15280 + Interview Questions in Chemistry Page 210 InterviewSolution

10451.	Which of the following is/are caused by ammonia ?
Answer» Which of the following is/are caused by ammonia ?

Discussion

10452.	Which of the following reaction will occur during the substitution reaction of methane with chlorine to form carbon tetrachloride?
Answer» Which of the following reaction will occur during the substitution reaction of methane with chlorine to form carbon tetrachloride?

Discussion

10453.	Question 06. Calcium phosphate is present in tooth enamel. Its nature is (a) basic (b) acidic (c) neutral (d) amphoteric
Answer» Question 06. Calcium phosphate is present in tooth enamel. Its nature is (a) basic (b) acidic (c) neutral (d) amphoteric

Discussion

10454.	Complete: (a)Na−...........→Na+(b)N +...........→N3−(c)Cl+e−→...........(d)Mg −...........→Mg2+(e)M+HCl→MCl2+...........(f)Mg+H2SO4→...........+...........
Answer» Complete: $(a) N a^{-} . . . . . . . . . . . \to N a^{+} (b) N + . . . . . . . . . . . \to N^{3 -} (c) C l + e^{-} \to . . . . . . . . . . . (d) M g - . . . . . . . . . . . \to M g^{2 +} (e) M + H C l \to M C l_{2} + . . . . . . . . . . . (f) M g + H_{2} S O_{4} \to . . . . . . . . . . . + . . . . . . . . . . .$

10454.

Complete: (a)Na−...........→Na+(b)N +...........→N3−(c)Cl+e−→...........(d)Mg −...........→Mg2+(e)M+HCl→MCl2+...........(f)Mg+H2SO4→...........+...........

Answer»

Complete:

$(a) N a^{-} . . . . . . . . . . . \to N a^{+} (b) N + . . . . . . . . . . . \to N^{3 -} (c) C l + e^{-} \to . . . . . . . . . . . (d) M g - . . . . . . . . . . . \to M g^{2 +} (e) M + H C l \to M C l_{2} + . . . . . . . . . . . (f) M g + H_{2} S O_{4} \to . . . . . . . . . . . + . . . . . . . . . . .$

Discussion

10455.	What is the name of the chemical bond formed: (a) by the sharing of electrons between two atoms? (b) by the transfer of electrons form one atom to another?
Answer» What is the name of the chemical bond formed: (a) by the sharing of electrons between two atoms? (b) by the transfer of electrons form one atom to another?

Discussion

10456.	(a) what is the difference between displacement and double displacement reactions ? Write equations for these reactions. (b) What do you mean by a precipition reaction ? Explain giving and example.
Answer» (a) what is the difference between displacement and double displacement reactions ? Write equations for these reactions. (b) What do you mean by a precipition reaction ? Explain giving and example.

10456.

(a) what is the difference between displacement and double displacement reactions ? Write equations for these reactions. (b) What do you mean by a precipition reaction ? Explain giving and example.

Answer»

(a) what is the difference between displacement and double displacement reactions ? Write equations for these reactions.

(b) What do you mean by a precipition reaction ? Explain giving and example.

Discussion

10457.	Explain first law of thermodynamics.
Answer» Explain first law of thermodynamics.

Discussion

10458.	At the same temperature, which of the following gas will be adsorbed in higher proportion?
Answer» At the same temperature, which of the following gas will be adsorbed in higher proportion?

Discussion

10459.	Alkenes are also called _______.
Answer» Alkenes are also called _______.

Discussion

10460.	Statement - I: Mg2+ and Al3+ are isoelectronic but ionic radius Al3+ is less than that of Mg2+. Statement - II: The effective nuclear charge on the outer-shell electrons in Al3+ is more than that in Mg2+
Answer» Statement - I: $M g^{2 +} a n d A l^{3 +}$ are isoelectronic but ionic radius $A l^{3 +}$ is less than that of $M g^{2 +}$ . Statement - II: The effective nuclear charge on the outer-shell electrons in $A l^{3 +}$ is more than that in $M g^{2 +}$

Discussion

10461.	What are harmful effects of drinking alcohol? [5 MARKS]
Answer» What are harmful effects of drinking alcohol? [5 MARKS]

Discussion

10462.	Show with diagrams how alcohols differ structrually from alkanes. [2 MARKS]
Answer» Show with diagrams how alcohols differ structrually from alkanes. [2 MARKS]

Discussion

10463.	Write down the steps involved in the manufacturing of baking soda.
Answer» Write down the steps involved in the manufacturing of baking soda.

Discussion

10464.	Elements with configuration 2, 8, 2 and 2, 7 are placed in Modern Periodic Table write the position in Modern Periodic table and identify their valencies and write the formula of compound formed by their combination
Answer» Elements with configuration 2, 8, 2 and 2, 7 are placed in Modern Periodic Table write the position in Modern Periodic table and identify their valencies and write the formula of compound formed by their combination

Discussion

10465.	What happens when nitric acid is added to calcium carbonate?
Answer» What happens when nitric acid is added to calcium carbonate?

Discussion

10466.	Give any two ways in which biodegradable substances would affect the environment.
Answer» Give any two ways in which biodegradable substances would affect the environment.

Discussion

10467.	A hydride of nitrogen contains 87.5 per cent by mass fo nitrogen. Determine the empirical formula of this compound.
Answer» A hydride of nitrogen contains 87.5 per cent by mass fo nitrogen. Determine the empirical formula of this compound.

Discussion

10468.	Which of the following is an example of synthesis reaction?
Answer» Which of the following is an example of synthesis reaction?

Discussion

10469.	A forest ecosystem has a lot of green plants has some foxes, lions and rabbits in it. (a) Write a food chain comprising all the four organisms mentioned above. (b) Name (i) one herbivore, and (ii) two carnivores, in this food chain. (c) Name the link which is a predator as well as a prey. (d) Name (i) second trophic level, and (ii) third trophic level. (e) Which link of this food chain can feed on the second trophic level as well as the third trophic level, independently? (f) If the sun provides 1000 J of energy to the plants, then how much energy will be transferred to fox through the food chain.
Answer» A forest ecosystem has a lot of green plants has some foxes, lions and rabbits in it. (a) Write a food chain comprising all the four organisms mentioned above. (b) Name (i) one herbivore, and (ii) two carnivores, in this food chain. (c) Name the link which is a predator as well as a prey. (d) Name (i) second trophic level, and (ii) third trophic level. (e) Which link of this food chain can feed on the second trophic level as well as the third trophic level, independently? (f) If the sun provides 1000 J of energy to the plants, then how much energy will be transferred to fox through the food chain.

10469.

A forest ecosystem has a lot of green plants has some foxes, lions and rabbits in it. (a) Write a food chain comprising all the four organisms mentioned above. (b) Name (i) one herbivore, and (ii) two carnivores, in this food chain. (c) Name the link which is a predator as well as a prey. (d) Name (i) second trophic level, and (ii) third trophic level. (e) Which link of this food chain can feed on the second trophic level as well as the third trophic level, independently? (f) If the sun provides 1000 J of energy to the plants, then how much energy will be transferred to fox through the food chain.

Answer»

A forest ecosystem has a lot of green plants has some foxes, lions and rabbits in it.

(a) Write a food chain comprising all the four organisms mentioned above.
(b) Name (i) one herbivore, and (ii) two carnivores, in this food chain.
(c) Name the link which is a predator as well as a prey.
(d) Name (i) second trophic level, and (ii) third trophic level.

(e) Which link of this food chain can feed on the second trophic level as well as the third trophic level, independently?

(f) If the sun provides 1000 J of energy to the plants, then how much energy will be transferred to fox through the food chain.

Discussion

10470.	Consider the following elements : Ca, Cl, Na, I, Li, Ba, Sr, K, Br Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
Answer» Consider the following elements : Ca, Cl, Na, I, Li, Ba, Sr, K, Br Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.

10470.

Consider the following elements : Ca, Cl, Na, I, Li, Ba, Sr, K, Br Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.

Answer»

Consider the following elements :

Ca, Cl, Na, I, Li, Ba, Sr, K, Br

Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.

Discussion

10471.	All the elements in the group have
Answer» All the elements in the group have

Discussion

10472.	How do we come to know that a chemical reaction has taken place
Answer» How do we come to know that a chemical reaction has taken place

Discussion

10473.	An aqueous solution of a mixture of two inorganic salts, when treated with dilute HCl, gave a precipitate (P) and a filtrate (Q). The precipitate (P) was found to dissolve in hot water. The filtrate (Q) remained unchanged when treated with H2S in a dilute mineral acid medium. However, it gave a precipitate (R) with H2S in an ammoniacal medium. The precipitate R gave a coloured solution (S) when treated with H2O2 in an aqueous NaOH medium. The coloured solution S contains
Answer» An aqueous solution of a mixture of two inorganic salts, when treated with dilute HCl, gave a precipitate (P) and a filtrate (Q). The precipitate (P) was found to dissolve in hot water. The filtrate (Q) remained unchanged when treated with $H_{2} S$ in a dilute mineral acid medium. However, it gave a precipitate (R) with $H_{2} S$ in an ammoniacal medium. The precipitate R gave a coloured solution (S) when treated with $H_{2} O_{2}$ in an aqueous NaOH medium. The coloured solution S contains

Discussion

10474.	What were the limitations of Dobereiner's classifications?
Answer» What were the limitations of Dobereiner's classifications?

Discussion

10475.	What is the formula to calculate the pH of H+ and pH of OH-
Answer» What is the formula to calculate the pH of H+ and pH of OH-

Discussion

10476.	Explain the meaning of hydration and hydrogen bonds and differentia between them
Answer» Explain the meaning of hydration and hydrogen bonds and differentia between them

Discussion

10477.	Figure shows an experimental set up for the laboratory preparation of pungent smelling gas. The gas is alkaline in nature. How will you find that the jar is full of gas?
Answer» Figure shows an experimental set up for the laboratory preparation of pungent smelling gas. The gas is alkaline in nature. How will you find that the jar is full of gas?

10477.

Figure shows an experimental set up for the laboratory preparation of pungent smelling gas. The gas is alkaline in nature. How will you find that the jar is full of gas?

Answer»

Figure shows an experimental set up for the laboratory preparation of pungent smelling gas. The gas is alkaline in nature.

How will you find that the jar is full of gas?

Discussion

10478.	Name the functional groups present in the following compounds: [5 MARKS] 1. CH3−CH2−CH2−OH 2. CH3−CH2−CH2−COOH 3. CH3−CH2−CHO 4. CH3−CO−CH2−CH3 5. CH3−CH2−CO-OH
Answer» Name the functional groups present in the following compounds: [5 MARKS] 1. ${CH}_{3} - {CH}_{2} - {CH}_{2} - OH$ 2. ${CH}_{3} - {CH}_{2} - {CH}_{2} - COOH$ 3. ${CH}_{3} - {CH}_{2} - CHO$ 4. ${CH}_{3} - CO - {CH}_{2} - {CH}_{3}$ 5. ${CH}_{3} - {CH}_{2} - CO-OH$

10478.

Name the functional groups present in the following compounds: [5 MARKS] 1. CH3−CH2−CH2−OH 2. CH3−CH2−CH2−COOH 3. CH3−CH2−CHO 4. CH3−CO−CH2−CH3 5. CH3−CH2−CO-OH

Answer»

Name the functional groups present in the following compounds: [5 MARKS]

1. ${CH}_{3} - {CH}_{2} - {CH}_{2} - OH$
2. ${CH}_{3} - {CH}_{2} - {CH}_{2} - COOH$
3. ${CH}_{3} - {CH}_{2} - CHO$
4. ${CH}_{3} - CO - {CH}_{2} - {CH}_{3}$
5. ${CH}_{3} - {CH}_{2} - CO-OH$

Discussion

10479.	The order of penetration power within a principal quantum number is:
Answer» The order of penetration power within a principal quantum number is:

Discussion

10480.	How many moles of hydrogen atoms are present in one mole of water (H2O)?2
Answer» How many moles of hydrogen atoms are present in one mole of water ( $H_{2} O$ )? 2

Discussion

10481.	The unwanted and valueless part for which the concentration of ore done is _________.
Answer» The unwanted and valueless part for which the concentration of ore done is _________.

Discussion

10482.	What is precipitation? In what ways it is necessary to us?
Answer» What is precipitation? In what ways it is necessary to us?

Discussion

10483.	How are metals refined by the electrolytic process? Describe the electrolytic refining of copper with the help of a neat labelled diagram.
Answer» How are metals refined by the electrolytic process? Describe the electrolytic refining of copper with the help of a neat labelled diagram.

Discussion

10484.	Metal oxide + water → ______.
Answer» Metal oxide + water $\to$ ______.

Discussion

10485.	Noble gases are considered to be inert because they:
Answer» Noble gases are considered to be inert because they:

Discussion

10486.	Zinc sulphate reacts with ammonium hydroxide, the products formed are:
Answer» Zinc sulphate reacts with ammonium hydroxide, the products formed are:

Discussion

10487.	What is fused alumina used in electrolytic reduction?
Answer» What is fused alumina used in electrolytic reduction?

Discussion

10488.	Why"Ores are minerals but minerals are not ores"?
Answer» Why"Ores are minerals but minerals are not ores"?

Discussion

10489.	The hybridized orbitals have:
Answer» The hybridized orbitals have:

Discussion

10490.	Which of the following contains a coordinate covalent bond ?
Answer» Which of the following contains a coordinate covalent bond ?

10490.

Which of the following contains a coordinate covalent bond ?

Answer»

Which of the following contains a coordinate covalent bond ?

Discussion

10491.	The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is : (a) KCl (b) K2SO4 (c) K2CO3 (d) KNO3
Answer» The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is : (a) $K C l$ (b) $K_{2} S O_{4}$ (c) $K_{2} C O_{3}$ (d) $K N O_{3}$

10491.

The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is : (a) KCl (b) K2SO4 (c) K2CO3 (d) KNO3

Answer»

The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is :

(a) $K C l$

(b) $K_{2} S O_{4}$

(c) $K_{2} C O_{3}$

(d) $K N O_{3}$

Discussion

10492.	Calculate the volume of CO2 evolved at NTP when 20g of CaCO3 is heated strongly.
Answer» Calculate the volume of $C O_{2}$ evolved at NTP when 20g of $C a C O_{3}$ is heated strongly.

Discussion

10493.	The ratio fo rates of diffusion of SO2,O2 and CH4 is
Answer» The ratio fo rates of diffusion of $S O_{2}, O_{2} a n d C H_{4}$ is

Discussion

10494.	What happens when vinegar reacts with sodium carbonate
Answer» What happens when vinegar reacts with sodium carbonate

Discussion

10495.	How is photolythic decomposition used in photography, also write the reaction involved?
Answer» How is photolythic decomposition used in photography, also write the reaction involved?

Discussion

10496.	With reference to changes in the properties of elements on moving left to right across a Period of the Periodic Table, select the correct answer. The electronegativity:
Answer» With reference to changes in the properties of elements on moving left to right across a Period of the Periodic Table, select the correct answer. The electronegativity:

10496.

With reference to changes in the properties of elements on moving left to right across a Period of the Periodic Table, select the correct answer. The electronegativity:

Answer»

With reference to changes in the properties of elements on moving left to right across a Period of the Periodic Table, select the correct answer.

The electronegativity:

Discussion

10497.	K2CrO7+KOH→H2O+K2CrO4 Is the above equation correct? How to balance a chemical equation?
Answer» $K_{2} C r O_{7} + K O H \to H_{2} O + K_{2} C r O_{4}$ Is the above equation correct? How to balance a chemical equation?

Discussion

10498.	Why is respiration considered as an exothermic process?
Answer» Why is respiration considered as an exothermic process?

Discussion

10499.	Compare esterification and saponification reaction.
Answer» Compare esterification and saponification reaction.

Discussion

10500.	According to the IUPAC recommendations, the number of groups in the long form of the periodic table is:
Answer» According to the IUPAC recommendations, the number of groups in the long form of the periodic table is:

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following is/are caused by ammonia ?

Which of the following reaction will occur during the substitution reaction of methane with chlorine to form carbon tetrachloride?

Question 06. Calcium phosphate is present in tooth enamel. Its nature is (a) basic (b) acidic (c) neutral (d) amphoteric

Complete: (a)Na−...........→Na+(b)N +...........→N3−(c)Cl+e−→...........(d)Mg −...........→Mg2+(e)M+HCl→MCl2+...........(f)Mg+H2SO4→...........+...........

What is the name of the chemical bond formed: (a) by the sharing of electrons between two atoms? (b) by the transfer of electrons form one atom to another?

(a) what is the difference between displacement and double displacement reactions ? Write equations for these reactions. (b) What do you mean by a precipition reaction ? Explain giving and example.

Explain first law of thermodynamics.

At the same temperature, which of the following gas will be adsorbed in higher proportion?

Alkenes are also called _______.

Statement - I: Mg2+ and Al3+ are isoelectronic but ionic radius Al3+ is less than that of Mg2+. Statement - II: The effective nuclear charge on the outer-shell electrons in Al3+ is more than that in Mg2+

What are harmful effects of drinking alcohol? [5 MARKS]

Show with diagrams how alcohols differ structrually from alkanes. [2 MARKS]

Write down the steps involved in the manufacturing of baking soda.

Elements with configuration 2, 8, 2 and 2, 7 are placed in Modern Periodic Table write the position in Modern Periodic table and identify their valencies and write the formula of compound formed by their combination

What happens when nitric acid is added to calcium carbonate?

Give any two ways in which biodegradable substances would affect the environment.

A hydride of nitrogen contains 87.5 per cent by mass fo nitrogen. Determine the empirical formula of this compound.

Which of the following is an example of synthesis reaction?

Consider the following elements : Ca, Cl, Na, I, Li, Ba, Sr, K, Br Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.

All the elements in the group have

How do we come to know that a chemical reaction has taken place

What were the limitations of Dobereiner's classifications?

What is the formula to calculate the pH of H+ and pH of OH-

Explain the meaning of hydration and hydrogen bonds and differentia between them

Figure shows an experimental set up for the laboratory preparation of pungent smelling gas. The gas is alkaline in nature. How will you find that the jar is full of gas?

Name the functional groups present in the following compounds: [5 MARKS] 1. CH3−CH2−CH2−OH 2. CH3−CH2−CH2−COOH 3. CH3−CH2−CHO 4. CH3−CO−CH2−CH3 5. CH3−CH2−CO-OH

The order of penetration power within a principal quantum number is:

How many moles of hydrogen atoms are present in one mole of water (H2O)?2

The unwanted and valueless part for which the concentration of ore done is _________.

What is precipitation? In what ways it is necessary to us?

How are metals refined by the electrolytic process? Describe the electrolytic refining of copper with the help of a neat labelled diagram.

Metal oxide + water → ______.

Noble gases are considered to be inert because they:

Zinc sulphate reacts with ammonium hydroxide, the products formed are:

What is fused alumina used in electrolytic reduction?

Why"Ores are minerals but minerals are not ores"?

The hybridized orbitals have:

Which of the following contains a coordinate covalent bond ?

The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is : (a) KCl (b) K2SO4 (c) K2CO3 (d) KNO3

Calculate the volume of CO2 evolved at NTP when 20g of CaCO3 is heated strongly.

The ratio fo rates of diffusion of SO2,O2 and CH4 is

What happens when vinegar reacts with sodium carbonate

How is photolythic decomposition used in photography, also write the reaction involved?

With reference to changes in the properties of elements on moving left to right across a Period of the Periodic Table, select the correct answer. The electronegativity:

K2CrO7+KOH→H2O+K2CrO4 Is the above equation correct? How to balance a chemical equation?

Why is respiration considered as an exothermic process?

Compare esterification and saponification reaction.

According to the IUPAC recommendations, the number of groups in the long form of the periodic table is: