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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
The volume of an ideal gas is decreased to half, What will happen to the force exerted on the walls of the container by the gas particles?
Choose an answer
the force is halved
the force increases by a factor of 4
the force remains constant
the force increased by a factory of 2
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Question # 2
According to charles law there will be a change in the volume of a given mass of a gas by 1/273 of its original volume at 0
°
C if the temperature of the gas is changed by
Choose an answer
10
°
1
°C
100
°C
2
°C
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Question # 3
Doubling the pressure in a liquid phase reaction
Choose an answer
Will double the rex
Will increase the rex
Will decrease the rex
Will not alter the concentration of reactant
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Question # 4
Water soluble and cyrstalline carbohydrrates are:
Choose an answer
monosacharides
obiligoseacharides
polysacharides
a and b
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Question # 5
In s solution 7.8 g of benzene ( C6H6 ) and 46g of toluene (C6H5CH3) is present. The mole fraction of toluene is
Choose an answer
1/3
1/5
2/3
5/6
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Question # 6
Which of the following alcohol cannot be produced by treatment of aldehydes or ketones with NaBH4
Choose an answer
I-propanol
2-Methyl-2-propanol
2-propanol
Ethanol
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Question # 7
Oxidation state of Mn' in KMnO4. K2MnO4, MnO2 and MnSO4 is in the order
Choose an answer
+7.+6.+2,+4
+6,+7,+2,+4
+7. +6.+4.+2
+4, +6, +7,+2
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Question # 8
The pH rain of acid rain is
Choose an answer
8 - 7
7 - 6.5
6.5 - 6
less than 5
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Question # 9
Nitrogen percentage in atmosphere is:
Choose an answer
76%
77%
78%
79%
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Question # 10
Polysaccharides are
Choose an answer
Polyester
Polyamides
Poly ethers
Polynucleotide
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Question # 11
Which of these are isomrophous to one another NaCl, NH
4
Br, K
2
CrO
4
, K
2
SO
4
Choose an answer
NaCl and NH
4
Br both cubic
NH
4
Br and K
2
SO
4 both tetragonal
K
2
CrO
4 and
K
2
SO
4
orthorhombic
NaCl and K
2
SO
4
both rhobohedral
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Question # 12
The solution of which acid is use for seasoning of food?
Choose an answer
Formic acid
Acetic acid
Benzoin acid
Butanoic acid
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Question # 13
The range of UV-B is:
Choose an answer
320 to 400 nm
200 to 280 nm
280 to 320 nm
50 to 400 nm
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Question # 14
The relative abundance of the ions with a definite m/e value is measured by
Choose an answer
High pressure of vapours
Strength of electric current measured
Quantity of fast moving electrons
Electron gas
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Question # 15
Which of the following is the repeating monomeric unit in cellulose
Choose an answer
Sucrose
Maltose
Cellobiose
Glucose
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Question # 16
The process in which solvent particles surround solute particles is called
Choose an answer
Hydrolysis
Hydration
Solvation
Dissolution
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Question # 17
Essential amino acids are those amino acids which
Choose an answer
Body can not synthesize
Body can synthesize
α
-amino acids
β
-amino acids
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Question # 18
An organic compound will decolorise dill acidified (aq) KMnO
4
on warming, but will not decolorise bromine water. What is the compound
Choose an answer
KMnO
4
Ethanol
Ethane
CH
3
CH
2
Cl
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Question # 19
Where energy is released during a reaction it is
Choose an answer
Exothermic reaction
Endothermic reaction
A free radical reaction
A bond breaking reaction
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Question # 20
Each of the following is true of white and red phosphours except that they
Choose an answer
Are both soluble in CS
2
Can be oxidized by heating in air
Consist of the same kind of atoms
Can be converted into one another
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Question # 21
Positive particle in discharged tube is produced by ionization of gas molecules, which is caused by
Choose an answer
Gas molecules collide with anode
Gas molecules are at high temperature
Gas molecules produce X-rays
Cathode rays remove electrons from gas molecules
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Question # 22
During redox reaction an oxidizing agent
Choose an answer
Gains electrons
Is oxidized
Loses electrons
Hydrolysed
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