15280 + Interview Questions in Chemistry Page 148 InterviewSolution

7351.	As known to us hydrogen has only one electron So to make an ion it would give electron or take electron
Answer» As known to us hydrogen has only one electron So to make an ion it would give electron or take electron

7351.

As known to us hydrogen has only one electron So to make an ion it would give electron or take electron

Answer»

As known to us hydrogen has only one electron

So to make an ion it would give electron or take electron

7352.	Mr. Ramu wants to electroplate his key chain with nickel to prevent rusting. For this electroplating:(i) Name the electrolyte(ii) Name the cathode(iii) Name the anode(iv) Give the reaction at the cathode(v) Give the reaction at the anode.
Answer» Mr. Ramu wants to electroplate his key chain with nickel to prevent rusting. For this electroplating: (i) Name the electrolyte (ii) Name the cathode (iii) Name the anode (iv) Give the reaction at the cathode (v) Give the reaction at the anode.

Discussion

7353.	(a) What is the molecular formula and structure of the alcohol which can be thought to be derived from pentane? (b) Write the names of the following functional groups : (c) What makes the candle flame yellow and luminous?
Answer» (a) What is the molecular formula and structure of the alcohol which can be thought to be derived from pentane? (b) Write the names of the following functional groups : (c) What makes the candle flame yellow and luminous?

Discussion

7354.	3 oz of sugar and 5 oz of flour is required to bake a cake. If 20 oz of flour is available, then find the amount sugar required.12
Answer» 3 oz of sugar and 5 oz of flour is required to bake a cake. If 20 oz of flour is available, then find the amount sugar required. 12

Discussion

7355.	How many faradays of electricity will be required tocompletely electrolyse one mole of molten Al203 to produceAl metal and O2 gas?JEE (West Bengal) 2005)
Answer» How many faradays of electricity will be required to completely electrolyse one mole of molten Al203 to produce Al metal and O2 gas? JEE (West Bengal) 2005)

Discussion

7356.	16. Why 8 is used for the atomic mass of 02 in the definition of Equivalent weight
Answer» 16. Why 8 is used for the atomic mass of 02 in the definition of Equivalent weight

Discussion

7357.	relation between mili coloumb and coloumb
Answer» relation between mili coloumb and coloumb

Discussion

7358.	36. Aq. solution of inorganic salt (X) is yellow. On addition of H2SO4 colour of solution remain yellow but when react with H2S in acidic medium, produce light green solution (Y) and turbidity of sulphur. Inorganic salt (X) is - 1. Na2CrO4 2. FeCl3 3. (1) & (2) both are possible 4. CdSO4 Select incorrect about green solution of "Y" 1. Produce ppt with excess of NaOH 2. Produce yellow solution with dil.HNO3 3. Produce orange solution with H2O2/OH 4. Produce blue ppt. with K3 [Fe(CN)6]
Answer» 36. Aq. solution of inorganic salt (X) is yellow. On addition of H2SO4 colour of solution remain yellow but when react with H2S in acidic medium, produce light green solution (Y) and turbidity of sulphur. Inorganic salt (X) is - 1. Na2CrO4 2. FeCl3 3. (1) & (2) both are possible 4. CdSO4 Select incorrect about green solution of "Y" 1. Produce ppt with excess of NaOH 2. Produce yellow solution with dil.HNO3 3. Produce orange solution with H2O2/OH 4. Produce blue ppt. with K3 [Fe(CN)6]

Discussion

7359.	List some difference between an atom or a molecule.
Answer» List some difference between an atom or a molecule.

Discussion

7360.	An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:a) Calciumb) Carbonc) Silicond) Iron
Answer» An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be: a) Calcium b) Carbon c) Silicon d) Iron

Discussion

7361.	Choose the nonmetallic oxides from the following:
Answer» Choose the nonmetallic oxides from the following:

Discussion

7362.	3. A hydrocarbon of molecular Mass 72g/mol gives a single monochloro derivative and two dichloro derivative on photo chlorination. Give the structures of the hydrocarbons with explanation and reactions.
Answer» 3. A hydrocarbon of molecular Mass 72g/mol gives a single monochloro derivative and two dichloro derivative on photo chlorination. Give the structures of the hydrocarbons with explanation and reactions.

Discussion

7363.	Write the chemical reaction where the following changes are observed.(a) Gas is evolved(b) Colour change is noticed(c) Precipitate is formed(d) Physical state is changed
Answer» Write the chemical reaction where the following changes are observed. (a) Gas is evolved (b) Colour change is noticed (c) Precipitate is formed (d) Physical state is changed

7363.

Write the chemical reaction where the following changes are observed.(a) Gas is evolved(b) Colour change is noticed(c) Precipitate is formed(d) Physical state is changed

Answer»

Write the chemical reaction where the following changes are observed.

(a) Gas is evolved

(b) Colour change is noticed

(c) Precipitate is formed

(d) Physical state is changed

Discussion

7364.	Write the equation for the following:Ammonium chloride is treated with sodium hydroxide.
Answer» Write the equation for the following: Ammonium chloride is treated with sodium hydroxide.

Discussion

7365.	What are the characteristics of a chemical equilibrium?
Answer» What are the characteristics of a chemical equilibrium?

Discussion

7366.	The correct formula for blue vitriol is :
Answer» The correct formula for blue vitriol is :

Discussion

7367.	pH of tomato juice is 4.4.Then concentration of H_3O^+ will be
Answer» pH of tomato juice is 4.4.Then concentration of H_3O^+ will be

Discussion

7368.	What is the colour of pure sulphuric acid
Answer» What is the colour of pure sulphuric acid

Discussion

7369.	How many moles of aluminium sulphate will contain 0.24 moles of oxygen atoms ?
Answer» How many moles of aluminium sulphate will contain 0.24 moles of oxygen atoms ?

Discussion

7370.	while writing compile form...for eg compile form of butane is ch3ch2ch2ch3 from where do we start countin from left side or right side of a electron dot stucture............
Answer» while writing compile form...for eg compile form of butane is ch3ch2ch2ch3 from where do we start countin from left side or right side of a electron dot stucture............

7370.

while writing compile form...for eg compile form of butane is ch3ch2ch2ch3 from where do we start countin from left side or right side of a electron dot stucture............

Answer»

while writing compile form...for eg compile form of butane is

ch3ch2ch2ch3 from where do we start countin from left side or right side of a electron dot stucture............

Discussion

7371.	(3) Rate = K' [NO!" [02] (4) If the volume of closed vessel in which the following simple reaction is carried out is reduced to one hird of original volume, the rate of reaction becomes 2NO (g) + 02 (g)2NO2 (g)
Answer» (3) Rate = K' [NO!" [02] (4) If the volume of closed vessel in which the following simple reaction is carried out is reduced to one hird of original volume, the rate of reaction becomes 2NO (g) + 02 (g)2NO2 (g)

Discussion

7372.	What happens to metal oxide when reacted with water?
Answer» What happens to metal oxide when reacted with water?

Discussion

7373.	Balance the following chemical equations : (a) FeSO4 Heat⟶ Fe2O3+SO2 + SO3 (b) Pb(NO3)2 (s) Heat⟶ PbO(s)+NO2(g)+O2(g)
Answer» Balance the following chemical equations : (a) $F e S O_{4}$ $H e a t ⟶$ $F e_{2} O_{3} + S O_{2} + S O_{3}$ (b) $P b (N O_{3})_{2} (s)$ $H e a t ⟶$ $P b O (s) + N O_{2} (g) + O_{2} (g)$

7373.

Balance the following chemical equations : (a) FeSO4 Heat⟶ Fe2O3+SO2 + SO3 (b) Pb(NO3)2 (s) Heat⟶ PbO(s)+NO2(g)+O2(g)

Answer»

Balance the following chemical equations :

(a) $F e S O_{4}$ $H e a t ⟶$ $F e_{2} O_{3} + S O_{2} + S O_{3}$

(b) $P b (N O_{3})_{2} (s)$ $H e a t ⟶$ $P b O (s) + N O_{2} (g) + O_{2} (g)$

Discussion

7374.	Identify the alcohol which undergoes dehydration more easily among the following.
Answer» Identify the alcohol which undergoes dehydration more easily among the following.

Discussion

7375.	28.the reference calomel electrode is made from which of the following?
Answer» 28.the reference calomel electrode is made from which of the following?

Discussion

7376.	When you add sodium hydrogen carbonate to acetic acid in a test tube, a gas liberates immediately with a brisk effervescence. Name this gas. Describe the method of testing this gas.
Answer» When you add sodium hydrogen carbonate to acetic acid in a test tube, a gas liberates immediately with a brisk effervescence. Name this gas. Describe the method of testing this gas.

Discussion

7377.	Ammonium hydroxide added to magnesium chloride gives _____ and the precipitate so formed is of _____.
Answer» Ammonium hydroxide added to magnesium chloride gives _____ and the precipitate so formed is of _____.

Discussion

7378.	How does the graph of molar conductivity vs square root of concentration look like for NaCl?
Answer» How does the graph of molar conductivity vs square root of concentration look like for NaCl?

Discussion

7379.	Which of the following statements are correct with respect to natural resources?
Answer» Which of the following statements are correct with respect to natural resources?

Discussion

7380.	a gaseous reaction 2A-->4B+C is carried out in closed vessel the concentration of B is found to increase by 5×10^{-3} mol per liter in 10 sec calculate rate of appreance of \{B and rate ofdisappreance of \{A\
Answer» a gaseous reaction 2A-->4B+C is carried out in closed vessel the concentration of B is found to increase by 5×10^{-3} mol per liter in 10 sec calculate rate of appreance of \{B and rate ofdisappreance of \{A\

Discussion

7381.	pH of one solution is 8 and that of other is 5. Which solution is more acidic by how much times?
Answer» pH of one solution is 8 and that of other is 5. Which solution is more acidic by how much times?

Discussion

7382.	What happens when a) Hydrogen gas combines with nitrogen gas . b) Hydrogen sulphide gas burns in air . c) Barium chlloride reacts with aluminum sulphate . d) Acid react with bases e) Potaissium reacts with water
Answer» What happens when a) Hydrogen gas combines with nitrogen gas . b) Hydrogen sulphide gas burns in air . c) Barium chlloride reacts with aluminum sulphate . d) Acid react with bases e) Potaissium reacts with water

Discussion

7383.	Blue vitriol has
Answer» Blue vitriol has

Discussion

7384.	What is blister copper
Answer» What is blister copper

Discussion

7385.	CH3COOH + HCl gives
Answer» CH3COOH + HCl gives

Discussion

7386.	CuO + H2SO4 → CuSO4 + H2O is an example of which property of the sulphuric acid?
Answer» CuO + H₂SO₄ → CuSO₄ + H₂O is an example of which property of the sulphuric acid?

Discussion

7387.	is mgh2 ionic or covalent?
Answer» is mgh2 ionic or covalent?

Discussion

7388.	Give three uses of ethanol.
Answer» Give three uses of ethanol.

Discussion

7389.	The chemical formula of brown ring formed in the brown ring test is .
Answer» The chemical formula of brown ring formed in the brown ring test is .

Discussion

7390.	Complete the following neutralisation reaction: + AgOH(s)→ AgI(s) + H2O(l)
Answer» Complete the following neutralisation reaction: + $A g O H (s) \to$ $A g I (s)$ + $H_{2} O (l)$

Discussion

7391.	which of the following shows resonance 1)cyclohexane 2)cyclohexene 3)1,4cyclohexadiene 4)1,3cyclohexadien
Answer» which of the following shows resonance 1)cyclohexane 2)cyclohexene 3)1,4cyclohexadiene 4)1,3cyclohexadien

Discussion

7392.	Calculate the mass of lime obtained by heating 200g of 95% pure limestone.
Answer» Calculate the mass of lime obtained by heating 200g of 95% pure limestone.

Discussion

7393.	Chemically rust is:
Answer» Chemically rust is:

Discussion

7394.	Which of the following is correct for the solubility of CO2 in water?
Answer» Which of the following is correct for the solubility of CO₂in water?

Discussion

7395.	the succesive crest and trough of a wave 30cm apart. find the wavelength
Answer» the succesive crest and trough of a wave 30cm apart. find the wavelength

Discussion

7396.	the main scale of a vernier calliper has n division/cm . n division of the vernier scale ocincide with [n-1] division of main scale .The least count of the vernier callipper is
Answer» the main scale of a vernier calliper has n division/cm . n division of the vernier scale ocincide with [n-1] division of main scale .The least count of the vernier callipper is

Discussion

7397.	Explain the following terms.(1) Minerals(2) Gangue(3) Ores(4) Metallurgy(5) Roasting
Answer» Explain the following terms. (1) Minerals (2) Gangue (3) Ores (4) Metallurgy (5) Roasting

7397.

Explain the following terms.(1) Minerals(2) Gangue(3) Ores(4) Metallurgy(5) Roasting

Answer»

Explain the following terms.

(1) Minerals

(2) Gangue

(3) Ores

(4) Metallurgy

(5) Roasting

Discussion

7398.	In which of the following reaction the physical state of the reactants or the product is not correctly represented?
Answer» In which of the following reaction the physical state of the reactants or the product is not correctly represented?

Discussion

7399.	What will happen to the garbage, and dead animals and plants in the absence of decomposers? Will the natural replenishment of the soil take place, even if decomposers are not there?
Answer» What will happen to the garbage, and dead animals and plants in the absence of decomposers? Will the natural replenishment of the soil take place, even if decomposers are not there?

Discussion

7400.	Which of the following equations obeys the law of conservation of mass?
Answer» Which of the following equations obeys the law of conservation of mass?

Discussion

Explore topic-wise InterviewSolutions in .

As known to us hydrogen has only one electron So to make an ion it would give electron or take electron

Mr. Ramu wants to electroplate his key chain with nickel to prevent rusting. For this electroplating:(i) Name the electrolyte(ii) Name the cathode(iii) Name the anode(iv) Give the reaction at the cathode(v) Give the reaction at the anode.

(a) What is the molecular formula and structure of the alcohol which can be thought to be derived from pentane? (b) Write the names of the following functional groups : (c) What makes the candle flame yellow and luminous?

3 oz of sugar and 5 oz of flour is required to bake a cake. If 20 oz of flour is available, then find the amount sugar required.12

How many faradays of electricity will be required tocompletely electrolyse one mole of molten Al203 to produceAl metal and O2 gas?JEE (West Bengal) 2005)

16. Why 8 is used for the atomic mass of 02 in the definition of Equivalent weight

relation between mili coloumb and coloumb

List some difference between an atom or a molecule.

An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:a) Calciumb) Carbonc) Silicond) Iron

Choose the nonmetallic oxides from the following:

3. A hydrocarbon of molecular Mass 72g/mol gives a single monochloro derivative and two dichloro derivative on photo chlorination. Give the structures of the hydrocarbons with explanation and reactions.

Write the chemical reaction where the following changes are observed.(a) Gas is evolved(b) Colour change is noticed(c) Precipitate is formed(d) Physical state is changed

Write the equation for the following:Ammonium chloride is treated with sodium hydroxide.

What are the characteristics of a chemical equilibrium?

The correct formula for blue vitriol is :

pH of tomato juice is 4.4.Then concentration of H_3O^+ will be

What is the colour of pure sulphuric acid

How many moles of aluminium sulphate will contain 0.24 moles of oxygen atoms ?

while writing compile form...for eg compile form of butane is ch3ch2ch2ch3 from where do we start countin from left side or right side of a electron dot stucture............

(3) Rate = K' [NO!" [02] (4) If the volume of closed vessel in which the following simple reaction is carried out is reduced to one hird of original volume, the rate of reaction becomes 2NO (g) + 02 (g)2NO2 (g)

What happens to metal oxide when reacted with water?

Balance the following chemical equations : (a) FeSO4 Heat⟶ Fe2O3+SO2 + SO3 (b) Pb(NO3)2 (s) Heat⟶ PbO(s)+NO2(g)+O2(g)

Identify the alcohol which undergoes dehydration more easily among the following.

28.the reference calomel electrode is made from which of the following?

When you add sodium hydrogen carbonate to acetic acid in a test tube, a gas liberates immediately with a brisk effervescence. Name this gas. Describe the method of testing this gas.

Ammonium hydroxide added to magnesium chloride gives _____ and the precipitate so formed is of _____.

How does the graph of molar conductivity vs square root of concentration look like for NaCl?

Which of the following statements are correct with respect to natural resources?

a gaseous reaction 2A-->4B+C is carried out in closed vessel the concentration of B is found to increase by 5×10^{-3} mol per liter in 10 sec calculate rate of appreance of \{B and rate ofdisappreance of \{A\

pH of one solution is 8 and that of other is 5. Which solution is more acidic by how much times?

What happens when a) Hydrogen gas combines with nitrogen gas . b) Hydrogen sulphide gas burns in air . c) Barium chlloride reacts with aluminum sulphate . d) Acid react with bases e) Potaissium reacts with water

Blue vitriol has

What is blister copper

CH3COOH + HCl gives

CuO + H2SO4 → CuSO4 + H2O is an example of which property of the sulphuric acid?

is mgh2 ionic or covalent?

Give three uses of ethanol.

The chemical formula of brown ring formed in the brown ring test is .

Complete the following neutralisation reaction: + AgOH(s)→ AgI(s) + H2O(l)

which of the following shows resonance 1)cyclohexane 2)cyclohexene 3)1,4cyclohexadiene 4)1,3cyclohexadien

Calculate the mass of lime obtained by heating 200g of 95% pure limestone.

Chemically rust is:

Which of the following is correct for the solubility of CO2 in water?

the succesive crest and trough of a wave 30cm apart. find the wavelength

the main scale of a vernier calliper has n division/cm . n division of the vernier scale ocincide with [n-1] division of main scale .The least count of the vernier callipper is

Explain the following terms.(1) Minerals(2) Gangue(3) Ores(4) Metallurgy(5) Roasting

In which of the following reaction the physical state of the reactants or the product is not correctly represented?

What will happen to the garbage, and dead animals and plants in the absence of decomposers? Will the natural replenishment of the soil take place, even if decomposers are not there?

Which of the following equations obeys the law of conservation of mass?

Ammonium hydroxide added to magnesium chloride gives _ and the precipitate so formed is of _.