MCQs

Q541: Water waves pass from deep into the shallow region and are then refracted. The characteristics of waves which will remain constant is _____?

• A) Direction
• B) Frequency
• C) Speed

Q542: Which one of the following is not a fraction of crude oil?

• A) Petroleum coke
• B) Ammonia
• C) Fuel oil

Q543: Which of the following is used as jet fuel?

• A) Kerosene oil
• B) Fuel oil
• C) Petrol

Q544: The harvesting is most important step of ______?

• A) Preparation of soap
• B) Preparation of cold drinks
• C) Preparation of sugar

Q545: The abrasives are ______?

• A) Water
• B) Water insoluble minerals
• C) Water semi soluble minerals

Q546: The centrifuge machine used for separation of _______?

• A) Juice
• B) pH
• C) Mud

Q547: The citric acid is used in preparation of cold drinks for _____?

• A) Sweet taste
• B) Bitter taste
• C) Sour taste

Q548: The use of potassium hydroxide produced a ________?

• A) Hard soap
• B) Soft soap
• C) Moderate soap

Q549: The carboxylate end of the soap molecule that is attracted to water is called?

• A) Hydrophobic end
• B) End point
• C) Hydrophilic end

Q550: Surfactants reduce the ______ of water.

• A) Viscosity
• B) Surface tension
• C) Boiling point