Keam mocktest part 1| Day 2

KEAM Mock Test

Some Basic Concepts of Chemistry

1. The number of moles in 28 grams of nitrogen (N) is:

A) 1 mole

B) 2 moles

C) 0.5 moles

D) 2.5 moles

2. Which of the following is a strong electrolyte?

A) Acetic acid

B) Ammonia

C) Sodium chloride

D) Glucose

3. The molar mass of glucose (C6H12O6) is:

A) 180 g/mol

B) 150 g/mol

C) 160 g/mol

D) 170 g/mol

4. The empirical formula of a compound is CH2O and its molecular mass is 180 g/mol. The molecular formula of the compound is:

A) C2H4O2

B) C6H12O6

C) C3H6O3

D) C4H8O4

5. Avogadro's number is:

A) \(6.022 \times 10^{22}\)

B) \(6.022 \times 10^{23}\)

C) \(6.022 \times 10^{24}\)

D) \(6.022 \times 10^{25}\)

Structure of Atom

1. The number of protons in the nucleus of an atom is called its:

A) Atomic number

B) Mass number

C) Isotopic number

D) Neutron number

2. The maximum number of electrons that can be accommodated in a shell is given by:

A) \(2n\)

B) \(2n^2\)

C) \(n^2\)

D) \(2n + 2\)

3. The first ionization energy is highest for which of the following elements?

A) Sodium

B) Magnesium

C) Potassium

D) Neon

4. Which of the following has the same number of electrons as neon?

A) \(O^{2-}\)

B) \(Na^+\)

C) \(Mg^{2+}\)

D) All of the above

5. The shape of \(p\)-orbitals is:

A) Spherical

B) Dumbbell-shaped

C) Double-spherical

D) Planar

Periodicity

1. The most electronegative element is:

A) Fluorine

B) Oxygen

C) Chlorine

D) Nitrogen

2. Which element has the highest ionization energy?

A) Helium

B) Neon

C) Argon

D) Krypton

3. Atomic radius decreases across a period due to:

A) Increase in nuclear charge

B) Increase in electron shielding

C) Increase in atomic mass

D) Increase in atomic number

4. The element with atomic number 29 is:

A) Copper

B) Zinc

C) Nickel

D) Gallium

5. Which of the following is an alkaline earth metal?

A) Sodium

B) Magnesium

C) Potassium

D) Iron

Straight Line

1. The slope of the line passing through the points (1, 2) and (3, 4) is:

A) 1

B) 2

C) 0.5

D) -1

2. The equation of a line parallel to y = 3x + 2 and passing through the origin is:

A) y = 3x

B) y = -3x

C) y = x

D) y = 2x

3. The intercept form of a line is given by:

A) x/a + y/b = 1

B) y = mx + c

C) ax + by = c

D) ax^2 + by^2 = 1

4. The distance between the points (2, 3) and (5, 7) is:

A) 5

B) 6

C) 4

D) 2

5. If the line y = mx + c passes through the point (0,0), then:

A) c = 0

B) m = 0

C) x = 0

D) y = 0

Electrostatics and Capacitance

1. The SI unit of electric charge is:

A) Volt

B) Coulomb

C) Farad

D) Ampere

2. The capacitance of a capacitor is directly proportional to:

A) Distance between the plates

B) Area of the plates

C) Dielectric constant

D) Square of the area of the plates

3. The electric field inside a conductor is:

A) Zero

B) Uniform

C) Variable

D) Infinite

4. The potential difference between two points is:

A) Work done to move a unit charge between the points

B) Force exerted on a unit charge between the points

C) Energy required to move a unit charge between the points

D) Power consumed to move a unit charge between the points

5. A parallel plate capacitor has a capacitance of 20 μF. If the distance between the plates is doubled, the new capacitance will be:

A) 40 μF

B) 10 μF

C) 20 μF

D) 5 μF

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