10223 + Interview Questions in Chemistry Page 126 InterviewSolution

6251.	Question 5(a) Write word equations and then balanced equations for the reaction taking place when: (a) Dilute sulphuric acid reacts with zinc granules
Answer» Question 5(a) Write word equations and then balanced equations for the reaction taking place when: (a) Dilute sulphuric acid reacts with zinc granules

Discussion

6252.	Most of the water on the Earth's surface is found in
Answer» Most of the water on the Earth's surface is found in

Discussion

6253.	Deepti took a glass of water and started to add sugar to it. After some time she observes, she cannot dissolve more sugar into it. What is this solution called?
Answer» Deepti took a glass of water and started to add sugar to it. After some time she observes, she cannot dissolve more sugar into it. What is this solution called?

Discussion

6254.	State the purpose of liquefying the ammonia produced in the Haber’s process.
Answer» State the purpose of liquefying the ammonia produced in the Haber’s process.

Discussion

6255.	While determining the melting point of ice, Karan used a glass stirrer. What was the purpouse to use 'glass' stirrer?
Answer» While determining the melting point of ice, Karan used a glass stirrer. What was the purpouse to use 'glass' stirrer?

Discussion

6256.	Which among the following has the weakest bond?
Answer» Which among the following has the weakest bond?

Discussion

6257.	What is the correct definition of suspension of matter
Answer» What is the correct definition of suspension of matter

Discussion

6258.	What is meant by the term chromatography?
Answer» What is meant by the term chromatography?

Discussion

6259.	What is the difference between molecule and compound?
Answer» What is the difference between molecule and compound?

Discussion

6260.	_______ is a colourless gas which is produced by the reaction of active metal with dilute hydrochloric acid.
Answer» _______ is a colourless gas which is produced by the reaction of active metal with dilute hydrochloric acid.

Discussion

6261.	Is atomic mass and mass number same?
Answer» Is atomic mass and mass number same?

Discussion

6262.	It is desired to prepare 500g of 10% mass by mass percentage of urea in water. How much urea should be dissolved in how much volume of water? Density of water is 1 g (mL) raised to the power -1.
Answer» It is desired to prepare 500g of 10% mass by mass percentage of urea in water. How much urea should be dissolved in how much volume of water? Density of water is 1 g (mL) raised to the power -1.

Discussion

6263.	The number of atoms present in one molecule of an element is called as:
Answer» The number of atoms present in one molecule of an element is called as:

Discussion

6264.	Which of the following has maximum number of atoms? a)0.5 g atoms of Cu b)0.635g of Cu c)0.25 moles of Cu atoms d)1g of Cu
Answer» Which of the following has maximum number of atoms? a)0.5 g atoms of Cu b)0.635g of Cu c)0.25 moles of Cu atoms d)1g of Cu

Discussion

6265.	What is the relationship between an atom containing 11 protons, 11 electrons and 11 neutrons, and another atom containing 11 protons, 11 electrons and 12 neutrons?
Answer» What is the relationship between an atom containing 11 protons, 11 electrons and 11 neutrons, and another atom containing 11 protons, 11 electrons and 12 neutrons?

Discussion

6266.	The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. the constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. the constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation. (a) What do you think could (i) constituent A, and (ii) liquid D be ? (b) What could (i) constituent B, and (ii) liquid E be ? (c) What could liquid C be ? (d) How will you separate the mixture containing A, B and C ?
Answer» The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. the constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. the constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation. (a) What do you think could (i) constituent A, and (ii) liquid D be ? (b) What could (i) constituent B, and (ii) liquid E be ? (c) What could liquid C be ? (d) How will you separate the mixture containing A, B and C ?

6266.

The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. the constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. the constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation. (a) What do you think could (i) constituent A, and (ii) liquid D be ? (b) What could (i) constituent B, and (ii) liquid E be ? (c) What could liquid C be ? (d) How will you separate the mixture containing A, B and C ?

Answer»

The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. the constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. the constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.

(a) What do you think could (i) constituent A, and (ii) liquid D be ?

(b) What could (i) constituent B, and (ii) liquid E be ?

(c) What could liquid C be ?

(d) How will you separate the mixture containing A, B and C ?

Discussion

6267.	Consider the following reaction. CaCO3 + H2O + CO2 → Ca(HCO3)2 Element Number of atoms present Reactant sideProduct sideCalcium11Carbon2YOxygenX6Hydrogen22 Recognise X and Y. The value of X + Y is___.
Answer» Consider the following reaction. $C a C O_{3}$ + $H_{2} O$ + $C O_{2}$ $\to$ $C a (H C O_{3})_{2}$ $\begin{matrix} Element & Number of atoms present \end{matrix}$ $\begin{matrix} Reactant side & Product side Calcium & 1 & 1 Carbon & 2 & Y Oxygen & X & 6 Hydrogen & 2 & 2 \end{matrix}$ Recognise $X$ and $Y$ . The value of $X + Y$ is___.

Discussion

6268.	CH4 is a /an ___ compound.
Answer» $C H_{4}$ is a /an ___ compound.

Discussion

6269.	Which of the following does not give oxygen on heating? (IIT-JEE, 2013)
Answer» Which of the following does not give oxygen on heating? (IIT-JEE, 2013)

Discussion

6270.	State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
Answer» State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.

Discussion

6271.	Why fused Calcium chloride and concentrated sulphuric acid is used in a desiccator?
Answer» Why fused Calcium chloride and concentrated sulphuric acid is used in a desiccator?

Discussion

6272.	why cant u use calcium with dil sulphuric acid to prepare hydrogen in labrotory method
Answer» why cant u use calcium with dil sulphuric acid to prepare hydrogen in labrotory method

Discussion

6273.	Properties of pure substance?
Answer» Properties of pure substance?

Discussion

6274.	A dish is given to you,which contains a blackish -yellow powder.When you move magnet over it, you areamazed to see black particlesfly upwards and get stuck to the magnet, and all that's left in the dish is a yellow powder, which you dissover to be sulphur. Was your original powder an __________
Answer» A dish is given to you,which contains a blackish -yellow powder.When you move magnet over it, you areamazed to see black particlesfly upwards and get stuck to the magnet, and all that's left in the dish is a yellow powder, which you dissover to be sulphur. Was your original powder an __________

Discussion

6275.	How do plants without chlorophyll prepare their food?
Answer» How do plants without chlorophyll prepare their food?

Discussion

6276.	Why does light travels with such a great speed?
Answer» Why does light travels with such a great speed?

Discussion

6277.	How to calculate Average atomic mass?? Please experts be fast... 😲
Answer» How to calculate Average atomic mass?? Please experts be fast... 😲

Discussion

6278.	Human body comprises of ____ percentage of water 70
Answer» Human body comprises of ____ percentage of water 70

Discussion

6279.	Can you show an activity of Brownian motion with potassium
Answer» Can you show an activity of Brownian motion with potassium

Discussion

6280.	(i) Electropositive nature of the element(s) increases down the group and decreases across the period (ii) Electronegativity of the element decreases down the group and increases across the period (iii) Atomic size increases down the group and decreases across a period (left to right) (iv) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the most electropositive element among them
Answer» (i) Electropositive nature of the element(s) increases down the group and decreases across the period (ii) Electronegativity of the element decreases down the group and increases across the period (iii) Atomic size increases down the group and decreases across a period (left to right) (iv) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the most electropositive element among them

Discussion

6281.	___ consists of two protons and two neutrons.
Answer» ___ consists of two protons and two neutrons.

Discussion

6282.	A silicon chip used in an integrated circuit of a microcomputer has a mass of 5.68mg . How many silicon (Si) atoms are present in this chip
Answer» A silicon chip used in an integrated circuit of a microcomputer has a mass of 5.68mg . How many silicon (Si) atoms are present in this chip

Discussion

6283.	The valency of Nitrogen in the following is? NO, NO2,N2O3
Answer» The valency of Nitrogen in the following is? NO, NO2,N2O3

6283.

The valency of Nitrogen in the following is? NO, NO2,N2O3

Answer»

The valency of Nitrogen in the following is?

NO, NO2,N2O3

Discussion

6284.	What is the atomicity of phospheric acid. Name the cation and anion used in the acid.
Answer» What is the atomicity of phospheric acid. Name the cation and anion used in the acid.

Discussion

6285.	Atomic Number of O = 8, Electrons in K shell = 2, Electrons in L shell = 6. Configuration = 2, 6
Answer» Atomic Number of O = 8, Electrons in K shell = 2, Electrons in L shell = 6. Configuration = 2, 6

Discussion

6286.	Observe the following statements I. HCN, C2H2 and O2 have multiple bonds II. N2H4, C2H6 and NH3 does not have multiple bonds III. NH+14, H3O+ and Ni(CO)4 have co - ordinate covalent bonds IV. K4[Fe(CN)6] and [Ag(NH3)2]Cl have ionic, covalent and dative bonds The correct statements are
Answer» Observe the following statements I. $H C N, C_{2} H_{2} a n d O_{2}$ have multiple bonds II. $N_{2} H_{4}, C_{2} H_{6} a n d N H_{3}$ does not have multiple bonds III. $N H_{4}^{+ 1}, H_{3} O^{+} a n d N i (C O)_{4}$ have co - ordinate covalent bonds IV. $K 4 [F e (C N)_{6}] a n d [A g (N H_{3})_{2}] C l$ have ionic, covalent and dative bonds The correct statements are

Discussion

6287.	How do you separate water and glycerin ?
Answer» How do you separate water and glycerin ?

Discussion

6288.	Which of the following configurations represents an atom of the group having the highest second ionization energy?
Answer» Which of the following configurations represents an atom of the group having the highest second ionization energy?

Discussion

6289.	What is the difference between homogeneous and heterogeneous mixtures ......? answer it in points.
Answer» What is the difference between homogeneous and heterogeneous mixtures ......? answer it in points.

Discussion

6290.	Atmospheric ozone layer which protects us from UV-B & C is getting depleted by the addition of-
Answer» Atmospheric ozone layer which protects us from UV-B & C is getting depleted by the addition of-

Discussion

6291.	What is the difference in composition of CNG and gas cylinders used in homes?
Answer» What is the difference in composition of CNG and gas cylinders used in homes?

Discussion

6292.	What is the difference between matter and substance?
Answer» What is the difference between matter and substance?

Discussion

6293.	Question 13 Chlorine exists in two isotopic forms. Cl - 37 and Cl - 35 but its atomic mass is 35.5. This indicates the ratio of Cl - 37 and Cl - 35 is approximately (a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) 3 : 1
Answer» Question 13 Chlorine exists in two isotopic forms. Cl - 37 and Cl - 35 but its atomic mass is 35.5. This indicates the ratio of Cl - 37 and Cl - 35 is approximately (a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) 3 : 1

6293.

Question 13 Chlorine exists in two isotopic forms. Cl - 37 and Cl - 35 but its atomic mass is 35.5. This indicates the ratio of Cl - 37 and Cl - 35 is approximately (a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) 3 : 1

Answer»

Question 13

Chlorine exists in two isotopic forms. Cl - 37 and Cl - 35 but its atomic mass is 35.5. This indicates the ratio of Cl - 37 and Cl - 35 is approximately

(a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) 3 : 1

Discussion

6294.	Which among the following substances is formed when potassium hydroxide (KOH) reacts with hydrochloric acid (HCl)?
Answer» Which among the following substances is formed when potassium hydroxide (KOH) reacts with hydrochloric acid (HCl)?

Discussion

6295.	Which of the following statements is correct about a chemical change?
Answer» Which of the following statements is correct about a chemical change?

Discussion

6296.	Name the shell of an atom which can accomodate a maximum of: (a) 2 electrons (b) 18 electrons
Answer» Name the shell of an atom which can accomodate a maximum of: (a) 2 electrons (b) 18 electrons

Discussion

6297.	As we increase the temperature, the rate of diffusion _________.
Answer» As we increase the temperature, the rate of diffusion _________.

Discussion

6298.	3MnO2(s)+4Al(s)→3Mn(s)+2Al2O3(s) In the above reaction, the oxidising agent is:
Answer» $3 {MnO}_{2} (s) + 4 Al (s) \to 3 Mn (s) + 2 {Al}_{2} O_{3} (s)$ In the above reaction, the oxidising agent is:

Discussion

6299.	Which technique is used in a washing machine to squeeze out water from wet clothes while drying?
Answer» Which technique is used in a washing machine to squeeze out water from wet clothes while drying?

Discussion

6300.	Some TVs are named as plasma TVs, why?
Answer» Some TVs are named as plasma TVs, why?

Discussion

Explore topic-wise InterviewSolutions in .

Question 5(a) Write word equations and then balanced equations for the reaction taking place when: (a) Dilute sulphuric acid reacts with zinc granules

Most of the water on the Earth's surface is found in

Deepti took a glass of water and started to add sugar to it. After some time she observes, she cannot dissolve more sugar into it. What is this solution called?

State the purpose of liquefying the ammonia produced in the Haber’s process.

While determining the melting point of ice, Karan used a glass stirrer. What was the purpouse to use 'glass' stirrer?

Which among the following has the weakest bond?

What is the correct definition of suspension of matter

What is meant by the term chromatography?

What is the difference between molecule and compound?

_______ is a colourless gas which is produced by the reaction of active metal with dilute hydrochloric acid.

Is atomic mass and mass number same?

It is desired to prepare 500g of 10% mass by mass percentage of urea in water. How much urea should be dissolved in how much volume of water? Density of water is 1 g (mL) raised to the power -1.

The number of atoms present in one molecule of an element is called as:

Which of the following has maximum number of atoms? a)0.5 g atoms of Cu b)0.635g of Cu c)0.25 moles of Cu atoms d)1g of Cu

What is the relationship between an atom containing 11 protons, 11 electrons and 11 neutrons, and another atom containing 11 protons, 11 electrons and 12 neutrons?

Consider the following reaction. CaCO3 + H2O + CO2 → Ca(HCO3)2 Element Number of atoms present Reactant sideProduct sideCalcium11Carbon2YOxygenX6Hydrogen22 Recognise X and Y. The value of X + Y is___.

CH4 is a /an ___ compound.

Which of the following does not give oxygen on heating? (IIT-JEE, 2013)

State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.

Why fused Calcium chloride and concentrated sulphuric acid is used in a desiccator?

why cant u use calcium with dil sulphuric acid to prepare hydrogen in labrotory method

Properties of pure substance?

A dish is given to you,which contains a blackish -yellow powder.When you move magnet over it, you areamazed to see black particlesfly upwards and get stuck to the magnet, and all that's left in the dish is a yellow powder, which you dissover to be sulphur. Was your original powder an __________

How do plants without chlorophyll prepare their food?

Why does light travels with such a great speed?

How to calculate Average atomic mass?? Please experts be fast... 😲

Human body comprises of ____ percentage of water 70

Can you show an activity of Brownian motion with potassium

___ consists of two protons and two neutrons.

A silicon chip used in an integrated circuit of a microcomputer has a mass of 5.68mg . How many silicon (Si) atoms are present in this chip

The valency of Nitrogen in the following is? NO, NO2,N2O3

What is the atomicity of phospheric acid. Name the cation and anion used in the acid.

Atomic Number of O = 8, Electrons in K shell = 2, Electrons in L shell = 6. Configuration = 2, 6

Observe the following statements I. HCN, C2H2 and O2 have multiple bonds II. N2H4, C2H6 and NH3 does not have multiple bonds III. NH+14, H3O+ and Ni(CO)4 have co - ordinate covalent bonds IV. K4[Fe(CN)6] and [Ag(NH3)2]Cl have ionic, covalent and dative bonds The correct statements are

How do you separate water and glycerin ?

Which of the following configurations represents an atom of the group having the highest second ionization energy?

What is the difference between homogeneous and heterogeneous mixtures ......? answer it in points.

Atmospheric ozone layer which protects us from UV-B &amp; C is getting depleted by the addition of-

What is the difference in composition of CNG and gas cylinders used in homes?

What is the difference between matter and substance?

Question 13 Chlorine exists in two isotopic forms. Cl - 37 and Cl - 35 but its atomic mass is 35.5. This indicates the ratio of Cl - 37 and Cl - 35 is approximately (a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) 3 : 1

Which among the following substances is formed when potassium hydroxide (KOH) reacts with hydrochloric acid (HCl)?

Which of the following statements is correct about a chemical change?

Name the shell of an atom which can accomodate a maximum of: (a) 2 electrons (b) 18 electrons

As we increase the temperature, the rate of diffusion _________.

3MnO2(s)+4Al(s)→3Mn(s)+2Al2O3(s) In the above reaction, the oxidising agent is:

Which technique is used in a washing machine to squeeze out water from wet clothes while drying?

Some TVs are named as plasma TVs, why?

Atmospheric ozone layer which protects us from UV-B & C is getting depleted by the addition of-