Chem Lab Prelims

Question 1

A document that gives comprehensive information about the chemicals.

Answer 1

Material Safety Data Sheet

Question 2

Appropriate absorptive material for spilled flammable liquid?

Answer 2

Charcoal

Question 3

Usually indicate the presence of films of grease or dirt.

Answer 3

Streaks of water

Question 4

Transfer accurate volume of liquids.

Answer 4

Transfer pipets

Question 5

Designed to contain a specific volume of a solution at a stated temperature (usually at 20 C).

Answer 5

Volumetric Flasks

Question 5

A precisely manufactured glass tube with graduations enabling the measurement of the volume of liquid delivered through the stopcock at the bottom.

Answer 5

Burets

Question 5

3 Balance Equipments

Answer 5

Analytical balance
Top loading balance
Triple beam balance

Question 6

Removes moisture from solids.

Answer 6

Desiccator

Question 7

Explanation of a fact and constantly being tested.

Answer 7

Theory

Question 8

Valid general statement over a wide range of observed phenomena.

Answer 8

Law

Question 9

less general statement than law

Answer 9

Principle

Question 10

tip of the nose or the tip of the middle finger

Answer 10

yard

Question 11

elbow to the tip of the middle finger

Answer 11

cubit

Question 11

A chart in which elements having similar chemical and physical properties are grouped together.

Answer 11

Periodic Table

Question 12

Contains only two atoms

Answer 12

Diatomic molecules

Question 13

Contains more than two atoms

Answer 13

Polyatomic molecules

Question 14

Positive ion, metals

Answer 14

Cation

Question 15

Negative ion, non metals

Answer 15

Anion

Question 16

Metal and non-metal

Answer 16

Ionic compound

Question 17

nonmetallic elements

Answer 17

Molecular compound

Question 18

Two elements

Answer 18

Binary compound

Question 19

three elements

Answer 19

Ternary compound