10223 + Interview Questions in Chemistry Page 129 InterviewSolution

6401.	Anti-Pollution measures are really the need of the day to save the Planet Earth. Identify the initiatives that should be Practiced?
Answer» Anti-Pollution measures are really the need of the day to save the Planet Earth. Identify the initiatives that should be Practiced?

Discussion

6402.	I wanted to know what is the exact definition of a seed crystal
Answer» I wanted to know what is the exact definition of a seed crystal

Discussion

6403.	Calculate the number of oxygen atoms in 0.10 mole of Na2CO3.10H20
Answer» Calculate the number of oxygen atoms in 0.10 mole of ${N a}_{2} C O_{3} .10 H_{2} 0$

Discussion

6404.	In the modern periodic table, elements are arranged in the order of their
Answer» In the modern periodic table, elements are arranged in the order of their

Discussion

6405.	In the given experiment, on heating lead nitrate powder in a boiling test tube, we observe brown fumes. The emission of brown coloured fumes is due to formation of:
Answer» In the given experiment, on heating lead nitrate powder in a boiling test tube, we observe brown fumes. The emission of brown coloured fumes is due to formation of:

6405.

In the given experiment, on heating lead nitrate powder in a boiling test tube, we observe brown fumes. The emission of brown coloured fumes is due to formation of:

Answer»

In the given experiment, on heating lead nitrate powder in a boiling test tube, we observe brown fumes. The emission of brown coloured fumes is due to formation of:

Discussion

6406.	Which of the following is not a part of the observations made by Rutherford in his experiment?
Answer» Which of the following is not a part of the observations made by Rutherford in his experiment?

Discussion

6407.	What do we call the molecule in which all the atoms are of same kind?
Answer» What do we call the molecule in which all the atoms are of same kind?

Discussion

6408.	Which of the following is/are correct graphical representation(s) of Charle's Law?
Answer» Which of the following is/are correct graphical representation(s) of Charle's Law?

Discussion

6409.	Taking mixture of iron filling & sulphur as example, State 4 characteristics of a mixture
Answer» Taking mixture of iron filling & sulphur as example, State 4 characteristics of a mixture

Discussion

6410.	Which metal is preferred for collecting hydrogen from : (a) cold water ? (b) hot water ? (c) steam ? Write balanced equation for each case.
Answer» Which metal is preferred for collecting hydrogen from : (a) cold water ? (b) hot water ? (c) steam ? Write balanced equation for each case.

6410.

Which metal is preferred for collecting hydrogen from : (a) cold water ? (b) hot water ? (c) steam ? Write balanced equation for each case.

Answer»

Which metal is preferred for collecting hydrogen from :

(a) cold water ?

(b) hot water ?

(c) steam ?

Write balanced equation for each case.

Discussion

6411.	What is the chemical formula ? What is the rule for writing a formula correctly ?
Answer» What is the chemical formula ? What is the rule for writing a formula correctly ?

Discussion

6412.	Choose terms from the options given in brackets to complete these sentences. (a) When CuO reacts with hydrogen, .............. is reduced and ............... is oxidized to .............. . (CuO,H2,Cu,H2O) (b) Hydrogen is ................ soluble in water. (Sparingly, highly, moderately) (c) Metals like ................., ................. and ................ give H2 with steam. (iron, magnesium, aluminium, sodium, calcium) (d) Sodium .......... reacts smootly with cold water. (metal, amalgam, in the molten state) (e) A metal ............. hydrogen in the activity series gives hydrogen with ............... acid or acid. (above, below, dilute hydrochloric, concentrated hydrochloric, dilute sulphuric).
Answer» Choose terms from the options given in brackets to complete these sentences. (a) When CuO reacts with hydrogen, .............. is reduced and ............... is oxidized to .............. . $(C u O, H_{2}, C u, H_{2} O)$ (b) Hydrogen is ................ soluble in water. (Sparingly, highly, moderately) (c) Metals like ................., ................. and ................ give $H_{2}$ with steam. (iron, magnesium, aluminium, sodium, calcium) (d) Sodium .......... reacts smootly with cold water. (metal, amalgam, in the molten state) (e) A metal ............. hydrogen in the activity series gives hydrogen with ............... acid or acid. (above, below, dilute hydrochloric, concentrated hydrochloric, dilute sulphuric).

6412.

Choose terms from the options given in brackets to complete these sentences. (a) When CuO reacts with hydrogen, .............. is reduced and ............... is oxidized to .............. . (CuO,H2,Cu,H2O) (b) Hydrogen is ................ soluble in water. (Sparingly, highly, moderately) (c) Metals like ................., ................. and ................ give H2 with steam. (iron, magnesium, aluminium, sodium, calcium) (d) Sodium .......... reacts smootly with cold water. (metal, amalgam, in the molten state) (e) A metal ............. hydrogen in the activity series gives hydrogen with ............... acid or acid. (above, below, dilute hydrochloric, concentrated hydrochloric, dilute sulphuric).

Answer»

Choose terms from the options given in brackets to complete these sentences.

(a) When CuO reacts with hydrogen, .............. is reduced and ............... is oxidized to .............. . $(C u O, H_{2}, C u, H_{2} O)$

(b) Hydrogen is ................ soluble in water. (Sparingly, highly, moderately)

(c) Metals like ................., ................. and ................ give $H_{2}$ with steam.

(iron, magnesium, aluminium, sodium, calcium)

(d) Sodium .......... reacts smootly with cold water. (metal, amalgam, in the molten state)

(e) A metal ............. hydrogen in the activity series gives hydrogen with ............... acid or acid.

(above, below, dilute hydrochloric, concentrated hydrochloric, dilute sulphuric).

Discussion

6413.	A basic solution turns ___ litmus ___.
Answer» A basic solution turns ___ litmus ___.

Discussion

6414.	What is the difference between ions and radicals?
Answer» What is the difference between ions and radicals?

Discussion

6415.	What is a physical change ? Give an example
Answer» What is a physical change ? Give an example

Discussion

6416.	A simple example of a coordinate covalent bond is exhibited by
Answer» A simple example of a coordinate covalent bond is exhibited by

Discussion

6417.	Why is air homogeneous mixture and not a colloid?
Answer» Why is air homogeneous mixture and not a colloid?

Discussion

6418.	At room temperature the forces of attraction between the particles of solid substances are ___ (stronger/weaker) than those which exist in the gaseous state.
Answer» At room temperature the forces of attraction between the particles of solid substances are ___ (stronger/weaker) than those which exist in the gaseous state.

Discussion

6419.	Absolute zero (0 K) is that temperature at which:
Answer» Absolute zero (0 K) is that temperature at which:

6419.

Absolute zero (0 K) is that temperature at which:

Answer»

Absolute zero (0 K) is that temperature at which:

Discussion

6420.	In the given structure, Which one is/are primary carbon atom/s?
Answer» In the given structure, Which one is/are primary carbon atom/s?

6420.

In the given structure, Which one is/are primary carbon atom/s?

Answer»

In the given structure,

Which one is/are primary carbon atom/s?

Discussion

6421.	What is the nature of the bond in hydrogen sulphide?
Answer» What is the nature of the bond in hydrogen sulphide?

Discussion

6422.	Elements in the 16th group of the Modern Periodic Table are also called ___.
Answer» Elements in the $16^{t h}$ group of the Modern Periodic Table are also called ___.

Discussion

6423.	What are the harmful effects of oxides of sulphur ?
Answer» What are the harmful effects of oxides of sulphur ?

Discussion

6424.	Which of the following are true in case of isobars?
Answer» Which of the following are true in case of isobars?

Discussion

6425.	The ___________ is owning up almost 99.99% of the mass of the atom, but by default it covers only 10−5 of the volume of the atom.
Answer» The ___________ is owning up almost 99.99% of the mass of the atom, but by default it covers only $10^{- 5}$ of the volume of the atom.

Discussion

6426.	QUESTION 2.7 A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of the resulting solution.
Answer» QUESTION 2.7 A solution is obtained by mixing 300 g of $25 %$ solution and 400 g of $40 %$ solution by mass. Calculate the mass percentage of the resulting solution.

6426.

QUESTION 2.7 A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of the resulting solution.

Answer»

QUESTION 2.7

A solution is obtained by mixing 300 g of $25 %$ solution and 400 g of $40 %$ solution by mass. Calculate the mass percentage of the resulting solution.

Discussion

6427.	CaSO4.2H2O Δ120∘C−−−−−−→ A–– + 3H2O.A is
Answer» $C a S O_{4} .2 H_{2} O Δ 120^{\circ} C - ----- \to A - - + 3 H_{2} O . A$ is

Discussion

6428.	What is lone pair of electrons
Answer» What is lone pair of electrons

Discussion

6429.	Particles of matter are continuously moving is one of the characteristics of matter then why table,chair and other solid material is not continuously moving?
Answer» Particles of matter are continuously moving is one of the characteristics of matter then why table,chair and other solid material is not continuously moving?

Discussion

6430.	Differentiate between brine and butter on the basis of properties and characters
Answer» Differentiate between brine and butter on the basis of properties and characters

6430.

Differentiate between brine and butter on the basis of properties and characters

Answer»

Differentiate between

brine and butter on the basis of properties and characters

Discussion

6431.	Na + O2 → Y Y + H2O → Z The commercial name of Z is _________.
Answer» $N a$ + $O_{2}$ $\to$ $Y$ $Y$ + $H_{2} O$ $\to$ $Z$ The commercial name of Z is _________.

6431.

Na + O2 → Y Y + H2O → Z The commercial name of Z is _________.

Answer»

$N a$ + $O_{2}$ $\to$ $Y$

$Y$ + $H_{2} O$ $\to$ $Z$

The commercial name of Z is _________.

Discussion

6432.	The charge of an atom is___.
Answer» The charge of an atom is___.

Discussion

6433.	Which of the following solvent will not dissociate HCl into free ions ?
Answer» Which of the following solvent will not dissociate HCl into free ions ?

Discussion

6434.	The concentration of a solution is the amount of __________ present per unit volume of the solution.
Answer» The concentration of a solution is the amount of __________ present per unit volume of the solution.

Discussion

6435.	Why does not dry HCl gas change the colour of the dry litmus paper?
Answer» Why does not dry $H C l$ gas change the colour of the dry litmus paper?

Discussion

6436.	Question 4 (e) Write the chemical formulae of the following: (e) Calcium carbonate
Answer» Question 4 (e) Write the chemical formulae of the following: (e) Calcium carbonate

Discussion

6437.	Why were anode rays also called as 'canal rays'?
Answer» Why were anode rays also called as 'canal rays'?

Discussion

6438.	What would be the value of X in the given photosynthesis reaction? XCO2 + 6H2O→C6H12O6 + 6O2 6
Answer» What would be the value of X in the given photosynthesis reaction? ${XCO}_{2} + 6 H_{2} O \to C_{6} H_{12} O_{6} + 6 O_{2}$ 6

Discussion

6439.	If R is the Rydberg Constant in cm−1, then hydrogen atom does not emit any radiation of wavelength in the range of
Answer» If R is the Rydberg Constant in $c m^{- 1}$ , then hydrogen atom does not emit any radiation of wavelength in the range of

Discussion

6440.	Explain the three states of matter with respect to their force attraction and intermolecular space
Answer» Explain the three states of matter with respect to their force attraction and intermolecular space

Discussion

6441.	2Pb(NO3)2(s)Heat−−→2PbO(s)+4NO2(g)+O2(g) The reaction given above is example of:
Answer» ${2Pb(NO}_{3})_{2} (s) Heat - - \to 2 PbO(s) + 4 {NO}_{2} (g) + O_{2} (g)$ The reaction given above is example of:

Discussion

6442.	Intermixing of particles of two different types of matter is called _______.
Answer» Intermixing of particles of two different types of matter is called _______.

Discussion

6443.	Question 7(b) What is the mass of: (b) 4 moles of aluminium atoms (atomic mass of aluminium = 27)?
Answer» Question 7(b) What is the mass of: (b) 4 moles of aluminium atoms (atomic mass of aluminium = 27)?

Discussion

6444.	Which of the following are the examples of acidic radicals?
Answer» Which of the following are the examples of acidic radicals?

Discussion

6445.	TiCl4 fumes strongly in moist air and is hydrolyzed by water to give
Answer» $T i C l_{4}$ fumes strongly in moist air and is hydrolyzed by water to give

Discussion

6446.	The properties of _________ are ductility and mallebility. __________ are poor conductors of heat and electricity. __________ has intermediate properties.
Answer» The properties of _________ are ductility and mallebility. __________ are poor conductors of heat and electricity. __________ has intermediate properties.

Discussion

6447.	if uniform and definite composition are the same then whats the difference between the composition of homogeneous mixture and compound?
Answer» if uniform and definite composition are the same then whats the difference between the composition of homogeneous mixture and compound?

Discussion

6448.	Match the physical state of elements or compounds to their symbols as used while writing chemical equations: Physical StateSymbol1.Gas(A) (s)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water(solution with water)(D) (l)
Answer» Match the physical state of elements or compounds to their symbols as used while writing chemical equations: $\begin{matrix} P h y s i c a l S t a t e & S y m b o l 1. G a s & (A) (s) 2. S o l i d & (B) (g) 3. L i q u i d & (C) (a q) 4. D i s s o l v e d i n w a t e r (s o l u t i o n w i t h w a t e r) & (D) (l) \end{matrix}$

6448.

Match the physical state of elements or compounds to their symbols as used while writing chemical equations: Physical StateSymbol1.Gas(A) (s)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water(solution with water)(D) (l)

Answer»

Match the physical state of elements or compounds to their symbols as used while writing chemical equations:

$\begin{matrix} P h y s i c a l S t a t e & S y m b o l 1. G a s & (A) (s) 2. S o l i d & (B) (g) 3. L i q u i d & (C) (a q) 4. D i s s o l v e d i n w a t e r (s o l u t i o n w i t h w a t e r) & (D) (l) \end{matrix}$

Discussion

6449.	Which of the following products is obtained when we heat NaHCO3?
Answer» Which of the following products is obtained when we heat $N a H C O_{3}$ ?

Discussion

6450.	Why cleaning with soap and water a physical change if the reactants can't be got back?
Answer» Why cleaning with soap and water a physical change if the reactants can't be got back?

Discussion

Explore topic-wise InterviewSolutions in .

Anti-Pollution measures are really the need of the day to save the Planet Earth. Identify the initiatives that should be Practiced?

I wanted to know what is the exact definition of a seed crystal

Calculate the number of oxygen atoms in 0.10 mole of Na2CO3.10H20

In the modern periodic table, elements are arranged in the order of their

In the given experiment, on heating lead nitrate powder in a boiling test tube, we observe brown fumes. The emission of brown coloured fumes is due to formation of:

Which of the following is not a part of the observations made by Rutherford in his experiment?

What do we call the molecule in which all the atoms are of same kind?

Which of the following is/are correct graphical representation(s) of Charle's Law?

Taking mixture of iron filling &amp; sulphur as example, State 4 characteristics of a mixture

Which metal is preferred for collecting hydrogen from : (a) cold water ? (b) hot water ? (c) steam ? Write balanced equation for each case.

What is the chemical formula ? What is the rule for writing a formula correctly ?

A basic solution turns ___ litmus ___.

What is the difference between ions and radicals?

What is a physical change ? Give an example

A simple example of a coordinate covalent bond is exhibited by

Why is air homogeneous mixture and not a colloid?

At room temperature the forces of attraction between the particles of solid substances are ___ (stronger/weaker) than those which exist in the gaseous state.

Absolute zero (0 K) is that temperature at which:

In the given structure, Which one is/are primary carbon atom/s?

What is the nature of the bond in hydrogen sulphide?

Elements in the 16th group of the Modern Periodic Table are also called ___.

What are the harmful effects of oxides of sulphur ?

Which of the following are true in case of isobars?

The ___________ is owning up almost 99.99% of the mass of the atom, but by default it covers only 10−5 of the volume of the atom.

QUESTION 2.7 A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of the resulting solution.

CaSO4.2H2O Δ120∘C−−−−−−→ A–– + 3H2O.A is

What is lone pair of electrons

Particles of matter are continuously moving is one of the characteristics of matter then why table,chair and other solid material is not continuously moving?

Differentiate between brine and butter on the basis of properties and characters

Na + O2 → Y Y + H2O → Z The commercial name of Z is _________.

The charge of an atom is___.

Which of the following solvent will not dissociate HCl into free ions ?

The concentration of a solution is the amount of __________ present per unit volume of the solution.

Why does not dry HCl gas change the colour of the dry litmus paper?

Question 4 (e) Write the chemical formulae of the following: (e) Calcium carbonate

Why were anode rays also called as 'canal rays'?

What would be the value of X in the given photosynthesis reaction? XCO2 + 6H2O→C6H12O6 + 6O2 6

If R is the Rydberg Constant in cm−1, then hydrogen atom does not emit any radiation of wavelength in the range of

Explain the three states of matter with respect to their force attraction and intermolecular space

2Pb(NO3)2(s)Heat−−→2PbO(s)+4NO2(g)+O2(g) The reaction given above is example of:

Intermixing of particles of two different types of matter is called _______.

Question 7(b) What is the mass of: (b) 4 moles of aluminium atoms (atomic mass of aluminium = 27)?

Which of the following are the examples of acidic radicals?

TiCl4 fumes strongly in moist air and is hydrolyzed by water to give

The properties of _________ are ductility and mallebility. __________ are poor conductors of heat and electricity. __________ has intermediate properties.

if uniform and definite composition are the same then whats the difference between the composition of homogeneous mixture and compound?

Match the physical state of elements or compounds to their symbols as used while writing chemical equations: Physical StateSymbol1.Gas(A) (s)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water(solution with water)(D) (l)

Which of the following products is obtained when we heat NaHCO3?

Why cleaning with soap and water a physical change if the reactants can't be got back?

Taking mixture of iron filling & sulphur as example, State 4 characteristics of a mixture

A basic solution turns _ litmus _.

The properties of _ are ductility and mallebility. are poor conductors of heat and electricity. ____ has intermediate properties.