10th Science assessment- 8th July

Black and white photography uses

• Decomposition of silver chloride

• Decomposition of silver bromide

• Both

• None of these

Which of the following product is formed when calcium oxide reacts with water?

• Slaked lime

• Carbon dioxide

• Calcium oxide

• Oxygen gas

The respiration process in which glucose reacts with oxygen to produce energy is

• Exothermic reaction

• Endothermic reaction

• Reversible reaction

• Combination reaction

The word oxidation describes 

• gain of electrons
• loss of electrons 
• number of electrons remains the same
• number of electrons transfered

An element plus additional element reacts to form one product is an example of which type of chemical reaction? 

• combustion
• decomposition 
• synthesis 
• single replacement

What type of reaction is the following:
CH₄ + O₂ → CO₂ + 2H₂O

• Decomposition Reaction

• Combination Reaction 

• Combustion Reaction 

• Synthesis Reaction 

Which type of Base is used for the manufacturing of bleaching powder

• Potassium Hydroxide

• Sodium Hydroxide

• Calcium Hydroxide

• Ammonium Hydroxide

What is digestion?

• The process by which food is manufactured to be absorbed?

• The process by which food is broken down to be absorbed?

• The process by which food is manufactured to release energy?

• The process by which food is manufactured to release energy?

Where does digestion starts?

• In the Stomach

• In the Intestine

• In the mouth

• In the oesophagus

Which one is the process by which food moves along the alimentary canal?

• Translocation

• Peristalsis

• Active transport

• Diffusion