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.

Methyl alcohol is not used as___________________?
A a solvent
B an anti freezing agent
C a substitute for petrol
D for denaturing of ethyl alcohol
Correct Answer: a substitute for petrol
All the following variables are used to describle gases except__________________?
A pressure
B volume
C moles
D density
Correct Answer: density
Dempsters mass spectrometer has number of zones / parts_________________?
A 5
B 4
C 3
D 2
Correct Answer: 5
When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ?
A 0.5
B 1
C 1.5
D 2
Correct Answer: 2
The nucleus of an atom of every element will always contain____________________?
A neutrons
B protons and electrons
C protons
D protons and neutrons
Correct Answer: protons
Which of the following methods is used to estimate hydrogen in an organic compound ?
A Combustion method
B Dumas method
C Kjeldahls method
D All of the above methods are for different purposes
Correct Answer: Combustion method
Isotopes differ in_________________?
A properties which depend upon mass
B arrangement of electrons in orbitals
C chemical properties
D all of the above
Correct Answer: properties which depend upon mass
Combustion analysis is performed to determine__________________?
A Empirical formula
B Molecular mass
C Molecular formula
D Formula mass
Correct Answer: Empirical formula
Qualitative analysis is carried out for _________________?
A identification of elements
B estimation of amounts of elements
C molar ration of elements
D molar volume of elements
Correct Answer: identification of elements
Which of the following statements is wrong about isotopes ?
A they possess different mass number
B they possess different physical properties
C they possess same chemical properties
D they possess different position in the periodic table
Correct Answer: they possess different position in the periodic table