15280 + Interview Questions in Chemistry Page 224 InterviewSolution

11151.	The molecular mass of sodium hydroxide is 40. If 1 litre of sodium hydroxide solution is prepared by dissolving 12 g of it then the molarity of the solution will be:
Answer» The molecular mass of sodium hydroxide is 40. If 1 litre of sodium hydroxide solution is prepared by dissolving 12 g of it then the molarity of the solution will be:

Discussion

11152.	State two uses each of the following compounds : (a) Sodium hydroxide (b) Chlorine (c) Hydrogen (d) Hydrochloric acid
Answer» State two uses each of the following compounds : (a) Sodium hydroxide (b) Chlorine (c) Hydrogen (d) Hydrochloric acid

11152.

State two uses each of the following compounds : (a) Sodium hydroxide (b) Chlorine (c) Hydrogen (d) Hydrochloric acid

Answer»

State two uses each of the following compounds :

(a) Sodium hydroxide

(b) Chlorine

(c) Hydrogen

(d) Hydrochloric acid

Discussion

11153.	Cost of sugar (C12H22O11) is 40 kg : calculate its cost per mole.
Answer» Cost of sugar $(C_{12} H_{22} O_{11})$ is 40 kg : calculate its cost per mole.

Discussion

11154.	(a) Ca(H2PO4)2 is an example of a compound called __________________ (acid salt / basic salt / normal salt). (b) Write the balanced equation for the reaction of : A named acid and a named alkali.
Answer» (a) $C a (H_{2} P O_{4})_{2}$ is an example of a compound called __________________ (acid salt / basic salt / normal salt). (b) Write the balanced equation for the reaction of : A named acid and a named alkali.

11154.

(a) Ca(H2PO4)2 is an example of a compound called __________________ (acid salt / basic salt / normal salt). (b) Write the balanced equation for the reaction of : A named acid and a named alkali.

Answer»

(a) $C a (H_{2} P O_{4})_{2}$ is an example of a compound called __________________ (acid salt / basic salt / normal salt).

(b) Write the balanced equation for the reaction of : A named acid and a named alkali.

Discussion

11155.	Write the name and formula of one salt each which contains : (a) two molecules of water of crystallisation (b) five molecules of water of crystallisation (c) ten molecules of water of crystallisation
Answer» Write the name and formula of one salt each which contains : (a) two molecules of water of crystallisation (b) five molecules of water of crystallisation (c) ten molecules of water of crystallisation

11155.

Write the name and formula of one salt each which contains : (a) two molecules of water of crystallisation (b) five molecules of water of crystallisation (c) ten molecules of water of crystallisation

Answer»

Write the name and formula of one salt each which contains :

(a) two molecules of water of crystallisation

(b) five molecules of water of crystallisation

(c) ten molecules of water of crystallisation

Discussion

11156.	What is the difference between hydronium and hydroxyl?
Answer» What is the difference between hydronium and hydroxyl?

Discussion

11157.	Why is higher ratio of calcium hydroxide is taken (with ammonium chloride) in labrotary preparation of ammonia
Answer» Why is higher ratio of calcium hydroxide is taken (with ammonium chloride) in labrotary preparation of ammonia

Discussion

11158.	Which atom will show maximum electronegativity?
Answer» Which atom will show maximum electronegativity?

Discussion

11159.	Which of the following compounds has the highest melting point?
Answer» Which of the following compounds has the highest melting point?

Discussion

11160.	What is the correct formula of sulphuric acid?
Answer» What is the correct formula of sulphuric acid?

Discussion

11161.	What is aluminothermy and why it has to be done?
Answer» What is aluminothermy and why it has to be done?

Discussion

11162.	The product(s) formed in the following reaction is/are Zn+2KOH (hot conc.)→ ______
Answer» The product(s) formed in the following reaction is/are $Z n + 2 K O H (h o t c o n c .) \to$ ______

11162.

The product(s) formed in the following reaction is/are Zn+2KOH (hot conc.)→ ______

Answer»

The product(s) formed in the following reaction is/are

$Z n + 2 K O H (h o t c o n c .) \to$ ______

Discussion

11163.	What is the five steps mechanism of dehydration reaction
Answer» What is the five steps mechanism of dehydration reaction

Discussion

11164.	Question 40 Carbon, group (14) element in the Periodic Table, is known to form compounds with many elements. Write an example of a compound formed with (a) Chlorine (group 17 of Periodic Table) (b) Oxygen (group 16 of Periodic Table)
Answer» Question 40 Carbon, group (14) element in the Periodic Table, is known to form compounds with many elements. Write an example of a compound formed with (a) Chlorine (group 17 of Periodic Table) (b) Oxygen (group 16 of Periodic Table)

Discussion

11165.	Distinguish between mineral acid and organic acid
Answer» Distinguish between mineral acid and organic acid

Discussion

11166.	1 mol of CH4 contains
Answer» 1 mol of $C H_{4}$ contains

Discussion

11167.	Differentiate between a soap and a detergent on the basis of their chemical constituents. For cleansing action why is a detergent preferred to a soap ?
Answer» Differentiate between a soap and a detergent on the basis of their chemical constituents. For cleansing action why is a detergent preferred to a soap ?

Discussion

11168.	Why is it so that only small wavelengths of light are scattered? how can I visualize the lights wavelength?
Answer» Why is it so that only small wavelengths of light are scattered? how can I visualize the lights wavelength?

Discussion

11169.	Initially it was believed that atomic mass of beryllium was 13. but mendeleev suggested that its atomic mass should be 9. 1. was mendeleev suggestion correct? 2.how had he reached to this conclusion?
Answer» Initially it was believed that atomic mass of beryllium was 13. but mendeleev suggested that its atomic mass should be 9. 1. was mendeleev suggestion correct? 2.how had he reached to this conclusion?

11169.

Initially it was believed that atomic mass of beryllium was 13. but mendeleev suggested that its atomic mass should be 9. 1. was mendeleev suggestion correct? 2.how had he reached to this conclusion?

Answer»

Initially it was believed that atomic mass of beryllium was 13. but mendeleev suggested that its atomic mass should be 9.

1. was mendeleev suggestion correct?

2.how had he reached to this conclusion?

Discussion

11170.	What is the colour of universal indicator
Answer» What is the colour of universal indicator

Discussion

11171.	Differentiate between saturated and unsaturated hydrocarbons.
Answer» Differentiate between saturated and unsaturated hydrocarbons.

Discussion

11172.	Is Na2CO3.10H2O actually wet?
Answer» Is Na₂CO₃.10H₂O actually wet?

Discussion

11173.	Given below is the representation of a certain phenomenon in nature. with four organisms 1-4. (a) Name the phenomenon represented. (b) Name any one organism that could be shown at No. 5. (c) Name the biological process which was the starting point of the whole chain. (d) Name one natural element which all the organisms 2-4 and even 5 are getting from No. 1 for their survival.
Answer» Given below is the representation of a certain phenomenon in nature. with four organisms 1-4. (a) Name the phenomenon represented. (b) Name any one organism that could be shown at No. 5. (c) Name the biological process which was the starting point of the whole chain. (d) Name one natural element which all the organisms 2-4 and even 5 are getting from No. 1 for their survival.

11173.

Given below is the representation of a certain phenomenon in nature. with four organisms 1-4. (a) Name the phenomenon represented. (b) Name any one organism that could be shown at No. 5. (c) Name the biological process which was the starting point of the whole chain. (d) Name one natural element which all the organisms 2-4 and even 5 are getting from No. 1 for their survival.

Answer»

Given below is the representation of a certain phenomenon in nature. with four organisms 1-4.

(a) Name the phenomenon represented.

(b) Name any one organism that could be shown at No. 5.

(c) Name the biological process which was the starting point of the whole chain.

(d) Name one natural element which all the organisms 2-4 and even 5 are getting from No. 1 for their survival.

Discussion

11174.	Select the correct statements from the following.
Answer» Select the correct statements from the following.

Discussion

11175.	(a) Compound X consists of molecules. Choose the letter corresponding to the correct answer from the options A, B, C and D given below : (i) The type of bonding in X will be : A. ionic B. electrovalent C. covalent D. molecular (ii) X is likely to have a : A. low melting point and high boiling point, B. high melting point and low boiling point, C. low melting point and low boiling point, D. high melting point and high boiling point. (iii) In the liquid state, X will : A. become ionic, B. be an electrolyte C. conduct electricity, D. not conduct electricity. (b) Electrons are getting added to an element Y : (i) is Y getting oxidized or reduced ? (ii) what charge will Y migrate to during the process of electrolysis ?
Answer» (a) Compound X consists of molecules. Choose the letter corresponding to the correct answer from the options A, B, C and D given below : (i) The type of bonding in X will be : A. ionic B. electrovalent C. covalent D. molecular (ii) X is likely to have a : A. low melting point and high boiling point, B. high melting point and low boiling point, C. low melting point and low boiling point, D. high melting point and high boiling point. (iii) In the liquid state, X will : A. become ionic, B. be an electrolyte C. conduct electricity, D. not conduct electricity. (b) Electrons are getting added to an element Y : (i) is Y getting oxidized or reduced ? (ii) what charge will Y migrate to during the process of electrolysis ?

11175.

(a) Compound X consists of molecules. Choose the letter corresponding to the correct answer from the options A, B, C and D given below : (i) The type of bonding in X will be : A. ionic B. electrovalent C. covalent D. molecular (ii) X is likely to have a : A. low melting point and high boiling point, B. high melting point and low boiling point, C. low melting point and low boiling point, D. high melting point and high boiling point. (iii) In the liquid state, X will : A. become ionic, B. be an electrolyte C. conduct electricity, D. not conduct electricity. (b) Electrons are getting added to an element Y : (i) is Y getting oxidized or reduced ? (ii) what charge will Y migrate to during the process of electrolysis ?

Answer»

(a) Compound X consists of molecules.

Choose the letter corresponding to the correct answer from the options A, B, C and D given below :

(i) The type of bonding in X will be :

A. ionic B. electrovalent

C. covalent D. molecular

(ii) X is likely to have a :

A. low melting point and high boiling point,

B. high melting point and low boiling point,

C. low melting point and low boiling point,

D. high melting point and high boiling point.

(iii) In the liquid state, X will :

A. become ionic,

B. be an electrolyte

C. conduct electricity,

D. not conduct electricity.

(b) Electrons are getting added to an element Y :

(i) is Y getting oxidized or reduced ?

(ii) what charge will Y migrate to during the process of electrolysis ?

Discussion

11176.	Solder is an alloy of:
Answer» Solder is an alloy of:

Discussion

11177.	What is homologous series? Explain with examples. What are the characteristics of homologous series? [5 MARKS]
Answer» What is homologous series? Explain with examples. What are the characteristics of homologous series? [5 MARKS]

Discussion

11178.	Out of HCI and CH3COOH, which one is a weak acid and why? Describe an activity to support your answer.
Answer» Out of HCI and $C H_{3} C O O H$ , which one is a weak acid and why? Describe an activity to support your answer.

Discussion

11179.	Which of the following gas is released when copper reacts with dil. nitric acid?
Answer» Which of the following gas is released when copper reacts with dil. nitric acid?

Discussion

11180.	Write a balanced chemical equation for the process of photosynthesis giving the physical states of all the substances involved and the conditions of the reaction.
Answer» Write a balanced chemical equation for the process of photosynthesis giving the physical states of all the substances involved and the conditions of the reaction.

Discussion

11181.	H+ ions released by acids combine with water to form ______ ions.
Answer» $H^{+}$ ions released by acids combine with water to form ______ ions.

Discussion

11182.	The diagram given below is to prepare Iron (III) chloride in the laboratory: Write the equation for the reaction between iron and chlorine.
Answer» The diagram given below is to prepare Iron (III) chloride in the laboratory: Write the equation for the reaction between iron and chlorine.

11182.

The diagram given below is to prepare Iron (III) chloride in the laboratory: Write the equation for the reaction between iron and chlorine.

Answer»

The diagram given below is to prepare Iron (III) chloride in the laboratory:

Write the equation for the reaction between iron and chlorine.

Discussion

11183.	An element M burns in oxygen to form an ionic compound MO. Which of the following formulae of the compound is correct if this element is made to combine with chlorine?
Answer» An element M burns in oxygen to form an ionic compound MO. Which of the following formulae of the compound is correct if this element is made to combine with chlorine?

Discussion

11184.	Which of the following alloy is used for welding?
Answer» Which of the following alloy is used for welding?

Discussion

11185.	You are given samples of three metals-sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivity.
Answer» You are given samples of three metals-sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivity.

Discussion

11186.	The solubility of a gas in a liquid increases with a/an
Answer» The solubility of a gas in a liquid increases with a/an

Discussion

11187.	Which of the following gas is used to flush the bags of chips ?
Answer» Which of the following gas is used to flush the bags of chips ?

Discussion

11188.	Salts that are least likely to be found in minerals are:
Answer» Salts that are least likely to be found in minerals are:

Discussion

11189.	Detergents are salts of long chain _________.
Answer» Detergents are salts of long chain _________.

Discussion

11190.	Name the gas evolved when dilute hydrochloric acid is added to: [2 MARKS] a) Calcium carbonate b) Sodium sulphite
Answer» Name the gas evolved when dilute hydrochloric acid is added to: [2 MARKS] a) Calcium carbonate b) Sodium sulphite

Discussion

11191.	Humans have an all purpose (capable of digesting both plant and animal food) digestive system because humans are generally
Answer» Humans have an all purpose (capable of digesting both plant and animal food) digestive system because humans are generally

Discussion

11192.	Which of the following statement is correct?
Answer» Which of the following statement is correct?

Discussion

11193.	The alkyl group(s) present in the given compound is/are
Answer» The alkyl group(s) present in the given compound is/are

11193.

The alkyl group(s) present in the given compound is/are

Answer»

The alkyl group(s) present in the given compound is/are

Discussion

11194.	Which class of medicines does paracetamol belong to?
Answer» Which class of medicines does paracetamol belong to?

Discussion

11195.	A student uses lime water to test the gas evolved as a result of action of dilute HCl on solid sodium carbonate. The chemical compound present in lime water is :
Answer» A student uses lime water to test the gas evolved as a result of action of dilute HCl on solid sodium carbonate. The chemical compound present in lime water is :

Discussion

11196.	Match the following general formula with corresponding name: List−IList−II(Family)(General formula)(P)Alkyne1.CnH2n+1X(Q)Alcohol2.CnH2n−2(R)Alkyl halide3.CnH2n(S)Alkene4.CnH2n+2O
Answer» Match the following general formula with corresponding name: $\begin{matrix} L i s t - I & L i s t - I I (F a m i l y) & (G e n e r a l f o r m u l a) (P) & A l k y n e & 1. & C_{n} H_{2 n + 1} X (Q) & A l c o h o l & 2. & C_{n} H_{2 n - 2} (R) & A l k y l h a l i d e & 3. & C_{n} H_{2 n} (S) & A l k e n e & 4. & C_{n} H_{2 n + 2} O \end{matrix}$

Discussion

11197.	Acid rain is formed, when pH of rainwater is____.
Answer» Acid rain is formed, when pH of rainwater is____.

Discussion

11198.	How many grams of glucose dissolved in 1 litre of water will give its 1 M solution?
Answer» How many grams of glucose dissolved in 1 litre of water will give its 1 M solution?

Discussion

11199.	Which among the following metals will get corroded at the fastest rate on exposure to air and water is?
Answer» Which among the following metals will get corroded at the fastest rate on exposure to air and water is?

Discussion

11200.	Which of the following conversion takes place in a galvanic cell?
Answer» Which of the following conversion takes place in a galvanic cell?

Discussion

Explore topic-wise InterviewSolutions in .

The molecular mass of sodium hydroxide is 40. If 1 litre of sodium hydroxide solution is prepared by dissolving 12 g of it then the molarity of the solution will be:

State two uses each of the following compounds : (a) Sodium hydroxide (b) Chlorine (c) Hydrogen (d) Hydrochloric acid

Cost of sugar (C12H22O11) is 40 kg : calculate its cost per mole.

(a) Ca(H2PO4)2 is an example of a compound called __________________ (acid salt / basic salt / normal salt). (b) Write the balanced equation for the reaction of : A named acid and a named alkali.

Write the name and formula of one salt each which contains : (a) two molecules of water of crystallisation (b) five molecules of water of crystallisation (c) ten molecules of water of crystallisation

What is the difference between hydronium and hydroxyl?

Why is higher ratio of calcium hydroxide is taken (with ammonium chloride) in labrotary preparation of ammonia

Which atom will show maximum electronegativity?

Which of the following compounds has the highest melting point?

What is the correct formula of sulphuric acid?

What is aluminothermy and why it has to be done?

The product(s) formed in the following reaction is/are Zn+2KOH (hot conc.)→ ______

What is the five steps mechanism of dehydration reaction

Question 40 Carbon, group (14) element in the Periodic Table, is known to form compounds with many elements. Write an example of a compound formed with (a) Chlorine (group 17 of Periodic Table) (b) Oxygen (group 16 of Periodic Table)

Distinguish between mineral acid and organic acid

1 mol of CH4 contains

Differentiate between a soap and a detergent on the basis of their chemical constituents. For cleansing action why is a detergent preferred to a soap ?

Why is it so that only small wavelengths of light are scattered? how can I visualize the lights wavelength?

Initially it was believed that atomic mass of beryllium was 13. but mendeleev suggested that its atomic mass should be 9. 1. was mendeleev suggestion correct? 2.how had he reached to this conclusion?

What is the colour of universal indicator

Differentiate between saturated and unsaturated hydrocarbons.

Is Na2CO3.10H2O actually wet?

Select the correct statements from the following.

Solder is an alloy of:

What is homologous series? Explain with examples. What are the characteristics of homologous series? [5 MARKS]

Out of HCI and CH3COOH, which one is a weak acid and why? Describe an activity to support your answer.

Which of the following gas is released when copper reacts with dil. nitric acid?

Write a balanced chemical equation for the process of photosynthesis giving the physical states of all the substances involved and the conditions of the reaction.

H+ ions released by acids combine with water to form ______ ions.

The diagram given below is to prepare Iron (III) chloride in the laboratory: Write the equation for the reaction between iron and chlorine.

An element M burns in oxygen to form an ionic compound MO. Which of the following formulae of the compound is correct if this element is made to combine with chlorine?

Which of the following alloy is used for welding?

You are given samples of three metals-sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivity.

The solubility of a gas in a liquid increases with a/an

Which of the following gas is used to flush the bags of chips ?

Salts that are least likely to be found in minerals are:

Detergents are salts of long chain _________.

Name the gas evolved when dilute hydrochloric acid is added to: [2 MARKS] a) Calcium carbonate b) Sodium sulphite

Humans have an all purpose (capable of digesting both plant and animal food) digestive system because humans are generally

Which of the following statement is correct?

The alkyl group(s) present in the given compound is/are

Which class of medicines does paracetamol belong to?

A student uses lime water to test the gas evolved as a result of action of dilute HCl on solid sodium carbonate. The chemical compound present in lime water is :

Match the following general formula with corresponding name: List−IList−II(Family)(General formula)(P)Alkyne1.CnH2n+1X(Q)Alcohol2.CnH2n−2(R)Alkyl halide3.CnH2n(S)Alkene4.CnH2n+2O

Acid rain is formed, when pH of rainwater is____.

How many grams of glucose dissolved in 1 litre of water will give its 1 M solution?

Which among the following metals will get corroded at the fastest rate on exposure to air and water is?

Which of the following conversion takes place in a galvanic cell?