8881 + Interview Questions in Chemistry in Class 10 Page 93 InterviewSolution

4601.	It is found that with an increase in temperature by 40%, thevolume decreases by 20% withchange in pressure. Find thepercentage change in pressure.
Answer» `40%` DECREASE `60%` decrease `75%` INCREASE `80%` increase Answer :C

Discussion

4602.	What happens when methane is burnt in an insufficient supply of oxygen
Answer» Solution :Because combustion of methane will be incomplete, which will cause pollution of atmosphere DUE to PRODUCTION of CO and CARBON particles.

Discussion

4603.	What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series?
Answer» SOLUTION :The appliances connected in series need currents of widely different values to operate properly. In a series circuit, if one component FAILS, the circuits is broken and none of the components WORK. But in a parallel circuit current divides through the electrical gadgets. This is helpful PARTICULARLY when each gadget has different RESISTANCE and requires different current to operate properly.

Discussion

4604.	It has been found that 221.4J is needed to heat 30g of enthanol from 15^(@)C " to " 18^(@)C. Calcuate specific heat capacity,
Answer» SOLUTION :`2.46 JG^(-1) ""^(@)C^(-1)`

Discussion

4605.	It has been found that 221.4J is needed to heat 30g of enthanol from 15^(@)C " to " 18^(@)C. Calcuate molar heat capacity of ethanol.
Answer» SOLUTION :`113.2 J MOL^(-1) ""^(@)C^(-1)`

Discussion

4606.	Isotopesof oxygen: ""_(8) O^(17 ),""_(8)O^(18):: Isotopesof carbon:_______.
Answer» SOLUTION :`""_(6 ) C^(13), ""_(6 )C^(14)`

Discussion

4607.	Isotopes of an element do not have
Answer» same number of ELECTRON same physical PROPERTIES same CHEMICAL properties none of these Answer :B

Discussion

4608.	Isotopeshavesame_______ butdifferent______.
Answer» SOLUTION :ATOMICNUMBER, MASSNUMBER

Discussion

4609.	State true or false: Isotopes have similar chemical properties.
Answer» SOLUTION :False. ISOTOPES are ATOMSOF the same ELEMENT having same atomic numberbut DIFFERENT atomic masses .

Discussion

4610.	Isotopeshave
Answer» Samephysicalpropertiesanddifferenetchemicalproperties Samechemicalpropertiesanddifferentphysicalproperties Samephysicaland CHEMICAL PROPERTIES Differentphysicaland CHEMICALPROPERTIES ANSWER :B

Discussion

4611.	Isotopes differ in
Answer» no. of electrons no. of PROTONS no. of neutrons first towards NEGATIVE plate and then to WARDS positive plate Answer :C

Discussion

4612.	Isotopes differ in ________.
Answer» SOLUTION :ATOMICMASS or NUMBEROF NEUTRONS

Discussion

4613.	Isotopes are the atoms of the same element may not be similar in all respects.
Answer» ANSWER :1

Discussion

4614.	Isotopes
Answer» Solution :Different ATOMS of the same element having same ATOMIC number but different atomic mass number are CALLED Isotopes.

Discussion

4615.	Isotones are the atoms of different elements with same number of neutrons.
Answer» ANSWER :1

Discussion

4616.	Isomers have same molecular formula but different _____ formula.
Answer» SOLUTION :STRUCTURAL

Discussion

4617.	Isomerism is possible if a hydrocarbon has ________or more carbon atoms.
Answer» 3 4 `2` 1 Answer :B

Discussion

4618.	Isoelectronic molecules and ions have identical………………….
Answer» SOLUTION :BOND ORDER

Discussion

4619.	Isobars are the atoms of the different element with same atomic number and different mass numbers.
Answer» Solution :CORRECT STATEMENT: ISOBARS are the atoms of the different element with same MASS number but different atomic number.

Discussion

4620.	Isobars differ in ______.
Answer» SOLUTION :Atomicnumberor numberofprotonsand ELECTRONS

Discussion

4621.	Is water pollution caused by the careless disposal of sewage ?
Answer» ANSWER :YES

Discussion

4622.	……………is used in the manufacturing of soap and……………. Is used in white washing buildings.
Answer» SOLUTION :SODIUM HYDROXIDE,CALCIUM hydroxide

Discussion

4623.	…………………..is used as a preservative for biological specimens and…………………is used as a presentative in food and fruit juices.
Answer» SOLUTION :ETHANOL, ETHANOIC ACID

Discussion

4624.	………is used as a medicine for stomach disorder.
Answer» SODIUM hydroxide Ammonium hydroxide Magnesium hydroxide Calcium hydroxide Answer :A::D

Discussion

4625.	…………………..is used as a flavouring agent and preservative.
Answer» SOLUTION :ETHANOIC ACID

Discussion

4626.	………………..is uesd as an anti-freeze in automobile radiators.
Answer» SOLUTION :ETHANOL

Discussion

4627.	Is toothpaste acidic or alkaline ?
Answer» SOLUTION :TOOTHPASTE is ALKALINE

Discussion

4628.	Is there any similarity in these three compounds mentioned above ?
Answer» Solution :Similarity observed in above three COMPOUNDS are as follows : (1) Difference in molecular formulae of these compounds is `CH_(2)`. (2) Difference in molecular masses of these compounds is 14 U. (3) In the nomenclature of these compounds, a COMMON suffix -ol is written. (4) These compounds are represented by the general formula `C_(n)H_(2n+1)OH`. (5) Chemical reactions of these compounds are identical. (6) All the three compounds are alcohols.

Discussion

4629.	Is the sulphur dioxide acidic or basic?
Answer» SOLUTION :It is an ACIDIC.

Discussion

4630.	Is the product formed on burning sulphur acidic or basic ?
Answer» SOLUTION :It is ACIDIC.

Discussion

4631.	Is thepresence of oxygen necessary during the preparation of bleaching powder ?
Answer» ANSWER :No

Discussion

4632.	Is theoversuse of coal a major cause of its depletion ?
Answer» ANSWER :YES

Discussion

4633.	________isthe majorphenomenonin a decompositionreaction .
Answer» SOLUTION :BREAKINGOF BONDS

Discussion

4634.	Is the magnesium oxide acidic or basic?
Answer» SOLUTION :MAGNESIUM OXIDE is BASIC in NATURE.

Discussion

4635.	is the iron is exposed
Answer» Solution :When iron is exposed to moist air, it forms a layer of brown hydrated Ferric oxide on its SURFACE. This compound is KNOWN as rust. `4Fe + 3O_(2) + xH_(2)O to 2Fe_(2)O_(3).xH_(2)O`

Discussion

4636.	Is the following reaction a displacement agents ? H_(2)S + CI_(2) to 2HCI +S
Answer» ANSWER :YES

Discussion

4637.	Is the following equation correct and balanced ? Mg + O to MgO
Answer» ANSWER :NO

Discussion

4638.	Is sodium less reactive than potassium ?
Answer» SOLUTION :RUBBER

Discussion

4639.	_______is produced by the action of chlorine on dry slaked lime.
Answer» SOLUTION :BLEACHING POWDER.

Discussion

4640.	Is pure zinc deposited on the anode during the electrolytic refining of zinc ?
Answer» ANSWER :No

Discussion

4641.	………………….is present in many fruits.
Answer» SOLUTION :ACETIC ACID

Discussion

4642.	…………….is one twelfth of the mass of C - 12 atom, an isotope of carbon which contains …………….protons and ……………neutrons.
Answer» SOLUTION :ATOMIC MASS UNIT, 6, 6

Discussion

4643.	What are saturated and unsaturated hydrocarbons ?
Answer»

Discussion

4644.	Is it true that soaps do not work well with hard water ?
Answer» ANSWER :YES

Discussion

4645.	Is it safe to stir 1 M AgNO3 solution with copper spoon ? E_(Ag^(+)//Ag)^(theta)=+0.80V,E_(Cu^(2+)//Cu)^(theta)=+0.34V.
Answer» ANSWER :No

Discussion

4646.	Is it possible to have an element with atomic number 2.5?
Answer» SOLUTION :No, because the ATOMIC NUMBERS of elements are ALWAYS in whole numbers.

Discussion

4647.	Is it possible to have an element with atomic number 1.5 placed between hydrogen and helium ?
Answer» Solution :(1) The atomic number of an element is always definite and WHOLE number. (2) In the modern periodic table, elements are ARRANGED in increasing order of their atomic NUMBERS. (3) The atomic number cannot be represented in fraction number. THUS, an element with atomic number 1.5 cannot be placed between hydrogen and helium.

Discussion

4648.	Is it possible to have an element with atomic number 1.5 placed between hydrogen and helium?
Answer» SOLUTION :No, it is not POSSIBLE to have an element with atonic NUMBER 1.5. This is because the ATOMIC number of an element is the number of protons or electrons in an atom of the element. Thus, atomic number has to always be a whole number and it can never be 1.5

Discussion

4649.	Is it correct to say that in a metal. The metal ions are immersed in a sea of electrons ?
Answer» ANSWER :No

Discussion

4650.	Is ethene a saturated compound ?
Answer» ANSWER :No

Discussion

Explore topic-wise InterviewSolutions in .

It is found that with an increase in temperature by 40%, thevolume decreases by 20% withchange in pressure. Find thepercentage change in pressure.

What happens when methane is burnt in an insufficient supply of oxygen

What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series?

It has been found that 221.4J is needed to heat 30g of enthanol from 15^(@)C " to " 18^(@)C. Calcuate specific heat capacity,

It has been found that 221.4J is needed to heat 30g of enthanol from 15^(@)C " to " 18^(@)C. Calcuate molar heat capacity of ethanol.

Isotopesof oxygen: ""_(8) O^(17 ),""_(8)O^(18):: Isotopesof carbon:_______.

Isotopes of an element do not have

Isotopeshavesame_______ butdifferent______.

State true or false: Isotopes have similar chemical properties.

Isotopeshave

Isotopes differ in

Isotopes differ in ________.

Isotopes are the atoms of the same element may not be similar in all respects.

Isotopes

Isotones are the atoms of different elements with same number of neutrons.

Isomers have same molecular formula but different _____ formula.

Isomerism is possible if a hydrocarbon has ________or more carbon atoms.

Isoelectronic molecules and ions have identical………………….

Isobars are the atoms of the different element with same atomic number and different mass numbers.

Isobars differ in ______.

Is water pollution caused by the careless disposal of sewage ?

……………is used in the manufacturing of soap and……………. Is used in white washing buildings.

…………………..is used as a preservative for biological specimens and…………………is used as a presentative in food and fruit juices.

………is used as a medicine for stomach disorder.

…………………..is used as a flavouring agent and preservative.

………………..is uesd as an anti-freeze in automobile radiators.

Is toothpaste acidic or alkaline ?

Is there any similarity in these three compounds mentioned above ?

Is the sulphur dioxide acidic or basic?

Is the product formed on burning sulphur acidic or basic ?

Is thepresence of oxygen necessary during the preparation of bleaching powder ?

Is theoversuse of coal a major cause of its depletion ?

________isthe majorphenomenonin a decompositionreaction .

Is the magnesium oxide acidic or basic?

is the iron is exposed

Is the following reaction a displacement agents ? H_(2)S + CI_(2) to 2HCI +S

Is the following equation correct and balanced ? Mg + O to MgO

Is sodium less reactive than potassium ?

_______is produced by the action of chlorine on dry slaked lime.

Is pure zinc deposited on the anode during the electrolytic refining of zinc ?

………………….is present in many fruits.

…………….is one twelfth of the mass of C - 12 atom, an isotope of carbon which contains …………….protons and ……………neutrons.

What are saturated and unsaturated hydrocarbons ?

Is it true that soaps do not work well with hard water ?

Is it safe to stir 1 M AgNO3 solution with copper spoon ? E_(Ag^(+)//Ag)^(theta)=+0.80V,E_(Cu^(2+)//Cu)^(theta)=+0.34V.

Is it possible to have an element with atomic number 2.5?

Is it possible to have an element with atomic number 1.5 placed between hydrogen and helium ?

Is it possible to have an element with atomic number 1.5 placed between hydrogen and helium?

Is it correct to say that in a metal. The metal ions are immersed in a sea of electrons ?

Is ethene a saturated compound ?

Isotopeshavesame_ butdifferent.