5083 + Interview Questions in Chemistry Page 71 InterviewSolution

3501.	A slice of apple acquires a brown colour if it is not consumed immediately, explain.
Answer» A slice of apple acquires a brown colour if it is not consumed immediately, explain.

Discussion

3502.	Which separation technique is used to separate iron powder from a mixture of iron and aluminium powder?
Answer» Which separation technique is used to separate iron powder from a mixture of iron and aluminium powder?

Discussion

3503.	In most cases, for a rise of 10K temperature, the rate constant is doubled or tripled. This is due to the reason that ?
Answer» In most cases, for a rise of 10K temperature, the rate constant is doubled or tripled. This is due to the reason that ?

Discussion

3504.	Chemical pollutants in water includes:
Answer» Chemical pollutants in water includes:

Discussion

3505.	Defination of matter
Answer» Defination of matter

Discussion

3506.	Give an example of salt other than table salt
Answer» Give an example of salt other than table salt

Discussion

3507.	The half-life period of a first order chemical reaction is 6.93 minutes. The time required for 99% completion of reaction will be (log 2 = 0.301)
Answer» The half-life period of a first order chemical reaction is 6.93 minutes. The time required for 99% completion of reaction will be (log 2 = 0.301)

Discussion

3508.	Question 1 (c) Mark ‘T’ if the statement is true and ‘F’ if it is false. (c) Water from rivers is the only source for irrigation in the fields. (T/F)
Answer» Question 1 (c) Mark ‘T’ if the statement is true and ‘F’ if it is false. (c) Water from rivers is the only source for irrigation in the fields. (T/F)

Discussion

3509.	Which of the following is/are correct about soil?
Answer» Which of the following is/are correct about soil?

Discussion

3510.	What are the characteristics of Nitrated Cotton or Nitro - Cellulose?
Answer» What are the characteristics of Nitrated Cotton or Nitro - Cellulose?

Discussion

3511.	Changes in which new substances are formed are called __ changes.
Answer» Changes in which new substances are formed are called __ changes.

Discussion

3512.	The layer of soil which is not rich in humus but rich in minerals is ___ .
Answer» The layer of soil which is not rich in humus but rich in minerals is ___ .

Discussion

3513.	Metals have a property which helps them to get beaten into thin sheets. This is because of the ability of the atoms to roll over each other into new positions without breaking the metallic bond. What is this property of metals known as?
Answer» Metals have a property which helps them to get beaten into thin sheets. This is because of the ability of the atoms to roll over each other into new positions without breaking the metallic bond. What is this property of metals known as?

Discussion

3514.	When the popular actor died [A] / had died [B]the Chief Minister himself condoled the family and placed a wreathe [A] / wreath [B]on the body. The sceptic [A] / septic [B]refused to believe that the house was haunted.In a bid to get control of herself after the terrible tragedy her mind sheared [A] / sheered [B] away from all unwelcome or unpleasant images. The power meter [A] / metre [B]appeared to be faulty since consumption was low but bills were high
Answer» When the popular actor died [A] / had died [B]the Chief Minister himself condoled the family and placed a wreathe [A] / wreath [B]on the body. The sceptic [A] / septic [B]refused to believe that the house was haunted.In a bid to get control of herself after the terrible tragedy her mind sheared [A] / sheered [B] away from all unwelcome or unpleasant images. The power meter [A] / metre [B]appeared to be faulty since consumption was low but bills were high

Discussion

3515.	Choose the endemic fauna of the Pachmarhi biosphere reserve from the list below:
Answer» Choose the endemic fauna of the Pachmarhi biosphere reserve from the list below:

Discussion

3516.	The weight of a body on earth is ____ than its weight on the moon.
Answer» The weight of a body on earth is ____ than its weight on the moon.

Discussion

3517.	Write the symbol of Gold, Aluminium, silver, potassium, sodium, calcium.
Answer» Write the symbol of Gold, Aluminium, silver, potassium, sodium, calcium.

Discussion

3518.	Is setting of a curd is a chemical change? Justify your answer.
Answer» Is setting of a curd is a chemical change? Justify your answer.

Discussion

3519.	Why do dead whales explode ?
Answer» Why do dead whales explode ?

Discussion

3520.	. Why step farming is the common agricultural practice in mountainous regions? How can overgrazing leads to soil erosion?
Answer» . Why step farming is the common agricultural practice in mountainous regions? How can overgrazing leads to soil erosion?

3520.

. Why step farming is the common agricultural practice in mountainous regions? How can overgrazing leads to soil erosion?

Answer»

. Why step farming is the common agricultural practice in mountainous regions?

How can overgrazing leads to soil erosion?

Discussion

3521.	Question 16 Classify the following processes into physical or chemical changes: (i) Beating of aluminium metal to make aluminium foil. (ii) Digestion of food. (iii) Cutting of a log of wood into pieces. (iv) Burning of crackers.
Answer» Question 16 Classify the following processes into physical or chemical changes: (i) Beating of aluminium metal to make aluminium foil. (ii) Digestion of food. (iii) Cutting of a log of wood into pieces. (iv) Burning of crackers.

3521.

Question 16 Classify the following processes into physical or chemical changes: (i) Beating of aluminium metal to make aluminium foil. (ii) Digestion of food. (iii) Cutting of a log of wood into pieces. (iv) Burning of crackers.

Answer»

Question 16

Classify the following processes into physical or chemical changes:

(i) Beating of aluminium metal to make aluminium foil.
(ii) Digestion of food.
(iii) Cutting of a log of wood into pieces.
(iv) Burning of crackers.

Discussion

3522.	Is drawing copper into a wire a chemical change or a physical change?
Answer» Is drawing copper into a wire a chemical change or a physical change?

Discussion

3523.	The temperature of a substance remains same during the change of state due to __________.
Answer» The temperature of a substance remains same during the change of state due to __________.

Discussion

3524.	Give a balanced chemical equation in which the product forms a dirty green precipitate
Answer» Give a balanced chemical equation in which the product forms a dirty green precipitate

Discussion

3525.	Which of the following soils would need more water?
Answer» Which of the following soils would need more water?

Discussion

3526.	Why does turmeric changes colour into red when we put lemon juice in it
Answer» Why does turmeric changes colour into red when we put lemon juice in it

Discussion

3527.	While measuring temperature of boiling water, Ravi found that the temperature to be 85 degree Celsius only. What is the reason for this
Answer» While measuring temperature of boiling water, Ravi found that the temperature to be 85 degree Celsius only. What is the reason for this

Discussion

3528.	The section of soil profile that is composed of dead and rotting remains of living plants and organisms is known as ___.
Answer» The section of soil profile that is composed of dead and rotting remains of living plants and organisms is known as ___.

Discussion

3529.	Iron is used in bridges and automobiles to provide strength. However a layer of zinc is plated on it. Name the process. Why is this done? [3 MARKS]
Answer» Iron is used in bridges and automobiles to provide strength. However a layer of zinc is plated on it. Name the process. Why is this done? [3 MARKS]

Discussion

3530.	Which of the following cannot be used as an acid-base indicator?
Answer» Which of the following cannot be used as an acid-base indicator?

Discussion

3531.	The brown fume coming out when lead nitrate is heated is due to the liberation of _____ gas.
Answer» The brown fume coming out when lead nitrate is heated is due to the liberation of _____ gas.

Discussion

3532.	Why do acids and bases nutralise each other
Answer» Why do acids and bases nutralise each other

Discussion

3533.	How to separate a mixture of sand,salt,water,oil, iron filings
Answer» How to separate a mixture of sand,salt,water,oil, iron filings

Discussion

3534.	Which of the following is the chemical name of water?
Answer» Which of the following is the chemical name of water?

Discussion

3535.	Silk fibres are made of
Answer» Silk fibres are made of

Discussion

3536.	What is sewage? How does sewage cause degeneration of water quality? [3 MARKS]
Answer» What is sewage? How does sewage cause degeneration of water quality? [3 MARKS]

Discussion

3537.	___ type of soil has a large proportion of big particles and large air spaces.
Answer» ___ type of soil has a large proportion of big particles and large air spaces.

Discussion

3538.	Indigo carmine is a chemical which imparts_______colour to the food substances.
Answer» Indigo carmine is a chemical which imparts_______colour to the food substances.

Discussion

3539.	Electric current is passed through an aqueous solution of the following. Which one shall decompose [NCERT 1972]
Answer» Electric current is passed through an aqueous solution of the following. Which one shall decompose [NCERT 1972]

3539.

Electric current is passed through an aqueous solution of the following. Which one shall decompose [NCERT 1972]

Answer»

Electric current is passed through an aqueous solution of the following. Which one shall decompose

[NCERT 1972]

Discussion

3540.	How shearing is helpful to sheep ?
Answer» How shearing is helpful to sheep ?

Discussion

3541.	If 250 ml of water percolates in a soil in 25 minutes, calculate the percolation rate of the soil.
Answer» If 250 ml of water percolates in a soil in 25 minutes, calculate the percolation rate of the soil.

Discussion

3542.	The standard units of conductivity or specific conductance [k] is Where S = Siemens cm = centimeter
Answer» The standard units of conductivity or specific conductance [k] is Where S = Siemens cm = centimeter

Discussion

3543.	Which of the following characteristics can't be determined by Molecular formula?
Answer» Which of the following characteristics can't be determined by Molecular formula?

Discussion

3544.	Which of the following describes the reaction between carbon dioxide and limewater?
Answer» Which of the following describes the reaction between carbon dioxide and limewater?

Discussion

3545.	Which of these formulae is/are incorrect?
Answer» Which of these formulae is/are incorrect?

Discussion

3546.	What is the diffrence between atoms and protons?
Answer» What is the diffrence between atoms and protons?

Discussion

3547.	Fill in the blanks. [3 MARKS] (a) Lemon juice and vinegar taste ___ because they contain ___. (b) When an acidic solution is mixed with a basic solution, they___ each other forming___and water. (c) Phenolphthalein gives___colour with lime water.
Answer» Fill in the blanks. [3 MARKS] (a) Lemon juice and vinegar taste ___ because they contain ___. (b) When an acidic solution is mixed with a basic solution, they___ each other forming___and water. (c) Phenolphthalein gives___colour with lime water.

Discussion

3548.	Kerosene stove involves both physical and chemical changes. Explain.
Answer» Kerosene stove involves both physical and chemical changes. Explain.

Discussion

3549.	Which of the following cannot be classified as matter?
Answer» Which of the following cannot be classified as matter?

Discussion

3550.	Examples of lactic acid
Answer» Examples of lactic acid

Discussion

Explore topic-wise InterviewSolutions in .

A slice of apple acquires a brown colour if it is not consumed immediately, explain.

Which separation technique is used to separate iron powder from a mixture of iron and aluminium powder?

In most cases, for a rise of 10K temperature, the rate constant is doubled or tripled. This is due to the reason that ?

Chemical pollutants in water includes:

Defination of matter

Give an example of salt other than table salt

The half-life period of a first order chemical reaction is 6.93 minutes. The time required for 99% completion of reaction will be (log 2 = 0.301)

Question 1 (c) Mark ‘T’ if the statement is true and ‘F’ if it is false. (c) Water from rivers is the only source for irrigation in the fields. (T/F)

Which of the following is/are correct about soil?

What are the characteristics of Nitrated Cotton or Nitro - Cellulose?

Changes in which new substances are formed are called __ changes.

The layer of soil which is not rich in humus but rich in minerals is ___ .

Metals have a property which helps them to get beaten into thin sheets. This is because of the ability of the atoms to roll over each other into new positions without breaking the metallic bond. What is this property of metals known as?

Choose the endemic fauna of the Pachmarhi biosphere reserve from the list below:

The weight of a body on earth is ____ than its weight on the moon.

Write the symbol of Gold, Aluminium, silver, potassium, sodium, calcium.

Is setting of a curd is a chemical change? Justify your answer.

Why do dead whales explode ?

. Why step farming is the common agricultural practice in mountainous regions? How can overgrazing leads to soil erosion?

Question 16 Classify the following processes into physical or chemical changes: (i) Beating of aluminium metal to make aluminium foil. (ii) Digestion of food. (iii) Cutting of a log of wood into pieces. (iv) Burning of crackers.

Is drawing copper into a wire a chemical change or a physical change?

The temperature of a substance remains same during the change of state due to __________.

Give a balanced chemical equation in which the product forms a dirty green precipitate

Which of the following soils would need more water?

Why does turmeric changes colour into red when we put lemon juice in it

While measuring temperature of boiling water, Ravi found that the temperature to be 85 degree Celsius only. What is the reason for this

The section of soil profile that is composed of dead and rotting remains of living plants and organisms is known as ___.

Iron is used in bridges and automobiles to provide strength. However a layer of zinc is plated on it. Name the process. Why is this done? [3 MARKS]

Which of the following cannot be used as an acid-base indicator?

The brown fume coming out when lead nitrate is heated is due to the liberation of _____ gas.

Why do acids and bases nutralise each other

How to separate a mixture of sand,salt,water,oil, iron filings

Which of the following is the chemical name of water?

Silk fibres are made of

What is sewage? How does sewage cause degeneration of water quality? [3 MARKS]

___ type of soil has a large proportion of big particles and large air spaces.

Indigo carmine is a chemical which imparts_______colour to the food substances.

Electric current is passed through an aqueous solution of the following. Which one shall decompose [NCERT 1972]

How shearing is helpful to sheep ?

If 250 ml of water percolates in a soil in 25 minutes, calculate the percolation rate of the soil.

The standard units of conductivity or specific conductance [k] is Where S = Siemens cm = centimeter

Which of the following characteristics can't be determined by Molecular formula?

Which of the following describes the reaction between carbon dioxide and limewater?

Which of these formulae is/are incorrect?

What is the diffrence between atoms and protons?

Fill in the blanks. [3 MARKS] (a) Lemon juice and vinegar taste ___ because they contain ___. (b) When an acidic solution is mixed with a basic solution, they___ each other forming___and water. (c) Phenolphthalein gives___colour with lime water.

Kerosene stove involves both physical and chemical changes. Explain.

Which of the following cannot be classified as matter?

Examples of lactic acid

Fill in the blanks. [3 MARKS] (a) Lemon juice and vinegar taste _ because they contain _. (b) When an acidic solution is mixed with a basic solution, they_ each other forming_and water. (c) Phenolphthalein gives___colour with lime water.