5083 + Interview Questions in Chemistry Page 46 InterviewSolution

2251.	Question 1.Differentiate: Slow and Fast change Natural and man-made change
Answer» Question 1. Differentiate: Slow and Fast change Natural and man-made change

2251.

Question 1.Differentiate: Slow and Fast change Natural and man-made change

Answer»

Question 1.

Differentiate:

Slow and Fast change

Natural and man-made change

2252.	Species is
Answer» Species is

Discussion

2253.	24. In Victor Meyer's Method, 0.2 gm of an organic compound displaced 56 mL of air at S.T.P. The molecular weight of compound is
Answer» 24. In Victor Meyer's Method, 0.2 gm of an organic compound displaced 56 mL of air at S.T.P. The molecular weight of compound is

Discussion

2254.	E∘ for the cell Zn\|Zn2+(aq)\|\|Cu2+(aq)\|Cu) is 1.10 v at 25∘. The equilibrium constant for the reactionZn+Cu2+(aq)→Cu+Zn2+(aq) is of the order of:
Answer» $E^{\circ}$ for the cell $Z n \| Z n^{2 +} (a q) \| \| C u^{2 +} (a q) \| C u)$ is $1.10 v$ at $25^{\circ}$ . The equilibrium constant for the reaction $Z n + C u^{2 +} (a q) \to C u + Z n^{2 +} (a q)$ is of the order of:

Discussion

2255.	Which of the following is a homogeneous mixture?
Answer» Which of the following is a homogeneous mixture?

Discussion

2256.	For the equation in acidic medium: S2O2−3(aq)+Cr2O2−7(aq)→S4O2−6(aq)+Cr3+(aq)The coefficient of H+ in the balanced reaction by oxidation number method will be
Answer» For the equation in acidic medium: $S_{2} O_{3}^{2 -} (a q) + C r_{2} O_{7}^{2 -} (a q) \to S_{4} O_{6}^{2 -} (a q) + C r^{3 +} (a q)$ The coefficient of $H^{+}$ in the balanced reaction by oxidation number method will be

Discussion

2257.	66 Two elements X and Y (atomic mass of X= 75, Y= 16) combines to give a compound having 76% of X. The formula of the compound is
Answer» 66 Two elements X and Y (atomic mass of X= 75, Y= 16) combines to give a compound having 76% of X. The formula of the compound is

Discussion

2258.	Muthodi is a conservation area where tourists are allowed in safaris to observe wildlife. Tribal communities are also allowed to use the forest for their requirements though they are not allowed to hunt. What type of conservation area is Muthodi?
Answer» Muthodi is a conservation area where tourists are allowed in safaris to observe wildlife. Tribal communities are also allowed to use the forest for their requirements though they are not allowed to hunt. What type of conservation area is Muthodi?

Discussion

2259.	What is an ionic bond? Explain with an example.
Answer» What is an ionic bond? Explain with an example.

Discussion

2260.	When we add water to milk, they form a homogeneous mixture because:
Answer» When we add water to milk, they form a homogeneous mixture because:

Discussion

2261.	The substance which will change the colour of red cabbage solution to dark green is
Answer» The substance which will change the colour of red cabbage solution to dark green is

Discussion

2262.	2. The concentreatiln of sucrose solution which is isotonic with 0.02 M solution of Na2SO4 T 30 degree celcius
Answer» 2. The concentreatiln of sucrose solution which is isotonic with 0.02 M solution of Na2SO4 T 30 degree celcius

Discussion

2263.	When Eno fruit salt is mixed with water, bubbles are formed. What type of change is it? Explain [5 MARKS]
Answer» When Eno fruit salt is mixed with water, bubbles are formed. What type of change is it? Explain [5 MARKS]

Discussion

2264.	The emf of the cell, Pt\|H2(1 atm),\|H+ (0.1 M, 40 mL)\|\|Ag+(0.8 mM)\|Ag is 0.9 V. Calculate the emf when 60 mL of 0.05 M NaOH is added to the anodic compartment.Given: 2.303RTF=0.06,log2=0.3
Answer» The emf of the cell, $P t \| H_{2} (1 atm), \| H^{+} (0.1 M, 40 mL) \| \| A g^{+} (0.8 mM) \| A g$ is $0.9 V$ . Calculate the emf when $60 mL$ of $0.05 M N a O H$ is added to the anodic compartment. Given: $\frac{2.303 R T}{F} = 0.06, log 2 = 0.3$

Discussion

2265.	A compound has vapour density 29. On warming with a solution of iodine in alkali, it gives a yellow precipitate, the compound is---- 1. CH3CH2CHO 2. CH3COCH3 3. CH3CHOHCH3 4. CH2CH2CH2Br
Answer» A compound has vapour density 29. On warming with a solution of iodine in alkali, it gives a yellow precipitate, the compound is---- 1. CH3CH2CHO 2. CH3COCH3 3. CH3CHOHCH3 4. CH2CH2CH2Br

Discussion

2266.	Which of the following compounds is not colored yellow?
Answer» Which of the following compounds is not colored yellow?

Discussion

2267.	which of the following equations is not balanced.(1)caco_{3 →}cao + co_2 (2) NaNo_3→ NaNo_2+O_{
Answer» which of the following equations is not balanced.(1)caco_{3 →}cao + co_2 (2) NaNo_3→ NaNo_2+O_{

Discussion

2268.	Heating of iodine is a _______ change.
Answer» Heating of iodine is a _______ change.

Discussion

2269.	23. For the reaction P+Q----- R+2S, initially the concentration of Pi is equal to Q but at equilibrium the concentration of R will be twice of that of P then the equilibrium constant of the reaction
Answer» 23. For the reaction P+Q----- R+2S, initially the concentration of Pi is equal to Q but at equilibrium the concentration of R will be twice of that of P then the equilibrium constant of the reaction

Discussion

2270.	Which of these can be used to distinguish acids from bases?
Answer» Which of these can be used to distinguish acids from bases?

Discussion

2271.	If a drop of ammonia solution is added to turmeric paste, the colour of paste will change to:
Answer» If a drop of ammonia solution is added to turmeric paste, the colour of paste will change to:

Discussion

2272.	Strongest base isA) Naoh b) nh3 c) h20 d)hf
Answer» Strongest base is A) Naoh b) nh3 c) h20 d)hf

Discussion

2273.	How the ionic equation for a chemical reaction is written?
Answer» How the ionic equation for a chemical reaction is written?

Discussion

2274.	by H2O electrolysis what volume we find and its mechanism.
Answer» by H2O electrolysis what volume we find and its mechanism.

Discussion

2275.	What are Intermolecular hydrogen bonding and Intramolecular hydrogen bonding responsible for? Their effects on properties of the compound?
Answer» What are Intermolecular hydrogen bonding and Intramolecular hydrogen bonding responsible for? Their effects on properties of the compound?

Discussion

2276.	Question 8Which of the following reacts with cold water vigorously?(a) carbon(b) sodium(c) magnesium(d) sulphur
Answer» Question 8 Which of the following reacts with cold water vigorously? (a) carbon (b) sodium (c) magnesium (d) sulphur

Discussion

2277.	What is the equivalent weight of B(OH)3 .
Answer» What is the equivalent weight of B(OH)3 .

Discussion

2278.	Give reasons why-sepration of mixtures E.g. iron from a mixture of iron & sulphur is a physical change, but heating a mixture of iron & sulphur is considered a chemical change.
Answer» Give reasons why-sepration of mixtures E.g. iron from a mixture of iron & sulphur is a physical change, but heating a mixture of iron & sulphur is considered a chemical change.

Discussion

2279.	Name three plants from which indicators can be prepared.
Answer» Name three plants from which indicators can be prepared.

Discussion

2280.	Which type f matter is purified by crystallisation method?
Answer» Which type f matter is purified by crystallisation method?

Discussion

2281.	33. Which of the following complex has a shapedifferent from others?(a) \lbrack Zn (NH3)4\rbrack2+ (b)(c) \lbrack Cu (CN)41(\lbrack Ni (CO)4\rbrack(d) \lbrack Cu (NH3 412
Answer» 33. Which of the following complex has a shapedifferent from others?(a) \lbrack Zn (NH3)4\rbrack2+ (b)(c) \lbrack Cu (CN)41(\lbrack Ni (CO)4\rbrack(d) \lbrack Cu (NH3 412

Discussion

2282.	what is histocompatibility complex and its function?
Answer» what is histocompatibility complex and its function?

Discussion

2283.	The grasslands of prairies were the home of native American Indians, which are more popularly known as
Answer» The grasslands of prairies were the home of native American Indians, which are more popularly known as

Discussion

2284.	Calcium oxide+water→Calcium hydroxide+heat The chemical equation for the given word equation is:
Answer» Calcium oxide+water $\to$ Calcium hydroxide+heat The chemical equation for the given word equation is:

Discussion

2285.	On the basis of composition, how is matter classified? [1 MARK]
Answer» On the basis of composition, how is matter classified? [1 MARK]

Discussion

2286.	The rate constant of a first-order reaction is 10–3 min–1 at 300 K. The temperature coefficient of the reaction is 2. What is the rate constant of the reaction at 350 K approximately?
Answer» The rate constant of a first-order reaction is $10^{- 3} {min}^{- 1}$ at $300 K$ . The temperature coefficient of the reaction is $2$ . What is the rate constant of the reaction at $350 K$ approximately?

Discussion

2287.	Silkworms are reared under suitable conditions of temperature and humidity to obtain silk threads from their ___.
Answer» Silkworms are reared under suitable conditions of temperature and humidity to obtain silk threads from their ___.

Discussion

2288.	What is the valency of Oxygen in general?
Answer» What is the valency of Oxygen in general?

Discussion

2289.	38. The average rate (in atm per min) of following reaction 2HI = H_2+ I_2, when initial pressure of HI is reduced from 0.4atm to 0.2 atm in 10 minutes, is
Answer» 38. The average rate (in atm per min) of following reaction 2HI = H_2+ I_2, when initial pressure of HI is reduced from 0.4atm to 0.2 atm in 10 minutes, is

Discussion

2290.	Why are cotton clothes more suitable to wear than synthetic clothes during the summer season?
Answer» Why are cotton clothes more suitable to wear than synthetic clothes during the summer season?

Discussion

2291.	How many valence electrons are present in free radical?
Answer» How many valence electrons are present in free radical?

Discussion

2292.	Complete the missing components/variables given as x and y in the following reaction. Pb(NO3)2(aq)+2KI(aq)→PbI2(x)+2KNO3(y)
Answer» Complete the missing components/variables given as x and y in the following reaction. ${Pb(NO}_{3})_{2} (aq) + 2 KI(aq) \to {PbI}_{2} (x) + 2 {KNO}_{3} (y)$

Discussion

2293.	82.How much O2 gas will be collected at the anode at 300 K temperature and 1 bar pressure if 2.5 ampere current is passed for one hour in electrolysis of aqueous solution of Na2SO4
Answer» 82.How much O2 gas will be collected at the anode at 300 K temperature and 1 bar pressure if 2.5 ampere current is passed for one hour in electrolysis of aqueous solution of Na2SO4

Discussion

2294.	Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size. Rock, Clay, Sand, Gravel, Silt
Answer» Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size. Rock, Clay, Sand, Gravel, Silt

Discussion

2295.	Citric acid is present in which of the following fruit(s)?
Answer» Citric acid is present in which of the following fruit(s)?

Discussion

2296.	Is distilled water acidic, basic or neutral? How would you verify it?
Answer» Is distilled water acidic, basic or neutral? How would you verify it?

Discussion

2297.	Explain the principle behind chromatography.
Answer» Explain the principle behind chromatography.

Discussion

2298.	The image given below shows ___ movements.
Answer» The image given below shows ___ movements.

2298.

The image given below shows ___ movements.

Answer»

The image given below shows ___ movements.

Discussion

2299.	What is the difference between the burning of a candle and the burning of a fuel like coal? [2 MARKS]
Answer» What is the difference between the burning of a candle and the burning of a fuel like coal? [2 MARKS]

Discussion

2300.	Explain neutralization reaction with the help of an example? If sulphuric acid is added to lime water, what changes can be observed in the reaction mixture? Why? [5 MARKS]
Answer» Explain neutralization reaction with the help of an example? If sulphuric acid is added to lime water, what changes can be observed in the reaction mixture? Why? [5 MARKS]

Discussion

Explore topic-wise InterviewSolutions in .

Question 1.Differentiate: Slow and Fast change Natural and man-made change

Species is

24. In Victor Meyer's Method, 0.2 gm of an organic compound displaced 56 mL of air at S.T.P. The molecular weight of compound is

E∘ for the cell Zn|Zn2+(aq)||Cu2+(aq)|Cu) is 1.10 v at 25∘. The equilibrium constant for the reactionZn+Cu2+(aq)→Cu+Zn2+(aq) is of the order of:

Which of the following is a homogeneous mixture?

For the equation in acidic medium: S2O2−3(aq)+Cr2O2−7(aq)→S4O2−6(aq)+Cr3+(aq)The coefficient of H+ in the balanced reaction by oxidation number method will be

66 Two elements X and Y (atomic mass of X= 75, Y= 16) combines to give a compound having 76% of X. The formula of the compound is

Muthodi is a conservation area where tourists are allowed in safaris to observe wildlife. Tribal communities are also allowed to use the forest for their requirements though they are not allowed to hunt. What type of conservation area is Muthodi?

What is an ionic bond? Explain with an example.

When we add water to milk, they form a homogeneous mixture because:

The substance which will change the colour of red cabbage solution to dark green is

2. The concentreatiln of sucrose solution which is isotonic with 0.02 M solution of Na2SO4 T 30 degree celcius

When Eno fruit salt is mixed with water, bubbles are formed. What type of change is it? Explain [5 MARKS]

The emf of the cell, Pt|H2(1 atm),|H+ (0.1 M, 40 mL)||Ag+(0.8 mM)|Ag is 0.9 V. Calculate the emf when 60 mL of 0.05 M NaOH is added to the anodic compartment.Given: 2.303RTF=0.06,log2=0.3

A compound has vapour density 29. On warming with a solution of iodine in alkali, it gives a yellow precipitate, the compound is---- 1. CH3CH2CHO 2. CH3COCH3 3. CH3CHOHCH3 4. CH2CH2CH2Br

Which of the following compounds is not colored yellow?

which of the following equations is not balanced.(1)caco_{3 →}cao + co_2 (2) NaNo_3→ NaNo_2+O_{

Heating of iodine is a _______ change.

23. For the reaction P+Q----- R+2S, initially the concentration of Pi is equal to Q but at equilibrium the concentration of R will be twice of that of P then the equilibrium constant of the reaction

Which of these can be used to distinguish acids from bases?

If a drop of ammonia solution is added to turmeric paste, the colour of paste will change to:

Strongest base isA) Naoh b) nh3 c) h20 d)hf

How the ionic equation for a chemical reaction is written?

by H2O electrolysis what volume we find and its mechanism.

What are Intermolecular hydrogen bonding and Intramolecular hydrogen bonding responsible for? Their effects on properties of the compound?

Question 8Which of the following reacts with cold water vigorously?(a) carbon(b) sodium(c) magnesium(d) sulphur

What is the equivalent weight of B(OH)3 .

Give reasons why-sepration of mixtures E.g. iron from a mixture of iron &amp; sulphur is a physical change, but heating a mixture of iron &amp; sulphur is considered a chemical change.

Name three plants from which indicators can be prepared.

Which type f matter is purified by crystallisation method?

33. Which of the following complex has a shapedifferent from others?(a) \lbrack Zn (NH3)4\rbrack2+ (b)(c) \lbrack Cu (CN)41(\lbrack Ni (CO)4\rbrack(d) \lbrack Cu (NH3 412

what is histocompatibility complex and its function?

The grasslands of prairies were the home of native American Indians, which are more popularly known as

Calcium oxide+water→Calcium hydroxide+heat The chemical equation for the given word equation is:

On the basis of composition, how is matter classified? [1 MARK]

The rate constant of a first-order reaction is 10–3 min–1 at 300 K. The temperature coefficient of the reaction is 2. What is the rate constant of the reaction at 350 K approximately?

Silkworms are reared under suitable conditions of temperature and humidity to obtain silk threads from their ___.

What is the valency of Oxygen in general?

38. The average rate (in atm per min) of following reaction 2HI = H_2+ I_2, when initial pressure of HI is reduced from 0.4atm to 0.2 atm in 10 minutes, is

Why are cotton clothes more suitable to wear than synthetic clothes during the summer season?

How many valence electrons are present in free radical?

Complete the missing components/variables given as x and y in the following reaction. Pb(NO3)2(aq)+2KI(aq)→PbI2(x)+2KNO3(y)

82.How much O2 gas will be collected at the anode at 300 K temperature and 1 bar pressure if 2.5 ampere current is passed for one hour in electrolysis of aqueous solution of Na2SO4

Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size. Rock, Clay, Sand, Gravel, Silt

Citric acid is present in which of the following fruit(s)?

Is distilled water acidic, basic or neutral? How would you verify it?

Explain the principle behind chromatography.

The image given below shows ___ movements.

What is the difference between the burning of a candle and the burning of a fuel like coal? [2 MARKS]

Explain neutralization reaction with the help of an example? If sulphuric acid is added to lime water, what changes can be observed in the reaction mixture? Why? [5 MARKS]

Give reasons why-sepration of mixtures E.g. iron from a mixture of iron & sulphur is a physical change, but heating a mixture of iron & sulphur is considered a chemical change.