Which of the noble gases has the greatest ionization energy

A. He

B. Xe

C. Ar

D. Rr

The weakest attractive force that can be observed between two molecules is

A. ionic

B. covalent

C. co-ordinate covalent

D. vander Waals

An elements used in production of matches is

A. nitrogen

B. aluminum

C. copper

D. sulphur

Cathode rays cause an object placed behind a perforated anode to cast a shadow on the screen. This observation shows that the rays

A. are positively charged

B. are negatively charged

C. Have mass

D. travel in straight lines

Flow of current in electrolytes is due to the movement of

A. electrons

B. Holes and electron

C. Ions

D. Charges

A suitable reagent for distinguish between ethanoic and ethanol is

A. bromine water

B. Fehling’s solution

C. sodium hydrogen trioxocarbonate (iv)

D. Ammoniacal silver trioxonitrate(V)

The above orbital diagram shown the electronic configuration of

A. chlorine

B. nitrogen

C. calcium

D. neon

Which of the following metals burns with brick red

A. Pb

B. Ca

C. Na

D. Mg

In the production of soap, concentrated sodium chloride solution is added to

A. increase the solubility of soap

B. decrease the solubility of the soap

C. saponify the soap

D. emulsify the soap

A liquid that will dissolve fat is

A. hydrochloric acid

B. calcium hydrochloride

C. kerosene

D. water