NEET Chemistry Quiz

Find out the number of atoms present in 1.8 g glucose (C6H12O6);

• 6.02 × 10^21

• 12 × 6.02 × 10^22

• 18 × 6.02 × 10^21

• 24 × 6.02 × 10^21

The number of significant figures in 60.0001 is;

• 5

• 6

• 3

• 2

The oxidation number of Cr in K2Cr2O7 is;

• +6

• –7

• +7

• –2

If 1.5 moles of oxygen combine with Al to form Al2O3, the mass of Al used in the reaction is; (Atomic mass of Al = 27 g mol–1)

• 27 g

• 54 g

• 49.5 g

• 31 g

The highest oxidation state of Mn is shown by;

• K2MnO4

• KMnO4

• MnO2

• MnO

Empirical formula of a compound is CH2O and its vapour density is 30. Molecular formula of the compound is;

• C3H6O3

• C2H4O2

• C2H4O

• CH2O

When 22.4 litres of H2(g) is mixed with 11.2 litres of Cl2(g), at S.T.P., the moles of HCl(g) formed is equal to;

• 1 mol

• 2 mol

• 0.5 mol

• 1.5 mol

P4 + 3NaOH + 3H2O → 3NaH2PO2 + PH3 is an example of;

• Intermolecular Redox

• Intramolecular Redox

• Disproportionation Redox

• None of these

What is the value of x in 3222IOxI12H6I6H O −−+ + → + ?

• 12

• 2

• 6

• 10

Volume of a gas at STP is 1.12 × 10−7 ml. Calculate the number of molecules present in it;

• 3.01 × 10^20

• 3.01 × 10^12

• 3.01 × 10^23

• 3.01 × 10^24