Chemistry

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Basic Chemistry questions for senior secondary school students–You have 20 questions all together.The number of questions will be updated on a weekly basis.

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CCNWORLDTECH REWARDS ALL USERS WHO CROSSES THE PASS MARK WITH POINTS AND CASH REWARDS

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USERS AND STUDENTS WHO FAIL TO REACH THE PASS MARK SHOULD TRY AGAIN.

 

#1 The chemical formular for sand is

#2 What is the chemical symbol for gold?

#3 These are basic particles from which matter could be made EXCEPT

#4 Metals which react with steam only when they are red-hot include

#5 Chemistry can be applied in the following fields EXCEPT

#6 100g of radioactive mass has a half-life of 5 days. Calculate the mass decayed off after 15 days

#7 The atomic mass of an element is mostly due to the mass of

#8 What is the first element on the periodic table?

#9 The periodic classification of elements is an arrangement of the elements in order of their

#10 Which of the following properties increases dawn a group in the periodic table?

#11 The following compounds are hydrocarbons EXCEPT

#12 Zinc Oxide is a

#13 43. Calculate the mass of sodium hydroxide in 5.00dm3 of a 0.125mol dm-3 Solution

#14 Which of the following properties increases dawn a group in the periodic table?

#15 The nitrifying bacteria , nitrosomonas, convert amonia to …

#16 In the reaction between sodium hydroxide and sulphuric acid solutions, what volume of 0.5 molar sodium hydroxide would exactly neutralise 10cm3 of 1.25 molar sulphuric acid?

#17 The following oxides react with both acids and bases to form salts except

#18 What is H20 more commonly known as?

#19 What is the role of MnO¬2 in the reaction represented by the following equation? MnO2 + 4Hcl→

#20 When sodium chloride and metallic sodium are each dissolved in water

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