10223 + Interview Questions in Chemistry Page 146 InterviewSolution

7251.	3 litres of dry gas was taken at a pressure of 10kg/cm2 at a constant temperature. What will be the change in volume if we increase the pressure from 10kg/cm2 to 40kg/cm2?
Answer» 3 litres of dry gas was taken at a pressure of 10kg/cm² at a constant temperature. What will be the change in volume if we increase the pressure from 10kg/cm² to 40kg/cm²?

Discussion

7252.	What is the anomalous expansion of water? Please explain.
Answer» What is the anomalous expansion of water? Please explain.

Discussion

7253.	Question 1 (iv) Write down the formulae of: (iv) Magnesium hydroxide
Answer» Question 1 (iv) Write down the formulae of: (iv) Magnesium hydroxide

Discussion

7254.	Which among the following uses the given idiom correctly? ‘Can’t hold a candle to’
Answer» Which among the following uses the given idiom correctly? ‘Can’t hold a candle to’

7254.

Which among the following uses the given idiom correctly? ‘Can’t hold a candle to’

Answer»

Which among the following uses the given idiom correctly?

‘Can’t hold a candle to’

Discussion

7255.	What's are the solute and solvent present in a tincture of iodine?
Answer» What's are the solute and solvent present in a tincture of iodine?

Discussion

7256.	A solution is said to be ___ if it can hold more of the solute in the given solvent at that temperature.
Answer» A solution is said to be ___ if it can hold more of the solute in the given solvent at that temperature.

Discussion

7257.	Give reason : why do not solids posses fluidity
Answer» Give reason : why do not solids posses fluidity

Discussion

7258.	Write a note on the molecular structure of liquids. [5 MARKS]
Answer» Write a note on the molecular structure of liquids. [5 MARKS]

Discussion

7259.	Explain three factors that affect the solubility of solvent and solute. [3 MARKS]
Answer» Explain three factors that affect the solubility of solvent and solute. [3 MARKS]

Discussion

7260.	Consider the reaction, A → B. Rate of reaction = + d[B]dt . Which of the following statement(s) defines the positive sign used in the rate of the given reaction?
Answer» Consider the reaction, A $\to$ B. Rate of reaction = + $\frac{d [B]}{d t}$ . Which of the following statement(s) defines the positive sign used in the rate of the given reaction?

Discussion

7261.	Question 2 (a) Convert the following temperatures to the Kelvin scale. (a)25∘C
Answer» Question 2 (a) Convert the following temperatures to the Kelvin scale. $(a) 25^{\circ} C$

Discussion

7262.	When common salt is dissolved in water –
Answer» When common salt is dissolved in water –

Discussion

7263.	If the number of electrons in a neutral atom is 6 and the number of neutrons is 8. Then the atomic mass of that element will be ___.
Answer» If the number of electrons in a neutral atom is 6 and the number of neutrons is 8. Then the atomic mass of that element will be ___.

Discussion

7264.	The sea water is denser than fresh water due to
Answer» The sea water is denser than fresh water due to

Discussion

7265.	Match the following catalysts with their usage: CatalystUsage1. Manganese dioxideA. Converts starch into maltose2. IronB. Decomposition of hydrogen peroxide3. AmylaseC. Manufacture of ammonia
Answer» Match the following catalysts with their usage: $\begin{matrix} C a t a l y s t & U s a g e 1. Manganese dioxide & A. Converts starch into maltose 2. Iron & B. Decomposition of hydrogen peroxide 3. Amylase & C. Manufacture of ammonia \end{matrix}$

7265.

Match the following catalysts with their usage: CatalystUsage1. Manganese dioxideA. Converts starch into maltose2. IronB. Decomposition of hydrogen peroxide3. AmylaseC. Manufacture of ammonia

Answer»

Match the following catalysts with their usage:

$\begin{matrix} C a t a l y s t & U s a g e 1. Manganese dioxide & A. Converts starch into maltose 2. Iron & B. Decomposition of hydrogen peroxide 3. Amylase & C. Manufacture of ammonia \end{matrix}$

Discussion

7266.	Name the temperature scale used in S.I system.
Answer» Name the temperature scale used in S.I system.

Discussion

7267.	How many bonds are formed between two atoms with 4 shared electrons?
Answer» How many bonds are formed between two atoms with 4 shared electrons?

Discussion

7268.	Question 14 For the following statements, write T for True and F for False. (a) J.J. Thomson proposed that the nucleus of an atom contains only nucleons. (b) A neutron is formed by an electron and a proton combining together. Therefore, it is neutral. (c) The mass of an electron is about 12000 times that of proton. (d) An isotope of iodine is used for making tincture iodine, which is used as a medicine.
Answer» Question 14 For the following statements, write T for True and F for False. (a) J.J. Thomson proposed that the nucleus of an atom contains only nucleons. (b) A neutron is formed by an electron and a proton combining together. Therefore, it is neutral. (c) The mass of an electron is about $\frac{1}{2000}$ times that of proton. (d) An isotope of iodine is used for making tincture iodine, which is used as a medicine.

Discussion

7269.	Which of the following is not an application of nitric acid?
Answer» Which of the following is not an application of nitric acid?

Discussion

7270.	Question 8 (a) Identify the solutions among the following mixtures. a. Soil
Answer» Question 8 (a) Identify the solutions among the following mixtures. a. Soil

Discussion

7271.	Elements X and Y form an ionic compound. Name the compound formed by X and Y. (Atomic number of X is 11 and Y is 9)
Answer» Elements X and Y form an ionic compound. Name the compound formed by X and Y. (Atomic number of X is 11 and Y is 9)

Discussion

7272.	The electron which take part in order to exhibit variable Oxidation states by Transition metals are
Answer» The electron which take part in order to exhibit variable Oxidation states by Transition metals are

Discussion

7273.	Zinc is obtained from zinc oxide by the process of:
Answer» Zinc is obtained from zinc oxide by the process of:

Discussion

7274.	Why there's a difference in mass number between 1 mole of Na and 1 mole Ca?
Answer» Why there's a difference in mass number between 1 mole of Na and 1 mole Ca?

Discussion

7275.	What are isotopes? Name the three isotopes of hydrogen.
Answer» What are isotopes? Name the three isotopes of hydrogen.

Discussion

7276.	Gases filled the entire space of the container why?
Answer» Gases filled the entire space of the container why?

Discussion

7277.	(a) write the separation of the components of mixture of sand, common salt and ammonium chloride. (b) why do we use glycerin instead of water to prepare a temporary mount?
Answer» (a) write the separation of the components of mixture of sand, common salt and ammonium chloride. (b) why do we use glycerin instead of water to prepare a temporary mount?

7277.

(a) write the separation of the components of mixture of sand, common salt and ammonium chloride. (b) why do we use glycerin instead of water to prepare a temporary mount?

Answer»

(a) write the separation of the components of mixture of sand, common salt and ammonium chloride.

(b) why do we use glycerin instead of water to prepare a temporary mount?

Discussion

7278.	Which of the following is not a physical property of water?
Answer» Which of the following is not a physical property of water?

Discussion

7279.	The electron configuration of phosphorus is 2,8,5 but the valency of phosphorus is 1- ..how?
Answer» The electron configuration of phosphorus is 2,8,5 but the valency of phosphorus is 1- ..how?

Discussion

7280.	Milk is churned to separate cream from it. Why?
Answer» Milk is churned to separate cream from it. Why?

Discussion

7281.	Who found the Tyndall effect
Answer» Who found the Tyndall effect

Discussion

7282.	Ice placed in water is which kind of mixture? Explain
Answer» Ice placed in water is which kind of mixture? Explain

7282.

Ice placed in water is which kind of mixture? Explain

Answer»

Ice placed in water is which kind of mixture?

Explain

Discussion

7283.	What is capillarity?
Answer» What is capillarity?

Discussion

7284.	What is the difference between molar mass and molecular mass
Answer» What is the difference between molar mass and molecular mass

Discussion

7285.	Zinc + _______ → Zinc oxide.
Answer» Zinc + _______ $\to$ Zinc oxide.

Discussion

7286.	Rita was conducting an experiment . She has a plate containing some water. In which place she has put a lit candle stick. Then she covers the candle stick with the glass so that the candlesticks drops burning. After this she sees that the water in the plate has gone into the glass. Why did the water move into the glass?
Answer» Rita was conducting an experiment . She has a plate containing some water. In which place she has put a lit candle stick. Then she covers the candle stick with the glass so that the candlesticks drops burning. After this she sees that the water in the plate has gone into the glass. Why did the water move into the glass?

Discussion

7287.	Fill in the following blanks with suitable words : (a) An element is made up of only one kind of ___ (b) Brine is a ___ whereas alcohol is a ___ (c) Brass is an alloy which is considered a ___ (d) The three important metalloids are ___, ___ and___ (e) The elements which are sonorous are called___
Answer» Fill in the following blanks with suitable words : (a) An element is made up of only one kind of ___ (b) Brine is a ___ whereas alcohol is a ___ (c) Brass is an alloy which is considered a ___ (d) The three important metalloids are ___, ___ and___ (e) The elements which are sonorous are called___

7287.

Fill in the following blanks with suitable words : (a) An element is made up of only one kind of _ (b) Brine is a _ whereas alcohol is a _ (c) Brass is an alloy which is considered a _ (d) The three important metalloids are _, _ and_ (e) The elements which are sonorous are called_

Answer»

Fill in the following blanks with suitable words :

(a) An element is made up of only one kind of ___

(b) Brine is a ___ whereas alcohol is a ___

(c) Brass is an alloy which is considered a ___

(d) The three important metalloids are ___, ___ and___

(e) The elements which are sonorous are called___

Discussion

7288.	The boiling point of water on kelvin scale is :
Answer» The boiling point of water on kelvin scale is :

Discussion

7289.	Question 11 Which of the following are chemical changes? a. Growth of a plant b. Rusting of iron c. Mixing of iron filings and sand d. Cooking of food e. Digestion of food f. Freezing of water g. Burning of a candle
Answer» Question 11 Which of the following are chemical changes? a. Growth of a plant b. Rusting of iron c. Mixing of iron filings and sand d. Cooking of food e. Digestion of food f. Freezing of water g. Burning of a candle

Discussion

7290.	Which of the following is used to revive exhausted permutit?
Answer» Which of the following is used to revive exhausted permutit?

Discussion

7291.	Liguids have lower density than water.Then why ice floats on water?
Answer» Liguids have lower density than water.Then why ice floats on water?

Discussion

7292.	Latent heat of vaporization of 2 liquids A and B is 100j/kg and150j/kg respectively.Which can produce more cooling effect and why?
Answer» Latent heat of vaporization of 2 liquids A and B is 100j/kg and150j/kg respectively.Which can produce more cooling effect and why?

Discussion

7293.	The pollutants released from air conditioners and refrigerators affects ______________.
Answer» The pollutants released from air conditioners and refrigerators affects ______________.

Discussion

7294.	Observe the following picture carefully. What will happen if we continue heating the blue ink till the residue is left?
Answer» Observe the following picture carefully. What will happen if we continue heating the blue ink till the residue is left?

7294.

Observe the following picture carefully. What will happen if we continue heating the blue ink till the residue is left?

Answer»

Observe the following picture carefully. What will happen if we continue heating the blue ink till the residue is left?

Discussion

7295.	Elements of Actinoid series have general outer electronic configuration of:
Answer» Elements of Actinoid series have general outer electronic configuration of:

Discussion

7296.	You are watching a movie which has artificial clouds, then which of the following is used in those clouds?
Answer» You are watching a movie which has artificial clouds, then which of the following is used in those clouds?

Discussion

7297.	A solution is prepared by mixing 25g common salt in 125g of water . Determine the concentration of solution in m/m% .
Answer» A solution is prepared by mixing 25g common salt in 125g of water . Determine the concentration of solution in m/m% .

Discussion

7298.	In the laboratory preparation of nitric acid, it can be obtained below 200∘C or above 200∘C, but the lower temperature is preferred. Which of the following reason(s) is /are correct? i. The glass apparatus may break at a higher temperature. ii. At lower temperature, potassium or sodium sulphate is formed, which cannot be easily removed from the apparatus. iii. Some quantity of nitric acid gets decomposed at a higher temperature.
Answer» In the laboratory preparation of nitric acid, it can be obtained below $200^{\circ}$ C or above $200^{\circ}$ C, but the lower temperature is preferred. Which of the following reason(s) is /are correct? i. The glass apparatus may break at a higher temperature. ii. At lower temperature, potassium or sodium sulphate is formed, which cannot be easily removed from the apparatus. iii. Some quantity of nitric acid gets decomposed at a higher temperature.

7298.

In the laboratory preparation of nitric acid, it can be obtained below 200∘C or above 200∘C, but the lower temperature is preferred. Which of the following reason(s) is /are correct? i. The glass apparatus may break at a higher temperature. ii. At lower temperature, potassium or sodium sulphate is formed, which cannot be easily removed from the apparatus. iii. Some quantity of nitric acid gets decomposed at a higher temperature.

Answer»

In the laboratory preparation of nitric acid, it can be obtained below $200^{\circ}$ C or above $200^{\circ}$ C, but the lower temperature is preferred. Which of the following reason(s) is /are correct?

i. The glass apparatus may break at a higher temperature.

ii. At lower temperature, potassium or sodium sulphate is formed, which cannot be easily removed from the apparatus.

iii. Some quantity of nitric acid gets decomposed at a higher temperature.

Discussion

7299.	Why does it take less time to cook food in a pressure cooker
Answer» Why does it take less time to cook food in a pressure cooker

Discussion

7300.	1. Give an example of a chemical change which is accompanied by the evolution of heat light and sound energy. 2. The substance which loses electrons is said to be______ whereas the one which gains electrons is said to be_____
Answer» 1. Give an example of a chemical change which is accompanied by the evolution of heat light and sound energy. 2. The substance which loses electrons is said to be______ whereas the one which gains electrons is said to be_____

7300.

1. Give an example of a chemical change which is accompanied by the evolution of heat light and sound energy. 2. The substance which loses electrons is said to be__ whereas the one which gains electrons is said to be_

Answer»

1. Give an example of a chemical change which is accompanied by the evolution of heat light and sound energy.

2. The substance which loses electrons is said to be______ whereas the one which gains electrons is said to be_____

Discussion

Explore topic-wise InterviewSolutions in .

3 litres of dry gas was taken at a pressure of 10kg/cm2 at a constant temperature. What will be the change in volume if we increase the pressure from 10kg/cm2 to 40kg/cm2?

What is the anomalous expansion of water? Please explain.

Question 1 (iv) Write down the formulae of: (iv) Magnesium hydroxide

Which among the following uses the given idiom correctly? ‘Can’t hold a candle to’

What's are the solute and solvent present in a tincture of iodine?

A solution is said to be ___ if it can hold more of the solute in the given solvent at that temperature.

Give reason : why do not solids posses fluidity

Write a note on the molecular structure of liquids. [5 MARKS]

Explain three factors that affect the solubility of solvent and solute. [3 MARKS]

Consider the reaction, A → B. Rate of reaction = + d[B]dt . Which of the following statement(s) defines the positive sign used in the rate of the given reaction?

Question 2 (a) Convert the following temperatures to the Kelvin scale. (a)25∘C

When common salt is dissolved in water –

If the number of electrons in a neutral atom is 6 and the number of neutrons is 8. Then the atomic mass of that element will be ___.

The sea water is denser than fresh water due to

Match the following catalysts with their usage: CatalystUsage1. Manganese dioxideA. Converts starch into maltose2. IronB. Decomposition of hydrogen peroxide3. AmylaseC. Manufacture of ammonia

Name the temperature scale used in S.I system.

How many bonds are formed between two atoms with 4 shared electrons?

Which of the following is not an application of nitric acid?

Question 8 (a) Identify the solutions among the following mixtures. a. Soil

Elements X and Y form an ionic compound. Name the compound formed by X and Y. (Atomic number of X is 11 and Y is 9)

The electron which take part in order to exhibit variable Oxidation states by Transition metals are

Zinc is obtained from zinc oxide by the process of:

Why there's a difference in mass number between 1 mole of Na and 1 mole Ca?

What are isotopes? Name the three isotopes of hydrogen.

Gases filled the entire space of the container why?

(a) write the separation of the components of mixture of sand, common salt and ammonium chloride. (b) why do we use glycerin instead of water to prepare a temporary mount?

Which of the following is not a physical property of water?

The electron configuration of phosphorus is 2,8,5 but the valency of phosphorus is 1- ..how?

Milk is churned to separate cream from it. Why?

Who found the Tyndall effect

Ice placed in water is which kind of mixture? Explain

What is capillarity?

What is the difference between molar mass and molecular mass

Zinc + _______ → Zinc oxide.

Fill in the following blanks with suitable words : (a) An element is made up of only one kind of ___ (b) Brine is a ___ whereas alcohol is a ___ (c) Brass is an alloy which is considered a ___ (d) The three important metalloids are ___, ___ and___ (e) The elements which are sonorous are called___

The boiling point of water on kelvin scale is :

Question 11 Which of the following are chemical changes? a. Growth of a plant b. Rusting of iron c. Mixing of iron filings and sand d. Cooking of food e. Digestion of food f. Freezing of water g. Burning of a candle

Which of the following is used to revive exhausted permutit?

Liguids have lower density than water.Then why ice floats on water?

Latent heat of vaporization of 2 liquids A and B is 100j/kg and150j/kg respectively.Which can produce more cooling effect and why?

The pollutants released from air conditioners and refrigerators affects ______________.

Observe the following picture carefully. What will happen if we continue heating the blue ink till the residue is left?

Elements of Actinoid series have general outer electronic configuration of:

You are watching a movie which has artificial clouds, then which of the following is used in those clouds?

A solution is prepared by mixing 25g common salt in 125g of water . Determine the concentration of solution in m/m% .

Why does it take less time to cook food in a pressure cooker

1. Give an example of a chemical change which is accompanied by the evolution of heat light and sound energy. 2. The substance which loses electrons is said to be______ whereas the one which gains electrons is said to be_____

Fill in the following blanks with suitable words : (a) An element is made up of only one kind of _ (b) Brine is a _ whereas alcohol is a _ (c) Brass is an alloy which is considered a _ (d) The three important metalloids are _, _ and_ (e) The elements which are sonorous are called_

1. Give an example of a chemical change which is accompanied by the evolution of heat light and sound energy. 2. The substance which loses electrons is said to be__ whereas the one which gains electrons is said to be_