5083 + Interview Questions in Chemistry Page 28 InterviewSolution

1351.	Lightest element known to man??
Answer» Lightest element known to man??

Discussion

1352.	ntOn the basis of the given below information prove that Fe3+ is more stable than Fe2+n ntFe2+/Fe = -0.4 V; Fe3+/Fe2+ = +0.8 Vn
Answer» ntOn the basis of the given below information prove that Fe3+ is more stable than Fe2+n ntFe2+/Fe = -0.4 V; Fe3+/Fe2+ = +0.8 Vn

Discussion

1353.	(a) Name two products that are obtained from the destructive distillation of coal. (b) What is syngas and how is it prepared?
Answer» (a) Name two products that are obtained from the destructive distillation of coal. (b) What is syngas and how is it prepared?

Discussion

1354.	Which of the following statement is correct?
Answer» Which of the following statement is correct?

Discussion

1355.	29. In cathode rays discharge tube experiment while descovering electron what was the behind that J.J Thomson did'nt notice canal rays in discharge tube having positive charge
Answer» 29. In cathode rays discharge tube experiment while descovering electron what was the behind that J.J Thomson did'nt notice canal rays in discharge tube having positive charge

Discussion

1356.	The valency of sodium is _____.
Answer» The valency of sodium is _____.

1356.

The valency of sodium is _____.

Answer»

The valency of sodium is _____.

Discussion

1357.	explain the preparation of detergents .
Answer» explain the preparation of detergents .

Discussion

1358.	___are organisms which break up dead plant and animal remains into organic and inorganic matter.
Answer» ___are organisms which break up dead plant and animal remains into organic and inorganic matter.

Discussion

1359.	Which is used to remove the organic waste from the sludge?
Answer» Which is used to remove the organic waste from the sludge?

Discussion

1360.	Which of the following acid in our stomach helps us to digest food?
Answer» Which of the following acid in our stomach helps us to digest food?

Discussion

1361.	What is natural fibre, and how is it different from synthetic fibre? Give examples of natural and synthetic fibres.
Answer» What is natural fibre, and how is it different from synthetic fibre? Give examples of natural and synthetic fibres.

Discussion

1362.	Aristotlethen moved forward with the concept and told class that all the changes thatare not reversible change are irreversible change. So which of the followingstatements define irreversible change?
Answer» Aristotle then moved forward with the concept and told class that all the changes that are not reversible change are irreversible change. So which of the following statements define irreversible change?

Discussion

1363.	S8+bOH−→cS2−+sS2O2−3+H2O. Find the value of c.
Answer» $S_{8} + b O H^{-} \to c S^{2 -} + s S_{2} O_{3}^{2 -} + H_{2} O$ . Find the value of c.

Discussion

1364.	given the s†an dard enthalpy of formation of CO (-110kj/mol) and CO2 (-349KJ/MOL) the heat of combustion when one mole of graphite burns is 1.-110 2.-284 3.-394 4.-504
Answer» given the s†an dard enthalpy of formation of CO (-110kj/mol) and CO2 (-349KJ/MOL) the heat of combustion when one mole of graphite burns is 1.-110 2.-284 3.-394 4.-504

Discussion

1365.	CaCO3 does not dissolve in water, but in the presence of CO2 it dissolves to form ′X′ ′X′ is
Answer» $C a C O_{3}$ does not dissolve in water, but in the presence of $C O_{2}$ it dissolves to form $^{'} X^{'}$ $^{'} X^{'}$ is

1365.

CaCO3 does not dissolve in water, but in the presence of CO2 it dissolves to form ′X′ ′X′ is

Answer»

$C a C O_{3}$ does not dissolve in water, but in the presence of $C O_{2}$ it dissolves to form $^{'} X^{'}$

$^{'} X^{'}$ is

Discussion

1366.	Which of these can be used as an indicator?
Answer» Which of these can be used as an indicator?

Discussion

1367.	2.16 g of a metal oxide on strong heating produced 255 mL of oxygen at STP (taking 1 atm as standard pressure) and the residue obtained was a pure metal. Calculate the equivalent weight of the metal.
Answer» $2.16 g$ of a metal oxide on strong heating produced $255 mL$ of oxygen at STP (taking 1 atm as standard pressure) and the residue obtained was a pure metal. Calculate the equivalent weight of the metal.

Discussion

1368.	What are decomposers?What do they do in the forest?
Answer» What are decomposers?What do they do in the forest?

Discussion

1369.	Molar conductivity of a weak electrolyte AB at 0.01 M concentration was found to be 10 S cm2 mol–1. What will be the molar conductivity of this electrolyte when concentration is 0.005 M? The molar conductivity at infinite dilution is 400 S cm2 mol–1. Assume the degree of dissociation is negligible as compared to unity
Answer» Molar conductivity of a weak electrolyte AB at 0.01 M concentration was found to be 10 S cm2 mol–1. What will be the molar conductivity of this electrolyte when concentration is 0.005 M? The molar conductivity at infinite dilution is 400 S cm2 mol–1. Assume the degree of dissociation is negligible as compared to unity

Discussion

1370.	Chassez l'intrus.1. le poulet, la pomme, le veau, le bœuf.2. la pomme, la poire, l'orange, la pomme de terre.3. le dîner, le goûter, le petit déjeuner, le thé.4. l'eau minérale, le café, le thé, le fromage.5. le chou-fleur, le champignon, l'épinard, le citron.
Answer» Chassez l'intrus. 1. le poulet, la pomme, le veau, le bœuf. 2. la pomme, la poire, l'orange, la pomme de terre. 3. le dîner, le goûter, le petit déjeuner, le thé. 4. l'eau minérale, le café, le thé, le fromage. 5. le chou-fleur, le champignon, l'épinard, le citron.

Discussion

1371.	A wire in the shape of frustum, have circular cross-sections of radii r1=2.5 cm and r2=4 cm. The resistivity of the material of the wire is ρ=2×10−3 Ωm. Calculate the resistance of the wire, if the length of the wire is 10 cm.
Answer» A wire in the shape of frustum, have circular cross-sections of radii $r_{1} = 2.5 cm$ and $r_{2} = 4 cm$ . The resistivity of the material of the wire is $ρ = 2 \times 10^{- 3} Ω m$ . Calculate the resistance of the wire, if the length of the wire is $10 cm$ .

Discussion

1372.	Boiling purifies water because:
Answer» Boiling purifies water because:

Discussion

1373.	When washing soda is added to remove the permanent hardness of water it converts sulphates and chlorides into which of the following insoluble compound-
Answer» When washing soda is added to remove the permanent hardness of water it converts sulphates and chlorides into which of the following insoluble compound-

Discussion

1374.	Which of the following molecules is made up of different kinds of atoms?
Answer» Which of the following molecules is made up of different kinds of atoms?

Discussion

1375.	Illustrate with the help of examples that particles of matter are continuously moving?
Answer» Illustrate with the help of examples that particles of matter are continuously moving?

Discussion

1376.	An atom X has 2 electrons greater than its nearest noble gas. What would be the formula of its:a) chlorideb) oxide
Answer» An atom X has 2 electrons greater than its nearest noble gas. What would be the formula of its: a) chloride b) oxide

Discussion

1377.	The reaction between an acid and a base to form a salt is called ______.
Answer» The reaction between an acid and a base to form a salt is called ______.

Discussion

1378.	Percolation rate of water in sand is:
Answer» Percolation rate of water in sand is:

Discussion

1379.	A mirror is an example of___ object.
Answer» A mirror is an example of___ object.

Discussion

1380.	what is what is acidic and basic nature?
Answer» what is what is acidic and basic nature?

Discussion

1381.	In which of these states of matter is the effect of pressure highest?
Answer» In which of these states of matter is the effect of pressure highest?

Discussion

1382.	Neat labeled diagram of pollen grain
Answer» Neat labeled diagram of pollen grain

Discussion

1383.	Which one is more basic in nature ? And why
Answer» Which one is more basic in nature ? And why

Discussion

1384.	Which of the following change can be reversed?
Answer» Which of the following change can be reversed?

Discussion

1385.	Ionic Bond of HNO3
Answer» Ionic Bond of HNO3

Discussion

1386.	The temperature at which liquid starts boiling at atmospheric pressure is known as :
Answer» The temperature at which liquid starts boiling at atmospheric pressure is known as :

Discussion

1387.	A Drop of colourless liquid was placed on blue litmus paper. The litmus paper turned red. The liquid could be :(1) dilute hydrochloric acid(2) dilute sodium hydroxide solution(3) distilled water(4) sodium bicarbonate solution
Answer» A Drop of colourless liquid was placed on blue litmus paper. The litmus paper turned red. The liquid could be : (1) dilute hydrochloric acid (2) dilute sodium hydroxide solution (3) distilled water (4) sodium bicarbonate solution

Discussion

1388.	what is full form of BEC and meaning ?
Answer» what is full form of BEC and meaning ?

Discussion

1389.	Question 26A solution of potassium chloride when mixed with silver nitrate solution, forms an insoluble white substance. Write the chemical reaction involved and also mention the type of the chemical reaction.
Answer» Question 26 A solution of potassium chloride when mixed with silver nitrate solution, forms an insoluble white substance. Write the chemical reaction involved and also mention the type of the chemical reaction.

Discussion

1390.	What is the chemical formula for baking soda
Answer» What is the chemical formula for baking soda

Discussion

1391.	Which amongst the following is not matter?a. Brickb. Penc. TimeGive reason.
Answer» Which amongst the following is not matter? a. Brick b. Pen c. Time Give reason.

Discussion

1392.	Question 3(d) Fill in the blanks in the following statements: Changes in which only ___ properties of a substance change are called physical changes.
Answer» Question 3(d) Fill in the blanks in the following statements: Changes in which only ___ properties of a substance change are called physical changes.

Discussion

1393.	Litmus is naturally extracted from _____.
Answer» Litmus is naturally extracted from _____.

Discussion

1394.	the negative charge in a water molecule isOptions: 1.6 × 10^–20 C 1.6 × 10^20 C1.6 × 10^–18 C1.6 × 10^18 C
Answer» the negative charge in a water molecule is Options: 1.6 × 10^–20 C 1.6 × 10^20 C 1.6 × 10^–18 C 1.6 × 10^18 C

Discussion

1395.	What is a double displacement reaction?
Answer» What is a double displacement reaction?

Discussion

1396.	it is observed 1000 water droplets ,each ofdiameter 10 to the power -6 cm (10-6) .combine to form one large spherical water drop.surface tension of water is 7.2 10-2 N/m ,then calculate the ratio between the excess pressures of the one small drop and the large drop so formed.
Answer» it is observed 1000 water droplets ,each ofdiameter 10 to the power -6 cm (10-6) .combine to form one large spherical water drop.surface tension of water is 7.2 10-2 N/m ,then calculate the ratio between the excess pressures of the one small drop and the large drop so formed.

Discussion

1397.	VO4^3- is acidic or basic??
Answer» VO4^3- is acidic or basic??

Discussion

1398.	Sheela cooked rice in a rice cooker. What kind of change took place? (i) irreversible change (ii) Slow change (iii) natural change
Answer» Sheela cooked rice in a rice cooker. What kind of change took place? (i) irreversible change (ii) Slow change (iii) natural change

Discussion

1399.	Q. As we know acidic food digests our enamel, then does lemon ,which is acidic, dissolves our enamel ?
Answer» Q. As we know acidic food digests our enamel, then does lemon ,which is acidic, dissolves our enamel ?

Discussion

1400.	WHAT IS MEANING OF AROW SIGN "=>"
Answer» WHAT IS MEANING OF AROW SIGN "=>"

Discussion

Explore topic-wise InterviewSolutions in .

Lightest element known to man??

ntOn the basis of the given below information prove that Fe3+ is more stable than Fe2+n ntFe2+/Fe = -0.4 V; Fe3+/Fe2+ = +0.8 Vn

(a) Name two products that are obtained from the destructive distillation of coal. (b) What is syngas and how is it prepared?

Which of the following statement is correct?

29. In cathode rays discharge tube experiment while descovering electron what was the behind that J.J Thomson did'nt notice canal rays in discharge tube having positive charge

The valency of sodium is _____. ​​

explain the preparation of detergents .

___are organisms which break up dead plant and animal remains into organic and inorganic matter.

Which is used to remove the organic waste from the sludge?

Which of the following acid in our stomach helps us to digest food?

What is natural fibre, and how is it different from synthetic fibre? Give examples of natural and synthetic fibres.

Aristotlethen moved forward with the concept and told class that all the changes thatare not reversible change are irreversible change. So which of the followingstatements define irreversible change?

S8+bOH−→cS2−+sS2O2−3+H2O. Find the value of c.

given the s†an dard enthalpy of formation of CO (-110kj/mol) and CO2 (-349KJ/MOL) the heat of combustion when one mole of graphite burns is 1.-110 2.-284 3.-394 4.-504

CaCO3 does not dissolve in water, but in the presence of CO2 it dissolves to form ′X′ ′X′ is

Which of these can be used as an indicator?

2.16 g of a metal oxide on strong heating produced 255 mL of oxygen at STP (taking 1 atm as standard pressure) and the residue obtained was a pure metal. Calculate the equivalent weight of the metal.

What are decomposers?What do they do in the forest?

Chassez l'intrus.1. le poulet, la pomme, le veau, le bœuf.2. la pomme, la poire, l'orange, la pomme de terre.3. le dîner, le goûter, le petit déjeuner, le thé.4. l'eau minérale, le café, le thé, le fromage.5. le chou-fleur, le champignon, l'épinard, le citron.

A wire in the shape of frustum, have circular cross-sections of radii r1=2.5 cm and r2=4 cm. The resistivity of the material of the wire is ρ=2×10−3 Ωm. Calculate the resistance of the wire, if the length of the wire is 10 cm.

Boiling purifies water because:

When washing soda is added to remove the permanent hardness of water it converts sulphates and chlorides into which of the following insoluble compound-

Which of the following molecules is made up of different kinds of atoms?

Illustrate with the help of examples that particles of matter are continuously moving?

An atom X has 2 electrons greater than its nearest noble gas. What would be the formula of its:a) chlorideb) oxide

The reaction between an acid and a base to form a salt is called ______.

Percolation rate of water in sand is:

A mirror is an example of___ object.

what is what is acidic and basic nature?

In which of these states of matter is the effect of pressure highest?

Neat labeled diagram of pollen grain

Which one is more basic in nature ? And why

Which of the following change can be reversed?

Ionic Bond of HNO3

The temperature at which liquid starts boiling at atmospheric pressure is known as :

A Drop of colourless liquid was placed on blue litmus paper. The litmus paper turned red. The liquid could be :(1) dilute hydrochloric acid(2) dilute sodium hydroxide solution(3) distilled water(4) sodium bicarbonate solution

what is full form of BEC and meaning ?

Question 26A solution of potassium chloride when mixed with silver nitrate solution, forms an insoluble white substance. Write the chemical reaction involved and also mention the type of the chemical reaction.

What is the chemical formula for baking soda

Which amongst the following is not matter?a. Brickb. Penc. TimeGive reason.

Question 3(d) Fill in the blanks in the following statements: Changes in which only ___ properties of a substance change are called physical changes.

Litmus is naturally extracted from _____.

the negative charge in a water molecule isOptions: 1.6 × 10^–20 C 1.6 × 10^20 C1.6 × 10^–18 C1.6 × 10^18 C

What is a double displacement reaction?

it is observed 1000 water droplets ,each ofdiameter 10 to the power -6 cm (10-6) .combine to form one large spherical water drop.surface tension of water is 7.2 10-2 N/m ,then calculate the ratio between the excess pressures of the one small drop and the large drop so formed.

VO4^3- is acidic or basic??

Sheela cooked rice in a rice cooker. What kind of change took place? (i) irreversible change (ii) Slow change (iii) natural change

Q. As we know acidic food digests our enamel, then does lemon ,which is acidic, dissolves our enamel ?

WHAT IS MEANING OF AROW SIGN "=>"

The valency of sodium is _____.