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Q There are __________ major types of natural environment.

A Five
B Three
C Two
D Four

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KP Boards Science - Class 6th Uploaded By: Safdar Ali

Q Ionization potentials within the periodic table

A Decrease steadily along the period
B Decrease along the period with fluctuations
C Increase steadily along the period
D Increase along the period with fluctuations

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KPPSC Female SS Chemistry 25-05-23 Uploaded By: Jawad Bashir

Q Which of the following class of the compound is most prone to decarboxylation following hydrolysis

A β-keto esters
B α-halo amides
C β-hydroxy acids
D α-halo esters

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KPPSC Female SS Chemistry 25-05-23 Uploaded By: Jawad Bashir

Q Which of the following detector is not commonly paired with GC?

A FID
B ECD
C MS
D Interferometer

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KPPSC Female SS Chemistry 25-05-23 Uploaded By: Jawad Bashir

Q Which of the following does not describe structure types pf polyhedral polyboron-hydride cade compounds?

A Quadro-
B Nido-
C Closo-
D Kiado-

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KPPSC Female SS Chemistry 25-05-23 Uploaded By: Jawad Bashir

Q All of the following are powerful electrophiles except

A BF₃
B AICI₃
C PH₃
D NO

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KPPSC Female SS Chemistry 25-05-23 Uploaded By: Jawad Bashir

Q An S_N2 reaction on a chiral center with configuration R must result in a product with a configuration that is:

A Exclusively S
B Exclusively S or achiral
C Racemic
D Exclusively S or R or achiral

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KPPSC Female SS Chemistry 25-05-23 Uploaded By: Jawad Bashir

Q What is the bond order of He₂?

A 0
B 1
C 1/2
D 2

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KPPSC Female SS Chemistry 25-05-23 Uploaded By: Jawad Bashir

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