The electronic structures of atoms P and Q are shown below :

Based on the information given above, answer the following questions:

(a) If P and Q combine to form a compound, what type of bond is formed between them?

(b) Give the chemical formula of the compound formed.

(c) The compound so formed is dissolved in water. Is the resultant solution acidic or basic in nature? Justify your answer.

(d) Write the chemical equation for the reaction between ‘Q’ and ethanol.

(e) What will be the formula of the compound formed when ‘P’ undergoes bonding with carbon?

A hydrocarbon with the formula C_xH_y undergoes complete combustion as shown in the following equation:

2C_xH_y + 9O₂ → 6CO₂ + 6H₂O

(a) What are the values of ‘x’ and ‘y’?

(b) Give the chemical (IUPAC) name of the hydrocarbon.

(c) Is C_xH_y a saturated or an unsaturated hydrocarbon?

(d) Name the alcohol which on heating with conc. H₂SO₄ will produce the above hydrocarbon C_xH_y.

(e) Write a balanced chemical equation for the reaction of C_xH_y with hydrogen gas in presence of Nickel.

Arnav was making notes and he wrote down the following statements from his understanding of reflection from curved surfaces.

I. Concave mirrors can produce both real and virtual images depending on the position of the object.

II. Convex mirrors always produce real, inverted images regardless of the object’s position.

III. In both concave and convex mirrors, the image location can be determined using the mirror formula $\dfrac{1}{\text f} = \dfrac{1}{\text v} + \dfrac{1}{\text u}$ where $\text f$ is the focal length, $\text v$ is the image distance, and $\text u$ is the object distance.

Choose from the following the correct option that lists the correct statements about reflection from curved surfaces.

options

1. I and II
2. I, II and III
3. II and III
4. I and III

Choose the correct option from the below which explains the reason for us to perceive the day sky as blue.

options

1. As sunlight passes through the atmosphere, shorter wavelengths, such as blue are scattered more than other colors.
2. The sky appears blue because all colors are scattered equally, but blue light is stronger and more visible to the human eye.
3. The blue color of the sky is due to longer wavelengths like red and orange scattering more than shorter wavelengths, making blue stand out more.
4. The atmosphere contains blue-colored particles that give the sky its blue appearance.