Major Elements and Metals

Q201: What is the atomic sign of Potassium?

پوٹاشیم کا جوہری نشان کیا ہے؟

P

ta

Pb

K

None of these

Q202: Acidic salt is formed due to

Reaction of strong acid with weak base

Reaction of weak acid with weak base

Reaction of strong acid with strong base

None

Q203: When a bullet is fired upwards vertically it gains in:

Speed

Kinetic energy

Potential energy

Acceleration

Q204: Number of oxygen atoms in CH3 COOH is

2

1

3

8

Q205: If the Radius of curvature of a concave mirror is 60 cm, what is its focal length?

120 cm

30 cm

80 cm

60 cm

Q206: The atomic number of sodium is 11. Then the number of electrons in sodium ion is _________ .

10

12

13

14

Q207: A body falling freely from a height towards the earth moves with uniform

Velocity

Speed

uniform acceleration

None

Q208: Which of the following has highest energy?

مندرجہ ذیل میں سے کس میں سب سے زیادہ توانائی ہے؟

Red light

Violet light

Green Light

Cyan Light

None of these

Q209: The cyclic organic compound having alternate single and double bonds in its structure carbon ring is known as:

Aromatic

Alicyclic

Cycloankales

None of these

Q210: All steps are used for the extraction of metals except

Roasting

Smelting

Transpiration

Bessemerization

Major Elements and Metals

Q201: What is the atomic sign of Potassium?

Explanation

Q202: Acidic salt is formed due to

Explanation

Q203: When a bullet is fired upwards vertically it gains in:

Explanation

Q204: Number of oxygen atoms in CH3 COOH is

Explanation

Q205: If the Radius of curvature of a concave mirror is 60 cm, what is its focal length?

Explanation

Q206: The atomic number of sodium is 11. Then the number of electrons in sodium ion is _________ .

Explanation

The atomic number of sodium is 11. It has 11 electrons. It loses one electron to form sodium ion.
$N a \to N a^{+} + e^{-}$
Then the number of electrons in sodium ion is $11 - 1 = 10$ .

Q207: A body falling freely from a height towards the earth moves with uniform

Explanation

Q208: Which of the following has highest energy?

Explanation

Q209: The cyclic organic compound having alternate single and double bonds in its structure carbon ring is known as:

Explanation

Q210: All steps are used for the extraction of metals except

Explanation

Major Elements and Metals

Q201: What is the atomic sign of Potassium?

Explanation

Q202: Acidic salt is formed due to

Explanation

Q203: When a bullet is fired upwards vertically it gains in:

Explanation

Q204: Number of oxygen atoms in CH3 COOH is

Explanation

Q205: If the Radius of curvature of a concave mirror is 60 cm, what is its focal length?

Explanation

Q206: The atomic number of sodium is 11. Then the number of electrons in sodium ion is _________ .

Explanation

The atomic number of sodium is 11. It has 11 electrons. It loses one electron to form sodium ion.Na→Na++e−Then the number of electrons in sodium ion is 11−1=10.

Q207: A body falling freely from a height towards the earth moves with uniform

Explanation

Q208: Which of the following has highest energy?

Explanation

Q209: The cyclic organic compound having alternate single and double bonds in its structure carbon ring is known as:

Explanation

Q210: All steps are used for the extraction of metals except

Explanation

The atomic number of sodium is 11. It has 11 electrons. It loses one electron to form sodium ion.
$N a \to N a^{+} + e^{-}$
Then the number of electrons in sodium ion is $11 - 1 = 10$ .