Chemistry quiz

Elements with similar chemical properties appear in the

• same family

• same period

• p-block elements

• right upper corner

Non-metals usually forms .......... oxides.

• acidic

• amphoteric

• neutral

• all of above

Oxidation state of an atom represents

• number of electrons gained

• number of electrons lost

• apparent charge in the compound

• its valancies

Which one of the following element has highest oxidation state in its compound?

• Cr

• Mn

• Sn

• O

Which of the following is termed as endothermic reaction?

• reaction in which heat is evolved

• reaction in which heat is absorbed

• reaction in which there is loss of oxygen

• reaction in which there is gain of hydrogen

What is the name of the substance which get deposited over iron because of moisture present in the air?

• sulphide

• rust

• carbonate

• oxygen

Which of the following is termed as reducing agent?

• which gives oxygen

• which removes oxygen

• which removes hydrogen

• all of the above

Which of the following shows reduction reaction?

• gain of oxygen

• loss of oxygen

• gain of hydrogen

• none of above

What is another name of quick lime?

• calcium hydroxide

• calcium oxide

• calcium carbonate

• carbon monoxide

Which of the following gives energy while respiration?

• burning of coal

• burning of natural gas

• burning of glucose

• burning of oxygen