Chemistry - Chemistry of Non Metals I
Exam Duration: 45 Mins Total Questions : 30
When a substance Areacts with warer it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with the water. When another substance D reacts with the solution of C, it also produces the same gas B on warming but D can produce B on reaction with dilute H2SO4 at room temperature. A imparts a deep yellow colour to a smokeless flame of Bunsen flame of Bunsen Burner. A B C and D respectively are
- (a)
K, H2, KOH, Al
- (b)
Na, H2 NaOH, Zn
- (c)
CaC2, C2H2, Ca(OH)2, Fe
- (d)
Ca, H2, Ca(OH)2,Sn
Copper dissolves in dilute nitric acid and the gas evolved is
- (a)
N2O
- (b)
NO
- (c)
N2O3
- (d)
N2O5
Which acid makes iron passive?
- (a)
hydrochloric
- (b)
sulphuric
- (c)
fuming nitric
- (d)
hydrofluoric
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
One of the following does not produced nascent hydrogen
- (a)
Cu/HCL
- (b)
Sn/HCL
- (c)
Zn/HCL
- (d)
Al/HCL
The high temperature produced in Atomic Hydrogen torch is due to
- (a)
decomposition of hydrogen molecules
- (b)
recombination of hydrogen atoms
- (c)
reducing power of hydrogen atoms
- (d)
reactive nature of hydrogen
Nitrosifying bacteria conver ammonium compounds into
- (a)
nitrites
- (b)
nitrates
- (c)
N2+O2
- (d)
N2+H2
Which of the following chemicals is not present in clear hard water?
- (a)
Mg(HCO3)2
- (b)
CaCl2
- (c)
MgSO4
- (d)
CaCO3
The oxide that gives hydrogen peroxide on treatment with a dilute acid is
- (a)
PbO2
- (b)
Na2O2
- (c)
MnO2
- (d)
TiO2
One of the following is an incorrect statement. Point out that one
- (a)
Hardnes of water depends upon its soap consuming power
- (b)
Temporary hardness is due to bicarbonate of calcium and magnesium
- (c)
Permanent hardness is due to soluble suphat chlorides of Cu and Mg
- (d)
Permanent hardness can be removed by boiling the water
All the metals form oxides of the type MO, except
- (a)
barium
- (b)
copper
- (c)
silver
- (d)
lead
H2O2 acts as a reducing agent in the reaction
- (a)
H2O2 + SO2\(\rightarrow\) H2SO4
- (b)
H2O2 + Ag2O \(\rightarrow\) 2Ag + H2O + O2
- (c)
H2O2 + 2KI \(\rightarrow\) 2KOH + I2
- (d)
4H2O2 + Pbs \(\rightarrow\) PbSO4 + 4H2O
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)
\(\underset { \overset { | }{ { CH }_{ 3 } } }{ { CH }_{ 3 }CHBr { CH }_{ 2 } } \)
During debromination oof meso -2, 3- dibromobutane, the major compound formed is
- (a)
n - butane
- (b)
1 - butene
- (c)
cis -2- butene
- (d)
trans -2-butene
Which of the following will not show geometrical isomerism?
- (a)
- (b)
- (c)
- (d)
Which of the following annulenes is antiaromatic?
- (a)
Benzene
- (b)
Cyclobutadiene
- (c)
Cyclodecapentene
- (d)
Cyclooctatetraene
Identify Z in the sequence
\({ CH }_{ 3 }-{ CH }_{ 2 }-CH={ CH }_{ 2 }\underrightarrow { HBr/{ H }_{ 2 }{ O }_{ 2 } } Y\\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \ \underrightarrow { { C }_{ 5 }{ H }_{ 5 }\bar { O } { Na }^{ + } } Z\)
- (a)
\({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 2 }O-{ CH }_{ 2 }{ CH }_{ 3 }\)
- (b)
\({ CH }_{ 3 }{ CH }_{ 2 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -O-{ CH }_{ 2 }{ CH }_{ 3 }\)
- (c)
CH3-(CH2)3-O-CH2-CH3
- (d)
CH3-(CH2)4-O-CH3
Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?
- (a)
Ethyl acetate
- (b)
Acetic acid
- (c)
Acetamide
- (d)
Butane-2-one
The boiling point of water is high because
- (a)
water molecule is linear
- (b)
water molecule is not linear
- (c)
water molecule possess covalent bond between H and O
- (d)
Water molecules associate due to H-bonding
Both temporary and permanent hardness is removed on boiling water with
- (a)
\(CaSO_4\)
- (b)
\(Na_2CO_3\)
- (c)
\(CaCO_3\)
- (d)
\(CaO\)
Hard water becomes free form ... ions when passed through ion exchange resin containing RCOOH groups.
- (a)
\(Cl^-\)
- (b)
\(SO^{2-}_{4}\)
- (c)
\(H_3O^+\)
- (d)
\(Mg^{2+}\)
Match of the following and choose the correct option
Column I | Column II |
A. Synthesis gas | p. Oxidising agent |
B. Heavy water | q. Mixture of Co and \(H_2\) |
C. Hydrogen peroxide | r. Prolonged electrolysis of water |
D. Calgon | s. \(Na_2[Na_4(PO_3)_6]\) |
- (a)
A B C D q r p s - (b)
A B C D s p r q - (c)
A B C D r q p s - (d)
A B C D p r q s
Consider the following statements about intermolecular and intramolecular hydrogen bonds,
I. both type of H-bonds are temperature dependent.
II. Intramolecular H-bond disappears on increasing the concentration.
III. Intramolecular H-bond disappears on decreasing the concentration.
IV. the boiling point of compounds having intramolecular H-bond are lower than that of those compounds which have intermolecular H-bond
Which of the statement given above are correct?
- (a)
I, II and IV
- (b)
III and IV
- (c)
I, III and IV
- (d)
I and II
On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is
- (a)
an alkanol
- (b)
an alkanediol
- (c)
an alkyl cyanide
- (d)
an alkyl isocyanide
Which one of the following methods is neither meant for the synthesis nor for separation of amines?
- (a)
Curtius reaction
- (b)
Wurtz reaction
- (c)
Hofmann's method
- (d)
Hinsberg method