Foundation Level - IV NEET Mock test -8 ( Chemistry)

The atomic symbol of silver is —————

• S

• Si

• Au

• Ag

Tags

Atom and molecules

box contains some identical red colour balls labelled as A each weighing 2 g. Another box contains identical blue colored balls, labelled as B, each weighing 5 g. In the combinations AB, AB₂, A₂B and A₂B₃ which is applicable?

• Law of Definite proportion

• Law of multiple proportion

• Law of conservation of mass

• None of the above

Tags

Atom and molecules

What is the value of Avogadro’s number?

• 6.02 x 10^-23

• 6.02 x 10²³

• 6.02 x 10²²

• 6.02 x 10^-22

Tags

Atoms and molecules

What is the chemical formula of sodium carbonate?

• NaHCO₃

• Na₂CO₃

• Na₂HCO₃

• NaCO₃

Tags

Atom and molecules

Which of the following is the correct pair of atom and its atomic symbol?

• Sulphur – Su

• Phosphorus -P

• Sodium-s

• Potassium – P

Tags

Atom and molecules

How many moles are present in 40 g of He?

• 20 moles

• 6 moles

• 10 moles

• 5moles

Tags

Atom and molecules

Atomic mass of Chlorine is ————– (u)

• 34

• 34.5

• 35.5

• 35

Tags

Atoms and molecules

Oxygen is –

• Bivalent

• Tetravalent

• Monovalent

• Trivalent

Tags

Atom and molecules

Neutron is

• Has charge and Massless.

• Chargeless and Massless

• Has charge and Mass

• Chargeless and has Mass

Tags

Atom and molecules

3. 3.42 g of sucrose are dissolved in 18g of water in a beaker. The number of oxygen atoms in the solution are

• 6.09 × 10²²

• 6.68 × 10²³

• 6.022 × 10²¹

• 6.022 × 10²³

Tags

Atoms and molecules