IISER Chemistry - Chemistry Of Non-Metals - II
Exam Duration: 45 Mins Total Questions : 30
Which of the following scientists explained that nobel gases too can form chemical compound?
- (a)
N.Bartlett
- (b)
J.Chadwick
- (c)
J.Thomson
- (d)
Hildebrand
Oxidation number of sulpher in S8 is
- (a)
0
- (b)
-2
- (c)
-4
- (d)
8
Which of the following is the Weakest reducing agent?
- (a)
HF
- (b)
HCl
- (c)
HBr
- (d)
HI
which of the following is used as Holme's signals?
- (a)
Ca3P2
- (b)
CaC2
- (c)
Mixture of Ca3P2 and CaC2
- (d)
CaCl2
Correct order of the sizes of iodine species I, I- and I+ is
- (a)
I- > I > I+
- (b)
I > I- > I+
- (c)
I > I+ > I-
- (d)
I+ > I > I-
By passing carbon monoxide over solid caustic soda heated to 2000C and 8 atmospheric pressure, we get
- (a)
sodium bicarbonate
- (b)
sodium carbonate
- (c)
sodium formate
- (d)
sodium oxlate
Which glass has the highest percentage of lead?
- (a)
soda glass
- (b)
flint glass
- (c)
jena glass
- (d)
pyrex glass
The poisonous gas present in the exhaust fumes of air is
- (a)
methane
- (b)
acetylene
- (c)
carbon monooxide
- (d)
ethane
The hardest form of carbon is
- (a)
graphite
- (b)
coal
- (c)
charcoal
- (d)
diamond
Which one of the following is commonly known as water glass?
- (a)
Amorphous silica
- (b)
Kiesel ghur
- (c)
Sodium silicate
- (d)
Calcium silicate
In P4O10 the number of oxygen atoms bonded to each phosphorus atom is
- (a)
2.5
- (b)
3
- (c)
4
- (d)
5
which one of the following statements about H2S is not correct?
- (a)
It is a covalent compound
- (b)
It is a lighter than air
- (c)
It is odourless
- (d)
It is slightly soluable in water and its aqueous solution is acidic in nature
Ozone is made from oxygen by
- (a)
oxidation at high temperature
- (b)
oxidation using a catalyst
- (c)
silent electric dischargr
- (d)
Passing under high pressure
Which one of the following halogens has the highest electron affinity?
- (a)
Fluorine
- (b)
Chlorine
- (c)
Bromine
- (d)
Iodine
Which one of the following is chloric acid?
- (a)
HClO2
- (b)
HOCL
- (c)
HClO3
- (d)
HClO4
Teflon is a halogenated hydrocarbon. Which one of the following hologens is present in Teflon?
- (a)
Chlorine
- (b)
Bromine
- (c)
Fluorine
- (d)
Iodine
One of the products of reaction between solid KMnO and conc.HCl is
- (a)
a red liquid
- (b)
MnO2
- (c)
a greenish yellow gas
- (d)
HCl
Which one of the following will displace Br2 from an aqueous solution containing bromidde ions?
- (a)
I2
- (b)
Cl2
- (c)
Cl-
- (d)
I3
Which one of the following statement is false?
- (a)
Boric acid is obtained by treating diboranr with water
- (b)
Boric acid is obtained by treatingboric oxide with water
- (c)
Barosilicate is obtaind from boric acid
- (d)
Pyrex glass is made of barosilicate glass
Purest form of silica is
- (a)
quartz
- (b)
sandstone
- (c)
flint
- (d)
None of this above
Which difficulty is encountered in pennis method for the preparation of fluorine and is removed in whyflaw-Grat's method?
- (a)
Cathode and anode are not seperated from each other which may result in the combination of H2 and F2 to form HF with explosion
- (b)
electrolyte should be perfectly dry
- (c)
F2 liberated at the anode contains HF as impurity
- (d)
None of the above
Which has the highest calorific value?
- (a)
Natural gas
- (b)
Producer gas
- (c)
Water gas
- (d)
Coal gas
The color of the blue glass is due to the prersence of
- (a)
Cr
- (b)
Co
- (c)
Ni
- (d)
Fe
When hydrogen sulphide is passed through acidific solution of KMnO4,the permangnate is decolourised.In the reaction,change of oxidation state of manganese is is form
- (a)
+7 to +2
- (b)
+7 to +4
- (c)
+2 to +7
- (d)
+4 to +7
Chloromethane on treatment with excess of ammonia yields mainly
- (a)
N-dimethyl methenamine
\(\left( { CH }_{ 3 }-{ N }_{ { \setminus }_{ { CH }_{ 3 } } }^{ { / }^{ { CH }_{ 3 } } } \right) \) - (b)
N - methyl methenamine
\(({ CH }_{ 3 }-NH-{ CH }_{ 3 })\) - (c)
methanamine (CH3NH3)
- (d)
mixture containing all these in equal proportion
The reactivity of alkyl halides depends upon
- (a)
the nature of halogen atom
- (b)
the nature of alkyl group
- (c)
Both (a) and (b)
- (d)
None of the above
The compound (A) in the following reaction sequence is
\(A\overset { { PCl }_{ 5 } }{ \longrightarrow } B\underset { \overset { \downarrow { H }_{ 2 }/Ni }{ propane } \quad \quad }{ \overset { Alc.KOH }{ \longrightarrow } } C\)
- (a)
chloroethane
- (b)
ethanol
- (c)
1,2-dichloroethane
- (d)
None of the above
The major organic compound formed by the reaction of 1,1-trichloroethane with silver powder is
- (a)
acetylene
- (b)
ethene
- (c)
2-butyne
- (d)
2-butene
HBr reacts with \({ CH }_{ 2 }=CH-{ OCH }_{ 3 }\) under anhydrous conditions at room temperature of given
- (a)
\({ CH }_{ 3 }CHO\quad and\quad { CH }_{ 3 }Br\)
- (b)
\({ BrCH }_{ 2 }CHO\quad and\quad { CH }_{ 3 }OH\)
- (c)
\({ BrCH }_{ 2 }-{ CH }_{ 2 }-{ OCH }_{ 3 }\)
- (d)
\({ H }_{ 3 }C-CHBr-{ OCH }_{ 3 }\)
Of the five isomeric hexane, the isomer which can give two monochlorinated compounds, is
- (a)
2-methylpentane
- (b)
2,2-dimethylbutane
- (c)
2,3-dimethylbutane
- (d)
n-hexane