5083 + Interview Questions in Chemistry Page 7 InterviewSolution

301.	14) 20 mL of 0.1 M HCl is divided into two equal parts and kept in two separate beakers. To one beaker 10 mL of0.06 M NAOH is added and to another 10 mL of 0.02 M NaOH is added. Two hydrogen electrodes are placed inthe two solutions which are linked through a salt bridge. The emf of the cell formed will be nearly-(a) 18 mV(b) 28 mV(d) 14 mV(c) 36 mV
Answer» 14) 20 mL of 0.1 M HCl is divided into two equal parts and kept in two separate beakers. To one beaker 10 mL of0.06 M NAOH is added and to another 10 mL of 0.02 M NaOH is added. Two hydrogen electrodes are placed inthe two solutions which are linked through a salt bridge. The emf of the cell formed will be nearly-(a) 18 mV(b) 28 mV(d) 14 mV(c) 36 mV

Discussion

302.	Which of the following is the source of the silk fibre?
Answer» Which of the following is the source of the silk fibre?

Discussion

303.	Which is more hard acids or bases
Answer» Which is more hard acids or bases

Discussion

304.	Name a natural source of tartaric acid. [1 MARK]
Answer» Name a natural source of tartaric acid. [1 MARK]

Discussion

305.	36.Number of neutron in Al3+?explain this?By rohan
Answer» 36.Number of neutron in Al3+?explain this?By rohan

Discussion

306.	Which of the following represents the cathode half cell reaction of a Daniel cell?
Answer» Which of the following represents the cathode half cell reaction of a Daniel cell?

Discussion

307.	Describe the different layers in soil profile.
Answer» Describe the different layers in soil profile.

Discussion

308.	The chemical formula of washing soda is:
Answer» The chemical formula of washing soda is:

Discussion

309.	C6H6 can show functional isomerism. Comment.
Answer» C6H6 can show functional isomerism. Comment.

Discussion

310.	Chapter wastewater story is not their My question is the ways of sanitation
Answer» Chapter wastewater story is not their My question is the ways of sanitation

Discussion

311.	A student adds a few drops of the universal indicator to a solution of dilute hydrochloric acid in the way shown here. He would observe that the colour of the solution changes form colourless to : (1) red(2) yellow(3) violet(4) green
Answer» A student adds a few drops of the universal indicator to a solution of dilute hydrochloric acid in the way shown here. He would observe that the colour of the solution changes form colourless to : (1) red (2) yellow (3) violet (4) green

Discussion

312.	Question 8 Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 ml of water to percolate through the soil sample. Calculate the rate of percolation.
Answer» Question 8 Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 ml of water to percolate through the soil sample. Calculate the rate of percolation.

Discussion

313.	What is meant by ‘atom’?
Answer» What is meant by ‘atom’?

Discussion

314.	The relation between standard free energy (ΔG∘) and standard emf (E∘cell) is (Given : n is the number of electrons involved and F is Faraday constant)
Answer» The relation between standard free energy $(Δ G^{\circ})$ and standard emf $(E_{c e l l}^{\circ})$ is (Given : $n$ is the number of electrons involved and $F$ is Faraday constant)

Discussion

315.	How are seeds dispersed by water? Give example. [2 MARKS]
Answer» How are seeds dispersed by water? Give example. [2 MARKS]

Discussion

316.	An element X forms an oxide XO3 what can be the valency of element X?
Answer» An element X forms an oxide $X O_{3}$ what can be the valency of element X?

Discussion

317.	What is meant by selective breeding?
Answer» What is meant by selective breeding?

Discussion

318.	Give the order of melting points among NaF,MgO, ScN, TiC.
Answer» Give the order of melting points among NaF,MgO, ScN, TiC.

Discussion

319.	Why do acids not show acidic behaviour in the absence of water?
Answer» Why do acids not show acidic behaviour in the absence of water?

Discussion

320.	A simple pendulum takes 32 seconds to complete 20 oscillations. What is the time period of the pendulum?
Answer» A simple pendulum takes 32 seconds to complete 20 oscillations. What is the time period of the pendulum?

Discussion

321.	What type of chemical reaction occurs in digestion?
Answer» What type of chemical reaction occurs in digestion?

Discussion

322.	Question 1 (c)Classify the following as chemical or physical changes:c. Rusting of almirah
Answer» Question 1 (c) Classify the following as chemical or physical changes: c. Rusting of almirah

Discussion

323.	What is the orbital configuration of excited state of oxygen and nitrogen?
Answer» What is the orbital configuration of excited state of oxygen and nitrogen?

Discussion

324.	is NO2 strong field ligand ?
Answer» is NO2 strong field ligand ?

Discussion

325.	What is dark reaction why is it called so
Answer» What is dark reaction why is it called so

Discussion

326.	Chassez l'intrus.1. prune/piment/pêche/pomme2. pain/viande/baguette/croissant3. huître/chou/radis/carotte4. éclair/poisson/fromage/brioche
Answer» Chassez l'intrus. 1. prune/piment/pêche/pomme 2. pain/viande/baguette/croissant 3. huître/chou/radis/carotte 4. éclair/poisson/fromage/brioche

Discussion

327.	When A = ϕ, then the number of elements in P(P(A)) is ____________.
Answer» When A = ϕ, then the number of elements in P(P(A)) is ____________.

Discussion

328.	1)Give two important effects of heat ? 2)a special kind of glass is used as ovenware for baking.what property should such glass have prevent it from breaking ?
Answer» 1)Give two important effects of heat ? 2)a special kind of glass is used as ovenware for baking.what property should such glass have prevent it from breaking ?

328.

1)Give two important effects of heat ? 2)a special kind of glass is used as ovenware for baking.what property should such glass have prevent it from breaking ?

Answer»

1)Give two important effects of heat ?

2)a special kind of glass is used as ovenware for baking.what property should such glass have prevent it from breaking

?

Discussion

329.	A first order reaction is 50% completed in 30 minutes at 27∘C and in 10 minutes at 47∘C. Calculate the energy of activation of the reaction in kJ mol−1.
Answer» A first order reaction is 50% completed in 30 minutes at $27^{\circ} C$ and in 10 minutes at $47^{\circ} C$ . Calculate the energy of activation of the reaction in ${kJ mol}^{- 1} .$

Discussion

330.	For a first order reaction, t99.99%=y×t90% Find the value of y.
Answer» For a first order reaction, $t_{99.99 %} = y \times t_{90 %}$ Find the value of y.

Discussion

331.	in the preparation of iron from haematite by the reaction with carbon Fe2O3 +C ---> Fe + CO2 how much 80% pure iron could be produced from 120kg of 90 % pure Fe2O3 ?
Answer» in the preparation of iron from haematite by the reaction with carbon Fe2O3 +C ---> Fe + CO2 how much 80% pure iron could be produced from 120kg of 90 % pure Fe2O3 ?

Discussion

332.	Write names of any three acid-base indicators. What are the changes in color observed when these indicators are added in acidic medium?
Answer» Write names of any three acid-base indicators. What are the changes in color observed when these indicators are added in acidic medium?

Discussion

333.	Zeolites are chemically
Answer» Zeolites are chemically

Discussion

334.	Which of the following is not an ex – situ conservation?
Answer» Which of the following is not an ex – situ conservation?

Discussion

335.	Why is air pumped into the clarified water? [2 MARKS]
Answer» Why is air pumped into the clarified water? [2 MARKS]

Discussion

336.	A rectangular glass plate of dimensions 5 cm x 4cm is placed flat on the surface of water. Find the downward force on the plate due to surface tension. Given surface tension of water = 0.073 Nm^{-1
Answer» A rectangular glass plate of dimensions 5 cm x 4cm is placed flat on the surface of water. Find the downward force on the plate due to surface tension. Given surface tension of water = 0.073 Nm^{-1

Discussion

337.	Turmeric stains turns into ___________ when washed with soap.
Answer» Turmeric stains turns into ___________ when washed with soap.

Discussion

338.	Explain the composition and properties of matter.
Answer» Explain the composition and properties of matter.

Discussion

339.	what is the n factor of K4[Fe(CN)6]?
Answer» what is the n factor of K4[Fe(CN)6]?

Discussion

340.	Give some examples of chemical reactions in which sound is produced
Answer» Give some examples of chemical reactions in which sound is produced

Discussion

341.	Write two important uses of coke.
Answer» Write two important uses of coke.

Discussion

342.

spoil sparrow school skirt scold sport speak scout skip skin

Answer»

spoil	sparrow	school	skirt	scold
sport	speak	scout	skip	skin

Discussion

343.	Sorter's disease is caused by:
Answer» Sorter's disease is caused by:

Discussion

344.

Match the following. Group ‘A’ Group ‘B’ (a) World Water Day 1. Canals (b) Rainwater harvesting 2. 22 March (c) Potable water 3. 20 August (d) Irrigation 4. Chlorination 5. Ground water level

Answer»

Match the following.

Group ‘A’		Group ‘B’
(a)	World Water Day	1.	Canals
(b)	Rainwater harvesting	2.	22 March
(c)	Potable water	3.	20 August
(d)	Irrigation	4.	Chlorination
		5.	Ground water level

Discussion

345.	Why do you rub baking soda or calamine solution when an ant bites us?
Answer» Why do you rub baking soda or calamine solution when an ant bites us?

Discussion

346.	The available space filled in hexagonal close packing pattern in one layer is 1. 40percent 2. 90.68 percent 3. 60.4 percent 4.70 percent
Answer» The available space filled in hexagonal close packing pattern in one layer is 1. 40percent 2. 90.68 percent 3. 60.4 percent 4.70 percent

Discussion

347.	The correct order of the products collected from the fractional distillation column from top to bottom is:
Answer» The correct order of the products collected from the fractional distillation column from top to bottom is:

Discussion

348.	Fill in the blanks in the given passage.The rainwater and from other sources such as rivers and ponds seeps through the and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called
Answer» Fill in the blanks in the given passage. The rainwater and from other sources such as rivers and ponds seeps through the and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called

Discussion

349.	Coin is made up of aluminium and weighs 0.75 gram it has a square shape and its diagonal measures 17mm. it is electrically neutral and contains equal amounts of positive and negative charges. the magnitude of these charges is (atomic mass of aluminium is equal to 26.9 8 gram)
Answer» Coin is made up of aluminium and weighs 0.75 gram it has a square shape and its diagonal measures 17mm. it is electrically neutral and contains equal amounts of positive and negative charges. the magnitude of these charges is (atomic mass of aluminium is equal to 26.9 8 gram)

Discussion

350.	Which of the following soils has the highest water retention capacity?
Answer» Which of the following soils has the highest water retention capacity?

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following is the source of the silk fibre?

Which is more hard acids or bases

Name a natural source of tartaric acid. [1 MARK]

36.Number of neutron in Al3+?explain this?By rohan

Which of the following represents the cathode half cell reaction of a Daniel cell?

Describe the different layers in soil profile.

The chemical formula of washing soda is:

C6H6 can show functional isomerism. Comment.

Chapter wastewater story is not their My question is the ways of sanitation

A student adds a few drops of the universal indicator to a solution of dilute hydrochloric acid in the way shown here. He would observe that the colour of the solution changes form colourless to : (1) red(2) yellow(3) violet(4) green

Question 8 Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 ml of water to percolate through the soil sample. Calculate the rate of percolation.

What is meant by ‘atom’?

The relation between standard free energy (ΔG∘) and standard emf (E∘cell) is (Given : n is the number of electrons involved and F is Faraday constant)

How are seeds dispersed by water? Give example. [2 MARKS]

An element X forms an oxide XO3 what can be the valency of element X?

What is meant by selective breeding?

Give the order of melting points among NaF,MgO, ScN, TiC.

Why do acids not show acidic behaviour in the absence of water?

A simple pendulum takes 32 seconds to complete 20 oscillations. What is the time period of the pendulum?

What type of chemical reaction occurs in digestion?

Question 1 (c)Classify the following as chemical or physical changes:c. Rusting of almirah

What is the orbital configuration of excited state of oxygen and nitrogen?

is NO2 strong field ligand ?

What is dark reaction why is it called so

Chassez l'intrus.1. prune/piment/pêche/pomme2. pain/viande/baguette/croissant3. huître/chou/radis/carotte4. éclair/poisson/fromage/brioche

When A = ϕ, then the number of elements in P(P(A)) is ____________.

1)Give two important effects of heat ? 2)a special kind of glass is used as ovenware for baking.what property should such glass have prevent it from breaking ?

A first order reaction is 50% completed in 30 minutes at 27∘C and in 10 minutes at 47∘C. Calculate the energy of activation of the reaction in kJ mol−1.

For a first order reaction, t99.99%=y×t90% Find the value of y.

in the preparation of iron from haematite by the reaction with carbon Fe2O3 +C ---> Fe + CO2 how much 80% pure iron could be produced from 120kg of 90 % pure Fe2O3 ?

Write names of any three acid-base indicators. What are the changes in color observed when these indicators are added in acidic medium?

Zeolites are chemically

Which of the following is not an ex – situ conservation?

Why is air pumped into the clarified water? [2 MARKS]

A rectangular glass plate of dimensions 5 cm x 4cm is placed flat on the surface of water. Find the downward force on the plate due to surface tension. Given surface tension of water = 0.073 Nm^{-1

Turmeric stains turns into ___________ when washed with soap.

Explain the composition and properties of matter.

what is the n factor of K4[Fe(CN)6]?

Give some examples of chemical reactions in which sound is produced

Write two important uses of coke.

spoil sparrow school skirt scold sport speak scout skip skin

Sorter's disease is caused by:

Match the following. Group ‘A’ Group ‘B’ (a) World Water Day 1. Canals (b) Rainwater harvesting 2. 22 March (c) Potable water 3. 20 August (d) Irrigation 4. Chlorination 5. Ground water level

Why do you rub baking soda or calamine solution when an ant bites us?

The available space filled in hexagonal close packing pattern in one layer is 1. 40percent 2. 90.68 percent 3. 60.4 percent 4.70 percent

The correct order of the products collected from the fractional distillation column from top to bottom is:

Fill in the blanks in the given passage.​The rainwater and from other sources such as rivers and ponds seeps through the and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called ​

Coin is made up of aluminium and weighs 0.75 gram it has a square shape and its diagonal measures 17mm. it is electrically neutral and contains equal amounts of positive and negative charges. the magnitude of these charges is (atomic mass of aluminium is equal to 26.9 8 gram)

Which of the following soils has the highest water retention capacity?

Fill in the blanks in the given passage.The rainwater and from other sources such as rivers and ponds seeps through the and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called