QC Lab Chemist Interview Questions and Answers for Freshers

1 cm = 10 mm

• 1 cm is equal to 10 mm

• To convert cm to mm, multiply the value in cm by 10

• For example, 5 cm is equal to 50 mm (5 cm x 10 = 50 mm)

Specific gravity is the ratio of the density of a substance to the density of a reference substance.

• Specific gravity is a unitless measurement that compares the density of a substance to the density of a reference substance (usually water).

• It is commonly used in chemistry to determine the purity of a substance or to identify an unknown substance.

• The specific gravity of water is 1.0, so substances with a specific gravity greater than 1.0 are denser than water, while those with...read more

The unit of resistance is Ohm (Ω)

• The unit of resistance is named after German physicist Georg Simon Ohm

• Resistance is measured in Ohms (Ω)

• Common examples of resistance include resistors in electronic circuits

pH range is a scale used to specify the acidity or basicity of a solution. It ranges from 0 to 14, with 7 being neutral.

• pH range is from 0 to 14

• pH 7 is considered neutral

• Acidic solutions have pH values below 7

• Basic solutions have pH values above 7

• Some reactions are pH dependent, such as enzyme activity

Percentage can be found by dividing the part by the whole and multiplying by 100.

• To find percentage, divide the part by the whole and multiply by 100.

• For example, to find 20% of 50, calculate (20/100) * 50 = 10.