Chemistry

An increase in the pressure of a gas results in a decrease in its?

A. mass B. vapour density C. volume D. temperature E. concentration Correct Answer: Option C - volume

5 years ago

In linear molecules, the bond angle is?

A. 90° B. 140° C. 109° D. 120° E. 180° Correct Answer: Option E - E. 180°

5 years ago

What is the most probable group of an element which is a soft, silvery white solid and reacts violently with water?

A. Group 0 B. Group 1 C. Group 4 D. Group 6 E. Group 7 Correct Answer: Option B -…

5 years ago

Radon is used as a tracer in medical research because it?

A. is monatomic B. is radioactive C. is a noble gas D. has a complete valence shell E. has a…

5 years ago

The mass number of an element is the sum of its?

A. electrons, neutrons and protons B. electrons and protons C. protons and neutrons D. orbital electrons E. valence electrons Correct…

5 years ago

The phenomenon observed when dust particles collide randomly in a beam of sunlight is known as?

A. Tyndal effect B. diffusion C. osmosis D. brownian movement E. dialysis Correct Answer: Option A - Tyndal effect

5 years ago

Which of the following compounds is used as a gaseous fuel?

A. CH3-COO-CH2-CH3 B. CH3-CH2-CH2-CH3 C. CHCI3 D. CH3-CH2-COOH E. CH3-C=CH Correct Answer: Option B - CH3-CH2-CH2-CH3

5 years ago

A positive reaction to Fehling’s test indicates the presence of?

A. strach B. reducing sugars C. oxidizing agents D. alkanoic acids E. alkanols Correct Answer: Option B - reducing sugars

5 years ago