Chemistry

The main characteristic feature of transition metals is that they?

A. have the same atomic size B. are reducing agents C. from ions easily D. have variable oxidation states E.…

5 years ago

The following are uses of radioactive isotopes except for?

A. sterilization of medical equipment B. tracing reaction paths C. dating elements D. radiography E. determining equilibrium positions Correct Answer:…

5 years ago

Which of the following statements below is not correct?

A. Carbon exhibits allotropy B. Sulphur exhibits allotropy C. Chlorine exhibits allotopy D. Nitrogen is a gas E. Argon is…

5 years ago

Which of the following is a neutral oxide?

A. Nitrogen (IV0 oxide B. Carbon (IV) oxide C. Sulphur (IV) oxide D. Phosphorus (IV) oxide E. Nitrogen oxide Correct…

5 years ago

Which of the following types of hybridization gives rise to tetrahedral molecules?

A. sp B. sp² C. sp³ D. sp³d E. sp³d² Correct Answer: Option C - sp³

5 years ago

Which of the following is used as an anaesthetic?

A. CHI3 B. CHCI3 C. CH3OH D. C2H5OH E. CHBr3 Correct Answer: Option B - CHCI3

5 years ago

Detergents are better than soaps for laundry because?

A. detergents are synthetic while soaps are not B. detergents are more soluble in water than soaps C. scum is…

5 years ago

A salt which loses mass when exposed to air is?

A. hygroscopic B. deliquescent C. efflorescent D. fluorescent E. effervescent Correct Answer: Option C - efflorescent

5 years ago

The empirical formula of hydrocarbon containing 0. 12 mole of carbon and 0.36 mole of hydrogen is?

A. CH2 B. CH3 C. C2H2 D. C2H4 E. C2H6 Correct Answer: Option B - CH3

5 years ago

Given that 32.0g sulphur contains 6.02 x 10²³ sulphur atoms how many atoms are there in 2.70g of aluminium? {Al = 27, S =32}

A. 6.02 x 10²³ B. 3.01 x 10²² C. 6.02 x 10²² D. 5. 08 x 10²² E. 3.01 x…

5 years ago