10223 + Interview Questions in Chemistry Page 156 InterviewSolution

7751.	Which of the following are the reactants used for the production of baking soda?
Answer» Which of the following are the reactants used for the production of baking soda?

Discussion

7752.	In which of the following elements +1 oxidation state is more stable than +3 oxidation state?
Answer» In which of the following elements +1 oxidation state is more stable than +3 oxidation state?

Discussion

7753.	In the laboratory preparation of HCl, which solution is present in the thistle funnel?
Answer» In the laboratory preparation of HCl, which solution is present in the thistle funnel?

Discussion

7754.	Which type of bond is formed between two fluorine atoms to attain stability?
Answer» Which type of bond is formed between two fluorine atoms to attain stability?

Discussion

7755.	Negative catalyst of sulphuric acid
Answer» Negative catalyst of sulphuric acid

Discussion

7756.	5 ml of N HCl, 20 ml of N/2 H2SO4 and 30 ml of N/3 HNO3 are mixed together and volume made to one litre. The normality of the resulting solution is
Answer» 5 ml of N HCl, 20 ml of $N / 2 H_{2} S O_{4}$ and 30 ml of $N / 3 H N O_{3}$ are mixed together and volume made to one litre. The normality of the resulting solution is

Discussion

7757.	Why is copper a good metal to use for electrical wires?
Answer» Why is copper a good metal to use for electrical wires?

Discussion

7758.	The electrolysis of Ba(OH)2 yields at the anode.
Answer» The electrolysis of $B a (O H)_{2}$ yields at the anode.

Discussion

7759.	On passing carbon dioxide through limewater, the lime water turns milky. This is due to the formation of.
Answer» On passing carbon dioxide through limewater, the lime water turns milky. This is due to the formation of.

Discussion

7760.	A rod CD of thermal resistance 5.0 K/W is joined at the middle of an identical rod AB as shown in figure The ends A, B and D are maintained at 100∘C, 0 ∘ C and 25 ∘ C respectively. Find the heat current in CD.
Answer» A rod CD of thermal resistance 5.0 K/W is joined at the middle of an identical rod AB as shown in figure The ends A, B and D are maintained at 100 $^{\circ}$ C, 0 $^{\circ}$ C and 25 $^{\circ}$ C respectively. Find the heat current in CD.

7760.

A rod CD of thermal resistance 5.0 K/W is joined at the middle of an identical rod AB as shown in figure The ends A, B and D are maintained at 100∘C, 0 ∘ C and 25 ∘ C respectively. Find the heat current in CD.

Answer»

A rod CD of thermal resistance 5.0 K/W is joined at the middle of an identical rod AB as shown in figure The ends A, B and D are maintained at 100 $^{\circ}$ C, 0 $^{\circ}$ C and 25 $^{\circ}$ C respectively. Find the heat current in CD.

Discussion

7761.	The alloy of copper and zinc is known as__i__ and the alloy of carbon and iron is known as__ii__. Which alternative completes the above statement?
Answer» The alloy of copper and zinc is known as__i__ and the alloy of carbon and iron is known as__ii__. Which alternative completes the above statement?

7761.

The alloy of copper and zinc is known asi and the alloy of carbon and iron is known asii. Which alternative completes the above statement?

Answer»

The alloy of copper and zinc is known as__i__ and the alloy of carbon and iron is known as__ii__.

Which alternative completes the above statement?

Discussion

7762.	Differentiate between an isotope and an Isobar with examples. [2 MARKS]
Answer» Differentiate between an isotope and an Isobar with examples. [2 MARKS]

Discussion

7763.	Question 6 (a) Give two reasons to justify a. Water at room temperature is a liquid.
Answer» Question 6 (a) Give two reasons to justify a. Water at room temperature is a liquid.

Discussion

7764.	Question 10 (d) Classify the following into elements, compounds and mixtures. d. Silver
Answer» Question 10 (d) Classify the following into elements, compounds and mixtures. d. Silver

Discussion

7765.	STATEMENT 1: Elements cannot be broken down into simpler substances. STATEMENT 2: Mixtures are homogenous and heterogenous in nature. STATEMENT 3: Constituents of a compound can be separated by chemical means. STATEMENT 4: A mixture has a variable composition.
Answer» STATEMENT 1: Elements cannot be broken down into simpler substances. STATEMENT 2: Mixtures are homogenous and heterogenous in nature. STATEMENT 3: Constituents of a compound can be separated by chemical means. STATEMENT 4: A mixture has a variable composition.

7765.

STATEMENT 1: Elements cannot be broken down into simpler substances. STATEMENT 2: Mixtures are homogenous and heterogenous in nature. STATEMENT 3: Constituents of a compound can be separated by chemical means. STATEMENT 4: A mixture has a variable composition.

Answer»

STATEMENT 1: Elements cannot be broken down into simpler substances.

STATEMENT 2: Mixtures are homogenous and heterogenous in nature.

STATEMENT 3: Constituents of a compound can be separated by chemical means.

STATEMENT 4: A mixture has a variable composition.

Discussion

7766.	A solution contains 50g of common salt in 400g of water. Calculate the concentration in terms of mass by mass percentage of the solution.
Answer» A solution contains 50g of common salt in 400g of water. Calculate the concentration in terms of mass by mass percentage of the solution.

Discussion

7767.	Pick all the elements that belong to the halogen group.
Answer» Pick all the elements that belong to the halogen group.

Discussion

7768.	One of the following does not undergo sublimation. This one is : (a) camphor (b) dry ice (c) silica (d) iodine
Answer» One of the following does not undergo sublimation. This one is : (a) camphor (b) dry ice (c) silica (d) iodine

7768.

One of the following does not undergo sublimation. This one is : (a) camphor (b) dry ice (c) silica (d) iodine

Answer»

One of the following does not undergo sublimation. This one is :

(a) camphor (b) dry ice (c) silica (d) iodine

Discussion

7769.	___ is the technique is used to separate salt from sea water.
Answer» ___ is the technique is used to separate salt from sea water.

Discussion

7770.	Magnetic quantum number specifies:
Answer» Magnetic quantum number specifies:

Discussion

7771.	What is anthracene??what is the use of it???
Answer» What is anthracene??what is the use of it???

Discussion

7772.	The salt Zn(OH)2 is involved in the following two equilibria: Zn(OH)2(s)⇌Zn2+(aq)+2OH−(aq); Ksp=1.2×10−17 Zn(OH)2(s)+2OH−(aq)⇌[Zn(OH)4]2−(aq); Kc=0.2 Calculate the pH of the solution at which solubility is minimum.
Answer» The salt $Z n (O H)_{2}$ is involved in the following two equilibria: $Z n (O H)_{2} (s) ⇌ Z n^{2 +} (a q) + 2 O H^{-} (a q); K_{s p} = 1.2 \times 10^{- 17}$ $Z n (O H)_{2} (s) + 2 O H^{-} (a q) ⇌ [Z n (O H)_{4}]^{2 -} (a q); K_{c} = 0.2$ Calculate the pH of the solution at which solubility is minimum.

Discussion

7773.	Two elements having same number of protons and electrons but different number of neutrons
Answer» Two elements having same number of protons and electrons but different number of neutrons

Discussion

7774.	We were told that maximum number of electrons in the last shell is given by the formula 2n2 . But we were also told it at the maximum number of electrons the last I can accommodate is 8.But acoording to the formula 3rd shell can accomodate 18 electrons. Please explain
Answer» We were told that maximum number of electrons in the last shell is given by the formula 2n²_{^{. But we were also told it at the maximum number of electrons the last I can accommodate is 8.But acoording to the formula 3rd shell can accomodate 18 electrons. Please explain}}

Discussion

7775.	Calculate the mass of 6.022×1024atoms of carbon.
Answer» Calculate the mass of 6.022×10²⁴atoms of carbon.

Discussion

7776.	How is photolytic decomposition used in photography
Answer» How is photolytic decomposition used in photography

Discussion

7777.	What is difference netween the moe and molecule
Answer» What is difference netween the moe and molecule

Discussion

7778.	The mass of 6.022 × 1023 number of N2 molecules is:
Answer» The mass of 6.022 × 10²³ number of N₂ molecules is:

Discussion

7779.	Oxygen has 3 isotopes of atomic mass 16,17,18 respectively. Explain why they have same chemical properties, they are all electrically neutral.
Answer» Oxygen has 3 isotopes of atomic mass 16,17,18 respectively. Explain why they have same chemical properties, they are all electrically neutral.

Discussion

7780.	Which one of the following transition metal ion shows magnetic moment 5.92 BM
Answer» Which one of the following transition metal ion shows magnetic moment 5.92 BM

Discussion

7781.	A cylinder of cross section area A has two pistons of negligible mass separated by distance l loaded with a spring of negligible mass. An ideal gas of temperature T1 is in the cylinder where the springs are relaxed. When the gas is heated by some means, its temperature becomes T2 and the springs get compressed by l2 each. If P0 is atmospheric pressure and spring constant k=2P0Al, then the ratio of T2 and T1 is
Answer» A cylinder of cross section area $A$ has two pistons of negligible mass separated by distance $l$ loaded with a spring of negligible mass. An ideal gas of temperature $T_{1}$ is in the cylinder where the springs are relaxed. When the gas is heated by some means, its temperature becomes $T_{2}$ and the springs get compressed by $\frac{l}{2}$ each. If $P_{0}$ is atmospheric pressure and spring constant $k = \frac{2 P_{0} A}{l}$ , then the ratio of $T_{2} a n d T_{1}$ is

Discussion

7782.	During the evaporation of liquid –
Answer» During the evaporation of liquid –

Discussion

7783.	Why are electrons attached to the oil drops in Millikan experiment?
Answer» Why are electrons attached to the oil drops in Millikan experiment?

Discussion

7784.	Name one pair of substances whose mixture can be separated completely by distillation.
Answer» Name one pair of substances whose mixture can be separated completely by distillation.

Discussion

7785.	What is the abundance of oxygen in the universe?
Answer» What is the abundance of oxygen in the universe?

Discussion

7786.	Explain why a hot saturated solution of potassium nitrate forms crystals as it cools?
Answer» Explain why a hot saturated solution of potassium nitrate forms crystals as it cools?

Discussion

7787.	Give three factors which affect the solubility of a solid solute in a solvent.
Answer» Give three factors which affect the solubility of a solid solute in a solvent.

Discussion

7788.	What is all matter made up of? How did you arrive at this conclusion?
Answer» What is all matter made up of? How did you arrive at this conclusion?

Discussion

7789.	How does the rate of diffusion increase with increase in pressure?
Answer» How does the rate of diffusion increase with increase in pressure?

Discussion

7790.	Fill in the blank with the correct adjective. Green apples are _________ than the red ones.
Answer» Fill in the blank with the correct adjective. Green apples are _________ than the red ones.

7790.

Fill in the blank with the correct adjective. Green apples are _________ than the red ones.

Answer»

Fill in the blank with the correct adjective.

Green apples are _________ than the red ones.

Discussion

7791.	What is between mole and mopecule
Answer» What is between mole and mopecule

Discussion

7792.	Which of the following metal on reaction with cold water liberates hydrogen gas but does not float on water?
Answer» Which of the following metal on reaction with cold water liberates hydrogen gas but does not float on water?

Discussion

7793.	Gases gave large inter-particle spaces between the molecules, this accounts for the high _______ of gases.
Answer» Gases gave large inter-particle spaces between the molecules, this accounts for the high _______ of gases.

Discussion

7794.	How to balance equations?
Answer» How to balance equations?

Discussion

7795.	Can solids diffuse like liquids and gas?
Answer» Can solids diffuse like liquids and gas?

Discussion

7796.	The number of molecules per unit volume in a gas is _______ compared to solids and liquids.
Answer» The number of molecules per unit volume in a gas is _______ compared to solids and liquids.

Discussion

7797.	A colloid with a solid dispersed phase and liquid dispersing medium is called:
Answer» A colloid with a solid dispersed phase and liquid dispersing medium is called:

Discussion

7798.	Which order of three words match the three substances - Chlorine, Rock salt, Sodium chloride?
Answer» Which order of three words match the three substances - Chlorine, Rock salt, Sodium chloride?

Discussion

7799.	The longest chain in the following compound consists:
Answer» The longest chain in the following compound consists:

7799.

The longest chain in the following compound consists:

Answer»

The longest chain in the following compound consists:

Discussion

7800.	If we dissolve sugar in water the sugar molecules break and get into the spaces of water molecule but when a piece of iron is placed into water it donot dissolve , why sugar breaks into molecules and iron donot.
Answer» If we dissolve sugar in water the sugar molecules break and get into the spaces of water molecule but when a piece of iron is placed into water it donot dissolve , why sugar breaks into molecules and iron donot.

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following are the reactants used for the production of baking soda?

In which of the following elements +1 oxidation state is more stable than +3 oxidation state?

In the laboratory preparation of HCl, which solution is present in the thistle funnel?

Which type of bond is formed between two fluorine atoms to attain stability?

Negative catalyst of sulphuric acid

5 ml of N HCl, 20 ml of N/2 H2SO4 and 30 ml of N/3 HNO3 are mixed together and volume made to one litre. The normality of the resulting solution is

Why is copper a good metal to use for electrical wires?

The electrolysis of Ba(OH)2 yields at the anode.

On passing carbon dioxide through limewater, the lime water turns milky. This is due to the formation of.

A rod CD of thermal resistance 5.0 K/W is joined at the middle of an identical rod AB as shown in figure The ends A, B and D are maintained at 100∘C, 0 ∘ C and 25 ∘ C respectively. Find the heat current in CD.

The alloy of copper and zinc is known as__i__ and the alloy of carbon and iron is known as__ii__. Which alternative completes the above statement?

Differentiate between an isotope and an Isobar with examples. [2 MARKS]

Question 6 (a) Give two reasons to justify a. Water at room temperature is a liquid.

Question 10 (d) Classify the following into elements, compounds and mixtures. d. Silver

STATEMENT 1: Elements cannot be broken down into simpler substances. STATEMENT 2: Mixtures are homogenous and heterogenous in nature. STATEMENT 3: Constituents of a compound can be separated by chemical means. STATEMENT 4: A mixture has a variable composition.

A solution contains 50g of common salt in 400g of water. Calculate the concentration in terms of mass by mass percentage of the solution.

Pick all the elements that belong to the halogen group.

One of the following does not undergo sublimation. This one is : (a) camphor (b) dry ice (c) silica (d) iodine

___ is the technique is used to separate salt from sea water.

Magnetic quantum number specifies:

What is anthracene??what is the use of it???

The salt Zn(OH)2 is involved in the following two equilibria: Zn(OH)2(s)⇌Zn2+(aq)+2OH−(aq); Ksp=1.2×10−17 Zn(OH)2(s)+2OH−(aq)⇌[Zn(OH)4]2−(aq); Kc=0.2 Calculate the pH of the solution at which solubility is minimum.

Two elements having same number of protons and electrons but different number of neutrons

We were told that maximum number of electrons in the last shell is given by the formula 2n2 . But we were also told it at the maximum number of electrons the last I can accommodate is 8.But acoording to the formula 3rd shell can accomodate 18 electrons. Please explain

Calculate the mass of 6.022×1024atoms of carbon.

How is photolytic decomposition used in photography

What is difference netween the moe and molecule

The mass of 6.022 × 1023 number of N2 molecules is:

Oxygen has 3 isotopes of atomic mass 16,17,18 respectively. Explain why they have same chemical properties, they are all electrically neutral.

Which one of the following transition metal ion shows magnetic moment 5.92 BM

During the evaporation of liquid –

Why are electrons attached to the oil drops in Millikan experiment?

Name one pair of substances whose mixture can be separated completely by distillation.

What is the abundance of oxygen in the universe?

Explain why a hot saturated solution of potassium nitrate forms crystals as it cools?

Give three factors which affect the solubility of a solid solute in a solvent.

What is all matter made up of? How did you arrive at this conclusion?

How does the rate of diffusion increase with increase in pressure?

Fill in the blank with the correct adjective. Green apples are _________ than the red ones.

What is between mole and mopecule

Which of the following metal on reaction with cold water liberates hydrogen gas but does not float on water?

Gases gave large inter-particle spaces between the molecules, this accounts for the high _______ of gases.

How to balance equations?

Can solids diffuse like liquids and gas?

The number of molecules per unit volume in a gas is _______ compared to solids and liquids.

A colloid with a solid dispersed phase and liquid dispersing medium is called:

Which order of three words match the three substances - Chlorine, Rock salt, Sodium chloride?

The longest chain in the following compound consists:

If we dissolve sugar in water the sugar molecules break and get into the spaces of water molecule but when a piece of iron is placed into water it donot dissolve , why sugar breaks into molecules and iron donot.

The alloy of copper and zinc is known asi and the alloy of carbon and iron is known asii. Which alternative completes the above statement?