M C Q s D r i v e

Chemistry 1488 MCQs [All-Courses]

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oost your exam preparation with our Chemistry MCQs designed for PPSC, FPSC, NTS, OTS, PTS, AJKPSC, BPSC, KPPSC, PMS, CSS, and all competitive exams.
Our content covers Basic Chemistry, Atomic Structure, Periodic Table, Chemical Reactions, Acids & Bases, Organic Chemistry, and everyday chemical concepts.

Which of the following type of reaction is 3rd order reaction_________________?
A 2N2O5 = 2N2O4 + O3
B NO + O3 ? NO2 + O2
C 2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2
D None of these
Correct Answer: 2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2
If volumetric analysis methyl orange indicator is used when_________?
A Acid is strong
B Acid is weak
C Bade is strong
D Acid is strong base is weak
Correct Answer: Acid is strong
Among the halogens the rare element is________________?
A Fluorine
B Chlorine
C Astatine
D Iodine
Correct Answer: Astatine
Which statement is incorrect about catalyst___________________?
A it is used in smaller amount
B decrease activation energy
C specific in action
D it affects specific rate constant
Correct Answer: it affects specific rate constant
Ethylene diammine is ligand________?
A mono dentate
B Bi dentate
C tri dentate
D Poly dentate
Correct Answer: Bi dentate
In which compound nitrogen has maximum oxidation state____________________?
A N2O
B NO2
C HNO2
D HNO3
Correct Answer: HNO3
Energy of activation for backward reaction is less than forward reaction for ___________ reactio?
A Endothermic
B Exothermic
C Moderate
D Fast
Correct Answer: Endothermic
Formula of Galena is________?
A PbS
B HgS
C AS2S3
D FeS2
Correct Answer: PbS
Oxygen does not react with all except_________________?
A Alkali
B Acid
C Water
D Metals
Correct Answer: Metals
When the reaction completes in more than one steps rate of reaction will be determined by________________?
A Fast step
B Slowest step
C All steps
D Molecularity of the reaction
Correct Answer: Slowest step