first quiz

which is strong bond among these

• sigma bond

• pie bond

• covalent bond

• none of these

draw boat conformation of benzene

The nucleus of an atom consists of

• electrons and neutrons

• electrons and protons

• protons and neutrons

• all of the above

The number of moles of solute present in 1 kg of a solvent is called its

• molality

• molarity

• normality

• formality

The most electronegative element among the following is

• sodium

• bromine

• fluorine

• oxygen

this is a structure of

• benzene

• cyclohexane

• hexane

• none of these

What is a pure substance that cannot be broken down into any other substance by physical or chemical means. Ex: Gold, Silver, Oxygen, & Nitrogen

• element
• compound
• mixture
• salad

What is an atom which has gained or last electrons called?

• isotope
• atom
• ion
• balanced

What type of mixture contains visible parts (like a salad or a pizza or granite)

• homogenous
• heterogenous

What is the name of this compound?

• ethanol

• ethanal

• ethanone

• methanal