Chemistry

Which of the following would dissolve in warm dilute H2SO4 without effervescence, to give a blue solution?

A. Copper turnings B. Copper (ll) trioxocarbonate (IV) C. Copper (ll) oxide D. Copper alloy Correct Answer: Option D D.…

6 years ago

Which of the following pairs of reagents reat to produce hydrogen?

A. Zinc and concentrated trioxonitrate (V) acid B. Water and calcium dicarbide C. Copper and dilute hydrochloric acid D. Magnesium…

6 years ago

P Total = P1 + P2 + P 3 + ………Pn’ where P Total is the pressure of a mixture of gasses. The equation above is an expression of

A. Graham's law B. Gay-Lussac's Law C. Boyle's law D. Dalton's law Correct Answer: Option D D. Dalton's law

6 years ago

A sheet of paper is placed in the path of a beam from a radioactive source. The emissions that pass through the paper consist of?

A. alpha particles and gamma rays B. alpha and beta particles C. beta particles and gamma rays D. alpha particles…

6 years ago

Which of the following statements about ideal gases is/are correct?

I. The cohesive forces between their particles are negligible ll. The have no definite volume but occupy the volume of…

6 years ago

Which of the following features of a human skeleton can be determined by carbon-dating?

A. Height B. Mass C. Age D. Race Correct Answer: Option C C. Age

6 years ago

The atom of an element X combines with aluminium (13AI)?

A. AIX2 B. AI2X C. AI2X2 D. AI2X3 Correct Answer: Option D D. AI2X3

6 years ago

Elements which belong to the same group in the Periodic Table are characterized by?

A. difference of +1 in the oxidation numbers of successive members B. presence of the same number of outermost electrons…

6 years ago

The presence of unpaired electrons in an atom of a transition metal gives rise to?

A. paramagnetism B. nalleability C. ductility D. shiny appearance Correct Answer: Option A A. paramagnetism

6 years ago

What is responsible for metallic bonding?

A. Sharing of electrons between the metal atoms B. Attraction between the atomic unclei and cloud of electrons C. transfer…

6 years ago