Chemistry

Question 1

1Sodium hydroxide is manufactured by the

Medium

A. fermentation B. electrolysis of brine C. heating limestone D. Contact process

Question 2

2The flame colour of sodium is ___.

Easy

Your answer (fill in the blank)

Question 3

3The process used to make sodium carbonate from brine, ammonia and limestone is the ___ process.

Medium

Your answer (fill in the blank)

Question 4

4Group 1 metals form ions with a charge of

Easy

A. +2 B. +1 C. +3 D. −1

Question 5

5Group 2 metals form ions with a charge of

Easy

A. +3 B. +2 C. +1 D. −2

Question 6

6Which group 2 hydroxide is the most soluble in water?

Hard

A. beryllium hydroxide B. magnesium hydroxide C. barium hydroxide D. calcium hydroxide

Question 7

7Sodium burns in air with a

Easy

A. green flame B. blue flame forming sodium chloride C. golden-yellow flame to form sodium oxide D. red flame forming hydrogen

Question 8

8Sodium reacts with water to give sodium hydroxide and ___ gas.

Easy

Your answer (fill in the blank)

Question 9

9Magnesium reacts with steam to give

Medium

A. magnesium hydroxide and oxygen B. no reaction C. magnesium carbonate D. magnesium oxide and hydrogen

Question 10

10Sodium carbonate is manufactured by the

Medium

A. Solvay process B. Ostwald process C. Haber process D. Contact process