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ECAT Chemistry Online Test MCQs With Answers
Question # 1
Isotopes differ in the
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Number of neutrons
Number of protons
Number of electrons
Number of atoms
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Question # 2
Which one of the following reactions is not spontaneous
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Question # 3
Which structure shows a tertiary alcohol
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CH
3
CH
2
OH
(CH
3
)
2
CHOH
(CH
3
)
3
COH
CH
2
OH
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Question # 4
Which of the following
α
-Amino acids has basic R-group
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Proline
Glutamic acid
Histidine
Valine
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Question # 5
Crystalline form of sulphur stable at room temperature is
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Rhombic sulphur
Monoclinic sulphur
Plastic sulphur
Prismatic sulphur
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Question # 6
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450°C
250°C
850°C
1000°C
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Question # 7
CsF is an ionic compound because:
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High I.P of Cs and high E.A of F.
High I.P of Cs and low E.A of F.
Low I.P of Cs and high E.A of F.
Low I.P of Cs and low E.A of F.
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Question # 8
Cracking done at low pressure and with a catalyst is called _______ cracking
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Thermal
Catalytic
Steam
None of them
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Question # 9
Termochemistry is the study of chemical reaction accompanying
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Heat change
Rate change
Mass change
Volume change
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Question # 10
Which one of the following statement is wrong regarding differences between aldehydes and ketones
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Aldehydes undergo reduction to form primary alcohols while ketones undergo reduction to form secondary alcohols
Aldehydes undergo oxidation to form acids having less number of carbon atoms while ketones undergo oxidation to form acids having same number of carbon atoms
Aldehydes give positive silver mirror test while ketones give negative -mirror test
Aldehydes can undergo polymerization while ketones cannot undergo polymerizarion
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Question # 11
The catalytic prmoter used for the industrial preparation of acetaldehyde is
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PdCI
2
CuCI
2
Pd + CaCI
2
None of these
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Question # 12
The tip of the funnel should touch the side of the beaker in order to avoid :
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Splashing.
Leakage.
Mixing.
Contamination.
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Question # 13
Rutherford's experiment led to the discovery of
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Nucleus
Electron
Proton
alpha particle
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Question # 14
The element caesium bears resemblance with
Choose an answer
Ca
Cr
Rubidium
None of the above
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Question # 15
Carbonates of alkali metals dissolves freely in water to form
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Acidic solutions
Neutral solution
Alkaline solution
None of these
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Question # 16
Which of the following is obtained when Fe reacts with dil. HNO
3
?
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N
2
O
NO
NO
2
None of these
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Question # 17
The number of moles of solute in 1000g (1 Kg) of the solvent is called :
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Molarity
Molarity
Normality
Mole fraction
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Question # 18
Ethylene can be prepared in the laboratory by heating together ethyl alcohol and
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HCI
Phenol
HF
H
2
SO
4
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Question # 19
The chloride of element Q is hydrolysed by water to form an acidic solution and its oxide reacts with acid to form a salt.
What cold be the element Q
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Magnesium
Aluminium
Silicon
Phosphorus
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Question # 20
Unsaturated hydrocarbon containing a double bond are called
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paraffin
Alkanes
Olefins
Acetylene
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Question # 21
Which statement about Arrhenius equation is incorrect
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Factor 'A' called Arrhenius constant depends upon collision frequency of reactants
Rate of reaction increase by increasing temperature
Rate constant k is increased
Activation energy Ea is decreased by rise in temperature
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Question # 22
The alkynides are used for the ----------- of alkynes
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Pxperation
Purification
Seperation
All of above
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Question # 23
Water H
2
O is liquid while hydrogen sulphide H
2
S is a gas beause
Choose an answer
Water has higher molecular weight
Hydrogen sulphide is a weak acid
Sulphure has high electronegativity than oxyhe
Water molecules associate through hydrogen bonding
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Question # 24
Which reaction yields Bakelite?
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Urea with HCHO
Tetramethyl glycol with Hezamethylene diisocyanate
Phenol and HCHO
Ethylene glycol and Dimethylterephthalate
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Question # 25
Amino acids are bifunctional organic compounds what are the two function groups
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Carboxylic acid and alcohol
Alcohol and aldehyde
Carboxylic acids and ketone
Amino group and carboxylic acid
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Question # 26
Cotton is ______% cellulose
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90
100
99
30
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Question # 27
Which of the following statements is incorrect about vitamins
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Often function as coenzymes
Molecules contain at least one ring structure
Are often synthesized by the body
Are polyfunctional compounds
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Question # 28
Steel may be manufacture by two processes which two are correct
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Open hearth process and besemer process
Open hearth process and Haber process
Bassemer process and Haber process
Contact process and Haber process
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Question # 29
Photons of yellow colour are ______ energetic than violet colour
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More
Less
Equal
None
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Question # 30
What is chrome yellow?
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Pbo
Pb
2
O
PbCrO
4
Pb
3
O
4
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Question # 31
Covalent compounds are soluble in
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Polar solvents
Non-polar solvents
Concentrated acids
All solvents
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