Some Basic Concepts In Chemistry Mock Tests

38 questions available

Some Basic Concepts In Chemistry Mock Test 1

Questions: 30

Some Basic Concepts In Chemistry Mock Test 2

Questions: 8

Sample Questions

NEET Chemistry

The percentage of nitrogen in urea (NH₂CONH₂, molar mass = 60 g mol⁻¹) is approximately:

A 28%

B 46.67%

C 21%

D 60%

JEE Main Chemistry

Moles of electrons transferred per mole of Al2O3 formed from elements:

A 2

B 3

C 4

D 6

NEET Chemistry

One gram of an organic compound produces 0.96 g of carbon on complete combustion. What is the percentage of carbon in the compound?

A 72%

B 80%

C 96%

D 48%

NEET Chemistry

How many electrons are present in 1.8 mL of water? (NA = 6.022 × 10²³ mol⁻¹)

A 6.022 × 10²³

B 10 × 6.022 × 10²³

C 18 × 6.022 × 10²³

D 0.1 × 6.022 × 10²³

JEE Main Chemistry

10 g of a mixture of CaCO₃ and MgCO₃ on heating gave 5.1 g of residue (oxides). The percentage of CaCO₃ in the mixture is: (Atomic masses: Ca = 40, Mg = 24, C = 12, O = 16)

A 40%

B 50%

C 60%

D 70%

NEET Chemistry

In the reaction N₂ + 3H₂ → 2NH₃, 28 g of N₂ reacts with 6 g of H₂. Which is the limiting reagent? (Atomic mass: N = 14, H = 1)

A N₂

B H₂

C Both are limiting

D Neither — both are in stoichiometric ratio

NEET Chemistry

The volume occupied by 1 mole of any ideal gas at STP is:

A 11.2 L

B 22.4 L

C 44.8 L

D 2.24 L

NEET Chemistry

The number of atoms present in 0.5 mole of N₂ molecules is:

A 3.011 × 10²³

B 6.022 × 10²³

C 12.044 × 10²³

D 1.5 × 10²³

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