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Chemistry

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1511 MCQs

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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.

A 1.6 x 10-27 kg

B 1.6 x 10-24 kg

C 1.6 x 10-26 kg

D 1.6 x 10-28 kg

A Mass number

B Atomic mass

C Relative abundance

D all of the above

A NaCl

B H2O

C CCI4

D It can be applied to all mentioned above

A lighter

B intermediate

C heavier

D are collected at same time

A different number of protons

B same number of neutrons

C different number of neutrons

D same mass number (nucleon number)

A sand

B haemoglobin

C diamond

D maltose

A Mass of an atom itself is in fraction

B Atomic masses are average masses of isobars

C Atmoic masses are average masses of isotopes proportional to their relative abundance

D Atmoic masses are average masses of isotopes

A 80%

B 30%

C 40%

D 20%

A 154

B 280

C 86

D 300

A 0.25

B 0.5

C 0.75

D 1

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1 a.m.u =__________________?

The properties of an element mosly corresponds to that isotope which has greater_________________?

For which of the following compounds the term empirical formula cannot be applied ?

When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen__________________?

Isotopes of the same elements has__________________?

Which of the following is not a macromolecule ?

Mostly elements have fractional atomic masses because of______________________?

Percentage of calcium in calcium carbonate is___________________?

How many isotopes have odd atomic number ?

The number of moles of CO2 which contains 16 g of oxygen is__________________?