The elements in the periodic table are listed in order of increasing
The elements in the periodic table are listed in order of increasing A. relative atomic number B. atomic…
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The situation obtained when a perfect gas expands into a vacuum is
The situation obtained when a perfect gas expands into a vacuum is A. ΔH is positive and TΔ…
The general formula of alkanones is
The general formula of alkanones is A. RCHO B. R(_2)CO C. RCOOH D. RCOOR Correct Answer: Option B…
Sieving is a technique used to separate mixtures containing solid particles of
Sieving is a technique used to separate mixtures containing solid particles of A. small sizes B. large sizes…
3H(_{2(g)})+ N(_{2(g)})⇔ 2NH(_{3(g)}) ; H= -ve In the reaction above, lowering of temperature will
3H(_{2(g)})+ N(_{2(g)})⇔ 2NH(_{3(g)}) ; H= -ve In the reaction above, lowering of temperature will A. have no effect…
Calculate the percentage composition of oxygen in calcium trioxocarbonate(IV) [Ca=40, C=12, O=16]
Calculate the percentage composition of oxygen in calcium trioxocarbonate(IV) [Ca=40, C=12, O=16] A. 16 B. 48 C. 40…
Which of these alloys contains copper?
Which of these alloys contains copper? A. solder B. steel C. permallory D. bronze Correct Answer: Option D…
If the molecular mass of tetraoxosulphate (VI) acid is 98, calculate its vapour density.
If the molecular mass of tetraoxosulphate (VI) acid is 98, calculate its vapour density. A. 196 B. 49…
In electrovalency, the oxidation number of the participating metal is always
In electrovalency, the oxidation number of the participating metal is always A. decreasing B. increasing C. constant D.…
The ionic radii of metals are usually
The ionic radii of metals are usually A. greater than their atomic radii B. unaffected by the charge…