JEE Main Chemistry - Chemistry of Non Metals I
Exam Duration: 60 Mins Total Questions : 30
A white crystalline substance X on heating with conc. H2 SO4 gave acidic vapours. On heating alone it give a gas which rekindled a glowing splinter. On heating with NaOH it gave a gas which turned re litmus blue,X is
- (a)
NaNO3
- (b)
NH4NO2
- (c)
KNO3
- (d)
NH4NO3
Nitrogen dioxide cannot be obtaind by heating
- (a)
KNO3
- (b)
Pb(NO3)2
- (c)
Cu(NO3)2
- (d)
AgNO3
One mole of N2H4 loses ten moles of electrons to form a new compound X. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitriogen in X? (There is no change in the oxidation state of hydrogen).
- (a)
-1
- (b)
+1
- (c)
-3
- (d)
+3
The number of neutrons in heavy hydrogen (tritium) atom is
- (a)
0
- (b)
1
- (c)
2
- (d)
3
Hydrogen exists in
- (a)
+1 oxidation state only
- (b)
-1 oxidation state only
- (c)
zero oxidation state only
- (d)
+1, -1 and zero oxidation states
The largest number of hydrogen compounds are formed through
- (a)
ionic bonding
- (b)
covalent bonding
- (c)
H-bonding
- (d)
coordinate bonding
One of the following does not produced nascent hydrogen
- (a)
Cu/HCL
- (b)
Sn/HCL
- (c)
Zn/HCL
- (d)
Al/HCL
Siliver chloride dissolves in solution of ammonia but not in water because
- (a)
ammonia is better solvent than water
- (b)
silver ion forms a complex ion with water
- (c)
ammonia is a stronger based than water
- (d)
The dipole moment of water is higher than that of ammonia molecule
One litre of certain sample of hydrogen peroxide gave 20 litres of oxygen measured at STP. It should be labelled
- (a)
dil. H2O2
- (b)
Conc. H2O2
- (c)
Anhydrous H2O2
- (d)
20 vol H2O2
From which of the following will dilute H2SO4 liberate H2O2?
- (a)
NO2
- (b)
ClO2
- (c)
SnO2
- (d)
none of the above
When superheated steam is passed over heated iron the compound formed is
- (a)
FeO
- (b)
Fe2O
- (c)
Fe3O4
- (d)
Fe(OH)3
The major product of reaction between n - butane and bromine at 130oC is
- (a)
\({ CH }_{ 3 }{ CH }_{ 2 }{ CH }_{ 2 }{ CH }_{ 2 }Br\)
- (b)
\(\underset { \overset { | }{ { CH }_{ 3 } } }{ { CH }_{ 3 }{ CH }_{ 2 }CHBr } \)
- (c)
\(\underset { \overset { | }{ { CH }_{ 3 } } }{ { CH }_{ 3 }-{ CH }_{ 2 }CHBr } \)
- (d)
\(\underset { \overset { | }{ { CH }_{ 3 } } }{ { CH }_{ 3 }CHBr { CH }_{ 2 } } \)
1 - chlorobutane on reaction with alcoholic potash gives
- (a)
1 - butene
- (b)
1 - butanol
- (c)
2 - butene
- (d)
2 - butanol
Acidic hydrogen is present in
- (a)
ethyne
- (b)
ethene
- (c)
cyclodecapentene
- (d)
ethane
Which of the following statement is (are) correct for benzene?
- (a)
All the six carbon atoms and all the six hydrogen atoms lie in the different plane
- (b)
The ring system consists of a localised C - C, \(\pi\) - bonds
- (c)
The ring system consists of a delocalised \(\pi\) - molecular orbital containing six electrons
- (d)
Each C - atom is in a state of sp3 hybridisation.
The most reactive isotope of H is
- (a)
protium
- (b)
deuterium
- (c)
tritium
- (d)
All have same reactivity
When different metals like Zn, Sn and Fe are added to dilute sulphuric acid, same gas, which burns explosively in air, when evolved is
- (a)
\(O_2\)
- (b)
\(N_2\)
- (c)
\(Cl_2\)
- (d)
\(H_2\)
Acidified solution of chromic acid on treatment with \(H_2O_2\) yield
- (a)
\(CrO_3+H_2O+CO_3\)
- (b)
\(Cr_2O_2+H_2O+O_2\)
- (c)
\(CrO_5+H_2O+K_2SO_4\)
- (d)
\(H_2Cr_2O_7+H_2O+O_2\)
Amino group, - NH 2 is ortho, a para directing group in case of aromatic electrophilic substitution but nitration of aniline produce a good amount of m-nitroaniline. This is because
- (a)
-NH2 gets converted into \(-{ NH }^{ - }{ NO }_{ 2 }^{ + }\) which is m-directing
- (b)
NH2 gets converted into \(-{ NH }^{ - }{ NO }_{ 2 }^{ + }\) which is m-directing
- (c)
-NH gets converted into \(-{ NH }^{ + }{ NO }_{ 4 }^{ + }\) which is m-directing
- (d)
ortho, para-activity of -NH2 group is completely destroyed during nitration
When silicon is boiled with caustic soda solution, the gas evolved is
- (a)
\(O_2\)
- (b)
\(SiH_4\)
- (c)
\(H_2\)
- (d)
None of these
The critical temperature of water is higher than that of \(O_2\) because \(H_2O\) molecule has
- (a)
few electrons than oxygen
- (b)
two covalent bonds
- (c)
V-shape
- (d)
dipole moment
Very pure hydrogen (99.9%) can be made by which of the following processes?
- (a)
Reaction of methane with steam
- (b)
Mixing natural hydrocarbone of high molecular weight
- (c)
Electrolysis of water
- (d)
Reaction of salts like hydrides with water
One mole of magnesium nitride on reaction with an excess of water gives
- (a)
one mole of ammonia
- (b)
one mole of nitric acid
- (c)
two moles of ammonia
- (d)
two moles of nitric acid