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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.

All Topics  1488

Electrolysis of dilute solution of NaCl results at the anode_______________?
A sodium
B hydrogen
C chlorine
D oxygen
Correct Answer: oxygen
Polyethylene Glycols are used in the preparation of which type of detergents?
A Cationic detergents
B Anionic detergents
C Non-ionic detergents soap
D All of above
Correct Answer: Non-ionic detergents soap
Carnalite has chemical formula__________________?
A KCI
B KCI.MgCl2.6H2O
C Na2B4O7.10H2O
D CaCO3.MgCO3
Correct Answer: KCI
The by-product of the process of Saponification is___________?
A Methanol
B Glycol
C Glycerol
D Sodium hydroxide
Correct Answer: Glycerol
NaOH is named as caustic soda because________________?
A It corrodes the organic tissues
B It is used in soda water
C It reacts with chlorine gas
D It reacts with fats to form soap
Correct Answer: It corrodes the organic tissues
Which of the following statements is false about transition metals?
A They form complexes
B They show variable valency
C All transition metal compounds are paramagnetic
D They form coloured ions
Correct Answer: All transition metal compounds are paramagnetic
First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
A They are more reactive
B They have greater atomic radii
C They have smaller atomic sizes
D All
Correct Answer: They have smaller atomic sizes
Colour in transition metal compounds is attributed to____________?
A Small sized metal ions
B Absorption of light in UV region
C Complete ns sub-shell
D Incomplete (n-1) d sub-shell
Correct Answer: Incomplete (n-1) d sub-shell
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
A Smaller electronegativity of alkali metals
B Smaller ionic radius of these metals
C De-excitation of electrons from higher energy levels to low energy level
D Excitation of electrons from low energy levels to higher energy levels
Correct Answer: De-excitation of electrons from higher energy levels to low energy level
The maximum oxidation shown by manages is_________?
A +2
B +4
C +5
D +7
Correct Answer: +7
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