Chapter

1.how many moles of sulphur are there in 64 gram of element??
2.Fg and Fe represents gravitational and electrostatic forces respectively, between the two electrons situated at a distance of 10 m. The ratio Fg/Fe is of the order of (a) 10^43 (b) 10^36 (c) 10^-43 (d) 10^-36
At what temperature, the rms speed of gas molecules is half the value at STP?  (a) 68.25 K (b) 273 K (c) 345 K (d) 0 K
The mean translational K.E. per unit volume E and the pressure P of a perfect gas are related as (a) P= E / 2V (b) P= 2E / 3V (c) P= 3EV/2 (d) P= 3E/2V
which type of bonding is present in NH4Cl  a) ionic b) covalent c) coordinate covalent  d) all of the above
The products of fermentation of sugar are ethanol and  a) water b) oxygen c) carbon dioxide d) sulphur dioxide
the metal having highest density is  a) Be b) Mg c) Ca d) Ba
the metal which does not react with nitric acid is  a) Fe b) Ti c) U d) Co
NO2 can act as a/an agent  a) reducing b) oxidizing c) dehydrating d) all of the above
In Nelson's Cell reaction of hydroxide ions and chloride ions is prevented by  a) steel gauze b) asbestos diaphragm c) constant level device d) high concentration of brine
Which one is more acidic in nature a) MnO b) Mn2O7 c) MnO2 d) Mn2O3
the ionic compound of which of the following has the highest melting and boiling points. a) F b) Cl c) Br d) I
The excess accumulation of Al and Mn in plants is due to the deficiency of  a) S b) P c) K d) Ca
in a group of triads elements have same properties a) physical b) chemical c) both d) none
An organic compound which show polymerization easily is  a) alkane b) alkene c) alkyne
d) benzene
those hydrocarbons which burn with luminous flame are a) alkanes b) alkynes c) alkenes d) benzene  those organic compounds in which four valencies of carbon are satisfied by single bond are called  a) aromatic b) unsaturated c) saturated d) none of these  An abbreviation of propyl group is  a) Pro b) Pry c) Pr d) Proy
furan is an example of organic compound a) saturated cyclic b) unsaturated cyclic c) unsaturated aromatic d) all of the above e) none of these
Ethers show which of the following isomerism a) position b) functional group c) metamerism d) cis trans
acdic nature of amino acids is due to a) carboxyl group b) amino group c) alkyl group d) all of the above
Zwitter ion structure is also known as  a) double ion b) neutral c) internal salt d) all of the above
The common isotopes of carbon are 12C and 13C. The average mass of carbon is 12.01115 amu. What is the abundance of the 13C isotope? (a) 1.115% (b) 98.885% (c) 0.480% (d) 99.52%
The half-life of francium-212 is 19 minutes. How many minutes will it take for 1 gram of this isotope to decay to 0.125 grams? (a) 4.75 minutes (b) 9.5 minutes (c) 38 minutes (d) 57 minutes
The atom formed by the beta decay of carbon-14 is... (a) oxygen-18 (b) beryllium-10 (c) boron-14 (d) nitrogen-14
The molecule N2 is isoelectronic with... (a) O2 (b) F2 (c) NO (d) CN-