Question : The ______ states that hot water freezes faster than cold water.

Option 1: Heliocentric model

Option 2: Mpemba effect

Option 3: Big Bang theory

Option 4: Oxygen theory

Question : Select the most appropriate option that can substitute the underlined segment in the given sentence.

Cheetahs run faster then lions.

Option 1: run faster than

Option 2: ran faster then

Option 3: are running fast then

Option 4: have ran faster than

Question : Heavy water is made by ______.

Option 1: dissolving salt of heavy metals in distilled water

Option 2: repeated distillation and condensation of water

Option 3: burning Deuterium in oxygen

Option 4: by burning the heavier isotope of Oxygen and Hydrogen

Question : How many oxygen atoms are there in an acetone molecule?

Option 1: 3

Option 2: 1

Option 3: 2

Option 4: 4

Question : How many oxygen atoms are there in a molecule of acetic acid?

Option 1: 1

Option 2: 2

Option 3: 4

Option 4: 3

Question : Select the option that expresses the given sentence in indirect speech.
Pawan said, "I am preparing hot coffee for you."

Option 1: Pawan said that he was preparing hot coffee for me.

Option 2: Pawan had said that he was preparing hot coffee for me.

Option 3: Pawan has said that he was preparing hot coffee for me.

Option 4: Pawan says that he was preparing hot coffee for me.