Metals, Non-Metals, and Reactivity Order of Metals CDS Questions

CDS Chemistry

Metals, Non-Metals, and Reactivity Order of Metals MCQ Questions


13.
Calcium starts floating because the bubbles of ______________ formed stick to the surface of the metal.
A.
Gas
B.
Solid
C.
Liquid
D.
Hydrogen Gas
😑 View Answer Rough Work Error
ANSWER :
D. Hydrogen Gas
14.
_____________ does not react with cold water but reacts with hot water to form magnesium hydroxide and hydrogen.
A.
Zinc
B.
Aluminium
C.
Magnesium
D.
Oxide
😑 View Answer Rough Work Error
ANSWER :
C. Magnesium
15.
What is formula of Magnesium ?
A.
Cu
B.
Zn
C.
Mg
D.
Li
😑 View Answer Rough Work Error
ANSWER :
C. Mg
16.
What is the unit of protons of chlorine atom and its nucleus ?
A.
9
B.
26
C.
17
D.
192
😑 View Answer Rough Work Error
ANSWER :
C. 17
17.
What is the unit of electrons of chlorine atom and its nucleus ?
A.
273
B.
18
C.
16
D.
122
😑 View Answer Rough Work Error
ANSWER :
B. 18
18.
Physical nature of ionic compounds are solids and hard because of the strong force of attraction between the
A.
Positive ion
B.
Positive and Negative ions
C.
Negative ion
D.
Liquid
😑 View Answer Rough Work Error
ANSWER :
B. Positive and Negative ions