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Entrance Exam Questions of Class 11 (Chemistry Page 1)

Monday, July 4, 2011

These are Probable Question asked in the Entrance Examination Held in renowned colleges(St. Xaviers, Budhanilkantha, SOS,..etc) in Nepal. 
(note: "#" Indicates the power of given term)

Entrance Examination Traning Software for the SLC Graduates for +2

Question
Option1
Option2
Option3
Option4
Ans
Which of the following oxide imparts the green colour in the glass?
PbO
Cr$2O$3
Fe$2O$3
ZnO
2
Froth floatation is the process of concentration of which of the ores?
Oxide
Sulphide
Carbonate
Sulphate
2
Which of the following is known as philosophers wool?
ZnSO$4.7H$2O
ZnO
FeSO$4.7H$2O
FeO
2
The rxn NH$4 CNO NH$2 – CO – NH$2 is of the type:
Oxidation –reduction
Isomerization
Neutralization
Analysis
2
Who is the father of chemistry?
Dalton
Berzellius
Lavosier
None
3
Formalin is used as:
Disinfectant reagent
Preservation of biological specimens
Both a and b
None
3
Monomer of Bakelite plastic is:
phenol + formaldehyde
carbolic acid + Acetaldehyde
phenol + ethyl alcohol
None
1
Who has discovered molecule term?
Dalton
Avogadro
Rutherford
None
2
Who has discovered nucleus of the atom?
Avogadro
Rutherford
Neil Bohr
None
2


Galena is the ore of:
Silver
Magnesium
Lead
copper
3
Molecular formula of plaster of Paris is:
CaSO$4.H$2O
(CaSO$4)$2.H$2O
CaSO$4.2H$2O
None
2
Molecular formula of green vitriol is:
CuSO$4.5 H$2O
FeSO$4.7H$2O
ZnSO$4,. 7H$2O
MgSO$4.7H$2O
2

Which of the following statement is not true for ethyne gas?
It is an unsaturated hydrocarben
It is the monomer of benzene
It satisfies the formula Cn H$2n -2
Benzene is natural polymer
4
Haematite is the ore of:
Zinc
Copper
Iron
None
3
A gas Y burns in air and adsorbed by palladium metal is:
Nitrogen
Oxygen
Hydrogen
None
3
The gas which is obtained by heating potassium nitrate, is absorbed by alkaline pyrogallate solution is:
N$2
O$2
NH$3
NO$2
2
BHC is an example of:
Fertilizer
Antiseptic
Insecticides
None
3
Iodine of Tincture is:
Antiseptic
Analgesic
Both a and b
None
3
Molecular formula of Bleaching powder is:
Ca(OCl)Cl
CaOCl
Ca(OCl)$2
None
1
Molecular formula of lunar caustic is:
KOH
NaOH
AgNO$3
None
3
Litharge is the ore of:
Zinc
Lead
Tin
Iron
2
How many grams of NaOH are needed to make 100 gram of a 5% solution?
0.5
5
20
None
2
How many grams of CO$2 can be prepared from 150 gram of calcium carbonate reacting with an excess of hydrochloric acid solution?
66
22
33
None
1
All of the following are compounds except:
Copper Sulphate
Carbondioxide
Washing Soda
Air
4
In general, when metal oxides react with water, they form solutions that are:
Acidic
basic
Neutral
None
2
Electrolysis of a dilute sodium chloride solution results in the cathode product is
Sodium
Hydrogen
Chlorine
Oxygen
2
A component whose molecular mass in 90 grams contain 40.0% carbon, 6.67% Hydrogen and 53.33% oxygen. What is true formula for the compound?
C$2H$2OH
CH$2O$4
C$3H$6O$3
C$3HO$3
3
How many moles of CaO are needed to react with an excess of water to form 370 gram of calcium hydroxide?
1
5
3
4
2
An organic compound has been found to possess the empirical formula CH$2O and molecular weight 90. Give its molecular formula (C = 12, H = 1, O = 16)
CH$3COOH
HCOOH
C$6H$12O$6
C$3H$6O
4
An organic compound on analysis was found to contain 10.06% carbon, 0.84% hydrogen and 89.1% chlorine. Calculate its empirical formula.
CHCl$2
CH$2Cl$2
CH$2Cl$3
CHCl$3
4
Which one is physical change?
burning of S in air
burning of C in air
corrosion of metal
conversion of white phosphorus to red phosphorus
4
How much sodium iodide will saturate 60 grams of water at 20°C, if its solubility be 178.
100
96
106.8
206
3
How many electrons are present in Fe+++ ion?
23
24
25
26
1
20 gram of a solution saturated with a salt at 80°C is cooled to 30oC. How much of the salt will crystalise out of the solution, if its solubility at 80°C and 30°C are 100 and 25 respectively?
15 gram
9 gram
6 gram
7.5 gram
4
When the ammonium nitrite is heated, we get:
O$2
N$2
NH$3
None
2
The ionic compound formed in between Gr I and Gr VII in periodic table is:
CaCl$2
AlCl$3
CCl$4
NaCl
4
You are given AgCl in aqueous solution, how would you separate AgCl?
sublimation
atmolysis
solvent extraction
filtration
4
Calculate the total no. of electrons present in 1.6 gm of methane if gram mol. weight of methane = 16g.
6.023 × 10#23
6.023 × 10#-23
6.023 ×10#21
6.023 × 10#20
1
Element used in photoelectric cell is:
Li
Na
Cs
Fr
3
The number of water molecules present in 1 litre of water is:
18
18 × 1000
NA
55.55NA
4
Which has maximum number of atoms?
24 gm of C(12)
56 g of Fe (56)
26 gm of Al (27)
108 gm of Ag (108)
1
Positron is anti-particle of electron. Positron is:
-1e#0
+1e#0
1H#1
+1e#-1
2
The correct ground state electronic configuration of chromium atom (At No: 24) is:
[Ar] 3d54s1
[Ar]3d4s2
[Ar]3d6s6
[Ar]4d54s1
1
Diagonal relationship is shown by elements of second period. Diagonal relation exists between:
Li and Mg
Na and Mg
K and Mg
Al and Mg
1
If the valence shell structure of an element is ns2np5, this element belong to:
alkali metal
inert metal
alkaline earth metal
halogens
4
The size of following species in increasing order is correct in:
I-<I<I+
I< I+ < I-
I+<I<I-
I-<I+<I
3
Which of the following has highest affinity for haemoglobin?
CO$2
CO
C
Blood
2
The liquefied petroleum gas mainly contains:
methane + ethane
ethane + propane
butane + isobutene
methane + propane
3
Commercially Hydrogen is obtained from:
coal gas
oil gas
marsh gas
producer gas
3
The acid anhydride of HNO$3 is:
NO$2
N$2O$4
NO$3
N$2O$5
3
Tear gas is chemically:
acetyl salicylic acid
chloropicrin
phenyl isocyanide
carbon monoxide
2





2 comments:

Anonymous said...

some answers r totally wrong

Bharat Dhungana said...

Thanks for your kind support.