Chemistry

The IUPAC nomenclature of the compound LiAlH4 is?

A. lithiumtetrahydridoaluminate (III) B. aluminium tetrahydrido lithium C. tetrahydrido lithium aluminate (III) D. lithium aluminium hydride Correct Answer: Option A…

5 years ago

What is the reducing agent is reaction below?

6AgNO4(aq) + PH3(g) + 3H2O(l) → 6Ag(s) + H3PO3(g) + 6HNO3(aq) A. HNO3(aq) B. H2O(l) C. PH3(g) D. AgNO3(aq) Correct Answer: Option…

5 years ago

Which of the following salts is slightly soluble in water?

A. AgCl B. CaSO4 C. Na2CO3 D. PbCl2 Correct Answer: Option B - CaSO4 Explanation All sulfates are soluble except…

5 years ago

The colour of methyl orange in alkaline medium is?

A. yellow B. pink C. orange D. red Correct Answer: Option A - yellow Explanation Methyl orange has the property…

5 years ago

Calculate the volume of 0.5 mol dm-³ H2SO4 that is neutralized by 25 cm³ of 0.1 mol dm-³ NaOH

A. 5.0 cm³ B. 2.5 cm³ C. 0.4 cm³ D. 0.1 cm³ Correct Answer: Option B - 5.0 cm³

5 years ago

The acid that is used to remove rust is?

A. Phosphoric acid B. hydrochloric C. trioxonitrate (V) D. tetraoxosulphate (VI) Correct Answer: Option A - Phosphoric acid Explanation: Some…

5 years ago

Carbon (II) oxide is considered dangerous if inhaled mainly because it?

A. can cause injury to the nervous system B. competes with oxygen in the blood C. competes with carbon (IV)…

5 years ago

Coffee stains can best be removed by?

A. Kerosine B. turpentine C. a solution of borax in water D. ammonia solution Correct Answer: Option C - a…

5 years ago

Calculate the solubility in mol dm-³ of 40g of CuSO4 dissolved in 100g of water at 120°C. [Cu = 64, S = 32, O = 16]

A. 4.00 B. 2.50 C. 0.40 D. 0.25 Correct Answer: Option B - 2.50 Explanation Solubility = number of moles…

5 years ago

Substance employed as drying agents are usually?

A. amphoteric B. hygroscopic C. efflorescent D. acidic Correct Answer: Option B = hygroscopic

5 years ago