transition metal is called wonder metal ?
Answer» Which transition metal is called wonder metal ?

Discussion

34.	16.K2CO3 ka oxidation number
Answer» 16.K2CO3 ka oxidation number

Discussion

35.	What can you infer from the given symbol- 12Mg?
Answer» What can you infer from the given symbol- ₁₂Mg?

Discussion

36.	No.of electron in an atom with atomic no.105 having (n+l)=8 are
Answer» No.of electron in an atom with atomic no.105 having (n+l)=8 are

Discussion

37.	The S.I. unit of density is _____.
Answer» The S.I. unit of density is _____.

Discussion

38.	Explain the difference between Diamond and graphite.
Answer» Explain the difference between Diamond and graphite.

Discussion

39.	What do you understand by the following terms? (a) Acid radical (b) Basic radical
Answer» What do you understand by the following terms? (a) Acid radical (b) Basic radical

39.

What do you understand by the following terms? (a) Acid radical (b) Basic radical

Answer»

What do you understand by the following terms?

(a) Acid radical (b) Basic radical

Discussion

40.	Reason of lanthanoid contraction is-(1) Negligible screening effect of f orbitals (2) Increasing nuclear charge (3) Decreasing nuclear charge (4) Decreasing screening effectExplain between option 1 and 4
Answer» Reason of lanthanoid contraction is- (1) Negligible screening effect of f orbitals (2) Increasing nuclear charge (3) Decreasing nuclear charge (4) Decreasing screening effect Explain between option 1 and 4

Discussion

41.	Equivalent conductance of 0.1 M HA(weak acid) solution is 1Scm2equivalent−1 and that at infinite dilution is 1Scm2equivalent−1 Hence pH of HA solution is
Answer» Equivalent conductance of 0.1 M HA(weak acid) solution is $1 S c m^{2} e q u i v a l e n t - 1$ and that at infinite dilution is $1 S c m^{2} e q u i v a l e n t - 1$ Hence pH of HA solution is

Discussion

42.	If the difference between (n + 1)th Bohr radius and nth Bohr radius is equal to the (n - 1)th Bohr radius then find the value of n -4 -3 -2 -
Answer» If the difference between (n + 1)th Bohr radius and nth Bohr radius is equal to the (n - 1)th Bohr radius then find the value of n -4 -3 -2 -

Discussion

43.	How to make 500 ml of 70% v/v of ethyl alcohol
Answer» How to make 500 ml of 70% v/v of ethyl alcohol

Discussion

44.	Identify the conclusions from the Rutherford's alpha ray scattering experiment.
Answer» Identify the conclusions from the Rutherford's alpha ray scattering experiment.

Discussion

45.	State law of multiple proportions and define molar mass.
Answer» State law of multiple proportions and define molar mass.

Discussion

46.	What is the dimensional formula of pressure difference?Is it different from pressure?
Answer» What is the dimensional formula of pressure difference? Is it different from pressure?

Discussion

47.	(i) Define mole. What are the two things that a mole represents?(ii) What weight of each element is present 1.5 moles of sodium sulphite, Na2SO3? (Atomic masses: Na = 23u; S = 32 u; O = 16 u.)
Answer» (i) Define mole. What are the two things that a mole represents? (ii) What weight of each element is present 1.5 moles of sodium sulphite, Na₂SO₃? (Atomic masses: Na = 23u; S = 32 u; O = 16 u.)

Discussion

48.	Question 1: Write any two observations which support the fact that atoms are divisible.
Answer» Question 1: Write any two observations which support the fact that atoms are divisible.

Discussion

49.	M atom of an element A is 9gram.4M atom of another element is 45gram. (Atomic mass=30).Atomic mass ofA is?
Answer» M atom of an element A is 9gram.4M atom of another element is 45gram. (Atomic mass=30).Atomic mass ofA is?

Discussion

50.	How the melting point of a solid should be the same as the freezing point of the liquid of the same substance plz explain giving examples
Answer» How the melting point of a solid should be the same as the freezing point of the liquid of the same substance plz explain giving examples

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The rate of a chemical reaction doubles for every 10∘C rise of temperature. If the temperature is raised by 50∘C, the rate of the reaction increases by abouttimes.

Natural abundances of 12C and 13C isotopes ofcarbon are 99% and 1% , respectively. Assumingthey only contribute to the mol. wt. of C,F the percentage of C,F having a molecular mass of4\lbrack KVPY SA 2013\rbrack101 is2) 98((1) 1.98(3) 0.198(4) 99

Q. निम्नलिखित कथनों पर विचार कीजिए:उपर्युक्त कथनों में से कौन-सा/से सही है/हैं?

In the equation 4M+8CN−+2H2O+O2→ 4[M(CN)2]+4OH−Identify metal M:

Is histidine aromatic?

18. About charge to mass ratio of electron

State two characteristics of water which prove that it is a - compound.

Each oxy-acid contains at least one X—OH unit (X is non-metal). The H-atom of X—OH unit is ionisable and the number of —OH groups directly attach to non-metal decides the basicity Of oxy acid.Which of the following hypoform of oxy-acid can exhibit tautomerism ?

What is the temperature at which we get the same reading on both the Celsius and Fahrenheit scales ?

Explain the formation of scum when hard water is treated with soap.

Select the options in which the elements given in the square bracket have the same oxidation number.

When a solution of sodium sulphate is added to a solution of barium chloride, a white precipitate appears. The white precipitate is due to formation of:

What are the various letters used by Bohr to represent electron shells in an atom?

An example of reaction in which gas is evolved is:

An alpha particle with kinetic energy T=5.3 MeV initiates a nuclear reactionBe94 + α42 →C126 + n10with energy yield Q=5.7 Mev. The kinetic enrgy of the neutron going at right angles to the direction of motion of the alpha particle will be (in MeV)

When pH paper is dipped in a solution, a light green colour is observed. What would be the pH value of the solution?

electrolysis of 50 percent h2so

Name The Scientist Who Discovered Electron.

A body of mass 20 kg moves with an acceleration of 2 metre per second square calculate the change in momentum

Metals, except Al and Zn, react with oxygen to form _______ oxides.

difference between gram molecular mass and molecular mass

The ratio of angular momentum in 3rd orbit to orbital angular momentum of 3d-orbital is

if the linear speed of minute hand of a wall clock is 3.14*10^-4m/s,then,the length of the minute hand will be _?

Statement 1: Reaction of hydrochloric acid with a base forms salt and water. Statement 2: Reaction of hydrochloric acid with sodium hydroxide forms sodium chloride and water.

Why steel is used in railway tracks? Why not other metals?

Calculate the reduction potential for the following half cell at 25o C.Mg(s)|Mg2+(aq, 1×10−4M)E0Mg/Mg2+=+2.36 V

Derivation of second law of motion

which of the following molecule has highest E.N and WHY?(A) XeF2(B) XeO3(C) XeF4

22. What is the trend of solubility of group 1 nitrates compared to the group 2 nitrates down the group?

51. What is pH of 10^{-10} M HCl solution 1)10 2)4 3)7 4)little more than 3

Oxygen molecule exhibits

The simplest formula of a compound containing 50% of element X (Atomic weight = 10) and 50% of element Y (Atomic weight = 20) is ___

Which transition metal is called wonder metal ?

16.K2CO3 ka oxidation number

What can you infer from the given symbol- 12Mg?

No.of electron in an atom with atomic no.105 having (n+l)=8 are

The S.I. unit of density is _____.

Explain the difference between Diamond and graphite.

What do you understand by the following terms? (a) Acid radical (b) Basic radical

Reason of lanthanoid contraction is-(1) Negligible screening effect of f orbitals (2) Increasing nuclear charge (3) Decreasing nuclear charge (4) Decreasing screening effectExplain between option 1 and 4

Equivalent conductance of 0.1 M HA(weak acid) solution is 1Scm2equivalent−1 and that at infinite dilution is 1Scm2equivalent−1 Hence pH of HA solution is

If the difference between (n + 1)th Bohr radius and nth Bohr radius is equal to the (n - 1)th Bohr radius then find the value of n -4 -3 -2 -

How to make 500 ml of 70% v/v of ethyl alcohol

Identify the conclusions from the Rutherford's alpha ray scattering experiment.

State law of multiple proportions and define molar mass.

What is the dimensional formula of pressure difference?Is it different from pressure?

(i) Define mole. What are the two things that a mole represents?​(ii) What weight of each element is present 1.5 moles of sodium sulphite, Na2SO3? (Atomic masses: Na = 23u; S = 32 u; O = 16 u.)

Question 1: Write any two observations which support the fact that atoms are divisible.

M atom of an element A is 9gram.4M atom of another element is 45gram. (Atomic mass=30).Atomic mass ofA is?

How the melting point of a solid should be the same as the freezing point of the liquid of the same substance plz explain giving examples

(i) Define mole. What are the two things that a mole represents?(ii) What weight of each element is present 1.5 moles of sodium sulphite, Na2SO3? (Atomic masses: Na = 23u; S = 32 u; O = 16 u.)