10223 + Interview Questions in Chemistry Page 185 InterviewSolution

9201.	Compare an electron and a proton in repsect of mass and charge.
Answer» Compare an electron and a proton in repsect of mass and charge.

Discussion

9202.	Which of the following statement is true for elements?
Answer» Which of the following statement is true for elements?

Discussion

9203.	What is a solution?
Answer» What is a solution?

Discussion

9204.	Electron affinity is the
Answer» Electron affinity is the

Discussion

9205.	Compare the properties of metals and non-metals with respect to (i) malleability (ii) ductility, and (iii) electrical conductivity.
Answer» Compare the properties of metals and non-metals with respect to (i) malleability (ii) ductility, and (iii) electrical conductivity.

Discussion

9206.	Calculate the molar mass of the following substances: [5 MARKS] (a) Ethyne, C2H2 (b) Sulphur molecule, S8 (c) Phosphorus molecule, P4 (atomic mass of phosphorus = 31) (d) Hydrochloric acid, HCl (e) Nitric acid, HNO3
Answer» Calculate the molar mass of the following substances: [5 MARKS] (a) Ethyne, C₂H₂ (b) Sulphur molecule, S₈ (c) Phosphorus molecule, P₄ (atomic mass of phosphorus = 31) (d) Hydrochloric acid, HCl (e) Nitric acid, HNO₃

9206.

Calculate the molar mass of the following substances: [5 MARKS] (a) Ethyne, C2H2 (b) Sulphur molecule, S8 (c) Phosphorus molecule, P4 (atomic mass of phosphorus = 31) (d) Hydrochloric acid, HCl (e) Nitric acid, HNO3

Answer»

Calculate the molar mass of the following substances: [5 MARKS]

(a) Ethyne, C₂H₂

(b) Sulphur molecule, S₈

(c) Phosphorus molecule, P₄ (atomic mass of phosphorus = 31)

(d) Hydrochloric acid, HCl

(e) Nitric acid, HNO₃

Discussion

9207.	On converting 25∘C,38∘C and 66∘C to Kelvin scale, the correct swquence of temperatures will be : (a) 298 K, 311 K and 339 K (b) 298 K,300 K and 338 K (c) 273 k, 278 K, and 543 K (d) 298 K, 310 K and 338 K
Answer» On converting $25^{\circ} C, 38^{\circ} C$ and $66^{\circ}$ C to Kelvin scale, the correct swquence of temperatures will be : (a) 298 K, 311 K and 339 K (b) 298 K,300 K and 338 K (c) 273 k, 278 K, and 543 K (d) 298 K, 310 K and 338 K

Discussion

9208.	_________ is a reliable measure of the degree of hotness or coldness of a body.
Answer» _________ is a reliable measure of the degree of hotness or coldness of a body.

Discussion

9209.	Consider the following reaction. CaCO3 + H2O + CO2 → Ca(HCO3)2 ElementNumber 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___. .

9209.

Consider the following reaction. CaCO3 + H2O + CO2 → Ca(HCO3)2 ElementNumber 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

9210.	What is the precipitate formed when a pale green compound reacts with caustic soda to form dirty green gelatinous precipitate along with sodium sulphate?
Answer» What is the precipitate formed when a pale green compound reacts with caustic soda to form dirty green gelatinous precipitate along with sodium sulphate?

Discussion

9211.	What is the significance of the formula H2O ?
Answer» What is the significance of the formula $H_{2} O$ ?

Discussion

9212.	What is the gaseous product that is released when sodium bicarbonate reacts with sulphuric acid?
Answer» What is the gaseous product that is released when sodium bicarbonate reacts with sulphuric acid?

Discussion

9213.	Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner Triad?
Answer» Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner Triad?

Discussion

9214.	Which of the following will behave as a strong acid when added to water?
Answer» Which of the following will behave as a strong acid when added to water?

Discussion

9215.	Gradiation in physical properties are observed in homologous series with increasing atomic mass.Give reason.
Answer» Gradiation in physical properties are observed in homologous series with increasing atomic mass.Give reason.

Discussion

9216.	Activity to show that particles of matter are small in size
Answer» Activity to show that particles of matter are small in size

Discussion

9217.	Give example of substances of daily life which depict the characteristics of matter
Answer» Give example of substances of daily life which depict the characteristics of matter

Discussion

9218.	How much amount of NH3 is produced when 28 g of nitrogen react with 6 g of hydrogen?34
Answer» How much amount of $N H_{3}$ is produced when 28 g of nitrogen react with 6 g of hydrogen? 34

Discussion

9219.	Which of the following is Photo-Chemical Reaction?
Answer» Which of the following is Photo-Chemical Reaction?

Discussion

9220.	Is there anything which can travel faster than the speed of light.?
Answer» Is there anything which can travel faster than the speed of light.?

Discussion

9221.	if blood is a homogenous mixture then how can it be called as a suspension rather than being as solution as solution are the only ones that are homogenous in nature ????
Answer» if blood is a homogenous mixture then how can it be called as a suspension rather than being as solution as solution are the only ones that are homogenous in nature ????

Discussion

9222.	What happens when crystals of washing soda are left exposed to air?
Answer» What happens when crystals of washing soda are left exposed to air?

Discussion

9223.	I want one word or multiple choice questions for the lesson Hydrogen
Answer» I want one word or multiple choice questions for the lesson Hydrogen

Discussion

9224.	In which of the following, Tyndall effect is not observed.
Answer» In which of the following, Tyndall effect is not observed.

Discussion

9225.	Hydrogen chloride is a ________ made of H+ and Cl- which are ______ and ______ respectively.
Answer» Hydrogen chloride is a ________ made of H⁺ and Cl^- which are ______ and ______ respectively.

Discussion

9226.	It is said that atmospheric pollution does not occur when Hydrogen is used as a fuel. What is the reason ?
Answer» It is said that atmospheric pollution does not occur when Hydrogen is used as a fuel. What is the reason ?

Discussion

9227.	(a) Give two symbols which have been derived from the "English names" of the elements. (b) Give two symbols which have been derived from the "Latin names" of the elements.
Answer» (a) Give two symbols which have been derived from the "English names" of the elements. (b) Give two symbols which have been derived from the "Latin names" of the elements.

9227.

(a) Give two symbols which have been derived from the "English names" of the elements. (b) Give two symbols which have been derived from the "Latin names" of the elements.

Answer»

(a) Give two symbols which have been derived from the "English names" of the elements.

(b) Give two symbols which have been derived from the "Latin names" of the elements.

Discussion

9228.	Is there any difference between flammable and inflammable ?
Answer» Is there any difference between flammable and inflammable ?

Discussion

9229.	When a crystal of copper sulphate is placed at the bottom of a beaker containing water, the water slowly turns blue. Why ?
Answer» When a crystal of copper sulphate is placed at the bottom of a beaker containing water, the water slowly turns blue. Why ?

Discussion

9230.	What are the conclusions of α-scattering experiment?
Answer» What are the conclusions of $α$ -scattering experiment?

Discussion

9231.	What are the maximum number of electrons that can be present in the K, L and M shells?
Answer» What are the maximum number of electrons that can be present in the K, L and M shells?

Discussion

9232.	In a combination reaction, the number of products are:
Answer» In a combination reaction, the number of products are:

Discussion

9233.	For an endothermic reaction, energy of activation is Ea and enthalpy of reaction is ΔH (both of these in kJ/mol). Minimum value of Ea will be:
Answer» For an endothermic reaction, energy of activation is $E_{a}$ and enthalpy of reaction is $Δ H$ (both of these in kJ/mol). Minimum value of $E_{a}$ will be:

Discussion

9234.	Which of the following bases are alkalis?
Answer» Which of the following bases are alkalis?

Discussion

9235.	Which element has the highest ionisation energy and lowest ionisation energy?
Answer» Which element has the highest ionisation energy and lowest ionisation energy?

Discussion

9236.	The following equation represents double displacement reaction,what is the precipitate in this reaction? AgNO3(aq)+NaI(aq)→AgI(s)+NaNO3(aq)
Answer» The following equation represents double displacement reaction,what is the precipitate in this reaction? $A g N O_{3} (a q) + N a I (a q) \to A g I (s) + N a N O_{3} (a q)$

9236.

The following equation represents double displacement reaction,what is the precipitate in this reaction? AgNO3(aq)+NaI(aq)→AgI(s)+NaNO3(aq)

Answer»

The following equation represents double displacement reaction,what is the precipitate in this reaction?

$A g N O_{3} (a q) + N a I (a q) \to A g I (s) + N a N O_{3} (a q)$

Discussion

9237.	How is rain formed? [2 MARKS]
Answer» How is rain formed? [2 MARKS]

Discussion

9238.	State two effects of ozone depletion.
Answer» State two effects of ozone depletion.

Discussion

9239.	When α− particles are sent through a thin metal foil, most of them go straight through the foil because (one or more are correct)
Answer» When $α -$ particles are sent through a thin metal foil, most of them go straight through the foil because (one or more are correct)

Discussion

9240.	Which test will you carry out to find out if a given solution is saturated or unsaturated or supersaturated?
Answer» Which test will you carry out to find out if a given solution is saturated or unsaturated or supersaturated?

Discussion

9241.	Calculate the emf of the cell Pt, H2(1.0atm) \| CH3COOH (0.1M) \|\| NH3(aq, 0.001M) \| H2(1.0 atm), Pt Ka(CH3COOH) = 10−5, Kb(NH3) = 10−5
Answer» Calculate the emf of the cell Pt, $H_{2} (1.0 a t m)$ \| $C H_{3} C O O H$ (0.1M) \|\| $N H_{3}$ (aq, 0.001M) \| $H_{2}$ (1.0 atm), Pt Ka( $C H_{3} C O O H$ ) = $10^{- 5}$ , Kb(NH3) = $10^{- 5}$

9241.

Calculate the emf of the cell Pt, H2(1.0atm) | CH3COOH (0.1M) || NH3(aq, 0.001M) | H2(1.0 atm), Pt Ka(CH3COOH) = 10−5, Kb(NH3) = 10−5

Answer»

Calculate the emf of the cell

Pt, $H_{2} (1.0 a t m)$ | $C H_{3} C O O H$ (0.1M) || $N H_{3}$ (aq, 0.001M) | $H_{2}$ (1.0 atm), Pt Ka( $C H_{3} C O O H$ ) = $10^{- 5}$ , Kb(NH3) = $10^{- 5}$

Discussion

9242.	The pungent odour gas in the previous reaction is ___.
Answer» The pungent odour gas in the previous reaction is ___.

Discussion

9243.	What is horizon? Name the three horizons of the soil. [3 MARKS]
Answer» What is horizon? Name the three horizons of the soil. [3 MARKS]

Discussion

9244.	Which of following represent β −hydroxybutyrate− co− β −hydroxy valarate ?
Answer» $W h i c h o f f o l l o w i n g r e p r e s e n t β - h y d r o x y b u t y r a t e - c o - β - h y d r o x y v a l a r a t e ?$

Discussion

9245.	When 5 g of calcium is burnt in 2 g of oxygen, then 7 g of calcium oxide is produced. What mass of calcium oxide will be produced when 5 g of calcium is burnt in 20 g of oxygen ? Which law of chemical combination will govern your answer ?
Answer» When 5 g of calcium is burnt in 2 g of oxygen, then 7 g of calcium oxide is produced. What mass of calcium oxide will be produced when 5 g of calcium is burnt in 20 g of oxygen ? Which law of chemical combination will govern your answer ?

Discussion

9246.	Which of the following is more electronegative?
Answer» Which of the following is more electronegative?

Discussion

9247.	What is the reason for the slightly different physical properties of all the isotopes of an element?
Answer» What is the reason for the slightly different physical properties of all the isotopes of an element?

Discussion

9248.	The protons and neutrons are present together in the nucleus. They are collectively known as.................. __
Answer» The protons and neutrons are present together in the nucleus. They are collectively known as.................. __

Discussion

9249.	White phosphorus can be separated from red phosphorus by:
Answer» White phosphorus can be separated from red phosphorus by:

Discussion

9250.	Which of the following chemical formulae is correct?
Answer» Which of the following chemical formulae is correct?

Discussion

Explore topic-wise InterviewSolutions in .

Compare an electron and a proton in repsect of mass and charge.

Which of the following statement is true for elements?

What is a solution?

Electron affinity is the

Compare the properties of metals and non-metals with respect to (i) malleability (ii) ductility, and (iii) electrical conductivity.

Calculate the molar mass of the following substances: [5 MARKS] (a) Ethyne, C2H2 (b) Sulphur molecule, S8 (c) Phosphorus molecule, P4 (atomic mass of phosphorus = 31) (d) Hydrochloric acid, HCl (e) Nitric acid, HNO3

On converting 25∘C,38∘C and 66∘C to Kelvin scale, the correct swquence of temperatures will be : (a) 298 K, 311 K and 339 K (b) 298 K,300 K and 338 K (c) 273 k, 278 K, and 543 K (d) 298 K, 310 K and 338 K

_________ is a reliable measure of the degree of hotness or coldness of a body.

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

What is the precipitate formed when a pale green compound reacts with caustic soda to form dirty green gelatinous precipitate along with sodium sulphate?

What is the significance of the formula H2O ?

What is the gaseous product that is released when sodium bicarbonate reacts with sulphuric acid?

Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner Triad?

Which of the following will behave as a strong acid when added to water?

Gradiation in physical properties are observed in homologous series with increasing atomic mass.Give reason.

Activity to show that particles of matter are small in size

Give example of substances of daily life which depict the characteristics of matter

How much amount of NH3 is produced when 28 g of nitrogen react with 6 g of hydrogen?34

Which of the following is Photo-Chemical Reaction?

Is there anything which can travel faster than the speed of light.?

if blood is a homogenous mixture then how can it be called as a suspension rather than being as solution as solution are the only ones that are homogenous in nature ????

What happens when crystals of washing soda are left exposed to air?

I want one word or multiple choice questions for the lesson Hydrogen

In which of the following, Tyndall effect is not observed.

Hydrogen chloride is a ________ made of H+ and Cl- which are ______ and ______ respectively.

It is said that atmospheric pollution does not occur when Hydrogen is used as a fuel. What is the reason ?

(a) Give two symbols which have been derived from the "English names" of the elements. (b) Give two symbols which have been derived from the "Latin names" of the elements.

Is there any difference between flammable and inflammable ?

When a crystal of copper sulphate is placed at the bottom of a beaker containing water, the water slowly turns blue. Why ?

What are the conclusions of α-scattering experiment?

What are the maximum number of electrons that can be present in the K, L and M shells?

In a combination reaction, the number of products are:

For an endothermic reaction, energy of activation is Ea and enthalpy of reaction is ΔH (both of these in kJ/mol). Minimum value of Ea will be:

Which of the following bases are alkalis?

Which element has the highest ionisation energy and lowest ionisation energy?

The following equation represents double displacement reaction,what is the precipitate in this reaction? AgNO3(aq)+NaI(aq)→AgI(s)+NaNO3(aq)

How is rain formed? [2 MARKS]

State two effects of ozone depletion.

When α− particles are sent through a thin metal foil, most of them go straight through the foil because (one or more are correct)

Which test will you carry out to find out if a given solution is saturated or unsaturated or supersaturated?

Calculate the emf of the cell Pt, H2(1.0atm) | CH3COOH (0.1M) || NH3(aq, 0.001M) | H2(1.0 atm), Pt Ka(CH3COOH) = 10−5, Kb(NH3) = 10−5

The pungent odour gas in the previous reaction is ___.

What is horizon? Name the three horizons of the soil. [3 MARKS]

Which of following represent β −hydroxybutyrate− co− β −hydroxy valarate ?

When 5 g of calcium is burnt in 2 g of oxygen, then 7 g of calcium oxide is produced. What mass of calcium oxide will be produced when 5 g of calcium is burnt in 20 g of oxygen ? Which law of chemical combination will govern your answer ?

Which of the following is more electronegative?

What is the reason for the slightly different physical properties of all the isotopes of an element?

The protons and neutrons are present together in the nucleus. They are collectively known as.................. __

White phosphorus can be separated from red phosphorus by:

Which of the following chemical formulae is correct?

Hydrogen chloride is a made of H+ and Cl- which are and respectively.