NEET QUIZ CHEMISTRY

Aspirin has the formula C₉H₈O₄. How many atoms of oxygen are there in a tablet weighing 360 mg?

• 1.204 x 10²³

• 1.08 x 10₃₂

• 1.204 x 10²⁴

• 4.81 x 10²¹

Total number of ions in 500ml of 0.5 M NaCl solution is:

• 0.5 x 500/1000 x NA x 2

• 0.5 x 500/1000

• 0.5 x 500/1000 x NA

• 0.5 x 500/1000 x NA x 6

Which has the maximum electrons?

• 11.2 L Ne at NTP

• 20 g H₂

• 2 mol SO₂

• 22.4 L CH₄ at NTP

Two flask A and B of equal capacity contains CO₂ and O₂ gas under similar conditions, their ratio of atoms is:

• 3 : 2

• 1 : 1

• 2 : 3

• 2 : 1

The simple formula of compound containing 50% of element X (atomic mass 10) and 50% of element Y (atomic mass 20) is:

• XY

• X₂Y

• XY₃

• X₂Y₃

Tags

NGSS.HS-PS1-7

x g of metal on reaction with oxygen gives y g of metal oxide. The equivalent mass of metal is:

• (y - x) / 8

• (8x) / (y - x)

• x / (y - x)

• 8y / (y - x)

Tags

NGSS.HS-PS1-7

0.252 g of an acid requires 40 ml of 0.1 N NaOH for complete neutralization. Equivalent weight of the acid is:

• 45

• 53

• 40

• 63

If 0.5 mol of CaBr₂ is mixed with 0.2 mol of K₃PO₄ then the maximum number of moles of Ca₂(PO₄)₂ obtained will be:

• 0.5

• 0.2

• 0.7

• 0.1

How much H2 will be obtained from dissociation of 40ml of NH3:

• 60 mL

• 30 mL

• 40 mL

• 120 mL

Tags

NGSS.HS-PS1-7

When 100 gm of ethylene polymerises entirely to polythene, the weight of polythene formed as per the equation is:

n(V2H4) à (-CH2-CH2-)n

• (n/2) gm

• 100 gm

• (100/n) gm

• 100 n gm

Tags

NGSS.HS-PS1-7