Description : For the COD test of sewage, organic matter is oxidised by K2Cr2O7 in the presence of A. H2SO4 B. HNO3 C. HCl D. None of these
Last Answer : ANS: A
Description : Why is K2Cr2O7 generally preferred over Na2Cr2O7 in a volumetric analysis .Give reason .
Last Answer : Ans : It is because Na2Cr2O7 is hygroscopic in nature that is why it absorbs moisture from atmosphere , therefore its standard solution can not be prepared .
Description : Oxidation of cumene with acidic K2Cr2O7 gives (a) Phenylacetic acid (b) Benzaldehyde (c) Benzyl alcohol (d) Benzoic acid
Last Answer : Benzoic acid
Description : Which of the following reagents can be used to oxidize 1° alcohols to aldehydes? (a) KMnO4 (b) MnO2 (c) K2Cr2O7 (d) PCC
Last Answer : PCC
Description : Oxidation of a secondary alcohol with K2Cr2O7/H+ produces (a) a carboxylic acid (b) a ketone (c) an aldehyde (d) an ester
Last Answer : a ketone
Description : . Glass reacts with (A) H2SO3 (B) HF (C) HNO3 (D) K2Cr2O7
Last Answer : (B) HF
Description : Tip of the match stick contains a mixture of (A) K + S (B) K + S + K2Cr2O7 (C) S + K2Cr2O7 + White P (D) None of these
Last Answer : (C) S + K2Cr2O7 + White P
Description : Collin’s Reagent is? a. K2Cr2O7/H2SO4 b. PCC/CH2Cl2 c. PDC/DCM d. CrO3/pyridine
Last Answer : d. CrO3/pyridine
Description : Which of the statements is not true? (1) K2Cr2O7 solution becomes yellow on increasing the pH beyond 7 (2) On passing H2 S through acidified K2Cr2O7 solution, a milky colour is observed (3) Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis (4) K2Cr2O7 solution in acidic medium is orange
Last Answer : Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis
Description : In the ionic equation `2K^(+)BrO_(3)^(-)+12H^(+)+10e^(-)rarrBr_(2)+6H_(2)O+2K^(+)`, the equivalent weight of `KBrO_(3)` will be : (where M = molecular
Last Answer : In the ionic equation `2K^(+)BrO_(3)^(-)+12H^(+)+10e^(-)rarrBr_(2)+6H_(2)O+2K^(+)`, the equivalent weight of ` ... )`) A. M/5 B. M/2 C. M/6 D. M/4
Description : Is sulfur dioxide molecular or ionic?
Last Answer : Need answer
Description : Is Cos ionic or molecular?
Last Answer : CO is molecular
Description : Is NaCl ionic or molecular compound?
Last Answer : Sodium chloride is an ionic compound.
Description : Is SiO2 ionic or molecular compound?
Last Answer : Silicon dioxide is a covalent compound.
Description : Is N2O5 an ionic or molecular compound?
Last Answer : N2O5 is a molecular compound because it is composed of non-metals, which form covalent bonds when chemically combined.
Description : Is CuS a ionic or molecular compound?
Last Answer : Copper sulfide is an ionic compound.
Description : Is carbon tetrachloride a molecular or ionic?
Last Answer : Carbon tetrachloride is a covalent compound.
Description : Is XeF4 molecular or ionic?
Last Answer : This compound has covalent bonds.
Description : Is iron(iii)oxide a molecular compound or ionic compound and gt?
Last Answer : Iron oxide is an ionic compound.
Description : Is SrO molecular or ionic?
Description : Is BaS molecular or Ionic?
Description : Is AlBr3 ionic or molecular?
Description : Is PtCl2 ionic or molecular?
Description : Is N2O4 an ionic or molecular compound?
Description : Is N2O5 ionic or molecular compound?
Description : Is Ba(SCN)2(S) ionic or molecular compounds?
Description : Is Li2SO4 a molecular or ionic compound?
Last Answer : LI2SO4, lithium sulfate, is an ionic compound.
Description : How compared with the melting points of ionic compounds the melting points of molecular solids tend to be?
Last Answer : Ionic compounds have a higher melting point.
Description : Is HBr molecular or ionic?
Last Answer : HBr is a polar molecular compound which exists in gaseousform.
Description : Is S2Cl2 ionic or molecular?
Last Answer : This is a covalent compound.
Description : Is P4O6 ionic or molecular?
Last Answer : It is a molecular (covalent) compound. Present day text books refer to a covalent compound as a molecular compound, as opposed to an ionic one.
Description : Is FeBr3 ionic or molecular?
Last Answer : Iron(III) bromide is an ionic compound.
Description : Is li2s ionic or molecular?
Last Answer : ddg
Description : Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally-------? A. ionic substances B. metallic substances (Answer) C. molecular solids D. covalent network solids
Last Answer : B. metallic substances (Answer)
Description : Why do alcohols have boiling points much higher than hydrocarbons of similar molecular weight? (a) Alcohols have greater van der Waals attraction forces. (b) Alcohol molecules have greater ... of volatilization. (d) Alcohols must overcome greater ionic forces in the process of volatilization.
Last Answer : Hydrogen bonds must be broken in the process of volatilization
Description : Hydrogen in liquid steels is dissolved (A) As tiny gas bubbles (B) In the atomic form (C) In the ionic form (D) In the molecular form
Last Answer : Option A
Description : Which class of solids could have London Forces the attractive forces between particles in crystal lattice positions? w) ionic x) covalent y) metallic z) molecular
Last Answer : ANSWER: Z -- MOLECULAR
Description : The type of crystal lattice exemplified in a diamo is: w) ionic crystal x) covalent network crystal y) metallic crystal z) covalent molecular crystal
Last Answer : ANSWER: X -- COVALENT NETWORK CRYSTAL