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ECAT Chemistry Online Test MCQs With Answers
Question # 1
Sp
3
hybridization occurs when carbon is bound to
Choose an answer
Four other atoms
Three other atoms
Two other atoms
One other atoms
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Question # 2
The filtration process is used to separate solid from
Choose an answer
Liquid
Gas
Solid
All of above
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Question # 3
Ricket is caused due to the deficiency of vitamin
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A
D
B
E
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Question # 4
Boric acid cannot be used:
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An antiseptic in medicine
For washing eyes
In soda bottles
For enamels and glazes
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Question # 5
Which of the following sulphates is not soluble in water
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Sodium sulphate
Potassium sulphate
Zinc sulphate
Barium sulphate
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Question # 6
Acetylene gives
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White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu(NO3)2
White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu2C12
White ppt. with both
Red ppt. with both
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Question # 7
Which one of the following is not an alkali metal
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Francium
Caesium
Rubidium
Radium
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Question # 8
Which is independent of temperature
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Molarity
Molality
Normality
Mole fraction
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Question # 9
The solution left after the formation of crystals is called :
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Residue.
Filtrate.
Mother liquor.
None of these.
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Question # 10
Which of the following element's outermost orbits last electron has magnetic quantum number m=0?
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Na
O
Cl
N
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Question # 11
A limiting reactant is the one which
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Is taken in lesser quantity in grams as compared to other reactants
Is taken in lesser quantity in volume as compared to other reactants
Gives the maximum amount of the product which is required
Gives the minimum amount of the product under consideration
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Question # 12
The value of R (Rydberg's constant) is _______ m-1
Choose an answer
1.0974 x 107
1.0842 x 107
1.082 x 10-7
Both a and b
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Question # 13
Corrosion is basically a
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Altered reaction in presence of H
2
O
Electrochemical phenomenon
Interaction
Union between two light metals and a heavy metal
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Question # 14
Splitting of spectral lines when atoms are subjected to strong electron field is called
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Zeeman effect
Stark effect
Photoelectric effect
Compton effect
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Question # 15
Which of the following is a noble gas:
Choose an answer
Ne.
Cl
2
.
H
2
.
N
2
.
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Question # 16
Which is a good nucleophile?
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F
-1
Cl
-1
Be
-1
I
-1
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Question # 17
NO and NO
2
gases in atmosphere are represented by
Choose an answer
NO
NO
4
NO
x
N
x
O
y
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Question # 18
Which has soapy touch?
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Na2B4O7
H3BO3
Ca2B6O11
HBO2
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Question # 19
Which of the following is a steroid
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Vitamin A
Vitamin B
Vitamin C
Vitamin D
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Question # 20
The sum of mole fractions (X) of components of solution is equal to
Choose an answer
100
200
One
Zero
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Question # 21
Which of the following in an example of reversible reaction
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Question # 22
Li, Be, B, C, O, Fl Ne are elements of
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Second period
First period
Third period
Fourth period
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Question # 23
Biodegradable pollutant is
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Plastic
Asbestos
Sewage
Mercury
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Question # 24
Subsidiary quantum number specifies
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size of orbital
shape of orbital
orientations of orbitals
Nuclear stability
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Question # 25
Sulphuric acid generates nitronium ion by reacting with
Choose an answer
Nitric acid
Nitrogen gas
Nitrous acid
Potassium nitrate
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Question # 26
A polymer may be
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Homopolemer
Co-polymer
Terpolymer
All of these
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Question # 27
By reaction Grignard's reagent with the HCHO we get
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1° - alcohol
2° - alcohol
3° - alcohol
All of these
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Question # 28
In a group, the ionization energy
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Increase
Decreases
Remain constant
First increases then decreases
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Question # 29
Choose an answer
Zero
253 sec
150 sec
500 sec
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Question # 30
Which of the following is known as wood spirit
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Ethyl alcohol
Propyl alcohol
Methyl alcohol
Butyl alcohol
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Question # 31
Choose an answer
The heat released is enthalpy of neutralization
The heat released is enthalpy of atomization
The heat released is enthalpy of sublimation
The heat released is enthalpy of formation
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