Welcome to the BYJU’S chemistry questions & answers forum! Here, all knowledge-seekers can access a huge archive of chemistry-related questions that have been answered in a concise, informative, and straightforward manner. Furthermore, users can utilize this platform to get their own chemistry questions answered by experts in the field. 

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If Masses Of All Molecules Of A Gas Are Halved And Their Speed Is Double Then The Ratio Of Initial And Final Pressure Will Be(A) 1:2.(B) 1:4.(C) 2:1.(D) 4:1.
Sol: The correct answer is (A) 1:2. Consider a box of length, l A molecule bounces elastically of the wall and to the other side and back....
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2 Moles Of Nitrogen Atoms At Ntp Occupy A Volume Of (A) 5.6 L.(B) 22.4 L.(C) 11.2 L.(D) 44.8 L.
The correct answer is (B) 22.4 L. 2N → N2 2 moles of N atoms form 1-mole N2 molecules We know that 1 mole of N2 molecules at NTP occupies...
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Burning Of Kerosene In A Lantern Is A Physical Or A Chemical Change. Give Reason.
The burning of kerosene in a lantern is a chemical change. When kerosene burns, it combines with atmospheric oxygen to form new products. Thus...
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What Are Essential Mineral And Non-Mineral Plants Elements?
Mineral elements are those elements that plant absorbs from the soil. The plant requires many essential elements for steady growth and...
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Which Of The Following Is The Conjugate Acid Of So42−? (A) H+. (B) SO42−. (C) HSO4−.(D) H2SO4.
The correct answer is (C) HSO4−. A conjugate acid, within the Brønsted–Lowry acid-base theory, is a species formed by the...
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Is Melting Of Ice A Reversible Change. (True /False)
The given statement is true. The melting of ice is a reversible change as the melted ice cubes may be refrozen. Explore more such questions and...
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When Hydrogen Sulphide Gas Is Passed Through A Blue Solution Of Copper Sulphate, A Black Precipitate Of Copper Sulphide Is Obtained And The Sulphuric Acid So Formed Remains In The Solution. The Reaction Is An Example Of :
This reaction is an example of a double displacement reaction. H2S + CuSO4 → CuS + H2SO4 Double displacement is a chemical reaction...
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Which Of The Following Nonmetal is Lustrous? (A) Iodine. (B) Oxygen. (C) Sulphur. (D) Nitrogen.
The correct answer is (A) Iodine. Lustre refers to shining metals. Non-metals such as sulphur, oxygen, nitrogen are non-lustrous. Iodine is a...
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Positive Economic Theory Deals With_____.
The positive economic theory deals with what are or how the economic problems faced by society are solved. Positive economics is based on data...
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The Octane Number Has Zero Value For (A) N-Octane. (B) N-Heptane. (C) Iso-Octane. (D) Tetraethyl Lead.
The correct answer is (B) n-heptane. N-heptane is defined as the zero point of the octane rating scale. The octane number is based on an...
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Which Of The Following Metals On Reacting With Sodium Hydroxide Solution Produce Hydrogen Gas? (A) Iron (Fe). (B) Zinc (Zn).(C) Aluminum (Al). (D) Both (B) and (C).
The correct answer is (D) Both (B) and (C). Both Zinc (Zn) and Aluminum (Al) produce hydrogen gas reacting with sodium hydroxide solution. Here...
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The Nucleus Of The Hydrogen Atom Is Called A (A) Proton.(B) Neutron.(C) Nucleons.(D) Electron.
The correct answer is (A) Proton. The nucleus of a hydrogen atom is called a proton as it has only one proton in Explore more such questions...
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As A Result Of Osmosis, The Volume Of The Concentrated Solution______. (A) Gradually Increases. (B) Gradually Decreases. (C) Suddenly Increases.(D) Remains Constant.
The correct answer is (A) Gradually Increases. As a result of osmosis, the volume of the concentrated solution gradually increases. Explore...
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What Is The IUPAC Name Of CH3CH2 – O – CH2CH2CH3?
The IUPAC name of CH3CH2 - O - CH2CH2CH3 is 1-ethoxypropane. It is ether and ethers are named alkoxy alkanes. Here alkyl groups are ethyl and...
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In Any Group Second Period Element Exhibit Anomalous Properties. Correct Statements About This Is/Are: (A) All Second-Period Elements Exhibit A Diagonal Relationship. (B) Generally, Maximum Covalency Of The First Member Of Each Group Cannot Exceed Four. (C) Anomalous Behaviour Is Due To Small Size, Large Charge/Radius Ratio, And High Electronegativity Of The Elements. (D) The First Member Of The P-Block Element Displays Greater Ability To Form P Π-D Π Multiple Bonds To Itself And To The Other Second Period Elements, Compared To Subsequent Members Of The Group
The correct answer is (C) Anomalous Behaviour Is Due To Small Size, Large Charge/Radius Ratio, And High Electronegativity Of The Elements....
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BCl3 Does Not Exist As Dimer But BH3 Exists As Dimer (B2H6). Explain Why?
BCl3 does not exist as a dimer, but BH3 exists as dimer B2H6 because, large-sized chlorine atoms do not fit between the small boron atoms,...
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The Isotopes Of Hydrogen Are (A) Tritium. (B) Protium. (C) Deuterium. (D) All Of These.
The correct answer is (D) All Of These. The hydrogen element has three naturally existing isotopes: hydrogen, deuterium, and tritium. Explore...
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What Is A Physical Change Explain With Example?
Any change in which only physical properties of substances are changed and no new substance is formed is called a physical change, and physical...
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XeF2 Is Linear With Two Lone Pairs of Ofelectrons On Equatorial Position (TRUE/FALSE)
The given statement is true. In XeF2, there are five pairs of electrons around Xe and thus, its geometry is trigonal bipyramidal. The fluorine...
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In Wedged-Dash Notation For Three-Dimensional Representation Of An Organic Molecule, The Dashed Bond Represents: (A) A Bond In The Plane Of The Paper. (B) A Bond Above The Plane Of The Paper. (C) A Bond Below The Plane Of The Paper. (D) A Bond Either Below Or Above The Plane Of The Paper.
The correct answer is (C) A Bond Below The Plane Of The Paper. Explore more such questions and answers at BYJU’S....
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