Chemistry

A compound which liberates carbon (IV) oxide from a hydrogentrioxocarbonate (lV) could have the molecular formula?

A. C2H5OH B. C3H4 C. HCOOH D. H2O2 E. C6H6 Correct Answer: Option C - HCOOH

5 years ago

In which of the following are the substances arranged in their correct order of increasing melting point?

A. Sodium chloride, sulphur, diamond B. Diamond, sodium chloride, sulphur C. Sulphur, sodium chloride, diamond D. Diamond, sulphur, sodium chloride…

5 years ago

Which of the following statements is not correct? Group 7 elements?

A. are diatomic B. are good oxidizing agents C. are highly electronegative D. have relatively low ionization potentials E. have…

5 years ago

Which of the following modes of motion is exhibited by the particles of a solid?

A. Vibrational and random motion B. Vibrational and translational motion C. Translational and random motion D. Vibrational motion only E.…

5 years ago

The products of the electrolysis of dilute sodium chloride solution with platinum electrodes are?

A. hydrogen and oxygen B. oxygen and chlorine C. chlorine and water D. sodium amalgam and chlorine E. sodium hydroxide…

5 years ago

Which of the following formula is that of a dicarboxylic acid?

A. (CH3CH2)2CHCOOH B. CH2(OH)2 C. CH3CH(OH)COOH D. CH2(COOH)2 E. CH3COCOOH Correct Answer: Option D - CH2(COOH)2

5 years ago

Brass is an alloy of copper and?

A. iron B. chromium C. zinc D. tin E. magnesium Correct Answer: Option C - zinc

5 years ago

The reaction illustrated by the equation below is an example of?

CH2 = CH2 + H2SO4 → CH3 - CH2 -OSO3H. A. substitution B. oxidation C. reduction D. addition E. displacement…

5 years ago

Which of the following elements can from more than one acidic oxide?

A. Hydrogen B. Sulphur C. Carbon D. Alumium E. Iron Correct Answer: Option B - Sulphur

5 years ago

Which of the processes represented by the following equations has the greatest positive entropy change?

A. C6H3 (l) → C6H6 (g) B. H2O (s) → H2O (l) C. CuO(s) + H2 (g) → Cu(s) +…

5 years ago