7248 + Interview Questions in Chemistry Page 4 InterviewSolution

151.	Which of the following help in lowering the melting point of ice and why? The options are :- Sugar Salt Milk Water
Answer» Which of the following help in lowering the melting point of ice and why? The options are :- Sugar Salt Milk Water

151.

Which of the following help in lowering the melting point of ice and why? The options are :- Sugar Salt Milk Water

Answer»

Which of the following help in lowering the melting point of ice and why?

The options are :-

Sugar

Salt

Milk

Water

Discussion

152.	Concept of peroxy bond in detail .
Answer» Concept of peroxy bond in detail .

Discussion

153.	how does the LED bulb starts glowing when a zinc nail and a copper coin is connected to the lemon ?
Answer» how does the LED bulb starts glowing when a zinc nail and a copper coin is connected to the lemon ?

Discussion

154.	According to classical idea of redox reactions the given example is of 2 Mg(s) + O2 (g) → 2 MgO(s)
Answer» According to classical idea of redox reactions the given example is of 2 Mg_(s) + O_{2 (g)} → 2 MgO_(s)

154.

According to classical idea of redox reactions the given example is of 2 Mg(s) + O2 (g) → 2 MgO(s)

Answer»

According to classical idea of redox reactions the given example is of

2 Mg_(s) + O_{2 (g)} → 2 MgO_(s)

Discussion

155.	Question 1 (h)Classify the following as chemical or physical changes: h. Burning of paper and wood
Answer» Question 1 (h) Classify the following as chemical or physical changes: h. Burning of paper and wood

Discussion

156.	What are the three common states of matter? Which state of matter is rigid and why?
Answer» What are the three common states of matter? Which state of matter is rigid and why?

Discussion

157.	Reliez les éléments de la colonne A et B. A B1. Le T.G.V. (a) Lieu de départ et arrivée des trains.2. La gare (b) Valider le billet au composteur.3. Composter (c) Qui arrive à l'heure.4. Ponctuel (d) Train à Grande Vitesse.
Answer» Reliez les éléments de la colonne A et B. A B 1. Le T.G.V. (a) Lieu de départ et arrivée des trains. 2. La gare (b) Valider le billet au composteur. 3. Composter (c) Qui arrive à l'heure. 4. Ponctuel (d) Train à Grande Vitesse.

Discussion

158.	CaO+C\xrightarrow[{heating}]{Strong}A\xrightarrow{N_2}B. A and B are (1) CaC_2 and Ca(CN)_2 (2) Ca_2C and CaCN_2 (3)Ca_2C_3 and Ca(CN)_2 (4) CaC_2 and CaCN_{
Answer» CaO+C\xrightarrow[{heating}]{Strong}A\xrightarrow{N_2}B. A and B are (1) CaC_2 and Ca(CN)_2 (2) Ca_2C and CaCN_2 (3)Ca_2C_3 and Ca(CN)_2 (4) CaC_2 and CaCN_{

Discussion

159.	can two hydrogen atom form a bond with carbon?
Answer» can two hydrogen atom form a bond with carbon?

Discussion

160.	Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?
Answer» Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?

Discussion

161.	Question 12Elements with valency 1 are(a) always metals(b) always metalloids(c) either metals or non-metals(d) always non-metals
Answer» Question 12 Elements with valency 1 are (a) always metals (b) always metalloids (c) either metals or non-metals (d) always non-metals

Discussion

162.	Q.What will be the amount of ice that will separate out on cooling a solution containing 50g ethylene glycol ( M-62) in 200g water upto - 9.3 degree celsius (kf H2O =1.86KKg/mol)?
Answer» Q.What will be the amount of ice that will separate out on cooling a solution containing 50g ethylene glycol ( M-62) in 200g water upto - 9.3 degree celsius (kf H2O =1.86KKg/mol)?

Discussion

163.	A solution is dilute if it
Answer» A solution is dilute if it

Discussion

164.	why lone pair lone pair repulsion ia greater than bond pair bond pair repulsion
Answer» why lone pair lone pair repulsion ia greater than bond pair bond pair repulsion

Discussion

165.	What is the mole and molecules in 64 g of o2? What is the mass of 1 molecule of o2?
Answer» What is the mole and molecules in 64 g of o2? What is the mass of 1 molecule of o2?

Discussion

166.	Should the handle and bristles of the toothbrush be made of the same material? Explain your answer.
Answer» Should the handle and bristles of the toothbrush be made of the same material? Explain your answer.

Discussion

167.	Can you store lemon pickle in an aluminium utensil ? Explain.
Answer» Can you store lemon pickle in an aluminium utensil ? Explain.

Discussion

168.	In the given diagrams, the circular rings around the nucleus represents:
Answer» In the given diagrams, the circular rings around the nucleus represents:

Discussion

169.	Which of these is a correct method of treatment of mild burns?
Answer» Which of these is a correct method of treatment of mild burns?

Discussion

170.	3g of H_{2 react with 29 .0g ofO_{2 to give water}} the maximum amount of H_{2 O formed i
Answer» 3g of H_{2 react with 29 .0g ofO_{2 to give water}} the maximum amount of H_{2 O formed i

Discussion

171.	12.Name the anions responsible for permanent hardness of water.explain with detail
Answer» 12.Name the anions responsible for permanent hardness of water.explain with detail

Discussion

172.	Which of the following is/are uses of dry ice?
Answer» Which of the following is/are uses of dry ice?

Discussion

173.	Which of the following properties is shown by gypsum?
Answer» Which of the following properties is shown by gypsum?

Discussion

174.	In the below image arrow (A) represents the heat going out while arrow (B) represents the heat coming in. Identify these types of reactions from the given options.
Answer» In the below image arrow (A) represents the heat going out while arrow (B) represents the heat coming in. Identify these types of reactions from the given options.

174.

In the below image arrow (A) represents the heat going out while arrow (B) represents the heat coming in. Identify these types of reactions from the given options.

Answer»

In the below image arrow (A) represents the heat going out while arrow (B) represents the heat coming in. Identify these types of reactions from the given options.

Discussion

175.	An unknown sample scatters light. When it is passed through a filter paper, it leaves some residue on the filter paper. The sample is most likely a
Answer» An unknown sample scatters light. When it is passed through a filter paper, it leaves some residue on the filter paper. The sample is most likely a

Discussion

176.	The expression for kinetic Energy K.E. is :
Answer» The expression for kinetic Energy K.E. is :

Discussion

177.	Explain the picture in your own words.
Answer» Explain the picture in your own words.

Discussion

178.	Question: If air resistance is zero, the sum of potential and kinetic energy of a freely falling body will
Answer» Question: If air resistance is zero, the sum of potential and kinetic energy of a freely falling body will

Discussion

179.	WHY DOES KEROSENE HAVE MORE CALORIFIC VALUE THAN PETROLEUM?
Answer» WHY DOES KEROSENE HAVE MORE CALORIFIC VALUE THAN PETROLEUM?

Discussion

180.	compare acidic strength (1)CHCl3 (2)CHF3 (3)CH3-CH3
Answer» compare acidic strength (1)CHCl3 (2)CHF3 (3)CH3-CH3

Discussion

181.	bond angle order of I3+,ICL2+,IBR2
Answer» bond angle order of I3+,ICL2+,IBR2

Discussion

182.	Which noble gas has the lowest melting and boiling points of all the elements?
Answer» Which noble gas has the lowest melting and boiling points of all the elements?

Discussion

183.	Metals react with acids to produce ___ gas.
Answer» Metals react with acids to produce ___ gas.

Discussion

184.	Question 1(i)What is observed when a solution of potassium iodide solution is added to a solution of lead nitrate? (ii)Name the type of reaction.
Answer» Question 1 (i)What is observed when a solution of potassium iodide solution is added to a solution of lead nitrate? (ii)Name the type of reaction.

184.

Question 1(i)What is observed when a solution of potassium iodide solution is added to a solution of lead nitrate? (ii)Name the type of reaction.

Answer»

Question 1

(i)What is observed when a solution of potassium iodide solution is added to a solution of lead nitrate?

(ii)Name the type of reaction.

Discussion

185.	Why is the rusting of iron termed as a chemical change?
Answer» Why is the rusting of iron termed as a chemical change?

Discussion

186.	An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centers of the faces of the cube. The empirical formula for this compound would be:
Answer» An ionic compound has a unit cell consisting of $A$ ions at the corners of a cube and $B$ ions on the centers of the faces of the cube. The empirical formula for this compound would be:

Discussion

187.	The ionic radii of Cs+ and Ce- are 1.69 angstrom and 181 angstrom respectively. The edge length of unit cell isA. 4.04 angstromB. 3.50 angstromC. 7.00 angstromD. None of these
Answer» The ionic radii of Cs+ and Ce- are 1.69 angstrom and 181 angstrom respectively. The edge length of unit cell is A. 4.04 angstrom B. 3.50 angstrom C. 7.00 angstrom D. None of these

Discussion

188.	Give instances for water undergoing a physical change and a chemical change.
Answer» Give instances for water undergoing a physical change and a chemical change.

Discussion

189.	Repulsive forces arise between:
Answer» Repulsive forces arise between:

Discussion

190.	Straw is a thermosetting plastics or thermoplastics?
Answer» Straw is a thermosetting plastics or thermoplastics?

Discussion

191.	Explain why the following are made of thermosetting plastics.Electric plugs/switches/plug boards
Answer» Explain why the following are made of thermosetting plastics. Electric plugs/switches/plug boards

Discussion

192.	Metal Reactivity series is based on:
Answer» Metal Reactivity series is based on:

Discussion

193.	A solid compound X on heating gives CO2 gas and a residue. The residue mixed with water forms Y. On passing an excess of CO2 through Y in water a clear solution Z is obtained. On boiling Z, compound X is reformed. The compound X is:
Answer» A solid compound $X$ on heating gives $C O_{2}$ gas and a residue. The residue mixed with water forms $Y$ . On passing an excess of $C O_{2}$ through $Y$ in water a clear solution $Z$ is obtained. On boiling $Z$ , compound $X$ is reformed. The compound $X$ is:

Discussion

194.	Which process is used to obtain petrol, kerosene and diesel from crude oil?
Answer» Which process is used to obtain petrol, kerosene and diesel from crude oil?

Discussion

195.	35. What is the molality of a 1l solution of sulphuric acid which is 46%wt/vol?
Answer» 35. What is the molality of a 1l solution of sulphuric acid which is 46%wt/vol?

Discussion

196.	Which of the following sets comprises of natural fibres only?
Answer» Which of the following sets comprises of natural fibres only?

Discussion

197.	2. Number of atoms present in 0.1 mole of triatomic gas is if N. Is 6.02 * 10 23
Answer» 2. Number of atoms present in 0.1 mole of triatomic gas is if N. Is 6.02 * 10 23

Discussion

198.	If an atom of an element has 34 electrons in total, then which orbit is the outermost orbit of the atom and how many valence electrons it contains?
Answer» If an atom of an element has 34 electrons in total, then which orbit is the outermost orbit of the atom and how many valence electrons it contains?

Discussion

199.	A jeweller has two different samples of white gold. The first sample has two elements, gold and palladium in its composition. The second sample has gold and nickel in its composition. Both the samples are identical in appearance and have a uniform composition throughout. What can be said about the samples?
Answer» A jeweller has two different samples of white gold. The first sample has two elements, gold and palladium in its composition. The second sample has gold and nickel in its composition. Both the samples are identical in appearance and have a uniform composition throughout. What can be said about the samples?

Discussion

200.	Bleaching powder is obtained, when slaked lime reacts with ______.
Answer» Bleaching powder is obtained, when slaked lime reacts with ______.

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following help in lowering the melting point of ice and why? The options are :- Sugar Salt Milk Water

Concept of peroxy bond in detail .

how does the LED bulb starts glowing when a zinc nail and a copper coin is connected to the lemon ?

According to classical idea of redox reactions the given example is of 2 Mg(s) + O2 (g) → 2 MgO(s)

Question 1 (h)Classify the following as chemical or physical changes: h. Burning of paper and wood

What are the three common states of matter? Which state of matter is rigid and why?

Reliez les éléments de la colonne A et B. A B1. Le T.G.V. (a) Lieu de départ et arrivée des trains.2. La gare (b) Valider le billet au composteur.3. Composter (c) Qui arrive à l'heure.4. Ponctuel (d) Train à Grande Vitesse.

CaO+C\xrightarrow[{heating}]{Strong}A\xrightarrow{N_2}B. A and B are (1) CaC_2 and Ca(CN)_2 (2) Ca_2C and CaCN_2 (3)Ca_2C_3 and Ca(CN)_2 (4) CaC_2 and CaCN_{

can two hydrogen atom form a bond with carbon?

Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?

Question 12Elements with valency 1 are(a) always metals(b) always metalloids(c) either metals or non-metals(d) always non-metals

Q.What will be the amount of ice that will separate out on cooling a solution containing 50g ethylene glycol ( M-62) in 200g water upto - 9.3 degree celsius (kf H2O =1.86KKg/mol)?

A solution is dilute if it

why lone pair lone pair repulsion ia greater than bond pair bond pair repulsion

What is the mole and molecules in 64 g of o2? What is the mass of 1 molecule of o2?

Should the handle and bristles of the toothbrush be made of the same material? Explain your answer.​

Can you store lemon pickle in an aluminium utensil ? Explain.

In the given diagrams, the circular rings around the nucleus represents:

Which of these is a correct method of treatment of mild burns?

3g of H_{2 react with 29 .0g ofO_{2 to give water}} the maximum amount of H_{2 O formed i

12.Name the anions responsible for permanent hardness of water.explain with detail

Which of the following is/are uses of dry ice?

Which of the following properties is shown by gypsum?

In the below image arrow (A) represents the heat going out while arrow (B) represents the heat coming in. Identify these types of reactions from the given options.

An unknown sample scatters light. When it is passed through a filter paper, it leaves some residue on the filter paper. The sample is most likely a

The expression for kinetic Energy K.E. is :

Explain the picture in your own words.

Question: If air resistance is zero, the sum of potential and kinetic energy of a freely falling body will

WHY DOES KEROSENE HAVE MORE CALORIFIC VALUE THAN PETROLEUM?

compare acidic strength (1)CHCl3 (2)CHF3 (3)CH3-CH3

bond angle order of I3+,ICL2+,IBR2

Which noble gas has the lowest melting and boiling points of all the elements?

Metals react with acids to produce ___ gas.

Question 1(i)What is observed when a solution of potassium iodide solution is added to a solution of lead nitrate? (ii)Name the type of reaction.

Why is the rusting of iron termed as a chemical change?

An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centers of the faces of the cube. The empirical formula for this compound would be:

The ionic radii of Cs+ and Ce- are 1.69 angstrom and 181 angstrom respectively. The edge length of unit cell isA. 4.04 angstromB. 3.50 angstromC. 7.00 angstromD. None of these

Give instances for water undergoing a physical change and a chemical change.

Repulsive forces arise between:

Straw is a thermosetting plastics or thermoplastics?

Explain why the following are made of thermosetting plastics.Electric plugs/switches/plug boards

Metal Reactivity series is based on:

A solid compound X on heating gives CO2 gas and a residue. The residue mixed with water forms Y. On passing an excess of CO2 through Y in water a clear solution Z is obtained. On boiling Z, compound X is reformed. The compound X is:

Which process is used to obtain petrol, kerosene and diesel from crude oil?

35. What is the molality of a 1l solution of sulphuric acid which is 46%wt/vol?

Which of the following sets comprises of natural fibres only?

2. Number of atoms present in 0.1 mole of triatomic gas is if N. Is 6.02 * 10 23

If an atom of an element has 34 electrons in total, then which orbit is the outermost orbit of the atom and how many valence electrons it contains?

Bleaching powder is obtained, when slaked lime reacts with ______.

Should the handle and bristles of the toothbrush be made of the same material? Explain your answer.