Chemistry HHW

What is the empirical formula for glucose?

• None of the above

What is the term for the elements that undergo chemical change in a chemical reaction?

• Input

• Reactant

• Element

• Product

Which element among the following shows variable valency?

• Au

• Co

• Cu

• Ne

What is the 14th element in the Periodic Table?

• Sn

• S

• Sl

• Si

Which subatomic part of an atom gives it a positive charge?

• Neutron

• Proton

• Electron

• Nucleus

Fractional distillation is a method of separation of

• solid-solid mixture

• liquid-liquid mixture

• solid-liquid mixture

• gas-liquid mixture

• Yes

• No

• Can't say

What are the possible valencies of sulphur? (select all correct answers)

• 1

• 2

• 3

• 4

When an atom loses an electron, it becomes a

• positive ion

• negative ion

• neutral ion

• neutral atom

Which subatomic particle has negligible mass?

• Electron

• Proton

• Neutron

• Neuron