CBSE
A cubic unit cell of a metal with a molar mass of 63.55 g mol-1 has an edge length of 362 pm. Its density is 8.92 g cm-3. The type of unit cell is
Primitive
Face centred
End centred
Body Centred
1-butyne on oxidation with hot alkaline KMnO4 would yield. Which of the following as end product?
CH3CH2CH2COOH
CH3CH2COOH
CH3CH2CH2COOH + CO2 + H2O
CH3CH2CH2COOH + HCOOH
Identify the major products P, Q and R in the following sequence of reactions:
Which of the following is the major product in the reaction of HOBr with propene?
2-bromo, 1-propanol
3-bromo,1-propanol
2-bromo, 2-propanol
1-bromo, 2-propanol
Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to a gaseous hydrocarbon containing less than four carbon atoms. (A) is
CH ≡ CH
H2C = CH2
CH4
CH3-CH3
In the following conversion,
Identify 'A' from the following option
NaBD4
LiAID4
Mg, ether/D2O
BH3, D2O
The pair of boiling point and compound are given as,
C6H6 (80C); CH3OH (65C); C6H5NO2 (212C) and C6H5NH2 (184C)
Which will show lowest vapour pressure at room temperature?
C6H6
CH3OH
C6H5NO2
C6H5NH2
Which of the following is the correct IUPAC name?
3,4 -dimethyl pentanoyl chloride
1-chloro-1-oxo-2, 3-dimethyl pentane
2-ethyl-3-methyl butanoyl chloride
2,3-dimethyl pentanoyl chloride
Ethers like ROR can be cleaved by concentrated HI but not by HCl because
I- is a weaker nucleophile than Cl-
I- is stronger nucleophile than Cl-
SN1 mechanism carried out in this reaction is rapidly in presence of HI.
None of the above
The compound C7H8 undergoes the following reactions:
The product 'C' is
m-bromotoluene
o-bromotoluene
p-bromotoluene
3-bromo-2,4,6-trichlorotoluene