8881 + Interview Questions in Chemistry in Class 10 Page 161 InterviewSolution

8001.	Although metals form basic oxides, which of the following metals form an amphoteric oxide ?
Answer» Na Ca Al CU SOLUTION :Aluminium oxide REACTS both ACIDS and alkalis

Discussion

8002.	alpha particle is emitted by 92^(X^(238)) during radioactivity.The new specie Y should be:
Answer» `90^(Y^(234))` `90^(Y^(238))` `92^(Y^(234))` `94^(Y^(234))` ANSWER :A

Discussion

8003.	Along the period , from left to righ , the atomic radius of the elements______________
Answer» SOLUTION :DECREASES

Discussion

8004.	Along the groups , from the top to bottom, the atomic radius _________.
Answer» SOLUTION :INCREASES

Discussion

8005.	Along the group , atomic radius ……..
Answer» DECREASES INCREASES DECREASE then increases no change Answer :B

Discussion

8006.	Almost 90% of all known compounds are organic in nature. Give reason.
Answer» SOLUTION :Because of TETRAVALENCY and CATENATING POWER of C-atom

Discussion

8007.	All types of hydrocarbons undergo______giving CO_2, H_2Oand heat. (chlorination, combustion, hydrogenation)
Answer» SOLUTION :CUMBUSTION

Discussion

8008.	All the s - block elements of the periodic table and placed in the groups
Answer» 17 and 18 15 and 16 1 and 2 18 Answer :C

Discussion

8009.	All the members of group I are metals. Li and Na react with water rapidly whereas K, Rb, and Cs react vigourously. Write the electronic configuration of Li and K and find their valency from the given information. Infer the change in reactivity in a group given atomic numbers of Li and K are 3 and 19 respectively.
Answer» Solution :Electronic configuration: `LI (3) to 2, I and K (19) to 2, 8, 8, 1`. VALENCY of both is I since they belong to group one. Since chemical reactivity INCREASES as we move down a group, K, Rb, and Cs which LIE below Li and Na in group I are more reactive.

Discussion

8010.	All the known elements could not be classified into triads.
Answer» ANSWER :T

Discussion

8011.	If water sample are taken from sea, rivers or lake, they will be found to contain hydrogen and oxygen in the approximate ratio of 1 : 8. This indicates the law of :
Answer» CONSERVATION of mass constant proportions multiple proportions gaseous VOLUMES ANSWER :B

Discussion

8012.	All salts are
Answer» STRONG ELECTROLYTES WEAK electrolytes NON electrolytes EITHER weak or strong Solution :either weak or strong

Discussion

8013.	All photo decomposition reaction are………..reactions.
Answer» SOLUTION :ENDOTHERMIC

Discussion

8014.	All photodecompositionreactionare _________reactions.
Answer» SOLUTION :ENDOTHERMIC

Discussion

8015.	All ores are minerals, but all minerals are not ores.Why?
Answer» Solution :(i)The elements or compounds of the METALS which OCCUR in nature in the earth.s crust are called minerals whereas ore is a MINERAL from which the METAL is profitably extracted.(ii) For example, aluminum exists in the two mineral forms, that is clay and bauxite.But aluminum is mainly extracted from bauxite which contain 70% aluminum oxide.So, bauxite is an ore of aluminum whereas clay is not ore. (iii) So, all ores are minerals but all minerals need not be ores.

Discussion

8016.	All ores are minerals, but all minerals cannot be called as ores.
Answer» SOLUTION :N/A

Discussion

8017.	All ombination reactions are……reactions.
Answer» COMBINATION reaction Exothermic Endothermic neutralisation Answer :C

Discussion

8018.	All of the following have a standard heat of formation value of zero at 25^(@)C and 1.0 atm except:
Answer» `N_(2)(g)` FE(s) NE(g) H(g) ANSWER :D

Discussion

8019.	All noble gases are ……………….. Molecules.
Answer» diatomic triatomic MONO ATOMIC poly atomic Solution :mono atomic

Discussion

8020.	All metals react with water with the same activity. (TRUE / FALSE)
Answer» ANSWER :F

Discussion

8021.	All metals are solids are room temperature .
Answer» Solution :Correct STATEMENT : Metalslike mercury and GALLIUM are liquidsat room TEMPERATURE.

Discussion

8022.	All members of each homologous series contain different elements and different functional groups.
Answer» Solution :All MEMBERS of each HOMOLOGOUS series CONTAIN same ELEMENTS and same functional groups.

Discussion

8023.	'All matter is composed of very small particles called anu', was first of all suggested by
Answer» JOHN Dalton J.J. Thomson KANADA WILLIAM J.Crooke Solution :Kanada

Discussion

8024.	All living organisms are made of…………………atoms.
Answer» PHOSPHOROUS sodium CARBON sulphur ANSWER :C

Discussion

8025.	All living organisms are made of carbon atoms. This means that, carbon atoms form the building blocks of living organisms. Justify this statement by giving physical nature of carbon and its compounds.
Answer» Solution :Physical nature of carbon and its compounds. Carbon has the ability to form covalent BONDS with other atoms of carbon giving rise to a large number of molecules through self linking property which is called catenation. Carbon combines with oxygen, hydrogen, nitrogen SULPHUR, chlorine and many other elements to form various STABLE compounds. The stability of carbon compounds is due to the small size of carbon which enables the nucleus to hold on to the shared pair of electrons strongly. Carbon compounds show ISOMERISM, the PHENOMENON by which two or more compounds have same molecular formula but different structural formula with difference in properties. Carbon compounds have low boiling and low melting points because of their covalent nature. Carbon compounds are easily combustible.

Discussion

8026.	All Lewis bases are Bronsted bases. But all Lewis acids are not Bronsted acids'. Comment on the statement
Answer» Solution :A Lewis base is an ELECTRON PAIR DONOR. A molecule that has EXCESS

Discussion

8027.	All isomers of a compound have the same properties.
Answer» ANSWER :F

Discussion

8028.	All hydrocarbons undergo- giving CO_2, H_2Oand produce heat.
Answer» SOLUTION :COMBUSTION

Discussion

8029.	All halides of sodium are ionic. Fluorides and chlorides of magnesium are ionic. But among halides of aluminum, only AlF_(3) is ionic. How do you account for this variation?
Answer» SOLUTION :Polarizing power of the cation depends on its size and the charge present on it. The smaller the size and the higher the charge of the cation, the greater the polarizing power. AMONG `Na^(+)`, `Mg^(+2)` and `Al^(+3)`, `Al^(+3)` has least ionic size and the charge present on it is MAXIMUM. Hence, polarizing power of `Al^(+3)` is maximum. Among the halides `AlF_(3)` is ionic, but other halides of aluminium are covalent. Polarizing power of MAGNESIUM is less than aluminium. Hence, CHLORIDE and fluoride of magnesium are ionic. But `Na^(+)` has the least polarizing power. Hence, all the haldies of sodium are ionic.

Discussion

8030.	All detergents produce more lather with hard water than with soft water.
Answer» ANSWER :F

Discussion

8031.	All combustion reaction are endothermic reactions
Answer» SOLUTION :FALSE CORRECT STATEMENT:All COMBUSTION REACTIONS are exothermic reaction.

Discussion

8032.	All ……… cannot be calledas ores but all ……… are minerals
Answer» SOLUTION : MINERALS, ORES

Discussion

8033.	Alkynes are unsaturated hydrocarbons. Justify this statement giving two reasons.
Answer» SOLUTION :(a) ALKYNES involve triple bond `(C-=C)` (b) Alkynes give red precipitate with AMMONIACAL solution of copper (I) CHLORIDE.

Discussion

8034.	Alkynes are the most reactive due to presence of the…………………
Answer» SOLUTION :TRIPLE BOND

Discussion

8035.	Alkynes are _____hydrocarbons.(saturated/unsaturated)
Answer» SOLUTION :UNSATURATED

Discussion

8036.	Alkenes or alkynes are more reactive than their corresponding alkane.
Answer» ANSWER :1

Discussion

8037.	Alkenes have the general formula………………….and they were previously called………………….
Answer» Solution :`C_(N)H_(2n)`, OLEFINS

Discussion

8038.	Alkenes are ______hydrocarbons. (saturated/unsaturated)
Answer» SOLUTION :UNSATURATED

Discussion

8039.	Alkanes generally burn with a clean flame . Why?
Answer» SOLUTION :ALKANES have higher percentage of hydrogen and HENCE burn completely.

Discussion

8040.	Alkanes are ______ hydrocarbons. (saturated, unsaturated)
Answer» SOLUTION :SATURATED

Discussion

8041.	Alkanes are _____ hydrocarbons.
Answer» SOLUTION :SATURATED

Discussion

8042.	Alkaline KMnO_(4) and acidified K_(2)Cr_(2)O_(7) are :
Answer» Catalysts Reducing agents Oxidising agents None of these Answer :C

Discussion

8043.	Alkaline earth metals have valency 2. This meansthat their position in the Modem Periodic tableis in __________
Answer» GROUP 2 Group 16 PERIOD 2 d-block SOLUTION : Group 2

Discussion

8044.	Alkalies turn methyl orange
Answer» pink yellow red colourless Answer :C

Discussion

8045.	Alkali metlas have
Answer» HIGH MELTING and boiling point low melting and boiling point high melting and low boiling point low melting and high boiling point ANSWER :B

Discussion

8046.	Alkali metals are placed in Group 1.
Answer» Solution :(i)The group number INDICATES the number of valence electrons PRESENT in the outermost shell of an atom of an ELEMENT. (II) All alkali metalls have one electron in their outermost shell. Hence, they are placed in Group 1.

Discussion

8047.	Alkali metals are
Answer» bad conductors of HEAT and electricity good conductors of heat and electricity good conductors of heat but bad conductors of electricity semi CONDUCTOR of heat and electricity ANSWER :B

Discussion

8048.	Alkali metals and Alkaline earth metals
Answer» SOLUTION :

Discussion

8049.	Alkali metals act as strong reducing agents by underrgoing reduction.
Answer» ANSWER :1

Discussion

8050.	Aliphatic hydrocarbons are classified as ____ alkenes and alkynes. (alkanes, arenes)
Answer» SOLUTION :ALKANES

Discussion

Explore topic-wise InterviewSolutions in .

Although metals form basic oxides, which of the following metals form an amphoteric oxide ?

alpha particle is emitted by 92^(X^(238)) during radioactivity.The new specie Y should be:

Along the period , from left to righ , the atomic radius of the elements______________

Along the groups , from the top to bottom, the atomic radius _________.

Along the group , atomic radius ……..

Almost 90% of all known compounds are organic in nature. Give reason.

All types of hydrocarbons undergo______giving CO_2, H_2Oand heat. (chlorination, combustion, hydrogenation)

All the s - block elements of the periodic table and placed in the groups

All the known elements could not be classified into triads.

If water sample are taken from sea, rivers or lake, they will be found to contain hydrogen and oxygen in the approximate ratio of 1 : 8. This indicates the law of :

All salts are

All photo decomposition reaction are………..reactions.

All photodecompositionreactionare _________reactions.

All ores are minerals, but all minerals are not ores.Why?

All ores are minerals, but all minerals cannot be called as ores.

All ombination reactions are……reactions.

All of the following have a standard heat of formation value of zero at 25^(@)C and 1.0 atm except:

All noble gases are ……………….. Molecules.

All metals react with water with the same activity. (TRUE / FALSE)

All metals are solids are room temperature .

All members of each homologous series contain different elements and different functional groups.

'All matter is composed of very small particles called anu', was first of all suggested by

All living organisms are made of…………………atoms.

All living organisms are made of carbon atoms. This means that, carbon atoms form the building blocks of living organisms. Justify this statement by giving physical nature of carbon and its compounds.

All Lewis bases are Bronsted bases. But all Lewis acids are not Bronsted acids'. Comment on the statement

All isomers of a compound have the same properties.

All hydrocarbons undergo- giving CO_2, H_2Oand produce heat.

All halides of sodium are ionic. Fluorides and chlorides of magnesium are ionic. But among halides of aluminum, only AlF_(3) is ionic. How do you account for this variation?

All detergents produce more lather with hard water than with soft water.

All combustion reaction are endothermic reactions

All ……… cannot be calledas ores but all ……… are minerals

Alkynes are unsaturated hydrocarbons. Justify this statement giving two reasons.

Alkynes are the most reactive due to presence of the…………………

Alkynes are _____hydrocarbons.(saturated/unsaturated)

Alkenes or alkynes are more reactive than their corresponding alkane.

Alkenes have the general formula………………….and they were previously called………………….

Alkenes are ______hydrocarbons. (saturated/unsaturated)

Alkanes generally burn with a clean flame . Why?

Alkanes are ______ hydrocarbons. (saturated, unsaturated)

Alkanes are _____ hydrocarbons.

Alkaline KMnO_(4) and acidified K_(2)Cr_(2)O_(7) are :

Alkaline earth metals have valency 2. This meansthat their position in the Modem Periodic tableis in __________

Alkalies turn methyl orange

Alkali metlas have

Alkali metals are placed in Group 1.

Alkali metals are

Alkali metals and Alkaline earth metals

Alkali metals act as strong reducing agents by underrgoing reduction.

Aliphatic hydrocarbons are classified as ____ alkenes and alkynes. (alkanes, arenes)