Final quiz 2nd term 2024

The cells that transmit the hereditary traits from parents to offspring are ..................................

• Genes

• Chromosomes

• Gametes

• nucleus

When the amount of Iodine decreased in food, the .................................... hormone secreation decreases from the ................................................ gland.

• Adrinalen / Adrinal

• Glucagon / Pancreas

• Thyroxin / Thyroid

• Insulin / Pancreas

The quantity of charge passes through a conductor, whose resistance equals 1000 ohm, if the potential difference between its pole equals 220 volt

• 296 Coulomb

• 396 Coulomb

• 496 Coulomb

• 596 Coulomb

Which one of the following reactions forms white preciptation?

• Thernal decomposition of copper sulphate

• Reaction between Sodium and water

• Thermal decoposition of Sodium nitrate

• Reaction between sodium chloride and silver nitrate

Increasing concentration of reactants increases the speed of the chemical reaction because ........................................................................

• Increases the kinitic energy of reactants

• Increases the number of probable collisions betwwen reactants molecules

• Increases the potential energy of reactants molecules

• Decereases the energy of the reaction.

In dynamo, the .......................... energy is converted to ............................. energy

• Electric / Kinetic

• Kinetic / Light

• Electric / Nuclear

• Kinetic / Electric

The recessive trait appears in the individual if he inherted from the parents .............................................

• Tow dominant genes

• One dominian and one recessive genes

• One recissive gene only

• Tow recessive genes

After meal, the level of glucose in blood increases, so ................................... hormone is secreated from ................................... gland

• Thyroxin / Thyroid

• Glucagon / Pancreas

• Calcitonine / Thyroid

• Insuline / Pancreas

The right balanced chemical equation that represents the reaction between potassium and hydrochloric acid is .................................................................................

• 2Na + 2HCl ----------- 2Na Cl + H₂

• K OH + HCl ------ Kcl + H₂O

• Ca CO₃ + 2HCl ----- CaCl₂ + H₂O+ CO₂

• 2K + 2 HCl ------- 2KCl + H₂

In the opposite graph, The right chemical equation that represents the reaction is .................................................. , and the type of this reaction is ..................................................

• 2A ---------- 3B + C

  Thermal decomposition

• 4B + 2C ------- 3A

  Combination reaction

• 3A + 2C ----- 4B

  Simple substitution

• 4B + 3A ------ 2C

  Nutralization reaction