88. An element S has the proton number 18. The next element in the periodic table is an element T. Which statement is correct?
A. Element T has one more electron in its outermost shell than element S.
B. Element T has one more electron shell than element S.
C. Element T is in the same group of the periodic table as element S.
D. Element T is in the same period of the periodic table as element S.
89. Substance 'E' when reacts separately with zinc, sodium hydroxide and marble pieces, the respective products formed are hydrogen, sodium chloride and carbon dioxide. Identify the substance 'E'.
A. An alkali
B. An acid
C. An element
D. A salt
90. A yellow colored energy drink consists of a dissolved mixture of red and orange coloring agents. Suggest a suitable mean to separate these coloring agents.
A. Distillation
B. Evaporation
C. Filtration
D. Chromatography
91. What is the minimum age requirement of a person in Nepal to be eligible to vote in the national election?
A. 16 years
B. 18 years
C. 19 years
D. 21 years
92. The headquarter of World Trade Organization is located at London
Answer (2)
The correct answer for the relationship between elements S and T is B, as Element T has one more electron shell than Element S. Substance E is identified as B (an acid), and chromatography is an appropriate method for separating the coloring agents. The minimum voting age in Nepal is B (18 years).
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The next element after S (Argon, atomic number 18) is T (Chlorine, atomic number 17), making the correct answer D, since they are in the same period. Substance E is identified as an acid based on its reactions. For the coloring agents, chromatography is suitable for separation. ;
