Basic Science Questions for Competitive Exam

General Science Questions

Q.8 Soda water contains

(A) carbonic acid

(B) sulphuric acid

(C) carbon dioxide

(D) nitrous acid

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Q.9 The most important ore of aluminum is

(A) galena

(B) calamine

(C) calcite

(D) bauxite

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Q.10 Most soluble in water is

(A) camphor

(B) sulphur

(C) common salt

(D) sugar

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Q.11 Chemical formula for water is

(A) NaAlO2

(B) H2O

(C) Al2O3

(D) CaSiO3

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Q.12 The gas usually filled in the electric bulb is

(A) nitrogen

(B) hydrogen

(C) carbon dioxide

(D) oxygen

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Q.13 Washing soda is the common name for

(A) Sodium carbonate

(B) Calcium bicarbonate

(C) Sodium bicarbonate

(D) Calcium carbonate

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Q.14 Quartz crystals normally used in quartz clocks etc. is chemically

(A) silicon dioxide

(B) germanium oxide

(C) a mixture of germanium oxide and silicon dioxide

(D) sodium silicate

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